Registered: Aug 2002
Location: Maidenhead, UK
Re: Component (yuv/rgb) video out on DirectTiVo
Originally posted by swinokur
I'm wondering if anyone has ever added component video (either rgb or yuv) output to their tivo.
I'm looking at the service guide for the Sat-T60, and I notice that the video is encoded by a Philips chip, the SAA 7120. This chip accepts MPEG encoded data, 8 bits wide as Cb-Y-Cr (CCIR 656), according to the data sheet.
It only has dacs for Y, C, and CVBS...
So I go poking around the internet, and I run across a different video encoder, the Analog Devices 7175A/71776A.
This device also accepts CCIR-656 data as input, but has video output for CVBS, YC (aka svhs), YUV/RGB, and EuroSCART.
Does anyone think that a modification to the Tivo using the analog devices chip would be possible? I suspect that one of the biggest issues would be all the soldering required to get the appropriate signals from the tivo onto whatever daughtercard this new chip and its support circuitry/wiring/sockets would require)
Maybe the wonderful folks at 9th Tee would like to play with this notion...
It looks from my cursory research that the series 2 units didn't add component outs, so this might be a modifiation that the new units could use too?
Anyway, that's my thought experiement for this Sunday afternoon. :-)
I suspect that it is possible - a similar product is marketed in the UK - though for a slightly different purpose. Here a number of companies have produced little daughter boards that tee-off the YCrCb digital data from ICs in DVD players and Digital TV set-top-boxes to add serial digital outputs (i.e. 601/656 SDI) for connection to broadcast and high-end professional gear - so a similar solution might be possible to add analogue component (i.e. not replacing the existing output chip but adding a secondary one?) It isn't the sort of soldering and addition I'd like to have to do though.
(Luckily us UK Tivo owners have RGB in and out on our Tivos - though we don't have S-video connectivity. This is mainly because most UK digital TV set top boxes and TVs have RGB I/O - but few STBs have S-video)
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