Image memory card data processing system and displaying device thereof

Abstract

Data processing system of image storage card includes JPEG decoding unit, color space matrix circuit, the said JPEG decoding unit reads image storage card and carries out decoding, and outputs digital brightness signal and color difference signal. Receiving the said digital brightness signal and color difference signal, the matrix circuit outputs digital signals of base colors through demodulation. The display set of image storage card includes data processing system and display terminal. The said display terminal receives signals of base colors to carry out image display. Advantages are: raised sharpness of digital photos, breaking away from restriction of CCIR standard. The invention is suitable to TV in plug-in card and derived products.

Description

technical field [0001] The invention relates to digital image processing technology, in particular to image storage card data processing and display technology. Background technique [0002] Image memory card, or digital photo, such as CF, SM, SD, MMC, MS, XD memory card, its images are stored in the medium according to the JPEG (abbreviation of Joint Photographic Experts Group, an image data compression standard) file format . [0003] With the increasing popularity of digital cameras, high-resolution digital photos emerge in endlessly, and more and more people need to view images on digital photos on ordinary display terminals, such as LCD monitors, LCD TVs, PDPs, CRT TVs, and rear projection TVs. . A plug-in card TV is a device with an image memory card display function. Since the card reader is included, the image signal on the image memory card can be displayed without using a digital camera. [0004] Due to the limitations of data transmission standards and process...

AI Technical Summary

Problems solved by technology

However, the signal converted by D / A and A / D is limited by the compression and restoration algorithm and the frequency band of the data transmission channel. In the display terminal, the signal not only suffers a great loss in image quality, but also the high-frequency component is difficult to recover. Moreover, the introduction of unavoidable digital noise makes the image definition on the terminal display far from reaching the resolution of 640×480

For JPEG images, the resolution of digital photos taken by ordinary 2-megapixel digital cameras can reach up to 1600×1200 resolution. If the current display method is used, it is obviously far from achieving the real shooting effect, which makes people appreciate digital photos. , a lot of detail is lost

The image display effect is far from the actual shooting effect, and the actual quality of the image cannot be reproduced

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