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Title:
音声復号化方法及び音声符号化方法及び音声復号化装置及び音声符号化装置
Document Type and Number:
Japanese Patent JP4916521
Kind Code:
B2
Abstract:
A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech decoding method according to a code-excited linear prediction (CELP) speech, a noise level of a speech in a concerning decoding period is evaluated by using a decoded gain of the speech based on a gain code included in the coded speech.

Inventors:
Tadashi Yamaura
Application Number:
JP2009018916A
Publication Date:
April 11, 2012
Filing Date:
January 30, 2009
Export Citation:
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Assignee:
Research In Motion Limited
International Classes:
G10L19/12; G10L19/038; G10L19/04; G10L19/10; G10L19/22; G10L25/90; G10L25/93; H03M7/30; H04B14/04
Domestic Patent References:
JP4270400A
JP5265496A
JP5265499A
JP869298A
JP8328598A
JP922299A
Attorney, Agent or Firm:
Nobuaki Kazehaya
Noriko Asano



 
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