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Method for processing TV nonstandard signal

A processing method and TV technology, applied to color TV parts, TV system parts, TVs, etc., can solve problems such as image brightness changes, and achieve the effect of solving the problem of image brightness changes

Inactive Publication Date: 2012-11-14
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Description
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Problems solved by technology

[0003] The purpose of the embodiment of the present invention is to provide a method for processing non-standard TV signals, so that when the amplitude of the sync head changes, the viewing effect of the image will not be affected, and it can effectively solve the problem of interference caused by the sync signal. The problem of image brightness changes caused by changes

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  • Method for processing TV nonstandard signal

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Embodiment Construction

[0009] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0010] refer to figure 1 As shown, the processing method of the non-standard TV signal of the present invention detects the amplitude of the synchronous head of the input signal, and sets the brightness and darkness of the image signal according to the amplitude of the synchronous head. It keeps detecting the changes in the amplitude of the signal sync head, and once an abnormality is detected, it will deal with it accordingly.

[0011] The amplitude of the synchronization head of the detected input signal is obtained by reading the value of the automatic gain control (AGC), and the value of the a...

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Abstract

The invention discloses a method for processing a TV nonstandard signal, which comprises the following steps of: detecting the amplitude of a synchronous head of an input signal, and obtaining the detected amplitude of the synchronous head of the input signal by reading the size of automatic gain control (AGC), wherein the size of the AGC can be read in a register directly; and correspondingly adjusting the amplitude of a white level peak or black level size according to the obtained size of the synchronous head to realize the control of brightness of an image signal. By detecting the amplitude of the synchronous head of the input signal and setting the brightness of the image signal according to the amplitude of the synchronous head, the invention ensures that the viewing effect of the image is not affected and effectively solves the problem of image brightness change because a synchronous signal is changed by interference.

Description

technical field [0001] The invention belongs to the technical field of digital television, in particular to a method for processing non-standard television signals. Background technique [0002] Despite the rapid development of digital TV technology, analog TV still dominates the field of transmission and display. At present, most TV signals are mainly analog TV signals. At the transmitting end of the TV signals, the collected image signals and audio signals are modulated, synthesized, amplified into RF signals, and then transmitted through the antenna. At the receiving end, the high-frequency signal received by the antenna is amplified and mixed by the tuner to become an intermediate frequency signal. After the intermediate frequency carrier is amplified and synchronously detected, the video image signal modulated on the carrier is extracted, and the image and sound information are reproduced on the TV. For signals transmitted by RF, noise is a common problem. Coupled wit...

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Application Information

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IPC IPC(8): H04N5/44H04N5/04H04N5/52
Inventor 徐志芳
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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