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Method and device for dividing video blocks

A video block and video technology, applied in the direction of selective content distribution, image communication, electrical components, etc., can solve the problems of high complexity and achieve the effect of improving the quality of video reception

Active Publication Date: 2018-01-16
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the complexity of this method is very high, and it needs repeated iterations for each frame of video data to obtain the best division scheme.

Method used

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  • Method and device for dividing video blocks

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] Such as figure 1 As shown, the embodiment of the present invention provides a video block division method, including:

[0023] 11, the video resolution is the continuous F frame in the original video of H*V as a GOP (Group of Pictures, group of pictures), carries out 3D DCT (3Dimension Discrete CosineTransform, three-dimensional discrete cosine transform) separately to each GOP described, Obtain F frame two-dimensional DCT coefficient matri...

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Abstract

The invention discloses a video block dividing method and device. The method comprises the steps that continuous F frames in an original video with the video resolution being H*V are used as one GOP, 3D-DCT is independently performed on each GOP, so that F frames of 2D-DCT coefficient matrixes are obtained; the F frames of 2D-DCT coefficient matrixes are upwards divided into video blocks in half successively on diagonal lines in each frame, and the numbers of the video blocks are gradually decreased frame by frame. According to the video block dividing method and device, the amplitude distribution rule of DCT coefficients is utilized, the video blocks are divided based on comprehensive consideration for different amplitude distribution characteristics of front and rear frames, and therefore the video receiving quality is improved.

Description

technical field [0001] The invention relates to the field of wireless high-definition video transmission, in particular to a method and device for dividing video blocks. Background technique [0002] In recent years, wireless video multicast transmission has attracted widespread attention. The traditional point-to-point transmission scheme requires the sender to understand the channel conditions of the receiver and select the corresponding coding and modulation scheme to achieve the best reception effect. However, in a multicast scenario, this solution is prone to "landslide" phenomenon, that is, when the signal-to-noise ratio is lower than a certain threshold, the receiving quality drops sharply. [0003] In 2009, American scholars S. Jakubczak and D. Katabi proposed a transmission scheme called SoftCast. Different from traditional solutions, SoftCast adopts lossless compression and lossy transmission. At the sending end, first, 3DDCT (discrete cosine transform) is perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/2383H04N21/6405
CPCH04N21/2383H04N21/6405
Inventor 王莉莎刘丹谱张志龙尹长川郝建军罗涛李剑峰
Owner BEIJING UNIV OF POSTS & TELECOMM