LOSSLESS MULTI-CHANNEL AUDIO CODEC USING ADAPTIVE SEGMENTATION WITH RANDOM ACCESS POINT (RAP) AND MULTIPLE PREDICTION PARAMETER SET (MPPS) CAPABILITY Russian patent published in 2013 - IPC G10L19/00 H04S3/00 

FIELD: information technology.

SUBSTANCE: invention relates to lossless multi-channel audio codec which uses adaptive segmentation with random access point (RAP) and multiple prediction parameter set (MPPS) capability. The lossless audio codec encodes/decodes a lossless variable bit rate (VBR) bit stream with random access point (RAP) capability to initiate lossless decoding at a specified segment within a frame and/or multiple prediction parameter set (MPPS) capability partitioned to mitigate transient effects. This is accomplished with an adaptive segmentation technique that fixes segment start points based on constraints imposed by the existence of a desired RAP and/or detected transient in the frame and selects a optimum segment duration in each frame to reduce encoded frame payload subject to an encoded segment payload constraint. RAP and MPPS are particularly applicable to improve overall performance for longer frame durations.

EFFECT: higher overall encoding efficiency.

48 cl, 23 dwg