Video tape recorder capable of recording both narrow band and wi

Details Video tape recorder capable of recording both narrow band and wi Video tape recorder capable of recording both narrow band and wi

1989-01-25

1990-10-16

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358335, 360 91, 360 22, H04N 5782

Patent

active

049639919

ABSTRACT:
Disclosed is a video tape recorder capable of recording and reproducing signals with largely different frequency bands such as narrow band signals including NTSC signal and wide band signals represented by high definition television signal. In a time axis expansion circuit, wide band signals are expanded of their time axis and divided into plural channels, and the band frequencies of these channels are lowered, and at the same time, the widths of plural heads are set narrower than the head width used when recording and reproducing the existing narrow band signals, thereby realizing the recording and reproduction of narrow band signals and wide band signals at identical rotating speed of the cylinder and at identical rotating speed of the capstan. Or, the rotating speed of the cylinder is increased when recording and reproducing wide band signals and the head width used for recording and reproducing wide band signals is set narrower than the head width used when recording and reproducing the existing wide band signals, thereby realizing the recording and reproduction of narrow band signals and wide band signals at identical rotating speed of the capstan.

REFERENCES:
patent: 4730222 (1988-03-01), Schauffele
patent: 4743977 (1988-05-01), Yoshioka et al.
patent: 4743978 (1988-05-01), Tanaka
patent: 4839744 (1989-06-01), Sasaki et al.
patent: 4851928 (1989-07-01), Numakura et al.

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