Betamax
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Sony's Betamax is the 1/2 inch (12.7 millimeter) home videocassette tape recording format introduced on April 16, 1975 (in market on May 10) and derived from the earlier, professional 3/4 inch (19.05 millimeter) U-matic video cassette format. Like the video home recording system VHS introduced by JVC in 1976, it had no guard band, and used azimuth recording to reduce cross-talk. The "Betamax" name came from a double meaning: beta being the Japanese word used to describe the way signals were...
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