Digital Video
Digital video is a sort of video recording system that operates through a digital rather than analog, representation of the video signal. This generic term should not be confused with the name DV, which a certain type of digital video. Digital video tape, and then mostly on optical media, usually DVD is distributed. There are exceptions, such as cameras that record directly to DVD, Digital8 camcorders, the code> Digital Video cassettes traditional analog, and the latest JVC Everio G camcorders as digital video recording to your hard drive.
The words "Double" is "Room" and "cameras" in this article are used interchangeably.
Introduction
The cameras are in two different formats of image capture: interlaced and progressive scan. Interlaced cameras record the image in alternating series of lines: the odd lines are scanned and theneven lines are scanned, then the odd lines are scanned again, and so on. A series of odd or even lines is known as a "land" and coupling of two consecutive fields of opposite parity is also a frame.
A video camera with progressive scan digital recording each image separately, with the two fields are identical. Thus, interlaced video recorded twice as many fields per second, progressive video is when both the same number of images per farmSeconds. This is one reason that the film is a look hyper-real "as it draws a different image 60 times per second for film, 24 or 25 progressive frames per second, as opposed to records.
A progressive scan, such as Panasonic DVX100 cameras is generally desirable, because it shares similarities with the film. Both images are the result, in a scalable image sharper. You can take pictures at 24 frames per second, resulting in motionStrobe (blurring of the subject with fast movement occurs). Well, well, progressive scan cameras tend to be more expensive than their interlaced counterparts. (Note that while allowing the digital video format only 29.97 interlaced frames per second [or 25 for PAL], 24 frames per second progressive video displaying identical fields for each frame and capable of displaying 3 fields of an identical image for some frames. For a more detailed explanation,adamwilt.com see link).
Film stock as standard 16 mm and 35 mm to record 24 or 25 frames per second. For video, there are two standard frame rate: NTSC and PAL 30/1001 (shoot approximately 29.97) frames per second and 25 frames per second.
Digital video can be copied without any loss of quality. No matter how many generations of the digital source is copied, it is also clear that the original first generation of digitalFootage.
Digital video can be treated and non-linear editing and non-linear editing workstation, a device designed only for video editing and audio editing. Often they are analog and digital sources for imports, but are not intended to be anything other than video editing. Digital video can be done on a personal computer, which will be treated the right equipment and software. With a virtual assembly station, you can edit digital video, to place an order or sequence to followclips. Avid software and hardware is almost synonymous with professional NLE market, but Apple Final Cut Pro, Adobe Premiere, and similar programs are also very popular.
More videos and other published and are easily accessible, hardware and software at affordable prices. Even the big-budget movies like Cold Mountain, should be handled only in Apple Final Cut Pro non-linear editing software.
Regardless of the software, digital video is generally edited byEstablished with a lot of space. Digital video applications with standard DV / DVCPRO compression up to 250 megabytes per minute or 13 gigabytes per hour.
Digital video has a much lower cost 35mm film, like the bands can be viewed without local processing, and the group itself is very cheap (about $ 3 for 60 minutes in the stack of MiniDV tape in bulk, from December 2005) . In comparison, 35 millimeters film costs about $ 1,000 per minute, includingTransformation.
Digital video is out of Movie Maker. Digital television (including the most widely used quality HDTV) started in most developed countries is developed in the early 2000s. Digital video is used in modern mobile phones and video conferencing. Digital video is used for media distribution on the Internet, such as video streaming and peer-to-peer distribution of films.
Different types of compression exist for the transmission of digital video throughInternet and DVD. While DV video is compressed beyond its own codec while editing, file sizes that are virtually impossible to run on optical media or internet, with codecs such as Windows Media format, MPEG2, MPEG4, Real Media, the H.264 and Sorenson Media. Probably the most used formats to deliver video over the internet are MPEG4 and Windows Media, MPEG 2, and used almost exclusively for DVD, have aexceptional image quality with minimum size, but only to extract a high consumption of CPU.
Try 2005, the maximum resolution for digital video production, 33 million pixels (7680 x 4320) at 60 frames per second ( "DUHDV"), but it was only in special schools were laboratory [1]. The maximum speed is reached in cameras and industrial scientists who are capable of shooting video with 1024×1024 up to 1 million images per second,(for a short time, of course).
2006 lines and a global leader in Ultra-high-speed imaging.
According to the camera system in use for frequencies up to 200 images of 000 000 images per second are possible. The exposure time very short and the international context, are standard. Gated and intensified models are available. Other modules of the system Cordin provides ultra-high speed camera 1000 * 1000 pixels at full frame rate in color or black and white. Scan camera systemsscientific applications are available and designed with modern technology.
For broadband applications in the short, medium or infrared cameras provide different long-wave modes of Phoenix. The InGaAs, QWIP, InSb Detectors can acquire images up to 30 kHz in the range of wavelengths from 900 nm to 10.
Interfaces / Cable
Several interfaces have been specifically for the needs of uncompressed digital video-Handle (400 Mbit / s):
Serial Digital Interface
FireWire
High-Definition Multimedia Interface
Digital Visual Interface
Unified Display Interface
DisplayPort
Storage formats
Encoding
All popular sizes are listed below, PCM.
CCIR 601 used for broadcast stations
MPEG-4 for proper online distribution of large video
MPEG-2 used for DVDs and Super-VCD
MPEG-1 used for video CDs
H.261
H.263
H.264 alsoknown as MPEG-4 Part 10 or AVC as
Theora standardized but still developing. used for video on the Internet.
Tapes
Betacam SX, Betacam IMX, Digital Betacam
Called D1, D2, D3, D5, D9 (also known as Digital-S)
DV, Mini DV – used in consumer devices today most
DVCAM, DVCPRO – in the operations of professional broadcast
Digital8 —
Hard Drives
Video CD (VCD)
DVD
HD-DVD
Blu-ray Disc
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