Questions tagged [video]

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

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RGBHV (VGA) to YPbPr Converter and Waveforms?

Purely for hobby, I am working on an RGBHV (VGA) to YPbPr (Component) converter circuit for old games consoles modified to output RGBHV on a VGA cable. From the game consoles, the RGB signal is taken ...
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3 votes
0 answers
1k views

DIY Webcam (MIPI to USB)

I'm looking to purchase a webcam (or several) for live streaming since I'm stuck in my house for the indefinite future because of the coronavirus. However anything halfway decent is completely sold ...
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3 votes
1 answer
438 views

Connecting luma only output to composite input

In the course of troubleshooting this problem I reconnected RCA connector connected to the RCA input of my TV to the luma wire of AD725 in hope having precise and beautiful grayscale picture, but got ...
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2 votes
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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 ...
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2 votes
0 answers
5k views

VGA Timing - Sync & Porch Positions - FPGA

I've been programming a VGA Module in verilog, and have spent some time fighting with my monitor to display some test colours. When referencing VGA timing diagrams online, it seems many are similar ...
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TVP5150 output 0x80,0x10 and input video signal not locked

This is my first question, I hope everything is ok :) I have been struggling with a problem for a while now. I have a PAL camera (from which I barely have any information) connected to a TVP5150AM1 IC ...
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1 vote
3 answers
79 views

Use SFP modules for HDMI or Dp TMDS line

I just wonder if it's possibile to take four SFP modules and connect them dirrectly to TMDS lines of HDMI output and send such signal via four fiber to other similar end? Is it doable?
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Composite video signal detection problem?

I have an android headunit and I installed a reversing camera to it. The problem is that the headunit does not seem to detect the camera signal if the environment is too bright. It just shows black ...
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AD725 luma trap implementation

This question is related to my issues implementing luma trap on my bread board when it appeared that I get better results through composite output by disconnecting luma trap circuit at all. However ...
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1 vote
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DS90UB948-Q1 internal pattern generator

Does anyone have prior experience with DS90UB948-Q1 FPD-Link III Deserializer deserialiser from Texas Instruments ? I am trying to configure the internal pattern generator block sending I2C commands. ...
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How to convert arcade RGB video (2-5v p-p) to VGA (0-0.7v)?

I'm trying to convert arcade video signals (JAMMA) to VGA specifications. From what I've gathered, arcade video signals aren't standardized. They can range from 0v-2v or 0v-5v, etc. However, VGA ...
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Shift composite image right

The circuit is based on AD725 encoder, and the proto board is functioning relatively well. Here're the pics: NTSC mode: PAL mode: Circuit detects PAL or NTSC mode using MCU, and performs automatic ...
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1 vote
1 answer
476 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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209 views

Designing a DVI/DP to VGA converter/converting 16bit bus to 8bit bus at 2x the frequency

as it turns out, new video cards no longer have analog video output. There are multiple converters available for sale, but I have not found one that can do higher resolution than 1080p at a refresh ...
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1 vote
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224 views

Composite video out from 74AHCxx gates with 16MHz clock. Insane?

just for fun and while waiting for other components to arrive I want to build a composite video out from available hardware. So please no suggestions to just by a propeller. Available hardware: ...
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1 vote
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2k views

Convert SOG to VGA using LM1881

I need to convert RGsB (aka SOG or Sync On Green) to VGA. I've built the circuit as shown below: The circuit works but the output picture looks quite striped, something like this image: Any help in ...
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1 vote
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261 views

RGB Cable Assignments - help

I have a video cable D-Sub 9 pin. Someone know the connector pin assignments to do a RGB 3 bnc cable? Someone can help me? Below, the image of description of the cable
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1 vote
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254 views

Video streaming from image processor

The project I'm working on involves streaming video from an image sensor to an LCD, preferably as cheaply as possible. My question is: can I get an image processor/sensor SOC (a la https://www.aptina....
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Non-Uniformity Correction NUC system ZYNQ FPGA

I am trying to implement the scene-based non-uniformity correction NUC of Infrared Focal Plane Array on ZC706 Evaluation Kit. I understand the algorithm and what should I do, but I don't really ...
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FPV interfacing with Arduino boards

I have been trying to interface a Run Cam Nano 3 with Arduino Nano to read the video data. There are 3 pins to the camera, a 5V pin, a GND pin and a video pin. I have been trying to analogRead from ...
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60 views

Sync stripper circuit for RGsB to RGBHV converter

Currently, I have a RGsB signal source, ISL59885 sync separator and RGBHV monitor. Green is the same on the input and output connector (meaning, sync-on-green, not the perfect clean green signal). ...
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How to convert composite AV signal or RGB to luma (grayscale)?

As the title says- how can you convert composite signal into luma?? As we all know, composite is just what it says, composite video with grayscale and color signal combined and luma is just grayscale. ...
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80 views

TMDS Chip fails but Direct Connection to FPGA works

We've been attempting to do some graphics over HDMI using an FPGA. I've built a board that has two HDMI connections. One of these links the required video lines directly to the FPGA. The second HDMI ...
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43 views

Does it take more power (battery-life) to stream video or to do local video processing?

I have a raspberry pi with a camera. I want to take analytics from the video (mostly object detection). This doesn't have to be run in real time and the RPI doesn't need the output of the video ...
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46 views

Where to start designing a ~1Hz to ~60Hz square wave oscillator as a switch for a Klomp dirty video mixer?

So I built this circuit and in messing around with it I found if I switched quickly between a camera (feedback) source and a video source in quick succession with the switch I obtained an ...
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242 views

How to simulate a composite video input signal in ltspice

I want to simulate this video driver circuit (i think it's called that) in ltspice I found this design from this very nice video: https://www.youtube.com/watch?v=lqSiMKwfZsY by the videolabguy. To ...
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65 views

How can a ground loop cause a OSD to flicker / dissapear without affecting the rest of the video?

I don't know if it is best to ask this question here, or on drones.stackexchange.com, but I think that I am more likely to get a good answer here even if i might have to provide a bit more background. ...
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32 views

How can I gate the output of this phase detector?

I want to make a PLL which will lock to the subcarrier of a composite video signal during colourburst. The colourburst is present for about 2.25uS of each scanline which is 64uS long. So during that 2....
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1 answer
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Finding an analog switch IC (BBM & SPDT) for video signal

I'm looking for a SPDT analog switch IC with Break-before-make to switch between video signals. However, the amount of options available leaves me overwhelmed with no clear option in sight. I've ...
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0 votes
1 answer
101 views

I want to make a photo-trap for wildlife

I want to make a photo-trap with extra features. I tried using a Raspberry Pi for this, but I could not start the system in under 4 seconds. When other photo-traps detect motion, they start ...
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1 answer
127 views

Choosing capacitors for AD725 encoder

This question generally applies to many situations, but in this case I am trying to figure out the best choice (no limit to the perfection). I am stuck at both input coupling capacitor and output ...
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2 answers
342 views

3 way selector switch to Push Button switch

I have 3 way video switcher which uses selector switch, is it possible to change this to momentary push button? Project - I want watch 3 video feed from camera over 1 screen, with this selector ...
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  • 101
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1 answer
640 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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0 answers
42 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 ...
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0 answers
559 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.
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0 answers
106 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 ...
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1 answer
56 views

Demux from 1 camera to 3 DVR's

Recently I have been experimenting on DVR devices. I have one camera however I want to demultiplex it to three 16ch DVR devices. I have been able to create a daisy chain to connect all 16 channels of ...
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-1 votes
1 answer
173 views

What is Level A and Level B in 3G SDI Interface

Can someone point me at a description of the difference between a 3G-Level A SDI signal and a 3G-Level B SDI signal.
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-1 votes
1 answer
43 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,...
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