Experimental Digital VTR with Trilevel Recording and Fire Code Error Correction

This paper describes an experimental digital videotape recorder that uses trilevel magnetic recording and improved Fire-code error-correction techniques. The S/N ratio obtained was almost the same as that obtained with the conventional NRZ method. The VTR that has been demonstrated records in two magnetic channels at the same rate of tape consumption as an analog VTR. The optimum tape format is under investigation.