D6 HDTV VTR
Encyclopedia
D6 HDTV VTR is SMPTE videotape
Videotape
A videotape is a recording of images and sounds on to magnetic tape as opposed to film stock or random access digital media. Videotapes are also used for storing scientific or medical data, such as the data produced by an electrocardiogram...

 standard. A D6 VTR can record and playback HDTV video
Video
Video is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing scenes in motion.- History :...

 uncompressed. The only D6 VTR product is the Philips
Philips
Koninklijke Philips Electronics N.V. , more commonly known as Philips, is a multinational Dutch electronics company....

, now Thomson
Thomson SA
Technicolor SA , formerly Thomson SA and Thomson Multimedia, is a French international provider of solutions for the creation, management, post-production, delivery and access of video, for the Communication, Media and Entertainment industries. Technicolor’s headquarters are located in Issy les...

's Grass Valley
Grass Valley (company)
Grass Valley, previously known as Grass Valley Group, is a privately held company based in California, USA. Grass Valley produces technology for the video and broadcast industry. On January 29, 2009, Thomson announced its intention to sell the Grass Valley business unit...

's Media Recorder, model DCR 6024, also called the D6 Voodoo VTR. The VTR was a joint project between Philips Digital Video Systems of Germany and Toshiba
Toshiba
is a multinational electronics and electrical equipment corporation headquartered in Tokyo, Japan. It is a diversified manufacturer and marketer of electrical products, spanning information & communications equipment and systems, Internet-based solutions and services, electronic components and...

 in Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. The Tape deck module was designed and made by Philips in Weiterstadt
Weiterstadt
Weiterstadt is a town in the Darmstadt-Dieburg district, in Hesse, Germany. It is situated approx. 6 km northwest of Darmstadt.....

, Germany
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

. (formerly Bosch Fernseh). and the Digital
Digital
A digital system is a data technology that uses discrete values. By contrast, non-digital systems use a continuous range of values to represent information...

 Processor module designed and made by Toshiba. Since there is no data compression
Data compression
In computer science and information theory, data compression, source coding or bit-rate reduction is the process of encoding information using fewer bits than the original representation would use....

, after 20 tape copies of multi generations there is no noticeable loss of quality. As a very high-end, costly system about 70 were sold to high-end post houses
Post-production
Post-production is part of filmmaking and the video production process. It occurs in the making of motion pictures, television programs, radio programs, advertising, audio recordings, photography, and digital art...

 from about 2000 to 2005. The VTR had a Data Record option. The Data Module could record and play back 2k DPX
DPX
Digital Picture Exchange is a common file format for digital intermediate and visual effects work and is an ANSI/SMPTE standard...

 files at 6 frames per second over a HIPPI
HIPPI
HIPPI is a computer bus for the attachment of high speed storage devices to supercomputers. It was popular in the late 1980s and into the mid-to-late 1990s, but has since been replaced by ever-faster standard interfaces like SCSI and Fibre Channel.The first HIPPI standard defined a 50-wire...

 connection. The VTR could come in a data only model, or with a switch module, so the record deck could be used for both video and data recording. The tape deck was also sold stand alone as a Giga Bit Recorder to record and playback raw data.

Specs

  • Tape format D-6 19 mm tape cassette housing, SMPTE 277/278M
  • The tape cassette housing looks like a D1
    D1 (Sony)
    D-1 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.- Format :...

     or D2
    D2 (video format)
    D-2 is a professional digital recording videocassette format created by Ampex and other manufacturers through a standards group of the Society of Motion Picture and Television Engineers and introduced at the 1988 NAB convention as a lower-cost alternative to the D-1 format...

     cassette, but these would be rejected by the VTR.
  • Tape is a Metal Particle tape, magnetic tape
    Magnetic tape
    Magnetic tape is a medium for magnetic recording, made of a thin magnetizable coating on a long, narrow strip of plastic. It was developed in Germany, based on magnetic wire recording. Devices that record and play back audio and video using magnetic tape are tape recorders and video tape recorders...

  • Scanner diameter 96 mm, a Helical scan
    Helical scan
    Helical scan is a method of recording high bandwidth signals onto magnetic tape. It is used in reel-to-reel video tape recorders, video cassette recorders, digital audio tape recorders, and some computer tape drives....

  • Track pitch: 22 um
  • D6 Tape thickness 11 um
  • Head to tape speed ~46 m/s
  • Tape speed ~497 mm/s
  • Records and playback of 1 Gbit/s uncompressed data.

.
  • Uses cassette sizes L – M – S
  • Recording time:
    • Small type 8 minutes
    • Med. type 28 minutes
    • Large type 64 minutes

  • Helical scan
    Helical scan
    Helical scan is a method of recording high bandwidth signals onto magnetic tape. It is used in reel-to-reel video tape recorders, video cassette recorders, digital audio tape recorders, and some computer tape drives....

     Record heads
    Recording head
    A recording head is the physical interface between a recording apparatus and a moving recording medium. Recording heads are generally classified according to the physical principle that allows them to impress their data upon their medium...

     2 clusters of 8 (0/180) total of 16
  • Play heads 2 clusters of 8 (0/180) Total of 16
  • Erase heads 2 (0/180)
    • Yes, that is a total of 34 heads on the scanner.

  • Video Error correction Reed Solomon code, 2D

  • Longitudinal tracks three: Control track, Timecode and, Audio
    Sound
    Sound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.-Propagation of...

     cue

  • Playback Slow motion +/- ¼ and with a video visible search mode

  • HDTV Video Signal Formats (SMPTE 274M)
    • 1920 x 1080 @ 24p
    • 1920 x 1080 @ 23.976p
    • 1920 x 1080 @ 25p
  • Progressive modes DTV
    • 1920 x 1080 @ 24sF
    • 1920 x 1080 @ 23.976sF
    • 1920 x 1080 @ 25sF ”segmented frame” modes
    • 1920 x 1080 @ 60i
    • 1920 x 1080 @ 59.94i
    • 1920 x 1080 @ 50i 2:1 interlace modes
  • The unit can cross play some formats

  • Sampling Frequency
    Sampling rate
    The sampling rate, sample rate, or sampling frequency defines the number of samples per unit of time taken from a continuous signal to make a discrete signal. For time-domain signals, the unit for sampling rate is hertz , sometimes noted as Sa/s...

     4:2:2:
    • Luminance
      Luminance
      Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square...

       Y 74.25 MHz and 74.25/1.001 = 74.1758 MHz
    • Chrominance
      Chrominance
      Chrominance is the signal used in video systems to convey the color information of the picture, separately from the accompanying luma signal . Chrominance is usually represented as two color-difference components: U = B' − Y' and V = R' − Y'...

       37.125 MHz and 37.125/1.001 = 37.0879 MHz

  • Quantization
    Quantization (signal processing)
    Quantization, in mathematics and digital signal processing, is the process of mapping a large set of input values to a smaller set – such as rounding values to some unit of precision. A device or algorithmic function that performs quantization is called a quantizer. The error introduced by...

    :
    • Y-Luminance = 10 Bits 24/25 fr/sec modes and 8 Bits 30 fr/sec modes
    • Chroma = 8 Bits

  • AUDIO:
    • 30 Frames System: 10 Channel, 5 stereo pairs
    • 24/25 Frames System: 12 Channels, 6 stereo pairs
    • Audio standard AES/EBU
      AES/EBU
      AES3 is the standard used for the transport of digital audio signals between professional audio devices. It is also known as AES/EBU and is published by the Audio Engineering Society and as part of IEC 60958. It was developed by the AES and the European Broadcasting Union and first published in...

    • Sampling frequency 48 kHz
    • Quantization, digital I/O 20 or 24 bit

Worldwide userlist

Europe:
  • Augustus Italy
  • Cinefekt
  • Digital Film Lab Copenhagen, Denmark www.digitalfilmlab.com
  • Digital Images Halle, Germany
  • Digital Film Finland Helsinki, Finland www.softmodel.fi
  • Eclair Épinay, France
  • Frame Image Helsinki, Finland
  • Frithiof Telecine Stockholm, Sweden
  • Generator Post Finland
  • Geyer video Berlin, Germany
  • Interactive group Milan, Italy
  • LTC Scanlab France
  • Listo Vienna, Austria
  • Mars Motel Sweden
  • Molinare Spain
  • Philips Research Netherlands
  • Rudas Germany
  • Sertek Turkey
  • Short Cut Denmark www.filmteknikk.no
  • Epoka ltd Poland www.epoka.tv
  • EBH Polska, Warsaw, Poland
  • Taurus Media Technik Munich, Germany
  • VCC Hamburg, Germany
  • VDM Courbevoie, France www.vdm.fr
  • Video Copy Company – VCC Berlin, Germany www.vcc.de
  • VTR London
  • Warehouse Denmark


Americas
  • Casablanca Finish Ltda São Paulo, Brazil
  • Command Post Toronto, Canada www.compt.com
  • Complete Post Hollywood, CA www.completepost.com
  • Discreet Montreal, Canada
  • Digital Images Los Angeles, CA
  • Galicia Ramirez y Asoc. Mex. Mexico
  • Industry Light and Magic California
  • IVC, International Video Conversions Burbank, CA www.ivchd.com
  • Laser Pacific Hollywood, CA www.laserpacific.com
  • Library of Congress Washington DC
  • Mega Brazil
  • Rhinoceros Editorial & Post New York, NY
  • SMA Video New York, NY www.smavid.com
  • Technique Burbank, CA www.technicolor.com
  • Vid-Film California www.vidfilm.com


Asia/Pacific
  • Shaw-Brothers Hong Kong

Ext. Links and Ref.

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK