ENCODING DEVICE, ENCODING METHOD, PROGRAM AND RECORDING MEDIUM

WIPO Patent Application WO/2013/129439

A1

A gain codebook having a plurality of sets stored therein is stored in a gain quantization unit. The sets contain candidates for quantized pitch gains, candidates for quantized fixed codebook gains, and indexes. A plurality of indexes includes indexes with different numbers of bits. In selecting a code, the waveform distortion itself caused by gain quantization, and the distortion converted from the length of the corresponding code are both considered. In other words, in order to select a code, not only is the distortion of a waveform caused by the use of the code considered, but the code length assigned to the code is considered.

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MORIYA TAKEHIRO (JP)
KAMAMOTO YUTAKA (JP)
HARADA NOBORU (JP)
KAMEOKA HIROKAZU (JP)
SAGAYAMA SHIGEKI (JP)
OSHIMA TAKAYOSHI (JP)
ONO NOBUTAKA (JP)
SAITO DAISUKE (JP)

PCT/JP2013/055048

September 06, 2013

February 27, 2013

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NIPPON TELEGRAPH & TELEPHONE (JP)
UNIV TOKYO (JP)
KEK HIGH ENERGY ACCELERATOR (JP)

G10L19/12; G10L19/16; H03M7/30

JP2011509426A	2011-03-24
JP2011133637A	2011-07-07
JP2004020676A	2004-01-22

TAKAYOSHI OSHIMA ET AL.: "Variable-length coding of ACELP gain using Entropy-Constrained VQ", INTERNATIONAL SYMPOSIUM ON COMMUNICATIONS AND INFORMATION TECHNOLOGIES (ISCIT), 5 October 2012 (2012-10-05), pages 105 - 109

NAKAO, Naoki et al. (JP)
Naoki Nakao (JP)

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