Image analysis – Image compression or coding – Lossless compression
Reexamination Certificate
2008-05-27
2008-05-27
Chen, Wenpeng (Department: 2624)
Image analysis
Image compression or coding
Lossless compression
C382S233000, C382S238000, C382S239000
Reexamination Certificate
active
07379608
ABSTRACT:
A method for encoding a video frame or picture comprises dividing up the video frame or the picture in portions of a first type associated with a first scanning pattern, and portions of a second type associated with a second scanning pattern. Data corresponding to a predetermined of the portions of the video frame or picture is transformed into a two-dimensional transform coefficient array. Fhe transform coefficients are precoded in order to obtain transform data units. One of a first and a second set of context models is chosen depending on as to whether the predetermined portion is a portion of a type being associated with the first or the second scanning pattern. One context model of the chosen one of the first and the second set of context models is assigned to the transform data unit based on the scanning position assigned to the predetermined transform coefficient. Finally, the transform data unit or a sub-unit thereof is arithmetically encoded into a coded bit stream based on the probability estimation with which the assigned context model is associated.
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Marpe Detlev
Schwarz Heiko
Wiegand Thomas
Chen Wenpeng
Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung
Ge Yuzhen
Glenn Michael A.
Glenn Patent Group
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