Experimental Study Of Audio Recording On The Guard Band In Still Video Floppy

Takashi Matsumoto; Yasuo Nagashima; Ryuji Shirahata; Satoshi Yoshida; Masamichi Sato; Taichi Takesa

doi:10.1117/12.944689

11 May 1988 Experimental Study Of Audio Recording On The Guard Band In Still Video Floppy

Takashi Matsumoto, Yasuo Nagashima, Ryuji Shirahata, Satoshi Yoshida, Masamichi Sato, Taichi Takesa

Proceedings Volume 0900, Imaging Applications in the Work World; (1988) https://doi.org/10.1117/12.944689
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

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.

Citation Download Citation

Takashi Matsumoto, Yasuo Nagashima, Ryuji Shirahata, Satoshi Yoshida, Masamichi Sato, and Taichi Takesa "Experimental Study Of Audio Recording On The Guard Band In Still Video Floppy", Proc. SPIE 0900, Imaging Applications in the Work World, (11 May 1988); https://doi.org/10.1117/12.944689

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KEYWORDS

Video

Head

Fermium

Frequency modulation

Magnetism

Imaging systems

Magnetic tracking

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