JPH01109886A - Catv converter - Google Patents

Abstract

PURPOSE:To enhance a secrecy for setting a channel capable of being viewed only by a specific user by providing a means for detecting a power failure and changing the operation state of a CATV converter according to a power failure detecting signal and the state of an operation control switch. CONSTITUTION:Initially, the specific user uses a key to bring a switch 12 ro a setting and inputting state and registers the channel which is not viewed by a person except him in a memory 10 from a keyboard 7 or the like. According to the power failure of a power source, when the data of the registered channel of the memory 10 is lost, a non-back up state is detected at the time of resetting the power source and resetting and starting a microcomputer in a control unit 5 and the control unit 5 shifts the operation state according to the state of the switch 12. Namely, at the time of closing the switch 12, namely at the time of setting the channel, the registered channel is defined to be absent to execute an operation capable of receiving all the channels. Then, at the time of opening the switch 12, namely, at the time of setting the channel, all receiving channels are defined to be registered and operated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a CATV converter device capable of switching and controlling operation modes.

Conventional technology Traditionally, in 0ATV converter devices, emphasis has been placed on a function that allows only a specific user to set a plurality of arbitrarily designated channels among all receivable channels to a state in which selection is disabled using a key provided in the switch section. It's here.

The conventional 0A as described above with reference to one drawing below.
The TV converter device will be explained.

FIG. 2 is a block diagram showing the configuration of a conventional CATV converter device. In FIG. 2, 1 is a tuner to which an RF television signal is input, 2 is a demodulator for demodulating the intermediate frequency signal from the tuner 1, and 3 is a video signal output from the demodulator 2.

4 is a modulator for converting an audio signal into a high frequency television signal of a specific channel; 4 is a tuning device for converting a tuning signal from a control unit 6 including a microcomputer into a tuner control signal; 6 is a CATV For example, LE for displaying the operating status of the converter device.
A display device using D, 7 a keyboard for inputting control information from the outside, 8 and 9 a remote control receiver and a remote control transmitter to enable remote control, 1o a channel selection Memory for storing operating status such as channels,
11 is a backup power supply for retaining the contents of the memory 10, and 12 is a switch for controlling the operating state of the control unit 6. The switch section 12 is provided with a key so that only the owner of the key can operate it. 13 is a television receiver.

The operation of the 0ATV converter device configured as described above will be explained below.

First, with the key in the key, the owner of the key turns on the switch 12 and uses the keyboard 7 or the remote control transmitter 9 to send a channel that is not to be received or that is not desired to be viewed by anyone other than the key owner to the control unit 5. register. The registered channels are stored in the memory 1o by the microcomputer in the control fist unit 5. The number of channels that can be registered varies from a few channels to all reception channels depending on the capacity of the memo I710. Next, by turning off the switch 12, the operating state of the microcomputer in the control unit S can be changed so that the channels registered in the memory 10 are not selected. If the key is removed in this state, no one other than the key owner will be able to change the channels that can be selected. Additionally, channels can only be registered and deleted when the key is inserted. The operations described above make it possible to set channels that can only be viewed by specific users.

Problems to be Solved by the Invention However, with the above configuration, if there is a power outage or the power is turned off intentionally, the registered channels in the memory will disappear, and channels other than those set by a specific user will disappear. It becomes possible to easily watch channels. Furthermore, even if a backup power source is provided and the device has a memory backup function, it is possible to erase the registered channel by momentarily cutting off the backup power source by some means, which may cause problems in terms of confidentiality. there were.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a CATV converter device having a simple configuration and a specific channel setting function with high confidentiality.

Means for Solving the Problems To achieve this object, the CATV converter device of the present invention includes means for detecting a power outage, and a power outage detection signal from the detection means that detects a power outage and an operation control switch. Depending on the state, if the control switch is in the state where channel setting input is possible, the switching means is set to the state where all channels can be selected.
If the control switch is in a state in which channel setting input is disabled, the switching means is in a state in which selection of all channels is disabled.

Operation With the above configuration, a power outage detection signal is generated when a power outage or a non-backup state occurs, and if the control switch is in a state in which channel setting input is disabled, all registered channels are in a state in which reception is not possible, and the control switch operates after power is reenergized. If it is in a state where channel setting input is possible, the gold receiving channel will operate in a state where it can be selected and received after power is re-energized. In other words, if a power outage occurs in a state in which input to the control switch is disabled and it can be determined that the specific user's intention to set a channel has been determined, reception of all channels will be disabled after the power is turned on again. Become. As a result, specific chat operations with high confidentiality are possible.

Embodiment One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a CATV converter device in an embodiment of the present invention. Note that the same reference numerals are used to designate the same configurations as those of the prior art, and detailed explanations thereof will be omitted. In FIG. 1, 1 is a tuner, 2 is a demodulator, 3 is a modulator, 4 is a channel selection device, 6 is a control unit,
6 is a display device, 7 is a keyboard, and 8 is a remote control receiver.

9 is a remote control transmitter, 1o is a memory, 11 is a backup power source, 12 is a switch, 13 is a television receiver, and at least 1 is the same as the configuration shown in FIG. 6a is a power failure detection device provided within the control unit. In this embodiment, the microcomputer in the control unit 6 writes special data indicating the energization state to a specific address in the memory 10, and the special data in the memory 10 is retained every time the microcomputer starts to reset. By checking this, the occurrence of a power outage and a non-backup state can be detected regardless of the presence or absence of the backup power supply 11.

The operation of the 0ATV converter device configured as described above will be described below.

The RF television signal inputted to the tuner 1 is outputted as an intermediate frequency signal, demodulated into a video signal and an audio signal by a demodulator 2, and modulated into an RF television non-signal by a modulator 3 again, and then input to a television receiver 13. The tuning device 4 converts the tuning information from the control unit 6 into a tuner control voltage.

First, a specific user who has a key to control the switch 12 uses the key to enable setting input of the switch 12, and uses the keyboard 7 or remote control transmitter 9 to allow someone other than himself to view the settings. Register channels that you do not want to allow. Channel data is control sound unit 6
The data is stored in the memory 10 by the internal microcomputer. Next, the specific user can no longer control the switch 12 by turning off the switch 12 and removing the key.

The control unit 6 changes its operating state when the switch 12 is turned off, and the channel registered in the memory 10 is not selected.

Through the above operations, it becomes possible to set a channel that can only be viewed by specific users. Memory contents can only be changed when the switch is on.

Next, if the registered channel data in memory 10 disappears due to a power outage, an intentional power outage by someone else, or a momentary interruption of the backup power supply, the special data stored for power outage detection will also disappear and the power will be turned off. When the microcomputer in the control unit 6 is reset and started, a non-backup state is detected, and the control unit 5 changes its operating state depending on the state of the switch 12. That is, when the switch 12 is turned on, that is, when the channel setting is enabled, it assumes that there are no registered channels and performs an operation in which all channels can be received. Then, when the switch 12 is turned off, that is, when the channel setting is enabled, the operation is performed assuming that all reception channels are registered.

Therefore, in this case, no channel can be selected until the switch 12 is turned on using the key.

In this embodiment, if the switch is turned off for the convenience of a specific user who holds the key, a function is provided to display on the display device 6 that all receiving channels are automatically registered, and a switch is provided. The microcomputer in Control Unit 5 has a function that automatically cancels the registration of all channels when a channel is entered.

As described above, this embodiment has a simple configuration.

If a power outage occurs after a specific user completes designation of reception channels, all channels will become unreceivable after power is restored, increasing the confidentiality of registered channels.

In this embodiment, the power failure detection device uses a microcomputer and a memory to perform software processing, but it is also possible to configure it using hardware.

Effects of the Invention As described above, according to the present invention, a means for detecting a power outage is provided, and by changing the operating state of the 0ATV converter device according to the power outage detection signal and the state of the switch, the confidentiality of channel settings that can be viewed only by specific users can be maintained. It has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a 0ATV converter device according to an embodiment of the present invention, and FIG.
FIG. 2 is a block diagram showing the configuration of a converter device. 1...Tuner, 2...Demodulator, 3.
...Modulator. 4...Tuition selection device, 5...Control unit, 5a...Power failure detection device, 6...
...Display device, 7...Keyboard, 8...
...Remote control receiver, 9...Remote control transmitter, 10...Memory, 11...No(
Power supply for pull-up, 12... Switch, 13.
...television receiver. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure wE 2 Figure

Claims (1)

[Claims] a switching means capable of setting any designated channel among the receivable channels to a state in which selection is disabled; a switch capable of enabling or disabling setting input by the switching means; and a power outage detector detecting a power outage. means is provided, and when the control switch is in a state in which channel setting input is enabled by a power outage detection signal that detects a power outage from the power outage detection means, the switching means is set in a state in which all channels can be selected; A CATV converter device characterized in that, if the switching means is in an impossible state, all channels are disabled.