Speech coder and speech decoder
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazutoshi Yasunaga, Toshiyuki Morii
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Abstract
A dispersed vector generator used in an excitation vector generator for a speech coder/decoder is provided. The dispersed vector generator includes a pulse vector generating section that generates a pulse vector having a signed unit pulse on one element of a vector axis. The dispersed vector generator also includes a dispersion pattern storing section that stores a plurality of dispersion patterns, a switch that selects a dispersion pattern out of the plurality of dispersion patterns stored in the dispersion pattern storing section and a pulse vector dispersion section that generates a dispersed vector by convoluting the selected dispersion pattern and the pulse vector.
Claims1
A dispersed vector generator used in an excitation vector generator for a speech coder/decoder comprising:
- a pulse vector generating section that generates a pulse vector having a signed unit pulse on one element of a vector axis;
- a dispersion pattern storing section that stores a plurality of dispersion patterns;
- a switch that selects a dispersion pattern out of said plurality of dispersion patterns stored in said dispersion pattern storing section;
- and
- a pulse vector dispersion section that generates a dispersed vector by convoluting said selected dispersion pattern and said pulse vector.
Dependencies are inferred from the claim text.