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The SMPTE 421M "VC-1" Standardization Project

The SMPTE 421M "VC-1" Standardization Project. Mark Jeffrey Microsoft Corporation markjeff@microsoft.com. VC-1 & Windows Media. Microsoft submitted WMV9 syntax for standardization to SMPTE in Summer 2003 SMPTE C24 standardizing WMV9 into open standard

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The SMPTE 421M "VC-1" Standardization Project

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  1. The SMPTE 421M "VC-1" Standardization Project Mark Jeffrey Microsoft Corporation markjeff@microsoft.com

  2. VC-1 & Windows Media • Microsoft submitted WMV9 syntax for standardization to SMPTE in Summer 2003 • SMPTE C24 standardizing WMV9 into open standard • Includes Simple, Main and Advanced Profiles • Will be known as SMPTE 421M / VC-1 when standard is published

  3. VC-1 & Windows Media • WMV9 and VC-1 are identical codec technologies • WMV9 is Microsoft’s implementation of the VC-1 standard • WMV9 decoder = VC-1 decoder • Transport independence • VC-1 elementary stream can be delivered over ASF, RTP, MPEG-2 Systems • Improved system-layer design in Advanced Profile • Start codes • User data • Entry Point header • Display metadata

  4. SMPTE Standardization Process • SMPTE is producing 3 documents • VC-1 specification – SMPTE 421M • VC-1 conformance – SMPTE RP228 • VC-1 transport – SMPTE RP227 • Over 60 companies working on VC-1 in SMPTE • Participants represent broad segments of the digital video industry (Content providers; CE, Chip, Encoder, Test equipment manufacturers; DTV Operators) • Standard is quality-driven

  5. SMPTE Standardization Process September 2003 WD1 WD4 CD ballot March 2004 CD1 CD1r5 CD ballot November 2004 CD2 CD2r3 FCD ballot FCD1 April 2005 DS

  6. Towards Draft Standard… • All 3 documents recently achieved FCD status • FCD status means VC-1 specification is technically stable and opens the gates to DS (Draft Standard) balloting • Reference decoder implementation and conformance bit streams available to SMPTE members

  7. Other Standards and Consortia

  8. Chips and DSPs

  9. Professional Video Products

  10. VC-1 vs. H.264 - Features • 8x8, 4x8, 8x4, 4x4adaptive block size • Frequency-independent dequantization scaling • VLC-based entropy coding • 4 tap bicubic filters for MC • Relatively-simple loop filter • Overlap intra filtering • Range reduction/expansion • Resolution red./exp. • 8x8 and 4x4adaptive block size • Frequency-dependent dequantization matrix • CABAC or VLC • Long filters for MC • Complex loop filter • Spatial intra prediction • Multi-picture arbitrary-order referencing • Intra PCM Block motion 16-bit integer transforms Bit-exact spec Fading prediction Loop filter VC-1 H.264

  11. VC-1 vs. H.264 - Quality • Both codecs approximately • 2-3x better than MPEG-2 • 2x better than MPEG-4 • VC-1 achieved best quality in independent studies • 2 rounds of DVD Forum tests for HD, Oct-Dec 02 • C’T Magazine codec evaluation, May 03 • DV Magazine evaluation for HD codecs, Oct 03 • C’T Magazine HD codec evaluation, May 05 • Most consistent quality in EBU tests, Oct 04

  12. VC-1 vs. H.264 - Complexity • VC-1 decoding is > 2x faster than H.264 decoding • H.264 ~ 3-4x slower than MPEG-2 MP / MPEG-4 SP • Based on H.264’s own studies • VC-1 ~ 1.5x slower than MPEG-2 MP / MPEG-4 SP • Based on empirical data, e.g., testing VC-1 (WMV-9) vs. MPEG-4 SP in PCs • 1080p VC-1 software decoding possible on today’s PCs • DVD companion discs with 720/1080p

  13. Microsoft Tools • Windows Media Encoder • 5 speed settings: super real-time to best quality • Free download • VC-1 Porting Kit RTM • Fully aligned with latest SMPTE VC-1 specification • Comes with set of conformance test vectors • Encoder and Decoder Porting Kit • MPEG-2 Utility Package beta • ASF  MPEG-2 Transport conversion utilities • Encoder utility with direct encapsulation into MPEG-2 Transport • RTM scheduled for mid-2005

  14. Conformance Testing Program • Program available for licensees • New tools to facilitate initial self-conformance • Microsoft validates the submissions • VC-1 Elementary Stream analyzer tool will be available soon

  15. VC-1 Platform Support Windows Media platform includes VC-1 and enables integration of all A/V devices in networked home

  16. Why VC-1? • Requires less computational power and can be decoded at full 1080i/p resolution on today’s off-the-shelf PC • Advanced Profile delivers compression efficiencies far superior to MPEG-2 • Delivers HD content at bit rates as low as 6-8 Mbps • Better visual quality demonstrated in independent tests

  17. Why VC-1? • SMPTE VC-1 is nearing standardization and widespread adoption is underway through the implementation of WMV9 • VC-1 is fueling the coming wave of HD content everywhere – from next generation DVDs, set top boxes, PCs and more • VC-1 is being adopted by industry leaders in the broadcast, content and wireless industries for new and innovative backend solutions and delivery services

  18. Backup Slides

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