Vector quantization of a time sequential signal by quantizing an

Details Vector quantization of a time sequential signal by quantizing an Vector quantization of a time sequential signal by quantizing an

1994-09-12

1996-12-10

Chin, Wellington

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

370521, 348418, 375377, H04B 166

Patent

active

055838880

ABSTRACT:
For quantization of subframe feature vectors representative of subframes identified by subframe indexes in each frame of a time sequential signal, such as an audio or a video signal, a first feature vector of a first subframe of a current frame is extracted with additional extraction of a second feature vector of a second subframe of the current frame and is quantized by a frame vector quantizer unit into a quantized frame vector for the current frame. Using a quantized frame vector for a previous frame and referring to interpolation coefficient vectors, an interpolator interpolates an interpolated feature vector for the current frame. An error vector is calculated between the interpolated and the second feature vectors and is quantized by an error vector quantizer unit into a quantized error vector. The subframe feature vectors are quantized by using the subframe indexes, the quantized frame vectors, the interpolated feature vector, and the quantized error vector. Preferably, the interpolation coefficient vectors are adjusted according to a mode decided for the current frame by its subframes.

REFERENCES:
patent: 3810245 (1974-05-01), Ozawa et al.
patent: 4821324 (1989-04-01), Ozawa et al.
patent: 4833713 (1989-05-01), Muroi et al.
patent: 4945565 (1990-07-01), Ozawa et al.
patent: 4975958 (1990-12-01), Hanada et al.
patent: 5018200 (1991-05-01), Ozawa
patent: 5023910 (1991-06-01), Thomson
patent: 5027405 (1991-06-01), Ozawa
patent: 5029211 (1991-07-01), Ozawa
patent: 5091946 (1992-02-01), Ozawa
patent: 5142548 (1992-08-01), Ozawa
patent: 5195137 (1993-03-01), Swaminathan
patent: 5195168 (1993-03-01), Yong
patent: 5208862 (1993-05-01), Ozawa
patent: 5271089 (1993-12-01), Ozawa
patent: 5347612 (1994-09-01), Fujimoto et al.
patent: 5394473 (1995-02-01), Davidson
patent: 5426718 (1995-06-01), Funaki et al.
patent: 5479559 (1995-12-01), Fette et al.
patent: 5487128 (1996-01-01), Ozawa et al.
Sugamura et al., "Speech Data Compression by LSP Speech Analysis-Synthesis Technique", vol. J64-A, The Transactions of the Electronics, Information, and Telecommunication Engineers of Japan, vol. J64-A, No. 8 Aug. 1981, pp. 599-606.
Wong et al., "Very Low Data Rate Speech Compression with LPC Vector and Matrix Quantization", IEEE Proceedings ICASSP, vol. ASSP-33, No. 3, Jun. 1985, pp. 537-545.
Tsao et al., "Matrix Quantizer Design for LPC Speech Using the Generalized Lloyd Algorithm", IEEE Transactions on Acoustics, Speech, and Processing, vol. ASSP-33, No. 3, Jun. 1985, pp. 537-545.
Lookabaugh et al., "High-Resolution Quantization Theory and the Vector Quantizer Advantage", IEEE Transactions on Information Theory, vol. 35, No. 5, Sep. 1989, pp. 1020-1033.

Affiliated with

Also associated with

Rating

Vector quantization of a time sequential signal by quantizing an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vector quantization of a time sequential signal by quantizing an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vector quantization of a time sequential signal by quantizing an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-430284