BIT STREAM RELOCATING/RECONSTRUCTING METHOD AND DATA COMPRESSION/DECOMPRESSION SYSTEM THEREFOR FOR DIGITAL VIDEO TAPE RECORDER

摘要

When the code amount of the bit stream generated as a result of variable length encoding of the macroblocks included in the segment exceeds the allowable capacity of the segment, the excess bit amount is preserved as much as possible to maintain compatibility with the existing SD-VCR. An improved bitstream arrangement / restoration method that ensures reproducible quality, and a data compression and decompression device suitable therefor are disclosed.;The method for arranging bitstreams according to the present invention comprises: arranging a bitstream of each DCT block generated as a result of quantizing and variably encoding the DCT data of each DCT block in a DCT block in the macroblock; A rearrangement process in the macroblock for rearranging the remaining bits in the DCT block in another DCT block in the macroblock; An intra-segment placement process of rearranging bits remaining in the macro-block rearrangement process between macro blocks in the segment; And an inter-segmental relocation step of relocating the remaining bit amount in the intra-segment relocation process to another segment having a macroblock having the same content as a previous or subsequent frame.;In the bitstream arrangement method according to the present invention, when the amount of bits remaining in a segment unit is generated, it is propagated to and recorded in adjacent segments, thereby preventing the degradation of reproduction quality.