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1. US20080019449 - Encoding macroblock type and coded block pattern information

Office
United States of America
Application Number 11903222
Application Date 20.09.2007
Publication Number 20080019449
Publication Date 24.01.2008
Grant Number 08290288
Grant Date 16.10.2012
Publication Kind B2
IPC
G06K 9/36
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
36Image preprocessing, i.e. processing the image information without deciding about the identity of the image
Applicants Microsoft Corporation
Inventors Lin Chih-Lung
Lee Ming-Chieh
Agents Klarquist Sparkman, LLP
Title
(EN) Encoding macroblock type and coded block pattern information
Abstract
(EN)

The coded block parameters used to code blocks of image samples into structures called macroblocks are compressed more efficiently by exploiting the correlation between chrominance and luminance blocks in each macroblock. In particular, the coded block pattern for chrominance and luminance are combined into a single parameter for the macroblock and jointly coded with a single variable length code. To further enhance coding efficiency, the spatial coherence of coded block patterns can be exploited by using spatial prediction to compute predicted values for coded block pattern parameters.