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Proceedings Paper

Experimental Study Of Audio Recording On The Guard Band In Still Video Floppy
Author(s): Takashi Matsumoto; Yasuo Nagashima; Ryuji Shirahata; Satoshi Yoshida; Masamichi Sato; Taichi Takesa
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Paper Abstract

There are 40 um wide guard bands between video tracks in Still Video Floppy according to specifications agreed upon by more than 40 companies world wide. We studied the possibilities of using the guard bands as additional tracks, and succeeded in recording audio signals on the guard bands without deterioration in the video signals recorded in advance on adjacent tracks. The video head used in this experiment has 3 gaps, with the third gap having a non zero azimuth angle. The center frequency of carrier of FM audio signal is chosen to be about 4 MHz instead of 6 MHz, which is the counter part in the above-mentioned specification. The quality of the playback audio signal is much better than that of telephone voice transmission, when the time compression/expansion ratio is 640, that is, about 10 seconds of audio signals can be recorded per track.

Paper Details

Date Published: 11 May 1988
PDF: 4 pages
Proc. SPIE 0900, Imaging Applications in the Work World, (11 May 1988); doi: 10.1117/12.944689
Show Author Affiliations
Takashi Matsumoto, Fuji Photo Film (Japan)
Yasuo Nagashima, Fuji Photo Film Co (Japan)
Ryuji Shirahata, Fuji Photo Film Co (Japan)
Satoshi Yoshida, Fuji Photo Film Co (Japan)
Masamichi Sato, Fuji Photo Film Co (Japan)
Taichi Takesa, Fuji Photo Film Co (Japan)

Published in SPIE Proceedings Vol. 0900:
Imaging Applications in the Work World
Ronald J. Clouthier; Gary K. Starkweather; Andrew G. Tescher; Thomas L. Vogelsong, Editor(s)

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