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Video scaler

A scaler and video technology, applied in the field of video scalers, can solve problems such as reducing the refresh speed of display devices, and achieve good display effects, conversion, and low complexity.

Inactive Publication Date: 2010-07-28
无锡致新电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing video scalers are generally integrated in the display control circuit, which can only scale the current image, and then scale other images after the current image is displayed, thus reducing the refresh rate of the display device

Method used

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Embodiment Construction

[0047] Hereinafter, the present invention will be described in detail through embodiments with reference to the drawings.

[0048] The invention is independent of the display control circuit and is between the video output circuit and the display control circuit. The present invention only achieves image scaling, and the output image data still needs to be processed by the display control circuit, so the present invention and the display control circuit must be integrated in the same chip.

[0049] Such as figure 1 As shown, the present invention is composed of APB control module 101, AHB MASTER control module 102, input DMA 103 and output DMA 107, input FIFO 104 and output FIFO 106, bilinear interpolation algorithm module 105, and register 110. among them:

[0050] The APB control module 101, the interface communicating with the APB bus 108, is used to control the reading and writing of all internal registers 110; the APB control module 101 enables the internal registers 110 to hav...

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Abstract

The invention provides a video scaler, which consists of an AHB MASTER control module, an APB control module, an input DMA and an output DMA, an input FIFO and an output FIFO, a register and a bilinear interpolation algorithm module. The AHB MASTER control module provides an interface signal for an AHB bus; the APB control module is used for controlling the read / write of the internal register; the input DMA writes an input image into the input FIFO; the output DMA writes the input image back to a memory from the output FIFO; and a control circuit of the bilinear interpolation algorithm module realizes the image reduction. The video scaler can directly output the cutdown image without performing manual cutting in advance; the bilinear interpolation algorithm is adopted, and the complexity is low; meanwhile, the video scaler has good display effect, effectively realizes the conversion of image resolution ratio, and improves the refresh rate of display.

Description

Technical field [0001] The invention relates to the field of video image processing, in particular to a video scaler. Background technique [0002] LCD displays gradually dominate in display terminal devices, but their optimal resolution is a fixed value, that is, their physical display pixels. Different display devices have different physical display pixels. After the video output circuit performs a series of processing on the image, the display control circuit generates input signals such as line / field synchronization and frame synchronization required by the display device, and finally outputs the image to the display device. In practical applications, the input image resolution of a digital TV or computer is also variable. There is often a mismatch between the optimal resolution of the display device and the image resolution, so that the correct image cannot be displayed, so a video scaler is required. The output images of different resolutions are further processed, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36H04N5/44
Inventor 张怡周毅
Owner 无锡致新电子科技有限公司
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