FIELD: acoustics.
SUBSTANCE: invention relates to means of generating noise in audio codecs. Audio encoder includes background noise estimation module configured to determine parametric assessment of background noise on the basis of representation in the form of spectral decomposition of input audio signal so that parameter estimate of background noise spectral describes spectral envelope background noise input audio signal. Audio encoder includes an encoder for encoding an input audio signal into a data stream for active phase. Audio encoder has a detector configured to detect input in inactive phase after active phase based on an input signal. Audio encoder can encode the data stream parametric assessment of background noise in the inactive phase.
EFFECT: technical result consists in reducing the bit rate and improved quality of the generated noise.
18 cl, 13 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| AUDIO CODEC USING SYNTHETIC NOISE DURING INACTIVE PHASE | 2012 |
|
RU2586838C2 |
| GENERATION OF A COMFORT NOISE WITH HIGH SPECTRO-TEMPORAL RESOLUTION IN DISCONTINUOUS TRANSMISSION OF AUDIO SIGNALS | 2013 |
|
RU2650025C2 |
| MULTICHANNEL SIGNAL GENERATOR, AUDIO ENCODER AND RELATED METHODS BASED ON MIXING NOISE SIGNAL | 2021 |
|
RU2809646C1 |
| AUDIO SIGNAL CODING AND DECODING DEVICE USING FREQUENCY-DOMAIN PROCESSOR, TIME-DOMAIN PROCESSOR AND CROSS-PROCESSOR FOR CONTINUOUS INITIALIZATION | 2015 |
|
RU2668397C2 |
| AUDIO ENCODER AND DECODER USING FREQUENCY DOMAIN PROCESSOR WITH FULL-BAND GAP FILLING AND TIME DOMAIN PROCESSOR | 2015 |
|
RU2671997C2 |
| DEVICE, METHOD AND COMPUTER PROGRAM FOR ENCODING AUDIO SIGNAL OR FOR DECODING ENCODED AUDIO SCENE | 2021 |
|
RU2809587C1 |
| APPARATUS AND METHOD FOR DECODING OR ENCODING AN AUDIO SIGNAL USING ENERGY INFORMATION VALUES FOR A RECONSTRUCTION BAND | 2014 |
|
RU2649940C2 |
| DEVICE AND METHOD FOR DECODING AND CODING OF AUDIO SIGNAL USING ADAPTIVE SELECTION OF SPECTRAL FRAGMENTS | 2014 |
|
RU2643641C2 |
| DEVICE AND METHOD FOR CODING OR DECODING SOUND SIGNAL WITH INTELLIGENT FILLING OF INTERVALS IN SPECTRAL AREA | 2014 |
|
RU2635890C2 |
| AUDIO CODER, AUDIO DECODER AND RELATED METHODS USING TWO-CHANNEL PROCESSING IN INFRASTRUCTURE OF INTELLECTUAL FILLING INTERVALS OF SIGNAL ABSENCE | 2014 |
|
RU2646316C2 |
