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D-3 is an uncompressed composite digital video tape format introduced by Panasonic in 1991 to compete with Ampex's D-2. Like D-2, the composite video signal is sampled at four times the color subcarrier frequency, with eight bits per sample. Four channels of 48 kHz 16-20 bit PCM audio, and other ancillary data, are inserted during the vertical blanking interval.
Digitizing World has the high-end decks to playback and transfer D3 tapes to other modern formats like mp4, Apple ProRes, DVD, and Blu-ray. All work is done in house.