beautypg.com

Common av signals and interfaces, Digital video – ClearOne Digital Media User Manual

Page 6

background image

Digital Video

HDMI

– High-Definition Multimedia Interface (HDMI) technology

is a global standard for connecting high-definition products.
With HDMI’s uncompressed all-digital interface the viewer
receives both dazzling quality and ease of use. Well over 1,000
manufacturers incorporate HDMI connectivity into a growing
list of consumer products from HDTVs, Blu-ray Disc Players,
Gaming systems, Digital video cameras, Mobile devices and
more.

The flexibility of HDMI is in the single cable capable to transmit digital video, digital audio,
and control data through a high-speed link.

HDMI offers

enormous bandwidth capacity

of up to 10.2 gigabits per second, more than

twice the bandwidth needed to transmit an uncompressed 1080p signal. This enables
better looking movies, faster game play, richer audio, 3D movies and gaming. Additional
benefits include higher resolution support beyond 1080p such as 1440p or Quad HD, faster
refresh rates like 120Hz or beyond and deep color, taking the HDTV display palette from
millions to trillions of colors. It should also be noted that HDMI specifies a robust digital
rights management scheme (DRM) known as HDCP. For this reason premium content
owners allow full HD output typically over HDMI only and not analog interfaces such as
component video.

DVI

- The Digital Visual Interface (DVI) is a video interface

standard designed to provide high quality direct digital
connection of source devices to digital display devices such
as flat panel LCD computer displays and digital projectors.
DVI was developed by an industry consortium, the Digital
Display Working Group (DDWG) to replace the “legacy
analog technology” VGA connector standard and is designed
for carrying uncompressed digital video data to a display.
Because it is partially compatible with the High-Definition

Multimedia Interface (HDMI) standard in digital mode (DVI-D), and VGA in analog mode
(DVI-A) some devices will display a digital signal originating from a DVI connector but
terminating to an HDMI port. However, care must be taken in mixing and matching the
standards as certain data types and signals are not fully supported by DVI, but may be
supported by HDMI.

pg 6

StreamNet Digital Media and System Design Reference Guide

Common AV Signals and Interfaces

HDMI

DVI