The invention provides an out-
chip buffer
compression method for a superhigh-definition
processing system, and the method comprises the steps: compression: grouping video frame data from an original video input end and video frame data from a
processing core during the completing of a
video processing function so as to form a to-be-compressed block, carrying out the in-block pixel grouping, prediction, quantification, reverse quantification, pixel reconstruction, entropy coding, code
stream packaging, compression simplifying and compressed code
stream output control operation of each to-be-compressed block, obtaining a compressed code
stream, and enabling the compressed code stream to be written into an out-
chip buffer; decompression: reading a compressed code stream from the out-
chip buffer, carrying out real-time decoding after code stream analysis, entropy decoding, reverse quantification, pixel forming, simplified compression decoding and pixel block restoration, forming a decompressed pixel block, and enables the decompressed pixel block to be outputted to the
processing core and an output display module. The method can greatly reduce the bandwidth of the out-chip buffer, and improves the data
throughput rate of the
system.