Title:
音声コーダの方法とシステム
Document Type and Number:
Japanese Patent JP4912816
Kind Code:
B2
Abstract:
Coding systems that provide a perceptually improved approximation of the short-term characteristics of speech signals compared to typical coding techniques such as linear predictive analysis while maintaining enhanced coding efficiency. The invention advantageously employs a non-linear transformation and/or a spectral warping process to enhance particular short-term spectral characteristic information for respective voiced intervals of a speech signal. The non-linear transformed and/or warped spectral characteristic information is then coded, such as by linear predictive analysis to produce a corresponding coded speech signal. The use of the non-linear transformation and/or spectral warping operation of the particular spectral information advantageously causes more coding resources to be used for those spectral components that contribute greater to the perceptible quality of the corresponding synthesized speech. It is possible to employ this coding technique in a variety of speech coding techniques including, for example, vocoder and analysis-by-synthesis coding systems.
Inventors:
Raji Laroia
Boone-Rock Jeo
Boone-Rock Jeo
Application Number:
JP2006271461A
Publication Date:
April 11, 2012
Filing Date:
October 03, 2006
Export Citation:
Assignee:
Alcatel-Lucent USA Inc.
International Classes:
G10L19/04; G10L19/14; G10L19/00; G10L19/02; H03M7/30; H04B14/04; G10L19/06
Domestic Patent References:
| JP5197400A | ||||
| JP6507252A | ||||
| JP4055899A |
Attorney, Agent or Firm:
Okabe
Masao Okabe
Nobuaki Kato
Asahi Shinmitsu
Masao Okabe
Nobuaki Kato
Asahi Shinmitsu