ITU-T VICA Workshop 22-23 July 2005, ITU Headquarter, Geneva International Telecommunication Union The SMPTE 421M "VC- The SMPTE 421M "VC- 1" Standardization 1" Standardization Project Project Mark Jeffrey Microsoft Corporation [email protected]
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ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva
International Telecommunication Union
The SMPTE 421M The SMPTE 421M "VC-1" "VC-1"
Standardization Standardization ProjectProjectMark Jeffrey
Microsoft [email protected]
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
VC-1 & Windows Media
o 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
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
VC-1 & Windows Media
o WMV9 and VC-1 are identical codec technologies• WMV9 is Microsoft’s implementation of the VC-1
standard• WMV9 decoder = VC-1 decoder
o 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
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
SMPTE Standardization Process
o SMPTE is producing 3 documents• VC-1 specification – SMPTE 421M• VC-1 conformance – SMPTE RP228• VC-1 transport – SMPTE RP227
o 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
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
SMPTE Standardization ProcessWD1
WD4
CD1
September 2003
March 2004
CD1r5
CDballot
CDballot
CD2November 2004
CD2r3FCDballot
FCD1April 2005
DS
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
Towards Draft Standard…
o All 3 documents recently achieved FCD status
o FCD status means VC-1 specification is technically stable and opens the gates to DS (Draft Standard) balloting
o Reference decoder implementation and conformance bit streams available to SMPTE members
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
Other Standards and Consortia
DVD Forum:
Group mandated MPEG-2, VC-1 and H.264 for next gen HD DVD players
Blu-ray: Group mandated MPEG-2, VC-1 and H.264 as formats for next gen BD players
FVD: Group mandated only VC-1Other: VC-1 optional in DLNA,
becoming part of DVB spec set, under ATSC consideration, …
Benefit: Rapidly growing ecosystem support for VC-1
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
Chips and DSPs
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
Professional Video Products
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
VC-1 vs. H.264 - Features
• 8x8, 4x8, 8x4, 4x48x8, 4x8, 8x4, 4x4adaptive block sizeadaptive block size
•Frequency-independent Frequency-independent dequantization scalingdequantization scaling
•VLC-based entropy codingVLC-based entropy coding
•4 tap bicubic filters for MC4 tap bicubic filters for MC
•Relatively-simple loop filterRelatively-simple loop filter
•Overlap intra filteringOverlap intra filtering
•Range reduction/expansionRange reduction/expansion
•Resolution red./exp.Resolution red./exp.
• 8x8 and 4x48x8 and 4x4adaptive block sizeadaptive block size
•Frequency-dependent Frequency-dependent dequantization matrixdequantization matrix
•CABAC or VLCCABAC or VLC
•Long filters for MCLong filters for MC
•Complex loop filterComplex loop filter
•Spatial intra predictionSpatial intra prediction
•Multi-picture arbitrary-order Multi-picture arbitrary-order referencingreferencing
•Intra PCMIntra PCM
VC-1VC-1H.264H.264
Block motionBlock motion
16-bit integer 16-bit integer transformstransforms
Bit-exact specBit-exact spec
Fading Fading predictionprediction
Loop filterLoop filter
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
VC-1 vs. H.264 - Quality
o Both codecs approximately• 2-3x better than MPEG-2• 2x better than MPEG-4
o 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
o Most consistent quality in EBU tests, Oct 04
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
VC-1 vs. H.264 - Complexity
o 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
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
Microsoft Tools
o Windows Media Encoder• 5 speed settings: super real-time to best
quality• Free download
o 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
o 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
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
Conformance Testing Program
o Program available for licensees• New tools to facilitate initial self-
conformance• Microsoft validates the submissions
o VC-1 Elementary Stream analyzer tool will be available soon
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
VC-1 Platform Support
Windows Media platform includes VC-1 and enables integration of all A/V devices in networked home
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
Why VC-1?
o Requires less computational power and can be decoded at full 1080i/p resolution on today’s off-the-shelf PC
o Advanced Profile delivers compression efficiencies far superior to MPEG-2
o Delivers HD content at bit rates as low as 6-8 Mbps
o Better visual quality demonstrated in independent tests
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva dates
ITU-T
Why VC-1?
o SMPTE VC-1 is nearing standardization and widespread adoption is underway through the implementation of WMV9
o VC-1 is fueling the coming wave of HD content everywhere – from next generation DVDs, set top boxes, PCs and more
o VC-1 is being adopted by industry leaders in the broadcast, content and wireless industries for new and innovative backend solutions and delivery services
ITU-T VICA Workshop22-23 July 2005, ITU Headquarter, Geneva
International Telecommunication Union
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