Premastering Formats for Videodisc.

摘要

The optical videodisc offers a new storage and retrieval capability for visual images and audio that is superior to any other medium. Videodisc manufacturers require that source material for disc production be given to them on a single common film or tape (premastering) format. The premastering format, therefore, determines what is actually recorded and stored on the videodisc. Although the selection and preparation of the premastering format may be one of the most important steps in the development and production of videodisc-delivered instruction, there is a general lack of information available to lesson designers about the advantages of various premastering formats. The purpose of this work was to provide information to aid in making decisions regarding the selection and use of premastering formats for instructional materials being prepared for videodisc-delivered training. An existing instructional lesson was copied into five different formats (tape or film). These format copies were then empirically compared to determine material and personnel time needed to produce them, and to calculate videodisc storage space requirements. Also, premastering format requirements when developing original audiovisual instructional materials and when converting existing audiovisual materials for videodisc training delivery were analyzed.