Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [video]

Specify video format, e.g. NTSC, ATSC, VGA, etc.

364 questions
29
votes
3 answers

Why does VGA have so many ground pins (compared to DVI-I for example)?

If you look at the pinout for VGA, there are several ground pins: I was curious as to why, and I found this answer. To sum it up, the extra ground pins are so that each pin has its own ground in order to prevent interference in the analog…
user112513312
  • 523
  • 2
  • 5
  • 7
24
votes
2 answers

What is this inductor symbol from a video circuit?

This is from the datasheet for the TDA8217 PAL decoder and video processor. This is the "Applicaton Diagram". The circled item is unfamiliar to me, I asked at my local electronic components distributor and no-one there recognized it either. It…
hyarion
  • 345
  • 2
  • 6
20
votes
2 answers

What is the purpose of this device?

I found this device in my father's basement, but I can't figure out what this device is. It has only 1 SCART connector, 1 power cable and only 1 button in front of it. I think it may be some old video decoder, but I'm not sure. These are the images…
brko
  • 211
  • 2
  • 5
16
votes
4 answers

What is a digital video port?

I see a few questions here casually mention that image sensor modules have a "standard parallel digital video port (DVP) or ... MIPI high-speed serial interface" "Where do I start with embedded video?" "Processor with hardware camera interface…
davidcary
  • 17,426
  • 11
  • 66
  • 115
16
votes
4 answers

Where do I start with embedded video?

My boss recently asked me how difficult it would be to design a product that could continually record fairly low quality video and store the last few hours in some form of internal memory. I have never done any development with video before. Where…
PICyourBrain
  • 3,695
  • 10
  • 41
  • 55
14
votes
2 answers

Generating PAL tv signal using a PIC

I'm trying to generate PAL tv signals using a PIC24FJ64GB002 using a similar method to the circuit described half way down this page. The only difference is that my circuit needs to run at 3v instead of 5v due to using a PIC24 so I've recalculated…
John Burton
  • 2,086
  • 4
  • 23
  • 34
13
votes
2 answers

How do analog video signals work

I have always wondered how an only 1 wire line (signal and ground) can make a whole color image appear on a screen full of thousands of pixels. How exactly do these signals work and what characteristics make tv's show different things?
skyler
  • 10,136
  • 27
  • 80
  • 130
12
votes
1 answer

Troubleshooting a faulty filter circuit in a PAL CRT display

I have an old CRT monitor (Phillips CM8833) which I am attempting to repair. When displaying a composite PAL signal, it only shows a black and white image, but it is still able to display RGB signals correctly. The composite signal is filtered into…
Kaz
  • 468
  • 2
  • 12
9
votes
4 answers

Why can't analog video be compressed like digital video (example inside)?

I'm learning the basics of analog and digital TV signals and I came across this (original link, now gone) short article (see the next page as well). Why can't analog video signals be compressed in a similar way to digital signals when using MPEG-2…
4nt
  • 354
  • 4
  • 12
8
votes
2 answers

Does VGA have to be drawn at 60hz?

I'm wanting to generate a VGA signal hopefully as painlessly as possible. I have an odd question though. Everywhere I see that VGA requires a 25MHz clock for the sync signals. Is it possible to just draw the screen slower? Like only refresh it at…
Earlz
  • 3,346
  • 15
  • 46
  • 66
8
votes
4 answers

Why do most FPV 5.8 GHz video transmitters use PAL or NTSC?

I am not much into the details of video transmission in general. However, I wonder since most displays and electronics are digital, why have suppliers for FPV equipment chosen an analog transmission system, which moreover is limited to 30/24 fps and…
user52836
7
votes
5 answers

How can I control a CGA screen with an Arduino?

I'm getting one of these http://www.old-computers.com/museum/computer.asp?st=1&c=446 I'm planning to build a server inside it. And I was thinking of using the built in CGA-monitor as a statusdisplay (LCDInfo style, or whatever the cool geeks use…
Christian Wattengård
  • 394
  • 1
  • 5
  • 12
7
votes
3 answers

Learning videos for electronic concepts?

Are there any interesting and graphical videos for learning electronic concepts, like basic principles of capacitor, inductor, resistor, transistor and other advanced concepts like digital electronics? I am mostly looking for animated videos which…
Kevin Boyd
  • 1,971
  • 4
  • 23
  • 28
7
votes
5 answers

VGA to HDMI converter

I'm making a little project purely as a hobby using a small FPGA breakout board. I'm outputting VGA video which works fine, but would like HDMI output instead so I can connect to a television that has that input but no VGA. I don't believe it's…
John Burton
  • 2,086
  • 4
  • 23
  • 34
6
votes
1 answer

VGA Decoding - Dealing with tolerances

Update: The VGA Simulator is up and running. You can go simulate your own designs or just use the example file to see it working. I also wrote a blog post to help anyone get started using it for their own VHDL designs. I am making a VGA simulator…
MLM
  • 848
  • 2
  • 14
  • 26
1
2 3
…
24 25