JPH0884054A - Input switching device - Google Patents

Abstract

PURPOSE: To preferentially perform the switching to a signal source to be used many times, in an input switching device where the switchings to four kinds of signal sources, for instance, are possible. CONSTITUTION: By outputting switching control signals 14a and 14b from a switching control means 2 at the same time when the counting of a count means 15 is started by the operation of an input changeover switch 12, an input signal switching means 1 is switched. When the operation of the input changeover switch 12 is performed within counting time, the switching control means 2 imparts a switching control signal successively switching an input signal in order of TV1, TV2, outside 1, and outside 2 to the input signal switching means 1. When the operation of the input changeover switch 12 is performed after the counting time passes or in a state that a counting termination signal is outputted, the switching control means 2 imparts the switching control signal switching at least two input signals with high use frequency of input signals to TV1 to/-from TV2, for instance, to the input signal switching means 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a VTR, TV, AV
The present invention relates to an input switching device having an input terminal such as a selector and having an input switching function.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional input switching device for a VTR which can select, for example, four video signal sources (TV1, TV2, external 1, external 2). In the figure, reference numeral 1 denotes an input signal switching means for detecting a switching control signal and selecting one of four video signal sources to output the video signal.
9 and 10 are RF supplied from a cable or an antenna
Signals, 7 and 8 are FS tuners, 3 are FS tuners 7
, 4 is a video signal generated by the FS tuner 8, 5 is an external 1 video signal,
Reference numeral 6 is a video signal from the outside 2, 11 is a video signal output from the input signal switching means 1, 2 is switching control means constituted by a microprocessor or the like, 14a and 14b are switching control signals generated by the switching control means 2, 12 Is an input selector switch, and 13 is a signal from the input selector switch 12.

Next, the operation will be described. When the input changeover switch 12 is pushed, the changeover control means 2 detects the signal 13 from the input changeover switch 12, and the changeover control signal 14
a and 14b are generated. The input signal switching means 1 selects one of the four video signal sources according to the pattern of the switching control signals 14a and 14b and outputs the video signal 11. The patterns of the switching control signals 14a and 14b and the video signal sources selected by the patterns are as follows.

[0004]

The switching control means 2 changes the pattern of the switching control signals (14a, 14b) (0,
0)->(0,1)->(1,0)->(1,1)->
Since it is configured to change in the order of (0, 0), the signal source of the video signal output by the input signal switching means is TV1->TV2->external1->external2-> TV1.
It switches in the order of. As a switching device of this kind,
For example, there is one disclosed in Japanese Patent Laid-Open No. 2-295218.

[0006]

When using the system as described above, the TV 1 and the TV 2 are usually heavily used, and the external 1 and the external 2 are often used only in a limited case. However, in order to switch from TV2 to TV1 with the above-mentioned configuration, it is necessary to make sure that external 1-> external 2-> TV1. Therefore, it is necessary to perform the switch operation three times, which is troublesome to switch. There was a problem.

The present invention has been made to solve the above problems, and an object thereof is to obtain an input switching device which can be preferentially selected according to the frequency of use.

[0008]

An input switching device according to the present invention supplies an input signal switching means for selecting and outputting one of at least three input signals, and a switching control signal for the input signal switching means. Switching control means, counting a predetermined time in response to a request from the switching control means, resetting the count after the lapse of the predetermined time and at the same time notifying the switching control means of a count end signal, and an input operated by the user. When the operation of the input changeover switch is performed within the count time, the changeover control means gives the input signal changeover means a changeover control signal for sequentially changing over the input signal every operation of the input changeover switch. Further, when the input changeover switch is operated after the count time has elapsed, the changeover control means causes the specific input of the input signals. It has been made to provide a switching control signal for switching the signal to the input signal switching means.

Further, in the above structure, when the operation of the input changeover switch is performed after the count time has elapsed, the changeover control means changes the input signal to the changeover control signal for switching between at least two frequently used input signals. It is designed to give means.

Further, an input signal switching means for selecting and outputting one of at least three input signals, a switching control means for supplying a switching control signal to the input signal switching means, and a request from the switching control means. Counting a predetermined time according to the above, resetting the count after the lapse of the predetermined time, and at the same time, counting means for notifying the changeover control means of a count end signal, input changeover switch operated by the user, and specific changeover control connected to the changeover control means. When the input changeover switch is operated within the count time, the changeover control means sequentially changes over the input signal each time the input changeover switch is operated, and outputs the changeover control signal to the input signal changeover means. In addition, when the input selector switch is operated after the count time has elapsed, the selector control means makes a memo. It has been made to provide an input signal switching means switching control signal stored in over means.

Further, in the above structure, the memory means is configured to be set by the memory switch to the switching control signal which the switching control means is currently giving to the input signal switching means.

In the above construction, at least three input signals are separated into a video signal and an audio signal, respectively, and the input signal switching means is divided into a video signal switching means and an audio signal switching means. Also, the switching control signal is patterned.

[0013]

In the input changeover device according to the present invention, the input changeover switch is operated to start counting by the counting means and at the same time issue the changeover control signal from the changeover control means to change over the input signal changeover means. When one operation is performed within the count time, the switching control means gives the input signal switching means a switching control signal for sequentially switching the input signals as TV1->TV2-> external 1-> external 2. ,
On the other hand, after the count time has elapsed after the input selector switch is operated,
That is, when the counting end signal is output, the switching control means inputs the switching control signal for switching between at least two frequently used input signals, for example, TV1 <-> TV2. It is given to the signal switching means. Therefore, it is not necessary to repeatedly perform the input switching operation when selecting the frequently used input.

Further, the switching control means is connected to a memory means in which a specific pattern of the switching control signal is stored, and when one operation of the input changeover switch is performed within the count time, the switching control means is operated. A switching control signal for sequentially switching the input signals is given to the input signal switching means. On the other hand, when the input switching switch is operated after the count time has elapsed, the switching control means has the same pattern as that stored in the memory means. Since the changeover control signal is applied to the input signal changeover means, the minimum input changeover switch operation can be achieved by setting the memory content to a pattern for selecting one input which is most frequently used, for example, TV. The TV can be selected by the number of times.

[0015]

【Example】

Example 1. FIG. 1 shows an embodiment of the present invention and shows an input switching device for a VTR capable of selecting, for example, four video signal sources (TV1, TV2, external 1, external 2). In FIG. 1, parts that are substantially the same as those in FIG. In FIG. 1, 15 is a counting means for counting an arbitrarily set time, 1
6 is a count request signal generated by the switching control means 2, 17
Is a count end signal generated by the counting means 15. Immediately after detecting the count request signal 16, the counting means 15 performs counting for, for example, 8 seconds, and when the counting of 8 seconds is completed, a count end signal 17 is generated. When the count request signal 16 is detected again within 8 seconds without counting, the count value is reset and counting for 8 seconds is started again. A timing chart of the count request signal 16 and the count end signal 17 is shown in FIG. The switching control means 2 is composed of a microprocessor and operates according to an incorporated program.

Next, the operation will be described. When the input changeover switch 12 is pushed, the changeover control means 2 detects the signal 13 from the input changeover switch 12, and the changeover control signal 14
The patterns of a and 14b are changed. Switching control signal (1
4a, 14b) is (0, 0) or (0,
When it changes to 1), the switching control means 2 generates the count request signal 16. The counting means 15 starts counting the elapsed time immediately after detecting the count request signal 16, and generates a count end signal 17 when counting 8 seconds, for example. After that, the switching control means 2 performs the program processing to detect the signal 13, and the patterns of the switching control signals 14a and 14b and the count end signal 17 are detected.
The pattern of the switching control signals 14a and 14b to be generated is determined according to two conditions of whether or not is detected, and the signal is generated.

FIG. 3 is an example of a flow chart showing the program processing of the switching control means 2 when the input changeover switch 12 is pushed. 3 will be described. First, S
At 401, it is determined whether the input changeover switch 12 has been pressed. If it is determined that the input changeover switch 12 has not been pressed, no processing is performed. If it is determined that the button has been pressed, the counting means 15 is next operated in S402.
Determines whether the count end signal 17 is generated. If it is determined that the count end signal 17 is generated, the process proceeds to S403. If it is determined that the count end signal 17 is not generated, the process proceeds to S408.
Hereinafter, the processing of S403 to S407 is performed by the switching control signal (1
4a, 14b) is a process of alternately generating patterns (0, 0) and (0, 1), that is, a process of selecting the frequently used TV1 and TV2, and the processes of S408 to S413 are the switching control signal (14a , 14b) the pattern (0, 0)
->(0,1)->(1,0)->(1,1)->
This is a process of unconditionally changing in the order of (0, 0).

In S403, the pattern of the switching control signal (14a, 14b) currently output is (0, 0).
If it is (0, 0), the process proceeds to S404, the switching control signal (0, 1) is generated, the count request signal 16 is generated in S405, and the process is ended. If it is not (0, 0), the process proceeds to S406, and it is determined whether the pattern of the switching control signal (14a, 14b) is (0, 1). If (0, 1), S
407, the switching control signal (0, 0) is generated, and S
At 405, the process of generating the count request signal 16 is performed, and the process ends. If not (0, 1), S410
Move to

In S408, the pattern of the switching control signal (14a, 14b) currently output is (0, 0).
If it is (0, 0), the process proceeds to S404, the switching control signal (0, 1) is generated, the count request signal 16 is generated in S405, and the process is ended. If not (0, 0), the process proceeds to S409.
In S409, it is determined whether or not the pattern of the switching control signal (14a, 14b) currently output is (0, 1). If (0, 1), the process proceeds to S413, and the switching control signal (1, 0 ) Is generated and the process ends. (0,
If not 1), the process proceeds to S410. In S410, the switching control signal (14a, 14b) currently being output
Discriminates whether the pattern of (1, 0) is (1, 0)
If so, the process shifts to S412, the switching control signal (1, 1) is generated, and the process ends. If it is not (1, 0), it is clear that (1, 1) is currently occurring, so
The process proceeds to S411, the switching control signal (0, 0) is generated, and the process ends.

When the switching control means 2 performs the processing for changing the patterns of the switching control signals 14a and 14b as described above, the input signal switching means 1 switches the four video signal sources by the transition as shown in FIG. To do. That is, in FIG. 4, when the input selector switch 12 is pressed after waiting for 8 seconds or longer after the selection is switched to either TV1 or TV2, the TV1 <---> TV2 is always switched. Therefore, it is not necessary to switch to the external 1 and the external 2. Further, when it is desired to switch to the outside, it suffices to press the input selector switch 12 again within 8 seconds after selectively switching to either TV1 or TV2. If the input selector switch 12 is pressed again within 8 seconds after switching from the external 2 to the TV 1, the external 1 is not switched to the TV 2.

Example 2. FIG. 5 shows another embodiment of the present invention. The same parts as those in FIG. In the figure, reference numeral 1a is an audio signal switching means to which the audio signals L and R components transmitted from four audio sources TV1, TV2, external 1 and external 2 are input. 21, 23, 25 and 27 are TVs
1, TV2, external 1, external component R component of the audio signal 22, 24, 26, 28 are TV1, TV respectively
2, the L component of the external 1 and the external 2 audio signals.
One of the four audio sources is selected and the L component 30 and the R component 31 of the audio signal are output. 1b
Is a video signal switching means, which is the same as the input signal switching means 1 in FIG. The switching control signals 14a and 14b generated by the switching control means 2 are configured so that the same signal is sent to both the audio signal switching means 1a and the video signal switching means 1b. This switching control signal 1
The audio signal switching means 1a and the video signal switching means 1b select and output one of the four audio and video signal sources by 4a and 14b. Switching control signal 14
The patterns of a and 14b and the video signal sources and audio signal sources selected by them are as shown in the following table.

[0022]

[0023]

Next, the operation will be described. The operation of the counting means 15 in this embodiment is the same as that in the first embodiment. Further, when the input changeover switch 12 is pressed, the program process performed by the changeover control means 2 is as shown in the flowchart of FIG. 3 and is similar to that of the first embodiment. Therefore, when the input selector switch 12 is pressed, the transitions of the audio signal source selected by the audio signal switching unit 1a and the video signal source selected by the video signal switching unit 1b are as shown in FIG. Has the same effect.

Example 3. FIG. 6 shows another embodiment of the present invention. The same parts as those in FIG. In the figure, 4 is an external 1 video signal, 5
Is an external 2 video signal, and 6 is an external 3 video signal. Reference numeral 15 is a counting means, 16 is a count request signal, 1
Reference numeral 7 denotes a count end signal, which is the same as that used in FIGS. 31 is a memory switch, 32 is a signal from the memory switch 31, and 18 is a TV, an external device 1, by pressing the memory switch 31.
Memory means capable of storing the pattern of the switching control signals 14a, 14b corresponding to one of the external 2 and the external 3,
Reference numerals 19 and 20 show the flow of data transfer between the switching control means 2 and the memory means 18. Counting means 1
The operation of No. 5 is similar to the operation described in the first embodiment. Further, the switching control means 2 is constituted by a microprocessor as in the first and second embodiments, and operates by a built-in program. Switching control signals 14a, 1
The pattern of 4b and the video signal source selected by it are as follows.

[0026]

Next, the operation will be described. First of all,
The memory operation will be described. Memory switch 31
When is pressed, the switching control means 2 writes the pattern of the switching control signals 14a and 14b currently being generated in the memory means 18 in response to the signal 32. For example, when the pattern of the switching control signal (14a, 14b) is (0, 0), (0, 0) is written. Only one type of switching control signal pattern can be stored in the memory means 18, and when a pattern different from the currently stored pattern is stored by the memory operation, the previously stored pattern is erased.

Next, the input switching operation will be described. When the input changeover switch 12 is pressed, the changeover control means 2 detects the signal 13 from the input changeover switch 12 and generates a count request signal 16. Then, the pattern of the switching control signals 14a and 14b stored in the memory means 18 is read out, and the switching control signal generated according to the two conditions of the pattern and whether or not the counting means 15 is currently generating the count end signal. The patterns of 14a and 14b are determined and their signals are generated.

FIG. 7 is a flow chart of the program processing of the switching control means 2 when the input switch 12 is pushed. Hereinafter, FIG. 7 will be described. First, in 801, it is determined whether or not the input changeover switch 12 has been pressed. If it is determined that the input switch 12 has been pressed, the process proceeds to 802, and if it is determined that the switch has not been pressed, the process ends without performing any processing. At 802, it is determined whether the counting means 15 is generating the count end signal 17. If it is determined that it has occurred, the process proceeds to 803, and if it is determined that it has not occurred, the process proceeds to 807. In 803,
The pattern of the switching control signal stored in the memory means 18 is read out, and at 804, the currently generated switching control signal is the pattern of the switching control signal (14a, 14b) stored in the memory means 18, for example, ( 0,
0) and whether or not it matches. If they match, the process proceeds to 807, and if they do not match, the switching control signals 14a and 14b having the same pattern as the pattern read from the memory means 18 are generated in 805, and the count request signal 16 is generated in 806, and the process ends. . 80
2 or from 804 to 807, 807 ~
In the processing of 813, the switching control signals (14a, 14a
If b) is currently (0,0), then (0,1)
When it is (0, 1), it is (1, 0), when it is (1, 0), it is (1, 1), and when it is (1, 1), it is (0,
0) is generated, a count request signal is finally generated, and the process ends.

The switching control means 2 performs the processing for changing the patterns of the switching control signals 14a and 14b as described above, so that the input signal switching means 1 switches four video signal sources, for example, as shown in FIG. According to the transition. That is, after selecting outside 1, outside 2, and outside 3,
For example, if the input changeover switch 12 is pressed after 8 seconds or more has elapsed, the changeover control signal pattern stored in the memory means 18 is always switched to, for example, the TV. Therefore, when the external 1 is desired to be switched to the TV, the input is switched. It is possible to switch to the TV by pressing the switch 12 once.

Example 4. FIG. 9 shows another embodiment of the present invention. The same parts as those in FIG. In the figure, 23 and 2 are different from FIG.
4 is an external 1 audio signal, 25 and 26 are external 2 audio signals, 27 and 28 are external 3 audio signals,
4 is an external 1 video signal, 5 is an external 2 video signal, 6
Is an external 3 video signal. Also, the memory means 18 and the memory switch 3 used in the third embodiment are used.
1 has been added. The video signal sources and audio signal sources selected by the switching control signals 14a and 14b generated by the switching control means 2 are shown in the following table.

[0032] Next, the operation will be described. The operation of the counting means 15 in this embodiment is the same as that in the first embodiment.
Further, when the input changeover switch 12 is pressed, the process performed by the changeover control means 2 is as shown in the flowchart of FIG. 7, and is the same as that of the third embodiment. Further, the memory operation when the memory switch 31 is pressed is the same as the operation in the third embodiment. Therefore, when the input selector switch 12 is pressed, the transitions of the audio signal source selected by the audio signal switching means 1a and the video signal source selected by the video signal switching means 1b are both as shown in FIG. 8, for example. The same effect as in Example 3 is obtained.

In the above four embodiments, the input switching device capable of selecting four signal sources is used. However, when the input switching device capable of selecting three or five or more signal sources is used. Needless to say, the same effect can be obtained.

Further, although the types of signals are limited to two types, that is, the video signal and the audio signal in the above four embodiments, the same effect can be obtained when the input switching device is constructed by using the other signals.

[0035]

As described above, according to the present invention, the switching to a specific input signal or two frequently used input signals can be preferentially performed with respect to other signals. The number of times the switch is pressed at the time of switching is reduced, which has the effect of improving operability.

Also, in an operation mode in which two signals, a video signal and an audio signal, operate as a pair, switching to two frequently used pairs of input signals has priority over other pairs of input signals. Since it is configured so that it can be done in less than,
This has the effect of improving operability.

Further, since the switching to one frequently used signal is performed preferentially to the other signals, the number of times of pressing the switch is reduced when switching to one frequently used signal, This has the effect of improving operability.

In an operation mode in which two signals, a video signal and an audio signal, operate as a pair, switching to a frequently used pair of input signals takes priority over other pair of input signals. Since it is configured so that it can be performed, the number of times of pressing the switch is reduced when switching to one type of operation mode that is frequently used, and there is an effect that operability is improved.

Further, since the memory contents of the memory means can be easily changed by the memory switch, the resetting is easy even when the frequently used signal source is changed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an input switching device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing timings of a count request signal and a count end signal in the first embodiment of the present invention.

FIG. 3 is a flowchart of a switching control program according to the first and second embodiments of the present invention.

FIG. 4 is a transition diagram of input signal switching according to the first and second embodiments of the present invention.

FIG. 5 is a block diagram showing an input switching device according to a second embodiment of the present invention.

FIG. 6 is a block diagram showing an input switching device according to a third embodiment of the present invention.

FIG. 7 is a flowchart of a switching control program according to third and fourth embodiments of the present invention.

FIG. 8 is a transition diagram of input signal switching according to the third and fourth embodiments of the present invention.

FIG. 9 is a block diagram showing an input switching device according to a fourth embodiment of the present invention.

FIG. 10 is a block diagram showing a conventional input switching device.

[Explanation of symbols]

1 input signal switching means, 1a audio signal switching means, 1b video signal switching means, 2 switching control means, 1
2 input signal changeover switch, 15 counting means, 18
Memory means, 31 memory switch.

Claims (6)

[Claims] 1. An input signal switching means for selecting and outputting one of at least three input signals, a switching control means for supplying a switching control signal to the input signal switching means, and a request from the switching control means. Count the predetermined time accordingly,
After a lapse of a predetermined time, the count is reset and at the same time, the switching control means is provided with a counting means for notifying a count end signal, and an input changeover switch operated by a user,
When the input changeover switch is operated within the count time, the changeover control means provides the input signal changeover means with a changeover control signal for sequentially changing over the input signal each time the input changeover switch is operated. When the input changeover switch is operated after the count time has elapsed, the changeover control means gives a changeover control signal for changing over to a specific input signal among the input signals to the input signal changeover means. Input switching device characterized by being. 2. When the operation of the input changeover switch is performed after the count time has elapsed, the changeover control means gives the input signal changeover means a changeover control signal for switching between at least two frequently used input signals. The input switching device according to claim 1, characterized in that: 3. An input signal switching means for selecting and outputting one of at least three input signals, a switching control means for supplying a switching control signal to the input signal switching means, and a request from the switching control means. Count the predetermined time accordingly,
After the lapse of a predetermined time, the count is reset and at the same time the switching control means is informed of the count end signal, the input switching switch operated by the user, and the memory means connected to the switching control means for storing a specific switching control signal. When the input changeover switch is operated within the count time, the changeover control means provides the input signal changeover means with a changeover control signal for sequentially changing over the input signal every time the input changeover switch is operated, Further, when the input changeover switch is operated after a lapse of the count time, the changeover control means is adapted to give the changeover control signal stored in the memory means to the input signal changeover means. Input switching device. 4. The input switching according to claim 3, wherein the memory means is configured to be set by the memory switch to the switching control signal which the switching control means is currently giving to the input signal switching means. apparatus. 5. The at least three input signals are separated into a video signal and an audio signal, respectively, and the input signal switching means is divided into a video signal switching means and an audio signal switching means. The input switching device according to any one of claims 1 to 4. 6. The input switching device according to claim 1, wherein the switching control signal is patterned.