DVD Format Unification

8 December, 1995

(The following is the text of the statement anouncing final agreement on the DVD format, as released by the companies supporting the format, on 8 December 1995.)


Since September 15, when a general agreement was reached on a common format for the high-density optical disc, the SD and MMCD groups have continued discussions to finalize details of the format. Today, they announced an agreement on the final details of the new format.

This technical breakthrough in digital storage was reached by Toshiba, Matsushita, Sony, Philips, Time Warner, Pioneer, JVC, Hitachi and Mitsubishi Electric. DVD technology promises important benefits for consumers, the film and computer industries, and consumer electronics firms. The nine companies will now undertake discussions in an effort to develop a patent licensing program. Thomson, which has worked closely on DVD development, has expressed a desire to join the discussion.

From today on, the companies supporting DVD will propose and promote a wide range of applications for the format. They will continue to develop the technology and work to position DVD optical discs as the ideal digital storage medium for the age of multimedia.

Specifications have now been finalized for the DVD movie player and the ROM (Read Only Memory) for computer application. These specifications reflect the recommendations made by the Hollywood studios and the computer industry. Specifications for music applications will be finalized after hearing opinions from the music industry.

The name chosen for the new format is a familiar one: DVD.

The technical specifications are as shown in the appendix.

Over December 12 and 13, the DVD Forum in Tokyo will pave the way to the early start up and development of businesses using DVD technology.


Main Specifications

Physical Characteristics
Disc Diameter 120mm (5 inches)
Disc Thickness 1.2mm (0.6mm thick disc x 2)
Memory Capacity 4.7 gigabytes/single side
Track Pitch 0.74 micrometer
Wave Length of Laser Diode 650 nanometer/635 nanometer
Numerical Aperture (NA) 0.6
Error correction RS-PC (Reed Solomon Product Code)
Signal Modulation 8 - 16

Specifications for Audio/Video Application
Data transfer Rate Variable speed data transfer at an average rate of
4.69 megabits/second for image and sound
Image Compression MPEG-2 digital image compression
Audio Dolby AC-3 (5.1 ch), LPCM for NTSC and
(A maximum of 8 audio channel and 32
subtitle channel can be stored.)
Running Time (movies) 133 min. a side
(at an average data rate of 4.69 megabits/second
for image and sound, including 3 audio channels
and 4 sub-title channels)
File Management Structure Micro UDF and ISO-9660

Specifications for Computer Application
File Management Structure Micro UDF and/or ISO-9660

Notes: Dolby is a trademark of Dolby Laboratories Licensing Corporation.

Information in the press releases, including product prices and specifications, content of services and contact information, is current on the date of the press announcement,but is subject to change without prior notice.