U.S. Philips Corporation

Hendrikus Looren De Jong

Harald E Melwisch

In a helical scan recorder using multiple heads having gaps positioned at different aximuth angles tracking errors are detected by signal processing the normal synchronization pulses recorded with the television signal. The signal processing is accomplished by using a phase shift detection circuit and a difference circuit for subtracting signals from the phase shift circuit indicating the instantaneous phase shifts produced by the tracking errors.

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Eindhoven, Netherlands

Hendrikus Looren De Jong