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Information about Digital S

D-9 or Digital S as it was originally known, is a professional digital videotape format created by JVC in 1995. It is a direct competitor to Digital Betacam. Its name was changed to D-9 in 1999 by the SMPTE.[1] It is used mostly inside Europe and Asia, though has seen some use in the US, most notably by the FOX news channel.[2]

Technical details

D-9 uses a tape shell of the VHS formfactor, but the tape itself uses a much higher quality metal particle formulation. The recording system is digital and for video uses DV compression at a 50 Mbit/s bitrate. Video is recorded in 4:2:2 component format at a variety of standard definition resolutions, in either 4:3 or 16:9 aspect ratios. Audio is recorded as 16bit/48 kHz pcm with up to 4 separate channels.[3]

HD recording

For HD recording, JVC developed an extension to D-9 called D-9 HD. D-9 HD uses twice the number of recording heads to record a 100Mbit/s video bitstream at resolutions of 720p60, 1080i60 and 1080p24. This variant is also able to record 8 channels of PCM audio at 16bit/48 kHz. This is ideal for mastering to AC3 or other multichannel audio compression formats used for broadcasting. The higher data rate means that the recording time of any given tape is cut in half.[4]

Video quality

Video quality is generally very high; at standard definition resolutions, quality is higher than that of Betacam SP and comparable to Digital Betacam. [5] At HD resolutions, based on specifications, quality is higher than HDCAM but lower than HDCAM SR; unfortunately, no subjective tests have been done comparing these formats.

Additional information

Although D-9 uses the same video codec (DV) as MiniDV, the video bitrate of D-9 is significantly higher than that of the "pro-sumer" format. DVCPRO achieves bitrate parity with D-9 and D-9 HD, but has a slower tape speed, making it less reliable. Some of the D-9 studio gear is capable of recording with pre-read and is provided with 4 channel audio like digital betacam. SDI interfaces are also provided. There is only one dockable recorder for docking to other camera's and that is the JVC BR-D40.

References

1. ^ "D-9: Introduction to the format", Short introduction to the D-9 format. Accessed October 13, 2007.
2. ^ "D-9 in action worldwide", Shows areas where D-9 is in use. Accessed October 13, 2007.
3. ^ "D-9 technical specifications", Displays general D-9 technical specifications. Accessed October 13, 2007.
4. ^ "D-9 HD Technical Specifications", Displays general D9-HD specifications. Accessed October 13, 2007.
5. ^ "JVC Professional Japan", cites SMPTE/EBU taskforce results. Accessed October 13, 2007.

External links

See also

Betacam is a family of half-inch professional videotape products developed by Sony from 1982 onwards. In casual use, "Betacam" singly is often used to refer to a Betacam camcorder, a Betacam tape, or a Betacam video recorder.
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Video Home System

Top view of VHS cassette with ruler for scale
Media type: Video recording media
Encoding: FM on magnetic tape
Developed by: JVC (Japan Victor Company)
Usage: Audio/Video Storage

The Video Home System [1]
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bitrate (sometimes written bit rate, data rate or as a variable R or fb) is the number of bits that are conveyed or processed per unit of time. Bit rate is synonymous to data rate and digital bandwidth.
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Chroma subsampling is the practice of implementing more resolution for the (quantity representative of) luminance than the (quantity representative of) color. It is used in many video encoding schemes (both analog and digital) and also in JPEG encoding.
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Component may refer to:
  • Electronic components, the constituents of electronic circuits.
  • Component ingredient, the main ingredient in a dish.
  • Component video, a type of analog video information that is transmitted or stored as two or more separate signals

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The aspect ratio of a two-dimensional shape is the ratio of its longer dimension to its shorter dimension. It is also applied to two characteristic dimensions of a three-dimensional shape, especially for the longest and shortest 'axes' or for symmetrical objects (e.g.
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Victor Company of Japan, Limited
日本ビクター株式会社

Corporation TYO: 6792
Founded Yokohama, Japan (1927)
Headquarters Yokohama, Japan

Key people Masahiko Terada, President
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Dolby Digital is the marketing name for a series of lossy audio compression technologies developed by Dolby Laboratories.

Versions

Dolby Digital includes several similar technologies, which include Dolby Digital, Dolby Digital EX, Dolby Digital Live, Dolby Digital Surround
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Standard-definition television or SDTV refers to television systems that have a resolution that meets standards but not considered either enhanced definition or high definition.
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HDCAM, introduced in 1997, is an HD version of Digital Betacam, using an 8-bit DCT compressed 3:1:1 recording, in 1080i-compatible downsampled resolution of 1440×1080, and adding 24p and 23.976 PsF modes to later models.
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HDCAM, introduced in 1997, is an HD version of Digital Betacam, using an 8-bit DCT compressed 3:1:1 recording, in 1080i-compatible downsampled resolution of 1440×1080, and adding 24p and 23.976 PsF modes to later models.
..... Click the link for more information.
Digital Video (DV) is a digital video format launched in 1994, and, in its smaller tape form factor MiniDV, has since become a standard for home and semiprofessional video production; it is sometimes used for professional purposes as well, such as filmmaking and electronic
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October 13 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events

  • 409 - Vandals and Alans crossed the Pyrenees and appeared in Hispania.

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20th century - 21st century - 22nd century
1970s  1980s  1990s  - 2000s -  2010s  2020s  2030s
2004 2005 2006 - 2007 - 2008 2009 2010

2007 by topic:
News by month
Jan - Feb - Mar - Apr - May - Jun
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October 13 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events

  • 409 - Vandals and Alans crossed the Pyrenees and appeared in Hispania.

..... Click the link for more information.
20th century - 21st century - 22nd century
1970s  1980s  1990s  - 2000s -  2010s  2020s  2030s
2004 2005 2006 - 2007 - 2008 2009 2010

2007 by topic:
News by month
Jan - Feb - Mar - Apr - May - Jun
..... Click the link for more information.
October 13 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events

  • 409 - Vandals and Alans crossed the Pyrenees and appeared in Hispania.

..... Click the link for more information.
20th century - 21st century - 22nd century
1970s  1980s  1990s  - 2000s -  2010s  2020s  2030s
2004 2005 2006 - 2007 - 2008 2009 2010

2007 by topic:
News by month
Jan - Feb - Mar - Apr - May - Jun
..... Click the link for more information.
October 13 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events

  • 409 - Vandals and Alans crossed the Pyrenees and appeared in Hispania.

..... Click the link for more information.
20th century - 21st century - 22nd century
1970s  1980s  1990s  - 2000s -  2010s  2020s  2030s
2004 2005 2006 - 2007 - 2008 2009 2010

2007 by topic:
News by month
Jan - Feb - Mar - Apr - May - Jun
..... Click the link for more information.
October 13 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events

  • 409 - Vandals and Alans crossed the Pyrenees and appeared in Hispania.

..... Click the link for more information.
20th century - 21st century - 22nd century
1970s  1980s  1990s  - 2000s -  2010s  2020s  2030s
2004 2005 2006 - 2007 - 2008 2009 2010

2007 by topic:
News by month
Jan - Feb - Mar - Apr - May - Jun
..... Click the link for more information.
Betacam is a family of half-inch professional videotape products developed by Sony from 1982 onwards. In casual use, "Betacam" singly is often used to refer to a Betacam camcorder, a Betacam tape, or a Betacam video recorder.
..... Click the link for more information.
Betacam is a family of half-inch professional videotape products developed by Sony from 1982 onwards. In casual use, "Betacam" singly is often used to refer to a Betacam camcorder, a Betacam tape, or a Betacam video recorder.
..... Click the link for more information.
HDCAM, introduced in 1997, is an HD version of Digital Betacam, using an 8-bit DCT compressed 3:1:1 recording, in 1080i-compatible downsampled resolution of 1440×1080, and adding 24p and 23.976 PsF modes to later models.
..... Click the link for more information.


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