Method for determining motion vector and macroblock type

Details Method for determining motion vector and macroblock type Method for determining motion vector and macroblock type

2003-12-30

2008-12-09

Senfi, Behrooz (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240240, C375S240130

Reexamination Certificate

active

07463686

ABSTRACT:
A motion vector and macroblock type determining method is provided. The method comprises receiving a high frame-rate video stream having N frames; skipping a frame N-1; allocating a motion vector to a macroblock of frame N according to a macroblock type of the skipped frame N-1; allocating a macroblock type to a macroblock type of frame N according to a macroblock type of the skipped frame N-1; and outputting a low frame-rate video stream.

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Kwang-Deok Seo et al., Dynamic Bit-Rate Reduction Based on Frame-Skipping and Requantization for MPEG-1 to MPEG-4 Transcoder, Proceedings of the 2003 IEEE International Symposium on Circuits and Systems, ISCAS 2003 (Cat. No. 03CH7430) Bangkok, Thailand May 25-28, 2003, vol. 2, pp. II-372-II-375.
Seo K. et al., “Dynamic Bit-Rate Reduction Based on Requantization and Frame-Skipping for MPEG-1 to MPEG-4 Transcoder,” IEICE Transactions on Fundmentals of Electronics, Communications and Computer Sciences, Institute of Electronics Information and Comm. Eng. Tokyo, JP, vol. E87-A, No. 4, Apr. 2004, pp. 903-911.
Kwang-Deok Seo et al., “Fast Motion Vector Refinement for MPEG-1 to MPEG-4 Transcoding with Spatial Down-Sampling in DCT Domain.” Proceedings 2001 International Conference on Image Processing (Cat. No. 0 CH37205) IEEE Piscataway, NJ, USA, vol. 1, 2001, pp. 469-472.

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