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  1. twey

    1080i YPrPb-->VGA Transcoder

    peebee: The formulas you shown for the Y/Pb/Pr are for the old NTSC/PAL standard (525/625). It does not match with HDTV (1080/720) standard. Here is the one for HD: Y' = 0.2126R'+ 0.7152G'+ 0.0722B' Pb = [(0.5/1-0.0722)]/(B'-Y') Pr = [(0.5/1-0.2126)]/(R'-Y') And, all three signals has...
  2. twey

    Sending video and data on same RF channel

    You should not add the data by just modulate on the same carrier. The NTSC RF has two carriers: Video and Audio. The Video is AM and Audio uses FM. The video has bandwidth little more than 3 MHz and audio about 4.5 MHz +/- 250 KHz. Therefore, any straight modulation on the same RF frequency...
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