vanguy
发表于 2005-3-5 13:14:24
Re:D1 的全称 那位大虾指导！！！！！！！！！
D1=Digital Video Format 1(Digital 1) A 3/4" (19mm) broadcast-quality component digital videotape format that records uncompressed frames in the ITU-R BT.601 standard. Using costly tape decks and metal-particle cassettes, D1 uses 1MB of storage for each frame and 2GB of storage per minute. At 30 fps, it requires a 27MB/sec transfer rate, as there is a small amount of compression that takes place. See ITU-R BT.601 and D5.Sony´s D1 format was the first major professional digital video format, introduced in 1987.D1 stored uncompressed digitized component video, encoded at YUV 4:2:2 using the CCIR 601 raster format, along with PCM audio tracks as well as timecode. Uncompressed component video uses enormous bandwidth, and a simpler D2 system soon followed.It used a 19mm (3/4") cassette tape format, and also stores PCM audio tracks as well as timecode.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.
sl_shan
发表于 2006-3-9 21:38:14
re:笑云君,真人!请经常露相啊!
明白
tianwang
发表于 2006-3-11 00:55:38
re:笑云君,真人!请经常露相啊!
高手就是高手。
项华斌
发表于 2006-11-1 06:40:43
re:老管好厉害呀．在下佩服．
老管好厉害呀．在下佩服．
dqbyt
发表于 2007-2-15 06:23:22
re:学习中
学习中
xieweihai
发表于 2008-4-8 08:06:04
re:又学到新知道了
又学到新知道了