Search found 478 matches

by PID_Stop
Mon Sep 11, 2017 10:35 am
Forum: Ask the Engineers
Topic: JPEG2000 Adaptive Bitrate live streaming
Replies: 6
Views: 303

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: 303

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: 303

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: 223

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: 223

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: 285

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: 1140

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: 225

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: 3738

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: 5139

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: 3738

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...
by PID_Stop
Wed Mar 29, 2017 10:17 am
Forum: Ask the Engineers
Topic: Sony BVH-2180-PS: Servo Error
Replies: 61
Views: 5139

Re: Sony BVH-2180-PS: Servo Error

Hi Jeff, many thanks, now I tried this test. When press the button below the switches on CD-17 and then Standby, the drum starts to rotate but makes a clickering sound... clac clac clac.... about 3 to 4 times per second. this sound is not there in normal operation mode ( 000 instead of D00 ) In D00...
by PID_Stop
Wed Mar 29, 2017 10:04 am
Forum: TV Engineering
Topic: Old analog Gear, need manuals, etc.
Replies: 40
Views: 3738

Re: Old analog Gear, need manuals, etc.

Hmm, right now I've just been planning on plugging stuff like VCRs and old video game consoles into it. I'd love an HDMI -> NTSC SD converter that would take blackburst, but something tells me that's not the sort of thing I'd be able to find on ebay for a $30 price tag :P. You will absolutely need ...
by PID_Stop
Tue Mar 28, 2017 9:06 am
Forum: TV Engineering
Topic: Old analog Gear, need manuals, etc.
Replies: 40
Views: 3738

Re: Old analog Gear, need manuals, etc.

After doing some research, I picked up a Horita BSG-50 Blackburst Generator for $30 off ebay, and a For.A FA-210 Time Base Corrector for a similar price. If I understand everything correctly, the blackburst generator would go into both the TBC and the A51, and my input video would go into the TBC a...
by PID_Stop
Mon Mar 27, 2017 9:31 am
Forum: Ask the Engineers
Topic: Sony BVH-2180-PS: Servo Error
Replies: 61
Views: 5139

Re: Sony BVH-2180-PS: Servo Error

Good morning Martin, I double-checked the test procedure on the machine in the control room, and discovered that I forgot a step: after you set the test mode ("D 0 0") and press the test button on the CD-17 board, you need to press the STANDBY button on the front panel. Then you can take a look at t...