Quantization device and method, inverse-quantization device and

Details Quantization device and method, inverse-quantization device and Quantization device and method, inverse-quantization device and

1997-03-31

1999-07-13

Couso, Yon J.

Image analysis

Image compression or coding

Quantization

358433, G06K 936

Patent

active

059237872

ABSTRACT:
A quantization device includes a multiplying unit for multiplying one of n.times.n values of quantization matrix information by a selected scale factor so as to provide quantization basis information.
The n.times.n values correspond to n.times.n pixels of a process block. These values are used as threshold values for quantization. A quantization operation unit for carrying out a quantization process on one of n.times.n orthogonal transformation coefficients uses the quantization basis information to provide a quantization coefficient, and a scale factor supplying unit for providing the noted one of the scale factors for the multiplying unit for using process location information which indicates a location in n.times.n matrix of the noted one of the n.times.n orthogonal transformation coefficients.

REFERENCES:
patent: 5107345 (1992-04-01), Lee
patent: 5241395 (1993-08-01), Chen
patent: 5274442 (1993-12-01), Murakami
patent: 5347310 (1994-09-01), Yamada
patent: 5422963 (1995-06-01), Chen
patent: 5452104 (1995-09-01), Lee
Habibi, "Survey of Adaptive Image Coding Techniques", IEEE Transactions on Communications, V25, No. 11, Nov. 1977, pp. 1275-1284.
Chen et al., "Adaptive Coding of Monochrome and Color Images", IEEE Transactions on Communications, V25, No. 11, Nov. 1977, pp. 1285-1293.
Chang et al., "Transform Coding of Arbitrarily-Shaped Image Segments", Proceedings 1st ACM International Conference on Multimedia, 1993.
Bi et al., "Discrete Cosine Transform on Irregular Shape for Image Coding", IEEE--TENCON '93, 1993.

Affiliated with

Also associated with

Rating

Quantization device and method, inverse-quantization device and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Quantization device and method, inverse-quantization device and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantization device and method, inverse-quantization device and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2284539