D1 (Sony)

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SMPTE digital video standard and Sony product D1 format was the first major professional digital video format, introduced in 1986 through efforts by SMPTE engineering committees.

D1 stored uncompressed digitized component video, encoded at Y'CbCr 4:2:2 using the CCIR 601 raster format, along with PCM audio tracks as well as timecode on a 19 mm (3/4") cassette tape. Uncompressed component video uses enormous bandwidth, and a simpler D2 system soon followed. The maximum record time on a D1 tape is 94 minutes.

D1 was notoriously expensive and the equipment required very large infrastructure changes in facilities which upgraded to this format. Early D1 operations were plagued with difficulties, though the format quickly stabilized and was renowned for its superlative image quality.

D1 is still in some usage as of 2003, and many of the technologies introduced with this format are still common to more recent digital videotape formats.

Panasonic's D5 format has similar specifications, but was introduced much later.

D1 resolution is 720×480 for NTSC systems and 720 × 576 for PAL systems.

[edit] References

Grotticelli, Michael, ed. (2001). American Cinematographer Video Manual. The ASC Press, Hollywood, CA. ISBN 0-935578-14-5

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