Sequential searching speech coding device

Details Sequential searching speech coding device Sequential searching speech coding device

1996-12-04

2000-07-25

Voeltz, Emanuel Todd

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, G10L 302

Patent

active

06094630&

ABSTRACT:
A speech coding device in which an excitation signal of speech signals is expressed as a sum of a plurality of pulse strings, and positions of the pulse strings are selected from predetermined pulse position candidates to determine the excitation signal so that distortion between an input speech signal and a reproduced speech signal obtained by exciting a synthetic filter using the excitation signal may be minimized, resulting in obtaining reproduced speech signals with high quality in a small operational amount. In a pulse searcher, a pulse generating section outputs a plurality of pulse strings, and a pulse searching section sequentially searches the pulse strings to determine the positions of the plurality of pulse strings constituting the excitation signal. One pulse searching section searches using a Viterbi algorithm. Another pulse searching section preliminarily searches in a tree shape of pulse position candidates. Another pulse searching section searches every pulse position candidate group.

REFERENCES:
patent: 4038495 (1977-07-01), White
patent: 4220819 (1980-09-01), Atal et al.
patent: 4472832 (1984-09-01), Atal et al.
patent: 4516259 (1985-05-01), Yato et al.
patent: 4776015 (1988-10-01), Takeda et al.
patent: 4829575 (1989-05-01), Lloyd
patent: 4899385 (1990-02-01), Ketchum et al.
patent: 4932061 (1990-06-01), Kroon et al.
patent: 5144671 (1992-09-01), Mazor et al.
patent: 5327519 (1994-07-01), Haggvist et al.
patent: 5432883 (1995-07-01), Yoshihara
patent: 5432884 (1995-07-01), Kapanen et al.
patent: 5444816 (1995-08-01), Adoul et al.
patent: 5451951 (1995-09-01), Elliott et al.
Holmes. Speech Synthesis and Recognition. Chapman & Hall. p. 68, 1988.
Parsons. Voice and Speech Processing. mcGraw-Hill. pp. 243-244, 1987.
U. Kipper et al., "High Quality Speech Coding AL 4.8 KB/S Using Multi-Grid Celp Coders", Signal Processing Theories and Applications, vol. 2, No. Conf. 5, XP 000365774, Sep. 18, 1990, pp. 1215-1218.
Bishnu S. Atal et al., "A New Model of LPC Excitation for Producing Natural-Sounding Speech at Low Bit Rates", International Conference on Acoustics, Speech & Signal Processing ICASSP, vol. 1, No. Conf. 7, May 3-5, 1982 pp. 614-617.
S. Taumi et al., "Low-delay CELP with Multi-Pulse VQ and Fast Search for GMS EFR", IEEE International Conference on Acoustics, Speech and Signal Processing Conference Proceedings, vol. 1, XP 002070710, 1996, pp. 562-565 .

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