Video decoder

a decoder and video technology, applied in the field of video decoders, can solve problems such as image disturbance, and achieve the effect of suppressing nois

Inactive Publication Date: 2011-03-03
LAPIS SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect that this invention improves image quality when converting analog signals like images onto different colors without generating unwanted noises or distortions during transmission.

Problems solved by technology

The technical problem addressed in this patented technology relates to improving the accuracy or reliability of video decode circuits used with cameras attached to navigational systems like Personal Navigation Devices (PDs). This issue arises because current methods are expensive due to their large size and require complex circuitry designs.

Method used

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Embodiment Construction

[0014]A video decoder of the invention acquires luminance component data carrying a luminance component and color difference component data carrying a color difference component from A / D converted composite video data. The decoder then performs dithering on each piece of the luminance component data and the color difference component data for output as digital luminance and color difference signals.

[0015]FIG. 1 is a diagram illustrating the overall configuration of an example of a video decoder according to the present invention.

[0016]As shown in FIG. 1, such a video decoder includes an A / D conversion part that has a clamp circuit 1, an amplifier 2, and an A / D converter 3; a synchronous detection part 4; a Y / C separator 5; a luminance processing part 6; a color difference processing part 7; and an output format conversion part 8.

[0017]The clamp circuit 1 clamps an input analog composite video signal CVBS to adapt its level to the dynamic range of the downstream A / D converter

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Abstract

A video decoder is provided which can convert analog composite video signals into noise-suppressed luminance and color difference signals without increasing the system in size. From the A/D converted composite video data, luminance component data carrying the luminance component and color difference component data carrying the color difference component are acquired. Then, dithering is performed on each piece of the luminance component data and the color difference component data for output as digital luminance and color difference signals.

Description

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Claims

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Application Information

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Owner LAPIS SEMICON CO LTD
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