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Sound encoder and sound decoder

A technology of speech encoder and decoder, applied in the field of speech signal encoder and speech signal decoder

Inactive Publication Date: 2008-06-18
GK BRIDGE 1
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Sound encoder and sound decoder
  • Sound encoder and sound decoder
  • Sound encoder and sound decoder

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Embodiment Construction

[0068] Embodiments of the present invention will be described below using the drawings.

[0069] (first embodiment)

[0070] Fig. 3 is a functional block diagram of the sound source vector generation device according to the embodiment of the present invention. This sound source vector generating device includes: a pulse vector generating unit 101 with multiple channels; a diffusion mode storage selection unit 102 with a diffusion mode storage unit and a switch; a pulse vector diffusion unit 103 of a diffusion pulse vector; a plurality of channel pulses to be diffused Diffusion vector adder 104 for vector addition.

[0071] The pulse vector generation section 101 has N channels (in the present embodiment, the case of N=3 will be described), and these channels generate a vector (hereinafter referred to as a pulse vector) in which a unit pulse with a polarity is arranged in a certain element on the vector axis.

[0072] The diffusion pattern storage selection unit 102 has memor...

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Abstract

The present invention relates to a sound encoder and a sound decoder, especially a diffusion vector generator and a diffusion vector generating method used for the sound encoder or the sound decoder. The diffusion vector generator of the invention comprises the following components: an impulse vector providing unit which provides the impulse vector with the polar unit impulse; a diffusion mode selecting unit which selects a diffusion mode from a plurality of diffusion modes stored in the storing unit; and a diffusion vector generating unit which executes convolution operation to the impulse vector and the selected diffusion mode to generate the diffusion vector.

Description

[0001] This application is a divisional application of the invention patent application with the application number 98801556.0, the international filing date being October 22, 1998, and the invention title being "Voice Signal Encoder and Voice Signal Decoder". technical field [0002] The present invention relates to a speech signal encoder and a speech signal decoder for efficiently encoding and decoding speech information. Background technique [0003] Today, speech coding techniques for efficiently coding and decoding speech information are being developed. "Code Excited Linear Prediction: High Quality Speech at Low Bit Rate" (Code Excited Linear Prediction: High Quality Speech at Low Bit Rate) (written by M.R.Schroeder; published in ICASSP'85, pp.937~940) records that based on this speech Coding technology CELP type speech signal coder. This voice signal encoder performs linear prediction on each frame obtained by dividing the input voice with a fixed time, and obtains ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/12G10L19/14G10L19/038G10L19/04G10L19/06G10L19/08H03M7/30
Inventor 安永和敏森井利幸
Owner GK BRIDGE 1