I want to know if ADV7181 can work as a chanel CVBS decoder and a channel VGA decoder. I also need a VGA encoder,please recommend.
The schematic digram is below. Thanks.
It seems you want decoder CVBS and VGA at the same time by ADV7181, and then mux the two channels streaming into one by Video Processor, and then using VGA encoder to formulate the video into VGA style ?
Tank you for your reply. what you said is I want to do. please recommend the VGA decoder and encoder.
在 2012-01-03 17:52:52，"H.264Tech" <email@example.com> 写道：
Analog Devices EngineerZone
please recomment proper VGA decoder and VGA encoder
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ADV7181 won't decode VGA.
ADV7181C can decode VGA but RGB output only as DDR RGB stream.
ADV7401/3 will be easiest solution: will output YCbCr422 8-bit 656 for CVBS and RGB444 for VGA.
Now in terms of encoder:
- I don't believe we have any that takes in 656 and outputs as VGA
Viable option for VGA will be only ADV7123/5 for VGA output; it will require RGB444 input.
656 is a stream dedicated originally for 480i/576i and won't handle VGA (VESA) standards
Thanks Witold. You mean ADV7181C can decode VGA. Its input mode can support RGB/HS/VS. But if its output mode
can support Ycbcr 4:2:2 Bt.656 or bt.1120?
ADV7181C can decode VGA and output it as a RGB 444 or YCbCr444 stream.
656 will work for mainly for 480i and 576i inputs, as 656 standard was origianlly introduced for it.
Standard VGA 640x480 script will not work allow for 656 output.
Thanks. If I use FPGA to convert RGB 4:4:4 or YCbCr 4:4:4 into YCbCr 4:2:2,and then insert AV code to produce BT.1120 data stream. Do you think it is feasible?
Feasible for feeding to what?
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