hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
|---|---|---|---|
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.11 dialog_max_gain - dialogue maximum gain | This 2-bit element indicates the maximum gain, g_dialog_max, by which a user might change the balance between music and effects (M+E) and dialogue in favour of dialogue. The g_dialog_max value is determined as follows: g_dialogmaxdialog_max_gain×dB If dialog_max_gain is not present in a frame where the correspo... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.12 b_pan_dialog_present - dialogue pan data present flag | This Boolean indicates whether dialogue pan data is present and shall follow in the bitstream. ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 120 |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.13 pan_dialog - dialogue pan data | This 8-bit element indicates the angle used for panning one or two dialogue signals onto the music and effects track. The meaning is the same as for pan_associated. See clause 4.3.12.4.9. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.14 pan_signal_selector - selector of panning signal | This field indicates the possibility to perform a simplified decoding of the 3_0_channel_element. A simplified decoding and processing of 3_0_channel_element may be carried out if all of the following conditions are met: • channel_mode is 2 (indicating 3 channels); • 3_0_channel_element is used; • 3_0_codec_mode is set... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.15 b_channels_classifier - channel classifier flag | This Boolean indicates whether channel classification data is available. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.16 b_{c,l,r,ls,rs,lb,rb,lw,rw,tfl,tfr,lfe}_active - channel active flag | This Boolean indicates whether the corresponding channel, C, L, R, Ls, Rs, Lb, Rb, Lw, Rw, Tfl, Tfr, or LFE, is active. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.17 b_{c,l,r}_has_dialog - channel has dialogue flag | This Boolean indicates whether the corresponding channel, C, L or R, contains a dialogue. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.18 b_event_probability_present - event probability present flag | This Boolean indicates whether an event probability value is transmitted. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.4.19 event_probability - event probability | This 4-bit element indicates the probability that a congruent audio event is ongoing. A high value corresponds to a high certainty. ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 121 |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.5 Channel mode query functions | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.5.1 channel_mode_contains_Lfe() | This function returns true if the channel mode contains an Low-Frequency Effects channel. Pseudocode 9 channel_mode_contains_Lfe() { if (ch_mode == 4 || ch_mode == 6 || ch_mode == 8 || ch_mode == 10) { return TRUE; } return FALSE; } |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.5.2 channel_mode_contains_c() | This function returns true if the channel mode contains a Centre channel. Pseudocode 10 channel_mode_contains_c() { if (ch_mode == 0 || (ch_mode >= 2 && ch_mode <= 10)) { return TRUE; } return FALSE; } |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.5.3 channel_mode_contains_lr() | This function returns true if the channel mode contains a Left and a Right channel. Pseudocode 11 channel_mode_contains_lr() { if (ch_mode >= 1 && ch_mode <= 10) { return TRUE; } return FALSE; } |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.5.4 channel_mode_contains_LsRs() | This function returns true if the channel mode contains a Left Surround and a Right Surround channel. Pseudocode 12 channel_mode_contains_LsRs() { if (ch_mode >= 3 && ch_mode <= 10) { return TRUE; } return FALSE; } ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 122 |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.5.5 channel_mode_contains_LbRb() | This function returns true if the channel mode contains a Left Back and a Right Back channel. Pseudocode 13 channel_mode_contains_LbRb() { if (ch_mode == 5 || ch_mode == 6) { return TRUE; } return FALSE; } |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.5.6 channel_mode_contains_LwRw() | This function returns true if the channel mode contains a Left Wide and a Right Wide channel. Pseudocode 14 channel_mode_contains_LwRw() { if (ch_mode == 7 || ch_mode == 8) { return TRUE; } return FALSE; } |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.12.5.7 channel_mode_contains_TflTfr() | This function returns true if the channel mode contains a Top Front Left and a Top Front Right channel. Pseudocode 15 channel_mode_contains_TflTfr() { if (ch_mode == 9 || ch_mode == 10) { return TRUE; } return FALSE; } |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13 Dynamic Range Control - DRC | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.1 drc_frame - dynamic range control | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.1.1 b_drc_present - DRC present | This Boolean indicates whether DRC data is available in the bitstream. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.2 drc_config - DRC configuration | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.2.1 drc_decoder_nr_modes - number of DRC decoder modes | This 3-bit element indicates the number of DRC decoder modes carried in drc_frame, which is drc_decoder_nr_modes + 1. ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 123 |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.2.2 drc_eac3_profile - (E-)AC-3 DRC profile | This 3-bit element indicates which (E-)AC-3 dynamic range control compression profile to use when transcoding an AC-4 stream into (E-)AC-3. Table 160 shows how the values of this field are related to the (E-)AC-3 dynamic range control compression profile. Table 160: (E-)AC-3 dynamic range control compression profiles d... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3 drc_decoder_mode_config - DRC decoder mode configuration | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3.1 drc_decoder_mode_id - DRC decoder mode ID | This 3-bit element indicates DRC decoder mode IDs as shown in table 161. Table 161: drc_decoder_mode_id Value of drc_decoder_mode_id DRC decoder mode Output level range 0 Home Theatre -31...-27 1 Flat panel TV -26...-17 2 Portable - Speakers -16...0 3 Portable - Headphones -16...0 4 Reserved - 5 Reserved - 6 Reserved -... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3.2 drc_output_level_from - lowest reference output level | This 5-bit element indicates the lowest output level of the reference level (dialnorm, see clause 4.3.12.2.1) for the corresponding DRC decoder mode. The value of the field represents levels in dBFS according to: Lout,min = −drc_output_level_from dB The output range for the default DRC decoder modes is defined in tab... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3.3 drc_output_level_to - highest reference output level | This 5-bit element indicates the highest output level of the reference level (dialnorm, see clause 4.3.12.2.1) for the corresponding DRC decoder mode. The value of the field represents levels in dBFS according to: Lout,max = −drc_output_level_to dB The output range for the default DRC decoder modes is defined in tabl... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3.4 drc_repeat_profile_flag - repeat profile flag | This bit indicates that the current DRC decoder mode is identical to the DRC decoder mode with the ID given by the following drc_repeat_id field as described in clause 4.3.13.3.5. ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 124 |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3.5 drc_repeat_id - repeat data from ID | When the configuration of two or more DRC decoder modes is identical, this 3-bit element provides an option to duplicate the configuration without signalling it twice. If this field is present, this DRC decoder mode is defined by the DRC decoder mode with ID drc_repeat_id. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3.6 drc_default_profile_flag - default profile flag | This bit indicates that the (E-)AC-3 profile (ETSI TS 102 366 [i.1]), indicated by drc_eac3_profile, shall be used to define the compression curve and time constants. The definition of the (E-)AC-3 profiles data is given in table 162. NOTE 1: Semantics for the compression curve parameters are given in clause 4.3.13.4. ... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3.7 drc_compression_curve_flag - compression curve flag | ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 127 This bit indicates whether a compression curve is transmitted for the current DRC decoder mode (drc_compression_curve_flag = 1) or whether compression gains are transmitted by drc_frame (drc_compression_curve_flag = 0). |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.3.8 drc_gains_config - DRC gains configuration | This 2-bit element indicates the manner in which configuration dynamic range control (DRC) gains for this DRC decoder mode are transmitted, and implicitly the total number of DRC bands used in this mode. The number of parameter bands can be derived using table 163, and the definitions for configurations 2 and 3 are lis... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4 drc_compression_curve - compression curve parameters | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.1 DRC compression curve parametrization | Figure 1 shows the parametrization of the gain curve. The gain curve is described by control points, defining sections. The control points are described by pairs (level, gain) which are given in dB2. The level is relative to the reference level dialogue normalization, i.e. a level of zero is at the reference level. The... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.2 drc_lev_nullband_low - null band lower boundary | This 4-bit element defines the lower limit of the null-band. See table 166. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.3 drc_lev_nullband_high - null band higher boundary | This 4-bit element defines the upper limit of the null-band. See table 166. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.4 drc_gain_max_boost - maximum boost | This 4-bit element defines the maximum boost gain. See table 166. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.5 drc_lev_max_boost - start of maximum boosting | This 5-bit element defines the upper limit of the maximum boost section. See table 166. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.6 drc_nr_boost_sections - number of boost sections | This bit controls the number of boost sections. See table 166. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.7 drc_gain_section_boost - extra boost section gain | This 4-bit element defines an extra control point gain. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.8 drc_lev_section_boost - extra boost section control point level | This 5-bit element defines an extra control point level. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.9 drc_gain_max_cut - maximum cut | This 5-bit element defines the maximum cut gain. See table 166. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.10 drc_lev_max_cut - start of maximum cutting | This 6-bit element defines the upper limit of the maximum cut section. See table 166. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.11 drc_nr_cut_sections - number of cut sections | This bit controls the number of cut sections. See table 166. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.12 drc_gain_section_cut - extra cut section gain | This 5-bit element defines an extra control point gain. ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 129 |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.13 drc_lev_section_cut - extra cut section control point level | This 5-bit element defines an extra control point level. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.14 drc_tc_default_flag - DRC default time constants flag | This bit indicates whether the default gain smoothing parameters should be used or if different time constants should be transmitted in the bitstream. If drc_tc_default_flag is 1, the smoothing data in table 167 is used. Table 167: Default smoothing data Field Value τattack 100 ms τrelease 3 000 ms τattack,fast 10 ms τ... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.15 drc_tc_attack - time constant for attacks | This 8-bit element defines the time constant for smoothing during attacks. The time constant is given by: τattack = drc_tc_attack × 5ms |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.16 drc_tc_release - time constant for release | This 8-bit element defines the time constant for smoothing during signal release. The time constant is given by: τrelease = drc_tc_release × 40ms |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.17 drc_tc_attack_fast - time constant fast attacks | This 8-bit element defines the time constant for smoothing during fast attacks. The time constant is given by: τattack,fast = drc_tc_attack_fast × 5ms |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.18 drc_tc_release_fast - time constant for fast release | This 8-bit element defines the time constant for smoothing during fast signal release. The time constant is given by: τrelease,fast = drc_tc_release_fast × 20ms |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.19 drc_adaptive_smoothing_flag - adaptive smoothing flag | This bit indicates whether adaptive smoothing is supported by the profile. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.20 drc_attack_threshold - fast attack threshold | This 5-bit element indicates the threshold in dB for deciding when to switch to the fast attack time constant. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.4.21 drc_release_threshold - fast release threshold | This 5-bit element indicates the threshold in dB for deciding when to switch to the fast release time constant. ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 130 |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.5 drc_data - DRC frame-based data | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.5.1 drc_gainset_size_value - gain set data size | This element codes drc_gainset_size. It is a 6-bit element that can be extended by variable_bits(). The value of drc_gainset_size is the size in bits of the following drc_gains element. A decoder may use this information to skip profile data that are not applicable. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.5.2 b_more_bits - more bits flag | This Boolean indicates whether additional variable_bits are present, to determine the drc_gainset_size. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.5.3 drc_version - DRC version | This 2-bit element indicates the version of the DRC gainset data. For DRC gainset data that conforms to the present document, the drc_version field shall be set to 0b00, and thus the drc2_bits field shall not be present in the payload. A decoder implemented in accordance with the present document shall skip the drc2_bi... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.5.4 drc2_bits - DRC gainset extension bits | This element of size bits_left, which is only present if drc_version is not 0, holds additional DRC gainset data. The content of this additional DRC gainset data is not specified here since bitstreams conforming to the present document shall have drc_version=0. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.5.5 drc_reset_flag - DRC reset flag | This bit signals a reset of the DRC algorithm. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.5.6 drc_reserved - reserved bits | This 2-bit element is reserved for future use and the content shall be skipped by an AC-4 decoder conforming to the present document. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.6 drc_gains - DRC gains | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.6.1 drc_gain_val - DRC gain | This 7-bit element contains the first DRC gain. drc_gain[0][0][0] = drc_gain_val −64 [dB] |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.6.2 drc_gain_code - DRC gain codeword | This variable-length element contains a Huffman code. The huff_decode_diff() function looks up the Huffman code using the Huffman code book DRC_HCB specified in table A.62 and generates a differential DRC gain value. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.7 DRC helper elements | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.7.1 nr_drc_channels - number of DRC channels | The nr_drc_channels variable indicates for how many channels DRC gains are transmitted. The value of this variable depends on the channel configuration for which the content is transmitted, as defined in table 168. ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 131 Table 168: nr_drc_channels Channel configuration nr_drc_chann... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.13.7.2 nr_drc_subframes - number of DRC subframes | The variable nr_drc_subframes indicates the number of DRC subframes within an AC-4 frame. Table 169 lists the supported frame lengths and the corresponding number of DRC subframes. Table 169: nr_drc_subframes Frame length Subframe length nr_drc_subframes 384 384 1 512 256 2 768 256 3 960 320 3 1 024 256 4 1 536 256 6 1... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14 Dialogue Enhancement - DE | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.1 b_de_data_present - dialogue enhancement data present flag | This Boolean indicates whether dialogue enhancement data is present in the bitstream. If an audio signal contains dialogue, it is recommended that dialogue enhancement data is present, i.e. b_de_data_present should be true for all frames. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.2 de_config_flag - dialogue enhancement configuration flag | This bit indicates whether a frame that is not an I-frame contains dialogue enhancement configuration data. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.3 de_config - dialogue enhancement configuration | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.3.1 de_method - dialogue enhancement method | This 2-bit element indicates the dialog enhancement method as shown in table 170. Table 170: Description of de_method values Value de_method 0 Channel independent dialogue enhancement 1 Cross-channel dialogue enhancement 2 Waveform-parametric hybrid; channel independent enhancement and waveform channel 3 Waveform-param... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.3.2 de_max_gain - maximum dialogue enhancement gain | This 2-bit element defines the maximum gain (Gmax) allowed for boosting the dialogue: Gmax = de_max_gain + 1 × 3 dB If de_max_gain is not present in a frame where the corresponding b_iframe flag in the substream info is set to true, then Gmax shall be set to 0 dB. NOTE: de_max_gain is only present if b_de_data_pre... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.3.3 de_channel_config - channel configuration | This 3-bit element indicates the channels for which dialogue enhancement parameters are transmitted as specified in table 171, column 2. For mono and stereo content, only a subset of the possible codewords are valid, as marked with an 'X' in column 4 and 5. Column 3 lists values of de_nr_channels derived from de_channe... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.4 de_data - dialogue enhancement data | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.4.1 de_keep_pos_flag - keep position flag | This binary flag indicates whether the dialogue panning information of the previous frame should be repeated for the current frame. For I-frames, this flag defaults to zero. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.4.2 de_mix_coef1_idx, de_mix_coef2_idx - dialogue panning parameters | These 5-bit elements define the mixing of the dialogue signal onto the first, second and potentially third channel processed by the dialogue enhancement tool. Up to two parameters are decoded using the quantization vector defined in table 172. The last coefficient is always derived considering an energy preserving upmi... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.4.3 de_keep_data_flag - keep data flag | This bit indicates whether the latest transmitted parametric data shall be repeated for the current frame. ETSI ETSI TS 103 190-1 V1.4.1 (2025-07) 133 |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.4.4 de_ms_proc_flag - M/S processing flag | This bit indicates whether the parameters are related to processing on the Mid/Side representation of the signal. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.4.5 de_par_code - parameter code | This variable-length element contains a Huffman code indicating a dialogue enhancement parameter, representing either an absolute parameter quantization index or a differential value. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.4.6 de_signal_contribution - contribution of the signal to the enhancement | This 5-bit element indicates the contribution of the coded signal in the hybrid mode. It indicates the ratio of the gain that should be contributed by the coded signal. αc = de_signal_contribution |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.5 Dialogue enhancement helper elements | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.5.1 de_nr_bands - number of parameter bands | This constant value indicates the number of dialogue enhancement parameter bands, which is always 8 bands. The QMF band grouping for each dialogue enhancement parameter band is shown in table 173. Table 173: Dialog enhancement parameter band definition Dialogue enhancement parameter band First QMF band Last QMF band 0 ... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.5.2 de_par[ ][ ] - dialogue enhancement parameter set | Variable that contains the decoded quantization indices to the dialogue enhancement parameters for de_nr_channels and de_nr_bands. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.5.3 de_par_prev[ ][ ] - previous dialogue enhancement parameter set | Variable that contains the decoded quantization indices to the dialogue enhancement parameters for the previous frame. If no parameter was defined in the previous frame(i.e. dialogue enhancement is inactive or the respective channel is not used), it shall be assumed to be 0. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.5.4 de_abs_huffman(table_idx, code) - absolute parameter Huffman decoding | This is a function that looks up Huffman codes, resulting in a dialogue enhancement parameter quantization index. If table_idx is zero, the Huffman codebook DE_HCB_ABS_0 from table A.58 is used; otherwise, DE_HCB_ABS_1 from table A.60 is used. Pseudocode 16 de_abs_huffman(table_idx, code) { if (table_idx == 0) { hcb = ... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.14.5.5 de_diff_huffman(table_idx, code) - differential parameter Huffman decoding | This is a function that looks up Huffman codes, resulting in a differential dialog enhancement parameter quantization index. If table_idx is zero, the Huffman codebook DE_HCB_DIFF_0 from table A.59 is used; otherwise, DE_HCB_DIFF_1 from table A.61. Pseudocode 17 de_diff_huffman(table_idx, code) { if (table_idx == 0) { ... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15 Extensible Metadata Delivery Format - EMDF | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.0 Introduction | The extensible metadata delivery format is an extensible structure for metadata delivery. Each payload is tagged with a specific payload identifier to provide an unambiguous indication of the type of data present in the payload. The order of payloads within the EMDF substream is undefined: payloads can be stored in any... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.1 emdf_payloads_substream - EMDF payloads substream | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.1.1 emdf_payload_id - EMDF payload identification | This element identifies the type of payload that follows in the EMDF substream. It is a 5-bit element that can be extended by variable_bits(). The assignment of emdf_payload_id field values to specific payload types is specified in table 174. Table 174: Defined EMDF payload types emdf_payload_id EMDF payload type 0 EMD... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.1.2 emdf_payload_size - size of EMDF payload | This element indicates the size of the following payload. It is an 8-bit element that can be extended by variable_bits(). The value of the emdf_payload_size element shall be equal to the number of bytes in the following payload, excluding the emdf_payload_size field and all fields in emdf_payload_config. ETSI ETSI TS 1... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.1.3 emdf_payload_byte - EMDF payload byte | The 8-bit element, together with emdf_payload_size, forms the EMDF payload. The sequence of emdf_payload_size and emdf_payload_byte values forms the EMDF payload. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.2 emdf_payload_config - EMDF payload configuration | |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.2.1 b_smpoffst - payload sample offset flag | This Boolean indicates whether the smpoffst field follows in the bitstream. Otherwise, the current payload applies to the first sample of the AC-4 frame. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.2.2 smpoffst - payload sample offset | This element indicates the offset, in units of PCM audio samples, from the beginning of the AC-4 frame to the first PCM audio sample that the data in the payload shall apply to. It is an 11-bit element that can be extended by variable_bits(). NOTE: This field may indicate a sample index that extends beyond the current ... |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.2.3 b_duration - payload duration flag | This Boolean indicates whether the duration field shall follow in the bitstream. Otherwise, the current payload applies to all samples up to and including the final sample of the AC-4 frame. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.2.4 duration - payload duration - variable_bits(11) | This element indicates the time period in units of pulse code modulation (PCM) audio samples to which the data in the payload applies. It is an 11-bit element that can be extended by variable_bits(). NOTE: This field can indicate a sample index that extends beyond the current AC-4 frame. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.2.5 b_groupid - payload group ID flag | This Boolean indicates whether the groupid field shall follow in the bitstream. |
79462c15429e4b02e874d57a1faa88a5 | 103 190-1 | 4.3.15.2.6 groupid - payload group ID | This element provides a mechanism to indicate to a decoder that specific payloads within the EMDF substream are associated with one another and that the payload data are related. It is a 2-bit element that can be extended by variable_bits(). For payloads that are associated with each other, the groupid field for each p... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.