Questions tagged [hdmi]

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

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110 views

Useless pins in HDMI cable?

In order to connect two small electrical circuits, I needed 17 pins. Because of its availability and compact form, I chose the HDMI connector. The two circuits are connected using an HDMI cable that ...
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45 views

HDMI switch design PCB

I was looking around but I cant seem to find much about how to make an HDMI switch, so eventually found TMDS361B which seems to be pretty easy to design and also can be controlled by 2 simple pins. ...
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1answer
50 views

HDMI/USB Powered Lighting

Alright so a little vague title but here it goes. I'm interested in powering some 5v LED strips with an HDMI cable. I have no idea if this is even possible, I'm lacking knowledge in electronics. My ...
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18 views

Indicating “image not displayed” from downstream via DP/HDMI/DVI

I'm trying to switch a video signal between different sources and, as a courtesy to the device generating the signal, would like to indicate that the image data is currently being thrown away so it ...
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1answer
41 views

Location for placing ESD components for UHD video

I am implementing ESD protection for HDMI video input. The HDMI video goes through a custom cable of ours, into a connector board attached to our enclosure, through an edge card connector, into our ...
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1answer
146 views

What are the minimum FPGA feature requirements for decoding and encoding 4k60 HDMI signal [closed]

I want to build a prototype device that manages to do the following: Take a HDMI signal with at least 4k resolution at 60fps (for simplicity without DHCP for now,) change a few pixels (say a red ...
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1answer
26 views

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

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 ...
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0answers
106 views

PCB HDMI high speed routing suggestions on my layout

I would like to get suggestions from all the high speed PCB layout experts on my PCB design. I have a board with HDMI transmitter IC whose output is going to HDMI switch IC. The switch IC also has ...
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1answer
114 views

HDMI Switcher for analogue audio? [closed]

I ordered a 5 to 1 HDMI Switcher with remote. I was looking for the lowest price way to switch analogue audio RCA/3.5mm stereo. At the time I ordered this my decision was based on the availability of ...
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2answers
332 views

How to achieve 100ohm impedance for HDMI differential pair on FR4?

I have a 6 layer FR4 PCB, and want to achieve 100ohm impedance on HDMI differential pairs. I am only using top and bottom layer for differential pairs, and following are my parameters: Trace width= 3....
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1answer
108 views

Treadmill causes nearby electronics glitch

I don't know if it is right place to ask, if not correct/guide me. I recently have built treadmill workstation, where I could walk and work (rather than just sitting). But as soon as I turn on ...
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1answer
159 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
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1answer
251 views

Problems wiring USB-C receptacle [closed]

(First, sorry for my English :_D) I'm doing a school project and I wanted to swap a male/plug USB-C to a USB-C female/receptacle. I thought it was just soldering the cables onto the board and it's ...
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2answers
1k views

How does an optical (toslink) to HDMI cable/converter work?

I'm looking at the small Sonos optical audio (toslink) -> HDMI cable in front of me and I don't know how it works (https://www.sonos.com/en/shop/optical-audio-adaptor.html). It has an optical audio ...
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0answers
87 views

How do passive boosters/repeaters (such as a HDMI 'booster') work?

I have a HDMI device and I want to connect it to something very far away. I notice you can buy a HDMI booster to do this, but some of them are unpowered (they take no external power). How can a signal ...
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10answers
12k views

Can a premium HDMI cable outperform a standard cable?

Assuming two cables both conform to the same standards (e.g. HDMI2.0, high-speed, ...) is it possible that a premium cable will outperform a standard cable when using an objective benchmark that ...
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0answers
42 views

HDMI active switch, no switching delay

I've been trying to connect 3 HDMI sources to one endpoint. When using analog muxes it takes about a second for the devices currently connected together to reinitialise communication after switch. ...
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1answer
67 views

Why would data transferred through an extension cable be different [closed]

This is something that has been bothering me especially when dealing with the latest cables made for DisplayPort or HDMI. I understand that issues can occur with adapters since you might be dealing ...
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2answers
509 views

What is the relationship between a 10:5 Gearbox and a 5:1 OSERDES2?

I'm trying to understand the HDMI implementation in Xilinx application note XAPP495. In especially, I don't understand the diagram below where there are connections between gearboxes and oserdes2. ...
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1answer
193 views

What is the difference between MCU and TTL screens? [closed]

I'm trying to build a HDMI decoder board for a 4in 480x800 IPS display. I found an HDMI decoder board on adafruit(https://www.adafruit.com/product/2218) which says it works for most 40pin TTL displays....
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1answer
106 views

What is the purpose of fifo in serialize of HDMI?

I'm trying to understand and study about HDMI. currently I'm referring with here (https://www.fpga4fun.com/HDMI.html). But I'm confused that why does that fifo need for higher resolution? in case of ...
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1answer
182 views

How do we know off-screen area in TV?

I'm trying to implement HDMI to FPGA and vice-versa. Currently I'm referring with https://www.fpga4fun.com/HDMI.html site. But I'm confused that "But video signals usually also have an "off-screen" ...
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1answer
237 views

HDMI Receiver Sense Logic and TMDS Capacitor Coupling

Does anybody know how is the "receiver sense" logic done? As the datasheet for Sil9612 4K video processor puts it in section 2.13.8 "receiver sense and hot plug detection": it is "by sensing the ...
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2answers
107 views

Do HDMI/DVI and DisplayPort transfer only differences or full frames?

Let's assume I have a static computer desktop on my external display that is attached by HDMI (or equivalently, it could be attached by DVI, as DVI and HDMI are compatible). The 60Hz picture doesn't ...
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1answer
67 views

HDMI Through Hole Layout Issues

So this is my first post so please forgive me but inform me if I'm breaking any forum rules. I'm trying to layout a through hole HDMI connector in Eagle. The issue I'm running into is that the gap ...
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0answers
143 views

What is the role of DE input of ADV7511 HDMI video controller?

I need to understand the data, DE, VSYNC, HSYNC and CLK inputs of ADV7511 video controller. I need them to program FPGA card (Xilinx Kintex KCU116) that has this video chip. FPGA manual says it uses ...
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1answer
40 views

FPGA Atlys Spartan 6 output predefined image or string through HDMI

I need help with displaying a short text on a hdmi display connected to the board (2 characters), I have already experimented with xapp495 but I still don't know how to do this. I understand that it ...
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1answer
128 views

Narrowing line of differential pair for DVI connector

Is this a big problem with reflections (caused by missing impedance) if I'll trace differential pairs like it showed on picture? I'm designing DVI driving on freq not more than 640 MHz. How you can ...
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1answer
434 views

HDMI triggering the Ground Fault Circuit Interrupters via Projector

Overview: A colleague of mine took her HP laptop from Canada (19.5 V, 1.4 A DC rated) to work in Brazil and experienced ground fault trips on the outlets when she connected an HDMI to a projector ...
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0answers
193 views

MIPI DSI Screen Misaligned

I'm currently trying to integrate a 4 Lanes MIPI DSI screen to an iMX6 custom board. As the iMX6 doesn't provide any 4 lanes MIPI output, I am outputting via HDMI and converting the signal through a ...
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0answers
112 views

Mini HDMI female - is one pin supposed to be shorter?

I have a Raspberry Pi Zero with Mini HDMI output. I acts kinda weirdly - it does work with a TV with HDMI input, but when plugged into a monitor with DVI input (with an appropriate HDMI>DVI cable) it ...
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2answers
507 views

HDMI (ADV7511) Output Design on Zynq zc702

I am relatively new to embedded systems, so please forgive my ignorance. I am attempting to build a hardware design in Vivado which supports console output on HDMI, using the Zynq ZC702 running ...
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2answers
1k views

FPGA - Injecting an overlay into an HDMI stream

I am looking to use an FPGA in line with a non-encrypted HDMI stream in order to inject an overlay to the display. The minimum resolution and frame rate I would like to support is 1080p at 60Hz. My ...
26
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1answer
5k views

Why must some HDMI repeaters know the cable length?

I just bought an HDMI repeater and had connectivity issues until I realized the repeater had to know the cable length. It has (1,2,4,8) dip switches that you have to use (binary coded) to set the ...
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1answer
84 views

HDMI Adaptor Board - Blank Screen [not working]

I have a Raspberry Pi and a custom HDMI screen board stacked as shown in the photo here. If I use a 'standard' HDMI lead then I have no problem. However, due to the form factor a lead does not suit ...
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1answer
209 views

HDMI clock negotiation

For a switching application I want to make two HDMI signals synchronized, is there a way to negotiate clock signals between an HDMI source and sink or two sources (preferably without taking devices ...
1
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1answer
36 views

External interrupts to MCU from ADV7511

I am having situation that when I connect my monitor with ADV7511, it triggers interrupt (when hot plug detect happens) but more than one time, so I done debouncing. Problem is when I am unplugging ...
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2answers
6k views

How to trigger hot plug detection in HDMI interface?

I'd like to trigger the hot plug detection circuit for one of my graphics card's outputs so that Windows would "think" that it has secondary monitor attached. I know that there is a pin in the HDMI ...
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2answers
227 views

Female to Female HDMI Socket extender [closed]

i want to create a female to female HDMI extender. i used 2 of this breakout board female HDMI socket (here) connected both of them with jumper wires and checked each wire with multi meter. ...
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1answer
124 views

Raspberry Pi power switch preventing gnd from HDMI

I got a problem with my Raspberry Pi setup. I'm currently using an arduino to control an IRL520N to switch GND on and off on the rasperry and that works great, or it did... My setup also includes an ...
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1answer
59 views

What type of connector should I use for multichannel(16) RF analog signals? Can I use HDMI?

I need to select a connector type for 16 pair of wire. The signal is analogic and in the frequency range of 1 MHz. I prefer not to use 16 SMA connectors, however I am fine to use 4 blocks of connector ...
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1answer
141 views

Extending an HDMI port or Display cable? [closed]

I am working on building this project for my Raspberry Pi well I need to extend the HDMI port of this monitor http://store.hp.com/us/en/pdp/hp-22er-215-inch-display I need to place the display in an ...
4
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1answer
333 views

Is it possible to drive a HDMI output without exact clock frequencies (74.25 MHz, etc.)?

I'm driving a TFP410 parallel to DVI (HDMI) converter using a DM368. Unfortunately I can't generate the exact clock frequencies required for HDMI CEA modes (74.25 MHz, 148.5 Mhz, etc.), I'm stuck with ...
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3answers
365 views

I2C Slave address

What is the best way to discover if the I2C slave address is given in the 8bit or 7bit format in datasheet? As I can see from programming guide for ADV7511 page 16: ...
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0answers
101 views

Using the wires in an HDMI cable for carrying power?

Could I use an HDMI cable in conjunction with a breakout board on both ends to drive several stepper motors all through one cable? Or do the wires have special properties that would make them ...
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0answers
75 views

How to drive an HDTV with an 8 bit MPU?

Is it possible/reasonable to generate a 480 x 270 image with an 8 bit MPU, store the image in external memory, upscale the image to 1920 x 1080, and generate an HDMI signal for the upscaled image? ...
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2answers
458 views

Is the HSync and VSync signal level kept high after data period or are they present only during single cycle

I'm trying to understand HDMI specification for my toy project on Zybo. I'm trying to understand when I get HSync and VSync signals. I get them once. That means I don't need to look back on previous ...
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1answer
192 views

Serial DB9 to Serial 3.5mm over HDMI cabling

Good afternoon everyone. I am trying to control a Samsung TV via Serial from a remote processor and I am trying to use spare installed HDMI cabling to do it. Samsung does not have an open API for IP ...
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0answers
379 views

How to connect flexible flat cable

I'm trying to connect this to this. From another question I asked (I can't find it anymore) the cable is a flexible flat cable, and I should pull out the black plastic piece at the bottom right of the ...
0
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1answer
806 views

Can I Hook a Raspberry Pi Zero to a Laptop Display Via HDMI to TTL and TTL to LVDS?

Dilemma: I have a project in which I am trying to use a Raspberry Pi Zero to display static content through a laptop screen. I am trying to make my unit as thin as possible and use as little power as ...