System and method of compression/decompressing a speech signal b

Details System and method of compression/decompressing a speech signal b System and method of compression/decompressing a speech signal b

1997-03-20

1999-12-28

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704270, G10L 302

Patent

active

060093870

ABSTRACT:
Apparatus for processing acoustic features extracted from a sample of speech data forming a feature vector signal every frame period includes a first linear prediction analyzer, a vector quantizer, at least one partitioned vector quantizer and a scalar quantizer. The first linear prediction analyzer performs a linear prediction analysis on the feature vector signal to generate a first error vector signal. Next, the vector quantizer performs a vector quantization on the first error signal thereby generating a first index corresponding to a first prestored vector signal which is an approximation of the first error vector signal. The vector quantizer also generates a residual vector signal which is the difference between the first error vector signal and the first prestored approximation vector signal. Next, the at least one partitioned vector quantizer performs a partitioned vector quantization on a first portion of the residual vector signal thereby generating at least one second index corresponding to a second prestored vector signal which is an approximation of the first portion of the residual vector signal. Next, the scalar quantizer performs a scalar quantization on a second portion of the residual vector signal thereby generating a third index corresponding to a prestored scalar signal which is an approximation of the second portion of the residual vector signal. The first, second and third indices are combined to form an encoded vector signal which is a compressed representation of the feature vector signal. The encoded vector signal may be transmitted and/or stored as desired. The feature vector signal may be reconstructed from the encoded vector signal by adding the corresponding prestored signals to the encoded vector signal to form a decompressed representation of the feature vector signal.

REFERENCES:
patent: 5271089 (1993-12-01), Ozawa
patent: 5487128 (1996-01-01), Ozawa
patent: 5649051 (1997-07-01), Rothweiler et al.
patent: 5668925 (1997-09-01), Rothweiler et al.
patent: 5673364 (1997-09-01), Bialik
patent: 5729655 (1998-03-01), Kolesnik et al.
Law et al. Split-Dimension Vector Quantization of Parcor Coefficients for Low Bit Rate Speech Coding. IEEE Transactions on Speech and Audio Processing. vol. 2, No. 3, Jul. 1994.
Law et al. A Novel Split Resideual Vector Quantization Scheme for Low Bit Rate Speech Coding. Acoustics, Speech and Signal Processing. vol. 1, 1994.
Zeger et al. A Parallel Processing Algorithm for Vector Quantizer Design Based on Subpartitioning. Acoustics, Speech and Signal Processing. vol. 2, Jul. 1991.
Furui et al. Advances in Speech Signal Processing. 1992. pp. 49-51, 58-77.

Affiliated with

Also associated with

Rating

System and method of compression/decompressing a speech signal b 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 of compression/decompressing a speech signal b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method of compression/decompressing a speech signal b will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2389460