Television – Bandwidth reduction system – Data rate reduction
Patent
1993-09-07
1994-08-09
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
348615, H04N 7133
Patent
active
053370880
ABSTRACT:
In signal processing method, bandwidth compression codes an image signal by blocks of plural proximal pixels, and outputs the decoded signal after decoding by the same block units. When a level difference occurs during decoding at the border between adjacent blocks, the level of the pixels near the block border is corrected so that the level difference is reduced before outputting the decoded signal. In addition, if the level difference between two pixels within the same block and at the border thereof is less than a predetermined level during decoding, and the difference between the level of two border pixels in adjacent blocks is greater than the level difference of the two pixels within the same block, the decoded signal is output after pixel level correction is applied near the block border to reduce the level difference of the two pixels in the adjacent blocks. Thus, the level difference between blocks is smoothed, and visual image deterioration resulting from block distortion can be greatly improved.
REFERENCES:
patent: 4442454 (1984-04-01), Powell
patent: 5005077 (1991-04-01), Samad
patent: 5247363 (1993-09-01), Sun
Britton Howard W.
Matsushita Electric - Industrial Co., Ltd.
LandOfFree
Method of correcting an image signal decoded in block units does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of correcting an image signal decoded in block units, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of correcting an image signal decoded in block units will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-219283