Encoding method, and encoding apparatus, and decoding method...

Details Encoding method, and encoding apparatus, and decoding method... Encoding method, and encoding apparatus, and decoding method...

2006-02-07

2006-02-07

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from differential codes

C341S077000, C704S225000, C704S229000

Reexamination Certificate

active

06995699

ABSTRACT:
In an encoding apparatus, when difference value between adjacent quantization units of quantization accuracy information where, e.g., distribution range is 0˜7, e.g., if difference value is 3 or more, 8 is subtracted, and if difference value is less than −4, 8 is added to thereby transform two difference values where difference therebetween is 8 into the same value. Thus, the distribution range of difference value becomes −4˜3, and size of code book (table) can be held down to the same size in the case where difference is not taken. In addition, high order 1 bit of difference value may be masked to carry out replacement into value consisting of only low order 3 bits, thus also making it possible to prevent increase in size of code book (table).

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