JPH0793707B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a decoder and a television receiver (hereinafter referred to as TV) connected to a recording / reproducing device (hereinafter referred to as VTR).
Also, the present invention relates to a magnetic recording / reproducing apparatus for switching signals when connecting to other video equipment.

[Conventional technology]

Conventionally, when connecting a decoder to a VTR, it was used only to decode the VTR television signal (hereinafter referred to as the tuner output).
It became possible to electrically connect the TV and the decoder connected to the.

However, normally, the VTR and the TV have a connection terminal for exchanging signals with each other by the video signal (including the audio signal), and if the TV and the decoder are to be connected via the VTR,
In addition, a connection cable for TV and VTR is required. Moreover, T
It is necessary to separately provide a connector for connecting the decoder on the V side.

These states will be described with reference to the drawings. Fig. 3 shows the conventional VT
It is a block diagram showing a connection system of R, TV, and a decoder.
In FIG. 3, 1 is a VTR, 2 is a decoding device (hereinafter referred to as a decoder), 3 is a TV, VTR1 and TV3
Are connected to the video signal connection cable 4 and the RF signal connection cable 6.

The VTR 1 and the decoder 2 are connected by a cable 5. A cable 9 for connecting the TV 3 and the decoder 2 is required in addition to these cables.

Next, the detailed signal connection at this time will be described with reference to FIG. In FIG. 4, 1a is a video signal processing circuit in VTR1, 1b is a VTR1 tuner circuit, 1c is a video input cable, and 1d is a video output cable.

VTR is VTR input switching switch 8 and decoder switching switch 7
When connecting the signal of TV3 to the decoder 2 with a and 7b, the signal from TV3 is input signal cable 9a, switching switch.
It is led to the decoder 2 via 7a, is decoded there, and the decoded signal is the switching switch 7b, the output signal cable 9
It will be led to TV3 via b, and will be led to VTR1 in the meantime. That is, it is inevitably guided by the VTR 1 via the switching switches 7a and 7b.

When the television signal of VTR1 is decoded, the switching switches 7a and 7b and the input switching switch 8 are switched in the opposite states to those shown in FIG.

As a result, the television signal output from the tuner circuit 1b is input to the decoder 2 via the switching switch 7a and is decoded there. The decoded signal is taken out from the video output cable 1d via the switching switch 7b, the VTR input switching switch 8 and the video signal processing circuit 1a.

As is clear from the above, when the signal of TV3 is introduced into the decoder 2, it is led to VTR1 by the input signal cable 9a and the output signal cable 9b. Therefore, the VTR 1 requires terminals for connecting the input signal cable 9a and the output signal cable 9b, and the TV 3 also needs terminals for the input signal cable 9a and the output signal cable 9b.

[Problems to be solved by the invention]

Since the conventional connection system for the VTR, the TV and the decoder is constructed as described above, not only the connection between the TV3 and the VTR1 becomes complicated, but also the TV3 must be provided with a connector for connecting the decoder 2.

In other words, in the VTR1, the TV is connected via the VTR1 by the new circuit.
Even if the decoder 3 and the decoder 3 can be connected, the problem is that the TV 3 must also have a new circuit.

The present invention has been made to solve the above problems, and a magnetic recording / reproducing apparatus which can be connected to a conventional TV as it is and can be connected to a TV without increasing the connection cable. The purpose is to get.

[Means for solving problems]

A magnetic recording / reproducing apparatus according to the present invention is provided in a recording / reproducing apparatus, and is a decoder input switch for connecting a television video device to a device for decoding a television signal from the television video device through a video input cable and a video output cable. A switch and a decoder output switching switch, and a video that is connected to the video input cable and the video output cable when the video input cable and the video output cable of the recording and reproducing apparatus are used as normal input and output terminals provided in the recording and reproducing apparatus. The recording / reproducing is performed by selecting any one of the input switching switch and the video output switching switch, the signal from the video input switching switch, the television signal from the recording / reproducing device and the signal from the decoder output switching switch. Device video signal It is provided with a a VTR input switch to direct sense circuit.

[Action]

In the present invention, when decoding a television signal from a television image device, the decoding switching switch, the video input switching switch and the video output switching switch are switched to the device side which decodes the television signal to pass through this device. When the video output cable of the recording / playback device is led to the outside and the video input cable and the video output cable are used as normal input / output terminals of the recording / playback device, the video input switch is switched to the video input cable side and the video output is switched. The switch is switched to the video output cable side, and the video signal of the recording / reproducing apparatus is input from the video input cable and led out to the outside from the video output cable.

〔Example〕

Embodiments of a magnetic recording / reproducing apparatus of the present invention will be described below with reference to the drawings. Figure 1 shows the VTR, TV,
It is a block diagram which shows the connection system of a decoder. This first
In the figure, the same parts as those in FIG.

In FIG. 1, 1 is a VTR, 2 is a decoder, 3 is a TV, VTR1 and TV3 are connected by a video signal connecting cable 4, and VTR1 and TV3 are RF signal connecting cables 6.
Connected by.

Decoder connection cable 5 connects the VTR 1 and the decoder 2.

According to the switching circuit of the present invention, the VTR1 and the decoder 2
It is possible to realize both the case of connecting the TV 3 and the case of connecting the TV 3 and the decoder 2 as shown in FIG. This detailed signal flow is
It will be described with reference to the drawings.

This FIG. 2 corresponds to the conventional FIG. 4. In FIG. 2, the same parts as those in FIG. 1a is a video signal processing circuit, 1b is a tuner circuit, 1c is a video input cable, and 1d is a video output cable.

A VTR input selector switch 8 is inserted between the tuner circuit 1b and the video signal processing circuit 1a so that the video output can be taken out from the video signal processing circuit 1a through the video output switching switch 7d and the video output cable 1d. ing.

That is, the VTR input selector switch 8 has the movable terminal 81 connected to the input end of the video signal processing circuit 1a, and has three fixed terminals.
82 to 84, and the fixed terminal 82 is connected to the fixed terminal 7b ₂ of the decoder switching switch 7b. The fixed terminal 83 is connected to the output end of the tuner circuit 1b. The fixed terminal 84 is connected to the fixed terminal 7c ₃ of the video input switching switch 7c.

The movable terminal 7d ₁ of the video output switching switch 7d is connected to the video output cable 1d. This video output switching switch 7d has two fixed terminals 7d ₂ and 7d ₃ , and the fixed terminal 7d ₂ is connected to the fixed terminal 7b ₃ of the decoder switching switch 7b.

The above video input cable 1c is a video input switching switch 7c
Is connected to the movable terminal 7c ₁ of the fixed terminal 7c ₂ of the video input switching switch 7c is connected to the fixed terminal 7a ₃ of the decoder switching switch 7a.

Decoder switching switches 7a and 7b are movable terminals 7a ₁ and 7b, respectively.
_{It has one} and two fixed terminals 7a ₂ , 7a ₃ , 7b ₂ , 7b ₃ ,
Each movable terminal 7a ₁ and 7b ₁ is connected to the decoder 2.

The fixed terminal 7a ₂ of the decoder switching switch 7a is the tuner circuit 1
Decoder switching switch 7b
The fixed terminal 7b _{3 of} is the fixed terminal 7 of the video output switching switch 7d.
Connected to d ₂ .

In FIG. 2, first, the state in which the decoder 2 is connected to the TV 3 will be described. TV3 tuner output is V
Input from TR1 video input cable 1c, the movable terminal 7c ₁ video input switching switch 7c, the fixed terminal 7c _2, the decoder switching switch 7a of the fixed terminals 7a _3, is inputted to the movable terminal 7a ₁ to through connexion decoder 2.

The tuner output input to this decoder 2 is decoded there, and the decoded signal is the decoder switching switch.
Movable terminal 7b ₁ of 7b, the fixed terminal 7b _3, the fixed terminal 7d ₂ video output switching switch 7d, is input to TV3 via a video output cable 1d of the movable terminal 7d ₁ and VTR 1.

Next, connect the video input cable 1c and the video output cable 1d to V
When used as video input / output of TR1, the movable terminals 7a ₁ and 7b ₁ of the decoder switching switches 7a and 7b are switched to the fixed terminals 7a ₂ and 7b ₂ side, respectively, and the movable terminal 7c ₁ of the video input switching switch 7c is switched. Switching to the fixed terminal 7c ₃ side, further, the movable terminal 7d ₁ of the video output switching switch 7d is switched to the fixed terminal 7d ₃ side and to the side opposite to that shown in FIG. Further, the movable terminal 81 of the VTR input selector switch 8 is switched to the fixed terminal 84 side.

At this time, the video input signal of VTR1 is the video input cable 1c in the VTR1 and the movable terminal 7 of the video input switching switch 7c.
c ₁ , fixed terminal 7c ₃ , fixed terminal 84 of VTR input selector switch 8,
The signal is output to the outside of the VTR 1 via the movable terminal 81, the video signal processing circuit 1a, the fixed terminal 7d ₃ of the video output switching switch 7d, the movable terminal 7d ₁ and the video output cable 1d.

Further, in the case of decoding the television signal of the VTR1 is fixed terminal 7 the movable pin 7a ₁ of the decoder switching switch 7a
a ₂ side, the movable terminal 7b of the decoder switching switch 7b
₁ is switched to the fixed terminal 7b ₂ side, the movable terminal 81 of the input switching switch 8 is switched to the fixed terminal 82 side, and further, the movable terminal 7d ₁ of the video output switching switch 7d is switched to the fixed terminal 7d ₃ side.

As a result, the television signal from the tuner circuit 1b of the VTR 1 is input to the decoder 2 via the decoder switching switch 7a, is decoded there, and is then decoded.
7b ₁ , a VTR input selector switch 8, a video signal processing circuit 1a, a video output selector switch 7d, and a video output cable 1d, and is led to the outside.

In this way, by providing the decoder changeover switches 7a, 7b, the video input changeover switch 7c, the video output changeover switch 7d, and the VTR input changeover switch 8 and configuring them as shown in FIG. It is possible to realize the connection between the TV 3 and the decoder 2 by using.

The above embodiment is an example for signal switching.
Other switching methods for guiding the signals from the video input / output terminals (video input cable 1c, video output cable 1d) to the decoder can also be realized, and if the same effect as the above embodiment can be obtained. , The generality of the present invention is not lost.

Further, the connected signal may be a video signal and an audio signal, or one of a video signal and an audio signal.

Further, in the above embodiment, an encoder may be used instead of the decoder 2.

〔The invention's effect〕

As described above, the present invention is configured so that the VTR is switched between the TV output signal and the TV output signal by the decoder switching switch, the video input switching switch, the video output switching switch and the VTR switching switch. Therefore, even in the conventional TV, the TV and the decoder can be connected via the VTR by only switching the VTR switch, which has the effect of eliminating the complexity of the connection.

[Brief description of drawings]

FIG. 1 is a block diagram showing a connection system of a VTR, a TV and a decoder in a magnetic recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a circuit diagram showing the connection state of the magnetic recording / reproducing apparatus of the same as above, and FIG. 3 is a VTR, TV, in the conventional magnetic recording / reproducing apparatus.
FIG. 4 is a block diagram showing the connection system of the decoder, and FIG. 4 is a circuit diagram showing the connection state of the conventional magnetic recording / reproducing apparatus. 1 ... VTR, 1a ... video signal processing circuit, 1b ... tuner circuit, 2 ... decoder, 3 ... TV, 4 ... video signal connection cable, 5 ... decoder connection cable, 6 ... RF connection cable, 7a, 7b ... decoder Switching switch, 7c ... Video input switching switch, 7d ... Video output switching switch, 8 ... Input switching switch. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A television image device, a recording / reproducing device having a video input cable and a video output cable and capable of receiving a television signal, and a television signal from the television image device or from the recording / reproducing device. A device for decoding a television signal, and a decoder input switch which is provided in the recording / reproducing device and is led to a device for decoding the television signal from the television video equipment or the recording / reproducing device and is led to the outside through the video output cable. A switch and a decoder output changeover switch, and when the video input cable and the video output cable are used as normal input and output terminals, the video input signal of the recording / reproducing apparatus is led from the video input cable and externally from the video output cable. Cut to derive Select any one of the following video input changeover switch and video output changeover switch, a signal from the video input changeover switch, a television signal from the recording / reproducing apparatus, and a signal from the decoder output changeover switch, A magnetic recording / reproducing apparatus having a VTR input selector switch leading to a video signal processing circuit of the recording / reproducing apparatus.