Welwynnick
Distinguished Member
Ive been thinking about importing a 1080p DLP RPTV from the US. The price/performance is very attractive, but every man and his dog is quick to point out all the downsides to doing this, so I don't want to go all over that again. Being able to plug in a DVHS player would be nice, but Id like a bit more future proofing than that. The fundamental obstacle seems to be that US TVs are NTSC only. I had always assumed that using a scaler would not be the solution, but Im questioning that now.
Ive shied away from properly understanding TV ever since my university lecturer brushed off colour TV: Oh thats all very clever, very complicated. We dont have time to go into that. And that was an electronics degree! But now I am wondering what the fundamental processes that TV really performs are:
1. Capture a moving picture at 50Hz
2. Scan the picture into 576 interlaced lines (RGB video)
3. Convert RGB video into component (luminance + red complement + blue complement)
4. Convert component into luma + chroma
5. Encode luma, chroma and audio into composite
6. Modulate composite onto RF
Yes, I know its much more complicated than that, but Im just trying to account for the differences between NTSC and PAL that affect us. The important thing seems to be that each one of those processes are different for the different standards. However, when videophiles take, say RGB from a STB or DVD and process them with a scaler, they are hopefully left with the original very basic RGBHV video signal that is processed back to the native resolution and frame rate of the display.
That display, whether it happens to be a TV or not, is acting as a monitor. Doesnt a monitor take video at a low enough level for there to be no more differences between the original video standards? So, as long as I use it as a monitor (which I would anyway), can I use a US TV in the UK?
Nick
Ive shied away from properly understanding TV ever since my university lecturer brushed off colour TV: Oh thats all very clever, very complicated. We dont have time to go into that. And that was an electronics degree! But now I am wondering what the fundamental processes that TV really performs are:
1. Capture a moving picture at 50Hz
2. Scan the picture into 576 interlaced lines (RGB video)
3. Convert RGB video into component (luminance + red complement + blue complement)
4. Convert component into luma + chroma
5. Encode luma, chroma and audio into composite
6. Modulate composite onto RF
Yes, I know its much more complicated than that, but Im just trying to account for the differences between NTSC and PAL that affect us. The important thing seems to be that each one of those processes are different for the different standards. However, when videophiles take, say RGB from a STB or DVD and process them with a scaler, they are hopefully left with the original very basic RGBHV video signal that is processed back to the native resolution and frame rate of the display.
That display, whether it happens to be a TV or not, is acting as a monitor. Doesnt a monitor take video at a low enough level for there to be no more differences between the original video standards? So, as long as I use it as a monitor (which I would anyway), can I use a US TV in the UK?
Nick