> > If you don't encode with PAL/M, then some TV sets won't work. Also, even > > on TV sets that supports multiple standards, sometimes we need to > > disable autodetection of NTSC, because this is broken on some TV sets. > > I've personally experienced this trouble with two TV sets, including a > > brand-new LCD1080p TV set I bought this year. On some conditions, if you > > let auto NTSC/PAL-M enabled, it miss-detects the color carrier, and > > changes to the other standard (missing the colors) for some seconds, and > > then returns back. So, you have moments with colors and moments without. > > > > It should also be noticed that there are several devices (TV sets, DVD > > players, etc) manufactured abroad that people assumes that PAL/M color > > carrier is equal to NTSC (AFAIK, the same occurs with PAL/Nc). Since the > > color carriers are somewhat different, this produces a very annoying > > effect: the color image will present a static image as a image with > > colors moving, since there will be a frequency shift between the > > horizontal frequency rate and the pixel sampling rate (that are derived > > from the color carrier on several decoders), causing color detection > > misleading at the pixels. So, the pixels at the boundary of a shape have > > their colors oscillating. > > Very interesting. I honestly thought that all TVs everywhere (except > perhaps very old ones) would be able to handle 'standard' PAL or NTSC on > their Composite and S-Video inputs.
The difference between an NTSC-M system and PAL-M system is very slight: http://www.pembers.freeserve.co.uk/World-TV-Standards/Transmission-Systems.html since the 'M' determines most of the parameters. The color burst on the CVBS would be the only difference. I can see how color burst could be detected wrong on CVBS. I'm not sure how the chroma baseband signal in S-Video would get messed up though. Regards, Andy > Chaithrika, can you take a look at this based on Mauro's input? > > Regards, > > Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
