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Method for compressing and uncompressing video image and circuit for LCD overdriving

A technology of video image and compression method, which is applied in the field of image processing, can solve problems such as compression performance degradation, and achieve the effect of ensuring compression performance

Active Publication Date: 2010-06-30
ANALOGIX CHINA SEMICON
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for compressing and decompressing video images and a circuit for LCD overdrive, which can solve the problems in related technologies such as the degradation of compression performance when the blocks are large

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  • Method for compressing and uncompressing video image and circuit for LCD overdriving
  • Method for compressing and uncompressing video image and circuit for LCD overdriving
  • Method for compressing and uncompressing video image and circuit for LCD overdriving

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Embodiment Construction

[0021] figure 1 A flow chart of a video image compression method according to an embodiment of the present invention is shown. like figure 1 As shown, the video image compression method according to the embodiment of the present invention specifically includes the following steps:

[0022] S102. Perform 2×4 block segmentation on the video image to obtain 8 pixels of the current block;

[0023] S104. Select an encoding rule according to the above classification result and gradient information of the current block;

[0024] S106. Compress the current block by using the encoding rule.

[0025] Here, the 8 pixel points in the current block can be classified to obtain the classification result; at the same time, the gradient information of the current block can be obtained. Then, selecting a coding rule according to the classification result of the current block and the gradient information specifically includes:

[0026] 1) If the classification result is: the 8 pixels of the...

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Abstract

The invention provides a method for compressing and uncompressing a video image and a circuit for LCD overdriving. The video image compressing method comprises the following steps: partitioning the video image into 2*4 blocks to obtain 8 pixel points of a current block; choosing an encoding regulation according to classifying result and gradient information of the current block; and compressing the current block according to the encoding regulation. The invention can choose the relevant encoding regulation with four times of compression ratio by using the classifying result and the gradient information of the video image blocks, so that the method can obtain four times of compression ratio and ensure the compression property at the meantime.

Description

technical field [0001] The invention relates to the field of image processing, in particular to methods for compressing and decompressing video images and a circuit for LCD overdrive. Background technique [0002] Due to the sampling and holding principle of LCD (Liquid Crystal Display, liquid crystal display) and the slow response characteristics of liquid crystal molecules themselves compared with CRT (Cathode Ray Tube, cathode ray tube), motion blur will appear when LCD displays moving video images. In order to reduce motion blur, LCD response time compensation (Response Time Compensation, RTC) is commonly used as a motion blur removal method. Among them, the Over Drive technology is a relatively simple and very effective technology, and its principle is to perform over-drive look-up table according to the image data of two adjacent frames. Therefore, OverDrive needs off-chip RAM to store at least one frame of image compression data. In order to reduce the capacity of of...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/30G09G3/36H04N19/122H04N19/174
Inventor 张文超
Owner ANALOGIX CHINA SEMICON
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