Questions tagged [video]
Specify video format, e.g. NTSC, ATSC, VGA, etc.
382 questions
3 votes
1 answer
284 views
How can I convert a progressive HDMI signal (e.g., 720x576p) to an interlaced PAL (576i) output using external hardware?
I’m working on a video pipeline where the source is an NVIDIA Jetson Orin Nano module. The HDMI output from the Jetson only supports progressive video modes (such as 720p or 1080p), and I need to ...
2 votes
1 answer
106 views
Understanding H/V sync circuit in RGBHV distribution amplifier
As a hobby project and a way to learn, I'm trying to make a 1x2 RGBHV distribution amplifier. I've got the amplification for the RGB part mostly figured out but I'm clueless on how to deal with the H/...
- 31
4 votes
1 answer
123 views
Problem in demodulating PAL signal
I am trying to demodulate an analog video signal of PAL format and encountered a problem in demodulating the color part. So my input data is as follows: I have 2500 spectra, spectrum width 200 MHz, my ...
- 41
0 votes
2 answers
123 views
Measuring output power of amplifier
I want to measure the output power of signal from amplifier because I want to verify the signal amplification and distortion. How can I do so? For information, it is a 2.4 GHz sunhans amplifier. I am ...
- 11
4 votes
1 answer
525 views
How to generate 640x600 resolution on a VGA monitor?
If a monitor can display 640x480 and 800x600 resolutions, then is it possible to display 640x600? I am generating my own video signals with an FPGA and an LCD monitor (1680x1050 max resolution, but ...
- 247
-1 votes
2 answers
117 views
Genlock signal characteristics
I'm designing a board and I need to buffer and multiplex Genlock signals. The specification lists NTSC/PAL color black, HD tri-level sync, and DARS, so think those are both analog and digital video ...
- 3,306
-1 votes
1 answer
102 views
The output format is YUV 4:2:0 for the camera OV5642
I cannot figure out the output data format YUV 4:2:0 for the OV5642 camera. The documentation datasheet OV5642 on page 99 states that one of the possible output sequences is YYYY.../ YUVV.... But how ...
- 3
1 vote
2 answers
184 views
How to calculate stripline asymmetric impedance on Saturn PCB toolkit?
I am designing a PCB layout. This PCB contains 75 ohm video traces. Also, these traces only give output from the connector to another connector. When I make a calculation in the stripline asymmetric ...
- 129
0 votes
1 answer
217 views
FPS Control for OV7670
Can anyone clarify if cameras like the OV5642 or OV7670 have a relationship between FPS and the XCLK frequency supplied to the camera from an external oscillator? Specifically, can I achieve FPS lower ...
- 1
1 vote
1 answer
1k views
How to create a composite video signal from Hsync, Vsync and Video?
I have an old Philips P2000 home computer, which outputs three signals: Hsync, Vsync and Video. Unfortunately, I do not have a monitor or screen that can take these as inputs, but I read online, that ...
- 469
5 votes
4 answers
894 views
How can I make a PAL sync generator without a microcontroller?
I would like to build a SIMPLE circuit that generates PAL sync signals with no MCUs, because they don't make any ICs of these kind anymore. I have already tried a solution, but I think it is ...
- 119
2 votes
2 answers
157 views
What does a grid-cathode bypass capacitor on CRT do, and why is this one not doing it?
I have modified a (US) 1970s solid state B&W TV set for direct (NTSC) composite input for vintage computer use, in accordance with some equally vintage instructions specific to this set. The set ...
- 2,163
0 votes
0 answers
82 views
How to change the gain for this amplifier?
I'm modifying a hot-chassis TV to add a Y/C input. To isolate the inputs, I'm using an optocoupler with the following circuit: The jungle IC, however, requires a 4.5Vpp signal on the chroma line: Is ...
- 1,253
0 votes
2 answers
225 views
WHY does the LED turn on SLOWLY?
TL;DR ver: LED light controlled with Arduino lights up during an interval of 2 frames, not one in a video footage of 30 FPS. It slowly turns on... but why? ===== I have a (mouse) behavioral experiment ...
- 103
4 votes
3 answers
849 views
Optocoupler as a switch for composite video sources
I want to switch between 2 video sources (cameras) to a common video receiver. Is general purpose optocoupler suitable for that? Here is the schematics: In more details, the video switch is ...
- 275