Test Media - Page 1
Recently we have upgraded our test methodology with the adoption of industry
standard test discs. The importance of standardized test discs is high since
it enables manufacturers to isolate and improve possible problems/bugs that
may arise during our tests. In the following pages we describe the physical
characteristics of the discs.
- What is test media?
Various kinds of Test media are used in developing audiovisual goods, car audio
goods, and computers you often see in your daily life. They play a very important
role in securing playback compatibility between those products. For instance,
you don't worry whether music CDs sold in the ships will play on your CD player.
You know it will. That's because hardware manufacturers of CD player have maintained
the compatibility for various conditions of discs. Test media is always necessary
to achieve that. Without test media, you perhaps, might have to worry about
the playability of music CD you want to buy at shops.
"Test media" might be described, in other words, like a "measuring
rod of playability". In reading a CD, for instance, there is provision
in the reader for disc damage. Even if there are small scratches on your CD,
the CD player can often play the CD without any noise or interruption since
it has some error correction circuitry. Using standard Test CD with various
sized scratches, hardware manufacturers can know the capability margin of their
CD player and its ability to correct for scratches and defects in the media.
"Test media" is the generic name for discs and tapes user as standards
for strict quality specifications, which are required in the processes of designing,
manufacturing, and quality control of DVD (CD)-ROM drives, DVD (CD) players,
MD players, and Cassette tape recorders.
- Where "Test Media" products are used?
They are used in diversified places and purposes not only in designing, but
also in the production process such as the process of manufacturing, assembling,
and inspection. All products pass through tests before shipment will be shipped
to the marketplace. Every DVD player you used and every CD-ROM drive you have
used to play movies or games was tested to standard using Test Media products.
Test media products are used in the development and manufacturing of:
- Semiconductors used in drives
- Optical pick-up units
- Mechanical units
- Printed circuit boards (PCB)
- Finished product testing and finally even in repair service facilities
- Are there various kinds of "Test Media"?
Besides standard times are mainly used for reference purposes, various Test
Media have been developed on which defects are intentionally created in order
to simulate flaws and damage. Testing of CD, DVD and other involves this type
of media. As Almedio says "...we have developed more than 3000 kinds of
test tapes and more than 1500 kinds of custom test discs..."
- Which manufacturers sell "Test Media"?
established in 1981. The company is engaged in 1) the planning, development,
manufacture and sale of commercial-use test media such as test discs, test tapes
and test CD-ROMs used to measure and adjust the performances of electrical,
mechanical characteristics of cassette players, video players, CD players and
CD-ROM drives; 2) manufacture of music CDs consigned by music software production
companies and CD-ROMs and 3) consigned systems development and development and
sale of CAD (computer-aided drafting) systems.
Almedio is probably the biggest manufacturer that offers Test Media. They offer
CD, CD-R, DVD, MD and casette test media for various uses. For more information
Sales Division Test Media Dep.
Phone: 042-397-1331Fax: 042-397-1919
Pioneer: Pioneer DVD Verification Laboratory offers DVD-R/RW verification
Tests discs for DVD-R/RW enabled drives. Fore more information check their website
or contact them directly...
DVD Verification Laboratory
- TEAC Japan
offers also a series of test media for CD,
MD, casette formats.
For more information:
Calibration Media Group
Phone: (81) 0422 52 5074
Fax: (81) 0422 55 2582
JVC Japan offers a series of test media for CD,
MD, casette formats
For more information:
VICTOR COMPANY OF JAPAN, LIMITED
MITO BUSINESS CENTER
TEST MEDIA GROUP
1030 Motoyoshida-cho, Mito-city, Ibaraki, 310-8528 JAPAN
Panasonic Japan offers test media for DVD formats
- Philips offers
a variety of test media for CD format.