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Questions tagged [video]

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

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0answers
13 views

How can I use USB C for charge and video out? (power to a 18650 cell CMB and video out) [on hold]

I have a Wii portable and want to make it charge off USB-C, but also have the option for video out in the same port. This would be similar to how the Nintendo Switch docks with charge/video. I don't ...
0
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1answer
25 views

Why would sdi to hdmi work, but not when I convert sdi to hdmi to dvi [on hold]

I am transmitting video over sdi and converting from sdi to hdmi with an aja Hi5. This works, but if I convert that hdmi output into dvi, the output is either not detected, or constantly connects and ...
0
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1answer
35 views

Filter power supply for video signals

I'm drawing a board with an MCU (running at 32 MHz), some serials and an analog video section (mux and amplifiers). I kept the video section physically separated from the digital one: i.e. it's placed ...
12
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1answer
182 views

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 ...
0
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1answer
39 views

Composite Video Driver Design - PAL

In the effort to understand early computers (systems revolving around the 6502 CPU). I have started studying their makeup, while the operation of the CPU & memory makes sense. I'm left stuck and ...
0
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2answers
74 views

Is there equalizer on the monitor's HD-SDI interface

Is there usually an equalizer on the monitor's HD-SDI input interface? In fact is it an requirement for HD-SDI monitors? Maybe HD-SDI signal is attenuated too much at the input of monitor, but ...
2
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0answers
74 views

Advice on upgrading a circuit design for s-video

I'd need some advice on a circuit, which generates analog video (s-video) from composite and Chroma (a mod inside an old Sinclair Spectrum computer). I haven't designed the circuit myself, but I ...
1
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1answer
134 views

Video sync generator IC

I have a board which is a PAL CCIR video sync generator card having SAA1043. The IC is accepting external sync signal from pin 15 and generating composite pulse on pin 26 and burst output on pin 1. ...
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0answers
38 views

Light illumination method for video camera and CV detection

My control application implements human face detection and recognition with using of CV library. My device uses usual VGA USB video camera. Problem: Good and uniform light illumination allows ...
0
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0answers
34 views

CXA1645 replacement - most convenient switching between PAL and NTSC

I have built NTSC encoder using CXA1645, and picture through composite out is great. Now I want to extend it to PAL, because output device encoder is attached to can operate in both modes, changing ...
0
votes
1answer
83 views

How can I attenuate a video signal in discrete steps using digital control? [closed]

I would like to use a μController to adjust the brightness of VGA/EGA RGB signal. My intention is to allow for a setting from "full brightness" (0% attenuation) to "completely dark/black" (whatever ...
0
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4answers
62 views

Video Protocol Without Required Speed

I am trying to output a video signal with a slow microcontroller (Arduino). I don't need anything fancy like HD or 30fps, and if it takes a second to update the frame that is fine. I was looking for ...
0
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1answer
90 views

HDMI to CSI Converter for raspberry pi [closed]

I am creating a HDMI to CSI converter, but i dont know if the wiring is correct and if i need to add any passive component. can you guys help me out? EasyEDA Project
0
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1answer
96 views

Are horizontal and vertical back porches required for digital video, and if so, why?

The necessity of vertical and horizontal front and back porches in analog video seem fairly intuitive to me, but why are they necessary for digital video at all? In this LCD module data sheet and this ...
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votes
1answer
76 views

How to emit infrared radiation online without configuring the monitor/hardware?

I wish to make a video streaming application where infrared radiations are emitted out of the display so that if someone tries to record the video through a camera, all they see is a white light and ...
-2
votes
1answer
74 views

I have miss-sync PAL frames (pictures inside)

In some cases I get this picture: And sometimes I get that picture: analogue camera -> TVP5150AM1 -[external sync discrete VSYNC|HSYNC]-> STM32H7_DCMI I could correct the second picture with offset ...
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2answers
96 views

Why do I Have 800 pixels in PAL video line

I have a DCMI peripheral (STM32H7) that receives video data from TVP5150 with discrete VSYNC/HSYNC. I have 306 (it should be 305, but there is a chance that this is because of the way I count number ...
1
vote
1answer
77 views

How can I determine a resolution of 4:2:2 YCbCr image?

I fetch data from 420 TVL camera, and now I just want to see this image, the only thing I need is resolution to draw it on my screen. How can I determine this? BWP M420MD -- camera, I'm getting DCMI ...
0
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1answer
34 views

During DC restoration of a video signal how is the first sync pulse detected?

DC restoration of an AC coupled video signal can be performed by clamping to some reference voltage, during the horizontal sync periods of the video. This all seems fine in a running system, when the ...
1
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2answers
53 views

What is image and video signal ?

Signal is something that carries information. Usually, something is a pattern of variations of physical quantity that can be manipulated, stored, or transmitted by a physical processes. I am wondering ...
0
votes
1answer
159 views

Can we use ethernet cable instead of coaxial cable without adaptors.?

I am a mechanical engineer. Trying to build a computer vision system using endoscopic camera. I have a camera with 4 pin input, 2 input pins for power supply of 5 volt and 2 input pins for video ...
0
votes
1answer
192 views

What does a TV receiver circuit look like? [closed]

I found a few circuits for TV transmitters, but no receivers. I've looked at other simpler RF transmitters and receiver, but it's not obvious to me how to reverse the circuit that I have. I want ...
1
vote
2answers
164 views

What is the best way to track IR led?

I want to build an interactive whiteboard which uses an infrared ped. I want to use a camera to track IR position on the projection screen. I plan to keep the camera a little further away from the ...
1
vote
1answer
101 views

Simplest display for homemade 8080 based computer-what to use? [closed]

I'm designing a 8080 processor based computer and I want it to be able to at least output something visually. I have thought about using SMD LED matrix made by myself, but even with the 160 x 120 px ...
1
vote
1answer
163 views

Sync Pulse generator for Composite Video. (Stabilizing video)

I am trying to make a Composite Video Sync Pulse generator with the Help of a micro Controller STM32 , Short story. I have a wireless video source that is transmitted from a VTX So there is a PAL ...
3
votes
1answer
85 views

What should I do to unused input parts/features (analog and digital input pins, and power pins) of a video scaler chip?

I am working on a video scaler chip which has multiple inputs (i.e HDMI, DP, VGA) but I only want to use the VGA input. (Choosing another chip with only one input is not an option). The friendly ...
0
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2answers
58 views

Help to identify Video Amp IC - 4 channel used for Analogue RGB video buffer

Way back some 10 yrs ago I used a Chip for RGB video buffer amplifier.it only provided some 3dB gain. It required no external components , had 4 internal video amplifiers in a 14 pin dil package. I ...
-1
votes
1answer
32 views

Timing signals in ITU656

I am working on a ITU656 Encoder Am I correct in saying that in the FF 00 XY timing signal, in which XY is made up up 1FVHPPPP (P are protection bits), that the V bit, which signifies field blanking,...
0
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2answers
91 views

How sensitive are the DVI sync signals?

We're trying to output a full mono-colored screen signal in 640x480 resolution over DVI to a Samsung monitor from an FPGA board. The problem we have is that we don't get any picture showing, instead ...
2
votes
1answer
343 views

How to switch composite video signal inputs to one output

what I want to do To switch composite video signal inputs to one output. conditions 4 inputs to 1 output all inputs and output are composite video signals with RCA connectors 12VDC used for power ...
0
votes
1answer
80 views

Power over coax standard

We are specifying a system to use power over coaxial cable, that will transmit SDI video. Is there any standard (IEEE or otherwise) for implementing it?
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0answers
139 views

How is vertical sync done in YPbPr component video

All the literature I have read about YPbPr component discusses only the horizontal sync, but I have not found anything about vertical sync.
2
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1answer
129 views

Retro computers and “jail bars” on the screen [closed]

I have tried to eliminate "jail bars" on the screen after UHF mod to video out (based on that: http://zx81stuff.org.uk/zx81/ts1500_video.html) by adding 460uf 16V capacitor between +5V and GND but it ...
4
votes
2answers
241 views

Can this old portable CRT TV connect to a RPi?

I'm a scrapper and hacker of vintage electronics. I found this wacky old portable TV with a small B&W screen and I really love the look of it. I want to feed it video (or something) from a ...
1
vote
1answer
164 views

Vivado Video IPs not working as expected

I've been trying to understand how to utilize AXI-Stream IPs for Video processing and display via VGA for a few days now, but can't seem to get any circuit to work. Here is a test circuit I created: ...
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0answers
78 views

4-layer video experimenter's board layout, critique sought

This is a layout for an ADV7184 video DAC, connected to an ADV7341 video encoder. The intention is to allow a microcontroller such as an Arduino or STM32 to generate text and graphics over the video ...
0
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1answer
80 views

RGB888 to RGB565 pins for an AL250

I'm trying to design a circuit which takes an RGB888 signal from another board and deinterlaces/scan doubles using the Averlogic AL250 to send to an RTD2660H. The AL250 "only accepts RGB565" but it ...
0
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1answer
52 views

How to enable auto detect AV inputs using dummy signal instead of actual video?

I got a TV with a cracked screen that otherwise works fine, which I managed to change the inputs to "AV" (3 RCA jacks). So I amputated the screen and now have a mini stereo with remote. The only ...
1
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1answer
574 views

Resistor DAC and buffer for VGA output

I'm in the process of designing a very simple binary weighted resistor DAC for an output stage of a RGB VGA driver. There will be 3 bits for R and G components and 2 for B. The output signal is analog ...
-3
votes
1answer
128 views

Is it safe to watch a video/picture of class 4 laser? [closed]

Was wondering because I heard they were very dangerous even if not looked at directly. Wonder if looking at a picture or video can harm eyes may sound like a will question but it's always good to be ...
0
votes
2answers
318 views

Video compression using low power processor

I'm trying to build a hand held camera with video recording feature. Basic features of camera are Resolution: 640x480 Frame rate: 25/30Hz Video format from sensor: 8-bit grey scale BT.656 (Sensor ...
0
votes
1answer
63 views

How to transfer raw video data from a device to a computer using royalty free wired connection?

I have RGB video data captured from an LCD and I would like to send it over to a computer for capturing however it seems all video connectors require a significant investment if one intends to use ...
7
votes
3answers
1k views

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 ...
0
votes
2answers
135 views

Video scaling vs Display scaling

I am going to start a project in FPGA and "graphical screen" scaling. I am still in the "reading-the-material-phase". Are there any differences between video-scaling and display(e.g. Windows Desktop)-...
0
votes
1answer
43 views

SI tools for SDI video signals [closed]

I am designing a board with high speed HD-SDI signals. The data is single ended HD-SDI. There are circuits which convert it into differential HD-SDI followed by another circuit that converts it into ...
-1
votes
1answer
50 views

Why there is difference between image size and video resolution of a specific camera? [closed]

I was searching to buy a camera, but I saw in specs they wrote: 2MP(full hd) video recording 5MP image size Why the vido size is 2MP but image size is 5MP? How ...
1
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0answers
237 views

SD card both photo/video recording and data logging [closed]

How can I capture photos and videos (JPEG and MPEG4 respectively) taken from an NTSC camera to an SD card and also log text data to it? I am working on a project in which I need to log analog data ...
0
votes
1answer
59 views

How video page flipping works

I'm working with Page Flipping and Tiled Rendering (all hardware based) but i cannot understand one aspect of page flipping technique. When you're at frame 1, you're rendering bank1 and working on ...
0
votes
2answers
138 views

Trigger digital interrupt on negative voltage

For a little project of mine (FPV OSD for Quadcopter Camera) I need to detect every time the signal voltage goes negative. The Signal I get is NTSC. Here each line sync is marked by the voltage going ...
0
votes
2answers
750 views

How to convert S-video to YPbPr?

I want to connect devices which output S-video (Y/C) to my TV, which only has YPbPr component inputs. One of them outputs PAL (European) while the other outputs PAL-M. One way to do this would be to ...