US 4,363,039 AGranted

Automatic operation control apparatus for a PCM recording and reproducing system

AssigneeHitachi, Ltd.

InventorsKeizo Nishimura, Yasunori Kanazawa

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Abstract

A PCM recording system uses vertical and horizontal synchronizing signals like those of a television video signal, and records PCM sound signal data taking the form of PCM signals converted from a sound signal during specific ones of plural horizontal scanning periods disposed between the vertical synchronizing signals. At least one control signal such as an absolute address signal representing a tape position, an operation indicating signal for indicating the operations such as a tape running stop and a tape rewind and an adjusting signal for adjusting a reproducing system is recorded during the horizontal scanning period with no recording of the PCM sound signal data. At the time of signal reproducing, the control signal is extracted to perform a given display or a given control.

Claims16

Dependent claims

detector means including a recording counter for detecting a second horizontal scanning period between the vertical synchronizing signals, the second horizontal scanning period being different from the first horizontal scanning period, the recording counter being reset by the vertical synchronizing signals to initiate counting of the horizontal synchronizing signals;
means for generating at least an operation control signal for enabling control of a drive mechanism for the recording medium during a reproduction operation;
and
means for recording on the recording medium the operation control signal generated by said operation control signal generator means when said detector means detects the second horizontal scanning period;
whereby the recording medium includes the operation control signal in at least one second horizontal scanning period between the vertical synchronizing signals, the operation control signal being reproducible for enabling control of the recording medium during a reproduction operation.

2 more elements

An automatic operation control apparatus for a PCM recorder system in which a PCM signal is recorded on a recording medium together with vertical and horizontal synchronizing signals, the PCM signal including a PCM sound signal recorded on the recording medium during a predetermined first horizontal scanning period of a plurality of horizontal scanning periods arranged between vertical synchronizing signals, at least an operation control signal being recorded on the recording medium during a second horizontal scanning period different from the first horizontal scanning period, for reproduction operation the recording medium being driven by a drive mechanism, and the PCM signal and the vertical and horizontal synchronizing signals being reproduced from the recording medium, the automatic operation control apparatus comprising a reproduction operation device including:

means for extracting and reproducing at least the operation control signal from the recording medium on which the PCM signal and operation control signal are recorded;
and
control circuit means responsive to the extracted operation control signal extracted by said extracting and reproducing means from the recording medium for controlling operation of the drive mechanism for the recording medium during the reproduction operation in accordance with the extracted operation control signal.

detector means including a recording counter for detecting a second horizontal scanning period between the vertical synchronizing signals, the second horizontal scanning period being different from the first horizontal scanning period, the recording counter being reset by the vertical synchronizing signals to initiate counting of the horizontal synchronizing signals;
means for generating an absolute address signal in accordance with a count of the vertical synchronizing signals;
and
means for recording on said recording medium the absolute address signal generated from said absolute address signal generator means when said detector means detects the second horizontal scanning period;
whereby the recording medium includes the absolute address signal in the second horizontal scanning period between the vertical synchronizing signals.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/063,475Filed 3 Aug 1979
Priority: JP 53-954947 Aug 1978
Granted: 7 Dec 1982
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G11B 20/10527
Digital recording or reproducing: audio or video recording; Data buffering arrangements
G11B 15/087
By sensing features present on or derived from record carrier or container: by sensing recorded signals
G11B 19/02
Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of…:…
G11B 27/10
Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel: indexing; Addressing; Timing or synchronising;…