Atsuo Ochi

Time-reversal Nonlinear Emphasis Applied To Analog HDVCRs

A nonlinear emphasis system using time-axis reversal processing is discussed. The advantages of this system for improving the signal-to-noise ratio without causing deterioration of image quality over the conventional CR-type nonlinear emphasis are experimentally confirmed by application of this system to a VCR using an analog recording system. >

A two-channel recording VCR using orthogonal arrangement of heads

The authors describe a novel design technique for FM carrier allocation and an improved two-channel recording technique allowing both standard and long-play modes. Consequently, the experimental VCR can be used as a wide-screen-TV recorder. Experimental results confirm that this high-efficiency recording technique provides a picture quality nearly equal to that of the VCR for broadcast use with 1/2-inch conventional video tape. For users of conventional TV a converter from wide-screen to conventional signal format has been developed. >