| 摘要 |
<p>In a coding apparatus, when coding a difference between adjacent quantization units of quantization accuracy information whose distribution range is, for example, 0 to 7, 8 is subtracted if the difference is greater than 3 and 8 is added if the difference is smaller than -4, so that two difference values whose difference is 8 are converted into the same value. Thus, the distribution range of the difference values becomes -4 to 3 and accordingly, it is possible to suppress the code book size to the same size as when no difference is extracted. Moreover, it is possible to prevent increase of the code book size by masking the most significant one bit of the difference value and replacing it with a value of the least significant three bits.</p> |
