|Originally posted by rad
.....on tonights 7PM showing of the Simpsons the picture wasn't the normal 4:3 of the network feed.
That picture size change was me experimenting. It was only for 4-5 minutes. I was trying to act on some information the network told me at one time regarding the 16:9 feed they send out. I was told to "just pass it through" the Faroudja upconverter. When I asked what zoom mode to put it in (4:3, 14:9, 16:9) I got an imprecise answer. I indicated to them I found that 16:9 seemed to look the best, and that is the way we have been operating since we were ordered to output the 480P format. I was trying the 4:3 mode, and it didn't work, did it.:D FYI, the network sends us a 16:9 480i signal. It is a separate digital satellite feed, not the same feed we use for the NTSC path.
We have inserted a considerable chunk of delay in the audio path of the DTV feed. We have noticed the delay time seems to change, some function of the encoding and decoding process. We try and get it right on, but then the next time it is checked it has changed. There is no precision "scope" we can use to set this with. I observe the picture on the Sony consumer TV or the Harris demod monitoring system and tweak the delay box until it looks good.
Another interesting note, ever get two different DTV systems side-by-side, or even the same manufacturer for that matter, and you will hear a very distinct echo in the sound from the delay difference coming out of the two systems. The picture cuts seem to happen the same on the two screens, it is just the audio that varies between receiver systems. We have been observing that peculiarity since day one.