Questions tagged [hdmi]
HDMI (High-Definition Multimedia Interface) is a digital audio/video interface.
135
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15 views
FYGA/B HDMI Test [closed]
I am looking for a solution to test the cable and FYGA/B antenna that connects via a HDMI cable to Nokia base station. The cable is multicore, so not RF. Does anyone know of a tester for this type of ...
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0answers
62 views
How is this monitor's signal possible?
I made some high speed camera shots from various PC monitors in order to capture the screen composition. For the most monitors I got photographs that match my expectations (image is built from top to ...
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1answer
62 views
Fullsize HDMI vs microHDMI, electrical considerations
I'm going to use an HDMI cable in an industrial setting to connect a screen to a Raspberry Pi. We are considering using the Pi 4 instead of the Pi 3 which we have been using earlier. The Pi 4 has ...
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0answers
44 views
How to measure refresh rate of HDMI signal?
I would like to measure the latency and/or overall time delay (and reproducibility) of a signal being transmitted via HDMI. That is the time interval between me clicking a button saying "update" and ...
-3
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1answer
67 views
Need help identifying solder point, Is it ethernet, usb, what is it
My end goal is to completely rewrite the flimware to create a super secure system. So what I have so far, I have a hdex0016m1 with 2 confirmed uart ports one in use and one nothing was currently going ...
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62 views
HDMI Development: What Would Cause Thin Pink Lines?
I recently designed a board which produces an HDMI output for an oscilloscope so it is viewable on an external monitor. My prototypes seemed to work just fine with one or two mod wires. However, after ...
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1answer
64 views
Why does this USB device draw different currents from different sources?
What would cause a USB device to draw drastically different amounts of current, but still function properly?
Background & Research:
I purchased a Playstation 2 Graphics port->HDMI converter (...
0
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1answer
75 views
HDMI splitter @ 4K [closed]
I want to make HDMI splitter which support 4K resolution,
I have already found some IC's which are cable for splitting HDMI, but unfortunately non of them supported 4K and they only supported 1080P/...
0
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1answer
19 views
Which are the physical factors that determine the maximum transportable resolution of a cable (for instance: HDMI)?
Which are the physical and electrical factors that determine that an old generation HDMI can transport for instance 1080p resolution, while a new HDMI (2.0) arrives at 4k?
Is it due to a different ...
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3answers
72 views
Split hdmi signal the passive way
I would like to know if it's possible to split a HDMI signal (generate by raspberry pi or equivalent) to a deserializer (TFP401APZP) and to a micro HDMI.
I have a source going direct to the TFP and ...
0
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2answers
106 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
195 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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0answers
49 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
86 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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0answers
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 ...
0
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1answer
44 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 ...
0
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1answer
209 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 ...
0
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1answer
29 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
265 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 ...
0
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1answer
207 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 ...
2
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2answers
614 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....
1
vote
1answer
118 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 ...
0
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1answer
227 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
455 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
4k 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
138 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 ...
39
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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
43 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. ...
0
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1answer
68 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 ...
4
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2answers
668 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
226 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
121 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 ...
4
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1answer
194 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" ...
0
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1answer
359 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 ...
1
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2answers
115 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 ...
0
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1answer
79 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
171 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 ...
0
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1answer
50 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 ...
2
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1answer
146 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 ...
2
votes
1answer
537 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
122 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
587 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
2k 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
votes
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
97 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 ...
0
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1answer
274 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
vote
1answer
37 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 ...
4
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2answers
7k 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 ...
-4
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2answers
268 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. ...
0
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1answer
129 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 ...
