1. Building Products and Production Systems With MXF Bob Edge April 15 th

2. Topics > Introduction and background > Vertical Blanking Interval and MXF > Ancillary Data Packets and MXF > Using MXF in 2005 > Conclusions

3. Introduction and Background > MXF is a a collection of standards and RPs > Hundreds of pages of specifications > Many TV vendors are now shipping their first MXF products > A few issues have been discovered: > Some documentation issues > VBI line and Anc Packets in MXF do not work as expected

4. MXF VBI and Anc Packet Project > Issues identified in June ’04 > Requirement identification and documentation (June to Sept ‘04) > The critical question - how should we proceed? > Do nothing – MXF & SMPTE 331M are actually okay > Revise 331M > Write a new standard for VBI and Anc Packets

5. An Aside -- Why Are 8-Bit Words So Important? > The computer industry builds almost everything in multiples of 8-bits > Memory systems, data path parts, and interface chips > Disks, tapes, other I/O devices > Support for 10-bit sample words is not free > Increases complexity > Additional electronic components may be needed > May impact performance

6. An SD Video Frame Active video – Field 1 Active video – Field 2 Switching line SAV EAV Switching line

7. Information Preceding Switching Line > The lines before a switching line can be lost > These lines are from the stream preceding the switch > The switching line is scrambled > The following lines are from the new stream > These lines are used... Active video – Field 1 Active video – Field 2 Switching line SAV EAV Switching line

8. MXF & The Vertical Blanking Interval

9. VBI Lines Captured For MXF > Required - Lines between the switching line and active video > Recommended – The 1st line of active video > Allowed - Any other line Active video – Field 1 Active video – Field 2 Switching line SAV EAV Switching line

10. Sampling The Samples... > The interesting set of sample words varies > Luma only > Chroma only > Luma and chroma > Real devices exist that use all three formats > How many bits per sample? > 1-bit, 8-bit, and 10-bit samples are all in use

11. Sample Packing – 8-Bit Samples 9 0 9 0 9 0 9 0 07070707 Source video samples MXF sample coding

12. Sample Packing – 10-Bit Samples 9 0 9 0 9 0 Source video samples 31 0 MXF sample coding

13. Sample Packing – 1-Bit Samples 07 9 0 9 0 9 0 9 0 9 0 Source video samples MXF sample coding

14. MXF and Ancillary Data Packets

15. Anc Packets Anc data flagsData count Data ID User data Max 255 words Check sum Anc data number or secondary data ID

16. V-Anc Space > Anc packets in the vertical blanking lines Active video – Field 1 Active video – Field 2 Switching line SAV EAV Switching line

17. H-Anc Space > Anc packets in the horizontal blanking space > The space before the switching line in each field is risky > H-Anc is used for embedded audio Active video – Field 1 Active video – Field 2 Switching line SAV EAV Switching line

18. MXF Anc Data Packets > The proposed MXF encapsulation covers the complete Ancillary data space Active video – Field 1 Active video – Field 2 Switching line SAV EAV Switching line

19. Anc Packet 8-Bit Word Packing Anc data flagsData count Anc data number or secondary data ID Data ID User data Max 255 words Check sums Captured data Dropped data 9 0 Parity and inverted parity

20. Anc Packet 10-Bit Word Packing Anc data flagsData count Anc data number or secondary data ID Data ID User data Max 255 words Check sums Captured data Dropped data 9 0 Parity and inverted parity

21. VBI & Anc Packet Project Timeline Requirements defined and documented Design ideas considered and selected 1 st draft standard written 2 nd SMPTE Ballot Trial Publication Q3Q4Q1Q2Q3 2004 2005 T oops 1 st SMPTE Ballot Now

22. A Product Offering Strategy > MXF file I/O (at the network interface) > MXF as a storage format in archives > Modular MXF file readers and writers > Simplifies the SW development project > Allows integration with a wide range of existing and new products > Focus on interoperability work with other vendors > Limit complex feature support for now

23. An MXF Server Solution PDR 400 PDR 300 PVS 3500 PVS 1100 PVS 3000 PVS 2000 PVS 1000 UIM OpenSAN Fibre Channel Gigabit Ethernet MXF PDR 100 PDR 200 No data network capability JPEG only

24. Using MXF In 2005 > Don’t overstate short-term requirements > Use lower-lever Operating Patterns (Op1a) > Set realistic metadata requirements > Installation and integration plans > Is your installation a first? > Multi-vendor interoperation requirements > Is a proof-of-concept verification needed? > Consider upgrade, support, and issue resolution strategies

25. Conclusions > The basic set of MXF standards are complete > MXF will evolve over time > Use high-value low-risk capabilities first > Finished material transfers Active video – Field 1 Active video – Field 2 Switching line SAV EAV Switching line