Variable bit rate coding system

Details Variable bit rate coding system Variable bit rate coding system

1990-12-10

1993-05-25

Knepper, David D.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381 47, 381 30, 381 37, G10L 302

Patent

active

052147410

ABSTRACT:
A packet communication system or ATM communication system in which a sequence of signals such as speech signals is divided into a plurality of band areas and the power of each band area is determined. Based on the power of each band area, coding signals are allocated for each band, frame by frame. At a receiving side, the signal to noise ratio SNR of the decoded signal is predicted by changing the total number of encoding bits for each band area based on the power of each band area signal. The bit rate is controlled so as to make the SNR constant. The bit rate is changed in accordance with a Fourier transform of the input signal.

REFERENCES:
patent: 3471648 (1969-10-01), Miller
patent: 4386237 (1983-05-01), Virupaksha et al.
patent: 4455649 (1984-06-01), Estaban et al.
patent: 4860355 (1989-08-01), Copperi
patent: 4903301 (1990-02-01), Kondo et al.
patent: 4914701 (1990-04-01), Zibman
patent: 4941152 (1990-07-01), Medan
patent: 4972484 (1990-11-01), Theile et al.
patent: 5020058 (1991-05-01), Holden et al.
Cheung et al., "High Quality 16 kb/s Voice Transmission: The Subband Coder Approach", IEEE ICASP80 on ASSP, Apr. 1980, pp. 319-322.
CCITT SG XVIII; "Annex to Question X/XV (Speech Packetization)"; Jun. 6-17 1988, Geneva.
"Digital Coding of Waveforms", Principles and Application to Speech and Video, pp. 486-504 by N. S. Jayant et al.

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