Digital Visual Interface

Transcription

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2 Digital Visual Interface Digital Display Working Group Steve Spina Strategic Initiative Manager Intel Corporation

3 DDWG Promoters Promoters form the DDWG Spec Control Board

4 DDWG Objectives Establish a universally accepted Industry Standard Interface for digital monitors. Provide for open and royalty-free implementations. Based on TMDS technology from Silicon Image, Inc. Publish an approved Specification Rev. 1.0 by end Mar 99

5 TMDS Link Overview Serial data channels & clock 24 bit data 3 Controls Pixel Clock Transmitter Encoder/ Serializer Clk Gen C2 C1 C0 Clk Receiver Recovery/ De-serializer Clk Gen Digital Monitor Serialized Digital Data Transmission No inter-pair skew issues

6 Dual Link Scalability DVI supports a 2nd TMDS link 3 additional pairs; uses same clock Must insure monitor-system compatibility Link-2 only used above 165 Mpix/sec cut-over frequency 2-Link Monitors need 1-link formats for all-system compatibility DVI = B/W Scalability for the Future

7 Bandwidth Roadmap Single Channel Bandwidth [Gbs] Hz LCD 5% Blanking 0 Copper Barrier One TMDS Link (3 channels) Pixel Bandwidth [MPix/sec] Single Link Two Links (6 channels) Legend: SVGA (800x600) SXGA (1280x1024) UXGA (1600x1200) HDTV (1920x1080) QXGA (2048x1536) 60 Hz CRT GTF Blanking 85 Hz CRT GTF Blanking

8 DVI Connector System One connector shell; two implementation choices: DVI-V: Digital only (use with legacy VGA) DVI-I: Integrated (includes new analog RGB for bundled/workstation systems)» One shell means: Digital monitor plugs into both (following slides) Provides 29 connections 18 - TMDS (incl( incl.. shields) 5 - Plug-n-Play 6 - RGB+return, H, V

9 DVI Connector w/ VGA SYSTEM or GRAPHICS BOARD Back of PC DVI-V(GA) Target Use - Mainstream desktop - w/ VGA conn. MONITOR Legacy VGA DIGITAL

10 DVI Connector w/out VGA SYSTEM or GRAPHICS BOARD Requires VGA Adapter DVI-I(ntegrated) Target Use - Workstn - Small f/f - Bundled sys MONITOR Legacy VGA DIGITAL New Analog

11 Interoperability Map VGA DVI-V(GA) DVI-I(ntegrated) SYSTEM WILL NOT MATE MONITOR Fully Interoperable Legacy VGA DIGITAL New Analog Fully Compatible System

12 Digital Display Ramp Analog / Digital Distribution Desktop Analog (VGA) Monitors Today DDWG Spec Announced Digital CRTs Introduced Time? LCDs - Plasmas New Display Technologies Introduced New Technology Digital CRTs Analog Legacy REMOVED!!

13 Standards Compatibility VESA P&D and Compaq DFP standards are TMDS-based Same signaling protocol as DVI Same electrical interface Can inter-operate by using a connector adapter Currently shipping TMDS products are DVI compatible

14 Plug-n-Play: EDID EDID Support Required Intent: EDID structure 1.3 (required when completed) Structures 1.2 and/or 2.0 interim Hot Plug Required on Monitor System side requirment is PCxx driven Using VESA P-n-P Standards Avoid New / Duplicates

15 Image Scaling All EDID declared resolutions REQUIRE monitor scaling to full screen (in at least 1 dimension) Readable display required for 640 x 480 (full screen not required) Scaling not prohibited in Graphics When presenting a monitor-declared resolution, default to monitor scalar. Monitor Provides Primary Scaling Support

16 Power Management Link Active Full ON Link Inactive Mech. OFF Power Switch Active OFF Timer Expired Intermediate Based on Link Active Information

17 Future DVI Enhancements Copy protection Protocol support in addition to raster scan? Selective (addressable) update? Color depth > 24 bits? Packet transport (e.g., MPEG-2) All new features will be backward compatible NO Connector Changes Solid long term Standard

18 Summary Web Site: DDWG info -- Q&A Adopter s (License) Agreement Completed Rev. 1.0 Spec Ready for Implementation Spec completed Connector: production volume 2Q99 Silicon: shipping, multi-sourced