Image data compression apparatus and related method thereof

Abstract

An exemplary image data compression apparatus includes a compression circuit, a characteristic value extracting circuit, and a selecting circuit. The compression circuit is utilized for applying a plurality of different compression approaches to a first block, and accordingly generating a plurality of first candidate compression results of the first block. The characteristic value extracting circuit is coupled to the compression circuit, and utilized for deriving a plurality of first characteristic values from the first candidate compression results, respectively. The selecting circuit is coupled to the compression circuit and the characteristic value extracting circuit, and utilized for selecting a target compression result of the first block from the first candidate compression results according to the first characteristic values and at least one characteristic value threshold.

Description

technical field [0001] The present invention relates to processing image data, and more particularly relates to an image data compression device and method. Background technique [0002] Data compression is commonly used to reduce the amount of data stored in a storage device. Taking the overdrive technology applied to a Liquid Crystal Display (LCD) panel as an example, the response time is artificially increased by increasing the driving voltage for changing the state of the liquid crystal cell. The overdrive voltage of one liquid crystal cell (ie, one pixel) is determined by the pixel value in the current frame and the pixel value in the previous frame. Therefore, the image data of the previous frame must be recorded into the frame buffer (buffer) for subsequent use. Please note that the buffer is taken as an example in the present invention, and those skilled in the art can understand that the buffer can be a desired storage device. Generally speaking, the image data o...

AI Technical Summary

Problems solved by technology

If a compression method with a lower compression ratio is provided to compress the image data of the previous frame, then the frame buffer must have a large capacity, otherwise, the frame buffer cannot fit all the compressed image data of the previous frame

However, if a higher compression ratio is used, the difference between the original image data and the recovered (recovered) image data from the compressed image data can be significant, resulting in a reduction in display quality.

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