Multi-directional Prediction Method of Block-Skipping and Scanning in Bandwidth Compression

A prediction method and bandwidth compression technology, applied in the multimedia field, can solve the problems of inability to obtain prediction reference and prediction results, inability to obtain, poor effect, etc., and achieve the effect of reducing theoretical limit entropy, high compression rate, and small prediction residual error.

Active Publication Date: 2021-08-06
上海九吾尊易信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when predicting, because more reference directions cannot be obtained, better prediction references and prediction results cannot be obtained
It can be seen that the above-mentioned raster scan is not optimal, and compared with flat areas, raster scan is less effective in predicting boundaries and complex texture areas

Method used

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  • Multi-directional Prediction Method of Block-Skipping and Scanning in Bandwidth Compression
  • Multi-directional Prediction Method of Block-Skipping and Scanning in Bandwidth Compression
  • Multi-directional Prediction Method of Block-Skipping and Scanning in Bandwidth Compression

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Embodiment 1

[0054] See figure 1 , figure 1 It is a flow chart of a multi-directional prediction method for block skipping and scanning in bandwidth compression provided by an embodiment of the present invention. The method comprises the steps of:

[0055] Step 1. Divide the image into multiple MBs of the same size;

[0056] Step 2, using P marking symbols to mark the multiple MBs, where P is a natural number greater than 1;

[0057] Step 3: Predict MBs corresponding to the P marker symbols sequentially in a set order to obtain prediction residuals.

[0058] Wherein, step 2 may include the following steps:

[0059] Step 21, using a plurality of marking symbols to complete the marking of MB in the horizontal direction in a cycle;

[0060] Step 22, using a plurality of marking symbols to complete the marking of the MB in the vertical direction cyclically in sequence.

[0061] Wherein, step 3 may include the following steps:

[0062] Step 31. Predict the MB corresponding to the Nth mar...

Embodiment 2

[0091] See Figure 2 to Figure 8 , figure 2 A schematic diagram of an image MB division mark provided by an embodiment of the present invention; image 3 A schematic diagram of another image MB division mark provided by the embodiment of the present invention; Figure 4 A schematic diagram of the original position of the current MB and the closest reference MB provided by the embodiment of the present invention; Figure 5 A schematic diagram of zoomed-in positions between the current MB and the closest reference MB provided by the embodiment of the present invention; Figure 6 A schematic diagram of the current MB full reference direction provided by the embodiment of the present invention; Figure 7 A schematic diagram of the current MB without a lower reference direction provided by the embodiment of the present invention; Figure 8 A schematic diagram of determining a second reference pixel for a current pixel provided by an embodiment of the present invention. In thi...

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Abstract

The present invention relates to a multi-direction prediction method for block skip scanning in bandwidth compression, comprising: dividing an image into multiple MBs of the same size; and marking the multiple MBs with P marking symbols, wherein P is greater than 1 A natural number; sequentially predict the MBs corresponding to the P marker symbols in a set order to obtain a prediction residual. The present invention determines the predicted pixel value of the current pixel through the method of skipping and scanning. Compared with the existing method, more reference directions can be obtained for MB, and the theoretical limit entropy of prediction can be further reduced.

Description

technical field [0001] The invention relates to the field of multimedia technology, in particular to a multi-direction prediction method for block skip scanning in bandwidth compression. Background technique [0002] With the continuous improvement of the public's demand for video quality, the image resolution of video is one of the important characteristics of video quality, and the image resolution of video has also increased exponentially. It has transitioned from 720p and 1080p to the current mainstream 4K in the market. Video resolution, the corresponding video compression standard also transitions from H.264 to H.265. Therefore, the data volume of the video image is very huge, and it needs to occupy more storage space and transmission bandwidth. In this case, it is particularly necessary to use the bandwidth compression technology in the chip to improve the storage space and transmission bandwidth of the image. [0003] Different from port type compression (such as H....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/129H04N19/182H04N19/176H04N19/50
CPCH04N19/129H04N19/176H04N19/182H04N19/50
Inventor 张莹罗瑜
Owner 上海九吾尊易信息科技有限公司
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