id stringlengths 24 24 | title stringlengths 3 59 | context stringlengths 151 3.71k | question stringlengths 12 217 | answers dict |
|---|---|---|---|---|
56fa7cba8f12f3190063015e | High-definition_television | Euro1080, a division of the former and now bankrupt Belgian TV services company Alfacam, broadcast HDTV channels to break the pan-European stalemate of "no HD broadcasts mean no HD TVs bought means no HD broadcasts ..." and kick-start HDTV interest in Europe. The HD1 channel was initially free-to-air and mainly compris... | How much did viewers have to pay for the HD1 channel? | {
"text": [
"free-to-air"
],
"answer_start": [
290
]
} |
56fa7cba8f12f3190063015f | High-definition_television | Euro1080, a division of the former and now bankrupt Belgian TV services company Alfacam, broadcast HDTV channels to break the pan-European stalemate of "no HD broadcasts mean no HD TVs bought means no HD broadcasts ..." and kick-start HDTV interest in Europe. The HD1 channel was initially free-to-air and mainly compris... | What was on HD1 for 4 or 5 hours per day? | {
"text": [
"a multi-lingual soundtrack on a rolling schedule"
],
"answer_start": [
392
]
} |
56fa81d38f12f31900630165 | High-definition_television | These first European HDTV broadcasts used the 1080i format with MPEG-2 compression on a DVB-S signal from SES's Astra 1H satellite. Euro1080 transmissions later changed to MPEG-4/AVC compression on a DVB-S2 signal in line with subsequent broadcast channels in Europe. | What format did the first European HDTV broadcast use? | {
"text": [
"1080i format"
],
"answer_start": [
46
]
} |
56fa81d38f12f31900630166 | High-definition_television | These first European HDTV broadcasts used the 1080i format with MPEG-2 compression on a DVB-S signal from SES's Astra 1H satellite. Euro1080 transmissions later changed to MPEG-4/AVC compression on a DVB-S2 signal in line with subsequent broadcast channels in Europe. | What compression did the first European HDTV broadcast use? | {
"text": [
"MPEG-2"
],
"answer_start": [
64
]
} |
56fa81d38f12f31900630167 | High-definition_television | These first European HDTV broadcasts used the 1080i format with MPEG-2 compression on a DVB-S signal from SES's Astra 1H satellite. Euro1080 transmissions later changed to MPEG-4/AVC compression on a DVB-S2 signal in line with subsequent broadcast channels in Europe. | What signal did the first European HDTV broadcast use? | {
"text": [
"DVB-S"
],
"answer_start": [
88
]
} |
56fa81d38f12f31900630168 | High-definition_television | These first European HDTV broadcasts used the 1080i format with MPEG-2 compression on a DVB-S signal from SES's Astra 1H satellite. Euro1080 transmissions later changed to MPEG-4/AVC compression on a DVB-S2 signal in line with subsequent broadcast channels in Europe. | What compression did Euro1080 later change to? | {
"text": [
"MPEG-4/AVC"
],
"answer_start": [
172
]
} |
56fa81d38f12f31900630169 | High-definition_television | These first European HDTV broadcasts used the 1080i format with MPEG-2 compression on a DVB-S signal from SES's Astra 1H satellite. Euro1080 transmissions later changed to MPEG-4/AVC compression on a DVB-S2 signal in line with subsequent broadcast channels in Europe. | What signal did Euro1080 later change to? | {
"text": [
"DVB-S2"
],
"answer_start": [
200
]
} |
56fa84e7f34c681400b0c0dd | High-definition_television | Despite delays in some countries, the number of European HD channels and viewers has risen steadily since the first HDTV broadcasts, with SES's annual Satellite Monitor market survey for 2010 reporting more than 200 commercial channels broadcasting in HD from Astra satellites, 185 million HD capable TVs sold in Europe ... | According to the 2010 Satellite Monitor market survey, how many HD capable TV's were sold in Europe? | {
"text": [
"185 million"
],
"answer_start": [
278
]
} |
56fa84e7f34c681400b0c0de | High-definition_television | Despite delays in some countries, the number of European HD channels and viewers has risen steadily since the first HDTV broadcasts, with SES's annual Satellite Monitor market survey for 2010 reporting more than 200 commercial channels broadcasting in HD from Astra satellites, 185 million HD capable TVs sold in Europe ... | According to the 2010 Satellite Monitor market survey, how many European households were watching HD broadcasts? | {
"text": [
"20 million"
],
"answer_start": [
353
]
} |
56fa84e7f34c681400b0c0df | High-definition_television | Despite delays in some countries, the number of European HD channels and viewers has risen steadily since the first HDTV broadcasts, with SES's annual Satellite Monitor market survey for 2010 reporting more than 200 commercial channels broadcasting in HD from Astra satellites, 185 million HD capable TVs sold in Europe ... | How many pounds were spent in Europe on HD capable TVs in 2010? | {
"text": [
"£60 million"
],
"answer_start": [
321
]
} |
56fa84e7f34c681400b0c0e0 | High-definition_television | Despite delays in some countries, the number of European HD channels and viewers has risen steadily since the first HDTV broadcasts, with SES's annual Satellite Monitor market survey for 2010 reporting more than 200 commercial channels broadcasting in HD from Astra satellites, 185 million HD capable TVs sold in Europe ... | What percentage of European digital satellite TV homes were watching HD broadcasts in 2010? | {
"text": [
"27%"
],
"answer_start": [
376
]
} |
56fa84e7f34c681400b0c0e1 | High-definition_television | Despite delays in some countries, the number of European HD channels and viewers has risen steadily since the first HDTV broadcasts, with SES's annual Satellite Monitor market survey for 2010 reporting more than 200 commercial channels broadcasting in HD from Astra satellites, 185 million HD capable TVs sold in Europe ... | The number of European HD channels and viewers has done what since the first HDTV broadcasts? | {
"text": [
"risen steadily"
],
"answer_start": [
85
]
} |
56fa85dd8f12f3190063016f | High-definition_television | In December 2009 the United Kingdom became the first European country to deploy high definition content using the new DVB-T2 transmission standard, as specified in the Digital TV Group (DTG) D-book, on digital terrestrial television. | Which European country first deployed HD content using the new DVB-T2 standard? | {
"text": [
"the United Kingdom"
],
"answer_start": [
17
]
} |
56fa85dd8f12f31900630170 | High-definition_television | In December 2009 the United Kingdom became the first European country to deploy high definition content using the new DVB-T2 transmission standard, as specified in the Digital TV Group (DTG) D-book, on digital terrestrial television. | When did the UK deploy HD content using the new DVB-T2 transmission standard? | {
"text": [
"December 2009"
],
"answer_start": [
3
]
} |
56fa85dd8f12f31900630171 | High-definition_television | In December 2009 the United Kingdom became the first European country to deploy high definition content using the new DVB-T2 transmission standard, as specified in the Digital TV Group (DTG) D-book, on digital terrestrial television. | What transmission standard did the UK start using in December 2009? | {
"text": [
"DVB-T2"
],
"answer_start": [
118
]
} |
56fa85dd8f12f31900630172 | High-definition_television | In December 2009 the United Kingdom became the first European country to deploy high definition content using the new DVB-T2 transmission standard, as specified in the Digital TV Group (DTG) D-book, on digital terrestrial television. | What does DTG stand for? | {
"text": [
"Digital TV Group"
],
"answer_start": [
168
]
} |
56fa88b8f34c681400b0c0e7 | High-definition_television | The Freeview HD service currently contains 10 HD channels (as of December 2013[update]) and was rolled out region by region across the UK in accordance with the digital switchover process, finally being completed in October 2012. However, Freeview HD is not the first HDTV service over digital terrestrial television in ... | How many HD channels did the Freeview HD service contain as of December 2013? | {
"text": [
"10"
],
"answer_start": [
43
]
} |
56fa88b8f34c681400b0c0e8 | High-definition_television | The Freeview HD service currently contains 10 HD channels (as of December 2013[update]) and was rolled out region by region across the UK in accordance with the digital switchover process, finally being completed in October 2012. However, Freeview HD is not the first HDTV service over digital terrestrial television in ... | When was the digital switchover process completed in the UK? | {
"text": [
"October 2012"
],
"answer_start": [
216
]
} |
56fa88b8f34c681400b0c0e9 | High-definition_television | The Freeview HD service currently contains 10 HD channels (as of December 2013[update]) and was rolled out region by region across the UK in accordance with the digital switchover process, finally being completed in October 2012. However, Freeview HD is not the first HDTV service over digital terrestrial television in ... | Which service contains 10 HD channels and finished its roll out in October 2012? | {
"text": [
"Freeview HD"
],
"answer_start": [
4
]
} |
56fa88b8f34c681400b0c0ea | High-definition_television | The Freeview HD service currently contains 10 HD channels (as of December 2013[update]) and was rolled out region by region across the UK in accordance with the digital switchover process, finally being completed in October 2012. However, Freeview HD is not the first HDTV service over digital terrestrial television in ... | How was the Freeview HD service rolled out in the UK? | {
"text": [
"region by region"
],
"answer_start": [
107
]
} |
56fa8b328f12f31900630177 | High-definition_television | If all three parameters are used, they are specified in the following form: [frame size][scanning system][frame or field rate] or [frame size]/[frame or field rate][scanning system].[citation needed] Often, frame size or frame rate can be dropped if its value is implied from context. In this case, the remaining numeric... | What are the three HDTV parameters? | {
"text": [
"[frame size][scanning system][frame or field rate]"
],
"answer_start": [
76
]
} |
56fa8b328f12f31900630178 | High-definition_television | If all three parameters are used, they are specified in the following form: [frame size][scanning system][frame or field rate] or [frame size]/[frame or field rate][scanning system].[citation needed] Often, frame size or frame rate can be dropped if its value is implied from context. In this case, the remaining numeric... | Which two parameters can be dropped if its value is implied from context? | {
"text": [
"frame size or frame rate"
],
"answer_start": [
207
]
} |
56fa8b328f12f31900630179 | High-definition_television | If all three parameters are used, they are specified in the following form: [frame size][scanning system][frame or field rate] or [frame size]/[frame or field rate][scanning system].[citation needed] Often, frame size or frame rate can be dropped if its value is implied from context. In this case, the remaining numeric... | When can the frame size or frame rate parameter specification be dropped? | {
"text": [
"if its value is implied from context"
],
"answer_start": [
247
]
} |
56fa8b328f12f3190063017a | High-definition_television | If all three parameters are used, they are specified in the following form: [frame size][scanning system][frame or field rate] or [frame size]/[frame or field rate][scanning system].[citation needed] Often, frame size or frame rate can be dropped if its value is implied from context. In this case, the remaining numeric... | When a parameter is dropped, the remaining numeric parameter is specified first, followed by what? | {
"text": [
"the scanning system"
],
"answer_start": [
363
]
} |
56fa8e4af34c681400b0c0ef | High-definition_television | For example, 1920×1080p25 identifies progressive scanning format with 25 frames per second, each frame being 1,920 pixels wide and 1,080 pixels high. The 1080i25 or 1080i50 notation identifies interlaced scanning format with 25 frames (50 fields) per second, each frame being 1,920 pixels wide and 1,080 pixels high. The... | What size is each 1920x1080p25 frame? | {
"text": [
"1,920 pixels wide and 1,080 pixels high"
],
"answer_start": [
109
]
} |
56fa8e4af34c681400b0c0f0 | High-definition_television | For example, 1920×1080p25 identifies progressive scanning format with 25 frames per second, each frame being 1,920 pixels wide and 1,080 pixels high. The 1080i25 or 1080i50 notation identifies interlaced scanning format with 25 frames (50 fields) per second, each frame being 1,920 pixels wide and 1,080 pixels high. The... | The 1920x1080p25 notion identifies progressive scanning format with how many frames per second? | {
"text": [
"25"
],
"answer_start": [
70
]
} |
56fa8e4af34c681400b0c0f1 | High-definition_television | For example, 1920×1080p25 identifies progressive scanning format with 25 frames per second, each frame being 1,920 pixels wide and 1,080 pixels high. The 1080i25 or 1080i50 notation identifies interlaced scanning format with 25 frames (50 fields) per second, each frame being 1,920 pixels wide and 1,080 pixels high. The... | The 1080i25 or 1080i50 notion identifies interlaced scanning format with how many frames per second? | {
"text": [
"25"
],
"answer_start": [
225
]
} |
56fa8e4af34c681400b0c0f2 | High-definition_television | For example, 1920×1080p25 identifies progressive scanning format with 25 frames per second, each frame being 1,920 pixels wide and 1,080 pixels high. The 1080i25 or 1080i50 notation identifies interlaced scanning format with 25 frames (50 fields) per second, each frame being 1,920 pixels wide and 1,080 pixels high. The... | The 1080i30 or 1080i60 notion identifies interlaced scanning format with how many frames per second? | {
"text": [
"30"
],
"answer_start": [
392
]
} |
56fa8e4af34c681400b0c0f3 | High-definition_television | For example, 1920×1080p25 identifies progressive scanning format with 25 frames per second, each frame being 1,920 pixels wide and 1,080 pixels high. The 1080i25 or 1080i50 notation identifies interlaced scanning format with 25 frames (50 fields) per second, each frame being 1,920 pixels wide and 1,080 pixels high. The... | The 720p60 notion identifies progressive scanning format with how many frames per second? | {
"text": [
"60"
],
"answer_start": [
548
]
} |
56fa97178f12f3190063017f | High-definition_television | 50 Hz systems support three scanning rates: 50i, 25p and 50p. 60 Hz systems support a much wider set of frame rates: 59.94i, 60i, 23.976p, 24p, 29.97p, 30p, 59.94p and 60p. In the days of standard definition television, the fractional rates were often rounded up to whole numbers, e.g. 23.976p was often called 24p, or 5... | What three scanning rates do 50 Hz systems support? | {
"text": [
"50i, 25p and 50p"
],
"answer_start": [
44
]
} |
56fa97178f12f31900630180 | High-definition_television | 50 Hz systems support three scanning rates: 50i, 25p and 50p. 60 Hz systems support a much wider set of frame rates: 59.94i, 60i, 23.976p, 24p, 29.97p, 30p, 59.94p and 60p. In the days of standard definition television, the fractional rates were often rounded up to whole numbers, e.g. 23.976p was often called 24p, or 5... | Which system suports 59.94i, 60i, 23.976p, 24p, 29.97p, 30p, 59.94p, and 60p | {
"text": [
"60 Hz"
],
"answer_start": [
62
]
} |
56fa97178f12f31900630181 | High-definition_television | 50 Hz systems support three scanning rates: 50i, 25p and 50p. 60 Hz systems support a much wider set of frame rates: 59.94i, 60i, 23.976p, 24p, 29.97p, 30p, 59.94p and 60p. In the days of standard definition television, the fractional rates were often rounded up to whole numbers, e.g. 23.976p was often called 24p, or 5... | SD television fractional rates were often rounded to what? | {
"text": [
"whole numbers"
],
"answer_start": [
266
]
} |
56fa97178f12f31900630182 | High-definition_television | 50 Hz systems support three scanning rates: 50i, 25p and 50p. 60 Hz systems support a much wider set of frame rates: 59.94i, 60i, 23.976p, 24p, 29.97p, 30p, 59.94p and 60p. In the days of standard definition television, the fractional rates were often rounded up to whole numbers, e.g. 23.976p was often called 24p, or 5... | Strict notation is required with HD fractional rates to avoid what? | {
"text": [
"ambiguity"
],
"answer_start": [
500
]
} |
56fa995df34c681400b0c0f9 | High-definition_television | For the commercial naming of a product, the frame rate is often dropped and is implied from context (e.g., a 1080i television set). A frame rate can also be specified without a resolution. For example, 24p means 24 progressive scan frames per second, and 50i means 25 interlaced frames per second. | What is usually dropped for the commercial naming of an HDTV product? | {
"text": [
"the frame rate"
],
"answer_start": [
40
]
} |
56fa995df34c681400b0c0fa | High-definition_television | For the commercial naming of a product, the frame rate is often dropped and is implied from context (e.g., a 1080i television set). A frame rate can also be specified without a resolution. For example, 24p means 24 progressive scan frames per second, and 50i means 25 interlaced frames per second. | What does 24p mean? | {
"text": [
"24 progressive scan frames per second"
],
"answer_start": [
212
]
} |
56fa995df34c681400b0c0fb | High-definition_television | For the commercial naming of a product, the frame rate is often dropped and is implied from context (e.g., a 1080i television set). A frame rate can also be specified without a resolution. For example, 24p means 24 progressive scan frames per second, and 50i means 25 interlaced frames per second. | What does 50i mean? | {
"text": [
"25 interlaced frames per second"
],
"answer_start": [
265
]
} |
56fa995df34c681400b0c0fc | High-definition_television | For the commercial naming of a product, the frame rate is often dropped and is implied from context (e.g., a 1080i television set). A frame rate can also be specified without a resolution. For example, 24p means 24 progressive scan frames per second, and 50i means 25 interlaced frames per second. | When naming a commercial HDTV product, a frame rate can be specified without what? | {
"text": [
"a resolution"
],
"answer_start": [
175
]
} |
56fa9afa8f12f31900630187 | High-definition_television | There is no single standard for HDTV color support. Colors are typically broadcast using a (10-bits per channel) YUV color space but, depending on the underlying image generating technologies of the receiver, are then subsequently converted to a RGB color space using standardized algorithms. When transmitted directly t... | Is there a single standard for HDTV color support? | {
"text": [
"no"
],
"answer_start": [
9
]
} |
56fa9afa8f12f31900630188 | High-definition_television | There is no single standard for HDTV color support. Colors are typically broadcast using a (10-bits per channel) YUV color space but, depending on the underlying image generating technologies of the receiver, are then subsequently converted to a RGB color space using standardized algorithms. When transmitted directly t... | Before being converted to RGB, colors are ususally broadcasted using what color space? | {
"text": [
"YUV"
],
"answer_start": [
113
]
} |
56fa9afa8f12f31900630189 | High-definition_television | There is no single standard for HDTV color support. Colors are typically broadcast using a (10-bits per channel) YUV color space but, depending on the underlying image generating technologies of the receiver, are then subsequently converted to a RGB color space using standardized algorithms. When transmitted directly t... | Colors are typically broadcast using YUV and then converted to what? | {
"text": [
"a RGB color space"
],
"answer_start": [
244
]
} |
56fa9afa8f12f3190063018a | High-definition_television | There is no single standard for HDTV color support. Colors are typically broadcast using a (10-bits per channel) YUV color space but, depending on the underlying image generating technologies of the receiver, are then subsequently converted to a RGB color space using standardized algorithms. When transmitted directly t... | When transmitted over the internet, colors are typically to what? | {
"text": [
"8-bit RGB channels"
],
"answer_start": [
383
]
} |
56fa9f9df34c681400b0c101 | High-definition_television | At a minimum, HDTV has twice the linear resolution of standard-definition television (SDTV), thus showing greater detail than either analog television or regular DVD. The technical standards for broadcasting HDTV also handle the 16:9 aspect ratio images without using letterboxing or anamorphic stretching, thus increasi... | At least how many times more linear resolution does HDTV have over SDTV? | {
"text": [
"twice"
],
"answer_start": [
23
]
} |
56fa9f9df34c681400b0c102 | High-definition_television | At a minimum, HDTV has twice the linear resolution of standard-definition television (SDTV), thus showing greater detail than either analog television or regular DVD. The technical standards for broadcasting HDTV also handle the 16:9 aspect ratio images without using letterboxing or anamorphic stretching, thus increasi... | HDTV increases the effective image resolution by not using what? | {
"text": [
"letterboxing or anamorphic stretching"
],
"answer_start": [
268
]
} |
56fa9f9df34c681400b0c103 | High-definition_television | At a minimum, HDTV has twice the linear resolution of standard-definition television (SDTV), thus showing greater detail than either analog television or regular DVD. The technical standards for broadcasting HDTV also handle the 16:9 aspect ratio images without using letterboxing or anamorphic stretching, thus increasi... | What does SDTV stand for? | {
"text": [
"standard-definition television"
],
"answer_start": [
54
]
} |
56fa9f9df34c681400b0c104 | High-definition_television | At a minimum, HDTV has twice the linear resolution of standard-definition television (SDTV), thus showing greater detail than either analog television or regular DVD. The technical standards for broadcasting HDTV also handle the 16:9 aspect ratio images without using letterboxing or anamorphic stretching, thus increasi... | HDTV handles what aspect ratio without using letterboxing or anamorphic stretching? | {
"text": [
"16:9"
],
"answer_start": [
229
]
} |
56faa8ff8f12f31900630191 | High-definition_television | A very high resolution source may require more bandwidth than available in order to be transmitted without loss of fidelity. The lossy compression that is used in all digital HDTV storage and transmission systems will distort the received picture, when compared to the uncompressed source. | If more bandwith is required than is available, a very high resolution source my not be able to transmitted without loss of what? | {
"text": [
"fidelity"
],
"answer_start": [
115
]
} |
56faa8ff8f12f31900630192 | High-definition_television | A very high resolution source may require more bandwidth than available in order to be transmitted without loss of fidelity. The lossy compression that is used in all digital HDTV storage and transmission systems will distort the received picture, when compared to the uncompressed source. | The compression used in all HDTV storage and transmission systems will do what if resolution is too high? | {
"text": [
"distort the received picture"
],
"answer_start": [
218
]
} |
56faa8ff8f12f31900630193 | High-definition_television | A very high resolution source may require more bandwidth than available in order to be transmitted without loss of fidelity. The lossy compression that is used in all digital HDTV storage and transmission systems will distort the received picture, when compared to the uncompressed source. | A very high resolution source may require more of what? | {
"text": [
"bandwidth"
],
"answer_start": [
47
]
} |
56faaa04f34c681400b0c10a | High-definition_television | The optimum format for a broadcast depends upon the type of videographic recording medium used and the image's characteristics. For best fidelity to the source the transmitted field ratio, lines, and frame rate should match those of the source. | For best fidelity to the source, what three things should match the source? | {
"text": [
"transmitted field ratio, lines, and frame rate"
],
"answer_start": [
164
]
} |
56faaa04f34c681400b0c10b | High-definition_television | The optimum format for a broadcast depends upon the type of videographic recording medium used and the image's characteristics. For best fidelity to the source the transmitted field ratio, lines, and frame rate should match those of the source. | For best fidelity to the source, the transmitted field ratio, lines, and frame rate should match what? | {
"text": [
"those of the source"
],
"answer_start": [
224
]
} |
56faaa04f34c681400b0c10c | High-definition_television | The optimum format for a broadcast depends upon the type of videographic recording medium used and the image's characteristics. For best fidelity to the source the transmitted field ratio, lines, and frame rate should match those of the source. | The type of videographic recording medium used and the image's characteristics determine what? | {
"text": [
"The optimum format for a broadcast"
],
"answer_start": [
0
]
} |
56faaac38f12f31900630197 | High-definition_television | PAL, SECAM and NTSC frame rates technically apply only to analogue standard definition television, not to digital or high definition broadcasts. However, with the roll out of digital broadcasting, and later HDTV broadcasting, countries retained their heritage systems. HDTV in former PAL and SECAM countries operates at ... | PAL, SECAM, and NTSC frame rates apply to what definition televisions? | {
"text": [
"analogue standard"
],
"answer_start": [
58
]
} |
56faaac38f12f31900630198 | High-definition_television | PAL, SECAM and NTSC frame rates technically apply only to analogue standard definition television, not to digital or high definition broadcasts. However, with the roll out of digital broadcasting, and later HDTV broadcasting, countries retained their heritage systems. HDTV in former PAL and SECAM countries operates at ... | PAL, SECAM, and NTSC frame rates do not apply to what broadcasts? | {
"text": [
"digital or high definition"
],
"answer_start": [
106
]
} |
56faaac38f12f31900630199 | High-definition_television | PAL, SECAM and NTSC frame rates technically apply only to analogue standard definition television, not to digital or high definition broadcasts. However, with the roll out of digital broadcasting, and later HDTV broadcasting, countries retained their heritage systems. HDTV in former PAL and SECAM countries operates at ... | In former PAL and SECAM countries, what frame rate does HDTV operate at? | {
"text": [
"25/50 Hz"
],
"answer_start": [
336
]
} |
56faaac38f12f3190063019a | High-definition_television | PAL, SECAM and NTSC frame rates technically apply only to analogue standard definition television, not to digital or high definition broadcasts. However, with the roll out of digital broadcasting, and later HDTV broadcasting, countries retained their heritage systems. HDTV in former PAL and SECAM countries operates at ... | In former NTSC countries, what frame rate does HDTV operate at? | {
"text": [
"30/60 Hz"
],
"answer_start": [
394
]
} |
56faae57f34c681400b0c111 | High-definition_television | Standard 35mm photographic film used for cinema projection has a much higher image resolution than HDTV systems, and is exposed and projected at a rate of 24 frames per second (frame/s). To be shown on standard television, in PAL-system countries, cinema film is scanned at the TV rate of 25 frame/s, causing a speedup o... | At what rate is standard 35mm photographic film exposed and projected? | {
"text": [
"24 frames per second"
],
"answer_start": [
155
]
} |
56faae57f34c681400b0c112 | High-definition_television | Standard 35mm photographic film used for cinema projection has a much higher image resolution than HDTV systems, and is exposed and projected at a rate of 24 frames per second (frame/s). To be shown on standard television, in PAL-system countries, cinema film is scanned at the TV rate of 25 frame/s, causing a speedup o... | To be shown on SDTV in PAL-system countries, at what rate is cinema film scanned? | {
"text": [
"25 frame/s"
],
"answer_start": [
289
]
} |
56faae57f34c681400b0c113 | High-definition_television | Standard 35mm photographic film used for cinema projection has a much higher image resolution than HDTV systems, and is exposed and projected at a rate of 24 frames per second (frame/s). To be shown on standard television, in PAL-system countries, cinema film is scanned at the TV rate of 25 frame/s, causing a speedup o... | The technique in which with successive pair of film frames, one is held for three video fields, and the next is held for two, is called what? | {
"text": [
"3:2 Pulldown"
],
"answer_start": [
560
]
} |
56faae57f34c681400b0c114 | High-definition_television | Standard 35mm photographic film used for cinema projection has a much higher image resolution than HDTV systems, and is exposed and projected at a rate of 24 frames per second (frame/s). To be shown on standard television, in PAL-system countries, cinema film is scanned at the TV rate of 25 frame/s, causing a speedup o... | The 3:2 Pulldown techniques gives what total time for two frames? | {
"text": [
"1/12 of a second"
],
"answer_start": [
774
]
} |
56faae57f34c681400b0c115 | High-definition_television | Standard 35mm photographic film used for cinema projection has a much higher image resolution than HDTV systems, and is exposed and projected at a rate of 24 frames per second (frame/s). To be shown on standard television, in PAL-system countries, cinema film is scanned at the TV rate of 25 frame/s, causing a speedup o... | What is achieved by the 3:2 Pulldown technique producing a total time of 1/12 of a second for two frames? | {
"text": [
"the correct average film frame rate"
],
"answer_start": [
810
]
} |
56fab555f34c681400b0c11b | High-definition_television | Non-cinematic HDTV video recordings intended for broadcast are typically recorded either in 720p or 1080i format as determined by the broadcaster. 720p is commonly used for Internet distribution of high-definition video, because most computer monitors operate in progressive-scan mode. 720p also imposes less strenuous s... | What two formats are typically used to recorde non-cinematic HDTV video intended for broadcast? | {
"text": [
"720p or 1080i"
],
"answer_start": [
92
]
} |
56fab555f34c681400b0c11c | High-definition_television | Non-cinematic HDTV video recordings intended for broadcast are typically recorded either in 720p or 1080i format as determined by the broadcaster. 720p is commonly used for Internet distribution of high-definition video, because most computer monitors operate in progressive-scan mode. 720p also imposes less strenuous s... | Which format is typically used for internet distribution of HD video? | {
"text": [
"720p"
],
"answer_start": [
147
]
} |
56fab555f34c681400b0c11d | High-definition_television | Non-cinematic HDTV video recordings intended for broadcast are typically recorded either in 720p or 1080i format as determined by the broadcaster. 720p is commonly used for Internet distribution of high-definition video, because most computer monitors operate in progressive-scan mode. 720p also imposes less strenuous s... | Most computer monitors operate in what mode? | {
"text": [
"progressive-scan"
],
"answer_start": [
263
]
} |
56fab555f34c681400b0c11e | High-definition_television | Non-cinematic HDTV video recordings intended for broadcast are typically recorded either in 720p or 1080i format as determined by the broadcaster. 720p is commonly used for Internet distribution of high-definition video, because most computer monitors operate in progressive-scan mode. 720p also imposes less strenuous s... | 1080i, 1080p, and 720p are often used on what kind of disc. | {
"text": [
"Blu-ray"
],
"answer_start": [
451
]
} |
56fac6d48f12f3190063019f | High-definition_television | In the US, residents in the line of sight of television station broadcast antennas can receive free, over the air programming with a television set with an ATSC tuner (most sets sold since 2009 have this). This is achieved with a TV aerial, just as it has been since the 1940s except now the major network signals are br... | In the US, what kind of tuner is needed for residents to receive free, over the air programming? | {
"text": [
"ATSC"
],
"answer_start": [
156
]
} |
56fac6d48f12f319006301a0 | High-definition_television | In the US, residents in the line of sight of television station broadcast antennas can receive free, over the air programming with a television set with an ATSC tuner (most sets sold since 2009 have this). This is achieved with a TV aerial, just as it has been since the 1940s except now the major network signals are br... | Laws regarding antennas were upated before what? | {
"text": [
"the change to digital terrestrial broadcasts"
],
"answer_start": [
633
]
} |
56fac6d48f12f319006301a1 | High-definition_television | In the US, residents in the line of sight of television station broadcast antennas can receive free, over the air programming with a television set with an ATSC tuner (most sets sold since 2009 have this). This is achieved with a TV aerial, just as it has been since the 1940s except now the major network signals are br... | Who do these laws prohibit from banning the installation of antennas? | {
"text": [
"home owners' associations and city government"
],
"answer_start": [
703
]
} |
56fac6d48f12f319006301a2 | High-definition_television | In the US, residents in the line of sight of television station broadcast antennas can receive free, over the air programming with a television set with an ATSC tuner (most sets sold since 2009 have this). This is achieved with a TV aerial, just as it has been since the 1940s except now the major network signals are br... | Laws about antennas keep home owners' associations and city government from banning what? | {
"text": [
"the installation of antennas"
],
"answer_start": [
762
]
} |
56fac6d48f12f319006301a3 | High-definition_television | In the US, residents in the line of sight of television station broadcast antennas can receive free, over the air programming with a television set with an ATSC tuner (most sets sold since 2009 have this). This is achieved with a TV aerial, just as it has been since the 1940s except now the major network signals are br... | Most television sets sold since what year have an ATSC tuner? | {
"text": [
"2009"
],
"answer_start": [
189
]
} |
56fac7ddf34c681400b0c123 | High-definition_television | Additionally, cable-ready TV sets can display HD content without using an external box. They have a QAM tuner built-in and/or a card slot for inserting a CableCARD. | HD content can be displayed by cable-ready TVs without using what? | {
"text": [
"an external box"
],
"answer_start": [
71
]
} |
56fac7ddf34c681400b0c124 | High-definition_television | Additionally, cable-ready TV sets can display HD content without using an external box. They have a QAM tuner built-in and/or a card slot for inserting a CableCARD. | Without using an external box, cable-ready TVs can display what? | {
"text": [
"HD content"
],
"answer_start": [
46
]
} |
56fac7ddf34c681400b0c126 | High-definition_television | Additionally, cable-ready TV sets can display HD content without using an external box. They have a QAM tuner built-in and/or a card slot for inserting a CableCARD. | What kind of built-in tuner will allow a cable-ready TV to display HD content without an external box? | {
"text": [
"QAM"
],
"answer_start": [
100
]
} |
56fac7ddf34c681400b0c127 | High-definition_television | Additionally, cable-ready TV sets can display HD content without using an external box. They have a QAM tuner built-in and/or a card slot for inserting a CableCARD. | What kind of card will allow a cable-ready TV to display HD content without an external box? | {
"text": [
"CableCARD"
],
"answer_start": [
154
]
} |
56fac8e58f12f319006301a9 | High-definition_television | High-definition image sources include terrestrial broadcast, direct broadcast satellite, digital cable, IPTV (including GoogleTV Roku boxes and AppleTV or built into "Smart Televisions"), Blu-ray video disc (BD), and internet downloads. | Roku and AppleTV are examples of what? | {
"text": [
"IPTV"
],
"answer_start": [
104
]
} |
56fac8e58f12f319006301aa | High-definition_television | High-definition image sources include terrestrial broadcast, direct broadcast satellite, digital cable, IPTV (including GoogleTV Roku boxes and AppleTV or built into "Smart Televisions"), Blu-ray video disc (BD), and internet downloads. | Internet downloads, Blu-ray videos, and Apple TV are examples of what? | {
"text": [
"High-definition image sources"
],
"answer_start": [
0
]
} |
56fac8e58f12f319006301ab | High-definition_television | High-definition image sources include terrestrial broadcast, direct broadcast satellite, digital cable, IPTV (including GoogleTV Roku boxes and AppleTV or built into "Smart Televisions"), Blu-ray video disc (BD), and internet downloads. | Terrestrial broadcast and direct broadcast satellite are examples of what? | {
"text": [
"High-definition image sources"
],
"answer_start": [
0
]
} |
56fac8e58f12f319006301ac | High-definition_television | High-definition image sources include terrestrial broadcast, direct broadcast satellite, digital cable, IPTV (including GoogleTV Roku boxes and AppleTV or built into "Smart Televisions"), Blu-ray video disc (BD), and internet downloads. | Digital cable and Roku are examples of what? | {
"text": [
"High-definition image sources"
],
"answer_start": [
0
]
} |
56faca31f34c681400b0c12d | High-definition_television | Sony's PlayStation 3 has extensive HD compatibility because of its built in Blu-ray disc based player, so does Microsoft's Xbox 360 with the addition of Netflix and Windows Media Center HTPC streaming capabilities, and the Zune marketplace where users can rent or purchase digital HD content. Recently, Nintendo released... | Why does the PlayStation 3 have extensive HD compatibility? | {
"text": [
"because of its built in Blu-ray disc based player"
],
"answer_start": [
52
]
} |
56faca31f34c681400b0c12f | High-definition_television | Sony's PlayStation 3 has extensive HD compatibility because of its built in Blu-ray disc based player, so does Microsoft's Xbox 360 with the addition of Netflix and Windows Media Center HTPC streaming capabilities, and the Zune marketplace where users can rent or purchase digital HD content. Recently, Nintendo released... | What high definition gaming platform did Nintendo recently release? | {
"text": [
"The Wii U"
],
"answer_start": [
372
]
} |
56facb5d8f12f319006301b1 | High-definition_television | HDTV can be recorded to D-VHS (Digital-VHS or Data-VHS), W-VHS (analog only), to an HDTV-capable digital video recorder (for example DirecTV's high-definition Digital video recorder, Sky HD's set-top box, Dish Network's VIP 622 or VIP 722 high-definition Digital video recorder receivers, or TiVo's Series 3 or HD record... | Sky HD's set-top box, TiVo's Series 3, and Dish Network's VIP 622 are examples of what? | {
"text": [
"an HDTV-capable digital video recorder"
],
"answer_start": [
81
]
} |
56facb5d8f12f319006301b3 | High-definition_television | HDTV can be recorded to D-VHS (Digital-VHS or Data-VHS), W-VHS (analog only), to an HDTV-capable digital video recorder (for example DirecTV's high-definition Digital video recorder, Sky HD's set-top box, Dish Network's VIP 622 or VIP 722 high-definition Digital video recorder receivers, or TiVo's Series 3 or HD record... | What restriction does W-VHS recordings have? | {
"text": [
"analog only"
],
"answer_start": [
64
]
} |
56facb5d8f12f319006301b4 | High-definition_television | HDTV can be recorded to D-VHS (Digital-VHS or Data-VHS), W-VHS (analog only), to an HDTV-capable digital video recorder (for example DirecTV's high-definition Digital video recorder, Sky HD's set-top box, Dish Network's VIP 622 or VIP 722 high-definition Digital video recorder receivers, or TiVo's Series 3 or HD record... | What does D-VHS stand for? | {
"text": [
"Digital-VHS or Data-VHS"
],
"answer_start": [
31
]
} |
56facca98f12f319006301b9 | High-definition_television | The massive amount of data storage required to archive uncompressed streams meant that inexpensive uncompressed storage options were not available to the consumer. In 2008, the Hauppauge 1212 Personal Video Recorder was introduced. This device accepts HD content through component video inputs and stores the content in ... | When was the Hauppauge 1212 Personal Video Recorder introduced? | {
"text": [
"2008"
],
"answer_start": [
167
]
} |
56facca98f12f319006301bc | High-definition_television | The massive amount of data storage required to archive uncompressed streams meant that inexpensive uncompressed storage options were not available to the consumer. In 2008, the Hauppauge 1212 Personal Video Recorder was introduced. This device accepts HD content through component video inputs and stores the content in ... | What uncompressed storage option was introduced in 2008? | {
"text": [
"the Hauppauge 1212 Personal Video Recorder"
],
"answer_start": [
173
]
} |
56facd2f8f12f319006301c1 | High-definition_television | Analog tape recorders with bandwidth capable of recording analog HD signals, such as W-VHS recorders, are no longer produced for the consumer market and are both expensive and scarce in the secondary market. | W-VHS recorders are capable of recording what kinds of signals? | {
"text": [
"analog HD"
],
"answer_start": [
58
]
} |
56facd2f8f12f319006301c2 | High-definition_television | Analog tape recorders with bandwidth capable of recording analog HD signals, such as W-VHS recorders, are no longer produced for the consumer market and are both expensive and scarce in the secondary market. | What kind of recorder is no longer produced for the consumer market? | {
"text": [
"Analog tape"
],
"answer_start": [
0
]
} |
56facd2f8f12f319006301c3 | High-definition_television | Analog tape recorders with bandwidth capable of recording analog HD signals, such as W-VHS recorders, are no longer produced for the consumer market and are both expensive and scarce in the secondary market. | In the secondary market, analog tape recorders are considered what? | {
"text": [
"expensive and scarce"
],
"answer_start": [
162
]
} |
56faceb3f34c681400b0c135 | High-definition_television | In the United States, as part of the FCC's plug and play agreement, cable companies are required to provide customers who rent HD set-top boxes with a set-top box with "functional" FireWire (IEEE 1394) on request. None of the direct broadcast satellite providers have offered this feature on any of their supported boxes... | Prior to 2004, what were US cable companies required to provide customers who rent HD set-top boxes? | {
"text": [
"a set-top box with \"functional\" FireWire (IEEE 1394) on request"
],
"answer_start": [
149
]
} |
56faceb3f34c681400b0c136 | High-definition_television | In the United States, as part of the FCC's plug and play agreement, cable companies are required to provide customers who rent HD set-top boxes with a set-top box with "functional" FireWire (IEEE 1394) on request. None of the direct broadcast satellite providers have offered this feature on any of their supported boxes... | When were boxes with "functional" FireWire no longer included in the FCC mandate? | {
"text": [
"July 2004"
],
"answer_start": [
362
]
} |
56faceb3f34c681400b0c137 | High-definition_television | In the United States, as part of the FCC's plug and play agreement, cable companies are required to provide customers who rent HD set-top boxes with a set-top box with "functional" FireWire (IEEE 1394) on request. None of the direct broadcast satellite providers have offered this feature on any of their supported boxes... | Content is now protected by what encryption? | {
"text": [
"5C"
],
"answer_start": [
473
]
} |
56f9e2819b226e1400dd15e8 | Wood | It has been used for thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers (which are strong in tension) embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or... | In addition to being used to build things, what has wood been used for over thousands of years? | {
"text": [
"fuel"
],
"answer_start": [
49
]
} |
56f9e2819b226e1400dd15e9 | Wood | It has been used for thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers (which are strong in tension) embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or... | What kind of strong fibers are part of the composite of wood? | {
"text": [
"cellulose"
],
"answer_start": [
136
]
} |
56f9e2819b226e1400dd15ea | Wood | It has been used for thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers (which are strong in tension) embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or... | What's the matrix in wood made up of? | {
"text": [
"lignin"
],
"answer_start": [
207
]
} |
56f9e2819b226e1400dd15eb | Wood | It has been used for thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers (which are strong in tension) embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or... | What one word describes the function wood provides to a tree or plant? | {
"text": [
"support"
],
"answer_start": [
482
]
} |
56f9e2819b226e1400dd15ec | Wood | It has been used for thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers (which are strong in tension) embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or... | What does wood convey to leaves, roots, and other tissues of a woody plant in addition to water? | {
"text": [
"nutrients"
],
"answer_start": [
592
]
} |
56f9e5219e9bad19000a0b4b | Wood | The Earth contains about 434 billion cubic meters of growing stock forest, 47% of which is commercial. As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 1991, approximately 3.5 cubic kilometers of wood were harvested. Dominant uses were ... | How many cubic meters of growing stock forest are there on the planet? | {
"text": [
"434 billion"
],
"answer_start": [
25
]
} |
56f9e5219e9bad19000a0b4c | Wood | The Earth contains about 434 billion cubic meters of growing stock forest, 47% of which is commercial. As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 1991, approximately 3.5 cubic kilometers of wood were harvested. Dominant uses were ... | What percentage of the Earth's stock forest is commercial? | {
"text": [
"47%"
],
"answer_start": [
75
]
} |
56f9e5219e9bad19000a0b4d | Wood | The Earth contains about 434 billion cubic meters of growing stock forest, 47% of which is commercial. As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 1991, approximately 3.5 cubic kilometers of wood were harvested. Dominant uses were ... | In addition to buildings, what is wood often used to make? | {
"text": [
"furniture"
],
"answer_start": [
324
]
} |
56f9e5219e9bad19000a0b4e | Wood | The Earth contains about 434 billion cubic meters of growing stock forest, 47% of which is commercial. As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 1991, approximately 3.5 cubic kilometers of wood were harvested. Dominant uses were ... | About how many cubic kilometers of the vast stock forest's wood were harvested in 1991? | {
"text": [
"3.5"
],
"answer_start": [
256
]
} |
56f9e5219e9bad19000a0b4f | Wood | The Earth contains about 434 billion cubic meters of growing stock forest, 47% of which is commercial. As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 1991, approximately 3.5 cubic kilometers of wood were harvested. Dominant uses were ... | In addition to being carbon neutral, what other adjective describes wood that makes it compelling as a renewable energy source? | {
"text": [
"abundant"
],
"answer_start": [
109
]
} |
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