Monitor for monitoring video signal power level

Abstract

The invention discloses a monitor for monitoring a video signal electrical level, A function module circuit board is arranged between a television mainboard and a screen mainboard, the television mainboard outputs a LVDS video signal to a LVDS receiving chip and then a RGB video signal group is output after decoding; a line number and column number identify circuit obtains the line number and the column number of a current pixel according to the RGB video signal group, the line number and the column number of the current pixel are sent into a frame memory control circuit and a video signal synthesis circuit, under the control of CLK, the frame memory control circuit controls the writing and reading operation of a double-port frame memory 5 according to the line number and the column number of the current pixel, a signal peak detection circuit detects the average peak value of a signal in a frame according to a received signal to be detected and the average peak value enters the video signal synthesis circuit through an AD converting circuit and an N shift register group, and the video signal synthesis circuit selectively realizes the monitoring of the video signal electrical level according to data and displays the detection results through the screen mainboard, thus the invention has the function of monitoring the video signal electrical level.

Description

technical field [0001] The present invention relates to digital video signal processing technology, in particular to video signal level monitoring technology Background technique [0002] In the production process of TV programs such as TV studios and shooting sites, it is particularly important to detect and control the quality of the video. If the video quality is not good, there will be "snowflake" interference in the image, or out-of-sync, image rolling or distortion, and color distortion. In order to obtain high-quality TV programs, the stability of the peak-to-peak value of the video signal level is very high. If you only monitor one video signal, you can use a waveform monitor to monitor it. Dozens of channels of video images are displayed on the monitor, and the video signal levels are required to be monitored at the same time. Obviously, it is unrealistic to use dozens of waveform monitors to monitor the video signal, and the operation is also very inconvenient, es...

AI Technical Summary

Problems solved by technology

In order to obtain high-quality TV programs, the stability of the peak-to-peak value of the video signal level is very high. If you only monitor one video signal, you can use a waveform monitor to monitor it. Dozens of channels of video images are displayed on the monitor, and at the same time it is required to monitor the video signal level. Obviously, it is unrealistic to use dozens of waveform monitors to monitor the video signal, and the operation is also very inconvenient, especially in the case of on-site shooting.

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