Questions tagged [hdmi]

HDMI (High-Definition Multimedia Interface) is a digital audio/video interface.

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HDMI: Can a computer still detect a monitor properly if some of the TDMS pins/wires are damaged? [closed]

Can a faulty HDMI-cable with damaged TDMS pins/wires still work to the extent that the computer can still detect the monitor, but the monitor just will not display anything (except for no signal)?
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Lattice ECP5UM5G: receiving TMDS signal with the FGPA tranceivers

I'm trying to implement a DVI/HDMI receiver in the Lattice ECP5UM5G FPGA. This FPGA has four 5 Gb/s transceivers, that seems to be more than enough for high-resolution HDMI video. Unfortunately, the ...
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What is is the maximum number of consecutive zeros/ones in a TMDS-encoded bitstream?

If I understand correctly, TMDS is similar to the 8b/10b encoding. A compliant 8b/10b encoder will not output more than five ones or zeros in a row, but does a similar property holds true for TMDS?
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How can I fake HDMI signal? [closed]

Is it possible to build a circuit to send power to an hdmi-in port on a repurposed tv power/logic board to make the “unit/logic board” see it as a signal and not turn off? I’m making a video key light ...
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How can I drive an LP101WX2 LCD panel with the Chalkboard Electronics HDMI-dualLDVDS converter?

I am trying to drive an LP101WX2 panel with the Chalkboard Electronics HDMI-dualLDVDS converter but all I am getting is a black screen. I tried to flash the board's firmware with both the demo and the ...
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HDMI connector power port

I am designing an HDMI switch with two inputs and one output. I found a multiplexer that can be used specifically for this purpose (HD3SS215) but it needs a 3.3 V power supply. Can I use the 5 V power ...
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Turn screen on/off with an N-channel MOSFET

I have a display monitor that is connected to a Raspberry Pi, all running off a battery. Most of the time the monitor is not used so I'd like to turn it on only when required, but I also would like it ...
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Minimum set of pins to block HDMI

I am trying to build a device to block HDMI signal (from receiver perspective, i.e. the TV) and I was wondering if there is a minimum number of pins (ideally one) that I can use to accomplish such a ...
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Looking for an explanation of grounding in relation to computers and DVI-HDMI adapters

I recently found that a DVI-HDMI adapter, purchased to connect the micro-HDMI port on my new Raspberry Pi 400 to the DVI port on my monitor, behaves strangely: it works well when connecting to my ATX ...
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HDMI Type E pinout

I am looking for the pin out of the HDMI Type-E connector? It is surprisingly hard to find and as far as I know the pins 1-19 are not the same as Type-A. What is the pin out of HDMI Type-E?
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Is there such thing as a TMDS decoder IC or device?

I am interested in measuring audio latency of an HDMI sink device (DUT). I have an 8K Murideo Seven Generator, but I believe that its audio latency measurements may be off by 15 or 20 ms, so I would ...
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Why did a spark occur between my HDMI cable and metal lamp base?

Edit: Update 1/2/22 @ 2:27 UTC: outlet tester shows that all outlets and power strip outlets being used were normal. Update 1/2/22 @ 21:07 UTC: performed various continuity tests which suggest to me ...
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How to connect Mini LVDS to standard LVDS or HDMI?

I've purchased a LCD TFT Display (LG Display LA123WF-SL01) that has an absurd connecter that i haven't seen anywhere online that it has been used before. The name of the connector is FH28D-64S-0.5SH. ...
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1 answer
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Can one have ethernet connection through laptop's HDMI port?

Recently, I was trying to get a laptop (that had no ethernet port) connected to an ethernet device. The device communicates via HTTP, and the laptop had Windows OS. The device manufacturer's tech ...
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Wiring of HDMI Extender

I'm trying to work on a HDMI extender The purpose is to single out the DDC lines so I can set the default display mode. (plug the male connector into the monitor and the hdmi cable from my laptop into ...
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Strange PWM on HDMI CEC pin [A: It was a broken wire]

I hit a problem designing HDMI CEC device: I connect logic analyzer to TV with plug like this: When I connect to my TV with HDMI, on CEC pin I see constant PWM. When I press buttons on remote, I see ...
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HDMI or DisplayPort through USB-C?

I want to get video output through USB-C from Raspberry Compute Module 4. I can get HDMI output from Rasp CM4, but I am not sure that HDMI Alt Mode works fine on USB-C (and I can't find hardware to ...
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HDMI green signal not working as intended

I have been working on a host PCB for the Raspberry Pi CM4, and wanted to add some HDMI output. The beauty of the CM4 is that you don't need any further chips, just some current limiting chips on the ...
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Where to find datasheet for male/plug HDMI connectors?

Okay I know this might sound like a silly question.... But I CANNOT find these on Digi-Key or Mouser. Am I just stupid and searching for the wrong thing? Almost all websites sell the receptacle...I ...
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Synchronize IR sensor output and HDMI (FPGA)

I'm having problems when trying to synchronize output from IR camera and hdmi transmitter. I use cyclone FPGA and ulis IR sensor, for describing how I use Verilog. Sensor frame rate is 60 fps, same ...
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Impedance Matching Necessary for short HDMI trace?

So, I am working on a design that uses HDMI for media output. The PCB has a connector for the Raspberry Pi CM4, and usually what I would do, is to do a "differential pair route" where I do a ...
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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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Current from HDMI cable [closed]

I recently purchased a cheap monitor from amazon for using with my laptop. It has a HDMI and VGA output. I also have a speaker connected to my laptop. when I connect the HDMI cable to my laptop my ...
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What logic analyzer specifications are needed to inspect HDMI 720p 60 Hz?

I would like to inspect the audio data islands of a 1280x720 progressive scan 60 Hz HDMI signal. I simply want to view these data islands to see exactly when audio data begins to be transported in the ...
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two hdmi cables with different resolutions [closed]

I'm using hdmi cable to connect my raspberry pi 4 to an ips display of 800X480. when I use one cable, it display one type of resolution, but when I use other cable, it display different type of ...
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Pull-Up resistor for a 74LVC1G06 Inverter

As part of dual mode display port design, Pin13 goes to 74LVC1G06 inverter input (see U89): in case where I want to choose only HDMI I need to connect a pull-up to DP_0_PIN13. from wikipedia : "...
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Decoding HDMI TMDS data

I am trying to build a hardware based ambilight using an FPGA, mostly for fun/learning. I have a copy of the HDMI 2.0 spec, and I’ve identified some issues I’m hoping someone here can help me solve. ...
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EJ030NA-05B to hdmi

I recovered a printer display that seems to belong to the same family as EJ030NA-01B but I am unable to find the exact datasheet and the connector is way to tiny to match a 40 pin to HDMI converting ...
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HDMI to SPDIF (audio extraction from HDMI) [closed]

Is it possible to extract SPDIF signal from HDMI port without any chip? I want to extract digital audio signal from HDMI port and then route it to DAC. (comment added to question) I'm searching for a ...
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Where can I find information on interfacing an MCU with an HDMI display? [closed]

I am just starting the process of creating a product that will have an HDMI display (not chosen), but I don't quite know where to start. I have never delved into the realm of Displays, and don't know ...
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HDMI Simulate unplugging with Microcontroller

I want to interrupt an HDMI Connection with an ESP in a project of mine. I have read in some posts (eg. Can an AND gate be used to toggle an HDMI connection?), that you can simulate an unplugging ...
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What wires are optional in HDMI?

The 2009 Hyundai Genesis has a combo CD player / stereo / Navigation / car information system. It has an LCD panel that displays information from this system but I'd like to get it working with a ...
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Extract information from video through HDMI

I need to develop a device that does the following: Take an HDMI input For each frame, extract a small region of the screen. It's a small rectangle containing numerical digits that are constantly ...
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HDMI cable lost colors [closed]

I accidentally bent one plug on one side of an HDMI cable and, after taking the plug apart and straightening everything out as much as possible (after which the only apparent structural oddity is that ...
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does the order at which HDMI differential signals should be connected matter?

I have 8 DDI (Digital Display Interface) signals that come out of the CPU with a certain numbering from 0 to 3. I want to connect these signals to HDMI connector. I was wondering if there is an ...
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Separating power from data micro USB to HDMI

I have a camera which both draws power and sends its data through a battery pack to a custom monitor. The monitor also draws power as well as receives the camera data through the battery pack. (Both ...
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How to interface TMDS signal with optical tranceivers at low cost?

Not like this which is about protocol, this is about physical. The HDMI2.0 (18Gbps) fiber optic HDMI cables on market seems to be "cheap", like<$100. Although optic fibers are very cheap ...
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HDMI for Jetson Nano contradictions in guides

For my drone, I want to develop a custom Jetson carrier board with minimal required interfaces. For quick debugging, I would like to add an HDMI port on the PCB. However, I’m not familiar with HDMI ...
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How to make a HDMI signal be identified as HDMI instead of DVI?

I am experimenting with the HDMI port of an ULX3S FPGA board. I have been able to properly generate DVI signals with a resolution of 800x600 and framerate of 60 Hz. I am now trying generate actual ...
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2 answers
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Adding HDMI To A USB Type-C Hub Design

I've been working on this design for a client for a little while now. I can't go into full specifics on it but the basic design is a USB hub. The IC I picked at the time met the design requirements ...
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2 answers
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Can an HDMI input marked "ARC" be used for ordinary video? [closed]

If a television has one of its HDMI inputs marked "ARC" can I use that input for regular video input?
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Car Head Unit LCD LVDS to HDMI

I've recently picked up a head unit for my car and I am trying to get a HDMI signal to it. I've taken it apart and had a look at the hardware, and it seems to be using a single ribbon cable to drive ...
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HDMI color correction using Arduino or other device. Is this possible?

I have a laptop display that does not come with color correction software available. I'm currently using it as a monitor to play some PS4 games on it but there are some problems with colors. I ...
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What is the best method to transmit a DVI-D video signal from a FPGA?

I need to transmit a video signal from a FPGA. It will be better if this signal is some kind of standard protocol like DVI-D. There is an article that proposes to use LVDS transmitters for TMDS lines. ...
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How can you split HDMI 1.4b control signals to two displays?

I have been tasked to implement an HDMI splitter on a PCB along with other interface connections. The intent would be to utilize one built in display and have the option of a second plug-in display ...
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1 answer
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Why did a hot/neutral reverse lead to an HDMI cable shocking me?

I recently set up a new TV/home theater system for my dad. The TV had 3 HDMI devices plugged into it. I plugged a 4th HDMI cable into the TV, and as I reached for the opposite end of the cable with ...
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Any physical barrier to read an HDMI input?

I'm considering coding a software that would read data sent from a device (game console, computer, ...) via HDMI. The program would then be able to display the shared content inside a window, which ...
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Best cable to carry 3 DP (differential pairs), power, ground and 4 signals

i need to carry the signals from a Raspberry compute module to a camera module and vice versa. Since I need to place the camera around 4 foot away from the microComputer, and i want the connection to ...
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Why is retimer circuit provided for HDMI TX lines?

I am exploring a Zynq ultrascale+MPSoC design. While looking at the reference design of XCZU9FFVB1156 SOC evaluation board, in the HDMI interface there is a retimer IC in the transmitter side of Bank ...
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3 answers
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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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