AUDIO ENCODER, AUDIO DECODER AND AUDIO PROCESSOR, HAVING DYNAMICALLY VARIABLE WARPING CHARACTERISTIC Russian patent published in 2011 - IPC G10L19/00 

FIELD: information technology.

SUBSTANCE: audio encoder, audio decoder or audio processor includes a filter (12) for generating a filtered audio signal, the filter having a variable warping characteristic, the characteristic being controllable in response to a time-varying control signal (16), the control signal indicating a small or no warping characteristic or a comparatively high warping characteristic. Furthermore, a controller (18) is connected for providing the time-varying control signal, which depends on the audio signal. The filtered audio signal can be introduced to an encoding processor (22) having different encoding algorithms, one of which is a coding algorithm adapted to a specific signal pattern. Alternatively, the filter is a post-filter receiving a decoded audio signal.

EFFECT: obtaining an improved general purpose encoding concept which provides high quality and low bitrate.

49 cl, 12 dwg