Crestron DM-RX1-1G Specifications download pdf (Page 12)

Crestron DigitalMedia™ Design Guide

8 Check website (www.crestron.com) for product availability

Crestron DigitalMedia solves this problem by offering special HDMI cards that will take in a multi-channel audio stream and

output both types of audio for distribution. These special cards are noted by a –DSP suffix.

Convergence

HDMI enables computers to deliver premium media content, including high-definition movies and multi-channel audio

formats. It is the only interface enabling direct connections to both HDTVs and digital computer monitors implementing the DVI

and HDMI standards, which amounts to hundreds of millions of existing DVI displays.

HDMI is fully compatible with all DVI-enabled computers, because HDMI was developed using the same technology as DVI

(Digital Visual Interface), which has been the most common digital connection for computers. However, since HDMI offers both

audio and video over one cable and DVI carried only video, DVI/HDMI connectivity requires a separate audio cable.

What About DisplayPort?

DisplayPort is a new VESA standard for digital video connection, similar to HDMI in functionality. While HDMI was introduced in

2001, the latest DisplayPort specification (1.1a) was released in 2008, which has given HDMI devices a huge head start in

device adoption. The DisplayPort standard was driven by the PC industry, to achieve a low cost process for transferring video

from a computer to a laptop screen and external digital video output. Both protocols support 1080p and higher resolutions,

HDCP content protection, multi-channel audio and Deep Color. HDMI additionally supports some items that DisplayPort does

not, such as CEC control and Dolby/DTS 8-channel audio streams.

VESA realized that they were late to the digital video game with DisplayPort, and it didn’t make sense to have a video output

that could not plug into 95% of the displays in the world today. They created DisplayPort Multimode to enable compatibility

with HDMI and DVI (and sometimes RGBHV – but that doesn’t include content protection). This means that an HDMI input can

accept video from DVI, HDMI and DisplayPort devices – making it the most universal connector going forward.



Summary

Wide support from content providers and the consumer electronics marketplace makes HDMI the future of HD video

transmission. This brings many pitfalls to the uninformed installer (especially in larger installations) and the problems are

not limited to cable length issues. Processing EDID and managing HDCP requires complex microcontrollers, especially

when several rooms are involved. Switching systems must be easily customizable to intelligently handle HDCP and EDID.

DigitalMedia manages these various communication mechanisms and provides extensive troubleshooting information,

so the installer can solve issues like cable failure, device incompatibilities and content protection complications.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 53 54

No comments

Crestron DM-RX1-1G Specifications Page 12