Title:
ENCODING DEVICE, ENCODING METHOD, PROGRAM AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2013/129528
Kind Code:
A1
Abstract:
A gain codebook having a plurality of sets stored therein is stored in a gain quantization unit. The sets contain candidates for quantized fixed codebook gains, candidates for quantized pitch gains, and indexes. A plurality of indexes includes indexes with different numbers of bits. Time or frequency intervals are constituted by a plurality of sub-intervals, and for each sub-interval, an index, which is selected by considering both waveform distortion itself caused by gain quantization and the distortion converted from the length of the corresponding code, serves as a gain code. An encoding method is adjusted in at least one sub-interval in which subsequent processing is performed on the basis of the length of the selected gain code.
Inventors:
MORIYA TAKEHIRO (JP)
KAMAMOTO YUTAKA (JP)
HARADA NOBORU (JP)
HIWASAKI YUSUKE (JP)
FUKUI MASAHIRO (JP)
KAMAMOTO YUTAKA (JP)
HARADA NOBORU (JP)
HIWASAKI YUSUKE (JP)
FUKUI MASAHIRO (JP)
Application Number:
PCT/JP2013/055243
Publication Date:
September 06, 2013
Filing Date:
February 27, 2013
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G10L19/16; H03M7/30
Foreign References:
| JP2011509426A | 2011-03-24 | |||
| JP2011133637A | 2011-07-07 | |||
| JP2004020676A | 2004-01-22 |
Other References:
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
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
Naoki Nakao (JP)
Naoki Nakao (JP)
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Claims: