hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
|---|---|---|---|
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.2 b_dialog - Dialog substream flag - parameter | This parameter is true when the containing substream is a dialog substream, either indicated by the presentation_config or by the content_classifier. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.3 b_scale_main - Scale main flag - 1 bit | This bit, if set, indicates that scale main information is present. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.4 scale_main - Scale main - 8 bits | This 8-bit value represents a negative gain of 0 dB (0x00) to 76,2 dB (0xfe) in 0,3 dB steps. A value of 0xff indicates a full mute. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.5 b_scale_main_center - Scale main center flag - 1 bit | This bit, if set, indicates that scale main center information is present. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.6 scale_main_center - Scale main center - 8 bits | This 8-bit value represents a negative gain of 0 dB (0x00) to 76,2 dB (0xfe) in 0,3 dB steps. A value of 0xff indicates a full mute. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.7 b_scale_main_front - Scale main front flag - 1 bit | This bit, if set, indicates that scale main front information is present. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.8 scale_main_front - Scale main front - 8 bits | This 8-bit value represents a negative gain of 0 dB (0x00) to 76,2 dB (0xfe) in 0,3 dB steps. A value of 0xff indicates a full mute. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.9 pan_associated - Associate pan data- 8 bits | This 8-bit value represents an angle from 0 (0x00) to 358,5 (0xef) degrees in 1,5 degree steps. The values 0xf0…0xff shall not be used. The angle is to be interpreted as 0 being the front direction, increasing angle seen clockwise (standard Right speaker at +30 degree (0x14)). |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.10 b_dialog_max_gain - Dialog max gain flag - 1 bit | This bit, if set, indicates that a dialog_max_gain element is present and shall follow in the bitstream. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.11 dialog_max_gain - Dialog max gain - 2 bits | This 2-bit field indicates the maximum gain, g_dialog_max, by which a user might change the dry main / dialog balance in favour of the dialog. g_dialog_max is determined via _ _ max = (1 + _max _ ) × 3 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.12 b_pan_dialog_present - Dialog pan data present flag - 1 bit | This bit, if set, indicates that dialog pan data is present and shall follow in the bitstream. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 107 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.13 pan_dialog - Dialog pan data - 8 bit | This 8-bit field indicates an angle, used for panning one or two dialog signals onto the dry main track. The semantics are the same as for pan_associated. See clause 4.3.12.4.9. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.14 reserved - Reserved - 2 bits | This 2-bit field is reserved for future use. A decoder conforming to the present document shall ignore this field. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.15 b_channels_classifier - Channel classifier flag - 1 bit | This bit, if set, indicates that channel classification data is available. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.16 b_{c,l,r,ls,rs,lrs,rrs,lw,rw,vhl,vhr,lfe}_active - Channel active flag - 1 bit | This bit, if set, indicates that the corresponding channel, C, L, R, Ls, Rs, Lrs, Rrs, Lw, Rw, Vhl, Vhr or LFE, is active. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.17 b_{c,l,r}_has_dialog - Channel has dialog flag - 1 bit | This bit, if set, indicates that the corresponding channel, C, L or R, contains a dialog. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.18 b_event_probability_present - Event probability present flag - 1 bit | This bit indicates whether an event probability value is transmitted. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.4.19 event_probability - Event probability - 4 bits | This field indicates the probability that a congruent audio event is ongoing. A high value corresponds to a high certainty. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.5 Channel mode query functions | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.5.1 channel_mode_contains_Lfe() | This function returns true if the channel mode contains a Low-Frequency Effects channel. Pseudocode channel_mode_contains_Lfe() { if (ch_mode == 4 || ch_mode == 6 || ch_mode == 8 || ch_mode == 10) { return TRUE; } return FALSE; } |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.5.2 channel_mode_contains_c() | This function returns true if the channel mode contains a Center channel. Pseudocode channel_mode_contains_c() { if (ch_mode == 0 || (ch_mode >= 2 && ch_mode <= 10)) { return TRUE; } return FALSE; } ETSI ETSI TS 103 190 V1.1.1 (2014-04) 108 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 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 channel_mode_contains_lr() { if (ch_mode >= 1 && ch_mode <= 10) { return TRUE; } return FALSE; } |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 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 channel_mode_contains_LsRs() { if (ch_mode >= 3 && ch_mode <= 10) { return TRUE; } return FALSE; } |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.5.5 channel_mode_contains_LrsRrs() | This function returns true if the channel mode contains a Left Rear Surround and a Right Rear Surround channel. Pseudocode channel_mode_contains_LrsRrs() { if (ch_mode == 5 || ch_mode == 6) { return TRUE; } return FALSE; } |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 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 channel_mode_contains_LwRw() { if (ch_mode == 7 || ch_mode == 8) { return TRUE; } return FALSE; } |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.12.5.7 channel_mode_contains_VhlVhr() | This function returns true if the channel mode contains a Left Vertical Height and a Right Vertical Height channel. Pseudocode channel_mode_contains_VhlVhr() { if (ch_mode == 9 || ch_mode == 10) { return TRUE; } return FALSE; } ETSI ETSI TS 103 190 V1.1.1 (2014-04) 109 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13 Dynamic range control - DRC | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.1 drc_frame - Dynamic Range Control | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.1.1 b_drc_present - DRC present - 1 bit | This field indicates if DRC data is available in the bitstream. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.2 drc_config - DRC configuration | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.2.1 drc_decoder_nr_modes - Number of DRC decoder modes - 3 bits | This field indicates the number of DRC decoder modes carried in drc_frame, which is drc_decoder_nr_modes + 1. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.2.2 drc_eac3_profile - (E-)AC-3 profile - 3 bits | This field indicates which (E-)AC-3 profile to use when transcoding an AC-4 stream into (E-)AC-3. Table 154 shows how the values of this field are related to the (E-)AC-3 profile. Table 154: (E-)AC-3 profiles drc_eac3_profile Profile 0 None 1 Film standard 2 Film light 3 Music standard 4 Music light 5 Speech 6 Reserved... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3 drc_decoder_mode_config - DRC decoder mode_config | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3.1 drc_decoder_mode_id - DRC decoder mode ID - 3 bits | This 3 bit field identifies DRC decoder mode IDs as shown in table 155. Table 155: 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 7 Rese... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3.2 drc_output_level_from - Lowest reference output level - 5 bits | This field 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 , = −drc_output_level_from [dB] The output range for the default DRC decoder modes is defined in table 155. E... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3.3 drc_output_level_to - Highest reference output level - 5 bits | This field 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: , = −drc_output_level_to [dB] The output range for the default DRC decoder modes is defined in table 155. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3.4 drc_repeat_profile_flag - Repeat profile flag - 1 bit | This bit indicates the presence of the drc_repeat_id, described in clause 4.3.13.3.5. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3.5 drc_repeat_id - Repeat data from ID - 3 bits | When the configuration of two or more DRC decoder modes is identical, this field provides an option to duplicate the configuration without signalling it twice. If this field is sent, this DRC decoder mode is defined by the mode with ID drc_repeat_id. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3.6 drc_default_profile_flag - Default profile flag - 1 bit | This bit indicates that the (E-)AC-3 profile [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 156. NOTE 1: Semantics for the compression curve parameters are given in clause 4.3.13.4. Table 156: (E-)AC-... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3.7 drc_compression_curve_flag - Compression curve flag - 1 bit | This bit indicates whether a compression curve is transmitted for the current DRC decoder mode (drc_compression_curve_flag=1) or compression gains are transmitted by drc_frame (drc_compression_curve_flag=0). |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.3.8 drc_gains_config - DRC gains configuration - 2 bits | This field indicates the manner in which configuration 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 157, and the definitions for configurations 2 and 3 are listed in table 158. Table 157: Des... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4 drc_compression_curve - Compression curve parameters | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.1 DRC compression curve parameterization | Figure 1 shows the parameterization 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 dialnorm, i.e. a level of zero is at the reference level. The curve has bo... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.2 drc_lev_nullband_low - Null band lower boundary - 4 bits | This field defines the lower limit of the null-band. See table 160. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.3 drc_lev_nullband_high - Null band higher boundary - 4 bits | This field defines the upper limit of the null-band. See table 160. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.4 drc_gain_max_boost - Maximum boost - 4 bits | This field defines the maximum boost gain. See table 160. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 115 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.5 drc_lev_max_boost - Start of maximum boosting - 5 bits | This field defines the upper limit of the maximum boost section. See table 160. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.6 drc_nr_boost_sections - Number of boost sections - 1 bit | This field controls the number of boost sections. See table 160. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.7 drc_gain_section_boost - Extra boost section gain - 4 bits | This field defines an extra control point gain. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.8 drc_lev_section_boost - Extra boost section control point level - 5 bits | This field defines an extra control point level. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.9 drc_gain_max_cut - Maximum cut - 5 bits | This field defines the maximum cut gain. See table 160. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.10 drc_lev_max_cut - Start of maximum cutting - 6 bits | This field defines the upper limit of the maximum cut section. See table 160. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.11 drc_nr_cut_sections - Number of cut sections - 1 bit | This field controls the number of cut sections. See table 160. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.12 drc_gain_section_cut - Extra cut section gain - 5 bits | This field defines an extra control point gain. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.13 drc_lev_section_cut - Extra cut section control point level - 5 bits | This field defines an extra control point level. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.14 drc_tc_default_flag - DRC default time constants flag - 1 bit | 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 161 is used. Table 161: Default smoothing data Field Value 100 ms 3 000 ms , 10 ms , 1 ... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.15 drc_tc_attack - Time constant for attacks - 8 bits | This field defines the time constant for smoothing during attacks. The time constant is given by: = drc_tc_attack × 5[ms] ETSI ETSI TS 103 190 V1.1.1 (2014-04) 116 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.16 drc_tc_release - Time constant for release - 8 bits | This field defines the time constant for smoothing during signal release. The time constant is given by: = drc_tc_release × 40[] |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.17 drc_tc_attack_fast - Time constant fast attacks - 8 bits | This field defines the time constant for smoothing during fast attacks. The time constant is given by: , = drc_tc_attack_fast × 5[ms] |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.18 drc_tc_release_fast - Time constant for fast release - 8 bits | This field defines the time constant for smoothing during fast signal release. The time constant is given by: , = drc_tc_release_fast × 20[] |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.19 drc_adaptive_smoothing_flag - Adaptive smoothing flag - 1 bit | This bit indicates whether adaptive smoothing is supported by the profile. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.20 drc_attack_threshold - Fast attack threshold - 5 bits | This field indicates the threshold in dB for deciding when to switch to the fast attack time constant. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.4.21 drc_release_threshold - Fast release threshold - 5 bits | This field indicates the threshold in dB for deciding when to switch to the fast release time constant. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.5 drc_data - DRC frame-based data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.5.1 drc_gainset_size_value - Gain set data size - 6 bits | This field, potentially extended with variable_bits, codes drc_gainset_size. 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. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.5.2 b_more_bits - More bits flag - 1 bit | This bit indicates the presence of additional variable_bits to be used for the drc_gainset_size determination. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.5.3 drc_version - DRC version - 2 bits | This 2-bit field 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 '00', and thus the drc2_bits field shall not be present in the payload. A decoder implemented in accordance to the present document shall skip the drc2_bits f... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.5.5 drc_reset_flag - DRC reset flag - 1 bit | This field signals a reset of the DRC algorithm. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 117 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.5.6 drc_reserved - Reserved bits - 2 bits | This 2-bit field is reserved for future use and the content shall be skipped by an AC-4 decoder conforming to the present document. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.6 drc_gains - DRC gains | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.6.1 drc_gain_val - DRC gain - 7 bits | This field contains the first DRC gain. = drc_gain_val −64 [ ] 4.3.13.6.2 drc_gain_code - DRC gain codeword - 1…x bits This field contains a Huffman code. The function huff_decode_diff() looks up the Huffman code using the Huffman code book DRC_HCB specified in table A.62 and generates a differential DR... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.7 DRC helper elements | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.13.7.1 nr_drc_channels - Number of DRC channels | The variable nr_drc_channels 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 162. Table 162: nr_drc_channels Channel config nr_drc_channels Group 1 Group 2 Group 3 Mono 1 C Stereo 1 L, R ... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 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 163 lists the supported frame lengths and the corresponding number of DRC subframes. Table 163: 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... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14 Dialog enhancement - DE | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.1 b_de_data_present - Dialog enhancement data present flag - 1 bit | This bit indicates whether dialog enhancement data is present in the bitstream. In case an audio signal contains dialog, it is mandatory that dialog enhancement data is present, i.e. b_de_data_present shall be true for all frames. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.2 de_config_flag - Dialog enhancement configuration flag - 1 bit | This bit indicates whether a frame that is not an I-frame contains dialog enhancement configuration data. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.3 de_config - Dialog enhancement configuration | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.3.1 de_method - Dialog enhancement method - 2 bits | This field indicates the dialog enhancement method as shown in table 164. Table 164: Description of de_method values Value de_method 0 Channel independent dialog enhancement 1 Cross-channel dialog enhancement 2 Waveform-parametric hybrid; channel independent enhancement and waveform channel 3 Waveform-parametric hybrid... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.3.2 de_max_gain - Maximum dialog enhancement gain - 2 bits | This field defines the maximum gain (Gmax) allowed for boosting the dialog: = de_max_gain + 1 × 3 [ ] |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.3.3 de_channel_config - Channel configuration - 3 bits | This field provides a three bit mask for the three front channels of a multichannel signal to indicate for which channels dialog enhancement parameters are transmitted. For mono and stereo content a subset of the values is supported. Table 165 provides an overview with 'X' indicating allowed values, and defines the cor... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.4 de_data - Dialog enhancement data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.4.1 de_keep_pos_flag - Keep position flag - 1 bit | This binary flag indicates whether the dialog panning information of the previous frame should be repeated for the current frame. For I-frames, this flag defaults to zero. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 119 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.4.2 de_mix_coef1_idx, de_mix_coef2_idx - Dialog panning parameters - 5 bits | These fields define the mixing of the dialog signal onto the first, second and potentially third channel processed by the dialog enhancement tool. Up to two parameters are decoded using the quantization vector defined in table 166. The last coefficient is always derived considering an energy preserving upmix. Table 166... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.4.3 de_keep_data_flag - Keep data flag - 1 bit | This bit indicates whether the latest transmitted parametric data shall be repeated for the current frame. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.4.4 de_ms_proc_flag - M/S processing flag - 1 bit | This bit indicates whether the parameters are related to processing on the Mid/Side representation of the signal. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.4.5 de_par_code - Parameter code - 1...x bits | This field contains a Huffman code indicating a dialog enhancement parameter, representing either an absolute parameter quantization index or a differential value. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.4.6 de_signal_contribution - Contribution of the signal to the enhancement - 5 bits | This field 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. , = de_signal_contribution ∙!10 −1 , = de_signal_contribution ∙10 −1 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.5 DE helper elements | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.5.1 de_nr_bands - Number of parameter bands | This constant value indicates the number of dialog enhancement parameter bands, which is always 8 bands. The QMF band grouping for each dialog enhancement parameter band is shown in table 167. Table 167: Dialog enhancement parameter band definition DE parameter band First QMF band Last QMF band 0 0 0 1 1 1 2 2 3 3 4 6 ... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.5.2 de_par[ ][ ] - Dialog enhancement parameter set | Variable that contains the decoded quantization indices to the dialog enhancement parameters for de_nr_channels and de_nr_bands. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.14.5.3 de_par_prev[ ][ ] - Previous dialog enhancement parameter set | Variable that contains the decoded quantization indices to the dialog enhancement parameters for the previous frame. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 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 dialog 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. Pseudocode de_abs_huffman(table_idx, code) { if (table_idx == 0) { hcb = DE_HCB_ABS_0; ... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 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 de_diff_huffman(table_idx, code) { if (table_idx == 0) { hcb ... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.15 Universal metadata | The Universal Metadata (UMD) 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 UMD substream is undefined - payloads can be stored in any order, and... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.15.1 umd_payloads_substream - Universal metadata payloads substream | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.15.1.1 umd_payload_id - UMD payload identification - 5 bits/variable_bits(5) | The 5-bit umd_payload_id field which is extendable by variable_bits() identifies the type of payload that follows in the UMD substream. The assignment of umd_payload_id field values to specific payload types is specified in table 168. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 121 Table 168: Defined UMD payload types umd_pa... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.15.1.2 umd_payload_size - Size of UMD payload - variable_bits(8) | The umd_payload_size field indicates the size of the following payload. The value of the umd_payload_size field shall be equal to the number of bytes in the following payload, excluding the umd_payload_size field and all fields in umd_payload_config. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.15.1.3 umd_payload_byte - UMD payload byte - 8 bits | The sequence of umd_payload_size umd_payload_byte values forms the UMD payload. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.15.2 umd_payload_config - Universal metadata payload configuration |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.