D1

D1, D01, D.I, D.1 or D-1 can refer to:

Science and technology

and also :

D1 (building)

D1 (meaning Dubai Number One) is an 80 floor, 284 m (932 ft) tall residential skyscraper, under construction in Dubai, United Arab Emirates. D1 will feature skyrise lounge, private cinema, indoor pool, gymnasium and concierge services. D1 is adjacent to the Palazzo Versace Dubai.

Design

The tower has a total structural height of 284 m (932 ft), but the design originally included a spire that would bring the total height to 350 m (1,150 ft). Construction of D1 is expected to be completed in 2013.

Similarities with Q1

The tower is the sister of the world's fifth tallest residential building, Q1 in Gold Coast, Australia. Although they will look similar, D1 will be structurally shorter, whilst having a taller roof height. This is because Q1 has a roof height of 275 m (902 ft) with a spire increasing the total height to 323 m (1,060 ft).

The appearance of D1 is also quite distinct from Q1. The facades of D1, designed by Innovarchi (directors Ken McBryde and Stephanie Smith) enhance the form of the tower and emphasize the sheer nature of the layered glass curtain wall. The primary facades are conceived as a series of layers to protect against the harsh environment. The timber canopy around the base, is inspired by the craft of Dhow trading boat construction that used to occur on the site. Installation of the canopy is expected from September 2012. The undulating timber structure provides a shaded threshold between the air conditioned internal spaces, bright and hot exterior. It also acts as a moderator between three surrounding scales: the High Speed Freeway / Urban Landmark Scale; the Precinct Scale and the Human Scale.

D-1 (Sony)

D-1 or 4:2:2 Component Digital is a 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, 173 Mbit/sec (bit rate), for its time. The maximum record time on a D-1 tape is 94 minutes.

Because of the uncompromising picture quality - component processing and uncompressed recording, D-1 was most popular in high-end graphic and animation production - where multiple layering had previously been done in short run times via hard drives (Quantel Harry, Henry, Harriet, Hal or Abekas DDR) or via multiple analog machines running at once. Hard drives in the 1980s that stored broadcast-quality video would typically only hold 30 seconds to a few minutes of space, yet the systems that made them work could cost $500,000. By contrast, the D-1 machine allowed 94 minutes of recording on a $200 cassette.