hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
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d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.1 asf_transform_info - ASF transform info | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.1.1 b_long_frame - Long frame flag - 1 bit | This bit, if set, indicates that the audio frame is a long frame. A long frame contains just one (full) block which needs to be transformed. The transform length for a long frame depends on the sampling frequency and the frame_len_base value and is given by table 97. Table 97: Transform length for long frames frame_len... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.1.2 transf_length[i] - Transform length index i - 2 bits | An audio frame contains several partial blocks if the audio frame is not a long frame. This 2-bit code indicates the transform length for partial blocks in case the frame_len_base value is greater or equal to 1 536. All partial blocks which make up the first half of a corresponding full block use index 0 and the others... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.1.3 transf_length - Transform length - 2 bits | This 2-bit code indicates the transform length for the audio block or the partial blocks in case the frame_len_base value is less than 1 536. Table 101 through table 103 show the transform length values depending on the sampling frequency and the frame_length value. Table 101: Transform length for frame_len_base < 1 53... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.2 asf_psy_info - ASF psy info | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.2.1 n_msfb_bits - Number of maxsfb bits - via table | The number of bits used for the max_sfb[i] and max_sfb_side[i] bitstream elements depends on the transform length and is specified as variable n_msfb_bits in table 104 through table 106. The variable n_side_bits, which is also specified in table 104, gives the number of bits used for the max_sfb_side[i] bitstream eleme... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.2.4 n_grp_bits - Number of grouping bits - via table | The number of grouping bits is 0 if b_long_frame=1 and the frame_len_base value is greater or equal to 1 536. If b_long_frame=0 and the frame_len_base value is greater or equal to 1 536, the number of grouping bits n_grp_bits depends on transf_length[0], transf_length[1] and the frame_len_base value and is given by tab... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.2.5 scale_factor_grouping_bit - Scale factor grouping bit - 1 bit | This 1-bit field, which is present n_grp_bits times, is used to indicate the scale factor grouping. The conversion of the scale_factor_grouping[i] array into asf_psy_info helper elements is specified in clause 4.3.6.2.6. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 80 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.2.6 asf_psy_info helper elements | The following helper elements are derived from the asf_psy_info bitstream elements, especially from the scale_factor_grouping[i] array: num_windows number of (transform) windows within the current audio frame. Possible values are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12 and 16. num_window_groups number of window groups window_t... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.3 asf_section_data - ASF section data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.3.1 sect_cb[g][i] - Section codebook - 4 bits | This 4-bit field indicates the Huffman codebook to be used for section i in group g. The values 12 to 15 do not indicate a Huffman codebook and shall not be used. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.3.2 sect_len_incr - Section length increment - 3 or 5 bits | Depending on the transform length to be used in group g, this is a 3 or 5-bit field used for determining the section length of section i in group g. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.4 asf_spectral_data - ASF spectral data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.4.1 asf_qspec_hcw - Huffman coded quantized spectral lines - variable bits | This variable length field holds Huffman coded quantized spectral lines. Either two or four spectral lines, indicated by the used Huffman codebook dimension, are coded with one codeword. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.4.2 huff_decode(hcb, hcw) - Huffman decoding | This is a function which takes a Huffman codebook table and a Huffman codeword as input and returns the index of the Huffman codeword in the Huffman codebook table. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.4.3 quad_sign_bits - Quad sign bits - 0 to 4 bits | If an unsigned Huffman codebook of dimension four is used for the quantized spectral lines, additional sign bits are transmitted for each quantized spectral line which is different to zero. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.4.4 pair_sign_bits - Pair sign bits -0 to 2 bits | If an unsigned Huffman codebook of dimension two is used for the quantized spectral lines, additional sign bits are transmitted for each quantized spectral line which is different to zero. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.4.5 ext_code - Extension code - 5 to 21 bits | This 5 to 21 bit field is an extension code which is used in connection with Huffman codebook 11. For details see clause 5.1.2. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.5 asf_scalefac_data - ASF scale factor data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.5.1 reference_scale_factor - Reference scale factor - 8 bit | This 8-bit field specifies the reference scale factor. The first scale factor used in the decoding process is equal to the reference scale factor. The remaining scale factor values are derived via delta decoding. See clause 6.2.6.4 for details. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.5.2 asf_sf_hcw - Huffman coded scale factor delta - variable bits | This variable length field holds a Huffman coded delta value used for the dpcm_sf[g][sfb] determination. See clause 6.2.6.4 for details. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.6 asf_snf_data - ASF spectral noise fill data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.6.1 b_snf_data_exists - Spectral noise fill data exists flag - 1 bit | This bit, if set, indicates that spectral noise fill data shall follow in the bitstream. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 82 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.6.6.2 asf_snf_hcw - Huffman code spectral noise fill delta - variable bits | This variable length field holds a Huffman coded delta value used for the dpcm_snf[g][sfb] determination. See clause 5.1.4 for details. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7 Speech spectral frontend | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.1 ssf_data - Speech spectral frontend data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.1.1 b_ssf_iframe - SSF I-frame flag - 1 bit | This bit, if set, indicates that the first SSF granule in the ssf_data is an SSF-I-frame. The first SSF granule in the ssf_data is an SSF-I-frame if either b_iframe in the ac4_substream_info is set or b_ssf_iframe is set. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.2 ssf_granule - Speech spectral frontend granule | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.2.1 stride_flag - Stride flag - 1 bit | This bit indicates the SSF coder mode and the number of SSF blocks per SSF granule, num_blocks, as shown in table 109. The stride_flag shall be set to '0' for SSF configurations which do not allow for a short stride mode as indicated by a value of '1' in the column "maximum number of SSF blocks" in tables 110 and 111. ... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.2.2 SSF configuration via table | The SSF configuration depends on the sampling frequency and the frame_rate_index as shown in tables 110 and 111. Table 110: SSF configuration for 48 kHz sampling frequency frame_rate_index Video frame rate (fps) Frame length (samples) frame_length SSF granule length (samples) granule_length maximum number of SSF blocks... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.2.3 num_bands_minus12 - Number of SSF coded bands minus 12 - 3 bits | This 3-bit code indicates the number of SSF coded bands minus 12. To get the number of SSF coded bands, num_bands, a value of 12 needs to be added to num_bands_minus12. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.2.4 predictor_presence_flag[b] - Predictor presence flag for block b - 1 bit | This bit indicates the existence of predictor parameters in the bitstream for block b. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.2.5 delta_flag[b] - Delta coding flag for block b - 1 bit | This bit indicates the usage of the differential coding of the prediction lag for block b. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.3 ssf_st_data - Speech spectral frontend static data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.3.1 env_curr_band0_bits - Signal envelope index for band 0 - 5 bits | This 5-bit code indicates the signal envelope index for band 0. The envelope decoder expects this value in env_idx[0]. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.3.2 env_startup_band0_bits - Startup envelope index for band 0 - 5 bits | This 5-bit code indicates the extra startup envelope index for band 0. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.3.3 gain_bits[b] - Envelope gain bits for block b - 4 bits | This 4-bit code indicates a gain index for block b. The gain index is derived by adding an offset value of -8 to the gain bits value: gain_idx[b] = gain_bits[b] - 8. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.3.4 predictor_lag_delta_bits[b] - Predictor lag delta for block b - 4 bits | This 4-bit code indicates a predictor lag delta to be used for the predictor lag index calculation for block b. See clause 5.2.4. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.3.5 predictor_lag_bits[b] - Predictor lag index for block b - 9 bits | This 9-bit code indicates the predictor lag index directly for block b. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.3.6 variance_preserving_flag[b] - Variance preserving flag for block b - 1 bit | This bit, if set, indicates that variance preserving for block b shall be used. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.3.7 alloc_offset_bits[block] - Allocation offset bits for block b - 5 bits | This 5-bit code indicates a value to be used for calculating an allocation offset for block b. See clause 5.2.5 for usage details. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 84 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.4 ssf_ac_data - Speech spectral frontend arithmetic coded data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.4.1 env_curr_ac_bits - Arithmetic coded signal envelope indices - Variable bits | This variable length field contains num_bands - 1 arithmetic coded signal envelope indices for band indices 1 to num_bands - 1. The arithmetic decoded values are stored in env_idx[band] which is an input signal of the envelope decoder. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.4.2 env_startup_ac_bits - Arithmetic coded startup envelope indices - Variable bits | This variable length field contains num_bands - 1 arithmetic coded extra startup envelope indices for band indices 1 to num_bands - 1. The startup envelope is decoded like the signal envelope and the decoded startup envelope is used as previous envelope env_prev[band] by the envelope decoder. 4.3.7.4.3 predictor_gain_a... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.7.5 SSF helper elements | The following helper elements are derived from the SSF bitstream elements: start_bin[k] vector indicating the coefficient index for the start of band k end_bin[k] vector indicating the coefficient index for the end of band k num_bins number of coded spectral coefficients The following pseudocode shows how to initialize... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8 Stereo audio processing | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8.1 chparam_info - Stereo information | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8.1.1 sap_mode - Stereo audio processing mode - 2 bits | This 2-bit code indicates the stereo audio processing mode as shown in table 112. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 85 Table 112: Stereo audio processing mode sap_mode SAP mode 0 no SAP 1 M/S processing in scale factor bands specified by ms_used[g][sfb] 2 M/S processing in all scale factor bands 3 full SAP |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8.1.2 ms_used - M/S coding used - 1 bit | This bit indicates, if set, that M/S coding is used in scale factor band sfb in group g. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8.2 sap_data - Stereo audio processing data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8.2.1 sap_coeff_all - SAP coding all flag - 1 bit | This bit indicates, if set, that SAP coding is used in all scale factor bands. If not set, SAP coding is used in scale factor bands specified by sap_coeff_used[g][sfb]. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8.2.2 sap_coeff_used - SAP coding used - 1 bit | This bit indicates, if set, that SAP coding is used in scale factor band sfb in group g. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8.2.3 delta_code_time - Delta coding in time - 1 bit | This bit indicates delta coding in time of the alpha_q values. For group g > 0, the alpha_q deltas apply to the alpha_q values from group g-1. For group g=0, or if this bit is not set, the alpha_q deltas apply to the alpha_q values from scale factor band sfb-2. See clause 5.3.1 for details. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.8.2.4 sap_hcw - Huffman coded alpha_q delta - variable bits | This variable length field holds a Huffman coded delta value used for the alpha_q[g][sfb] determination. See clause 5.3.1 for details. The same Huffman codebook as for the ASF scale factor deltas is used. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.9 Companding control | This section contains control bits for the QMF domain companding tool. It is transmitted once per frame and applies to all channels. Unless the sync_flag is set, the companding tool can be switched on or off separately for every channel; and if at least one channel has companding on, the "average mode" can be signalled... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10 Advanced spectral extension - A-SPX | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1 aspx_config - A-SPX configuration | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.1 aspx_quant_mode_env - 1 bit | This is a binary flag indicating the size of quantization steps used for encoded signal envelopes. Its values are given in table 113. See clause 5.7.6.3.5 for details. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 86 Table 113: aspx_quant_mode_env aspx_quant_mode_env Quantization step size 0 1,5 dB 1 3,0 dB |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.2 aspx_start_freq - A-SPX start QMF subband - 3 bits | This is an index into the scale factor subband group table starting from the first subband moving upwards in steps of 2 subbands. An aspx_start_freq of 1 will hence point to subband 20 for the high bit rate table. Please see clause 5.7.6.3.1.1 for more details. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.3 aspx_stop_freq - A-SPX stop QMF subband - 2 bits | This is an index into the scale factor subband group table starting from the last subband going downwards in steps of 2 subbands. An aspx_stop_freq of 2 will hence point to subband 50 in the high bit rate table. Please see clause 5.7.6.3.1.1 for more details. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.4 aspx_master_freq_scale - A-SPX master frequency table scale - 1 bit | This is a value indicating which of the two static subband group tables is to be used to generate the master subband group table, according to table 114. Table 114: aspx_master_scale aspx_master_scale Meaning 0 Low bit-rate scale factor table 1 High bit-rate scale factor table |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.5 aspx_interpolation - A-SPX interpolation used - 1 bit | This is a value determining how to estimate the energy of envelopes within an A-SPX interval. The estimation is performed by calculating the average of the squared complex subband samples over the time and frequency regions of the QMF time-frequency matrix. The meaning of aspx_interpolation is given in table 115. Pleas... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.6 aspx_preflat - A-SPX pre-flattening used - 1 bit | This value indicates whether spectral pre-flattening is used or not, according to table 116. Table 116: aspx_preflat aspx_preflat Meaning 0 Pre-flattening not used 1 Pre-flattening used |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.7 aspx_limiter - A-SPX limiter used - 1 bit | This value indicates whether the limiter is turned on or off for a particular A-SPX interval, according to table 117. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 87 Table 117: aspx_limiter aspx_limiter Meaning 0 Limiter off 1 Limiter on |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.8 aspx_noise_sbg - A-SPX number of noise subband groups - 2 bits | This is an input parameter to the function that calculates the number of noise subband groups, as detailed in clause 5.7.6.3.1.3. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.9 aspx_num_env_bits_fixfix - A-SPX frame class FIXFIX bit count - 1 bit | This is an input parameter to the aspx_framing bitstream parsing block described in clause 4.3.10.4. The parameter indicates whether 1 or 2 bits are used for the transmission of the tmp bitstream parameter in the FIXFIX interval class. In the FIXFIX inverval class the number of signal envelopes is derived from tmp as a... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.1.10 aspx_freq_res_mode - A-SPX frequency resolution transmission mode - 2 bits | This is an input parameter to the aspx_framing bitstream parsing block described in clause 4.3.10.4 and to the function that calculates the A-SPX interval borders, as outlined in clause 5.7.6.3.3.1. Table 119: aspx_freq_res_mode aspx_freq_res_mode Meaning 0 aspx_freq_res is signaled in aspx_framing 1 aspx_freq_res defa... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.2 aspx_data_1ch - A-SPX 1-channel data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.2.1 aspx_xover_subband_offset - A-SPX crossover subband offset - 3 bits | This is an index into the high bit rate subband group table starting at the first subband, moving upward with a step of 1 subband. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.3 aspx_data_2ch - A-SPX 2-channel data | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.3.1 aspx_xover_subband_offset - A-SPX crossover subband offset - 3 bits | This bitstream element has been described in clause 4.3.10.2.1. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 88 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.3.2 aspx_balance - A-SPX balance setting - 1-bit | This value indicates whether the envelope and noise scale factors of the two channels have been coded separately or paired, according to table 120. Table 120: aspx_balance aspx_balance Coding of envelope and noise scale factors 0 Separate per-channel coding 1 Paired channel coding |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4 aspx_framing - A-SPX framing | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.1 aspx_int_class - A-SPX interval class - 1, 2 or 3-bits | Four different A-SPX interval classes are signaled in the bitstream element aspx_int_class. The element is signalled using up to three bits, as indicated in table 121. Table 121: aspx_int_class aspx_int_class Value 0 FIXFIX 10 FIXVAR 110 VARFIX 111 VARVAR For the FIXFIX interval class, the following information is tran... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.2 tmp_num_env - Temporary variable - envbits + 1 bits | A temporary variable used to calculate the variable aspx_num_env described in clause 4.3.10.4.11. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.3 aspx_freq_res[ch][env] - Frequency resolution - 1-bit | The frequency resolution - low or high - for each channel and signal envelope, as shown in table 122. Table 122: aspx_freq_res aspx_freq_res Meaning 0 Low frequency resolution 1 High frequency resolution |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.4 aspx_var_bord_left[ch] - Leading VAR interval envelope border - 2-bits | Indicates the position of the leading variable time slot group border for signal envelopes for the interval classes VARFIX and VARVAR. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.5 aspx_var_bord_right[ch] - Trailing VAR interval envelope border - 2-bits | Indicates the position of the trailing variable time slot group border for signal envelopes for interval classes FIXVAR and VARVAR. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.6 aspx_num_rel_left[ch] - Relative envelope border - 1 or 2-bits | Indicates number of relative time slot group borders for signal envelopes starting from aspx_var_bord_0. 2 bits are read for frame interval class VARVAR. For classes FIXVAR and VARFIX, 2 bits are read if num_aspx_timeslots are greater than 12, otherwise 1 bit is read. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.7 aspx_num_rel_right[ch] - Relative envelope border - 1 or 2-bits | Indicates number of relative time slot group borders for signal envelopes starting from aspx_var_bord_right. 2 bits are read for frame interval class VARVAR. For classes FIXVAR and VARFIX, 2 bits are read if num_aspx_timeslots are greater than 12, otherwise 1 bit is read. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.8 aspx_rel_bord_left[ch][rel] - Leading relative envelope borders - 1 or 2 bits | Array of variables indicating the offset of the signal envelope borders relative to the leading envelope border aspx_var_bord_left. For all frame interval classes, 2 bits are read if num_aspx_timeslots are greater than 12, otherwise 1 bit is read. ETSI ETSI TS 103 190 V1.1.1 (2014-04) 90 |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.9 aspx_rel_bord_right[ch][rel] - Trailing relative envelope borders - 1 or 2 bits | Array of variables indicating the offset of the signal envelope borders relative to the trailing envelope border aspx_var_bord_right. For all frame interval classes, 2 bits are read if num_aspx_timeslots are greater than 12, otherwise 1 bit is read. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.10 aspx_tsg_ptr[ch] - Pointer to envelope border - variable bits | Pointer to a specific A-SPX time slot group border, used to determine the position of the A-SPX time slot for placing sinusoids and noise envelope borders. Please see clauses 5.7.6.3.3.1 and 5.7.6.4.2.1 for more details. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.4.11 A-SPX Framing Helper Variables | The following helper elements are derived from the A-SPX Framing elements: aspx_num_env[ch] Variable indicating the number of signal envelopes per channel aspx_num_noise[ch] Variable indicating the number of noise envelopes per channel Note that in a valid bitstream the number of signal envelopes in an A-SPX interval s... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.5 aspx_delta_dir - A-SPX delta coding direction | |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.5.1 aspx_sig_delta_dir[ch][env] - A-SPX delta coding for signal envelopes - 1 bit | The binary array indicates whether the Huffman values for the signal envelopes are coded in time or frequency direction. The meaning of an entry is given in table 124. Table 124: aspx_sig_delta_dir aspx_sig_delta_dir Meaning 0 Delta coding in frequency direction 1 Delta coding in time direction |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.5.2 aspx_noise_delta_dir[ch][env] - A-SPX delta coding for noise envelopes - 1 bit | The binary array indicates whether the Huffman values for the noise envelopes are coded in time or frequency direction. The meaning of an entry is given in table 125. Table 125: aspx_noise_delta_dir aspx_noise_delta_dir Meaning 0 Delta coding in frequency direction 1 Delta coding in time direction ETSI ETSI TS 103 190 ... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.6.1 aspx_tna_mode[n] - A-SPX subband tonal to noise ratio adjustment mode - 2 bits | The subband tonal to noise ratio adjustment mode signaled for an A-SPX interval is one of the four values shown in table 126. Table 126: aspx_tna_mode aspx_tna_mode Meaning 0 None 1 Light 2 Moderate 3 Heavy The amount of tonal to noise ratio adjustment is proportional to a value calculated based on the values of aspx_t... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.6.2 aspx_add_harmonic[n] - A-SPX add harmonics - 1 bit | This value indicates the insertion of a sinusoid in a QMF subband where there was none present in the previous A-SPX interval, according to table 127. Table 127: aspx_add_harmonic aspx_add_harmonic Meaning 0 Do not add sinusoid 1 Add sinusoid |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.6.3 aspx_fic_present - A-SPX frequency interleaved coding present - 1 bit | This value indicates the presence of frequency interleaved coding, according to table 128. Table 128: aspx_fic_present aspx_fic_present Meaning 0 Frequency interleaved coding present 1 Frequency interleaved coding present 4.3.10.6.4 aspx_fic_used_in_sfb[n] - A-SPX frequency interleaved coding used in subband group - 1 ... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.6.5 aspx_tic_present - A-SPX time interleaved coding present - 1 bit | This value indicates the presence of time interleaved coding, according to table 130. Table 130: aspx_tic_present aspx_tic_present Meaning 0 Time interleaved coding not present 1 Time interleaved coding present |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.6.6 aspx_tic_used_in_slot[n] - A-SPX time interleaved coding used in slot - 1 bit | This value indicates the use of time interleaved coding in an adjacent pair of QMF slots, according to table 131. Table 131: aspx_tic_used_in_slot aspx_tic_used_in_slot Meaning 0 Time interleaved coding not used in current slot pair 1 Time interleaved coding used in current slot pair |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.6.7 aspx_ah_present - A-SPX add harmonics present - 1 bit | This bit, if set, indicates that aspx_add_harmonic[n] data shall follow in the bitstream. 4.3.10.7 aspx_hfgen_iwc_2ch - A-SPX 2-channel HF generation and interleaved waveform coding |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.7.1 aspx_tna_mode[ch][n] - A-SPX subband tonal to noise adjustment mode - 2 bits | This bitstream element has been described in clause 4.3.10.6.1, and takes an additional channel index. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.7.2 aspx_add_harmonic[ch][n] - A-SPX add harmonics - 1 bit | This bitstream element has been described in clause 4.3.10.6.2, and takes an additional channel index. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.7.3 aspx_fic_present - A-SPX frequency interleaved coding present - 1 bit | This bitstream element has been described in clause 4.3.10.6.3. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.7.4 aspx_fic_left - A-SPX frequency interleaved coding in left channel - 1 bit | This value indicates the presence of frequency interleaved coding in the left channel, according to table 132. Table 132: aspx_fic_left aspx_fic_left Meaning 0 Frequency interleaved coding not present in left channel 1 Frequency interleaved coding present in left channel |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.7.5 aspx_fic_right - A-SPX frequency interleaved coding in right channel - 1 bit | This value indicates the presence of frequency interleaved coding in the right channel, according to table 133. Table 133: aspx_fic_right aspx_fic_right Meaning 0 Frequency interleaved coding not present in right channel 1 Frequency interleaved coding present in right channel ETSI ETSI TS 103 190 V1.1.1 (2014-04) 93 4.... |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.7.7 aspx_tic_present - A-SPX time interleaved coding present - 1 bit | This bitstream element has been described in clause 4.3.10.6.5. |
d42eb522967d110c6c642c9d4bb78e76 | 103 190 | 4.3.10.7.8 aspx_tic_copy - A-SPX time interleaved coding copy data - 1 bit | This value indicates whether or not the time interleaved data is copied to both left and right channels, according to table 134. Table 134: aspx_tic_copy aspx_tic_copy Meaning 0 Time interleaved coding not copied 1 Time interleaved coding copied |
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