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Skip mode and Direct mode motion vector predicting method in three-dimension video

A motion vector and 3D video technology, applied in the field of video processing, can solve the problems of poor coding performance, poor motion vector prediction performance, poor reference frame quality, etc., and achieve good coding performance

Active Publication Date: 2013-05-15
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the quality of the reference frame of the virtual view is poor, or the correlation between views decreases so that the motion vector prediction performance of the basic view is not good, the coding performance will inevitably decline.

Method used

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  • Skip mode and Direct mode motion vector predicting method in three-dimension video
  • Skip mode and Direct mode motion vector predicting method in three-dimension video
  • Skip mode and Direct mode motion vector predicting method in three-dimension video

Examples

Experimental program
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Embodiment 1

[0021] figure 1 A flow chart of a method for predicting motion vectors in Skip and Direct modes in a three-dimensional video provided in Embodiment 1 of the present invention mainly includes the following steps:

[0022] Step 101 , judging whether the adjacent block of the current encoding block is encoded by using Skip or Direct of the virtual reference frame.

[0023] You can add flags in the adjacent block in advance, and judge whether the adjacent block uses Skip or Direct mode by decoding the flag (for example, if Skip or Direct mode is used, set its syntax element value to 1, otherwise set the syntax element to 0 ); when it is determined that the adjacent block uses the Skip or Direct mode, the reference frame type corresponding to the mode is further analyzed to determine whether the adjacent block uses virtual reference frame prediction.

[0024] Step 102, establishing a set of motion vectors in descending order of priority.

[0025] If the adjacent block of the curr...

Embodiment 2

[0031] In order to facilitate understanding of the present invention, the following in conjunction with the attached Figure 2-3 Do the present invention for further introduction. Such as image 3 As shown, it mainly includes the following steps:

[0032] Step 301. Determine the type of the frame corresponding to the current coding block.

[0033]This embodiment mainly considers the predictive frame P frame and the bidirectional predictive frame B frame. Among them, when decoding the P frame, it is necessary to superimpose the difference defined in this frame with the previously cached picture to generate the final picture, that is, the P frame has no complete picture data, only the data that is different from the picture of the previous frame; in other words, the P frame only allows frame Intra prediction (no motion vectors) and forward reference frame prediction. The B frame records the difference between the current frame and the previous and subsequent frames, that is,...

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Abstract

The invention discloses a Skip mode and Direct mode motion vector predicting method in a three-dimension video. The Skip and Direct mode motion vector predicting method in the three-dimension video includes the following steps. Whether a contemporary block of a present coding block uses a Skip mode or a Direct mode of a virtual reference frame to code or not. If positive is judged, the Skip mode or the Direction mode of the present block is virtual reference frame motor vector MVvsp, basic view motion vector MVbs, contemporary motion vector MVmedian and view-and-view motion vector MViv to form a motion vector set according to a preference order. If negative, the Skip mode or the Direction mode of the present block is MVbs, MVmedian, MViv and MVvsp to form a motion vector set according to a preference order. A rate distortion function R-D of each motion vector in the motion vector set is calculated and the minimum result is chosen as the premium motion vector of the Skip mode or the Direct mode of the current coding block. With the Skip mode and Direct mode motion vector predicting method in the three-dimension video, coding performance is improved.

Description

technical field [0001] The invention relates to the technical field of video processing, in particular to a method for predicting motion vectors in Skip and Direct modes in three-dimensional videos. Background technique [0002] In the past two decades, major changes have taken place in video broadcasting technology. From analog TV in the 20th century to digital TV, high-definition digital TV, and now 3D TV, video technology continues to develop and progress with the improvement of people's living standards. In today's world, people are no longer satisfied with the visual experience brought by traditional monocular video. The 3D video with presence and interactivity brings unprecedented wonderful experience to users with its unique depth-of-field effect. With the introduction of three-dimensional movies such as "Avatar" by Hollywood, three-dimensional video technology has gradually become a hot topic in the multimedia information industry. Compared with traditional monocula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N7/36H04N13/00H04N19/52
Inventor 苏文艺李厚强
Owner UNIV OF SCI & TECH OF CHINA