A video wall consists of multiple computer monitors, video projectors, or television sets tiled together contiguously or overlapped in order to form one large screen. Typical display technologies include LCD panels, LED arrays, DLP tiles, and rear projection screens. Simple video walls can be driven from multi-monitor video cards, however more complex arrangements may require →
The trend in professional audio systems seems to be that audio signals are move and more moving from balanced analogue interfaces and proprietary digital interfaces to Ethernet networking. There are many good reasons for that, which I am not going through in this post, for more information on reasons for transition look my earlier postings →
I took a quick walk-trough on AudioVisual 13 fair in Helsinki Finland. Here are some pictures from the event. In the morning there were not too many visitors as you can see. The audio and video stuff was pretty much similar than on previous years. Nothing really spectacular new. Multitouch showed very big touch screens, →
AudioVisual Helsinki 2013 fair starts tomorrow. International Audio Visual exhibition will bring together the Helsinki Fair Centre from 13 to 15.11.2013 professionals, planners, decision-makers, audio-visual equipment, systems and services to the purchasing companies and educational institutions representatives, event producers and organizers, as well as the major product and service providers, and organizations. →
I have written about sending video signals over UTP cable. I have covered single composite video signal and audio. Now it is time to discuss sending VGA over UTP cable. Some DIY people (including me) have built different kind of adapters from VGA connector to RJ-45 connector. In best cases simple passive connection between those →
VLC is a free and open source cross-platform multimedia player. A new version of VLC media player has releases a short time ago. VLC is 2.1 (codenamed “Ricewind”) is a major upgrade because it includes a new audio core, hardware decoding and encoding, port to mobile platforms, preparation for 4K Ultra-HD video and support for →
I have written about passive methods on adapting 75 ohm video signals to 100 ohms UTP wiring at Differential video signals on UTP cable section of ePanorama.net and my postings Audio, Video and other signals over UTP, Video over UTP and Video over UTP – commercial balun circuit articles. Possibility to send composite video signals →
The secret to sending analogue video signals over UTP is to balance them well. Video balun is a device made for this. I earlier write about Video over UTP and my own experiments related to it. Here is a look wat what is inside a commercially made inexpensive video balun, in this case LLT-201 from →
Traditionally analogue video transmission is done using 75 ohm coaxial cables. Those video signals are not directly compatible with nowadays more widely used twisted pair wiring (CAT5, CAT6 etc..), which means you just can’t wire the signals directly form video output to a twisted pair wire. The mains problems in connecting 75 ohms video source →
I have searched for some time a suitable software (preferably free) that allows me to measure Bode plot of electronics circuits. There are commercial software, special hardware and special instruments for that (network analyzer can usually do that on radio frequencies), but I wanted something that uses the hardware I already has. After some searching →