EP 0405548 A2 19910102 - System for speech coding and apparatus for the same.
Title (en)
System for speech coding and apparatus for the same.
Title (de)
Verfahren und Einrichtung zur Sprachcodierung.
Title (fr)
Procédé et dispositif pour le codage de la parole.
Publication
Application
Priority
- JP 16618089 A 19890628
- JP 16864589 A 19890630
- JP 19530289 A 19890727
Abstract (en)
A CELP type of speech signal coding system, wherein a code vector obtained by applying linear prediction to a vector of a residual speech signal of white noise stored in a code book and a pitch prediction vector obtained by applying linear prediction to a residual signal of a preceding frame given a delay corresponding to a pitch frequency are added, use is made of an impulse vector obtained by applying linear prediction to a residual signal vector of impulses having a predetermined relationship with the vectors of the white noise code book, variable gains are given to at least the above code vector and impulse vector, a reproduced signal is produced, and this reproduced signal is used for identification of the input speech signal, thus enabling the creation of a pulse series corresponding to the sound source of voiced speech sounds, enabling accurate evaluation and identification of a pulse-like sound source of voiced speech sounds and enabling improvement of the quality of the reproduced speech while reducing the amount of information transmitted.
IPC 1-7
IPC 8 full level
G10L 19/12 (2013.01); G10L 25/93 (2013.01)
CPC (source: EP)
G10L 19/12 (2013.01); G10L 25/93 (2013.01); G10L 2019/0003 (2013.01); G10L 2019/0005 (2013.01); G10L 2019/0011 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0405548 A2 19910102; EP 0405548 A3 19910828; EP 0405548 B1 19941117; CA 2019801 A1 19901228; CA 2019801 C 19940531; DE 69014156 D1 19941222; DE 69014156 T2 19950511
DOCDB simple family (application)
EP 90112351 A 19900628; CA 2019801 A 19900626; DE 69014156 T 19900628