FM AUDIO MUTING MARGIN ESTIMATING DEVICE FOR MAGNETIC RECORDING AND REPRODUCING DEVICE, FM AUDIO MUTING MARGIN ESTIMATING METHOD FOR MAGNETIC RECORDING AND REPRODUCING DEVICE AND MAGNETIC RECORDING AND REPRODUCING DEVICE

摘要

PROBLEM TO BE SOLVED: To improve a compatible performance by measuring a muting margin based on reproduced levels of a reference tape while measuring a two-dimensional track pattern consisting of tracking offsets and reproduced outputs as to the FM audio signal of a tape which is recorded with a VTR for test. ;SOLUTION: A PC measures levels of a reproduced signal by setting fixed tracking offsets to a loaded tape by giving instructions to a reference VCR, The PC measures levels of the reproduced signal by changing successively tracking offsets by fixed tracking deviations. Then, the PC obtains the tracking pattern by statistically processing data consisting of these tracking offsets and reproduced outputs, Moreover, the PC measures an AFM recording level by loading a pre-recorded tape which is recorded with an FMA recording system to the reference VCR while using a VTR for test, Since the PC stores the track pattern which is preliminarily measured by loading the reference tape to the VCR, the PC evaluates the muting margin based on this.;COPYRIGHT: (C)2000,JPO