Video Recording Analog Video Video Recording Color space.

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Presentation transcript:

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 Tape Heads  Recording Heads – Soft Iron/Ferrite  Playback Heads  Erase Heads

Video Recording Tape Head

Video Recording Magnetic Domain

Video Recording Magnetic Domain

Video Recording Magnetic Recording

Video Recording Hystersis

Video Recording

Analog Formats Analog  VHS  Ampex  U-Matic  Betacam

Video Recording Tape Speed  Quadruplex  Helical span  Speed of the tape oAudio 4.75 cm/s oVideo 10 m/s

Video Recording Ampex VR2000

Video Recording

Control Track  Each frame – Synchronize scan & tape speed  Dropouts – Defective magnetic particles  Discontinuous track  Generation loss

Video Recording Digital Picture formats  Uncompressed oBMP oTGA oTIFF  Compressed oJPEG oGIF oGIF (Animated)

Video Recording

Computer based Recording  Uncompressed  Compressed oDV oMPEG 1, 2 oMov oAVI oMpeg4 oWMV

Video Recording Digital Video oSDI oDV oMPEG oWMV oFlash

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) o80byte, 150 blocks (Sequence), seq a frame oAVI, MOV, MxF

 Chroma Sub-sampling

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

Video Recording DVCAM (1996) Sony  Locked Audio

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

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

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

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

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

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

Video Recording Advantages of Computer based Recording  Cassette-free  Network sharing  Editing friendly

Video Recording Editing  Linear Editing  Non Linear oHardware based oSoftware based oCodec

Video Recording Non Linear Editing  Windows Movie maker  Avid  Velocity  Adobe Premier  Final Cut Pro

Video Recording

Advantages of Non Linear Editing  Record Once  Random Access  EDL  Export

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

Video Recording NLE Storage  Local  NAS  SAN

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