Speech coding system utilizing vector quantization capable of mi

Details Speech coding system utilizing vector quantization capable of mi Speech coding system utilizing vector quantization capable of mi

1995-09-29

1998-06-30

MacDonald, Allen R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704230, 704207, G10L 300

Patent

active

057748381

ABSTRACT:
In a vector quantization apparatus for expressing a target vector by using a code vector designated by an index, an error evaluating section performs error evaluation for a code vector without considering a code error of the index and error evaluation with considering the code error, a first selecting section selects a small number of indexes from a larger number of indexes on the basis of an evaluation result without considering the code error, and a second selecting section selects, on the basis of an evaluation result with considering the code error, an index used to express the target vector from a small number of indexes selected by the first selecting section.

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Weidong Kou et al., Vector-Adaptive Vector Quantization with Application to Speech Coding; IEEE Transactions on Communications, vol. 39, No. 6, Jun. 1991, pp. 958-962.
Akitoshi Kataoka et al., Implementation and Performance of an 8-KBIT/S Conjugate Structure CELP Speech Coder; IEEE Proc. ICASSP 1994, pp. II-93-96.

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