AUDIO CODING USING STEP-UP MIXING Russian patent published in 2013 - IPC G10L19/00 H04S3/00 

FIELD: information technologies.

SUBSTANCE: audio decoder for decoding multi-object audio signal comprises module to compute factor of forecasting matrix C consisting of factors forecasts based on data about object level difference (OLD), as well as means for step-up mixing proceeding from forecast factors for getting first upmix audio signal tending first type audio signal and/or second upmix signal tending to second type audio signal. Note here that multi-object audio signal comprises coded audio signals of first and second types. Multi-object audio signal consists of downmix signal 112 and service info. Service info comprises data on first and second type signal levels in first predefined frequency-time resolution.

EFFECT: separation of individual audio objects in mixing and decreasing/increasing channel number.

20 cl, 24 dwg