Self-adoptive video coding method based on small wave

A technology of video coding and wavelet coding, which is applied in the fields of digital video signal modification, image communication, electrical components, etc., and can solve the problems of slow coding speed and poor overall effect.

Active Publication Date: 2006-10-25
TENCENT TECH (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide an adaptive grid node motion search method for the defects of the above-mentioned slow coding speed and poor overall effect in the prior art

Method used

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  • Self-adoptive video coding method based on small wave
  • Self-adoptive video coding method based on small wave
  • Self-adoptive video coding method based on small wave

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Embodiment Construction

[0072] Such as figure 2 Shown is a schematic structural diagram of the grid in the wavelet-based adaptive video coding method of the present invention. In this embodiment, the grid division adopts a triangular grid structure (the vertices of the triangles are grid nodes, ie, pixel points). The advantage of adopting a triangular mesh structure is that it is relatively simple to construct. Of course, the wavelet-based adaptive video coding method of the present invention is also applicable to grid structures of other shapes.

[0073] Such as Figure 4 Shown is a flow chart of the wavelet-based adaptive video coding method of the present invention. In this embodiment, the intra-frame statistical properties of the video sequence frame are used to adaptively determine the size of the matching block during grid node motion estimation according to the intra-frame statistical property parameters.

[0074] Step S41, determining a matching block size parameter, that is, determining...

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Abstract

The method includes steps: (1) based on statistic characteristics inside frame of inputted video sequence frames to determine size parameter of matching block in searching movement of grid node; (2) based on the said size parameter of matching block, using matching block algorithm to obtain motion vector of current grid node; (3) using the motion vector to carry out wavelet encoding for video sequence frames. Taking full advantage of statistic characteristics inside frame of inputted video sequence frames, the invention can adjust matching block size of grid node in motion search automatically based on specific content so as to raise accuracy of motion estimation. Using statistic characteristics between frames, the invention can adjust size of searching window in motion search automatically based on specific content of video sequence so as to raise accuracy of motion estimation further.

Description

technical field [0001] The present invention relates to video compression coding technology in multimedia communication system, more specifically, relates to a wavelet-based self-adaptive video coding method in wavelet video coding. Background technique [0002] Existing international video coding standards (including H.264 / MPEG-4 AVC and H.261, H.263, MPEG-1, MPEG-2, MPEG-4, etc.) are applications for constant bit rate or constant video quality And formulate. With the development of the Internet (Internet), streaming media has gradually become a mainstream method for video applications. [0003] Due to the inherent heterogeneity of the Internet, various networks, such as ATM networks, high-speed LANs, mobile networks, and access networks, have different channel characteristics (channel bandwidth, delay, jitter, etc.). The user terminal may access the service through a high-speed Ethernet (Ethernet), may also obtain video through a medium-speed modem, and may also perform ...

Claims

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Application Information

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IPC IPC(8): H04N19/54H04N19/61H04N19/63
Inventor 熊联欢丁贵广严峻戴琼海
Owner TENCENT TECH (SHENZHEN) CO LTD
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