Video Recording

• Analog Video

Video Recording

• Color space

Video Recording

• AnalogCompositeComponentS-Video

• Digital formatUnCompressed (SDI)Compressed (MPEG)

Video Recording

• Magnetic Tape Magnetic coating on Plastic

Iron Oxide coating

Chromium di-oxide

Analog Formats

• Tape HeadsRecording Heads – Soft Iron/FerritePlayback 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

• AnalogVHSAmpexU-MaticBetacam

Video Recording

• Tape SpeedQuadruplexHelical spanSpeed of the tape

o Audio 4.75 cm/so Video 10 m/s

Video Recording

Ampex VR2000

Video Recording

Video Recording

Video Recording

Video Recording

• Control TrackEach frame – Synchronize scan & tape

speedDropouts – Defective magnetic particlesDiscontinuous trackGeneration loss

Video Recording

• Digital Picture formatsUncompressed

o BMPo TGAo TIFF

Compressedo JPEGo GIFo GIF (Animated)

Video Recording

Video Recording

• Computer based RecordingUncompressed Compressed

o DVo MPEG 1, 2o Movo AVIo Mpeg4o WMV

Video Recording

• Digital Videoo SDIo DVo MPEGo WMVo Flash

Video Recording

• DV Format (1995) Intraframe, InterlacedDCT13.5:6.75720 X 576 (704 active)4:1:1 / 4:2:016bit/12bit Linear/Nonlinear PCM AudioDIF (Digital Interface Format)

o 80byte, 150 blocks (Sequence), 10-12 seq a frame

o AVI, MOV, MxF

Chroma Sub-sampling

Video Recording

• DVCPRO (1995) PanasonicLocked Audio4:1:125Mbps

• DVCPRO 50 (1997)Locked Audio4:2:250Mbps

Video Recording

• DVCAM (1996) SonyLocked Audio

Video Recording

• DigiBetaDCT Component Video10bit YUV 4:2:290Mbps, 4 Uncompressed 20bit PCM

AudioSDI

Video Recording

• DigiBeta SX (1996)Digital version of Betacam SPMPEG-2 4:2:222Mbps (approx), 4 Uncompressed 16bit

PCM AudioAlternate frames are I-frame & B frameCassettes Yellow

Video Recording

• MPEG IMX (2001)MPEG-2 4:2:230, 40, 50Mbps, 8 Uncompressed 16bit

PCM Audio IntraframeSDTIMuted green tapes

Video Recording

• HDCAM / HDCAM SR (1997)1080i8bit DCT, 144Mbps1440 X 1080 -> 1920 X 10804 AES 20bit

Video Recording

• HDCAM SR (2003)10bit 4:2:2 or 4:4:4MPEG4 - Part21920 X 108012 Audio Channels, 24bitSDTIMuted green tapes

Video Recording

• D1 (1986) ¾”Uncompressed digital component video Y’CbCr – 4:2:2, 8bit

• D1Composite video

• D5 HD (Panasonic)10bit

Video Recording

• Advantages of Computer based Recording Cassette-free Network sharingEditing friendly

Video Recording

• EditingLinear Editing Non Linear

o Hardware basedo Software basedo Codec

Video Recording

• Non Linear EditingWindows Movie makerAvidVelocityAdobe PremierFinal Cut Pro

Video Recording

Video Recording

• Advantages of Non Linear EditingRecord OnceRandom AccessEDLExport

Video Recording

• System RequirementsHigh end computer hardwareGood quality video cardHuge Hard DiskThroughput

Video Recording

• NLE StorageLocalNASSAN