Title:
CELP TYPE SOUND DECODER AND CELP TYPE SOUND ENCODING METHOD
Document Type and Number:
Japanese Patent JP3174782
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a satisfactory synthesized sound reduced in a calculation amount and requiring a low ROM capacity.
SOLUTION: In a sound decoder, generated information of a sound vector constituted with a low pulse number is stored into a sound source information storing part 1, any one of sequence of numbers is stored into a diffusion vector storing part 2 out of a random sequence of numbers, a sequence of numbers found by learning and a sequence of numbers found by knowlege, and sound source information of the sound source information storing part 1 and a diffusion vector of the vector storing part 2 are convoluted by a convolution part 3 to prepare a diffusion sound source vector. In a sound encoder, the diffusion vector and an impusle response from a digital filter are convoluted by the convolution part 3 to prepare a new impulse response.
Inventors:
Kazutoshi Yasunaga
Toshiyuki Morii
Toshiyuki Morii
Application Number:
JP2000113780A
Publication Date:
June 11, 2001
Filing Date:
August 22, 1996
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G10L19/038; G10L19/12; H03M7/30; H04B14/04; (IPC1-7): G10L19/12; H03M7/30; H04B14/04
Domestic Patent References:
| JP2280200A | ||||
| JP2282800A | ||||
| JP6130994A | ||||
| JP6195098A |
Attorney, Agent or Firm:
Koichi Washida (3 outside)
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