hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
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630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.3 Content Identification | The content encoded in an CMMF bitstream can have a content identification. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.4 b_content_id_present | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.4.0 Introduction | This Boolean indicates whether the content_id_type, content_id_size_minus1, and content_id, fields are present the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.4.1 content_id_type | Several different identification options are supported. The content_id_type field indicates the type of identification present in the bitstream. The description of the values is specified in Table 52. Table 52: content_id_type description content_id_type Value Identification Description Type 0x0 Entertainment Identific... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.4.2 content_id_size_minus1 | This field indicates the size (in bytes) of the content_id field that immediately follows this field, minus one. For example, a content_id_size_minus1 value of '11' indicates a content_id of 12 bytes. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.4.3 content_id | This field shall contain the content ID associated with the current content as specified by the content_id_type: • EIDR: For an EIDR content ID type, the content_id field shall contain a 96-bit identifier that is registered with EIDR (http://eidr.org) in Compact Binary Format as defined by EIDR [2]. • Ad-ID: For an Ad-... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.5 b_content_location_present | This Boolean indicates whether the content_location_size and content_location fields are present in the bitstream. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 78 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.6 content_location_size, content_location | The content_location field provides the location of the content with size indicated by the content_location_size field (in bytes). This field is a string of ASCII [7] or UTF-8 [11] characters. The content_location_size field shall not have a value of 0. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.7 b_content_type_present | This Boolean indicates whether the content_type_size and content_type fields are present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.8 content_type_size, content_type | The content_type field is a human-readable description of the type of content with size indicated by the content_type_size field (in bytes). This field is a string of ASCII [7] or UTF-8 [11] characters. The content_type_size field shall not have a value of 0. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.9 b_content_header_present | This Boolean indicates whether the content_type_size and content_type_size fields are present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.10 content_header_size, content_header | The content_header field contains the first content_type_size bytes of the source data, unencoded. The content_header field can be parsed using existing methods to determine details about the content encoded within the bitstream. Example details include bit rate, resolution for video content, sampling frequency for aud... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.11 b_file_integrity_present | This Boolean indicates whether the file_integrity() structure is present in the bitstream. The file_integrity() structure is just an instance of the fb_integrity() structure that applies to the full file. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.8.12 b_media_preso_dur_present | This Boolean indicates whether the media_presentation_duration() structure is present in the bitstream. An encoded bitstream may only represent a segment of the overall source content, and the media_presentation_duration() structure indicates the duration of the entire presentation of the source content. This structure... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9 media_segment_info() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.0 Introduction | The media segment information (media_segment_info()) structure provides information about the underlying CMMF encoded media. This optional structure enables a system to inspect the underlying CMMF coded media without requiring a decode operation in settings that do not support access to a centralized service entity, ma... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.1 media_segment_block_index, media_segment_block_index_ext | The media_segment_block_index field, which is extendable by the media_segments_index_ext field, describes which block this media_segment_info() instance is associated with. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.2 media_segment_index, media_segment_index_ext | The media_segment_index field, which is extendable by the media_segment_index_ext field, identifies the media index of the instance of the media_segment_info() structure. The index is 0-based and shall have a value 0 except in cases where the media is multiplexed where each multiplexed stream shall have a unique media_... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.3 b_composite_source_index _present | This Boolean indicates whether media_segment_composite_source_index is present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.4 media_segment_composite_source_index | When the block associated with the relevant media segment (as indicated by the media_segment_block_index field) is a composite of different data sources, the media_segment_composite_index identifies which data source in that block the media segment applies to. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.5 b_asset_name_present | This Boolean indicates whether an asset name is present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.6 asset_name_size, asset_name | The asset_name is the name of the media asset of size indicated by the asset_name_size field (in bytes). This field is free-form and can be any ASCII [7] or UTF-8 [11] string of characters. The asset_name_size field shall not have a value of 0. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 80 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.7 segment_tag_mask | The segment_tag_mask field is a bit mask that describes which subsequent fields are present in the bitstream as listed in Table 53. Table 53: segment_tag_mask meaning segment_tag_mask bit Meaning 0 Segment duration present: This bit indicates whether the duration of the encoded media segment, as described by the segmen... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.8 segidx_bits, segcnt_bits | The operational variables segidx_bits and segcnt_bits are represented by the num_bits_code() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.9 segment_index | The segment_index field identifies which segment of the media is contained within the encoded data. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.10 segment_count | The segment_count field describes how many segments of this media exist. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.11 b_media_mime_type_present | This Boolean indicates whether information about the MIME type of the media is provided in the bitstream. In this case, the media_mime_type and media_mime_type_size fields are present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.12 media_mime_type_size, media_mime_type | media_mime_type is a string of ASCII [7] characters that describes the content using a discrete media type value as defined in section 4 of IETF RFC 2046 [23] and/or IETF RFC 4337 [22]. Up to the first 63 bytes of the media type can be indicated. The size (in bytes) of the media_mime_type field is indicated by the medi... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.13 b_media_codec_present | This Boolean indicates whether information about the codec is provided in the bitstream. In this case, the media_codec and media_codec_size fields are present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.14 media_codec_size, media_codec | media_codec is a string of ASCII [7] or UTF-8 [11] characters conforming to either the simp-list or fancy-list productions of IETF RFC 6381 [5], section 3.2, without the enclosing DQUOTE characters. Up to the first 63 bytes of a single codec identifier for the media format, mapped into the name space for codecs as spec... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.15 b_bit_rate_present | This Boolean indicates whether the bit_rate field is present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.16 bit_rate_bits_code | The bit_rate_bits_code field describes how many bits are used to describe the bit rate of the media segment. Table 54: bit_rate_bits_code meaning bit_rate_bits_code Value Meaning 0b 24 bits 1b 32 bits The operational variable bps_bits is used to specify the number of bits used to represent the bit rate and is calculate... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.17 bit_rate | The bit_rate field describes the bit rate of the media segment and has units of bits per second. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.18 b_ms_content_type_present | This Boolean indicates whether the ms_content_type field is present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.19 ms_content_type | The ms_content_type field describes the type of content contained within the media segment. The field is described in Table 55. Table 55: ms_content_type description ms_content_type value Description 0x0 Video 0x1 Audio 0x2 Multiplexed media of different content types 0x3 Application data 0x4 Text 0x5-0x7 Reserved |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.20 b_ms_content_type_info_present | This Boolean indicates whether additional information based on the value of the ms_content_type field is present in the bitstream. It shall not be set unless b_ms_content_type_present is set. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.21 b_aspect_ratio_present | This Boolean indicates whether information about the picture aspect ratio is provided in the bitstream. In this case, the sample_aspect_ratio and potentially the sar_width and sar_height fields are present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.22 sample_aspect_ratio | The picture aspect ratio describes the ratio of the width dimension to the height dimension of the video. The sample_aspect_ratio field has the same meaning as the SampleAspectRatio field as described in ISO/IEC 23091-2 [10]. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 82 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.23 sar_width, sar_height | The picture aspect ratio describes the ratio of the width dimension to the height dimension of the video. When the sample_aspect_ratio has a value of 255, then the sar_width and sar_height fields are present in the bitstream and indicate the horizontal and vertical dimensions, respectively, of the sample aspect ratio o... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.24 b_dynamic_resolution_video | This Boolean indicates whether the resolution of the video varies throughout the program. In this case, and if b_resolution_present is set, the resolution_width and resolution_height fields indicate the maximum resolution of the program. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.25 b_resolution_present | This Boolean indicates whether the resolution of the video is provided in the bitstream. In this case, the resolution_width and resolution_height fields are present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.26 resolution_width, resolution_height | The resolution_width and resolution_height fields describe the horizontal pixel count and vertical line count, respectively, of the related video media segment. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.27 b_frame_rate_present | This Boolean indicates whether the video frame rate is provided in the bitstream. In this case, the frame_rate field and a reserved field are present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.28 frame_rate | The frame_rate field describes how many frames per second (fps) appear in the associated video. The meaning of this field is specified in Table 56. In the case of interlaced video, the frame rate is 1/2 the field rate. Fractional frame rates expressed as decimal fractions, such as 23,976 fps or 59,94 fps, are approxima... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.29 b_hdr_info_present | This Boolean indicates whether High Dynamic Range (HDR) video information follows in the bitstream. Otherwise, the video should not be considered HDR. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 83 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.30 hdr_compatibility_mask | The hdr_compatibility_mask field is a bit mask where each bit indicates that the video is compatible with a specific HDR format. The meaning of this field is specified in Table 57. Table 57: hdr_compatibility_mask values hdr_compatibility_mask Bit Meaning (compatible with) 0 HDR10 1 HLG™ 2 SMPTE 2094-10 3 SMPTE 2094-20... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.31 b_addl_hdr_info_present | This Boolean indicates whether additional High Dynamic Range (HDR) video information follows in the bitstream as indicated by the hdr_compat_mask_index, hdr_profile, hdr_level, and hdr_compatibility_id fields. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.32 hdr_compat_mask_index | The hdr_compat_mask_index field is an index into hdr_compatibility_mask field to identify which HDR format the subsequent hdr_profile, hdr_level, and hdr_compatibility_id fields correspond to. For example, if hdr_compat_mask_index has a value of 8, then the subsequent fields relate to Dolby Vision™. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.33 hdr_profile | The hdr_profile field specifies the profile of the HDR video. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.34 hdr_level | The hdr_level field specifies the level of the HDR video. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.35 hdr_compatibility_id | The hdr_compatibility_id field specifies a particular form of a base layer substream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.36 b_addl_video_info_present | This Boolean indicates whether the addl_video_info() structure is present in the bitstream. The addl_video_info() structure provides a mechanism to extend the video content type with additional information and is an instance of the extension() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.37 b_sampling_freq_present | This Boolean indicates whether the audio sampling frequency is provided in the bitstream. In this case, the b_sampling_freq_is_48k field is present in the bitstream. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 84 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.38 b_sampling_freq_is_48k | This Boolean indicates whether the audio in this media segment has an audio sampling frequency of 48 000 Hz. Otherwise, the sampling_frequency field is present in the bitstream, providing the sampling frequency of the audio. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.39 sampling_frequency | The sampling_frequency field describes the sampling rate of the audio in the media segment. The value of this field is specified in Table 58. Table 58: sampling_frequency values sampling_frequency value Sampling frequency (kHz) 0 6 1 8 2 12 3 24 4 48 5 96 6 192 7 22,05 8 44,1 9 88,2 10 176,4 11 - 15 Reserved |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.40 b_audio_config_present | This Boolean indicates whether the audio channel configuration is described in the bitstream. In this case, the audio_channel_config field is present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.41 audio_channel_config | The audio_channel_config field defines the audio channel configuration of the media segment. The field is a bit mask of speaker groups present in the channel configuration. The value of this field is specified in Table 59. Table 59: audio_channel_config values audio_channel_config Bit Speaker group location(s) 0 Left (... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.42 b_audio_props_present | This Boolean indicates whether additional fields describing other audio properties are provided in the bitstream. In this case, the b_virtualized_bin, b_object_audio and b_complexity_index_present fields, as well as two reserved fields, are present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.43 b_virtualized_bin | This Boolean indicates whether the audio contains a binaural virtualized experienced. In this case, and if b_audio_config_present is set, then the audio_channel_config field shall have a value of 0x00 0001 indicating that only the L and R channels are present. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.44 b_object_audio | This Boolean indicates whether the media segment contains an object-based audio presentation. Otherwise, the audio presentation is channel based. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.45 b_complexity_index_present | This Boolean indicates whether the complexity index information is provided in the bitstream. In this case, the complexity_index field is present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.46 complexity_index | The complexity_index field specifies the number of channels and/or objects of the audio. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 86 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.47 b_addl_audio_info_present | This Boolean indicates whether the addl_audio_info() structure is present in the bitstream. The addl_audio_info() structure provides a mechanism to extend the audio content type with additional information and is an instance of the extension() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.48 b_addl_ms_content_type_info_present | This Boolean indicates whether the addl_ms_content_type_info() structure is present in the bitstream. The addl_ms_content_type_info() structure provides a placeholder to define additional information for other ms_content_type values. This structure is an instance of the extension() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.49 accessibility_mask | The accessibility_mask field is a bit mask that describes which subsequent accessibility-related fields are present in the bitstream as listed in Table 60. Table 60: accessibility_mask meaning accessibility_mask bit Meaning 0 Language present: If this bit is set, the language of the media segment is present in the bits... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.9.50 language_size, language | The language field contains a language tag that conforms to the syntax and semantics defined in IETF RFC 4646 [6]. The size (in bytes) of the field is indicated by the language_size field. The minimum sequence length shall be two bytes, supporting a two-character language tag as specified in ISO 639 [4]. The maximum su... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10 cmmf_time() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10.0 Introduction | The cmmf_time() structure represents temporal information, with a range of 31 days, 23 hours, 59 minutes, and 59,999 seconds, and a granularity of one microsecond (1 second / 1 000), one nanosecond (1 second / 1 000 000), or one picosecond (1 second / 1 000 000 000). Multiple instances of this syntax are present in the... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10.1 b_ddhhmmss | This Boolean indicates whether the subsequent temporal information is presented in a days, hours, minutes, and seconds (DD:HH:MM:SS) format, and the b_dd_present, b_hh_present, b_mm_present, and b_ss_present fields are present in the bitstream. Otherwise, the temporal information is presented in seconds, and the int_se... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10.2 DD:HH:MM:SS format | If the b_ddhhmmss field is set, the temporal information is indicated by the days, hours, minutes, and seconds fields. Each of these fields has an associated presence flag indicating whether the field is present in the bitstream. A field that is not present in the bitstream has a value of 0. Table 61: DD:HH:MM:SS forma... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10.3 int_seconds_bits_code | The int_seconds_bits_code field describes the number of bits used to encode the int_seconds field. The meaning of this field is specified in Table 62. Table 62: int_seconds_bits_code meaning int_seconds_bits_code value Meaning 00b The value of int_seconds_bits_code is 8 bits. 01b The value of int_seconds_bits_code is 1... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10.4 int_seconds | If the b_ddhhmmss field is cleared, the temporal information is indicated by the int_seconds field, describing the number of integer seconds. This field has a range of [0, 2 764 799] (up to 31 days, 23 hours, 59 minutes, 59 seconds). |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10.5 b_fract_seconds_present | This Boolean indicates whether the fract_seconds field is present in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10.6 fract_seconds_bits_code | The fract_seconds_bits_code field describes the number of bits used to encode the fract_seconds field. The meaning of this field is specified in Table 63. Table 63: fract_seconds_bits_code meaning fract_seconds_bits_code value Meaning 00b The value of fract_seconds_bits_code is 10 bits. 01b The value of fract_seconds_b... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.10.7 fract_seconds | The fract_seconds field describes the number of fractional seconds added to the integer seconds described above. The field has a range depending on the value of fs_bits, as shown in Table 64. Table 64: fract_seconds range and divisor fs_bits value fract_seconds range fract_seconds divisor 10 bits [0, 999] 1 000 20 bits... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11 chunked_subatom() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.0 Introduction | The chunked_subatom() structure contains a 'chunk' of subatom data. It provides a mechanism to partition large subatom data into multiple smaller chunk segments. For example if the coded symbol size in a packet subatom is very large for the transmission protocol in use, the subatom packet() data can be split into small... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.1 chunk_segment_id | The chunk_segment_id field identifies a series of chunked_subatom() instances as containing different portions of the same subatom data. When subatom data is chunked, all chunked_subatom() instances of that data shall have the same value in the chunk_segment_id field. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.2 chunk_segment_index | The chunk_segment_index field identifies the index of the chunk segment of subatom data contained within the chunked_subatom(). A parser can use this information to reassemble the chunked subatom data to its original order. If a chunk segment is lost in transmission, and a complete set of chunk segments is not received... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.3 num_chunk_segments | The num_chunk_segments field describes the number of chunk segments that the subatom data (associated with the indicated chunk_segment_id) has been split into. The value of this field shall be greater than 1. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.4 original_subatom_id, original_subatom_id_ext | The original_subatom_id field, which is extendable by the original_subatom_id_ext field, specifies the subatom_id of the segment data contained within the chunked_subatom(). ETSI ETSI TS 103 973 V1.2.1 (2026-03) 89 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.5 oss_bits | The operational variable oss_bits is used in the syntax to specify the number of bits used to encode the original subatom data size and is represented by the num_bits_code() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.6 original_subatom_size | The original_subatom_size field describes the size of the original subatom data prior to being chunked, in bytes. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.7 byte_align | This bit field of size 0 to 7 bits is used for the byte alignment of the associated chunked_subatom() structure. Byte alignment is defined relative to the start of the enclosing syntactic element. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.11.8 chunked_subatom_segment_data | The chunked_subatom_segment_data field contains a chunk segment of the chunked subatom data. The operational variable cssd_bits is used in the syntax to specify the number of bits used to encode chunked_subatom_segment_data and is based on several fields according to the following semantic equation: cssd_bits = (subato... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12 block_group_directory() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12.0 Introduction | The block group directory (block_group_directory()) contains fields to indicate the start of block header subatom (i.e. subatoms with the block_header() structure) or packet group subatom (i.e. subatoms with the packet_group() structure) instances in the bitstream. The block group directory subatom shall not contain an... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12.1 block_group_dir_mask | The block_group_dir_mask field is an array of Booleans that describes which subsequent fields are present in the bitstream as listed in Table 65. Table 65: block_group_dir_mask meaning block_group_dir_mask bit Meaning 0 Block header directory symbols present: This Boolean indicates whether fields that specify the offse... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12.2 block_header_subatom_offset[block] | The block_header_subatom_offset[block] field describes the offset, in bytes, until the block header subatom with a block_index value of block. The offset is relative to the 'directory_end' label. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12.3 num_packet_groups[block] | The num_packet_groups[block] field describes the number of packet group subatom instances present for block'th block. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12.4 packet_group_index[block][pg] | The packet_group_index[block][pg] field identifies the pg'th instance of the packet_group()associated with the block'th block. This field is only present if bit 2 of the block_group_dir_mask field is 0. Otherwise this field is present as part of the packet_group() structures in the block group directory. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12.5 packet_group_subatom_offset[block][pg] | The packet_group_subatom_offset[block] field describes the offset, in bytes, until the pg'th packet group subatom with a packet_group_block_index value of block. This field shall only describe the offset to packet group subatoms that have a packet_group_type value of 00b or 10b, i.e. the coded_symbol fields are present... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12.6 num_multi_block_packet_groups | The num_multi_block_packet_groups field describes the number of multiple block packet group subatom instances present. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.12.7 multi_block_packet_group_subatom_offset[mbpg] | The multi_block_packet_group_subatom_offset[mbpg] field describes the offset, in bytes, until the instance of the multiple block packet group subatom with a mpbg__index value of mbpg. The offset is relative to the 'directory_end' label. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.13 fb_integrity() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.13.0 Introduction | The fb_integrity() contains fields to verify the integrity of the received and decoded full file or block. The fb_integrity() element provides a mechanism to verify the integrity of the decoded data in the full file or a given block. This element is referenced by other structures in the syntax When referenced in the en... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.13.1 fb_hash_type | The fb_hash_type field describes how the hash on the data is calculated. The meaning of this field is specified in Table 66. Table 66: fb_hash_type meaning fb_hash_type value Meaning 00b The hash is calculated on the full file or block data. 01b The hash is a Merkel root hash of the original symbols. 10b-11b Reserved. ... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.13.2 fb_hash_algorithm | The fb_hash_algorithm field describes the algorithm used to calculate the hash of the data. The meaning of this field is specified in Table 67. Table 67: fb_hash_algorithm meaning fb_hash_algorithm value Meaning 000b The hash is calculated using the SHA-1 [9] algorithm. 001b The hash is a CRC of the data, modulo the po... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.13.3 fb_hash_size | The fb_hash_size field describes the number of bits of the hash digest. The meaning of this field is specified in Table 68. Table 68: fb_hash_size meaning fb_hash_size value Meaning 0000b The hash digest size is 8 bits. 0001b The hash digest size is 32 bits. 0010b The hash digest size is 64 bits. 0011b The hash digest ... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.13.4 b_fb_integrity_ext | This Boolean indicates whether the fb_integrity_ext() structure is present in the bitstream. The fb_integrity_ext() structure provides a mechanism to extend the file or block integrity check with additional information and is an instance of the extension() structure. |
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