VP-28 - Overview
5
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Supports two-way CEC communication between the video source (such as a
DVD player) and the digital television, enabling new functionality such as
automatic configuration and one-button play
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Has the capacity to support existing high-definition video formats (720p,
1080i and 1080p, 2K and 4K), standard definition formats such as NTSC or
PAL, as well as 480p and 576p
3.2
About DVI–General Description
The Digital Visual Interface (DVI) is a video interface standard covering the
transmission of video between a source device (such as a personal computer) and
a display device. DVI is designed to carry uncompressed digital video data to a
display. It is partially compat ble with the HDMI (High-Definition Multimedia
Interface) standard in digital mode (DVI-D), and VGA in analog mode (DVI-A).
A single-link DVI connection consists of four TMDS links; each link transmits data
from the source to the device over 1 twisted wire pair. Three of the links
correspond to the RGB components of the video signal: red, green, blue (for a
total of 24 bits per pixel.) The fourth link carries the pixel clock. Each TMDS link
carries binary data at ten times the pixel clock reference frequency, for a
maximum data rate of 1.65Gbps × 3 data pairs for single-link DVI.
The DVI specification mandates a maximum pixel clock frequency of 165MHz
when running in single-link mode. With a single DVI link, the highest supported
standard resolution is 2.75 megapixels (including blanking interval) at 60Hz
refresh. For practical purposes, this allows a maximum screen resolution at 60Hz
of 1,915×1,436 pixels (standard 4:3 ratio), 1,854×1,483 pixels (5:4 ratio), or
2,098×1,311 (widescreen 16:10 ratio). A dual link doubles the number of TMDS
pairs, effectively doubling video bandwidth at a given pixel clock frequency.
The maximum length of DVI cables is not included in the specification since it is
dependent on the video resolution and refresh rate. In general, cable lengths up to
4.5m (15ft) will work for displays at resolutions of 1,920×1,200. This resolution will
work even up to 10m (33ft) if appropriate cable is used. Cable lengths up to 15m
(50ft) can be used with displays at resolutions up to 1,280×1,024. For longer
