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Method of adaptive motion compensation time-domain filter

A technology of temporal filtering and motion compensation, applied in the field of video coding, can solve the problem of temporal de-redundancy capability limitation, affecting the overall performance of the video coding system, etc. Effect

Inactive Publication Date: 2009-07-08
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the existing motion-compensated time-domain filters are all based on wavelet filters with fixed beat lengths, which limits the time-domain de-redundancy capability of motion-compensated time-domain filters and affects the overall performance of video coding systems based on wavelet kernels.

Method used

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  • Method of adaptive motion compensation time-domain filter
  • Method of adaptive motion compensation time-domain filter
  • Method of adaptive motion compensation time-domain filter

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Embodiment Construction

[0024] According to the technical solution of the present invention, the inventor provides an embodiment of the present invention. The time domain filter used in this embodiment is obtained after optimal selection among the harr, 5 / 3, 7 / 5 and 9 / 7 filters.

[0025] exist figure 1 In , the division of block types in the current frame is given after performing forward and backward motion estimation and merging motion vector trees, in figure 2 In, the specific merging strategy and hierarchical structure of the motion vector tree are given, in figure 1 and figure 2 On the basis of the invention, the specific implementation of the embodiment of the invention is described as follows.

[0026] suppose , and the specific optimization criteria are given as follows.

[0027] Optimization criteria: set the size of block I as (M, N), H represents the high-pass filtering result of the block, and define the following measurement formula:

[0028] MAV = ...

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Abstract

This invention discloses an adaptive motion compensation time-domain filter method, which applies motion vector tree merger to realize effective coding of front and back motion vector trees to provide effective block plotting of the current frames for the time-domain filter, and provide an effective plotting structure for grade coding of the motion vectors, applies a block mapping selection technology to determine the time-domain relationship of the blocks and applies an adaptive selection filter technology to increase the de-redundancy ability of motion compensation time-domain filter.

Description

technical field [0001] The invention belongs to the field of video coding. It specifically relates to a high-performance adaptive motion compensation time-domain filtering method in a scalable video codec architecture. Background technique [0002] Compared with the traditional block DCT technology and the digital video codec system (H.26x and MPEG series) of the motion compensation DPCM closed-loop architecture, the video coding system structure based on the wavelet kernel has adaptive spatial, temporal and quality scalability , and can meet the heterogeneous video transmission network (Heterogeneous), the fluctuation of network bandwidth and the diversity of user video receiving terminals, so as to meet the development of modern information society and the needs of users. For the existing wavelet kernel-based video coding architecture, motion compensated temporal filtering (Motion Compensated Temporal Filtering) is a very important component. However, the existing motion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/30H04N19/117H04N19/126H04N19/139H04N19/176H04N19/60H04N19/615
Inventor 薛建儒郭树岗郑南宁兰旭光
Owner XI AN JIAOTONG UNIV
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