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Methods for decoder-side motion vector derivation

A motion vector, end motion technology, applied in the field of DMVD)

Inactive Publication Date: 2013-03-13
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the templates used in the TM full search mechanism are limited to inverted L-shaped templates with a fixed template size, almost all supported MB types require flags encoded in the bitstream, and the highest precision of MV is limited to 1 / 4 pixel accuracy, and the candidate-based search mechanism only uses the MV of the left block and the upper right block (or the upper left block)

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  • Methods for decoder-side motion vector derivation
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  • Methods for decoder-side motion vector derivation

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Embodiment Construction

[0034] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0035] The present invention provides an example of DMVD desi...

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Abstract

An exemplary method for decoder-side motion vector derivation (DMVD) includes: checking a block size of a current block to be encoded and accordingly generating a checking result; and utilizing a DMVD module to refer to the checking result to control conveyance of first DMVD control information which is utilized for indicating whether a DMVD coding operation is employed to encode the current block. When the checking result indicates a predetermined criterion is satisfied, the first DMVD control information is sent in a bitstream; otherwise, the first DMVD control information is not sent.

Description

[0001] This application is a divisional application of an application with a filing date of December 14, 2010, an application number of 201010586667.6, and an invention title of "Deriving Method for Decoder Motion Vector". technical field [0002] The present invention relates to a data encoding / decoding method, and in particular to a decoder-side motion vector derivation (Decoder-side Motion Vector Derivation, hereinafter referred to as DMVD) method. Background technique [0003] In video coding, the temporal and spatial correlations found in image sequences can be exploited to reduce bitrate / enhance coding efficiency. Generally speaking, motion compensated inter-frame prediction (motioncompensated inter-frame prediction) greatly affects the final compression efficiency. Motion information such as motion vector (Motion Vector, hereinafter referred to as MV) data and reference image index is obtained at the encoder and encoded in the bitstream, so the decoder can simply perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/50
CPCH04N19/0063H04N19/0066H04N7/26808H04N7/2684H04N7/26313H04N19/00545H04N19/56H04N19/46H04N19/523
Inventor 黄毓文蔡玉宝傅智铭雷少民
Owner MEDIATEK INC
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