Victor Company of Japan, Limited

Teac Corporation

Hiroshi Nishiumi

Mitsuhiko Hara

Kanjyu Ishii

Yasuhiro Ueki

Tetsuya Suwa

Seiji Higurashi

Yasuomi Namiki

Shinji Irioka

One of (1) a signal reproduced from a recording medium by a pickup device and (2) control information related to the reproduced signal is searched in a first search range for first information. A trial is made for detecting an optimum condition of a reproducing operation of the pickup device with respect to the recording medium on the basis of the first information. In cases where detecting an optimum condition of the reproducing operation of the pickup device with respect to the recording medium on the basis of the first information has been unsuccessful, one of (1) the reproduced signal and (2) the control information related to the reproduced signal is searched in a second search range different from the first search range for second information. An optimum condition of the reproducing operation of the pickup device is detected on the basis of the second information.

Method and apparatus for reproducing information from recording medium

A magnetic video and audio signals recording apparatus for simultaneously recording Y, PB, PR signals aa, bb, and cc and audio signals dd and ee in first and second track areas on a magnetic recording medium comprising a video signal recording device for recording the Y, PB, and PR signals aa, bb, and cc in the first track area using magnetic heads A1 and B2, a first audio signal recording device for recording an FM audio signal 9a to be recorded obtained by at least frequency-modulating the audio signals in a deep portion of the second track area using a magnetic head C1, and a second audio signal recording device for subsequently recording a PCM audio signal to be recorded 13a on a surface portion of the second track area using a magnetic head D1. A magnetic recording and reproducing apparatus for recording first and second input video signals aa and bb and first and second L and R channel input audio signals cc through ff associated with first and second programs wherein the video signals are recorded on video signal recording tracks TA1 through TB2 formed on a magnetic tape T and, after a first audio signal 9a to be recorded is recorded at a deep portion of an audio-exclusive track TC, a second recording audio signal 13a is recorded on a surface portion thereof at a time interval using magnetic heads C1 and C2.

Magnetic video and audio recording and/or reproducing apparatus and

A magnetic video and audio signals recording apparatus for simultaneously recording video signals and two audio signals in first and second recording areas on a magnetic recording medium comprising a video signal recording structure for recording the video signals in the first recording area using magnetic heads A1 and B2, a first audio signal recording structure for recording an FM audio signal to be recorded obtained by at least frequency-modulating the audio signals in a deep portion of the second recording area using a magnetic head C1, and a second audio signal recording structure for subsequently recording a PCM audio signal to be recorded on a surface portion of the second recording area using a magnetic head D1. A magnetic recording and reproducing apparatus for recording first and second input video signals and first and second L and R channel input audio signals associated with first and second programs wherein the video signals are recorded on video signal recording tracks TA1 through TB2 formed on a magnetic tape T and, after a first audio signal to be recorded is recorded at a deep portion of an audio-exclusive track TC, a second recording audio signal is recorded on a surface portion thereof at a time interval using magnetic heads C1 and C2.

Magnetic video and audio recording and/or reproducing apparatus for

A digital audio signal is subjected to predetermined modulation using a predetermined carrier, and thereby the digital audio signal is converted into a modulated digital audio signal. An FM audio signal is generated. The modulated digital audio signal and the FM audio signal are combined into a composite audio signal. The composite audio signal is superimposed on a high-frequency bias signal, and thereby the composite audio signal is converted into a final modulated audio signal. The final modulated audio signal is recorded into a magnetic tape. A predetermined basic signal is generated. The predetermined carrier and the bias signal are generated from the basic signal. The predetermined carrier and the bias signal have a predetermined frequency relation which is chosen in dependence upon a frequency of beats caused by cross modulation between the modulated digital audio signal and the bias signal.

Magnetic tape recording apparatus

A high-speed erasing apparatus for use in a magnetic recording/reproducing system for erasing a recorded signal on a magnetic tape traveling along a predetermined path. The erasing apparatus comprises a flying-erasing head mounted on a rotary cylinder of the system, a full-erasing head disposed at a preceding position of the flying-erasing head in a traveling direction of the tape, and an audio-erasing head provided at a succeeding position thereof in the traveling direction. Also included in the apparatus are a high-speed erase oscillating circuit for supplying the full-erasing head with an output having a frequency higher than N times of the upper limit of the audible range, a video-erase oscillating circuit for supplying the flying-erasing head with an output having a frequency higher than the upper limit of a video signal range, and an audio-erase oscillating circuit for supplying the audio-erasing head with an output having a frequency higher than the upper limit of the audible range. The oscillating circuits are driven so that, at the initial time, the recorded signal is erased by all of the erasing heads with the tape being transported at the industry standard traveling speed and the high-speed erase oscillating circuit is operated so as to, after elapse of a predetermined time, erase the recorded signal by only the full-erasing head with the tape being transported at N times of the industry standard traveling speed.

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Kawasaki, Japan

Hiroshi Nishiumi