Datasheet

High-Definition Graphics-to-Video Option

Features Enabling Digital Broadcasting •Real-time graphics-to-video output for The convergence of digital broadcasting, high-definition television, and Silicon Graphics Onyx2 and the SGI Onyx 3000 series high-performance computing has led to unique capabilities and demands •SD and HD video formats supported for content creation. HDTV enables the delivery of extremely high-quality •4:2:2 YCrCb video sampling with 8 or 10 bits per images with high bandwidth and resource requirements. The SGI™ Onyx® component family of high-performance graphics systems is the premier graphics and •Alpha channel (8 or 10 bits) full sampling rate supported compute platform enabling this convergence. •16x9 or 4x3 aspect ratio •Fully programmable audio and video synchronization in The High-Definition Graphics-to-Video Option (HD GVO) from SGI allows hardware with SGI Digital Media Libraries real-time, uncompressed video to be output from the graphics frame buffer. Various HD or CCIR-601 SD digital video formats are supported, including NTSC, PAL, 1080i, and 720p.

HD GVO connects to the Silicon Graphics® Onyx2® and SGI™ Onyx® 3000 series graphics pipe by a TVO daughtercard. The TVO daughtercard connects to the Video Break-Out Box (VBOB) using TMDS cables supplied by SGI. The VBOB provides industry-standard connections to external video devices via serial digital interfaces.

User-selectable, high-quality, real-time colorspace conversion from RGB graphics enables live broadcast in virtual set or performance animation applications. In addition, editing and compositing applications can directly feed broadcast monitors using HD GVO to provide a reliable preview of color correction and image filtering functions.

A System with a Future The SGI Onyx family is uniquely positioned to provide digital broadcasting solutions today with a path for future growth. A wide range of video formats to enable digital broadcasting is supported at first release. Additional formats, field/frame rates, and sampling will be developed and provided as future software upgrades. High-Definition Graphics-to-Video Option Technical Specifications

Supported Video Formats (First Software Release)

Video format Scanning Field/frame rates (Hz) Notes

1920x1080 Interlace 59.94 SMPTE 274M 1280x720 Progressive 59.94 SMPTE 296M 720x486 Interlace 59.94 CCIR-601 720x576 Interlace 59.94 CCIR-601

Video Sampling External Connections •4:2:2 YUV •4:2:2:4 YUVA HD Video Output •8 or 10 bit •SMPTE 292M (dual redundant connections) •Video and alpha connections Colorspace Support •SMPTE 240M SD Video Output •ITU-R BT.601 •SMPTE 259M (dual redundant connections) •ITU-R BT.709 •Video and alpha connections

Supported Platforms Genlock Input •Silicon Graphics Onyx2 InfiniteReality2™ and InfiniteReality3™ •House HD reference signal (loop-through) •SGI Onyx 3000 series InfiniteReality2 and InfiniteReality3 •Analog trilevel signal (loop-through) •IRIX® 6.5.10 or greater •Stand-alone mode (free-running)

Onyx2/SGI Onyx 3000 series HD GVO System HD and SD SDI XTALK Display TVO TMDS Video Video Connections (XIO) Generator Module Outputs Break-Out Box Genlock Connections

Data Flow with High-Definition Graphics-to-Video System

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2000 Silicon Graphics, Inc. All rights reserved. Specifications subject to change without notice. Silicon Graphics, IRIX, InfiniteReality, Onyx, and Onyx2 are registered trademarks, and ©SGI, InfiniteReality2, InfiniteReality3, and the SGI logo are trademarks, of Silicon Graphics, Inc. All other trademarks mentioned herein are the property of their respective owners. 2880 (8/00) J11769