G - Physics – 06 – T
Patent
G - Physics
06
T
G06T 9/00 (2006.01) H04N 7/26 (2006.01) H04N 7/30 (2006.01) H04N 9/804 (2006.01) H04N 11/04 (2006.01)
Patent
CA 2131420
A picture data compressing device includes blocking, shuffling, DCT, quantization, variable length coding circuits, as well as a red block detector and a controller. The picture data are divided in blocks containing a pre-set number of pixels. The red block detector performs block-by-block processing by comparing the red- hued data and the blue-hued data with preselected red and blue threshold values for identifying blocks of data with red-hued pixels. The controller adjusts the quantization step size according to pre-established classes such that a finer quantization step is used when a red block is detected. By reducing the number of the red blocks, the block distortion is decreased and the picture quality is improved. Identification of the red picture data based on examining both red-hued and blue-hued data increases the detection accuracy. If the red and blue threshold values are selected as a multiple of some power of 2, the number of bits necessary for accurately identifying a red block is reduced, while the block-by-block processing requires less counter stages, thus simplifying the hardware and lowering the cost.
Fischl Jason
Izumi Nobuaki
Kiyama Yuka
Sugisaki Kiminori
Yanagihara Naofumi
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
Red data detector for picture data compression device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Red data detector for picture data compression device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Red data detector for picture data compression device will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1678418