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Video signal conversion circuit and television

A video signal and conversion circuit technology, applied in the field of televisions, can solve the problems of color cast and affect the picture quality effect, achieve the effect of good picture quality and eliminate the color cast problem.

Active Publication Date: 2014-03-26
上海顺久电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For pictures in some special scenes (such as RGB signals with 64 or more grayscale changes), when the color is switched, the DC level of the video signal changes drastically, causing the DC blocking capacitor to charge and discharge, resulting in color cast in low-brightness parts, affecting quality effect

Method used

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  • Video signal conversion circuit and television
  • Video signal conversion circuit and television
  • Video signal conversion circuit and television

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Embodiment Construction

[0024] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0027] figure 1 is a schematic diagram of a video signal conversion cir...

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Abstract

The invention provides a video signal conversion circuit and a television. The video signal conversion circuit comprises a blocking capacitor, a selection switch circuit, a buffer and an analog-digital conversion circuit, the blocking capacitor is connected to an input end of the selection switch circuit and used for filtering direct-current components in analog video signals, the selection switch circuit is used for selectively inputting the analog video signals, an input end of the buffer is connected with an output end of the selection switch circuit while an output end of the same is connected to an input end of the analog-digital conversion circuit, the buffer is used for receiving the input analog video signals, buffering the analog video signals and outputting the analog video signals to the analog-digital conversion circuit, and the analog-digital conversion circuit converts the received analog video signals into digital video signals. By the video signal conversion circuit, color shift of a low-brightness portion can be eliminated, and picture display effect can be improved.

Description

technical field [0001] The present invention relates to the technical field of video signal processing, in particular to a video signal conversion circuit and a television with the video signal conversion circuit. Background technique [0002] Video analog front-end circuit (video ADC) is an important component of digital home and personal entertainment system, and an indispensable part of video SOC chip. The market for consumer devices using analog video interfaces as the primary connection type is still thriving due to the high image quality and especially low power consumption of these analog interfaces compared to some popular digital video interfaces. In addition, computer monitors and home entertainment devices will continue to support the already ubiquitous set-top boxes, VCRs, DVD players, digital cameras and other devices that only provide video in analog format. This analog front-end can capture and digitize video from xVGA computer video sources and many analog d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/14H04N5/21
Inventor 杨元成
Owner 上海顺久电子科技有限公司
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