FIELD: means for encoding and decoding audio.
SUBSTANCE: spectral area of peaks (802) is detected in upper frequency range of audio signal. Lower frequency range of the audio signal is generated (804) using the formation information for the lower frequency band. Upper frequency band of the audio signal is generated (1702) using at least part of generation information for the lower frequency band. Formation of upper frequency range includes additional attenuation (1704) of spectral value in detected spectral area of peaks in upper frequency range. Formed lower frequency band and formed upper frequency band are quantized and quantized spectral values are encoded entropy from the formed lower frequency band and formed upper frequency range.
EFFECT: technical result consists in improved efficiency of coding.
26 cl, 14 tbl, 18 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CONTROLLING THE FREQUENCY BAND IN ENCODERS AND DECODERS | 2018 |
|
RU2752520C1 |
| APPARATUS AND METHOD FOR ENCODING AND DECODING AN AUDIO SIGNAL USING DOWNSAMPLING OR INTERPOLATION OF SCALE PARAMETERS | 2018 |
|
RU2762301C2 |
| AUDIO ENCODER AND DECODER | 2015 |
|
RU2696292C2 |
| APPARATUS AND METHOD FOR ENCODING AND DECODING AUDIO SIGNAL USING ALIGNED LOOK-AHEAD PORTION | 2012 |
|
RU2574849C2 |
| DEVICE AND METHOD FOR ENCODING/DECODING FOR HIGH-FREQUENCY BAND EXTENSION | 2011 |
|
RU2575680C2 |
| AUDIO SIGNAL ENCODING DEVICE AND METHOD USING COMPENSATION VALUE | 2017 |
|
RU2727728C1 |
| DEVICE AND METHOD FOR ENCODING/DECODING FOR EXPANSION OF HIGH FREQUENCY RANGE | 2017 |
|
RU2672133C1 |
| CODING OF SPECTRAL COEFFICIENTS OF AUDIO SIGNAL SPECTRUM | 2014 |
|
RU2638734C2 |
| PRINCIPLE FOR CODING AUDIO SIGNAL AND DECODING AUDIO USING DETERMINED AND NOISE-LIKE DATA | 2014 |
|
RU2644123C2 |
| AUDIO CODER AND DECODER | 2019 |
|
RU2793725C2 |
