This week’s newsletter is to present ways of utilizing Aurora HDMI converters and extenders to eliminate the need for legacy analog signal based systems. In addition, we have included our white paper on the HDMI common issues to avoid to assist in making your installations as good as they can be.
Aurora HDMI Converter and Extender Applications & Solutions
Legacy Analog (VGA / YPbPr/ Audio) on Digital HDMI Matrix or Switchers
Managing analog and digital audio / video with multiple matrixes adds cost ,complexity and uses valuable rack space. Instead, a single HDMI matrix can be used in combination with the Aurora converters. The VGA and YPbPr sources can be fed into the ASP-VTH which converts the analog source with audio to an HDMI source to be fed into the matrix (ASP-88 per the diagram). To deal with the audio into the amplifier (AS-AMP1 per the diagram) an ASP-HTD can be used on one of the outputs to break out the HDMI audio into an analog L/R or digital S/PDIF. In the event an output device has only a VGA input and provided the HDMI is not encrypted the ASP-HTV can be used on the HDMI matrix output. Through the use of these simple converters, the systems core can be digital and wiring can become less complex especially to the display device which will now only require an HDMI connection.
DVI Displays on an HDMI System
A common issue on an HDMI Matrix or switcher is the use of a DVI display on one or more of the outputs. If the EDID of the HDMI dipslay is used then the DVI will not show an image. If the EDID of the DVI is used then the HDMI displays will have no audio. To solve, use an ASP-HTD (HDMI to DVI converter) on any output with a DVI destination. This way the HDMI EDID can be learned and when the matrix routes to the DVI output(s) the HDMI source will be converted by the ASP-HTD back into DVI with the seperate audio thus solving the issue.
DVI with analog Audio into an HDMI matrix
The ASP-DTH combines the DVI video with the audio channel into the single HDMI feed, allowing integration into the HDMI matrix / switching solution.
When going long distances with HDMI there are a variety of ways to extend the HDMI. For shorter distances the ASP-CATx1 or ASP-CATx2 can be used. Keep in mind CAT 5/6 solutions distance is limited by the bandwidth. The higher the resolution and color depth, the lower the distance. For example, if 480p is the max resolution the cable can be over 200ft, however, if 1080p is used with 36bit then about 65ft – 80ft can be used. For best distance when using HDMI CAT solutions choose CAT 6 solid core no shield for best results. For longer distances, fiber is the perfect solution. The ASP-FIBRS1 can go over 300m (@1000ft) with a single multi-mode fiber. Bandwidth will not affect the fiber solution and it can also transmit and receive RS-232 control data.
HDMI Common Issues to Avoid
Looking to start diving into the world of HDMI or already in it but not having too much fun… well hang in there as it is not that bad and in some case pretty easy when you know the rules of the game and how to avoid the common pitfalls that cause the most grief. Below is a list of some of the most common issues to addressed before the install and in turn will save time, money and keep everyone happy especially the customer. Enjoy.
1080p will not go nearly as far as 480p so always get the distance specification for the resolution you will be using. Most extenders list their best distance at the lower resolution.
shielded if the environment calls for it due to interference and remember to only ground one end of the shield.
HDMI Matrix, Switchers, Distribution Amps
between the HDMI output and the destination. Since the HDMI source device will output HDMI if it
learns the EDID of one of the other outputs that may be HDMI, the DVI device will not get an image. If the EDID is learned from the DVI device then the HDMI outputs will not get audio although the DVI will now get video.
market can only support one HDCP output per input source.
desired. Even if a display does not have a native resolution of the best display device being fed, it is important it has the ability to downscale the higher resolutions. Failure to do so will result in having to learn the EDID of a common denominator of the output devices so the 1080p 60 frame device would have to settle for 720p if this is not done. This applies to color depth as well.
otherwise you may be limited to the EDID built into the device.