Image encoding of moving pictures

Details Image encoding of moving pictures Image encoding of moving pictures

2007-06-26

2007-06-26

Bella, Matthew C. (Department: 2624)

Image analysis

Image compression or coding

Interframe coding

C382S238000, C382S250000, C382S253000, C348S402100, C348S413100, C348S415100, C348S417100, C375S240120, C375S240160, C375S240170

Reexamination Certificate

active

10703547

ABSTRACT:
In an encoding method of moving pictures which generates a predictive picture for a current picture based on a reference picture and a motion vector, a macroblock is divided into subblocks. In each of the plurality of subblocks, an initial value of the motion vector is set and an evaluated value E on a difference between the current picture and the reference picture is calculated along a steepest descent direction to determine the minimum value. Then, the smallest evaluated value is selected among the minimum values obtained on the plurality of subblocks to determine the motion vector based on the pixel position of the smallest value.

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H. Nakayama et al., “An MPEG-4 Video LSI with and Error-Resilient Codec Core based on a Fast Motion Estimation Algorithm.”, Proc. ISSCC 2002/Session 22/Multimedia Signal Processing/22.2 2002 IEEE International Solid-State Circuits Conference 0-7803-7335-9, pp. 10.
M. Takabayashi, et al. “A Fast Motion Vector Detection based on Gradient Method.” The Institute of Electronics, Information and Communication Engineers, Technical Report of IEICE, IE2001-74, Sep. 2001. pp. 1-6.

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