Video data self-adapting partition device in encoder

The invention provides a video data self-adapting dividing device in an encoder, wherein, the encoder receives channel data; the video data self-adapting dividing device divides M video frames; one ora plurality of video units are obtained after respectively dividing each video frame; each video unit comprises a plurality of macro blocks; the video units are then used for filling data blocks of physical layers, and each physical layer is guaranteed to comprise a plurality of video units. The video data self-adapting dividing device of the invention is combined with the characteristics of physical channels through self-adapting dividing video data units and by full utilization of data dividing method of information sources and meets as possible the requirement that an image strip or a subdivision is filled in a physical data package, thereby video errors are isolated in the image strip or the subdivision under the condition of abnormality of channels, consequently the invention has theadvantages of effective avoidance of expansion of image flaws, improvement of image subjective quality and obvious improvement of anti-error capacity of video data.