| 摘要 |
<p>A method for allocating and restoring a bit-stream, in which when the code amount of the bit-stream generated as a result of variable-length encoding with respect to macro blocks included in a segment exceeds an allowable segment capacity, the excess bit amount is maintained at its maximum in a range where compatibility with a conventional SD-VCR is guaranteed, to thereby improve the quality of a reproduced image, and data compressing/decompressing apparatuse suitable for the methods is provided. The method for allocating the bit-stream includes the steps of: (a) allocating the bit-stream of each DCT block, generated as a result of quantizing and variable-length encoding the DCT coefficient of each DCT block, to DCT block within the macro block; (b) reallocating the bits remaining during the step (a) to another DCT block within macro block; (c) reallocating the bits remaining during the step (b) to another macro block within the segment; (d) reallocating the bits remaining during the step (d) to another segment having the macro block of the same content as that of previous or following frame. In this method for allocating the bit-stream, when a remaining bit amount in a segment unit is generated, the remaining bit amount is propagated to an adjacent segment and is recorded therein so that deterioration of the reproduced screen can be prevented. <IMAGE></p> |
