A digital video tape recording format working to the ITU-R BT.601, 4:2:2 standard using 8-bit sampling. The tape is 19 mm wide and allows up to 94 minutes to be recorded on a cassette.

Introduced in 1986, Sony’s D1 VTR set a benchmark as it was the first uncompressed component digital tape format. It offered very high quality, only small degradation over many re-record generations and, with its high chrominance bandwidth, allowed excellent chroma keying in post production. Despite the advantages, D1 use was limited by high cost and is rarely found today. However the term ‘D1’ is still occasionally used to imply uncompressed component digital recording – ‘D1’ quality.

See also: D2, DVTR