KR960038833A - Tape player with automatic playback speed correction - Google Patents

Abstract

The present invention provides a tape reproducing apparatus having an automatic reproducing speed correction function to automatically correct a reproducing speed by detecting a case where a tape is stretched or a power supply voltage is not stabilized so that an image and sound are reproduced abnormally. A tape reproducing apparatus for reproducing a video or audio signal recorded on a magnetic tape, the tape reproducing apparatus comprising: a deck for executing a tape reproducing operation according to a predetermined control command, and a servo for controlling the deck to control the reproducing speed of the tape. A control means, a promise signal detection means for detecting a promise signal of a predetermined period included in the playback signal, and a signal of the same period as the promise signal recorded on the tape depending on whether the promise signal is detected by the promise signal detection means. Period signal generating means for generating, the commitment signal detection number A phase comparator for comparing a phase of a signal output from the periodic signal generator and outputting a predetermined difference signal corresponding to a phase difference, and control means for controlling the deck driver based on the difference signal output from the phase comparator. Characterized in that configured.

Description

Tape player with automatic playback speed correction

As this is a public information case, the full text was not included.

1 is a main configuration diagram of a tape playback apparatus having an automatic playback speed correction function according to an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the operation shown in FIG.

Claims (2)

A tape reproducing apparatus for reproducing a video or audio signal recorded on a magnetic tape, comprising: a deck for performing a tape reproducing operation in accordance with a predetermined control command, and servo control means for controlling the tape's reproducing speed by controlling the deck to be driven. A contract signal detecting means for detecting a weak signal of a predetermined period included in the signal, and a periodic signal for generating a signal having the same period as the contract signal recorded on the tape depending on whether the contract signal is detected by the contract signal detecting means A phase comparator for comparing a phase of a signal output from the contracting signal detecting means and the periodic signal generating means to output a correction difference signal corresponding to a phase difference, and the deck based on the difference signal output from the phase comparator It characterized in that it comprises a control means for controlling the drive unit Is a tape playback device with automatic playback speed correction. 2. The filter circuit according to claim 1, wherein the commitment signal detecting means reads out the recorded data and outputs it as an electrical signal, and a filter circuit for filtering only the commitment signal of a predetermined frequency band among the read electrical signals. A peak detector that detects a peak signal of a predetermined level or more among the signals filtered by and outputs a sinusoidal signal having a predetermined level between the peak and the peak of the peak, and a waveform shaping circuit for shaping the sinusoidal signal detected by the peak detector with a square wave pulse. Tape playback device with automatic playback speed correction, characterized in that consisting of. ※ Note: This is to be disclosed by the original application.