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Video Recording

Video Recording. Analog Video. Video Recording. Color space. Video Recording. Analog Composite Component S-Video Digital format UnCompressed (SDI) Compressed (MPEG). Video Recording. Magnetic Tape. Magnetic coating on Plastic Iron Oxide coating Chromium di-oxide. Analog Formats.

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Video Recording

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  1. Video Recording • Analog Video

  2. Video Recording • Color space

  3. Video Recording • Analog • Composite • Component • S-Video • Digital format • UnCompressed (SDI) • Compressed (MPEG)

  4. Video Recording • Magnetic Tape • Magnetic coating on Plastic • Iron Oxide coating • Chromium di-oxide

  5. Analog Formats • Tape Heads • Recording Heads – Soft Iron/Ferrite • Playback Heads • Erase Heads

  6. Video Recording • Tape Head

  7. Video Recording Magnetic Domain

  8. Video Recording Magnetic Domain

  9. Video Recording Magnetic Recording

  10. Video Recording Hystersis

  11. Video Recording

  12. Analog Formats • Analog • VHS • Ampex • U-Matic • Betacam

  13. Video Recording • Tape Speed • Quadruplex • Helical span • Speed of the tape • Audio 4.75 cm/s • Video 10 m/s

  14. Video Recording Ampex VR2000

  15. Video Recording

  16. Video Recording

  17. Video Recording

  18. Video Recording • Control Track • Each frame – Synchronize scan & tape speed • Dropouts – Defective magnetic particles • Discontinuous track • Generation loss

  19. Video Recording Digital Picture formats Uncompressed BMP TGA TIFF Compressed JPEG GIF GIF (Animated)

  20. Video Recording

  21. Video Recording • Computer based Recording • Uncompressed • Compressed • DV • MPEG 1, 2 • Mov • AVI • Mpeg4 • WMV

  22. Video Recording • Digital Video • SDI • DV • MPEG • WMV • Flash

  23. Video Recording • DV Format (1995) • Intraframe, Interlaced • DCT • 13.5:6.75 • 720 X 576 (704 active) • 4:1:1 / 4:2:0 • 16bit/12bit Linear/Nonlinear PCM Audio • DIF (Digital Interface Format) • 80byte, 150 blocks (Sequence), 10-12 seq a frame • AVI, MOV, MxF

  24. Chroma Sub-sampling

  25. Video Recording • DVCPRO (1995) Panasonic • Locked Audio • 4:1:1 • 25Mbps • DVCPRO 50 (1997) • Locked Audio • 4:2:2 • 50Mbps

  26. Video Recording • DVCAM (1996) Sony • Locked Audio

  27. Video Recording • DigiBeta • DCT Component Video • 10bit YUV 4:2:2 • 90Mbps, 4 Uncompressed 20bit PCM Audio • SDI

  28. Video Recording • DigiBeta SX (1996) • Digital version of Betacam SP • MPEG-2 4:2:2 • 22Mbps (approx), 4 Uncompressed 16bit PCM Audio • Alternate frames are I-frame & B frame • Cassettes Yellow

  29. Video Recording • MPEG IMX (2001) • MPEG-2 4:2:2 • 30, 40, 50Mbps, 8 Uncompressed 16bit PCM Audio • Intraframe • SDTI • Muted green tapes

  30. Video Recording • HDCAM / HDCAM SR (1997) • 1080i • 8bit DCT, 144Mbps • 1440 X 1080 -> 1920 X 1080 • 4 AES 20bit

  31. Video Recording • HDCAM SR (2003) • 10bit 4:2:2 or 4:4:4 • MPEG4 - Part2 • 1920 X 1080 • 12 Audio Channels, 24bit • SDTI • Muted green tapes

  32. Video Recording • D1 (1986) ¾” • Uncompressed digital component video • Y’CbCr – 4:2:2, 8bit • D1 • Composite video • D5 HD (Panasonic) • 10bit

  33. Video Recording • Advantages of Computer based Recording • Cassette-free • Network sharing • Editing friendly

  34. Video Recording • Editing • Linear Editing • Non Linear • Hardware based • Software based • Codec

  35. Video Recording • Non Linear Editing • Windows Movie maker • Avid • Velocity • Adobe Premier • Final Cut Pro

  36. Video Recording

  37. Video Recording • Advantages of Non Linear Editing • Record Once • Random Access • EDL • Export

  38. Video Recording • System Requirements • High end computer hardware • Good quality video card • Huge Hard Disk • Throughput

  39. Video Recording • NLE Storage • Local • NAS • SAN

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