Search found 482 matches

by PID_Stop
Thu Oct 19, 2017 3:03 pm
Forum: TV Engineering
Topic: More Bad Sports Audio on Fox
Replies: 9
Views: 288

Re: More Bad Sports Audio on Fox

...it is a disservice to put out a product where most listeners can't understand Joe because of a bad mix. No disagreement there. I'm simply observing that it's not a trivial exercise to make a mix that sounds good in mono and in stereo and in 5.1, especially in a sub-par environment like a truck.
by PID_Stop
Thu Oct 19, 2017 12:11 pm
Forum: TV Engineering
Topic: More Bad Sports Audio on Fox
Replies: 9
Views: 288

Re: More Bad Sports Audio on Fox

Another factor in play is the number of ways people listen to the audio -- everything from small monaural sets to stereo to large 5.1 surround setups. A reasonable 5.1 mix with lots of crowd ambience might not downmix well to stereo, or to mono. Moreover, you have the vagaries of how stations map au...
by PID_Stop
Tue Oct 17, 2017 3:23 pm
Forum: Ask the Engineers
Topic: Wanna Play "Guess What's in the Grey Box?"
Replies: 10
Views: 321

Re: Wanna Play "Guess What's in the Grey Box?"

"Clean Box Pro"? Not quite...

Jeff
by PID_Stop
Wed Sep 20, 2017 2:12 pm
Forum: Ask the Engineers
Topic: Engineers SOS
Replies: 9
Views: 428

Re: Engineers SOS

We certainly don't do it for the money! I suspect most of us are drawn toward big equipment with high voltages that could end our afternoon with a noisy, smelly flash... rather like a jumbo bug zapper.

Or maybe it's because we get to watch TV or listen to the radio all day.

:lol:

Jeff
by PID_Stop
Mon Sep 11, 2017 10:35 am
Forum: Ask the Engineers
Topic: JPEG2000 Adaptive Bitrate live streaming
Replies: 6
Views: 368

Re: JPEG2000 Adaptive Bitrate live streaming

For television stations in the United States, the most obvious use case is ATSC program encoding, which is MPEG2 with AC3 audio. We happen to use Harmonic Electra 9200 encoders, which incorporate several encoders with statistical multiplexing. We also stream MPEG4 over IP between our hub and spoke s...
by PID_Stop
Wed Sep 06, 2017 8:51 am
Forum: Ask the Engineers
Topic: JPEG2000 Adaptive Bitrate live streaming
Replies: 6
Views: 368

Re: JPEG2000 Adaptive Bitrate live streaming

Hi Michal, Within our facilities, we work with uncompressed video -- HDSDI. The only reason we do encoding of various sorts (MPEG2, MPEG4, JPEG2000) is to get the bitrate down to a rate that is reasonable to record or transmit over an RF or IP link. Recording equipmnent typically has its own CODECs ...
by PID_Stop
Thu Aug 24, 2017 9:11 am
Forum: Ask the Engineers
Topic: JPEG2000 Adaptive Bitrate live streaming
Replies: 6
Views: 368

Re: JPEG2000 Adaptive Bitrate live streaming

We used a JPEG2000 link a number of years ago to move an HD program feed from our regional control center in one city to one of our stations in another city... it was a Leitch 6800+ series card set, which tells you how long ago this was. The system had almost no delay, on the order of several frames...
by PID_Stop
Mon Aug 21, 2017 12:06 pm
Forum: Everything else
Topic: 2017 Eclipse
Replies: 4
Views: 304

Re: 2017 Eclipse

I'd take a nap too, but my employer might not appreciate it! The view from our centralcasting control room is remarkable: the networks are doing extensive special report coverage of "THE GREAT AMERICAN ECLIPSE", as David Muir insists on calling it. I haven't heard such a combination of breathless in...
by PID_Stop
Mon Aug 21, 2017 7:03 am
Forum: Everything else
Topic: 2017 Eclipse
Replies: 4
Views: 304

2017 Eclipse

And this morning I finally got the question I've been expecting for a week: "Do we have satellite backup for this afternoon when the sun goes out?"

Sigh.
by PID_Stop
Thu Jul 27, 2017 11:23 am
Forum: Digital Television
Topic: How is it done?
Replies: 3
Views: 328

Re: How is it done?

Welcome to the forum, Florian! One of the key points about live digital television is that is it not generally file-based; instead, you are feeding some video source (a camera, the output of a switcher, for example) into an encoder that converts the audio and video into a real-time transport stream ...
by PID_Stop
Tue May 09, 2017 6:58 am
Forum: Everything else
Topic: PRINTED CIRCUIT BOARD MANU.
Replies: 15
Views: 1302

Re: PRINTED CIRCUIT BOARD MANU.

Thanks, as I know PCB stands for Printed Circuit Board is a thin board made of fiberglass, composite epoxy, or other laminate material. It’s connected with different components such as transistors, resistors, and integrated circuits. If your posts are an example of your company's services, you're t...
by PID_Stop
Wed Apr 26, 2017 8:09 am
Forum: Ask the Engineers
Topic: Compression Ratios
Replies: 1
Views: 254

Re: Compression Ratios

It's your first answer: the data compression ratio is the proportion of uncompressed size or rate to the compressed size or rate. Wikipedia's article goes into more detail. Where many people get confused is on the difference between data compression versus audio level compression -- the two are enti...
by PID_Stop
Wed Apr 05, 2017 11:32 am
Forum: TV Engineering
Topic: Old analog Gear, need manuals, etc.
Replies: 40
Views: 4035

Re: Old analog Gear, need manuals, etc.

Ok, so with the combined powers of a Horita BSG-50 blackburst generator, and For-A FA210 time base corrector, I can really do some wacky stuff to video! These warps are ridiculous and amazing, it's like the controls go from "oh, this is pretty subtle" to "huh, this has very little resemblance to th...
by PID_Stop
Fri Mar 31, 2017 10:13 am
Forum: Ask the Engineers
Topic: Sony BVH-2180-PS: Servo Error
Replies: 61
Views: 5590

Re: Sony BVH-2180-PS: Servo Error

Hallo, I got both Manuals now and started a lot of measuring... On TP 15 there seems to be nothing... But one thing seems strange ( maybe ) I have an NTSC version of CF-17 an when I put this board in, I get the same error ( after 15 seconds switch of and system error... Is this ok or does it mean t...
by PID_Stop
Thu Mar 30, 2017 9:20 am
Forum: TV Engineering
Topic: Old analog Gear, need manuals, etc.
Replies: 40
Views: 4035

Re: Old analog Gear, need manuals, etc.

Yup. We used to have an early animation system that ran on a 386 with optional math co-processor chip. It would take about five minutes to render a frame; when it had finished, it readied up the BVH-2000, performed a one-frame insert edit, then took the VTR back out of standby... and the whole proce...