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  • Took subbullets Video … From low-rate to HD 2x better than MPEG-4, 3x better than MPEG-2 Enhanced by Video Smoothing Unmatched WMV Screen Audio Enhanced WMA 9 WMA Pro 9 for up to 8 channel surround home theater experience, 2x better than Dolby’s AC-3 and DTS WMA Lossless 9 for CD ripping without quality loss First “hybrid” WMA Voice 9 codec for voice & music at low bit rates Devices 200+ devices support WMA, 20+ WMV chip partners, …
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    1. 1. Windows Media Audio & Video 9 Series 정지영 대리 Technical Specialist Microsoft Korea
    2. 2. WM Audio & Video 9 Series Key Design Pillars Best Audio Best Video Support for Embedded & Devices <ul><li>Improve quality/efficiency </li></ul><ul><li>Extend the family to multi-channel/high resolution audio </li></ul><ul><li>New innovation in voice and music compression </li></ul><ul><li>Improve quality at all rates </li></ul><ul><li>Enable HD playback </li></ul><ul><li>Improved decoding performance </li></ul><ul><li>Enable hardware (encode/decode) implementations </li></ul><ul><li>Enable efficient hardware implementations </li></ul><ul><li>Strong collaboration with partners for both PC peripherals and non-PC devices/chips </li></ul>
    3. 3. WM Audio & Video 9 Series New family of codecs <ul><li>Windows Media Video 9 </li></ul><ul><li>Windows Media Video 9 Professional </li></ul><ul><li>Windows Media Video 9 Screen </li></ul><ul><li>Windows Media Video 9 Image </li></ul><ul><li>Windows Media Audio 9 </li></ul><ul><li>Windows Media Audio 9 Professional </li></ul><ul><li>Windows Media Audio 9 Lossless </li></ul><ul><li>Windows Media Audio 9 Voice </li></ul>
    4. 4. Windows Media Video 9 <ul><li>State-of-the-art Video compression engine </li></ul><ul><ul><li>Great quality from wireless  dial-up  high-definition video </li></ul></ul><ul><ul><ul><li>160x120 @10kbps  1920x1080 (1080i/p) @ 3-20 Mbps+ </li></ul></ul></ul><ul><li>Superb compression efficiency </li></ul><ul><ul><li>Three times as good as MPEG-2: </li></ul></ul><ul><ul><ul><li>Windows Media HD Video (1280x720p) at SD DVD rates (4-6 Mbps) </li></ul></ul></ul><ul><ul><ul><li>Windows Media SD Video at DVD resolution (720x480p) at 2 Mbps (vs. 6 Mbps) </li></ul></ul></ul><ul><ul><li>Twice as good as MPEG-4 </li></ul></ul><ul><ul><li>15% to 50% improvements over WMV 8 </li></ul></ul><ul><ul><li>New professional level profiles for high data rate SD and HD </li></ul></ul><ul><li>Broadcast-ready </li></ul><ul><ul><li>Support for native-interlacing </li></ul></ul>
    5. 5. Windows Media Video 9 Video Smoothing ( Frame Interpolation) <ul><li>Generates missing frames at playback time </li></ul><ul><ul><li>Can double or triple the decoded frame rate </li></ul></ul><ul><ul><li>Improves perceived video quality/motion smoothness </li></ul></ul><ul><ul><li>Especially useful at lower data rates where full frame rate is difficult to achieve </li></ul></ul><ul><li>Technology can also be used to save bandwidth </li></ul><ul><ul><li>Video can be encoded at lower data/frame rate </li></ul></ul><ul><ul><li>E.g. ICP encodes 15 frames/sec, but user of WM9 Player will experience 30 fps </li></ul></ul><ul><ul><li>Bandwidth reduction reduces operating cost for ICPs </li></ul></ul>
    6. 6. Windows Media Video 9 DEMO vs. QuickTime 6/MPEG-4 Video Smoothing
    7. 7. Windows Media Video 9 Screen <ul><li>Highly efficient compression engine for “palletized video” </li></ul><ul><ul><li>Typical scenario is capturing application/desktop output for training/demo </li></ul></ul><ul><ul><li>Entire desktop can be compressed and transmitted at rates as low as 28kbps! </li></ul></ul><ul><li>Original Version (V7) shipped in 2000 </li></ul><ul><li>Version 9 improves in both picture quality and CPU usage </li></ul><ul><ul><li>More efficient handling of continuous-tone images and window dragging/scrolling </li></ul></ul><ul><ul><li>Results in far higher frame rate </li></ul></ul>
    8. 8. Windows Media Video 9 Screen DEMO WMV 9 Screen
    9. 9. WMA 9 Professional <ul><li>New high-performance audio codec to handle greater than CD resolution/channels </li></ul><ul><ul><li>Up to 96Khz sampling rate, 24-bits, and 8 channels (“7.1”) </li></ul></ul><ul><ul><ul><li>CD is stereo at 44Khz using 16-bit samples </li></ul></ul></ul><ul><li>Target application is multi-channel music distribution and movie sound tracks at broadband rates </li></ul><ul><ul><li>Current multi-channel unsuitable due to high data rate </li></ul></ul><ul><ul><li>E.g. minimum of 384kbps for Dolby </li></ul></ul><ul><ul><ul><li>Leaves too little for video on typical DSL/cable connection </li></ul></ul></ul><ul><ul><li>WMA Pro can handle 5.1 from just 128kbps </li></ul></ul><ul><li>Multiple encoding modes including 2-pass/VBR </li></ul>
    10. 10. WMA 9 Professional DEMO <ul><li>WMA 9 Professional </li></ul><ul><li>192K WMA Pro 5.1 vs. 192K MP3 </li></ul>
    11. 11. Windows Media Audio 9 Lossless <ul><li>Mathematically lossless audio compression </li></ul><ul><ul><li>“ Rip once” – preserves full fidelity of the original </li></ul></ul><ul><ul><ul><li>Decoded stream matches the original bit-for-bit </li></ul></ul></ul><ul><ul><li>Customers no longer have to worry about ripping with ever improving audio codecs </li></ul></ul><ul><li>Range: CD resolution to 24-bit/96Khz/7.1 </li></ul><ul><ul><li>Compression ratio is 2:1 for CD source </li></ul></ul><ul><ul><ul><li>Good fit for ever increasing PC hard disks (200 CDs in 50GB hard disk) </li></ul></ul></ul><ul><ul><ul><li>Competitive with top lossless audio codecs, e.g., Monkey, LPAC, MLP (DVD-Audio) </li></ul></ul></ul><ul><ul><li>Compression ratio improves as resolution/sampling rate/channel count increases because of increased redundancy </li></ul></ul><ul><li>Integrated into Windows Media Player 9 CD copy function </li></ul>
    12. 12. Windows Media Audio 9 <ul><li>Third iteration of backward compatible improvements to WMA </li></ul><ul><ul><li>20% quality improvement over WMA 8 without changing decoded stream syntax </li></ul></ul><ul><ul><li>Compatibility key to satisfying non-PC devices/partners </li></ul></ul><ul><li>New encoding modes deliver even better sound </li></ul><ul><ul><li>Quality-based VBR mode </li></ul></ul><ul><ul><ul><li>User can select quality instead of bit rate </li></ul></ul></ul><ul><ul><li>“ Perceptually lossless” mode </li></ul></ul><ul><ul><ul><li>Highest quality VBR encoding mode </li></ul></ul></ul><ul><ul><ul><li>Indistinguishable from the original even for most audiophiles </li></ul></ul></ul><ul><ul><ul><li>Typical compression ratio of 5:1 </li></ul></ul></ul><ul><ul><ul><li>Available as a ripping option in Media Player 9 </li></ul></ul></ul><ul><ul><li>2-pass mode, applies to both CBR and VBR </li></ul></ul>
    13. 13. Windows Media Audio 9 Voice <ul><li>Unique “hybrid” voice and music coder for low data rates (<= 20Kbps). </li></ul><ul><ul><li>First codec to properly handle mixed mode content (e.g. news plus musical commercial) </li></ul></ul><ul><ul><li>Uses an auto/manual classifier to detect voice/music </li></ul></ul><ul><ul><li>Applies appropriate coding mode for each segment </li></ul></ul><ul><li>Voice mode: new proprietary voice codec </li></ul><ul><ul><li>20% better than ACELP shipping today (used by Real and WM) </li></ul></ul><ul><li>Music mode: WMA algorithms </li></ul>
    14. 14. WMA 9 Voice DEMO <ul><li>WMA 9 Voice </li></ul>
    15. 15. Windows Media Audio & Video 9 Summary <ul><li>Great video quality from low bit rates to HD </li></ul><ul><ul><li>2x better than MPEG-4, 3x better than MPEG-2 </li></ul></ul><ul><ul><li>Enhanced Screen codec </li></ul></ul><ul><ul><li>Unique Video Smoothing </li></ul></ul><ul><li>Rich family of audio codecs with best quality in industry </li></ul><ul><ul><li>Multi-channel/high-res audio from 128-768 Kbps </li></ul></ul><ul><ul><li>Improved WMA 9 backward compatible codec with VBR </li></ul></ul><ul><ul><li>First “hybrid” speech/music codec </li></ul></ul><ul><li>Strong momentum in device space </li></ul><ul><ul><li>130+ devices support WMA </li></ul></ul><ul><ul><li>30+ partners designing/porting WMV 9 encoders and decoders </li></ul></ul>
    16. 16. Questions?
    17. 17. Backup
    18. 18. Audio & Video Compression: Industry Comparison
    19. 19. Windows Media Audio& Video 9 Device Strategy <ul><li>WMA “bit stream syntax” already frozen for three years </li></ul><ul><ul><li>Key requirement for hardware implementation </li></ul></ul><ul><ul><li>Many decoder chips/ports already available </li></ul></ul><ul><ul><li>130+ non-PC devices support WMA </li></ul></ul><ul><li>WMV 9: bit stream syntax frozen for the first time </li></ul><ul><ul><li>Actively working with 30+ hardware partners for decoders and encoders </li></ul></ul><ul><ul><ul><li>Many target applications from DVD players to STBs and video appliances </li></ul></ul></ul><ul><ul><li>DirectXVA hardware acceleration of WMV 9 decoding in graphic cards from all major manufacturers </li></ul></ul><ul><li>Broad licensing program available for both </li></ul>
    20. 20. Windows Media Video 9 Image <ul><li>New codec which enables still images to be transformed into full screen video using pan and zoom effects </li></ul><ul><li>Cross dissolve transitions can be added between clips </li></ul><ul><li>Results can be delivered at data rates as low as 20kbps </li></ul><ul><li>Compressed using either 1-pass CBR or VBR, they can be shared as they are much smaller than the original images </li></ul>

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