LOSSLESS SCALABLE AUDIO CODEC AND AUTHOR TOOL Russian patent published in 2010 - IPC G10L19/00 

FIELD: information technology.

SUBSTANCE: audio codec codes audio data without loss into a sequence of windows for analysis in a scalable bit stream. This is done by dividing the audio data into StR and MlR parts and coding each part using different lossless algorithms. The author tool compares the buffered payload with registered payload for each window and selectively scales lossless coded audio data, corresponding MlR parts, in windows which do not conform to requirements in order to reduce the coded payload and, consequently, the buffered payload.

EFFECT: such an approach complies with limitations of rate of data transmission of carriers and buffer volume without need for filtering initial audio data, repeated coding or some other distortion of the bit stream without loss.

34 cl, 19 dwg