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Video Technology and Image Processing. ... To record and playback analogue video in the same way as we do analogue audio, the tape would need to move at about 5-10 m/sec depending on the required picture quality. ... The problem in recording video signals onto magnetic tape is that a video signal has enormous bandwidth in comparison to an audio signal. ... The result is that the recording heads execute a helical path relative to the movement of the tape, and thereby write the video information at high speed as a series of 32-micrometer wide diagonal stripes (See Fig 2). ... Shows the route taken by the Video tape during recording/playback
Fig 2. ...
Principals and operation of Digital Betacam (DigiBeta):
Digital Betacam (Digibeta) is a component video format. By definition this means colour video represented by three separate signals (luminance and two colour difference signals). ... Employing 10-bit video sampling with slight data compression, DigiBeta contains 4 channels of 20 bit uncompressed digital audio, sampled at 48 kHz. ... The cameras have proved to be robust and reliable and give the cameraman an incredible amount of control over the final image. ...
The compression system used is very mild at only 2:1; this helps maintain the original image quality even after many generations or layers of special effects. ... The tapes manufactured with D2 technology are similar in appearance to VHS videotapes but use metal-particle tape and boast a storage capacity of approximately 50GB per cartridge. ... It uses a high level of compression to enable 60 minutes of high quality video and audio to be stored on a small, highly portable ¼ inch cassette tape.
Approximate Word count = 1348
Approximate Pages = 5.4
(250 words per page double spaced)
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