Title:
スピーチコーダパラメータの量子化方法
Document Type and Number:
Japanese Patent JP4558205
Kind Code:
B2
Abstract:
A method for encoding speech at a low bit rate. The method assembles parameters on N consecutive frames to form a super-frame. A vector quantization of transition frequencies of a voicing during each super-frame is made. Only the most frequent configurations are transmitted without deterioration and the least frequent configurations are replaced by the configuration that is the nearest in terms of absolute error among most frequent configurations. The pitch is encoded in carrying out a scalar quantization of only one value of the pitch for each super-frame. The energy is encoded in selecting only a reduced number of values in assembling these values in sub-packets quantized by vector quantization. The spectral envelope parameters are encoded by vector quantization in selecting only a determined number of filters. The untransmitted energy values are recovered in the synthesis part by interpolation or extrapolation from transmitted values. Such a method may find particular application in vocoders.
Inventors:
Grenay, Philip
Chartier, Frederick
Chartier, Frederick
Application Number:
JP2000575121A
Publication Date:
October 06, 2010
Filing Date:
October 01, 1999
Export Citation:
Assignee:
Thales
International Classes:
G10L19/00; G10L19/02; G10L19/04; G10L19/06; G10L19/087; G10L19/16; G10L25/93; H03M7/30; H03M7/36
Domestic Patent References:
| JP5197400A | ||||
| JP2001511917A | ||||
| JP10293600A | ||||
| JP2000514207A |
Attorney, Agent or Firm:
Sonoda Yoshitaka
Kobayashi Yoshinori
Kobayashi Yoshinori