JPH08124233A - Information recorder/reproducer - Google Patents

Abstract

PURPOSE: To eliminate the time loss by eliminating interruption of information signal even during recording thereby making possible to reproduce a recorded information signal at a desired moment in time. CONSTITUTION: A recording pickup 1 records input signals being fed from an input terminal 6, i.e., an image signal and a voice signal, on an optical disc 5. A reproduction pickup 2 reproduces the image signal and the voice signal randomly from the optical disc 5. A switch 3 switches a reproduction signal from the optical disc 5 and the input signal. A control circuit 4 controls the switch 3, the recording pickup 1 and the reproduction pickup 2 to operate the recording pickup 1 and the reproduction pickup 2 independently and simultaneously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus for recording and reproducing an input information signal on an information storage medium.

[0002]

2. Description of the Related Art Conventionally, a video tape recorder (hereinafter referred to as V
It is called TR. ), The use of time-shift to watch and play recorded programs at your own time, or to fast-forward to watch to save time has become common.

[0003]

By the way, in the case of watching the same program while recording, for example, when the player is forced to go to the middle stage due to a telephone call or a visitor's response, it is currently being recorded. It cannot be played back when it returns. For this reason, the tape must be rewound from the end of the recording to the time of the middle position before the reproduction, which results in a loss of time.

Similarly, even if he came home during recording, he had to wait for the end of recording to watch the program from the beginning.

The present invention has been made in view of the above circumstances, and even during recording, the information signal already recorded can be reproduced from a desired time point without interruption, resulting in loss of time. It is an object of the present invention to provide an information recording / reproducing device that does not require.

[0006]

An information recording / reproducing apparatus according to the present invention is an information recording / reproducing apparatus for recording and reproducing an input information signal in an information storage medium, and recording the information signal in the information storage medium. Recording means, reproducing means for randomly reproducing the information signal from the information storage medium, switching means for switching the reproducing signal from the reproducing means and the input information signal, the recording means and the reproducing means. And the control means for controlling the switching means, and the control means solves the above problem by operating the recording means and the reproducing means independently at the same time.

In this case, the control means controls the recording means and the reproduction means so as to reduce the time difference between recording and reproduction.

Further, the control means controls the recording means and the reproduction means so as to vary the reduction of the time difference between the recording and the reproduction.

Further, the control means detects the time difference between the recording and the reproduction and displays it on the display section.

Further, the control means detects a specific code at the time of emergency broadcasting, switches the switching means according to the detection signal, and outputs the input information.

[0011]

In the information recording / reproducing apparatus according to the present invention, the recording means for recording the input information signal in the information storage medium and the reproducing means for randomly reproducing the information signal from the information storage medium are controlled by the control means. Since the information signals are operated independently at the same time, even if the information signal is being recorded, the information signal already recorded can be reproduced from a desired time point without interruption, thus eliminating time loss.

Further, since the control means shortens the time difference between the recording and the reproduction and further varies the shortening, the reproduction can be caught up with the main broadcasting which is being broadcast in real time.

Further, the control means detects the specific code at the time of emergency broadcasting, switches the switching means according to the detection signal, and outputs the inputted information. Therefore, when the emergency signal is transmitted. , The original signal can be output immediately.

[0014]

Embodiments of the information recording / reproducing apparatus according to the present invention will be described below with reference to the drawings.

First, the first embodiment is an optical disk recording / reproducing apparatus using an optical disk as an information storage medium. As shown in FIG. 1, this optical disk recording / reproducing apparatus includes a recording pickup 1 for recording a video signal and an audio signal, which are input signals supplied from an input terminal 6, on an optical disk 5, and a random access reproducing pickup 2. It has a changeover switch 3 for switching a reproduction signal from the optical disk 5 and the input signal, and a control circuit 4 for controlling the changeover switch 3, the recording pickup 1 and the reproduction pickup 2.

The control circuit 4 controls switching of the changeover switch 3 by an external emergency signal and control signal supplied via the input terminals 7 and 8, and outputs a video signal and an audio signal via the output terminal 9. To do. Here, the emergency signal may be sent on the input video signal.

This optical disk recording / reproducing apparatus is usually provided with a recording pickup 1 for recording video signals and audio signals input from a video tape recorder (hereinafter referred to as VTR).
Are recorded on the optical disc 5, and the changeover switch 3 is selected on the input signal side to output the input signal as an output signal.

For example, when an output signal is being supplied to a television and there is a scene that is missed or when it is desired to go back in time for some reason, the control circuit 4 controls the reproduction pickup 2 which can be randomly accessed to achieve the purpose. The signal at that time is accessed to reproduce the signal at that time, and the changeover switch 3 is set to the reproducing pickup side to output the signal.

With this, it is possible to play back while recording, and if it is desired to further shorten the time, the control circuit 4 causes the reproducing pickup 2 to make a track jump so that the recording disc is recorded. The signal of can be skipped or skipped and played back. Since this reproducing pickup 2 can randomly access any position on the disc, it can read any previously recorded signal. For example, if a user misses a 60-minute broadcast for the first 10 minutes and wants to watch a 60-minute broadcast in the remaining 50 minutes, that is, assuming that there is a time difference of 10 minutes between the recording pickup 1 and the reproduction pickup 2. That can be achieved by playing at double speed. That is, the control circuit 4
The recording pickup 1 and the reproduction pickup 2 are controlled so as to reduce the time difference between recording and reproduction. Further, the control circuit 4 increases the reproduction speed from, for example, 1.2 times speed to 1.4 times speed to variably shorten the time difference between recording and reproduction.
And the reproduction pickup 2 may be controlled.

When an emergency signal is input from the outside, the control circuit 4 immediately switches the changeover switch 3 to the input signal side and outputs the input signal.

Next, a specific example of this optical disk recording / reproducing apparatus will be described with reference to FIG.

First, in this specific example, the input signal is always continuously recorded by the following configuration. That is, a video signal and an audio signal supplied from the input terminal 11 are converted into a digital signal by an analog / digital (hereinafter, A / D) converter 12, and this digital signal is modulated by a modulation circuit 13 to obtain recording data. , For recording (indicated as write in the drawing) is supplied to the pickup 14. The recording pickup 14 emits a recording laser beam to the magneto-optical disk 15 according to the recording data. An external magnetic field generating coil L driven by the magnet drive circuit 16 is arranged close to the back surface of the signal recording surface of the magneto-optical disk 15 which is irradiated with the recording laser light. The recording pickup 14 is servo-controlled with respect to tracking, focusing, etc. by a recording (referred to as write in the figure) pickup servo circuit 18 controlled by a system control circuit 17. Further, the decode circuit 19 decodes the track number from the return light of the recording laser light from the pre-groove or the like of the magneto-optical disk 15, and supplies it to the system control circuit 17. The system control circuit 17 servo-controls the recording pickup 14 via the recording pickup servo circuit 18 in accordance with the track number to write the recording data at a predetermined position on the magneto-optical disk 15. Further, the magneto-optical disk 15 has a spindle servo circuit 2 system-controlled by a system control circuit 17.
It is rotated by a spindle motor 21 servo-controlled by 0.

The video signal and the audio signal supplied through the input terminal 11 are system-controlled by the system control unit 17 and the recording pickup 1 described above.
It is always recorded continuously by 4.

In this specific example, with the configuration as described below, data is read out as needed, random access such as seek is performed, and any recorded signal is reproduced. That is, an information signal such as a video signal and an audio signal recorded on the magneto-optical disk 15 is reproduced (referred to as lead in the drawing) controlled by the system control circuit 17 by the pickup servo circuit 22 to perform tracking, focusing, etc. Is read by a servo-controlled reproducing (referred to as read in the drawing) pickup 23 as required. An RF signal which is a magneto-optical (indicated as MO in the figure) signal read by the reproducing pickup 23 is supplied to the demodulation circuit 24. Demodulation circuit 2
The RF signal demodulated in 4 is converted into an analog signal by the D / A converter 25, and is output as a video signal and an audio signal output signal through the output terminal 26.

When an emergency signal is supplied from the input terminal 27 to the system control circuit 17, the input terminal 1
An input signal composed of a video signal and an audio signal supplied from No. 1 is output from the output terminal 26.

As is apparent from this specific example, the optical disk recording / reproducing apparatus of the first embodiment can see the already recorded video without interruption even during recording. Further, when it is difficult to listen to a program and there is a scene that is missed, it is possible to randomly return to a desired scene and catch up with the main broadcast. Moreover, when an emergency signal such as a warning is sent, the information can be immediately sent by immediately switching to the original signal.

Next, in the second embodiment, as shown in FIG.
The hard disk device 30 uses a magnetic disk 31 as an information storage medium. This hard disk device 30
Is a voice coil motor (Voic for recording head) equipped with a recording head 32 for recording an information signal on a magnetic disk 31.
e Coil Motor, hereinafter referred to as VCM. ) 33, a reproducing head VCM 35 having a reproducing head 34 for reproducing an information signal from the magnetic disk 31, an input terminal 36 for inputting an external signal, and a signal from the reproducing head 34 for switching the output terminal 39. Output changeover switch 3
7, VCM 33 for recording head, VCM 3 for reproducing head
5 and a control circuit 38 for controlling the changeover switch 37.

The hard disk device 30 can independently drive the recording head VCM 33 and the reproducing head VCM 35. As the recording head 32, a general inductive head is used. Further, although an inductive head can be used as the reproducing head 34, in order to improve the recording density of the magnetic disk 31, and since the reproducing head 34 does not need to record information, it is compatible with high spatial frequencies. It is desirable to use a magnetic resistance (MR) head that has a characteristic that it is possible but not writable.

Next, a system for inputting an RF signal transmitted from a television station to the hard disk device 30 via a VTR will be described with reference to FIG.

The RF signal transmitted from the television station is input to the VTR 41 from the antenna 40. Video signals and audio signals are output from the VTR 41 and input to the hard disk device 30 via the input terminal 36 shown in FIG.

Video signals and audio signals are output from the output terminal 39 of the hard disk device 30, which are input to the television receiver 42 and output as video and audio.

When the hard disk device 30 is not operating, the changeover switch 37 in FIG. 3 is in the upward direction, and the input signal is output as it is from the output terminal 39.

When the hard disk device 30 starts to operate, the video signal and the audio signal sent thereto are recorded by the recording head 3.
The video signal and the audio signal, which are recorded on the magnetic disk 31 by 2 and are recorded on the magnetic disk 31 in the past, are reproduced by the reproducing head 34 and output to the television receiver 42.

Here, the reproducing head 34 has a control circuit 38.
Is moved to any position. Therefore, while the user is watching the program, it is possible to repeatedly play back a missed scene or a scene that he / she wants to watch again, slow playback, or rewind playback.

By the way, repeated reproduction, slow reproduction,
If you rewind, you will not be able to watch the broadcast in real time. Therefore, by operating the position of the reproducing head 34, fast-forward reproduction or frame skipping reading,
By skipping the CM, etc., it becomes possible to approach real-time broadcasting.

At this time, the television receiver 32
The user can recognize the time difference by displaying the time difference between the video and audio output to the real time broadcast and the time difference display device 43. Here, the time difference display device 43 may be installed independently or may use a part of the screen of the television receiver 42.

If the television receiver 42 is viewed with a time lag as described above, the emergency broadcast in the event of a disaster may not be seen in real time.
Therefore, when an emergency broadcast is sent, the control circuit operates when a specific code is first transmitted, and the video and audio signals can be directly output without going through the hard disk device.

As described above, according to the hard disk device of the second embodiment, even during recording, for example, the recorded image can be viewed without interruption. Further, when it is difficult to listen to a program and there is a scene that is missed, it is possible to randomly return to a desired scene and catch up with the main broadcast.
Moreover, when an emergency signal such as a warning is sent, the information can be immediately sent by immediately switching to the original signal.

Although the hard disk device 30 is treated as an independent device in the second embodiment, it may be built in a VTR or a television receiver.

[0040]

The information recording / reproducing apparatus according to the present invention is an information recording / reproducing apparatus for recording and reproducing the input information signal in the information storage medium, and a recording means for recording the information signal in the information storage medium. Reproducing means for randomly reproducing the information signal from the information storage medium, switching means for switching the reproducing signal from the reproducing means and the input information signal, the recording means, the reproducing means, and the switching means Since the control means operates the recording means and the reproducing means independently at the same time, the information signal already recorded is not interrupted even when the information signal is being recorded. The signal can be regenerated from the desired point in time without the need for time loss.

Further, since the control means shortens the time difference between recording and reproduction and varies the shortening, the reproduction can catch up with the main broadcast which is being broadcast in real time.

Further, the control means detects the specific code at the time of emergency broadcast, switches the switching means according to the detection signal, and outputs the inputted information. Therefore, when the emergency signal is transmitted. , The original signal can be output immediately.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an optical disk recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a specific example of the optical disc recording / reproducing apparatus of the first embodiment.

FIG. 3 is a configuration diagram of a hard disk device according to a second embodiment of the present invention.

FIG. 4 is a system configuration diagram when an RF signal transmitted from a television station is input to a hard disk device of a second embodiment via a VTR.

[Explanation of symbols]

 1 Recording pickup 2 Playback pickup 3 Changeover switch 4 Control circuit

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Claims (5)

[Claims] 1. An information recording / reproducing apparatus for recording and reproducing an input information signal in an information storage medium, a recording means for recording the information signal in the information storage medium, and the information signal from the information storage medium. And a reproduction means for randomly reproducing, a switching means for switching the reproduction signal from the reproduction means and the input information signal, and a control means for controlling the recording means, the reproduction means and the switching means, An information recording / reproducing apparatus wherein the control means operates the recording means and the reproducing means independently and simultaneously. 2. The information recording / reproducing apparatus according to claim 1, wherein said control means controls said recording means and said reproducing means so as to reduce a time difference between recording and reproducing. 3. The information recording / reproducing apparatus according to claim 1, wherein the control unit controls the recording unit and the reproducing unit so as to vary the reduction of the time difference between recording and reproducing. 4. The information recording / reproducing apparatus according to claim 1, wherein the control means detects a time difference between the recording and reproducing and displays it on a display unit. 5. The control means detects a specific code during an emergency broadcast, switches the switching means according to the detection signal, and outputs the input information. Information recording / reproducing apparatus.