Motion vector coding method and motion vector decoding method

Details Motion vector coding method and motion vector decoding method Motion vector coding method and motion vector decoding method

2003-04-10

2008-07-01

Diep, Nhon (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

07394853

ABSTRACT:
A motion vector coding method and apparatus that improves efficiency of coding motion vectors when a current block is coded using a plurality of motion vectors. The apparatus includes a motion vector coding unit that codes a motion vector inputted from a motion vector detecting unit. A motion vector for each current block is coded based on a difference between the motion vector and a predicted vector obtained from motion vectors for previously coded neighboring blocks. The predicted vector is generated by one of the following processes: (A) the motion vectors which refer to the same picture are selected from among the motion vectors for the neighboring blocks so as to generate the predicted vector; (B) the motion vectors for the respective neighboring blocks are ordered in the predetermined order, and the motion vectors of the same order rank are selected from the ordered motion vectors so as to generate the predicted vector; and (C) the predicted vector for the second motion vector of the current block shall be the first motion vector, and if the second motion vector and the first motion vector refer to different pictures, the first motion vector is scaled according to the temporal distance between the pictures so as to generate the predicted vector.

REFERENCES:
patent: 5412430 (1995-05-01), Nagata
patent: 5905535 (1999-05-01), Kerdranvat
patent: 5926225 (1999-07-01), Fukuhara et al.
patent: 5978048 (1999-11-01), Lee
patent: 6825885 (2004-11-01), Bottreau et al.
patent: 6862320 (2005-03-01), Isu et al.
patent: 0 526 163 (1993-02-01), None
patent: 0 944 245 (1999-09-01), None
patent: 5-37915 (1993-02-01), None
H.26L Test Model Long Term No. 6(TML-6) draft.0. [Online], ITU-Telecommunications Standardization Sector Study Group 16 Video Coding Experts Group (VCEG), 2001. [retrieved on May 28, 2003], pp. 28-33, especially p. 32.
Takahiro Fukuhara et al., “Very Low Bit-Rate Video Coding with Block Partitioning and Adaptive Selection of Two Time-Differential Frame Memories”, IEEE Transactions on Circuits and Systems for Video Technology, IEEE Service Center, Piscataway, NJ, US, vol. 7, No. 1, Feb. 1997, XP01001439.
“Working Draft No. 2, Revision 2(WD-2)”, Document JVT-D118R2, Jan. 29, 2002, pp. 1-10, XP001086630.
Faouzi Kossentini et al., “Predictive RD Optimized Motion Estimation for Very Low Bit-Rate Video Coding”, IEEE Journal on Selected Areas in Communications, IEEE Service Center, Piscataway, US, vol. 15, No. 9, Dec. 1997, XP011054728.

Affiliated with

Also associated with

Rating

Motion vector coding method and motion vector decoding method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Motion vector coding method and motion vector decoding method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motion vector coding method and motion vector decoding method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3964789