CODE BOOK SELECTION METHOD AND CODE BOOK SELECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To select an optimum code book used for codes.;SOLUTION: The number of coded bits is stored in a bit number table specified by a code book number and a scale factor band number; a bit cost value is stored in accumulative value memory as an accumulative value; a value adding the bit cost value to the minimum accumulative value is stored in threshold value memory. When the accumulative value is larger than the threshold value, the accumulative value is stored in the accumulative value memory as a new accumulative value, and also a code book number for this minimum accumulative value is stored in a link table. Meanwhile, when the accumulative value is the threshold value or smaller, the last code book number is stored in the link table as a code book number for this time; and a value adding the accumulative value to the number of bits is updated as a new accumulative value. The optimum code book number is determined by referring to the link table and sequentially pursuing the code book number, with which the number of bits in the bit number table corresponds to the minimum number of bits, from a high order scale factor band number.;COPYRIGHT: (C)2007,JPO&INPIT