Quote:
Originally Posted by kx250rider
I got a new HD TV device which uses my LCD computer monitor for display, and the computer for controls....COMPLAINT: The picture has a stop-n-start jerkiness to it, and the audio track is slightly out of sync with the picture. ....
Charles
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Jerkiness is not normal for a digital TV - blame it on trying to use a device (computer) with an operating system (Windows) which was never meant to do real-time video and audio, although many people are trying to make it happen. Computers that are sold as AV devices should not do this, as the manufacturer should have checked the compatibility of everything; but when you plug an external device into an existing machine, most bets are off. I have an ATI digital video card in my desktop machine that I built about 16 months ago (ASUS MB and AMD CPU), and it works fine with no freezes or skips -BUT it always puts up a warning message saying that there MAY not be enough computing power for maximum video quality, blah blah. Then it works fine for live viewing anyway. I have noticed that the RECORDED video (MPEG4) is not as good as the direct viewing, but I don't don't know if that's related to the warning message. I suspect not, as it doesn't skip or freeze, just has typical compression artifacts that lead me to believe the commpression algorithm/parameters could be better.
Mismatch of video and audio (lipsync) is a serious issue which the industry is devoting many man years to fix. It is not just due to the receiver (although it may be in some cases), but also due to the fact that audio and video take entirely different paths in modern TV plants, with different processing delays that have to be matched at each step. If you pay attention these days, you can find analog broadcasts with lipsync problems too. Sooo - if it's a constant problem with your setup, at least part of it may be your setup - but it could be the broadcaster - hard to tell.