FIELD: computer technology.
SUBSTANCE: effect is achieved by calculating the second representation of the downmix signal in the frequency domain based on its first representation in the frequency domain, and the second representation in the frequency domain includes the second spectral components representing the spectral composition of the signal expressed in the second subspace of the multidimensional space, which includes a part of the multidimensional space not included in the first subspace, wherein the second spectral components of the downmix signal are determined by applying a finite impulse response (FIR) filter to the first spectral components of the downmix signal; calculating the side signal (S) based on the first and second representations of the downmix signal in the frequency domain, the first representation of the residual signal in the frequency domain, and the complex prediction factor (α) encoded in the bitstream signal; and calculating a stereo signal based on the first representation of the frequency domain downmix signal and the side signal.
EFFECT: increase in audio processing efficiency.
20 cl, 19 dwg, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| AUDIO UPMIXING DEVICE PERFORMED WITH THE POSSIBILITY OF OPERATING IN THE MODE WITH/WITHOUT PREDICTION | 2023 |
|
RU2798024C1 |
| AUDIO UPMIXING DEVICE WITH THE POSSIBILITY OF OPERATING IN THE MODE WITH/WITHOUT PREDICTION | 2020 |
|
RU2799737C2 |
| AUDIO UPMIX DEVICE CONFIGURED TO OPERATE IN PREDICTION MODE OR IN MODE WITHOUT PREDICTION | 2019 |
|
RU2717387C1 |
| STEREOPHONIC CODING BASED ON MDCT WITH COMPLEX PREDICTION | 2011 |
|
RU2683175C2 |
| STEREOPHONIC CODING BASED ON MDCT WITH COMPLEX PREDICTION | 2019 |
|
RU2698154C1 |
| MDCT-BASED COMPLEX PREDICTION STEREO CODING | 2011 |
|
RU2559899C2 |
| MDCT-BASED COMPLEX PREDICTION STEREO CODING | 2011 |
|
RU2554844C2 |
| MDCT-BASED COMPLEX PREDICTION STEREO CODING | 2011 |
|
RU2525431C2 |
| AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS OF PROCESSING MULTICHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION | 2011 |
|
RU2577195C2 |
| AUDIO OR VIDEO ENCODER, AUDIO OR VIDEO AND RELATED METHODS OF PROCESSING MULTI-CHANNEL AUDIO OR VIDEO SIGNALS USING VARIABLE PREDICTION DIRECTION | 2011 |
|
RU2541864C2 |
