ERIC Number: ED354882
Record Type: Non-Journal
Publication Date: 1988-Sep
Use of Slow-Scan Television Systems in Telemedicine, Distance Education, Government, and Industrial Applications.
Reducing the costs of teaching by television through slow-scan methods is discussed. Conventional television is costly to use, largely because the wide-band communications circuits required are in limited supply. One technical answer is bandwidth compression to fit an image into less spectrum space. A simpler and far less costly answer is to transmit still images only, through what has been called slow-scan television. Transmission rate is reduced and bandwidth can be reduced, with a corresponding increase in the number of video communications channels available. Slow-scan television or "still picture" television is available from several manufacturers, but it is still a very small industry, with most efforts concentrated on equipment designed to operate within the existing telephone network. Satellite experiments with still videos date back to the 1960s, and a variety of techniques can be used for transmission. Several projects have used still video transmission. The most significant project has been a news program service by United Press and a satellite channel focusing on women's issues. The approach has been used in medical education, in other educational endeavors, and by the government for a variety of uses. Although the effectiveness of still video image has been demonstrated, it has not found widescale adoption. (SLD)
Publication Type: Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: Colorado Video, Inc., Boulder.