ADPCM System for speech or like signals

Details ADPCM System for speech or like signals ADPCM System for speech or like signals

1980-06-09

1982-10-12

Swann, III, Glen R.

Pulse or digital communications

Repeaters

Testing

329107, 332 11D, 375 60, H04B 1500

Patent

active

043542735

ABSTRACT:
In an adaptive differential pulse code modulation (ADPCM) system for frequency band compression of speech or like signals, the coefficient of the synthesis filter in both the transmitter and receiver is varied in accordance with the normalized error e.sub.j /.DELTA. rather than the error itself, thus providing greater frequency band compression and preventing transmission errors from rendering the synthesis filter unstable.

REFERENCES:
patent: 3502986 (1970-03-01), Lucky
patent: 3931596 (1976-01-01), Gersho et al.
patent: 3973199 (1976-08-01), Widmer
Cohn, D. L. et al., "The Residual Encoder-An Improved ADPCM System for Speech Digitization" IEEE Trans. on Comm., vol. COM-23, No. 9, pp. 935-941, Sep. 1970.
Jayant, "Adaptive Quantization . . . One-Word Memory" Bell Sys. Tech. Journal, vol. 52, No. 7, pp. 1119-1144. Sep. 1973.
Mick, Digital Signal Processing Handbook, p. 47, Adv. Micro Devices, Inc. Sunnyvale, CA. 1976.

Affiliated with

Also associated with

Rating

ADPCM System for speech or like signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with ADPCM System for speech or like signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ADPCM System for speech or like signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-226520