Definição do conceito
[POR] D-1 (video) |
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[ENG] D1 (videocassette) | D1 (1987 – 1990s) | Sony’s D1 was the first digital videotape format, introduced in 1987. | D1 stores uncompressed digitised component video, with very high picture quality and was most popular in high-end graphic and animation production despite being very expensive. It uses ¾-inch tape, with a maximum record time of 94 minutes, and 460 lines of resolution. | Sony’s Digital Betacam format, introduced in 1993, also used component video and became the de facto standard-definition broadcast format due to its affordability. But even after Digital Betacam was wide spread, the pure component, uncompressed nature of D1 was specified by major studios and commercial producers as the format of choice until HD took effect. | SOURCE : MUSEUM OF OBSOLETE MEDIA. Data Base. Available at : https://obsoletemedia.org/sony-d1/ Accessed : 24 nov. 2022
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[ENG] | D-1 | D-1 (Sony) | [D-1 (video)] | D-1 or 4:2:2 Component Digital is an SMPTE digital recording video standard, introduced in 1986 through efforts by SMPTE engineering committees. It started as a Sony and Bosch - BTS product and was the first major professional digital video format. SMPTE standardized the format within ITU-R 601 (orig. CCIR-601), also known as Rec. 601, which was derived from SMPTE 125M and EBU 3246-E standards. | FORMAT | D-1 or 4:2:2 D-1 (1986) was a major feat in real time, broadcast quality digital video recording. It stores uncompressed digitized component video, encoded at Y´CbCr 4:2:2 using the CCIR 601 raster format with 8 bits, along with PCM audio tracks as well as timecode on a 3/4 inch (19 mm) videocassette tape (though not to be confused with the ubiquitous 3/4-inch U-Matic/U-Matic SP cassette). | The uncompressed component video used enormous bandwidth for its time: 173 Mbit/sec (bit rate).[citation needed] The maximum record time on a D-1 tape is 94 minutes. | SOURCE : D-1 (Sony) in: Wikipedia. Available at : https://en.wikipedia.org/wiki/D-1_(Sony) Accessed : 25 nov. 2022
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