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A disparity vector derivation method and device

A technology of disparity vector and difference vector, which is applied in the field of disparity vector derivation method and its corresponding device, and can solve problems such as coding performance degradation

Active Publication Date: 2018-12-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a limit on the disparity vector range, then a reasonable mechanism is needed to determine the limit range, otherwise it will cause a decrease in coding performance

Method used

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  • A disparity vector derivation method and device
  • A disparity vector derivation method and device
  • A disparity vector derivation method and device

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Experimental program
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Embodiment 1

[0115] An embodiment of the present invention provides a preferred method for deriving a disparity vector.

[0116] The disparity vector derivation method provided in this embodiment includes at least the following steps:

[0117] Step 1, obtain the next adjacent block candidate disparity vector, if it can be obtained, go to step 2, otherwise end the export process;

[0118] Step 2, judging whether the disparity vector of the adjacent block candidate satisfies the disparity vector threshold limit, if so, go to step 3, otherwise go to step 1;

[0119] Step 3, using the adjacent block candidate disparity vector as the final derived disparity vector, and ending the derivation process;

[0120] Here are some specific instructions:

[0121] In step 1, to obtain the disparity vector of the next adjacent block candidate, that is, to check all the unchecked adjacent blocks of the current image block in order whether the adjacent block contains a disparity vector, if one can be found...

Embodiment 2

[0145] An embodiment of the present invention provides a preferred method for deriving a disparity vector.

[0146] The depth image coding method based on the depth lookup table provided in this embodiment includes at least the following steps:

[0147] Step 1, obtain the next adjacent block candidate disparity vector, if it can be obtained, go to step 2, otherwise end the export process;

[0148] Step 2, judging whether the disparity vector of the adjacent block candidate satisfies the disparity vector threshold limit, if so, go to step 3, otherwise go to step 1;

[0149] Step 3. Use the adjacent block candidate disparity vector as the final derived disparity vector, and end the derivation process.

[0150] In addition, after the derivation process ends, if no disparity vector is derived, a default disparity vector is output as the final derived disparity vector.

[0151] The specific operation method of the above steps 1-3 is basically the same as the method introduced in ...

Embodiment 3

[0178] An embodiment of the present invention provides a preferred device for deriving a disparity vector. figure 1 It is a schematic diagram of a preferred structure of the disparity vector deriving device. The device consists of three modules:

[0179] 1) Candidate disparity vector acquisition module: the input is adjacent block information, and the output is candidate disparity vector. Its functions and implementations are the same as the functions and implementations of obtaining a candidate disparity vector of an adjacent block in the above-mentioned disparity vector derivation method same.

[0180] 2) Threshold generation module: the input is the current coded viewpoint and reference viewpoint information and camera parameter information, and the output is the disparity vector threshold. And the function of generating the disparity vector threshold limit from the camera parameter information is the same as the embodiment.

[0181] 3) Threshold discrimination module: t...

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Abstract

The invention discloses a disparity vector exporting method. The method comprises the following steps: acquiring a next adjacent block candidate disparity vector; judging whether or not the adjacent block candidate disparity vector meets a disparity vector threshold limit; if so, taking the adjacent block candidate disparity vector as a final export disparity vector; and ending an exporting process. Through adoption of the disparity vector exporting method, the problems of low accuracy and large reference viewpoint image range in an existing disparity vector acquisition method are solved.

Description

technical field [0001] The present invention relates to the field of multimedia communication, in particular to a method for deriving a disparity vector and a corresponding device. Background technique [0002] ●Video coding layered structure [0003] When using coding standards such as H.264 / AVC and the latest HEVC, a frame of image can be divided into multiple slices, and each slice is encoded and decoded separately. Encoding a slice generates a slice code stream, and the slice code stream also includes some encoding parameters of the slice, such as the serial number of the parameter set referenced by the slice. In the hierarchical structure in H.264 / AVC, two-level parameter sets, image parameter set and sequence parameter set, are used to describe some parameters of the video sequence. A sequence parameter set can be referenced by an image parameter set, and an image parameter set can be referenced by a slice. Through this mechanism, a slice can find the image parameter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/176H04N19/52H04N13/00
Inventor 虞露吕鹏
Owner ZHEJIANG UNIV