- Patent Title: Methods and devices for encoding and decoding an image sequence implementing a prediction by forward motion compensation, corresponding stream and computer program
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Application No.: US13638525Application Date: 2011-03-29
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Publication No.: US09756357B2Publication Date: 2017-09-05
- Inventor: Isabelle Amonou , Stéphane Pateux , Nathalie Cammas
- Applicant: Isabelle Amonou , Stéphane Pateux , Nathalie Cammas
- Applicant Address: FR Paris
- Assignee: FRANCE TELECOM
- Current Assignee: FRANCE TELECOM
- Current Assignee Address: FR Paris
- Agency: Westman, Champlin & Koehler, P.A.
- Agent David D. Brush
- Priority: FR1052440 20100331
- International Application: PCT/FR2011/050687 WO 20110329
- International Announcement: WO2011/121227 WO 20111006
- Main IPC: H04N7/32
- IPC: H04N7/32 ; H04N19/583 ; H04N19/52 ; H04N19/70 ; H04N19/61 ; H04N19/553 ; H04N19/57

Abstract:
A method and apparatus for encoding a sequence of images by predicting at least one current image by forward motion compensation from at least one reference image. Prediction implements, for at least one current block of the current image: forward projection of a block of the reference image on the current image, delivering a projected block at least partially overlapping the current block; partitioning the current block delivering a sub-block at least partially overlapped by at least one projected block; and at least one iteration of the following steps for at least one overlapped sub-block: checking that the overlapped sub-block complies with a predetermined allotting criterion; with a positive check, allotting, to the overlapped sub-block, one of the projected motion vectors; and with a negative check, and so long as a predetermined minimum size is not reached for the overlapped sub-block: partitioning of the overlapped sub-block.
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