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SECAM (Sequential Colour and Memory) system detection method and device

A detection method and standard technology, applied in television, electrical components, image communication, etc., can solve problems such as failure, complexity, and affecting the accuracy of color burst signal judgment, and achieve the effect of enhancing signal strength and ensuring accuracy

Active Publication Date: 2012-09-05
ARKMICRO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the SECAM system judgment method based on the above principles is relatively complicated to implement, and when the signal is very weak, due to the existence of interference, it will affect the accuracy of the color burst signal judgment, or even fail

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  • SECAM (Sequential Colour and Memory) system detection method and device
  • SECAM (Sequential Colour and Memory) system detection method and device
  • SECAM (Sequential Colour and Memory) system detection method and device

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Embodiment Construction

[0048] The specific implementation manners of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] First, briefly introduce the professional background knowledge related to the present invention.

[0050] Color burst signal area: CVBS signal is composed of image signal, composite blanking signal and composite sync signal. The color burst signal is located on the back shoulder of the line blanking pulse after the line synchronization signal, which is a section with the same frequency as the color subcarrier at the sending end and maintains a definite phase relationship with it (9±1 color subc...

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Abstract

The embodiment of the invention discloses an SECAM (Sequential Colour and Memory) system detection method which comprises the following steps of: inputting video signals line by line; setting a window in a color synchronization signal area of each line of video signals, and grouping every six adjacent lines of video signals as one; in the window area, adding data of every two lines of odd-numbered lines or even-numbered lines in each group to obtain three sum values, judging whether the amplitude of the three sum values satisfies two small values and one big value, voting for the satisfaction condition of the three sum values, judging whether one value is larger than the other two in three voting values M1, M2 and M3 and the difference of the other two is larger than a set threshold value, if yes, the current system is an SECAM system. The invention further discloses a corresponding SECAM system detection device. The method and device disclosed by the invention are simpler and can be realized conveniently.

Description

technical field [0001] The invention relates to the field of video signal processing, in particular to a method and device for detecting the standard of the video signal. Background technique [0002] Traditional video signals are divided into three types: NTSC, PAL, and SECAM. Each type is divided into several sub-categories. In the full-standard decoding chip, these types of systems need to be automatically identified. When the system is judged wrong, image color errors will occur. , line and field instability, etc. Therefore, the accuracy of system detection is a prerequisite for correct decoding to obtain clear images. [0003] as attached figure 1 as shown in figure 1 Shown are the various characteristics of all the current systems. Among them, the SECAM system has two color subcarrier frequencies, while the PAL system and NTSC system have a single fixed color subcarrier frequency. Therefore, the general SECAM system is easier to integrate with the PAL system. The NT...

Claims

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Application Information

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IPC IPC(8): H04N17/02
Inventor 李琛石岭高夫
Owner ARKMICRO TECH
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