Questions tagged [video]

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

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31 views

Video card posts (displays video output) only on cold boot, want to make a mini project to learn how to test and diagnose gpu [closed]

Extra time on my hands because of covid, want to learn and hopefully fix my old 980ti as well. I'm hoping somebody can post a link to a forum post with somebody doing something similar, or any ...
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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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Suggestion on filtring video PAL signal currepted by signal type converter device

I have a PAL video signal coming from a video source (an old system that we have) into some kind of transmitter-receiver pair devices that convert the signal into another form of signal to transmit ...
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26 views

Switch video sync signal using transistor

I have a circuit that currently outputs either a high or low signal from a pin on a PIC microcontroller. This part is working as expected. I now want to take that high / low signal and use it to ...
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23 views

Origional Xbox AV Cable With A White Tip [closed]

Let me begin with my setup. I use this AV box, don't remember its exact name, for all of my consoles. It works well on my Vizio flat screen TV. But then I hooked up our original Xbox today and it ...
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25 views

Level A and Level B for 12G SDI Interface

The 3G SDI has three different mapping schemes for transporting uncompressed video. These are defined as Level A and Level B channel mapping. Does 12G SDI has similar kind of channel mapping?
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1answer
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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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55 views

Diagram/PCB functionality explained

I have a diagram that I've recreated from a PCB by studying it's trace routing and what components are in use. Limited to what was listed on the components themselves, I believe I have gotten most of ...
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1answer
92 views

Analog video chrominance decoding - PAL/NTSC

I'm implementing an analog video decoder on FPGA. I find some difficulties during chrominance decoding. I appreciate if you can help me. These are the steps as I'm doing: I generate an NTSC ColorBar ...
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47 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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45 views

Composite video from rear car camera - bad signal (wrong levels?)

I have bought a car radio (AMPrime 4022D) that has ability to connect rear camera to it, so you can see the image on its screen. The problem is that radio doesn't detect the signal (blue screen). But ...
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103 views

8 bit PC integrated with VGA video card (similar to ben eater project)

I'm thinking about making a project like this one and add a graphics card like that one. Using an EEPROM for the video memory and changing its content setting it in write mode and assigning a value ...
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3answers
159 views

Merging two different HDMI cables

I have two brands of broken HDMI cables that I need to join to make them longer. Can't join them by color, because they are completely different. Plus, one of the cables has all the wires, the other ...
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1answer
43 views

HDMI Video to RCA Audio [closed]

Some 20 years ago I created an audiovisual art installation, connecting RCA Video output from a TV set to a HiFi system's audio-in, just plain via cable, in order to "hear" the video signal. ...
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1answer
69 views

Texas Instruments fully differential op amp app note: I'm having difficulty understanding an equation (single ended to differential video conversion)

I am developing a circuit to convert single-ended video to differential, based around the TI article "Converting single-ended video to differential video in single-supply systems" by Jim ...
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1answer
43 views

Difference between LVDS SerDes and FPD-Link III SerDes?

I'm new to the world of video interfaces and am working on a project in which parallelized video stream data is transmitted and subsequently received by processing components on the other end of an ...
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26 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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53 views

Connect an I2C camera to computer via USB as a webcam

I took out of an old security camera its circuitry and I am trying to figure out a way to connect it via USB to my computer and use it as a standard webcam. Is it possible? Here are the front and the ...
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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 ...
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1answer
60 views

Are the Front- and Back-Porches Required to be Black for VGA?

My first question for this project was how to process a fast analog signal in the first place: Digitally-Controlled Analog Processing for VGA Video Signal? This one is about a specific detail of that ...
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3answers
159 views

Will an RF modulator provide NTSC System M spec video from a DVD player?

I've been attempting to recreate the effect of an old NTSC television broadcast lately with the use of DVDs. The DVD-Video spec allows for up to 720 x 480 pixels at a display rate of 29.97 frames per ...
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31 views

Stereo Vision on Raspberry Pi using CSI MUXing

I've been researching this topic for a while and have finally come up with something but I'm looking for advice and I have a couple of questions. The end goal is to put this on a drone and receive ...
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2answers
68 views

How can I build a composite video to scart converter?

I'm interested in building a composite to scart adapter. How can I?
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1answer
102 views

VGA to Composite conversion cable

I'm not able to obtain an adapter from local markets for vga to composite video output. Found a circuit [VGA to composite circuit. Does it work?] that claims to work. I didn't had a vga cable so I ...
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34 views

What display interfaces do automotive screens use?

For example the screens inside tesla cars, I first think of HDMI, many high end embedded processor boards come with HDMI outputs, but is this connector found in actual mass production or industrial ...
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1answer
60 views

Digitally-Controlled Analog Processing for VGA Video Signal?

A few months ago, I replaced the dead fluorescent backlight of an LCD computer monitor with an 8-bit-per-channel RGB LED strip, and built a controller for it from an AVR microcontroller that talks to ...
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46 views

Can anyone help me find a connector for this?

I'm having trouble identifying this connector https://imgur.com/gallery/6M3bkJJ I'm trying to find the connector to it so I can connect the 5 wires for video. This board is part of a arcade machine.
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196 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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43 views

Best wire gauge for an RGB video signal

I'm trying to wire a CVBS-to-RGB converter into my car's monitor that only supports Navigation Maps with an old-fashioned ...
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1answer
191 views

Explain how this CCTV video balun actually works?

I am trying to reverse engineer this video balun. It is meant to convert a 100~120 balanced video signal on twisted pair to a 75ohm unbalanced signal. I've removed it from it's housing, but normally ...
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1answer
76 views

Is it possible for an HDMI cable to be “worn in”?

I have an HDMI cable running thirty feet between my computer and a TV. I've had various problems with the screen flashing, stuttering, etcetera, due to the signal not being strong enough to carry a 4K ...
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1answer
79 views

Replacement NTSC colorburst crystal won't oscillate

First of all, an honest warning - I am a brave (and stubborn) idiot, and a self-taught idiot to boot. I know my way around the basics and have repaired some non-trivial circuits (various complex acid-...
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83 views

What sort of filter is in this old TI application note?

I'm trying to analyze a circuit from the ~40 year old TI TMS9928/29 Interface to Color Monitors application note. It shows how to convert the (almost) Component video straight from the graphics chip ...
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1answer
32 views

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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1answer
92 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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2answers
66 views

How can different voltages produce the same short circuit current?

I hope I’m not just thinking past something trivial but I can’t make sense of this. In this video, https://m.youtube.com/watch?v=XDf2nhfxVzg , variable voltages from .1-20V are used and when he shorts ...
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49 views

What's the best way to terminate an unconnected composite video cable from a “pass-through” monitor output?

I have a Sony PVM-9045Q¹ video monitor with composite video inputs that have a "loop-through" output for each input. The outputs are described as "75 ohms terminated (75 ohms automatic termination)," ...
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7k views

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 ...
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1answer
48 views

Do I have match impedance while routing PAL video tracks?

I am designing a PCB with PAL video output. PCB contains 50ohm and 100 ohm traces. The connection between RF coax connector is very close. So 75 ohm traces are 80 micron for my stack-up. I am confused ...
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2answers
84 views

Hardware composite video overlay

I am building a setup to make more inputs on a composite monitor (in fact it's a VGA monitor with a composite-to-VGA converter on it but the overlay needs to be composite) and everything will be ...
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1answer
44 views

Purpose of divide-by-2 (or CLK/2) on a video pixel clock generator ICs

I've been looking into some video clock generator chips and almost all of them have a divide-by-2 or CLK/2 output pin (in addition to the normal CLK out). What would be the purpose or application for ...
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LA72910V Demodulator and Modulator Noise Problem

The project includes a DC power supply that supplies two cards and provides a network. The video signal is modulated through LA72910V whether a card is demodulated in the other card. There is no ...
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2answers
107 views
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70 views

PAL termination problem?

I have a circuit like this. Input of circuit is PAL signal. Output of circuit whose AC coupled version. Input Output But HSYNC part in the output looks like mirrored. It should be more negative ...
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1answer
371 views

8-bit VGA DAC Design Question

I am being driven up the wall with designing an 8-bit VGA DAC for an embedded application. Everywhere I've researched highlights the necessity for "impedance matching" the 75 ohm termination ...
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2answers
126 views

Understanding PAL signal on PCB

I have a decoder circuit that includes TW9900 video decoder. The decoder doesn't work properly. There is a matching and AC coupling circuit on analog inputs of the decoder. To finding the problem, i ...
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56 views

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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2answers
169 views

Determining Blanking for HDMI Transmitter

I am working on a project which produces a video output over an HDMI connector. The driver I am using is the Texas Instruments TFP410PAP. The image I am attempting to display is WVGA, 800 x 480 ...
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1answer
96 views

Do front and back porches for digtal video really matter?

I am developing an LCD controller, and some of the code for my (third-party) timing generator includes horizontal and vertical front/back porch and vsync/hsync pulse time information for a different ...
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123 views

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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