id stringlengths 24 24 | title stringclasses 442
values | context stringlengths 151 3.71k | question stringlengths 12 270 | answers dict |
|---|---|---|---|---|
570616a075f01819005e7971 | MP3 | MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of m... | What kind of audio is the coding format for? | {
"answer_start": [
98
],
"text": [
"digital"
]
} |
570616a075f01819005e7972 | MP3 | MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of m... | Other than storage, what is the common audio format used for? | {
"answer_start": [
189
],
"text": [
"consumer audio streaming"
]
} |
570616a075f01819005e7973 | MP3 | MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of m... | What does MP3 use to format it's data? | {
"answer_start": [
133
],
"text": [
"lossy data compression"
]
} |
570616a075f01819005e7974 | MP3 | MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of m... | Where will MP3 files most commonly be found? | {
"answer_start": [
333
],
"text": [
"digital audio players"
]
} |
57061a1e75f01819005e7984 | MP3 | The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11... | What is the main goal aside from reducing the amount of data required to store the audio? | {
"answer_start": [
130
],
"text": [
"sound like a faithful reproduction"
]
} |
57061a1e75f01819005e7985 | MP3 | The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11... | What kind of compression is used? | {
"answer_start": [
345
],
"text": [
"created"
]
} |
57061a1e75f01819005e7986 | MP3 | The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11... | If a file is created using 128 kbit/s, what size is the file going to be compared to a CD? | {
"answer_start": [
316
],
"text": [
"1/11"
]
} |
57061a1e75f01819005e7987 | MP3 | The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11... | How many total bit/s would a CD have? | {
"answer_start": [
447
],
"text": [
"1,411,200"
]
} |
57061a1e75f01819005e7988 | MP3 | The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11... | How many total bit/s would an MP3 compressed at 128 kbit/s have? | {
"answer_start": [
494
],
"text": [
"128,000"
]
} |
57061b0f75f01819005e798e | MP3 | The compression works by reducing the accuracy of certain parts of a sound that are considered to be beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It uses psychoacoustic models to discard or reduce precision of components less audible to human hearing, ... | What does the compression target in the song? | {
"answer_start": [
38
],
"text": [
"accuracy"
]
} |
57061b0f75f01819005e798f | MP3 | The compression works by reducing the accuracy of certain parts of a sound that are considered to be beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It uses psychoacoustic models to discard or reduce precision of components less audible to human hearing, ... | The targetting focuses on what aspect that is beyond the ability of most people? | {
"answer_start": [
112
],
"text": [
"auditory resolution"
]
} |
57061b0f75f01819005e7990 | MP3 | The compression works by reducing the accuracy of certain parts of a sound that are considered to be beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It uses psychoacoustic models to discard or reduce precision of components less audible to human hearing, ... | What is this method commonly referred to as? | {
"answer_start": [
195
],
"text": [
"perceptual coding"
]
} |
57061b0f75f01819005e7991 | MP3 | The compression works by reducing the accuracy of certain parts of a sound that are considered to be beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It uses psychoacoustic models to discard or reduce precision of components less audible to human hearing, ... | What kind of model is used in this kind of compression? | {
"answer_start": [
222
],
"text": [
"psychoacoustic"
]
} |
57061b0f75f01819005e7992 | MP3 | The compression works by reducing the accuracy of certain parts of a sound that are considered to be beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It uses psychoacoustic models to discard or reduce precision of components less audible to human hearing, ... | These models ensure that the precision is reduced for the components that are what to human hearing? | {
"answer_start": [
289
],
"text": [
"less audible"
]
} |
57061bc675f01819005e7998 | MP3 | MP3 was designed by the Moving Picture Experts Group (MPEG) as part of its MPEG-1 standard and later extended in the MPEG-2 standard. The first subgroup for audio was formed by several teams of engineers at Fraunhofer IIS, University of Hannover, AT&T-Bell Labs, Thomson-Brandt, CCETT, and others. MPEG-1 Audio (MPEG-1 P... | Who designed MP3? | {
"answer_start": [
24
],
"text": [
"Moving Picture Experts Group"
]
} |
57061bc675f01819005e7999 | MP3 | MP3 was designed by the Moving Picture Experts Group (MPEG) as part of its MPEG-1 standard and later extended in the MPEG-2 standard. The first subgroup for audio was formed by several teams of engineers at Fraunhofer IIS, University of Hannover, AT&T-Bell Labs, Thomson-Brandt, CCETT, and others. MPEG-1 Audio (MPEG-1 P... | What was the first standard that this group had? | {
"answer_start": [
75
],
"text": [
"MPEG-1"
]
} |
57061bc675f01819005e799a | MP3 | MP3 was designed by the Moving Picture Experts Group (MPEG) as part of its MPEG-1 standard and later extended in the MPEG-2 standard. The first subgroup for audio was formed by several teams of engineers at Fraunhofer IIS, University of Hannover, AT&T-Bell Labs, Thomson-Brandt, CCETT, and others. MPEG-1 Audio (MPEG-1 P... | The first standard later developed into which standard? | {
"answer_start": [
117
],
"text": [
"MPEG-2"
]
} |
57061bc675f01819005e799b | MP3 | MP3 was designed by the Moving Picture Experts Group (MPEG) as part of its MPEG-1 standard and later extended in the MPEG-2 standard. The first subgroup for audio was formed by several teams of engineers at Fraunhofer IIS, University of Hannover, AT&T-Bell Labs, Thomson-Brandt, CCETT, and others. MPEG-1 Audio (MPEG-1 P... | When was the draft passed to have MPEG-1 Audio approved as a standard? | {
"answer_start": [
433
],
"text": [
"1991"
]
} |
57061bc675f01819005e799c | MP3 | MP3 was designed by the Moving Picture Experts Group (MPEG) as part of its MPEG-1 standard and later extended in the MPEG-2 standard. The first subgroup for audio was formed by several teams of engineers at Fraunhofer IIS, University of Hannover, AT&T-Bell Labs, Thomson-Brandt, CCETT, and others. MPEG-1 Audio (MPEG-1 P... | When was MPEG-2 Audio finally published? | {
"answer_start": [
613
],
"text": [
"1995"
]
} |
57061d0c75f01819005e79a2 | MP3 | The MP3 lossy audio data compression algorithm takes advantage of a perceptual limitation of human hearing called auditory masking. In 1894, the American physicist Alfred M. Mayer reported that a tone could be rendered inaudible by another tone of lower frequency. In 1959, Richard Ehmer described a complete set of audi... | What does the MP3 compression take advantage of? | {
"answer_start": [
68
],
"text": [
"perceptual limitation"
]
} |
57061d0c75f01819005e79a3 | MP3 | The MP3 lossy audio data compression algorithm takes advantage of a perceptual limitation of human hearing called auditory masking. In 1894, the American physicist Alfred M. Mayer reported that a tone could be rendered inaudible by another tone of lower frequency. In 1959, Richard Ehmer described a complete set of audi... | What is the limitation in human hearing referred to as? | {
"answer_start": [
114
],
"text": [
"auditory masking"
]
} |
57061d0c75f01819005e79a4 | MP3 | The MP3 lossy audio data compression algorithm takes advantage of a perceptual limitation of human hearing called auditory masking. In 1894, the American physicist Alfred M. Mayer reported that a tone could be rendered inaudible by another tone of lower frequency. In 1959, Richard Ehmer described a complete set of audi... | Who was the physicist to report that a tone could be rendered inaudible. | {
"answer_start": [
164
],
"text": [
"Alfred M. Mayer"
]
} |
57061d0c75f01819005e79a5 | MP3 | The MP3 lossy audio data compression algorithm takes advantage of a perceptual limitation of human hearing called auditory masking. In 1894, the American physicist Alfred M. Mayer reported that a tone could be rendered inaudible by another tone of lower frequency. In 1959, Richard Ehmer described a complete set of audi... | When were audio curves described by Richard Ehmer? | {
"answer_start": [
268
],
"text": [
"1959"
]
} |
57061d0c75f01819005e79a6 | MP3 | The MP3 lossy audio data compression algorithm takes advantage of a perceptual limitation of human hearing called auditory masking. In 1894, the American physicist Alfred M. Mayer reported that a tone could be rendered inaudible by another tone of lower frequency. In 1959, Richard Ehmer described a complete set of audi... | The initial work was aimed at determining critical ratios and what else? | {
"answer_start": [
590
],
"text": [
"critical bandwidths"
]
} |
57061e0f52bb8914006898c0 | MP3 | The psychoacoustic masking codec was first proposed in 1979, apparently independently, by Manfred R. Schroeder, et al. from Bell Telephone Laboratories, Inc. in Murray Hill, NJ, and M. A. Krasner both in the United States. Krasner was the first to publish and to produce hardware for speech (not usable as music bit comp... | What was first proposed in 1979? | {
"answer_start": [
0
],
"text": [
"The psychoacoustic masking codec"
]
} |
57061e0f52bb8914006898c1 | MP3 | The psychoacoustic masking codec was first proposed in 1979, apparently independently, by Manfred R. Schroeder, et al. from Bell Telephone Laboratories, Inc. in Murray Hill, NJ, and M. A. Krasner both in the United States. Krasner was the first to publish and to produce hardware for speech (not usable as music bit comp... | Which country were the researchers located in? | {
"answer_start": [
208
],
"text": [
"United States"
]
} |
57061e0f52bb8914006898c2 | MP3 | The psychoacoustic masking codec was first proposed in 1979, apparently independently, by Manfred R. Schroeder, et al. from Bell Telephone Laboratories, Inc. in Murray Hill, NJ, and M. A. Krasner both in the United States. Krasner was the first to publish and to produce hardware for speech (not usable as music bit comp... | Who was the first to produce hardware for speech? | {
"answer_start": [
223
],
"text": [
"Krasner"
]
} |
57061e0f52bb8914006898c3 | MP3 | The psychoacoustic masking codec was first proposed in 1979, apparently independently, by Manfred R. Schroeder, et al. from Bell Telephone Laboratories, Inc. in Murray Hill, NJ, and M. A. Krasner both in the United States. Krasner was the first to publish and to produce hardware for speech (not usable as music bit comp... | What does LPC stand for? | {
"answer_start": [
755
],
"text": [
"linear predictive coding"
]
} |
57061e0f52bb8914006898c4 | MP3 | The psychoacoustic masking codec was first proposed in 1979, apparently independently, by Manfred R. Schroeder, et al. from Bell Telephone Laboratories, Inc. in Murray Hill, NJ, and M. A. Krasner both in the United States. Krasner was the first to publish and to produce hardware for speech (not usable as music bit comp... | What was reported in IEEE's Journal on Selected Areas in Communications? | {
"answer_start": [
1098
],
"text": [
"audio compression algorithms"
]
} |
57061edc75f01819005e79ac | MP3 | The immediate predecessors of MP3 were "Optimum Coding in the Frequency Domain" (OCF), and Perceptual Transform Coding (PXFM). These two codecs, along with block-switching contributions from Thomson-Brandt, were merged into a codec called ASPEC, which was submitted to MPEG, and which won the quality competition, but th... | What does OCF stand for? | {
"answer_start": [
40
],
"text": [
"Optimum Coding in the Frequency Domain"
]
} |
57061edc75f01819005e79ad | MP3 | The immediate predecessors of MP3 were "Optimum Coding in the Frequency Domain" (OCF), and Perceptual Transform Coding (PXFM). These two codecs, along with block-switching contributions from Thomson-Brandt, were merged into a codec called ASPEC, which was submitted to MPEG, and which won the quality competition, but th... | What does PXFM stand for? | {
"answer_start": [
91
],
"text": [
"Perceptual Transform Coding"
]
} |
57061edc75f01819005e79ae | MP3 | The immediate predecessors of MP3 were "Optimum Coding in the Frequency Domain" (OCF), and Perceptual Transform Coding (PXFM). These two codecs, along with block-switching contributions from Thomson-Brandt, were merged into a codec called ASPEC, which was submitted to MPEG, and which won the quality competition, but th... | What was the name of the codec that OCF, PFXM and other contributes merged into? | {
"answer_start": [
239
],
"text": [
"ASPEC"
]
} |
57061edc75f01819005e79af | MP3 | The immediate predecessors of MP3 were "Optimum Coding in the Frequency Domain" (OCF), and Perceptual Transform Coding (PXFM). These two codecs, along with block-switching contributions from Thomson-Brandt, were merged into a codec called ASPEC, which was submitted to MPEG, and which won the quality competition, but th... | Which competition did ASPEC win? | {
"answer_start": [
293
],
"text": [
"quality"
]
} |
57061edc75f01819005e79b0 | MP3 | The immediate predecessors of MP3 were "Optimum Coding in the Frequency Domain" (OCF), and Perceptual Transform Coding (PXFM). These two codecs, along with block-switching contributions from Thomson-Brandt, were merged into a codec called ASPEC, which was submitted to MPEG, and which won the quality competition, but th... | What was the first practical implementation based on? | {
"answer_start": [
593
],
"text": [
"Motorola 56000 DSP chips"
]
} |
57061f8275f01819005e79b6 | MP3 | As a doctoral student at Germany's University of Erlangen-Nuremberg, Karlheinz Brandenburg began working on digital music compression in the early 1980s, focusing on how people perceive music. He completed his doctoral work in 1989. MP3 is directly descended from OCF and PXFM, representing the outcome of the collaborat... | What kind of student was Karlheinz Brandenburg? | {
"answer_start": [
5
],
"text": [
"doctoral"
]
} |
57061f8275f01819005e79b7 | MP3 | As a doctoral student at Germany's University of Erlangen-Nuremberg, Karlheinz Brandenburg began working on digital music compression in the early 1980s, focusing on how people perceive music. He completed his doctoral work in 1989. MP3 is directly descended from OCF and PXFM, representing the outcome of the collaborat... | When did Karlheinz start working on digitmal music compression? | {
"answer_start": [
141
],
"text": [
"early 1980s"
]
} |
57061f8275f01819005e79b8 | MP3 | As a doctoral student at Germany's University of Erlangen-Nuremberg, Karlheinz Brandenburg began working on digital music compression in the early 1980s, focusing on how people perceive music. He completed his doctoral work in 1989. MP3 is directly descended from OCF and PXFM, representing the outcome of the collaborat... | Where did Bradenburg become an assistant professor at? | {
"answer_start": [
635
],
"text": [
"Erlangen-Nuremberg"
]
} |
57061f8275f01819005e79b9 | MP3 | As a doctoral student at Germany's University of Erlangen-Nuremberg, Karlheinz Brandenburg began working on digital music compression in the early 1980s, focusing on how people perceive music. He completed his doctoral work in 1989. MP3 is directly descended from OCF and PXFM, representing the outcome of the collaborat... | Who did Brandenburg work with in music compression? | {
"answer_start": [
733
],
"text": [
"Fraunhofer Society"
]
} |
57061f8275f01819005e79ba | MP3 | As a doctoral student at Germany's University of Erlangen-Nuremberg, Karlheinz Brandenburg began working on digital music compression in the early 1980s, focusing on how people perceive music. He completed his doctoral work in 1989. MP3 is directly descended from OCF and PXFM, representing the outcome of the collaborat... | When did Brandenburg join the Fraunhofen Institute? | {
"answer_start": [
756
],
"text": [
"1993"
]
} |
5706202975f01819005e79ca | MP3 | The song "Tom's Diner" by Suzanne Vega was the first song used by Karlheinz Brandenburg to develop the MP3. Brandenburg adopted the song for testing purposes, listening to it again and again each time refining the scheme, making sure it did not adversely affect the subtlety of Vega's voice. | What was the name of the first song used to develop the MP3? | {
"answer_start": [
10
],
"text": [
"Tom's Diner"
]
} |
5706202975f01819005e79cb | MP3 | The song "Tom's Diner" by Suzanne Vega was the first song used by Karlheinz Brandenburg to develop the MP3. Brandenburg adopted the song for testing purposes, listening to it again and again each time refining the scheme, making sure it did not adversely affect the subtlety of Vega's voice. | Who was the artist of the first song used? | {
"answer_start": [
26
],
"text": [
"Suzanne Vega"
]
} |
5706202975f01819005e79cc | MP3 | The song "Tom's Diner" by Suzanne Vega was the first song used by Karlheinz Brandenburg to develop the MP3. Brandenburg adopted the song for testing purposes, listening to it again and again each time refining the scheme, making sure it did not adversely affect the subtlety of Vega's voice. | Who adjusted the song? | {
"answer_start": [
66
],
"text": [
"Karlheinz Brandenburg"
]
} |
5706202975f01819005e79cd | MP3 | The song "Tom's Diner" by Suzanne Vega was the first song used by Karlheinz Brandenburg to develop the MP3. Brandenburg adopted the song for testing purposes, listening to it again and again each time refining the scheme, making sure it did not adversely affect the subtlety of Vega's voice. | The song was listened to multiple times to try and refine what? | {
"answer_start": [
214
],
"text": [
"scheme"
]
} |
5706202975f01819005e79ce | MP3 | The song "Tom's Diner" by Suzanne Vega was the first song used by Karlheinz Brandenburg to develop the MP3. Brandenburg adopted the song for testing purposes, listening to it again and again each time refining the scheme, making sure it did not adversely affect the subtlety of Vega's voice. | What particular aspect of the artists voice was he trying to preserve? | {
"answer_start": [
266
],
"text": [
"subtlety"
]
} |
5706219a52bb8914006898d8 | MP3 | In 1991, there were only two proposals available that could be completely assessed for an MPEG audio standard: Musicam (Masking pattern adapted Universal Subband Integrated Coding And Multiplexing) and ASPEC (Adaptive Spectral Perceptual Entropy Coding). The Musicam technique, as proposed by Philips (the Netherlands), ... | How many proposals were available in 1991? | {
"answer_start": [
25
],
"text": [
"two"
]
} |
5706219a52bb8914006898d9 | MP3 | In 1991, there were only two proposals available that could be completely assessed for an MPEG audio standard: Musicam (Masking pattern adapted Universal Subband Integrated Coding And Multiplexing) and ASPEC (Adaptive Spectral Perceptual Entropy Coding). The Musicam technique, as proposed by Philips (the Netherlands), ... | Other than ASPEC what was another proposal? | {
"answer_start": [
111
],
"text": [
"Musicam"
]
} |
5706219a52bb8914006898da | MP3 | In 1991, there were only two proposals available that could be completely assessed for an MPEG audio standard: Musicam (Masking pattern adapted Universal Subband Integrated Coding And Multiplexing) and ASPEC (Adaptive Spectral Perceptual Entropy Coding). The Musicam technique, as proposed by Philips (the Netherlands), ... | The Musicam format was proposed by Philips, based in which country? | {
"answer_start": [
306
],
"text": [
"Netherlands"
]
} |
5706219a52bb8914006898db | MP3 | In 1991, there were only two proposals available that could be completely assessed for an MPEG audio standard: Musicam (Masking pattern adapted Universal Subband Integrated Coding And Multiplexing) and ASPEC (Adaptive Spectral Perceptual Entropy Coding). The Musicam technique, as proposed by Philips (the Netherlands), ... | Which other quality alongside simplicty was key in selecting this proposal? | {
"answer_start": [
415
],
"text": [
"error robustness"
]
} |
5706219a52bb8914006898dc | MP3 | In 1991, there were only two proposals available that could be completely assessed for an MPEG audio standard: Musicam (Masking pattern adapted Universal Subband Integrated Coding And Multiplexing) and ASPEC (Adaptive Spectral Perceptual Entropy Coding). The Musicam technique, as proposed by Philips (the Netherlands), ... | What was the Musican format based on? | {
"answer_start": [
564
],
"text": [
"sub-band coding"
]
} |
5706233475f01819005e79de | MP3 | Much of its technology and ideas were incorporated into the definition of ISO MPEG Audio Layer I and Layer II and the filter bank alone into Layer III (MP3) format as part of the computationally inefficient hybrid filter bank. Under the chairmanship of Professor Musmann (University of Hannover) the editing of the stand... | What was only incorporated into Layer III and not Layers I or II? | {
"answer_start": [
118
],
"text": [
"filter bank"
]
} |
5706233475f01819005e79df | MP3 | Much of its technology and ideas were incorporated into the definition of ISO MPEG Audio Layer I and Layer II and the filter bank alone into Layer III (MP3) format as part of the computationally inefficient hybrid filter bank. Under the chairmanship of Professor Musmann (University of Hannover) the editing of the stand... | Who was the chair that oversaw the editing of the standard? | {
"answer_start": [
253
],
"text": [
"Professor Musmann"
]
} |
5706233475f01819005e79e0 | MP3 | Much of its technology and ideas were incorporated into the definition of ISO MPEG Audio Layer I and Layer II and the filter bank alone into Layer III (MP3) format as part of the computationally inefficient hybrid filter bank. Under the chairmanship of Professor Musmann (University of Hannover) the editing of the stand... | Who's responsibility was it to edit the standard for Layer I? | {
"answer_start": [
363
],
"text": [
"Leon van de Kerkhof"
]
} |
5706233475f01819005e79e1 | MP3 | Much of its technology and ideas were incorporated into the definition of ISO MPEG Audio Layer I and Layer II and the filter bank alone into Layer III (MP3) format as part of the computationally inefficient hybrid filter bank. Under the chairmanship of Professor Musmann (University of Hannover) the editing of the stand... | Who's responsibility was it to edit the standard for Layer II? | {
"answer_start": [
397
],
"text": [
"Gerhard Stoll"
]
} |
570623ba75f01819005e79e6 | MP3 | ASPEC was the joint proposal of AT&T Bell Laboratories, Thomson Consumer Electronics, Fraunhofer Society and CNET. It provided the highest coding efficiency. | What was the name given to the proposal? | {
"answer_start": [
0
],
"text": [
"ASPEC"
]
} |
570623ba75f01819005e79e7 | MP3 | ASPEC was the joint proposal of AT&T Bell Laboratories, Thomson Consumer Electronics, Fraunhofer Society and CNET. It provided the highest coding efficiency. | What did the joint proposal provide? | {
"answer_start": [
127
],
"text": [
"the highest coding efficiency"
]
} |
570623ba75f01819005e79e8 | MP3 | ASPEC was the joint proposal of AT&T Bell Laboratories, Thomson Consumer Electronics, Fraunhofer Society and CNET. It provided the highest coding efficiency. | Other than Thomson Consumer Electronics, Fraunhofer Society and CNET, who else was a part of the joint proposal? | {
"answer_start": [
32
],
"text": [
"AT&T Bell Laboratories"
]
} |
570624f252bb8914006898f7 | MP3 | A working group consisting of Leon van de Kerkhof (The Netherlands), Gerhard Stoll (Germany), Leonardo Chiariglione (Italy), Yves-François Dehery (France), Karlheinz Brandenburg (Germany) and James D. Johnston (USA) took ideas from ASPEC, integrated the filter bank from Layer 2, added some of their own ideas and create... | What did the working group integrate their ideas with? | {
"answer_start": [
254
],
"text": [
"filter bank"
]
} |
570624f252bb8914006898f8 | MP3 | A working group consisting of Leon van de Kerkhof (The Netherlands), Gerhard Stoll (Germany), Leonardo Chiariglione (Italy), Yves-François Dehery (France), Karlheinz Brandenburg (Germany) and James D. Johnston (USA) took ideas from ASPEC, integrated the filter bank from Layer 2, added some of their own ideas and create... | Where was the filter bank taken from? | {
"answer_start": [
271
],
"text": [
"Layer 2"
]
} |
570624f252bb8914006898f6 | MP3 | A working group consisting of Leon van de Kerkhof (The Netherlands), Gerhard Stoll (Germany), Leonardo Chiariglione (Italy), Yves-François Dehery (France), Karlheinz Brandenburg (Germany) and James D. Johnston (USA) took ideas from ASPEC, integrated the filter bank from Layer 2, added some of their own ideas and create... | What did the working group take ideas from? | {
"answer_start": [
232
],
"text": [
"ASPEC"
]
} |
570624f252bb8914006898f9 | MP3 | A working group consisting of Leon van de Kerkhof (The Netherlands), Gerhard Stoll (Germany), Leonardo Chiariglione (Italy), Yves-François Dehery (France), Karlheinz Brandenburg (Germany) and James D. Johnston (USA) took ideas from ASPEC, integrated the filter bank from Layer 2, added some of their own ideas and create... | What did the working group eventually create? | {
"answer_start": [
322
],
"text": [
"MP3"
]
} |
570624f252bb8914006898fa | MP3 | A working group consisting of Leon van de Kerkhof (The Netherlands), Gerhard Stoll (Germany), Leonardo Chiariglione (Italy), Yves-François Dehery (France), Karlheinz Brandenburg (Germany) and James D. Johnston (USA) took ideas from ASPEC, integrated the filter bank from Layer 2, added some of their own ideas and create... | What quality were they hoping to match at 128 kbit/s? | {
"answer_start": [
391
],
"text": [
"MP2 at 192 kbit/s"
]
} |
5706254b75f01819005e79ec | MP3 | All algorithms for MPEG-1 Audio Layer I, II and III were approved in 1991 and finalized in 1992 as part of MPEG-1, the first standard suite by MPEG, which resulted in the international standard ISO/IEC 11172-3 (a.k.a. MPEG-1 Audio or MPEG-1 Part 3), published in 1993. | When were the algorithms approved? | {
"answer_start": [
69
],
"text": [
"1991"
]
} |
5706254b75f01819005e79ed | MP3 | All algorithms for MPEG-1 Audio Layer I, II and III were approved in 1991 and finalized in 1992 as part of MPEG-1, the first standard suite by MPEG, which resulted in the international standard ISO/IEC 11172-3 (a.k.a. MPEG-1 Audio or MPEG-1 Part 3), published in 1993. | When were the approved algorithms finalized? | {
"answer_start": [
91
],
"text": [
"1992"
]
} |
5706254b75f01819005e79ee | MP3 | All algorithms for MPEG-1 Audio Layer I, II and III were approved in 1991 and finalized in 1992 as part of MPEG-1, the first standard suite by MPEG, which resulted in the international standard ISO/IEC 11172-3 (a.k.a. MPEG-1 Audio or MPEG-1 Part 3), published in 1993. | What was the first started suite by MPEG? | {
"answer_start": [
107
],
"text": [
"MPEG-1"
]
} |
5706254b75f01819005e79ef | MP3 | All algorithms for MPEG-1 Audio Layer I, II and III were approved in 1991 and finalized in 1992 as part of MPEG-1, the first standard suite by MPEG, which resulted in the international standard ISO/IEC 11172-3 (a.k.a. MPEG-1 Audio or MPEG-1 Part 3), published in 1993. | What was the official name of the internation standard? | {
"answer_start": [
194
],
"text": [
"ISO/IEC 11172-3"
]
} |
5706254b75f01819005e79f0 | MP3 | All algorithms for MPEG-1 Audio Layer I, II and III were approved in 1991 and finalized in 1992 as part of MPEG-1, the first standard suite by MPEG, which resulted in the international standard ISO/IEC 11172-3 (a.k.a. MPEG-1 Audio or MPEG-1 Part 3), published in 1993. | When was the international standard published? | {
"answer_start": [
263
],
"text": [
"1993"
]
} |
5706262d52bb891400689900 | MP3 | Further work on MPEG audio was finalized in 1994 as part of the second suite of MPEG standards, MPEG-2, more formally known as international standard ISO/IEC 13818-3 (a.k.a. MPEG-2 Part 3 or backwards compatible MPEG-2 Audio or MPEG-2 Audio BC), originally published in 1995. MPEG-2 Part 3 (ISO/IEC 13818-3) defined addi... | Further work on MPEG was finalized as a part of which MPEG standard? | {
"answer_start": [
64
],
"text": [
"second suite"
]
} |
5706262d52bb891400689901 | MP3 | Further work on MPEG audio was finalized in 1994 as part of the second suite of MPEG standards, MPEG-2, more formally known as international standard ISO/IEC 13818-3 (a.k.a. MPEG-2 Part 3 or backwards compatible MPEG-2 Audio or MPEG-2 Audio BC), originally published in 1995. MPEG-2 Part 3 (ISO/IEC 13818-3) defined addi... | What was the official name of ISO/IEC 13818-3 better known as? | {
"answer_start": [
96
],
"text": [
"MPEG-2"
]
} |
5706262d52bb891400689902 | MP3 | Further work on MPEG audio was finalized in 1994 as part of the second suite of MPEG standards, MPEG-2, more formally known as international standard ISO/IEC 13818-3 (a.k.a. MPEG-2 Part 3 or backwards compatible MPEG-2 Audio or MPEG-2 Audio BC), originally published in 1995. MPEG-2 Part 3 (ISO/IEC 13818-3) defined addi... | At what rate were the new sampling rates defined in comparison to MPEG-1 Audio? | {
"answer_start": [
427
],
"text": [
"half"
]
} |
5706262d52bb891400689903 | MP3 | Further work on MPEG audio was finalized in 1994 as part of the second suite of MPEG standards, MPEG-2, more formally known as international standard ISO/IEC 13818-3 (a.k.a. MPEG-2 Part 3 or backwards compatible MPEG-2 Audio or MPEG-2 Audio BC), originally published in 1995. MPEG-2 Part 3 (ISO/IEC 13818-3) defined addi... | Apart from cutting the frequency fidelity in half, what else was cut in half? | {
"answer_start": [
596
],
"text": [
"bitrate"
]
} |
5706262d52bb891400689904 | MP3 | Further work on MPEG audio was finalized in 1994 as part of the second suite of MPEG standards, MPEG-2, more formally known as international standard ISO/IEC 13818-3 (a.k.a. MPEG-2 Part 3 or backwards compatible MPEG-2 Audio or MPEG-2 Audio BC), originally published in 1995. MPEG-2 Part 3 (ISO/IEC 13818-3) defined addi... | Allowing the coding of audio programs with more than two channels was a major aspect of what? | {
"answer_start": [
612
],
"text": [
"MPEG-2 Part 3"
]
} |
5706282e52bb89140068990a | MP3 | An additional extension to MPEG-2 is named MPEG-2.5 audio, as MPEG-3 already had a different meaning. This extension was developed at Fraunhofer IIS, the registered MP3 patent holders. Like MPEG-2, MPEG-2.5 adds new sampling rates exactly half of that previously possible with MPEG-2. It thus widens the scope of MP3 to ... | As MPEG-3 had a different meaning, what was the name given to the extension of MPEG-2? | {
"answer_start": [
43
],
"text": [
"MPEG-2.5 audio"
]
} |
5706282e52bb89140068990b | MP3 | An additional extension to MPEG-2 is named MPEG-2.5 audio, as MPEG-3 already had a different meaning. This extension was developed at Fraunhofer IIS, the registered MP3 patent holders. Like MPEG-2, MPEG-2.5 adds new sampling rates exactly half of that previously possible with MPEG-2. It thus widens the scope of MP3 to ... | Where was this extension developed? | {
"answer_start": [
134
],
"text": [
"Fraunhofer IIS"
]
} |
5706282e52bb89140068990c | MP3 | An additional extension to MPEG-2 is named MPEG-2.5 audio, as MPEG-3 already had a different meaning. This extension was developed at Fraunhofer IIS, the registered MP3 patent holders. Like MPEG-2, MPEG-2.5 adds new sampling rates exactly half of that previously possible with MPEG-2. It thus widens the scope of MP3 to ... | The new sampling rates widened the scope of MP3 to be able to include what? | {
"answer_start": [
328
],
"text": [
"human speech"
]
} |
5706282e52bb89140068990d | MP3 | An additional extension to MPEG-2 is named MPEG-2.5 audio, as MPEG-3 already had a different meaning. This extension was developed at Fraunhofer IIS, the registered MP3 patent holders. Like MPEG-2, MPEG-2.5 adds new sampling rates exactly half of that previously possible with MPEG-2. It thus widens the scope of MP3 to ... | What is not an ISO recognized standard? | {
"answer_start": [
473
],
"text": [
"MPEG-2.5"
]
} |
5706282e52bb89140068990e | MP3 | An additional extension to MPEG-2 is named MPEG-2.5 audio, as MPEG-3 already had a different meaning. This extension was developed at Fraunhofer IIS, the registered MP3 patent holders. Like MPEG-2, MPEG-2.5 adds new sampling rates exactly half of that previously possible with MPEG-2. It thus widens the scope of MP3 to ... | As MPEG-2.5 is unofficial, it is considered what kind of extension to the MP3 format? | {
"answer_start": [
817
],
"text": [
"proprietary"
]
} |
570629ba52bb891400689914 | MP3 | Compression efficiency of encoders is typically defined by the bit rate, because compression ratio depends on the bit depth and sampling rate of the input signal. Nevertheless, compression ratios are often published. They may use the Compact Disc (CD) parameters as references (44.1 kHz, 2 channels at 16 bits per channe... | What defines the compression efficiency of encoders? | {
"answer_start": [
63
],
"text": [
"bit rate"
]
} |
570629ba52bb891400689915 | MP3 | Compression efficiency of encoders is typically defined by the bit rate, because compression ratio depends on the bit depth and sampling rate of the input signal. Nevertheless, compression ratios are often published. They may use the Compact Disc (CD) parameters as references (44.1 kHz, 2 channels at 16 bits per channe... | Compression ratio depends on the sample rate and bit depth of which signal? | {
"answer_start": [
149
],
"text": [
"input"
]
} |
570629ba52bb891400689916 | MP3 | Compression efficiency of encoders is typically defined by the bit rate, because compression ratio depends on the bit depth and sampling rate of the input signal. Nevertheless, compression ratios are often published. They may use the Compact Disc (CD) parameters as references (44.1 kHz, 2 channels at 16 bits per channe... | What does CD stand for? | {
"answer_start": [
234
],
"text": [
"Compact Disc"
]
} |
570629ba52bb891400689918 | MP3 | Compression efficiency of encoders is typically defined by the bit rate, because compression ratio depends on the bit depth and sampling rate of the input signal. Nevertheless, compression ratios are often published. They may use the Compact Disc (CD) parameters as references (44.1 kHz, 2 channels at 16 bits per channe... | Other than CD parameters, what else can be used as parameter references? | {
"answer_start": [
353
],
"text": [
"Digital Audio Tape (DAT) SP"
]
} |
570629ba52bb891400689917 | MP3 | Compression efficiency of encoders is typically defined by the bit rate, because compression ratio depends on the bit depth and sampling rate of the input signal. Nevertheless, compression ratios are often published. They may use the Compact Disc (CD) parameters as references (44.1 kHz, 2 channels at 16 bits per channe... | What can CD parameters be used as references for? | {
"answer_start": [
177
],
"text": [
"compression ratios"
]
} |
57062a3a75f01819005e7a14 | MP3 | Karlheinz Brandenburg used a CD recording of Suzanne Vega's song "Tom's Diner" to assess and refine the MP3 compression algorithm. This song was chosen because of its nearly monophonic nature and wide spectral content, making it easier to hear imperfections in the compression format during playbacks. Some refer to Suza... | What type of recording did Brandenburg use? | {
"answer_start": [
29
],
"text": [
"CD"
]
} |
57062a3a75f01819005e7a15 | MP3 | Karlheinz Brandenburg used a CD recording of Suzanne Vega's song "Tom's Diner" to assess and refine the MP3 compression algorithm. This song was chosen because of its nearly monophonic nature and wide spectral content, making it easier to hear imperfections in the compression format during playbacks. Some refer to Suza... | What did Brandenburg use the recording to refine? | {
"answer_start": [
100
],
"text": [
"the MP3 compression algorithm"
]
} |
57062a3a75f01819005e7a16 | MP3 | Karlheinz Brandenburg used a CD recording of Suzanne Vega's song "Tom's Diner" to assess and refine the MP3 compression algorithm. This song was chosen because of its nearly monophonic nature and wide spectral content, making it easier to hear imperfections in the compression format during playbacks. Some refer to Suza... | What word describes the nature of the song used? | {
"answer_start": [
174
],
"text": [
"monophonic"
]
} |
57062a3a75f01819005e7a17 | MP3 | Karlheinz Brandenburg used a CD recording of Suzanne Vega's song "Tom's Diner" to assess and refine the MP3 compression algorithm. This song was chosen because of its nearly monophonic nature and wide spectral content, making it easier to hear imperfections in the compression format during playbacks. Some refer to Suza... | As a result of her song being used, Suzanne Vega is sometimes referred to as what? | {
"answer_start": [
333
],
"text": [
"The mother of MP3"
]
} |
57062a3a75f01819005e7a18 | MP3 | Karlheinz Brandenburg used a CD recording of Suzanne Vega's song "Tom's Diner" to assess and refine the MP3 compression algorithm. This song was chosen because of its nearly monophonic nature and wide spectral content, making it easier to hear imperfections in the compression format during playbacks. Some refer to Suza... | Excerpts were taken from which reference compact disc to assess the subjective quality of the MPEG audio formats? | {
"answer_start": [
811
],
"text": [
"EBU V3/SQAM"
]
} |
57062b6152bb89140068991f | MP3 | A reference simulation software implementation, written in the C language and later known as ISO 11172-5, was developed (in 1991–1996) by the members of the ISO MPEG Audio committee in order to produce bit compliant MPEG Audio files (Layer 1, Layer 2, Layer 3). It was approved as a committee draft of ISO/IEC technical ... | Who developed the reference simulation software? | {
"answer_start": [
153
],
"text": [
"the ISO MPEG Audio committee"
]
} |
57062b6152bb89140068991e | MP3 | A reference simulation software implementation, written in the C language and later known as ISO 11172-5, was developed (in 1991–1996) by the members of the ISO MPEG Audio committee in order to produce bit compliant MPEG Audio files (Layer 1, Layer 2, Layer 3). It was approved as a committee draft of ISO/IEC technical ... | Which language was the reference simulation software written in? | {
"answer_start": [
63
],
"text": [
"C"
]
} |
57062b6152bb891400689920 | MP3 | A reference simulation software implementation, written in the C language and later known as ISO 11172-5, was developed (in 1991–1996) by the members of the ISO MPEG Audio committee in order to produce bit compliant MPEG Audio files (Layer 1, Layer 2, Layer 3). It was approved as a committee draft of ISO/IEC technical ... | When was the reference software approved? | {
"answer_start": [
330
],
"text": [
"March 1994"
]
} |
57062b6152bb891400689921 | MP3 | A reference simulation software implementation, written in the C language and later known as ISO 11172-5, was developed (in 1991–1996) by the members of the ISO MPEG Audio committee in order to produce bit compliant MPEG Audio files (Layer 1, Layer 2, Layer 3). It was approved as a committee draft of ISO/IEC technical ... | When did the reference software become an international standard? | {
"answer_start": [
548
],
"text": [
"1998"
]
} |
57062b6152bb891400689922 | MP3 | A reference simulation software implementation, written in the C language and later known as ISO 11172-5, was developed (in 1991–1996) by the members of the ISO MPEG Audio committee in order to produce bit compliant MPEG Audio files (Layer 1, Layer 2, Layer 3). It was approved as a committee draft of ISO/IEC technical ... | What could the reference software demonstrate? | {
"answer_start": [
743
],
"text": [
"real time hardware decoding"
]
} |
57062c2552bb891400689928 | MP3 | On 7 July 1994, the Fraunhofer Society released the first software MP3 encoder called l3enc. The filename extension .mp3 was chosen by the Fraunhofer team on 14 July 1995 (previously, the files had been named .bit). With the first real-time software MP3 player WinPlay3 (released 9 September 1995) many people were able ... | When was the first software MP3 encoder released? | {
"answer_start": [
3
],
"text": [
"7 July 1994"
]
} |
57062c2552bb891400689929 | MP3 | On 7 July 1994, the Fraunhofer Society released the first software MP3 encoder called l3enc. The filename extension .mp3 was chosen by the Fraunhofer team on 14 July 1995 (previously, the files had been named .bit). With the first real-time software MP3 player WinPlay3 (released 9 September 1995) many people were able ... | What was the name of the first software MP3 encoder? | {
"answer_start": [
86
],
"text": [
"l3enc"
]
} |
57062c2552bb89140068992a | MP3 | On 7 July 1994, the Fraunhofer Society released the first software MP3 encoder called l3enc. The filename extension .mp3 was chosen by the Fraunhofer team on 14 July 1995 (previously, the files had been named .bit). With the first real-time software MP3 player WinPlay3 (released 9 September 1995) many people were able ... | What was the filename extension? | {
"answer_start": [
116
],
"text": [
".mp3"
]
} |
57062c2552bb89140068992b | MP3 | On 7 July 1994, the Fraunhofer Society released the first software MP3 encoder called l3enc. The filename extension .mp3 was chosen by the Fraunhofer team on 14 July 1995 (previously, the files had been named .bit). With the first real-time software MP3 player WinPlay3 (released 9 September 1995) many people were able ... | What was the name of the first real-time software MP3 player? | {
"answer_start": [
261
],
"text": [
"WinPlay3"
]
} |
57062c2552bb89140068992c | MP3 | On 7 July 1994, the Fraunhofer Society released the first software MP3 encoder called l3enc. The filename extension .mp3 was chosen by the Fraunhofer team on 14 July 1995 (previously, the files had been named .bit). With the first real-time software MP3 player WinPlay3 (released 9 September 1995) many people were able ... | What was the average high end hard drive size? | {
"answer_start": [
437
],
"text": [
"1000 MB"
]
} |
57062c9b52bb891400689932 | MP3 | As sound scholar Jonathan Sterne notes, "An Australian hacker acquired l3enc using a stolen credit card. The hacker then reverse-engineered the software, wrote a new user interface, and redistributed it for free, naming it "thank you Fraunhofer"". | What was Jonathan Sterne's profession? | {
"answer_start": [
3
],
"text": [
"sound scholar"
]
} |
57062c9b52bb891400689933 | MP3 | As sound scholar Jonathan Sterne notes, "An Australian hacker acquired l3enc using a stolen credit card. The hacker then reverse-engineered the software, wrote a new user interface, and redistributed it for free, naming it "thank you Fraunhofer"". | Which nationality was the hacker who acquired I3enc? | {
"answer_start": [
44
],
"text": [
"Australian"
]
} |
57062c9b52bb891400689934 | MP3 | As sound scholar Jonathan Sterne notes, "An Australian hacker acquired l3enc using a stolen credit card. The hacker then reverse-engineered the software, wrote a new user interface, and redistributed it for free, naming it "thank you Fraunhofer"". | What did the hacker use to acquire the software? | {
"answer_start": [
85
],
"text": [
"stolen credit card"
]
} |
57062c9b52bb891400689935 | MP3 | As sound scholar Jonathan Sterne notes, "An Australian hacker acquired l3enc using a stolen credit card. The hacker then reverse-engineered the software, wrote a new user interface, and redistributed it for free, naming it "thank you Fraunhofer"". | The hacker re-wrote which element of the program? | {
"answer_start": [
166
],
"text": [
"user interface"
]
} |
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