Analog camera, AV video signal line decoding, PAL system NTSC, input decoding display, finally fix, record!

We commonly used cameras, monitoring, and so on, most of them are AV signals, domestic standards are pal, using coaxial, transmission, the advantage is that the transmission distance can be very long, and simple line. AV cameras are also used mostly in video arrays.

Commonly used set-top boxes, televisions, STB final output of the image signal to the TV, most of them are cvbs, mixed signals, wherein the video signal is Av,pal format.

So the PAL standard signal is quite popular and also quite applicable. Before the CMOS camera driver, most of the message line, TTL level, because the signal line, not easy to form an entire column, such as the two horses to engage in the car panorama camera should be AV signal, we can also look at their car, reversing the camera is not AV interface.

This must take care of AV interface video decoding.

So the use of TVP5150 decoding IC, through the Verilog language to prepare the IIC communication protocol, the IC configuration register, start decoding.

Through the IC output of the PCLK, according to the bt565 format for decoding, YUV mode, according to the odd and even field storage to SDRAM

Finally, the FPGA drives the VGA display, reads the frame image from the SDRAM to display,

This completes the entire decoding process!

Here are the actual results!

Then a video display of a simulated industrial camera capture.

The AV output image of the set-top box is decoded, and the LCD is driven by VGA

Analog camera, AV video signal line decoding, PAL system NTSC, input decoding display, finally fix, record!