Phase excited linear prediction encoder

Details Phase excited linear prediction encoder Phase excited linear prediction encoder

2005-03-22

2005-03-22

McFadden, Susan (Department: 2655)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S219000, C704S222000

Reexamination Certificate

active

06871176

ABSTRACT:
A low bit rate phase excited linear prediction type speech encoder filters a speech signal to limit its bandwidth and then fragments the filtered speech signal into speech segments. The speech segments are decomposed into a spectral envelope and an LP residual signal. The spectral envelope is represented by LP filter coefficients. The LP filter coefficients are converted into line spectral frequencies (LSF). Each speech segment is also classified as one of a voiced segment and an unvoiced segment based on a pitch of the segment. Parameters are extracted from the LP residual signal, where for an unvoiced segment the extracted parameters include pitch and gain and for a voiced segment the extracted parameters include pitch, gain and excitation level. The extracted parameters are then quantized.

REFERENCES:
patent: 5293448 (1994-03-01), Honda
patent: 5517595 (1996-05-01), Kleijn
patent: 5754974 (1998-05-01), Griffin et al.
patent: 5774837 (1998-06-01), Yeldener et al.
patent: 5809456 (1998-09-01), Cucchi et al.
patent: 5845244 (1998-12-01), Proust
patent: 6041297 (2000-03-01), Goldberg
patent: 6067511 (2000-05-01), Grabb et al.
patent: 6070137 (2000-05-01), Bloebaum et al.
patent: 6119082 (2000-09-01), Zinser, Jr. et al.
patent: 6233550 (2001-05-01), Gersho et al.
patent: 6636829 (2003-10-01), Benyassine et al.
patent: 6782360 (2004-08-01), Gao et al.
“Speech Compression,” Internet Webpage http://www.data-compression.com/speech.html, Mar. 12, 2001,10 pp.
“Two-mode Pitch-Synchronous Waveform Interpolation (TPSWI) Model,” by Choi, published in the Ph.D. Thesis, University of Liverpool, Jan. 1997, pp. 134-172. chap. 5.
“A 2.4 KBIT/S MELP Coder Candidate for the New U.S. Federal Standard,” by McCree et al., published in the IEEE Proc. ICASSP 1996, pp. 200-203.
“Encoding Speech Using Prototype Waveforms” by Kleijn, published in the IEEE Transactions on Speech and Audio Processing, vol. 1, No. 4, Oct. 1993, pp. 396-399.

Affiliated with

Also associated with

Rating

Phase excited linear prediction encoder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase excited linear prediction encoder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase excited linear prediction encoder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3405971