Claims
- 1. A codebook populating method for a split vector quantizer vocoder, said method comprising the steps of:(a) determining a first number of eligible codewords in original second codebook given a selected codeword from a first codebook; (b) when said first number is greater than a predetermined number, computing a second number of centroid of pairs of said codewords in said second codebook; and (c) when said first number is less than said predetermined number, computing said second number of centriods by repeatedly calculating said centroids of all said pairs of codewords having a first form and then calculating said centroids of all said pairs of codewords having a second form until said second codebook is fully populated.
Parent Case Info
This is a divisional of application Ser. No. 08/578,441 filed Dec. 26, 1995, is now U.S. Pat. No. 6,134,520 which is a continuation of application Ser. No. 08/133,415, filed Oct. 8, 1993 now abandoned, the disclosure of which is incorporated herein by reference.
US Referenced Citations (12)
Non-Patent Literature Citations (2)
Entry |
W. B. Kleijn et al, “An Efficient Stochastically Excited Linear Predictive Coding Algorithm for High Quality Low Bit Rate Transmission of Speech”, Speech Communication 7 (1988), Elsevier Science Publishers B.V., pp. 305-316. |
K. K. Paliwal et al, Efficient Vector Quantization of LPC Parameters at 24 Bits/Frame, ICASSP 91, vol. 1, 1991 International Conference on Acoustics, Speech and Signal Processing, May 14-17, 1991, pp. 661-664. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
08/133415 |
Oct 1993 |
US |
Child |
08/578441 |
|
US |