JP3071267U - Video output control device - Google Patents

Abstract

(57) [Summary] [Problem] Since the setting operation of the RF frequency must be performed after removing the 21-pin cable, deterioration of the workability cannot be avoided. SOLUTION: The microcomputer 12 can be connected in the RF channel setting mode without removing the 21-pin cable B.
Is designed to prevent the output of the AV control signal to the television set 20 via the 21-pin cable B so that the video output based on the RF output can be confirmed. It became possible to improve.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a video output control device, and more particularly, to a video output control device connected to a video output device via two cables, a 21-pin cable and an RF output cable.

[0002]

[Prior art]

 In the conventional video output control device, when setting the RF frequency, the 21-pin cable connected to the television set is removed, so that only the RF output cable is connected to the television set. To play videotape. Then, at the time of video playback, an AV control signal is output to the AV input terminal of the television set via the No. 8 pin of the 21-pin cable, so that the video output based on the RF output is shut off, and the television set monitor is It is possible to prevent a video based on the AV output from being output on the screen. With this method, the user can set the RF frequency while checking the video output based on the RF output on the monitor screen of the television set. As an example of the configuration of a conventional video output control device, a video output control device disclosed in Japanese Utility Model Publication No. 5-14622 is known.

[0003]

[Problems to be solved by the invention]

 In the above-described conventional video output control device, since the setting operation of the RF frequency must be performed after removing the 21-pin cable, deterioration of workability is inevitable. The present invention has been made in view of the above problems, and has as its object to provide a video output control device capable of improving workability in setting an RF frequency.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 includes an RF output unit that converts a video signal into a predetermined RF frequency and outputs the RF to an RF input terminal of the video output device; Outputs, to a signal input terminal, the video signal and an input switching control signal for switching an input terminal of the video output device to output a video based on the video signal input to the video signal input terminal. Video signal output means; RF frequency setting means for setting the RF frequency; and when the RF frequency is set by the RF frequency setting means, causes the video signal output means to prohibit output of the input switching control signal. Video signal output control means is provided. In the device according to claim 1 configured as described above, the video output control device is connected to a video signal input terminal and an RF input terminal provided in the video output device, respectively. The output means outputs a video signal to the video signal input terminal and an input switching control signal for switching an input terminal of the video output device so as to output a video based on the video signal input to the video signal input terminal. The RF output means converts the video signal to a predetermined RF frequency and outputs RF to the RF input terminal.

Further, the RF frequency setting means provided in the video output control device can set the RF frequency. When the RF frequency setting means sets the same RF frequency, The video output control means prohibits the video signal output means from outputting the input switching control signal, so that the video output device performs video output based on the video signal input to the video signal input terminal. Ban. Therefore, the video output device can output a video based on the RF output input to the RF input terminal, and the user can output the video to the video output device based on the RF output. It is possible to set the RF frequency while checking the video.

According to a second aspect of the present invention, as a configuration example of the video output control means, in the video output control device according to the first aspect, the video signal output control means includes: Is connected to the video signal input terminal of the video output device via a 21-pin cable, the output of the AV control signal to the video signal input terminal via the 21-pin cable is prohibited. is there. In the invention according to claim 2, the video signal output means outputs the video signal to a video signal input terminal of the video output device via a 21-pin cable.

As described above, when a video signal is output via a 21-pin cable, an AV control signal as the input switching control signal is output together with the video signal, and the video signal input at the video signal input terminal is output. Video output based on the Then, although it is desired to set the RF frequency while checking the video output based on the RF output, the user may not be able to check the video output based on the RF output. In view of this, in the second aspect, the problem is solved by prohibiting the video output control means from outputting an AV control signal to the video signal input terminal via the 21-pin cable. .

[0008] Further, as an example of the configuration of the video output control means in claim 2, the invention according to claim 3 is a video output control device according to claim 2, wherein the video output control means comprises: A video signal output terminal of another video output control device is connected to a video signal input terminal of the video output control device via a pin cable, and an AV control signal is input to the video signal input terminal via the same 21-pin cable. The AV control signal is prohibited from being output to the video signal input terminal of the video output device via a 21-pin cable connected between the video output control device and the video output device. There is. In the invention according to claim 3, the video signal input terminal of the video output control device is connected to a video signal output terminal of another video output control device via a 21-pin cable. The control signal is input.

In this case, the user tries to set the RF frequency while confirming the video output from the video output device when the video signal output from the another video output control device is RF-outputted. And Therefore, the video output control means determines that the AV control signal output from the another video output control device is output to the video signal input terminal of the video output device, as in the case of claim 2. By prohibiting, the user can check the video output based on the RF output on the video output device. According to a fourth aspect of the present invention, as an example of the AV control signal, in the video output control device according to the second or third aspect, the AV control signal is used for reproducing a recording medium. The output is sometimes made via the 21-pin cable.

In the invention according to claim 4 configured as described above, when the recording medium is reproduced by the video output control device and the another video output control device, the recording medium is reproduced via the 21-pin cable. The above AV control signal is output. For this reason, when setting the RF frequency, even when the user performs the work while checking the video output based on the video signal obtained by reproducing the recording medium, the AV control signal does Prevent output to the video output device via a pin cable. Note that the recording medium here may be a magnetic recording medium such as a video tape or an optical recording medium such as an LD or DVD, and does not limit the recording form of the video signal. .

As an example of a specific configuration for setting the RF frequency as described above, the invention according to claim 5 is based on the video output control device according to any one of claims 1 to 4. The video output control device includes: an RF frequency changing unit configured to output a predetermined change display screen to the video output device based on the RF output, receive a selection operation, and perform a process of changing the RF frequency; RF frequency change confirmation means for receiving a confirmation operation and confirming the change of the RF frequency while outputting a predetermined confirmation display screen to the video output device based on the signal, and changing the RF frequency by the RF frequency change confirmation means. Is established, the RF frequency changed by the RF frequency changing means is set as the RF frequency. In the invention according to claim 5 configured as described above, the RF channel changing means outputs a predetermined change display screen to the video output device based on an RF output of a predetermined RF channel frequency. Then, since the user performs the operation of selecting the RF channel based on the output change display screen, the RF frequency changing unit accepts the selection operation and performs a process of changing the RF frequency.

The RF frequency change confirmation unit outputs a predetermined confirmation display screen to the video output device based on the RF output. Then, the user performs a confirmation operation of the changed RF channel based on the output confirmation display screen. When the user confirms the change by the RF frequency change confirming means, the RF channel changed by the RF frequency changing means is set as the RF channel frequency. Then, the RF output means converts the video signal to the set RF frequency and outputs the RF signal.

[0013] By performing the operation of confirming the RF channel, the user can easily store the RF channel. Therefore, the video output device can output a video based on the RF output from the video output control device. In other words, if the user selects the RF channel by mistake, in order to confirm the selected RF channel, the receiving channel of the video output device is selected in order, so that each receiving channel is selected. You must look at the corresponding output video content one after another. However, such a confirmation operation is troublesome, and particularly when the number of reception channels is large, the operation is troublesome. Therefore, the above-described confirmation of the RF channel is useful.

As a configuration example of the RF frequency change means and the RF frequency change confirmation means, the invention according to claim 6 is the video output control apparatus according to claim 5, wherein the RF frequency change means and the RF frequency change The confirmation means is configured to output an OSD display screen of an RF channel corresponding to the RF frequency to the video output device based on the RF output. In the invention according to claim 6 configured as described above, the RF frequency changing means uses the OSD display screen of the RF channel corresponding to the RF frequency as a changed display screen based on the RF output to the video output device. When the output is performed, the user performs an operation of selecting an RF frequency based on the RF channel displayed on the OSD. Then, the RF frequency changing means changes the RF frequency to the one selected by the user.

[0015] The RF frequency change confirmation unit outputs an OSD display screen of an RF channel corresponding to the selected RF frequency as a confirmation display screen to the video output device based on the RF output. Then, the user performs a confirmation operation based on the OSD-displayed RF channel. Therefore, the RF frequency change means and the RF frequency change confirmation means display the change display screen and the confirmation display screen by using the monitor screen of the video output device to which the video based on the RF output is output. Therefore, it is not necessary to provide a new configuration only for displaying the change display screen and the confirmation display screen, which is useful for simplifying the configuration.

[0016]

[Effect of the invention]

 As described above, the present invention can provide a video output control device capable of improving workability when setting an RF frequency. According to the invention of claim 2, when the video output control device and the video signal input terminal of the video output device are connected by a 21-pin cable, the video based on the RF output is output to the video output device. The RF frequency setting operation can be performed while doing so. Furthermore, according to the invention of claim 3, even if the AV control signal is output from another video output control device connected to the video signal input terminal of the video output control device via the 21-pin cable. By prohibiting the output of the video output device to the video signal input terminal, it is possible to set the RF frequency while outputting the video based on the RF output to the video output device.

Further, according to the invention of claim 4, it is possible to set the RF frequency while checking the video output based on the RF output of the video signal obtained by reproducing the recording medium. Furthermore, according to the invention of claim 5, the RF frequency can be set while confirming the corresponding RF channel. Furthermore, according to the invention of claim 6, it is possible to simplify the configuration for displaying when the user changes and confirms the RF frequency.

[0018]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a situation in which a television set is connected to a video deck according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a signal processing path between the video deck and the television set. This is shown in the figure. It should be noted that, in the figure, the processing path of the audio signal is omitted and only the processing path of the video signal is shown.

As shown in FIG. 1, an RF cable A and a 21-pin cable B are connected between the video deck 10 and a television set 20 as a video output device according to the present invention. The video tape on which the video signal is recorded and reproduced by the video deck 10 constitutes a recording medium according to the present invention. As shown in FIG. 2, a television signal received by the tuner 11 based on the reception frequency specified by the microcomputer 12 or an RF output output from the RF converter 13 is transmitted via the RF cable A. It can be output to the set 20 side, and through the 21-pin cable B, a television signal processed by the video IC 14 in accordance with a control instruction from the microcomputer 12 or a video reproduced by the tape mechanism 15. The reproduction signal can be output to the television set 20 side.

As shown in FIG. 1, the video deck 10 is provided with an antenna 16 capable of receiving a television signal, and the television signal received by the antenna 16 is transmitted to a distributor 17. Supplied. The distributor 17 distributes the supplied television signal to the output switching circuit 18 and the tuner 11, and the television signal distributed to the tuner 11 is input to the video IC 14. Then, the video IC 14 performs predetermined signal processing on the input television signal and supplies it to the tape mechanism 15 to record it on a video tape.

Here, the television signal distributed to the output switching circuit 18 is supplied to an RF output terminal 18a. The television signal supplied to the RF output terminal 18a is input to the RF input terminal 21a of the television set 20 via the RF cable A, and when a predetermined RF channel is set by the tuner 21, This RF output is received in the same way as when a television signal is received by an antenna (not shown). For this reason, the received RF output is input to the chroma IC 23 via the input switching circuit 22, and after being subjected to predetermined signal processing, is output as an image from the CRT monitor 24. On the other hand, when a video tape is played back on the video deck 10 and a video playback signal played back by the tape mechanism 15 is input to the video IC 14, the video playback signal is subjected to predetermined signal processing and then processed. It is supplied to the AV output circuit 19 and the RF converter 13. Accordingly, the video reproduction signal supplied to the AV output circuit 19 is input to the AV input circuit 25 as the video signal input terminal according to the present invention provided in the television set 20 via the 21-pin cable B. It is supplied to the input switching circuit 22. The video reproduction signal supplied to the RF converter 13 is converted to a predetermined RF frequency and then supplied to the RF output terminal 18a via the output switching circuit 18. 20 is input to the RF input terminal 21a.

At this time, if the AV input side is selected by the input switching circuit 22 of the television set 20, the AV output input from the video deck 10 via the 21-pin cable B is input to the chroma IC 23. Therefore, video output is made to the CRT monitor 24 based on the AV output. When the RF channel is selected by the tuner 21 of the television set 20 and the RF input side is selected by the input switching circuit 22, the RF signal received by the tuner 21 is transmitted as in the case described above. The output is input to the chroma IC 23 via the input switching circuit 22, and an image based on the RF output is output to the CRT monitor 24. Therefore, the video IC 14 which outputs the video reproduction signal from the AV output circuit 19 constitutes the video signal output means according to the present invention, and converts the video reproduction signal to a predetermined RF frequency and outputs the RF signal to the RF output terminal 18a. Reference numeral 13 constitutes an RF output unit according to the present invention.

Incidentally, the RF frequency set by the RF converter 13 is determined according to a control signal output from the microcomputer 12 to the video IC 14. In this sense, the microcomputer 12 constitutes the RF frequency setting means according to the present invention. Further, the microcomputer 12 is provided with a remote control receiving circuit for receiving, amplifying and demodulating an infrared signal transmitted from the remote control transmitter 12a. When an operation of setting an RF channel is executed by the remote control transmitter 12a, The RF channel is determined based on this setting operation. Therefore, the user can set the RF channel used in the RF converter 13 by executing the setting operation of the RF channel with the remote control transmitter 12a.

FIG. 3 is a flowchart showing an operation procedure in the microcomputer when setting the RF channel. When the microcomputer 12 detects that the user has pressed down the mode setting button for RF channel setting with the remote control transmitter 12a (step S100), the microcomputer 12 shifts to the RF channel setting mode based on this setting operation. Then, an OSD display signal relating to the mode display of the RF channel setting is created and output to the video IC 14 (step S110).

At this time, the tape mechanism 15 executes the reproduction of the video tape, and the OSD superimposition circuit 14 a provided in the video IC 14 superimposes the OSD display signal on the obtained video reproduction signal. Therefore, a video reproduction signal on which the OSD display signal is superimposed is output from the video IC 14 and supplied to the AV output circuit 19 and the RF converter 13. Then, the video reproduction signal supplied to the RF converter 13 is converted into a predetermined RF frequency, and is then RF-output to the television set 20 via the output switching circuit 18. On the other hand, the video reproduction signal output from the AV output circuit 19 is supplied to the AV input circuit 25 of the television set 20 via the 21-pin cable B.

As shown in FIG. 4, the 21-pin cable B is provided with 21 input / output signal paths for inputting / outputting audio signals, inputting / outputting video signals, and the like. The units are connected to the AV output circuit 19 and the AV input circuit 25, respectively. The eighth signal path of the 21-pin cable B is provided to output the AV control signal output from the video IC 14 from the AV output circuit 19 to the AV input circuit 25. By switching the input switching circuit 22 of the television set 20 to the AV input side, an image based on the AV output is output to the CRT monitor 24.

However, the microcomputer 12 according to the present embodiment prohibits the AV output circuit 19 from outputting an AV control signal in the RF channel setting mode, as described above. That is, when a high level signal is input from the video IC 14 to the 8th pin of the AV output circuit 19 at the time of setting the RF channel, the microcomputer 12 outputs a control signal to the AV output circuit 19 so that the high level signal is output. To a low-level signal to turn off the output of the AV control signal. In this sense, the microcomputer 12 constitutes the video output control means according to the present invention. Then, since the AV control signal is not output from the eighth signal path (Pin 8), a video signal based on the video reproduction signal is output via the 21-pin cable B, The input switching circuit 22 does not automatically switch to the AV input side.

Therefore, when the RF channel is set, when the tuner 21 receives the RF output from the video deck 10, the video signal based on the received RF output can be restored by the chroma IC 23 and output to the CRT monitor 24. It becomes possible. Therefore, on the monitor screen of the television set 20, an OSD display relating to the RF channel setting mode as shown in FIG. 5 and a video based on the video reproduction signal are output while being superimposed on the basis of the RF output. Here, when the microcomputer 12 detects that the user has selected a desired RF channel with the remote control transmitter 12a (step S120), the microcomputer 12 assigns a number (for example, 2 channels) corresponding to the selected RF channel. It acquires (steps S130 and S140), creates an OSD display signal for displaying the corresponding channel number, and outputs it to the video IC 14 (step S150). In this sense, the microcomputer 12 constitutes the RF frequency changing means according to the present invention.

When the OSD superimposing circuit 14 a provided in the video IC 14 superimposes the OSD display signal on the video reproduction signal obtained from the tape mechanism 15 and supplies the superimposed OSD display signal to the RF converter 13, the RF converter 13 outputs a predetermined RF frequency. Is output from the video deck 10 via the output switching circuit 18. For this reason, the television set 20 receives the RF output and supplies it to the chroma IC 23 in the same manner as described above, so that the CRT monitor 24 indicates the selected RF channel as shown in FIG. The video based on the OSD display and the video playback signal is output while being superimposed.

As shown in the figure, the OSD display screen for confirming the RF channel selected by the user also includes an OSD display for prompting confirmation along with the RF channel. When the confirmed RF channel is confirmed, the operation of setting the RF channel is completed by pressing down the confirmation button on the remote control transmitter 12a. At this time, when the microcomputer 12 detects the pressing operation of the confirmation button (Step S160), the microcomputer 12 outputs the selected and confirmed RF channel to the RF converter 13 via the video IC 14, and the RF frequency corresponds to the same RF channel. And return to the normal control mode from the RF channel setting mode. In this sense, the microcomputer 12 constitutes an RF frequency change confirmation unit according to the present invention.

Therefore, when setting the RF channel, the input control circuit 22 of the television set 20 is automatically switched from the RF input side to the AV input side by outputting the AV control signal from the AV output circuit 19, It is possible to prevent the user from seeing the image based on the RF output from the VCR 10 on the CRT monitor 24. For this reason, even if the 21-pin cable B connected between the VCR 10 and the television set 20 is not removed, the switching control of the input switching circuit 22 by the AV control signal prevents the setting operation of the RF channel. The fear disappears. Further, the user can output the RF output from the video deck 10 to the television set 20 by remembering the RF channel selected and confirmed in the RF channel setting mode. In other words, if the user selects the RF channel by mistake, in order to confirm the selected RF channel, the user selects the receiving channels of the television set 20 in order, and selects each receiving channel. Must be sequentially viewed for the video content that is output in response to. However, such confirmation work is troublesome, and particularly when the number of reception channels is large, the work is troublesome. Therefore, the confirmation steps S150 and S160 shown in FIG. 3 avoid such a situation. Will be useful for.

In the above description, when the RF channel is set, the AV control signal output from the video IC 14 is prevented from being output to the television set 20, but as shown in FIG. The same applies to the case where the AV output terminal of another video deck 30 is connected to the AV input terminal of the deck 10 via the 21-pin cable C. In this sense, the video deck 30 constitutes another video output control device according to the present invention. That is, when a video tape is played back on the video deck 30 and an AV control signal output from a video IC mounted on the video deck 30 is supplied to the AV input terminal of the video deck 10 via the 21-pin cable C, Conventionally, the video signal was output to the television set 20 via the AV output circuit 19 of the video deck 10. However, in the case of the present embodiment, the AV control output from the video deck 30 was output. As with the AV control signal output from the video IC of the video deck 10, the output to the television set 20 can be prohibited when the RF channel is set, even if the signal is a signal.

The device connected to the AV input terminal of the video deck 10 to supply a predetermined video signal is not limited to the video deck described above. The same applies to devices such as playback devices. As described above, even if the 21-pin cable B is not removed, the microcomputer 12 prohibits the AV control signal from being output to the television set 20 via the 21-pin cable B during the RF channel setting mode. As a result, the video output based on the RF output can be confirmed, so that the workability when setting the RF frequency can be improved.

[Brief description of the drawings]

FIG. 1 is an exemplary perspective view showing a situation when a television set is connected to a video deck according to an embodiment;

FIG. 2 is a block diagram illustrating a signal processing path between a video deck and a television set.

FIG. 3 is a flowchart showing an operation procedure in a microcomputer when setting an RF channel.

FIG. 4 is a schematic diagram showing a schematic configuration of a signal path provided in a 21-pin cable.

FIG. 5 is a monitor screen showing a mode display of RF channel setting.

FIG. 6 is a monitor screen showing a display for confirming a selected RF channel.

FIG. 7 is a perspective view showing a situation when an AV input terminal of a video deck is connected to an AV output terminal of another video deck with a 21-pin cable.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Video deck 11 ... Tuner 12 ... Microcomputer 12a ... Remote control transmitter 13 ... RF converter 14 ... Video IC 14a ... OSD superposition circuit 15 ... Tape mechanism 16 ... Antenna 17 ... Distributor 18 ... Output switching circuit 18a ... RF output terminal 19 ... AV output circuit 20 ... Television set 21 ... Tuner 21a ... RF input terminal 22 ... Input switching circuit 23 ... Chroma IC 24 ... CRT monitor 25 ... AV input circuit 30 ... Video deck A ... RF cable B, C ... 21 pin cable

Claims (6)

[Utility model registration claims] An RF output means for converting a video signal into a predetermined RF frequency and outputting an RF signal to an RF input terminal of a video output device; and a video signal input terminal of the video output device; Video signal output means for outputting an input switching control signal for switching an input terminal of the video output device so as to output video based on the video signal input to the video signal input terminal; and RF for setting the RF frequency Frequency setting means, and video signal output control means for prohibiting the video signal output means from outputting the input switching control signal when the RF frequency is set by the RF frequency setting means. Video output control device. 2. The video output control device according to claim 1, wherein said video signal output control means is connected to a video signal input terminal of said video output device via a 21-pin cable. A video output control device for prohibiting output of an AV control signal to the video signal input terminal via the 21-pin cable when the video signal is output. 3. The video output control device according to claim 2, wherein said video output control means transmits a video of another video output control device to a video signal input terminal of the video output control device via a 21-pin cable. When a signal output terminal is connected and an AV control signal is input to the video signal input terminal via the 21-pin cable, a 21-pin cable connected between the video output control device and the video output device is connected. A video output control device for prohibiting the AV control signal from being output to a video signal input terminal of the video output device via the video output device. 4. The video output control device according to claim 2, wherein the AV control signal is output via the 21-pin cable when reproducing a recording medium. Video output control device. 5. The video output control device according to claim 1, wherein the video output control device outputs a predetermined change display screen to the video output device based on the RF output. RF that accepts a selection operation while changing the RF frequency
Frequency change means, and RF frequency change confirmation means for receiving a confirmation operation and confirming the change of the RF frequency while outputting a predetermined confirmation display screen to the video output device based on the RF signal; An image output control device, wherein when the change is confirmed by the change confirming means, the RF frequency changed by the RF frequency changing means is set as the RF frequency. 6. The video output control device according to claim 5, wherein the RF frequency changing unit and the RF frequency change confirming unit include:
RF corresponding to the RF frequency based on the RF output
A video output control device for outputting an OSD display screen of a channel to the video output device.