From: "Gavin Hamill" <[EMAIL PROTECTED]> > I'm not sure what DVB-SI is > (is the one pertaining to CAMs and encryption?)
No, DVB-SI is "DVB Service Information". Look at it this way: MPEG-2 defines the _base_ of a digital television system, but leaves many things open, e.g. how to transmit network-specific reception information, service names, etc. Thus, DVB-SI is what "completes" MPEG-2 to a full digital television system, DVB. ATSC is a different "completion" of MPEG-2 and uses different data formats for service information. I think the main difference is that DVB-SI uses the same table and descriptor format that MPEG-2 uses, while ATSC uses fixed-size tables, which are easier to parse, but are not consistent with the MPEG-2 base. > It's interesting to note that the reason we dropped from using QAM64 / > FEC2_3 was to 'improve the picture quality' (reduce UNCs in fringe > areas) but the lower available bitrate means each station is now > transmitting a lower quality picture. Again, so much for progress... Oh, so there's no more QAM64 DVB-T in the UK? Hmm, I think it will _have to_ return some day, because HDTV is very bandwidth hungry :-) Regards, -- Robert Schlabbach e-mail: [EMAIL PROTECTED] Berlin, Germany -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
