| 摘要 |
PCT No. PCT/NL91/00200 Sec. 371 Date Apr. 9, 1993 Sec. 102(e) Date Apr. 9, 1993 PCT Filed Sep. 25, 1991 PCT Pub. No. WO92/06470 PCT Pub. Date Apr. 16, 1992.In a code excited linear prediction (CELP) analog signal coding system sequences from a master codebook (40), which may be a one dimensional codebook, are filtered (42) and then stored in slave codebooks (70,72). Input analog siganls (20)are filtered (34,36) and compared orthogonally (66,78,80) with sequences from the slave codebooks and an optimum pair of sequences are selected. Reduced length sequences from the master codebook may be compared with orthogonalized analog signals since orthogonalized siganls contain some redundancy. |
