发明名称 |
Speech coding system having codebook storing differential vectors between each two adjoining code vectors |
摘要 |
PCT No. PCT/JP91/01235 Sec. 371 Date May 14, 1992 Sec. 102(e) Date May 14, 1992 PCT Filed Sep. 17, 1991 PCT Pub. No. WO92/05541 PCT Pub. Date Apr. 2, 1992.A speech coding system is provided where input speech is coded by finding via an evaluation computation a code vector giving a minimum error between reproduced signals obtained by linear prediction analysis filter processing, simulating speech path characteristics, on code vectors successively read out from a noise codebook storing a plurality of noise trains as code vectors and an input speech signal and by using a code specifying the code vector. In the speech coding system, the noise codebook includes a delta vector codebook which stores an initial vector and a plurality of delta vectors having difference vectors between adjoining code vectors. In addition, provision is made in the computing unit for the evaluation computation of a cyclic adding unit for cumulatively adding the delta vectors to virtually reproduce the code vectors.
|
申请公布号 |
US5323486(A) |
申请公布日期 |
1994.06.21 |
申请号 |
US19920856221 |
申请日期 |
1992.05.14 |
申请人 |
FUJITSU LIMITED |
发明人 |
TANIGUCHI, TOMOHIKO;JOHNSON, MARK;OHTA, YASUJI;KURIHARA, HIDEAKI;TANAKA, YOSHINORI;SAKAI, YOSHIHIRO |
分类号 |
G10L15/02;G10L19/00;G10L19/12;H03M7/30;H04B14/04;(IPC1-7):G10L9/00 |
主分类号 |
G10L15/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|