Originally posted by sdsalsero
My friend thinks that ABC sends out a higher-than-HD digital file which each local station then converts to their own 'personal' version of ATSC. If so, this just goes to prove that KGTV (San Diego's ABC station) needs to buy new equipment! They've already proven to have terrible reliability - losing the HD transmission on a seemingly regular basis during prime-time.
The bit about the higher-than-HD thing is supposed to be true. The typical network feed is supposed to be something like 45 Mpbs and the affiliates use their own equipment to rate-reduce it to suit their own purposes. (They might be using some of their bandwidth for multicasting or datacasting).
I haven't found KGTV to be particularly unreliable and their programming has been some of the most beautiful HDTV that I've seen--certainly the most beautiful broadcast stuff. Lost
is breathtaking and, before the series ended, NYPD Blue
was extremely good as well. The only other thing I watch on the channel is Boston Legal
, which is decent.
FYI - my friend also suggested that my local transmission might not be at full bandwidth, but it is (according to HDTV2mpeg). And as far as I know they never did multicasting during the elections.
When you run HDTVtoMPEG2 on a ransport stream, what information does it give you about the average rate of the program that you extract? The transport stream itself has
to be padded out to 19.4 Mbps, as per ATSC standards.