发明名称 |
AUDIO ENCODING APPARATUS, AUDIO DECODING APPARATUS, AUDIO ENCODING METHOD, AND AUDIO DECODING METHOD |
摘要 |
An audio encoding apparatus capable of reducing the bit rate even if a codebook having a larger codebook number is selected in a split multi-rate lattice vector quantization is provided. Sub-vector determining unit (121) determines, in the spectrum of an input signal having been divided into a predetermined number of sub-vectors, a sub-vector using the largest number of bits. Positional information encoding unit (122) encodes the positional information of the determined sub-vector. Codebook indication value estimating unit (124) estimates a number of used bits for a codebook indication value of the largest number of used bits by use of the (N - 1) other codebook indication values, and generates a number-of-used-bits estimation value. Difference calculating unit (125) calculates a difference by subtracting the number-of-used-bits estimation value from the actual value of the codebook indication value of the largest number of used bits. Difference encoding unit (126) encodes the difference information. |
申请公布号 |
EP2772912(B1) |
申请公布日期 |
2016.08.10 |
申请号 |
EP20120843262 |
申请日期 |
2012.10.12 |
申请人 |
PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA |
发明人 |
LIU, ZONGXIAN;OSHIKIRI, MASAHIRO |
分类号 |
G10L19/02;H03M7/30 |
主分类号 |
G10L19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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