Motion vector processing

Details Motion vector processing Motion vector processing

1999-07-12

2001-06-19

Britton, Howard (Department: 2713)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240160

Reexamination Certificate

active

06249548

ABSTRACT:

The invention relates to a motion vector processing to reduce an amount of data required for transmitting or storing motion vectors.
EP 0,691,789 discloses a method and apparatus for motion field estimation, segmentation and coding. The motion estimation technique uses a hierarchical approach in which a motion vector updating routine is performed with respect to multiple levels of smaller and smaller regions of a frame. The motion vector updating routine updates the motion vector of a smaller region by assigning to it a best motion vector selected from among an initial motion vector assigned to the smaller region, motion vectors of neighboring regions, and a matched motion vector obtained by performing a block matching technique for the smaller region. The best motion vector for each region is selected according to a priority scheme and a predetermined threshold value. Adjacent regions having the same motion vector are then merged together, and a region shape representation routine is used to specify contour pixels that will allow the merged regions to be recovered by a decoder. A contour coding routine is then used to encode the contour pixels for transmission to the decoder.
It is, inter alia, an object of the invention to provide an efficient coding scheme which does not need a region merger and contour coding routine. To this end, a first aspect of the invention provides a motion vector processing method and device as defined in claims
1
and
2
. A second aspect of the invention provides an image signal decoder and an image signal display apparatus as defined in claims
3
and
4
.
In a motion vector processing method in accordance with a primary aspect of the invention, a motion vector is generated for a given picture part based on a selection of a motion vector out of a predetermined set of motion vectors to obtain a selected motion vector, and the given picture part is supplied together with a selection indication of the selected motion vector. In an image signal decoder, motion data are obtained from the selection indication, and an output picture part is generated based on the given picture part and the motion data.
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.


REFERENCES:
patent: 5377266 (1994-12-01), Katta
patent: 5642166 (1997-06-01), Shin et al.
patent: 5717465 (1998-02-01), Kim
patent: 5731840 (1998-03-01), Kiduchi
patent: 0294961A2 (1988-12-01), None
patent: 0590663A2 (1994-04-01), None
patent: 0691789A2 (1996-01-01), None

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