World Library  
Flag as Inappropriate
Email this Article

D-3 (video)

Article Id: WHEBN0001504005
Reproduction Date:

Title: D-3 (video)  
Author: World Heritage Encyclopedia
Language: English
Subject: Videotape, HD NVD, Laserfilm, SelectaVision, EIAJ-1
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

D-3 (video)

D-3 videotape
A D-3 videocassette
Media type Magnetic tape
Encoding NTSC, PAL
Read mechanism Helical scan
Write mechanism Helical scan
Standard Interlaced video
Developed by NHK
Usage Television production
Panasonic AJ-D350 D3 VCR

D-3 is an uncompressed composite digital video videocassette format invented at NHK, and introduced commercially by Panasonic in 1991 to compete with Ampex's D-2. It uses half-inch metal particle tape at 83.88 mm/s (compare to D-2's 19 mm and 131.7 mm/s). Like D-2, the composite video signal is sampled at four times the color subcarrier frequency, with eight bits per sample. Four channels of 48 kHz 16-20 bit PCM audio, and other ancillary data, are inserted during the vertical blanking interval. The aggregate net (error corrected) bitrate of the format is 143 Mbit/s, and because the codec is lossless, it has been used in data applications. Camcorders were available which used this format, and are to date the only digital tape camcorders to use a lossless encoding scheme. The D-5 format, introduced in 1993 by Panasonic and presently (2006) marketed as D-5 HD, uses the D-3 transport and tape running at roughly double D-3 speed. The D-3 transport in turn is derived from the MII transport. D-3/D-5 tapes come in small (161 mm X 96 mm X 25 mm), medium (212 mm X 124 mm X 25 mm), and large (296 mm X 167 mm X 25 mm) cassettes, with format-specific recognition holes. Maximum D-3 runtimes (in the Fujifilm lineup) are 50, 126, and 248 minutes respectively.

External links

  • Technical Glossary of Common Audiovisual Terms: D3
  • International Association of Broadcasting Manufacturers Technical Reference on Video Tape Recording Formats, January 2000
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.