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Motion encoding and decoding

A coding and decoding technology, applied in the field of coding and decoding technology of moving images

Active Publication Date: 2013-07-10
FRANCE TELECOM SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] This can create problems especially in bandwidth-constrained situations such as wireless environments

Method used

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  • Motion encoding and decoding
  • Motion encoding and decoding
  • Motion encoding and decoding

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Embodiment Construction

[0024] The present invention is applicable to various image encoding and decoding systems, ie, for example the system shown in FIG. 1 . The system enables the encoding and transmission of a video sequence of a digital television data stream F in a transmitter 1 comprising a video encoder 2 comprising a controller or computer 3 and a memory 4 . The transmission may be received by a base station 5 which also includes a controller or computer 7 and a memory 8 .

[0025] For example, said transmitter 1 comprises an antenna for transmitting a data stream Φ in a format such as the so-called "DVB", via a microwave channel of digital television, and said base station 5 is a personal computer.

[0026] The relevant encoding method related to the present invention will be clarified with reference to FIG. 2 .

[0027] The encoder 2 receives a stream F of image data of a video stream. Process data streams to encode individual images or image parts. The technical term "picture part" usu...

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Abstract

A method is provided for encoding a portion of a current image, including: an estimation of motion between the current image portion and a plurality of candidate image portions in order to form motion components, an evaluation of a performance criterion for each candidate image portion, and the selection of a reference image portion using said performance criteria. In the method, for at least one motion component, the motion estimation, the performance criteria evaluation and the reference image portion selection only use information considered to be available at the decoder and no motion information is inserted into an output flow intended for a decoder. A corresponding decoding method is also provided.

Description

technical field [0001] The present invention relates to image coding and decoding technology, especially moving image coding and decoding technology. Background technique [0002] Several methods exist, according to the so-called "INTER" coding mode, capable of coding parts of a current picture relative to previously decoded pictures. Portions of the current image may be represented by luma and chrominance information as well as information relating to motion between portions of the current image and portions of the reference image. This takes advantage of the temporal correlation between images. [0003] Motion information consists of one or several components, eg translational motion vectors, rotations, pixel components and sub-pixel components. Encoding typically involves determining information for reconstructing the motion components. For example, the motion vector is predicted, and the information used for reconstruction includes the identifier of the prediction fun...

Claims

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Application Information

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IPC IPC(8): H04N7/26
CPCH04N19/00587H04N19/00533H04N19/51H04N19/44H04N19/00
Inventor 乔尔·琼格古伊劳姆·拉罗切
Owner FRANCE TELECOM SA
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