First, thanks for the positive comments. From our first venture into DTV in 1998 we have tried to make a professional presentation equal to our analog product even though there were very few viewers. From the beginning our DTV channel has been fully automated with full master control switching, HD satellite distribution, HD tape recorders, HD video file servers, and so on. Believe it or not, I just yesterday got a call from the sales department asking if we could air a Mitsubishi HD commercial. I hated to tell them I had been waiting four years for the call!!!!
I'll try to answer all your questions:
You are correct about the location of our studio at 5th and Market streets in Philadelphia. The transmitter is located in Roxborough. We use a 7ghz microwave STL to get the analog and digital signals to the respective transmitters. The 7ghz channel is 25 mhz wide and we put 2 separate signals in the channel, one analog and one digital. The analog signal is frequency modulated on a carrier located down 4.5mhz from the channel center. Included are 4 audio sub carriers. The digital signal is 8vsb modulated on a carrier located up 3.5mhz from the channel center. The ATSC encoder is located at the studio and the 19.2mb stream is sent by microwave to the transmitter.
JWhip correctly answered your question about the DD audio. The network does not have the routing equipment to distribute 5.1 channels of audio.
There is no plan to produce news programming in HD. We are about to replace all of our Panasonic DVC-PRO equipment and there have been no discussions about a move to 100mb DVC. In fact, we are not considering a move to 50mb DVC. We use 25mb equipment now and plan to continue in the future. As a side note here, and I know you are probably aren't interested in nasty old SD stuff, but, we have just converted to a new video file server for news playback. For news we shoot using 25mb DVC equipment. The digitally recorded tape is ingested at 4 times normal speed into a digital non linear editor. The video is edited and the final cut is FTP'd to a really big SGI video server. The server plays the edited clips to air. The video looks a million times better than the old Sony Beta tape editing stuff looked. Stays digital from lens to switcher, 25mb DVC compression all the way, no generation losses. Take a look and let me know what you think.
Letterman. I believe Letterman's new contract calls for HD when the equipment now in use must be replaced. Don't know a lot about this one.
I was not aware of the time accuracy issue until I read a thread here on the forum about a month ago. We do have NBS time in the building and are investigating ways to get into the PSIP computer. Getting the program information into the PSIP is something we have been working on for some time now. You have to keep in mind that in order to accomplish something like this it must be automated and require no human intervention. Adding a person to enter information into the PSIP computer is about as likely as a positive answer to your last question. We have been working on an interface between our automation system and the PSIP computer. We actually are quite a way down the road on this and might have something soon. All depends on other priorities.
No, I have never dated Pat, though I have known her for over 20 years. I did take an elevator ride with her once where she told me my cigar stunk and I told her hair looked like she stuck her fingers in a light socket. Does that count?
James M. Chase
Director Broadcast Operations & Engineering
KYW-TV / WPSG-TV
101 South Independence Mall East
Philadelphia, PA. email@example.com