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Optimization of azimuth angle for some kinds of media on digital VCRs

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3 Author(s)
M. Kobayashi ; Matsushita Electr. Ind. Co. Ltd., Osaka, Japan ; H. Ohta ; A. Murata

A method to determine an optimum azimuth angle in a digital video tape recorder is demonstrated together with consideration made for ME (metal evaporated), MP (metal particulated), and Ba-ferrite tapes. The optimum azimuth angle is derived by comparing the value of theoretically and experimentally derived signal-to-noise ratios (SNRs) at the detecting point of a video cassette recorder with the value of theoretically derived SNR required to achieve a desired bit error rate under crosstalk interference from adjacent tracks. Not only azimuth angle but also bit length and track pitch for maximizing a real recording density are simultaneously derived by the method. The relationship between the optimum azimuth angle and orientation of the tapes is discussed

Published in:

IEEE Transactions on Magnetics  (Volume:27 ,  Issue: 6 )