Title:
MOTION COMPENSATION CODER, MOTION COMPENSATION CODING METHOD AND MOTION COMPENSATION RECORDING MEDIUM THEREFOR
Document Type and Number:
Japanese Patent JP3856262
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce the code amount by compensating a motion of an image with adequate accuracy of a motion vector MV through the selection of the accuracy of the motion vectors in units of plural MVS based on the degree of a changed in the MV obtained tentatively with prescribed accuracy and the degree of the high frequency component of the image used for criterion.
SOLUTION: This coder is configured for applying motion compensation inter-image prediction to a dynamic image and to encode the image. The coder is provided with a tentative motion estimate means 6 that obtains a tentative MV with prescribed accuracy for each motion compensation block from an input image, an MV activity detection means 12 that obtains the degree of a change in the tentative MV in units of integrated blocks that result from integrating plural blocks, a high frequency component detection means 7 that obtains a degree of spatially high frequency components of the input image in the unit of integrated blocks, an MV accuracy selection means 13 that selects the accuracy of the MV in units of integrated blocks, based on a degree of change in the tentative MV and on the degree of the high frequency components, a main motion estimate means 17 that obtains the MV used for the actual motion compensation with the accuracy of the selected MV, a means 8 that uses the MV to form an inter motion compensation image prediction signal, and a means 18 that encodes the MV.
Inventors:
Kenji Sugiyama
Application Number:
JP7486598A
Publication Date:
December 13, 2006
Filing Date:
March 09, 1998
Export Citation:
Assignee:
Victor Company of Japan, Ltd.
International Classes:
H04N19/50; H04N19/105; H04N19/136; H04N19/139; H04N19/14; H04N19/176; H04N19/196; H04N19/46; H04N19/463; H04N19/503; H04N19/51; H04N19/517; H04N19/523; H04N19/60; H04N19/61; H04N19/625; H04N19/70; H04N19/91; (IPC1-7): H04N7/32; H04N7/30
Domestic Patent References:
| JP8037664A | ||||
| JP5227525A |
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