Academic journal article T H E Journal (Technological Horizons In Education)

Multimedia Discs

Academic journal article T H E Journal (Technological Horizons In Education)

Multimedia Discs

Article excerpt

Just the Facts

According to Video-Based Training and Education in Wisconsin, interactive videodisc systems have been installed at over 19,000 schools across the U.S. This reflects what teachers and studies have found to be true: interactive technologies reduce learning time by an average of 31%, raise retention to as high as 80% and raise test scores by as much as 90%.

Based on information from the 1994 Multimedia and Videodisc Compendium for education and training, the number of videodisc titles available last year reached around 2,750. Those numbers are projected to increase to al most 3,250 by the end of 1994.

The growth in CD-ROM and other CD format titles can be significantly measured in just six-month increments. For example, in 1993 the compendium registered an increase of new CD-ROM titles for DOS and Mac platforms, CD-i, CDTV and VIS discs during a six-month period to be 1,107. By the end of last year, a total of 6,000 CD-ROM titles were available.

When T.H.E. Journal asked a random sampling of educators to indicate the number of CD-ROM packages they intended to buy this year, they responded with 239,290. Instructional videodisc purchases should reach 173,485.

A New Kind of Disc

While not an educational title, new types of Photo CD discs have made their way onto the market. The first is the Photo CD Master disc, which holds roughly 100 35ram images in five different resolutions ranging from 192 x 128 pixels to 3,072 x 2,048 pixels. The disc is packaged in a jewel case (standard clear audio CD case) and includes a printed index of numbered thumbnail images.

Next is the Pro Photo CD Master disc, which holds 25 to 100 images depending on the original film type and adds a sixth resolution of 4,096 x 6,144 pixels.

The big news is the Photo CD Portfolio disc, which holds photo images, graphics, stereo audio and text plus the ability to provide interactivity. And lastly, the Photo CD Catalog disc holds up to 4,400 images at any video resolution. This disc can hold all the slides used by a given department, for example.

Two on One

Another trend in multimedia discs is the ability to put two versions of the same application---one Windows and one Mac, for instance--on the same disc. This is easy to do with smaller programs and saves production costs.

It also saves schools money, particularly those with mixed-platform networks. …

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