JPH10308885A - Television signal changeover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To select a plurality of television signals with a simple circuit configuration. SOLUTION: A changeover device is provided with a 1st changeover means 10 that receives at least two signals among a plurality of television signals and with a 2nd changeover means 20 that receives at least two signals among output signals of the 1st changeover means 10 so as to select a number of signals without increasing the circuit size and without making the circuit complicated, and recording of a competitive program on a different channel is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a television signal switching device.

[0002]

2. Description of the Related Art Conventionally, when switching a plurality of television signals, for example, a configuration as shown in FIG. 5 has been used. In FIG. 5, reference numeral 10 denotes first switching means, 21 denotes a first switch, 22 denotes a second switch, and 23 denotes a third switch, which switches a plurality of television signals a1 to a7 and outputs signals c1 to c4. FIG. Here, a1 is the first video signal from the external input, a2 is the second video signal from the external input, a3 is the third video signal from the external input, a4 is the output signal of the first UV tuner, and a5 is the BS signal. Tuner output signal, a
6 is an output signal of the NTSC video signal conversion means and the like, and a7 is an output signal of the second UV tuner.
A case will be considered in which the output signal c1 to the main screen display device and the like, the output signal c2 to the sub screen display device and the like, the output signal c3 to the external monitor output terminal and the like, and the output signal c4 to the character information display device and the like are output. The operation will be described below. The character information includes an output signal a4 of the first UV tuner, an output signal a5 of the BS tuner, and an output signal a5 of the second UV tuner.
7 is included.

[0003] c1 and c3 are the first switching means 10
Becomes one of the signals a1 to a6 switched. c2 is a signal in which one of the signals a1 to a6 switched by the first switching means 10 and a7 are switched by the first switch 21. Further, a5 and a7 are switched by the second switch 22, and the output signal of the second switch 22 and the output signal of the first switching means 10 are switched by the third switch 23 to include character information. It becomes signal c4. That is, the first switching means 10, the first switch 21, the second switch 22, and the third
C1 is one of a1 to a6
C2 becomes one of the signals a1 to a7 independently of c1, and c3 becomes a signal independently of c1 and c2.
1 to a6, and c4 is a5 or a7.
Or a switched by the first switching means 10
4 is a signal including any one of the character information.

[0004]

However, in the conventional configuration shown in FIG. 5, the number of signals to be switched, which is the input signal of the television signal switching device, depends on the number of input terminals of the first television signal switching means 10. If the number of signals to be selected is larger than the number of signals or the number of signals to be selected as output signals of the television signal switching device, the first switching means 1
If the number of output terminals is larger than the number of output terminals, the first switch 21 and the second switch 2
2. It is necessary to provide a third switch 23 and the like. Also,
c3 cannot be a7. That is, this is c1
If c2 or c4 is a4, c3 cannot be a terrestrial broadcast signal other than a4, and the program cannot be back-recorded.

[0005]

A first switching means for inputting at least two of the plurality of television signals, and at least two of the plurality of television signals and an output signal of the first switching means. And a second switching means for inputting two signals.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a second aspect of the present invention, there is provided a first switching means for inputting at least two of a plurality of television signals; And a second switching means for inputting at least two of the output signals of the switching means. It can be switched, and has the effect of enabling reverse recording.

According to a third aspect of the present invention, there is provided a high-definition / NTSC conversion means for converting a high-definition signal into an NTSC signal, and an output signal of the high-definition / NTSC conversion means and at least two of the plurality of television signals. And first switching means for inputting at least two of the plurality of television signals, an output signal of the first switching means, and an output signal of the high definition / NTSC conversion means. The television signal switching device according to the present invention is characterized in that a plurality of television signals can be switched with a simple circuit configuration, and that a reverse recording is enabled.

According to a fourth aspect of the present invention, there is provided a MUSE / NTSC conversion means for converting a MUSE signal into an NTSC signal, and an output signal of the MUSE / NTSC conversion means and at least two of a plurality of television signals. First switching means for performing the operation, the plurality of television signals, the output signal of the first switching means, and the MUSE
A television signal switching device comprising second switching means for inputting at least two signals out of the output signals of the / NTSC conversion means, wherein a plurality of television signals are provided with a simple circuit configuration. Can be switched, and it has the effect of enabling reverse recording.

According to a fifth aspect of the present invention, there is provided a digital-to-analog converter for converting a digital signal into an analog signal;
First switching means for inputting an output signal of the A conversion means and at least two of the plurality of television signals; a plurality of television signals; an output signal of the first switching means; and the D / A conversion A television signal switching device comprising a second switching means for inputting at least two of the output signals of the means. The television signal switching apparatus can switch a plurality of television signals with a simple circuit configuration. , And has the effect of enabling secret recording.

Hereinafter, a television signal switching device according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of a television signal switching apparatus according to the first and second aspects of the present invention. FIG. 1 shows an example in which a plurality of television signals a1 to a7 are switched to obtain signals c1 to c4, as described in the related art. Here, a1 is the first video signal from the external input, a2 is the second video signal from the external input, a3 is the third video signal from the external input, a4 is the output signal of the first UV tuner, and a5 is the BS signal. Output signal of tuner, a6 is NTSC
The output signal of the video signal conversion means and the like, a7 is the output signal of the second UV tuner, and these signals are output signal c1 to the main screen display device and the like, output signal c2 to the sub screen display device and the like, external monitor It is assumed that the output signal c3 to an output terminal or the like and the output signal c4 to a character information display device or the like are output. It is also assumed that the character information is included in the output signal a4 of the first UV tuner, the output signal a5 of the BS tuner, and the output signal a7 of the second UV tuner.

In FIG. 1, reference numeral 10 denotes first switching means, reference numeral 20 denotes second switching means, and a plurality of television signals a1 to a6 are switched by the first switching means 10, and c1, b1, b2, b3 is obtained. Further, b
1, b2, b3, a5, a6 and a7 are switched by the second switching means 20 to obtain c2, c3 and c4. In other words, c1 becomes one of the signals a1 to a6 when the first switching means 10 switches a1 to a6.
c2 is a signal of one of a1 to a7 independently of c1 by switching between b2 and a7 by the second switching means 20. c3 is the second switching means 20 and b1, b2,
Switching between a5, a6, and a7 results in one of the signals a1 to a7. c4 may be any one of signals a4, a5, and a7 containing character information. a
4 and a7 are terrestrial broadcast signals, and the first UV
The same signal can be obtained depending on how the tuner and the second UV tuner are selected. If c4 is to be a4 and there is no a4 in b1, b2 and b3, a
The second UV tuner may be selected so that 7 becomes the same as a4.

According to the above configuration, a large number of signals can be switched without increasing the circuit scale and without complicating the circuit, and secret recording can be performed.

(Embodiment 2) FIG. 2 is a block diagram showing a television signal switching apparatus according to the first and third aspects of the present invention. The basic configuration and operation are the same as in the first embodiment. The difference is that a Hi-Vision / NTSC conversion means 30 for converting a Hi-Vision signal into an NTSC signal has been added. The high vision / NTSC conversion means 30 receives the high vision signal a6 as input, converts it into an NTSC signal a6 ', and supplies it to the first switching means 10 and the second switching means 20.

By doing so, it is possible to switch a large number of signals including high-definition without complicating the circuit, and it is also possible to perform reverse recording and the like.

(Embodiment 3) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram showing a television signal switching apparatus according to the first and fourth aspects of the present invention. The basic configuration and operation are the same as in the first embodiment. The difference is that the MUSE converts the MUSE signal to an NTSC signal.
E / NTSC conversion means 40 is added.
The MUSE / NTSC conversion means 40 receives the MUSE signal a6 as input, converts it into an NTSC signal a6 ', and supplies it to the first switching means 10 and the second switching means 20.

By doing so, it is possible to switch a large number of signals including MUSE without complicating the circuit, and it is also possible to perform reverse recording and the like.

(Embodiment 4) FIG. 4 is a block diagram showing a television signal switching apparatus according to the first and fifth aspects of the present invention. The basic configuration and operation are the same as in the first embodiment. The difference is that a D / A converter 50 for converting a digital signal into an analog signal is added. The D / A conversion means 50 receives the digital signal a6 as input, converts it into an analog signal a6 ', and supplies the analog signal a6' to the first switching means 10 and the second switching means 20.

By doing so, it is possible to switch a large number of signals including digitally supplied signals without complicating the circuit, and it is also possible to perform secret recording and the like.

In the first, second, third and fourth embodiments of the present invention, the number of input / output terminals of the first switching means 10 and the second switching means 20 is set to 6 inputs and 3 outputs. But that's not all. In addition, HD /
The HDTV signal is converted to NT by the NTSC conversion means 30.
SC signal conversion, MUSE / NTSC conversion means 4
Although the MUSE signal is converted to an NTSC signal by 0, the input of the first switching means 10 and the second switching means 20 is an NTSC signal. However, the present invention is not limited to this. May be replaced by
Also, the HD / NTSC conversion means 30 and the MUS
The input of the E / NTSC conversion means 40 and the D / A conversion means 50 is a6, but the input is not limited to a6, and may be another input or a plurality of inputs.

[0022]

As described above, according to the television signal switching apparatus of the present invention, by switching a plurality of television signals by a plurality of switching means, the circuit scale is not increased and the circuit is complicated. It is possible to switch a large number of signals without performing, and also to perform secret recording.

[Brief description of the drawings]

FIG. 1 is a block diagram of a television signal switching device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a television signal switching device according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a television signal switching device according to a third embodiment of the present invention.

FIG. 4 is a block diagram of a television signal switching device according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a conventional television signal switching device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st switching means 20 2nd switching means 21 1st switch 22 2nd switch 23 3rd switch 30 Hi-Vision / NTSC conversion means 40 MUSE / NTSC conversion means 50 D / A conversion means

Claims (5)

[Claims] 1. A television signal switching device, wherein a plurality of television signals are switched by a plurality of switching means. 2. A first switching means for inputting at least two signals among a plurality of television signals, and at least two signals among the plurality of television signals and an output signal of the first switching means. A television signal switching apparatus, comprising: 3. Hi-Vision / NTSC converting means for converting a Hi-Vision signal into an NTSC signal, and first switching means for inputting at least two signals of an output signal of the Hi-Vision / NTSC converting means and a plurality of television signals. , The plurality of television signals and the first
Output signal of the switching means and the HD / NTS
A television signal switching device, comprising: a second switching unit for inputting at least two signals among output signals of the C conversion unit. 4. A MUSE / NTSC conversion means for converting a MUSE signal into an NTSC signal, and said MUSE / NTS conversion means.
First switching means for inputting an output signal of the C conversion means and at least two of the plurality of television signals; an output signal of the plurality of television signals, an output signal of the first switching means, and the MUSE / NTSC conversion; A television signal switching device, comprising: a second switching means for inputting at least two signals among output signals of the means. 5. D / A conversion means for converting a digital signal into an analog signal, and first switching means for inputting an output signal of the D / A conversion means and at least two of a plurality of television signals. , The plurality of television signals, the output signal of the first switching means and the D /
A television signal switching device, comprising: a second switching means for inputting at least two signals out of the output signals of the A conversion means.