VIDEO ENCODER, VIDEO DECODER, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD

摘要

PURPOSE: A video encoder, a video decoder, a video encoding method, and a video decoding method perform a video decoding by distinguishing a reliable channel. CONSTITUTION: A first encoding unit (100) outputs a generated syndrome bit by channel-encoding a DC conversion factor of a first frame of a video sequence. The first encoding unit selectively channel-encodes the quantized AC conversion factor of the first frame according to channel information between a video encoder and a video decoder. A second encoding unit (200) intra-encodes the key frame of the video sequence. A frame controller (300) outputs the first frame to the second encoding unit or outputs the first frame to the first encoding unit according to the channel information. [Reference numerals] (100) First encoding unit; (230) Channel coating unit; (240) Rate control unit; (400) First decoding unit; (510) Auxiliary information generating unit; (520) Auxiliary information reforming unit; (610) Distortion measuring unit; (620) Channel determining unit; (630) Channel modeling unit; (700) Channel decoding unit; (AA) Channel information; (BB) Video encoder; (CC) Initial rate information; (DD) AC syndrome; (EE) DC syndrome; (FF) Feedback channel; (GG) Video decoder