Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion – Delay line
Patent
1995-09-28
1998-04-21
Hafiz, Tariq R.
Data processing: speech signal processing, linguistics, language
Audio signal bandwidth compression or expansion
Delay line
704500, 704503, 704214, G10L 302
Patent
active
057429308
ABSTRACT:
Voice compression is performed in multiple stages to increase the overall compression between the incoming analog voice signal and the resulting digitized voice signal over that which would be obtained if only a single stage of compression were to be used. A first type of compression is performed on a voice signal to produce an intermediate signal that is compressed with respect to the voice signal, and a second, different type of compression is performed on the intermediate signal to produce an output signal that is compressed still further. As a result, compression better than 1920 bits per second (and approaching 960 bits per second) are obtained without sacrificing the intelligibility of the subsequently reconstructed analog voice signal. Voice compression is also performed by recognizing redundant portions of said voice signal, such as silence, and replacing such redundant portions with a special code in said compressed signal. Among other advantages, the higher total compression allows speech to be transmitted in far less time than would otherwise be possible, thereby reducing expense.
REFERENCES:
patent: 4611342 (1986-09-01), Miller et al.
patent: 4631746 (1986-12-01), Bergeron et al.
patent: 4686644 (1987-08-01), Renner et al.
patent: 5170490 (1992-12-01), Cannon et al.
patent: 5280532 (1994-01-01), Shenoi et al.
patent: 5285498 (1994-02-01), Johnston
patent: 5353374 (1994-10-01), Wilson et al.
patent: 5353408 (1994-10-01), Kato et al.
patent: 5410671 (1995-04-01), Elgamal et al.
Sriram et al, "Voice packetization and compression in broadband ATM networks"; IEEE Journal on selected areas in communications, p. 294-304 vol. 9 iss. 3, Apr. 1991.
Intrator et al, "A single chip controller for digital answering machines"; IEEE Transactions on cosumer electronis, pp. 45-48, vol. 39 iss. 1, Feb. 1993.
Bindley, "Voice compression and compatibility and deployment issuies"; IEEE International conference on communications ICC '90, p. 952-954 vol. 3, 16-19 Apr. 1990.
Hafiz Tariq R.
Voice Compression Technologies, Inc.
LandOfFree
System and method for performing voice compression does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for performing voice compression, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for performing voice compression will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2069465