Image compressor for generating predicted difference code...

Details Image compressor for generating predicted difference code... Image compressor for generating predicted difference code...

2008-09-02

2008-09-02

Tran, Phuoc (Department: 2624)

Image analysis

Image compression or coding

Predictive coding

C382S233000, C382S246000, C382S251000

Reexamination Certificate

active

11003372

ABSTRACT:
An image compressor of the present invention includes a difference calculating unit and a difference requantizing unit. The difference calculating unit calculates a predicted difference between a pixel value of image data and a predicted value (a calculated value of the pixel value predicted from known data). When a magnitude of the predicted difference exceeds a predefined threshold value, the difference requantizing unit applies the coarse quantization steps to requantize the predicted difference to keep a bit range to predetermined size. In this manner, compressed data, in which a bit length of the predicted difference for one pixel is adjusted to a fixed bit length, is generated.

REFERENCES:
patent: 5341442 (1994-08-01), Barrett
patent: 5379757 (1995-01-01), Hiyama et al.
patent: 6694061 (2004-02-01), Acharya
patent: 2003-224868 (2003-08-01), None
Journal of “Interface”; No. 175, pp. 167-168; Dec. 1991.

Affiliated with

Also associated with

Rating

Image compressor for generating predicted difference code... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image compressor for generating predicted difference code..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image compressor for generating predicted difference code... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3920155