Speech encoding apparatus utilizing stored code data

Details Speech encoding apparatus utilizing stored code data Speech encoding apparatus utilizing stored code data

1993-01-22

1997-09-23

Hafiz, Tariq R.

395 232, 395 229, 395 237, G10L 302, G10L 900

Patent

active

056713274

ABSTRACT:
A learning-type speech encoding apparatus comprises an adaptive code book storing driving signal vectors, a minimum distortion searching circuit for searching the adaptive code book for an optimum driving signal vector on the basis of the input speech signal, a synthesizing filter for synthesizing a speech signal using the optimum driving signal vector retrieved, a buffer for storing the optimum driving signal vector retrieved, a training vector creating section for producing a training vector by segmenting the stored driving signal vector in units of a specified length, and a learning section for learning by constantly updating the driving signal vectors in the code book on the basis of the training vector.

REFERENCES:
patent: 5208862 (1993-05-01), Ozawa
patent: 5230036 (1993-07-01), Akamine et al.
patent: 5323486 (1994-06-01), Taniguchi et al.
patent: 5327521 (1994-07-01), Savic et al.

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