Bandwidth compression prediction method based on quad-tree

A bandwidth compression and prediction method technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of poor prediction effect and prediction efficiency, reduce theoretical limit entropy, etc., achieve good prediction effect and reduce theoretical limit entropy , Improve the effect of subjective picture quality

Inactive Publication Date: 2019-03-19
XIAN CREATION KEJI CO LTD
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AI Technical Summary

Problems solved by technology

[0003] Existing prediction methods mainly use texture feature analysis for prediction. For complex texture images, the prediction effect and efficiency are poor, and the theoretical limit entropy cannot be reduced well.

Method used

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  • Bandwidth compression prediction method based on quad-tree
  • Bandwidth compression prediction method based on quad-tree
  • Bandwidth compression prediction method based on quad-tree

Examples

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Embodiment 1

[0049] See figure 1 , figure 1 A flow chart of a quadtree-based bandwidth compression prediction method provided by an embodiment of the present invention, the prediction method includes the following steps:

[0050] Step 1. Segment the macroblock to be predicted according to the quadtree algorithm, wherein the sub-macroblocks after the macroblock to be predicted are divided into the first sub-macroblock, the second sub-macroblock, the third sub-macroblock and the fourth sub-macroblock;

[0051] Step 2. Obtain the first number of bits and the first prediction residual according to the macroblock to be predicted;

[0052] Step 3. Obtain a second number of bits and a second prediction residual according to the first sub-macroblock, the second sub-macroblock, the third sub-macroblock, and the fourth sub-macroblock;

[0053] Step 4. According to the first number of bits, the first prediction residual, the second number of bits and the second prediction residual, it is judged wh...

Embodiment 2

[0086] See figure 2 and image 3 , figure 2 A schematic diagram of a quadtree partitioning method for a macroblock to be predicted provided by an embodiment of the invention; image 3 It is a schematic diagram of another quadtree partitioning method for a macroblock to be predicted provided by the embodiment of the invention. On the basis of the foregoing embodiments, this embodiment introduces a quadtree-based bandwidth compression prediction method in detail.

[0087] Video may typically consist of a series of pictures, each picture divided or partitioned into predetermined regions, such as frames or macroblocks. When a region of video is divided into macroblocks, the divided macroblocks may be classified into intra macroblocks or inter macroblocks according to an encoding method. An intra macroblock refers to a macroblock encoded by an intra prediction encoding method. The intra prediction encoding method predicts the pixels of the current block by using the pixels of...

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Abstract

The invention discloses a bandwidth compression prediction method based on a quad-tree. The prediction method comprises the following steps of: step 1, dividing a macroblock to be predicted accordingto a quad-tree algorithm; step 2, acquiring a first bit number and a first prediction residual according to the macroblock to be predicted; step 3, acquiring a second bit number and a second prediction residual according to a first sub-macroblock, a second sub-macroblock, a third sub-macroblock, and a fourth sub-macroblock; step 4, determining whether to divide the macroblock to be predicted according to the first bit number, the first prediction residual, the second bit number, and the second prediction residual; and step 5, outputting the prediction residual and the minimum value of the pixel component of each divided sub-macroblock of the macroblock to be predicted. The bandwidth compression prediction method based on the quad-tree has good prediction effect and high processing efficiency, and can reduce the theoretical limit entropy when the method is used for complex texture image processing.

Description

technical field [0001] The invention belongs to the field of image compression, in particular to a quadtree-based bandwidth compression prediction method. Background technique [0002] With the gradual increase of people's demand for video quality, video image resolution, as one of the important characteristics of video quality, has transitioned from 720p and 1080p to the current mainstream 4K video resolution in the market, and the corresponding video compression standard has also changed from H. 264 to H.265. For video processing chips, the multiple increase in resolution will not only cause a substantial increase in chip area cost, but also have a great impact on bus bandwidth and power consumption. The basic principle of video coding and compression is to use the correlation between space domain, time domain and code words to remove redundancy as much as possible. The current popular approach is to use a block-based hybrid video coding framework to achieve video coding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/176H04N19/50H04N19/503H04N19/593H04N19/96
CPCH04N19/176H04N19/50H04N19/503H04N19/593H04N19/96H04N19/119H04N19/192
Inventor 张莹罗瑜冉文方
Owner XIAN CREATION KEJI CO LTD
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