Audio dubbing device of video cassette recorder

专利摘要:
The present invention relates to an audio dubbing apparatus of a video cassette recorder for automatically performing a dubbing operation of an audio signal output from another external device during reservation recording. According to the present invention, a video cassette recorder having a DC supply outlet on the top thereof is connected to an external device without a reservation function at a DC supply outlet, and is set to a dubbing mode for recording an audio signal of the external device. When the scheduled recording starts at, the DC power is supplied to the DC supply outlet by the switching action, and the power supplied to the DC supply outlet is supplied to the external device so that the audio signal from the external device is input to the line audio signal input of the video cassette recorder. And to process and record this line audio signal on a magnetic tape. Therefore, the present invention has the effect of performing a scheduled recording of a device without a reserved recording function using a video cassette recorder.
公开号:KR19990056458A
申请号:KR1019970076453
申请日:1997-12-29
公开日:1999-07-15
发明作者:홍재규
申请人:전주범；대우전자 주식회사；
IPC主号:

专利说明:

Audio dubbing device of video cassette recorder
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reserved recording apparatus of a video cassette recorder, and more particularly, to an audio dubbing apparatus of a video cassette recorder for automatically performing a dubbing operation of an audio signal output from another external device during scheduled recording. It is about.
In general, a video cassette recorder has a recording function for recording a composite video signal applied from a tuner tuned into a desired channel to a broadcast signal received through an antenna, and a composite video signal recorded on the magnetic tape to reproduce a television. It has a playback function to display on the monitor.
In addition, the video cassette recorder has a reserved recording function, which is an advantageous function of automatically recording a broadcast program desired by the user in the absence of the user so that the user can play and watch it at a desired time.
However, in the case of an electronic device such as a recorder which is automatically played when only power is input, there is no reservation recording function as described above.
In addition, after performing the reserved recording function as described above, in order to perform the dubbing operation, a dubbing operation is performed with the audio signal desired by the user when the reserved recording program is played back. In this case, the dubbing operation is performed when the dubbing operation is finished. There was an inconvenience that the user must perform directly.
At this time, the dubbing operation refers to the operation of recording only the audio signal after recording the video signal once, in this operation state, the video processing system performs the playback mode and the audio processing system performs the recording mode. At this time, the audio processing system records the audio track while erasing only the audio track.
Meanwhile, as shown in FIG. 1, there is a video cassette recorder configured to be connected to an external device because a DC supply outlet is attached to a predetermined portion of the body.
The present invention has been made as described above, an object of the present invention is to connect an electronic device without a reservation recording function to a video cassette recorder having a direct current (DC) supply outlet to perform a reservation recording function, reservation recording The present invention provides an audio dubbing apparatus for a video cassette recorder for automatically dubbing audio signals output from an external device.
The present invention for achieving the above object is an audio dubbing apparatus for dubbing an audio signal of an external device in a video cassette recorder in which a DC supply outlet is attached to a predetermined portion. A power supply for supplying power regularly; When a scheduled recording start time comes when a mode for dubbing an audio signal of the external device is set, a switching control signal for selectively supplying DC power of the power supply unit is provided, and the audio signal of the external device A control unit controlling to record on a tape; A first switching unit providing the DC power supply of the power supply unit to the DC supply outlet according to a switching control signal provided by the control unit; And an audio signal recorder for selecting and recording an audio signal of the external device provided through a line when the DC power is supplied to the external device by the DC supply outlet under the control of the controller.
The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.
1 is a perspective view of a video cassette recorder with a DC supply outlet on its top surface;
2 is a block diagram showing the configuration of an audio dubbing apparatus of a video cassette recorder according to the present invention.
<Description of the symbols for the main parts of the drawings>
10: power supply unit (SMPS) 20: first switching unit
30 control unit 40 audio signal recorder
41: broadcast audio signal processor 42: line audio signal processor
43: second switching unit 44: head amplifier
45: head 50: DC supply outlet
100: video cassette recorder 200: external device
Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.
1 is a perspective view of a video cassette recorder having a DC supply outlet attached to an upper surface according to the present invention. In the present invention, an external device such as a recorder that is automatically played when only a power supply is inputted from the upper DC supply outlet and an external device. Connect the power cord of the device and connect the audio input of the video cassette recorder and the output of the external device via the line.When the scheduled recording start time comes, supply the power of the video cassette recorder to the external device using the DC supply outlet. The audio signal output from the device can be dubbed to the video cassette recorder.
At this time, as shown in the figure, a line is connected between the video cassette recorder and an external device, so that when the power is supplied to the external device, the audio signal of the external device can be supplied to the video cassette recorder.
FIG. 2 is a block diagram showing a configuration of a video cassette recorder for performing an audio dubbing operation according to the present invention. The power supply unit (SMPS) 10, the first switching unit 20, the control unit 30, and an audio signal recorder are shown in FIG. 40, a DC supply outlet 50, wherein the audio signal recorder 40 includes a broadcast audio signal processor 41, a line audio signal processor 42, a second switching unit 43, and a head amplifier. 44, the head 45 is comprised.
The controller 30 is configured to supply power to the power supply unit 10 when the scheduled recording start time according to the reserved recording information input through a key input unit (not shown) and the dubbing mode for recording audio signals of the external device are set. The switching control signal is provided to the first switching unit 20.
At this time, the power supply unit 10 is configured to supply the power required at the load stage as is well known, and has various advantages of small size and light weight.
That is, when the switching control signal provided from the control unit 30, that is, the high level logic signal is provided, the first switching unit 20 turns on the first switching transistor Q1 and accordingly the second switching transistor Q2. ) Is turned on and the power supplied from the power supply unit 10 is supplied to the DC supply outlet 50 through the first switching unit 20.
Here, the first switching transistor Q1 is an NPN type transistor in which the emitter terminal is grounded, and the second switching transistor Q2 is a PNP type transistor in which the emitter terminal is connected to the power supply unit 10. In addition, a bias resistor R2 is connected between the first switching transistor Q1 and the second switching transistor Q2, and the bias resistor R1 is also present between the controller 30 and the first switching transistor Q1. ) Is connected.
On the other hand, the DC supply outlet 50 supplies the supplied power to the external device 200, the external device 200, when power is supplied from the DC supply outlet 50, the audio signal through the line (LINE) audio signal The line audio signal processor 42 of the recorder 40 is provided.
Accordingly, the line audio signal processor 42 processes and provides audio signals of an external device provided through the line under the control of the controller 30.
The broadcast audio signal processor 41 processes and provides the audio signal of the broadcast signal of the reserved channel among the reserved recording information input through the key input unit under the control of the controller 30.
At this time, if the current reserved recording mode is set to the dubbing mode for recording the audio signal of the external device as described above, the controller 30 sets the switching terminal c of the second switching unit 43 to (b). The output signal of the line audio signal processing section 42 is provided to the head amplifier 44 by switching to the terminal side.
Accordingly, the head amplifier 44 amplifies the line audio signal provided by the line audio signal processor 42 to the head 45, and the head 45 is amplified by the head amplifier 44 and provided with the line audio signal. Record on a magnetic tape.
As described above, in an audio dubbing apparatus of a video cassette recorder according to the present invention, in a video cassette recorder having a DC supply outlet on an upper surface thereof, an external device having a reservation function is connected to the DC supply outlet, When the scheduled recording start time is reached in the dubbing mode for recording audio signals, DC power is supplied to the DC supply outlet by a switching action, and the power supplied to the DC supply outlet is supplied to an external device, The audio signal is input to the line audio signal input terminal of the video cassette recorder, processed, and recorded on the magnetic tape, so that the scheduled recording of a device without a scheduled recording function can be performed using the video cassette recorder. There is.
While the invention has been shown and described with respect to certain preferred embodiments, it will be apparent to those skilled in the art that various modifications, changes and omissions can be made without departing from the spirit and scope of the invention.

权利要求:
Claims (2)
[1" claim-type="Currently amended] An audio dubbing apparatus for dubbing an audio signal of an external device in a video cassette recorder having a DC supply outlet attached to a predetermined portion.
A power supply unit which regularly supplies the DC power required at the load end;
When a scheduled recording start time comes when a mode for dubbing an audio signal of the external device is set, a switching control signal for selectively supplying DC power of the power supply unit is provided, and the audio signal of the external device A control unit controlling to record on a tape;
A first switching unit providing the DC power supply of the power supply unit to the DC supply outlet according to a switching control signal provided by the control unit;
An audio dubbing device of a video cassette recorder including an audio signal recorder for selecting and recording an audio signal of the external device provided through a line when DC power is supplied to the external device by the DC supply outlet; .
[2" claim-type="Currently amended] The audio signal recorder of claim 1,
A broadcast audio signal processor configured to process and provide an audio signal among broadcast signals of a channel for reserved recording;
A line audio signal processor configured to process and provide an audio signal output from the external device through a line;
A second switching unit switching and switching under the control of the controller to provide an audio signal of the line audio signal processing unit;
A head amplifier for amplifying and providing a line audio signal provided through the second switching unit;
A head for recording the line audio signal provided through the head amplifier;
The first switching unit,
A first bias resistor connected to the controller;
A first switch transistor of an NPN type having a base end connected to the first bias resistor and an emitter end grounded;
A second bias resistor connected to the collector terminal of the first switching transistor;
And a second switching transistor of the PNP type having a base end connected to the second bias resistor and an emitter end connected to the power supply.

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同族专利:

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引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
1997-12-29|Application filed by 전주범, 대우전자 주식회사

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1997-12-29|Priority to KR1019970076453A

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1999-07-15|Publication of KR19990056458A

优先权:

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申请号 | 申请日 | 专利标题

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KR1019970076453A|KR19990056458A|1997-12-29|1997-12-29|Audio dubbing device of video cassette recorder|