FIELD: information technologies.
SUBSTANCE: multichannel audio coder (10) codes M-channel audio signal. Generation facility (110) generates the first coded M-channel signal, for instance, spatial stereophonic step-down mixing, for N-channel signal (N>M). Units (115, 116, 117) generate associatively related parametric data for the first M-channel signal relative to N-channel audio signal. The second M-channel signal, such as artistic stereo rerecording, is generated for N-channel signal. Then generator (123) generates modifying parametres for the second M-channel signal relative to the first M-channel signal. Unit (120) generates coded output signal containing the second M-channel signal, associatively related parametric data and modifying parametres. Generator (123) may dynamically choose between generation of modifying parametres as absolute modifying data or as relative modifying data relative to the second M-channel signal. Decoder (20) may perform reverse operation and may apply modifying parametres as absolute or relative modifying parametres depending on indication in received bit stream.
EFFECT: improved efficiency, quality and ratio of quality to speed of data transfer.
33 cl, 11 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| MULTI-CHANNEL AUDIO DECODER, MULTI-CHANNEL AUDIO ENCODER, METHODS, COMPUTER PROGRAM AND ENCODED AUDIO REPRESENTATION USING A DECORRELATION RENDERED AUDIO SIGNALS | 2014 |
|
RU2665917C2 |
| MULTICHANNEL AUDIO DECODER, MULTICHANNEL AUDIO ENCODER, METHODS AND COMPUTER PROGRAM USING RESIDUAL-SIGNAL-BASED ADJUSTMENT OF CONTRIBUTION OF DECORRELATED SIGNAL | 2014 |
|
RU2676233C2 |
| ADAPTIVE RESIDUAL AUDIO CODING | 2006 |
|
RU2380766C2 |
| AUDIO CODER FOR CODING MULTI-CHANNEL SIGNAL AND AUDIO CODER FOR DECODING CODED AUDIO SIGNAL | 2016 |
|
RU2680195C1 |
| AUDIO CODER FOR CODING MULTI-CHANNEL SIGNAL AND AUDIO CODER FOR DECODING CODED AUDIO SIGNAL | 2016 |
|
RU2679571C1 |
| MULTI-CHANNEL DECORRELATOR, MULTI-CHANNEL AUDIO DECODER, MULTI-CHANNEL AUDIO ENCODER, METHODS AND COMPUTER PROGRAM USING PREMIX OF DECORRELATOR INPUT SIGNALS | 2014 |
|
RU2666640C2 |
| AUDIO SIGNAL PROCESSING METHOD, SIGNAL PROCESSING UNIT, STEREOPHONIC RENDER, AUDIO CODER AND AUDIO DECODER | 2014 |
|
RU2642376C2 |
| DEVICE AND METHOD FOR FORMING OF MULTICHANNEL SIGNAL OR SET OF PARAMETRIC DATA | 2005 |
|
RU2355046C2 |
| AUDIO DECODING | 2007 |
|
RU2420814C2 |
| AUDIO CODING AND DECODING | 2007 |
|
RU2427978C2 |
