Geometric vector quantization

Details Geometric vector quantization Geometric vector quantization

1990-04-03

1992-08-04

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, H04N 713

Patent

active

051363747

ABSTRACT:
A geometric vector quantizer coding technique is illustrated in the context of a full motion video coder based on a three-dimensional sub-band framework. The original image data is decomposed into different spatial-temporal frequency bands and based on the data in each, different quantization strategies are applied to the bands. The lowest spatial-temporal frequency band is coded using a traditional three-dimensional switched predictor and optimum scaler quantizer. The non-dominant sub-bands are coded using the vector quantization approach to efficiently encode the images while appropriately exploiting the sparse, highly structured nature of the data to design the codebooks. Variable resolution is achieved using these techniques and no training is needed to establish or maintain the codebook.

REFERENCES:
patent: 4769826 (1988-09-01), Kubo et al.
patent: 4780761 (1988-10-01), Daly et al.
patent: 4797739 (1989-01-01), Tanaka
patent: 5010401 (1991-04-01), Murakami et al.

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