• Commodore 64 5-DIN Video Cable
    4 replies, posted
I just undug a Commodore 64 with a 5 pin DIN video cable, but its a little strange It has White, Red, Yellow and Blue RC connectors. [IMG]http://i264.photobucket.com/albums/ii179/aug440/2013-05-22185113_zps3e40c5e9.jpg[/IMG] Anyone know what the blue cables for? [editline]22nd May 2013[/editline] Got it working, the colors on the cables and the monitor are completely mismatched (I used a Y cable to put the blue and yellow together) and Red is black and white for some reason. [IMG]http://i264.photobucket.com/albums/ii179/aug440/2013-05-22194331_zps45532d9f.jpg[/IMG]
That's weird. I have no idea why you had to join the blue and yellow together. The yellow should work on its own as a composite video out. The red is for luminance only. The white and blue might be for audio in and audio out?? I'm trying to match the cable to the [URL="http://old.pinouts.ru/Multimedia/AudioVideoC64_pinout.shtml"]pinout[/URL]
[QUOTE=ShaunOfTheLive;40747256]That's weird. I have no idea why you had to join the blue and yellow together. The yellow should work on its own as a composite video out. The red is for luminance only. The white and blue might be for audio in and audio out?? I'm trying to match the cable to the [URL="http://old.pinouts.ru/Multimedia/AudioVideoC64_pinout.shtml"]pinout[/URL][/QUOTE] The yellow one its own didn't work at all.
The Blue cable provides Chrominance, essentially in every video signal there is a period in the signal (known as the 'color burst' period) where the color information is provided to the television before providing the scanline information. Without color: [IMG]http://www.rickard.gunee.com/projects/video/pic/vinfo_hline.png[/IMG] With Color: [IMG]http://www.rickard.gunee.com/projects/video/pic/vinfo_hline_color.png[/IMG] The yellow cable by itself provides the image/scanline data. I'm not sure why this outputs the chrominance and the image data on seperate cables, only to be recombined later. Normal composite outputs provide both the color data and scanline data on the Yellow line. My only other guess is that the yellow cable goes Hi-Z during the color burst(Meaning it disconnects, leaving the input floating), thus breaking the scanline signal and rendering no picture.
[QUOTE=LoneWolf_Recon;40784205]The Blue cable provides Chrominance, essentially in every video signal there is a period in the signal (known as the 'color burst' period) where the color information is provided to the television before providing the scanline information. Without color: [IMG]http://www.rickard.gunee.com/projects/video/pic/vinfo_hline.png[/IMG] With Color: [IMG]http://www.rickard.gunee.com/projects/video/pic/vinfo_hline_color.png[/IMG] The yellow cable by itself provides the image/scanline data. I'm not sure why this outputs the chrominance and the image data on seperate cables, only to be recombined later. Normal composite outputs provide both the color data and scanline data on the Yellow line. My only other guess is that the yellow cable goes Hi-Z during the color burst(Meaning it disconnects, leaving the input floating), thus breaking the scanline signal and rendering no picture.[/QUOTE] The reason for splitting the NTSC signal amongst several wires is simple, it's to reduce screen artifacts. When you use composite video; Chroma, luma and color burst are multiplexed into a single signal. This process causes degradation in each of the signals and causes the common NTSC artifacts (dot crawl, shimmering, etc.) Separation of the signals stops or greatly reduces this problem.
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