FIELD: acoustics.
SUBSTANCE: invention relates to acoustics. A device for outputting a stereo audio signal having a left channel and a right channel, the device comprising: a demultiplexer configured to receive a bit audio stream and extract a prediction coefficient from it for each of the plurality of frequency bands; a decoder configured to generate a downmix signal and a residual signal from the encoded bitstream; and an upmix device configured to operate in either prediction mode or prediction mode based on a parameter encoded in the bit audio stream, and outputting the left channel and the right channel as a stereo audio signal, wherein when the upmix device operates in prediction mode, residual signal represents the difference between the side signal and the predicted version of the side signal, and the upmix device generates a left channel and a right channel from the combination of the downmix signal, the residual signal and the prediction coefficients for each of the plurality of frequency bands, and where, when the upmix device operates in a prediction-free mode, the residual signal represents a side signal, the upmix device generates a left channel based on the sum of the downmix signal and the residual signal transmitted through the decoder, and the upmix device generates a right channel based on the difference between the downmix signal and the residual signal transmitted through the decoder.
EFFECT: reduced computational complexity.
16 cl, 1 tbl, 16 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| AUDIO UPMIXING DEVICE WITH POSSIBILITY OF OPERATING IN A MODE WITH OR WITHOUT PREDICTION | 2023 |
|
RU2803142C1 |
| AUDIO UPMIXING DEVICE WITH THE POSSIBILITY OF OPERATING IN THE MODE WITH/WITHOUT PREDICTION | 2020 |
|
RU2799737C2 |
| AUDIO UPMIXING DEVICE PERFORMED WITH THE POSSIBILITY OF OPERATING IN THE MODE WITH/WITHOUT PREDICTION | 2023 |
|
RU2798024C1 |
| 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 |
|
RU2554844C2 |
| MDCT-BASED COMPLEX PREDICTION STEREO CODING | 2011 |
|
RU2559899C2 |
| 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 |
