JP2000307449A - Broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To receive individual control information even when a user interrupts a main power switch by blocking interruption of a main power supply when a current time is within a period of receiving the individual control information and releasing the interruption blocking of the main power supply when it is detected that the current time is not within the period of receiving the individual control information. SOLUTION: A main power switch 1007b is provided in parallel with a conventional main power switch 1007a and a detection circuit 1008. Thus, even when the main power switch 1007a is turned off, the main power switch 1007b is closed to supply power to a standby power supply circuit 1009. An auxiliary control circuit 1202 controls the main power switch 1007b. When the main power switch 1007a is open and the time if within a reception period of the individual control information, the auxiliary control circuit 1202 closes the main power switch 1007b. Thus, even when a user opens the main power switch 1007a, the receiver can display the individual control information and a message. After the reception of the information is finished or the reception period passes over, the main power switch 1007b is turned off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for a pay broadcasting system including a broadcasting station center system and a plurality of subscriber receivers, such as a pay satellite broadcasting system and a CATV (Cable Television) broadcasting system.

[0002]

2. Description of the Related Art FIG. 10 shows a general configuration of a broadcasting system using satellites. The broadcast signal transmitted from the terrestrial broadcast station 1001 is transmitted to the receiving device 100 of each home via a satellite.
2, the signal is demodulated, and the data is decoded. The signal is output to a television receiver (TV) 1003, and the user can receive a broadcasting service. The receiving device 1002 may be built in the TV 1003 in some cases.

Normally, there are a plurality of broadcasting stations 1001, and individual control information is transmitted from the broadcasting station 1001 to the receiving device 1002 according to the contents of a user's contract. In general, this information is called EMM (Entitlement management message) data, and E information to which an ID number unique to the receiving device is added.
The MM data is transmitted from the center 1001 to each receiving device 1002
Is multiplexed with a broadcast signal and transmitted. Receiving apparatus 1002 receives its own EMM data from its unique ID, contract information is stored in the receiving apparatus, and the user can receive a pay broadcast service based on the contract information. Generally, in order to renew the contract in accordance with the contract period of the pay broadcasting service, it is necessary to periodically send EMM data.

[0004] In order to transmit EMM data from a plurality of broadcasting stations, the timing of receiving EMM from the broadcasting station 1001 is set in the receiving apparatus 1002 in advance. As a method of setting the reception time, there is a method of setting including the next update time when the contract information is transmitted, a method of separately setting the EMM data, and the like.

[0005] In addition, pay broadcasting, for example, PPV (Pay)
(Per View) In the case of operating according to the viewing method and performing charging according to the viewed program, the public line network 1004
In some cases, the information of a program watched at each home from each receiving apparatus 1002 may be transmitted to the broadcasting station 1001 by using the broadcast receiver 1002.

[0006] In the above-mentioned pay broadcasting system, pay broadcasting services are provided by various methods such as channel units, program units, and time units. In such a case, when the subscriber subscribes to the pay broadcast, individual control information including the contract content is transmitted from the center to the subscriber receiving device according to the contract content and stored. The receiving device can control viewing according to the contract information set by the individual control information, and can perform a paid service according to the subscriber's contract. This contract is generally fixed-term, and individual control information for updating the contract is periodically transmitted from the center to the receiving device.

[0007] Usually, in broadcast, individual control information is multiplexed on a broadcast signal and transmitted. However, from the viewpoint of many receivers, it is not known when the individual control information is sent, so that the receiving apparatus needs to receive the broadcast signal even when the subscriber is turned off. Therefore, the receiving apparatus has to turn off the power, but it is necessary to supply power to almost all parts in the receiver for receiving the individual control information, and there is a problem that the power is wasted.

In Japanese Patent Application No. 10-318153 filed earlier, the time for receiving individual control information is set in advance from the center to the receiver in order to solve this problem, and at that time the subscriber turns off the power. If it is, power sufficient to receive the individual control information is supplied to receive this information, and at other times, the necessary power is supplied to the minimum necessary power saving.

However, in this case, in a receiving apparatus having a main power switch that cuts off all power supply in the receiving apparatus, if the user turns off the main power switch, the receiver becomes completely inoperable, and individual receivers from the center become inoperable. There is a problem that control information cannot be received.

[0010]

As described above, in a conventional receiving apparatus having a main power switch for turning off all power in the apparatus of the broadcasting system, if the user turns off the main power, the receiver is turned off. Becomes inoperable at all and cannot receive individual control information from the center. The present invention solves the above problems, and does not hinder the reception of the individual control information from the center even if the user turns off the main power switch in the receiving device having the main power switch,
An object of the present invention is to provide a receiving device capable of saving power. Therefore, it is an object of the present invention to provide a receiving apparatus having a main power switch, even if the user turns off the main power switch, the information can be received from the center at the time of receiving the individual control information, or the main power switch is to be turned off at this time. It is an object of the present invention to provide a receiving device that alerts a user not to turn off the power, and that can minimize power consumption at times other than when individual information is received.

[0011]

According to a basic feature of the present invention, in order to achieve the above object, according to a broadcast system used in a broadcast system for transmitting control information individually from a center to each broadcast receiving apparatus. Means for receiving, in advance, an individual control information reception period scheduled to receive individual control information transmitted from the center; a means for storing the individual control information reception period received by the unit; , A comparing means for comparing the current time counted by the clock with the individual control information receiving period, a first power supply circuit for supplying at least power to the comparing means and the clock, A first main power switch capable of controlling on / off of power supply by the power supply circuit; and supplying power to a portion other than a portion supplied with power by the first power supply circuit. A second power supply circuit Kyusuru, the second
A power supply circuit that controls on and off of power supply, a sub-power switch connected in series to the first main power switch, a detection unit that detects that the first main power switch is off, Main power-off preventing means for preventing the main power from being turned off when at least the detecting means detects that the first main power switch is turned off when the time is within the individual information receiving period. Provided is a broadcast receiving device.

Therefore, even if the user attempts to turn off the first main power switch during the individual control information receiving period, this switch can be kept on, so that the reception of the individual control information can be continued.

[0013] In the above configuration, when the main power supply is turned off by the main power-off prevention means, the comparison means detects that the current time is out of the individual control information reception period. In this case, the main power-off prevention means cancels the main power-off prevention by the main power-off prevention means.

Therefore, when the current time is out of the individual control information receiving period, not only the sub power switch but also the main power switch is turned off, and power is not supplied by the first power circuit, so that further power saving can be achieved. .

Further, in the above configuration, the main power-off preventing means is a second main power switch which is turned on / off by detecting that the current time is within the individual control information receiving period by the comparing means. The second main power switch provides a broadcast receiving device connected in parallel with the first main power switch.

Therefore, even if the first main power switch is turned off, the second main power switch is turned on, and the reception of the individual control information can be continued.

In the above configuration, when the comparing means detects that the current time is within the individual control information receiving period, the second main power switch is turned on;
When the first main power switch is turned off by the user during the individual control information reception period, detecting the first main power switch and outputting a video signal for displaying a warning message for turning off the main power. The present invention provides a broadcast receiving apparatus characterized by the following.

Therefore, since the message is displayed, there is no suspicion that the power of the receiving apparatus is turned on even when the user turns off the main power switch.

Further, in the above configuration, there is further provided a means for detecting that the current time is within the individual control information receiving period by the comparing means, and informing a user that the individual control information is being received. There is provided a broadcast receiving apparatus characterized by the above.

Therefore, the user can recognize that the individual control information is being received, and can eliminate anxiety that the receiving device is different from when watching a normal TV broadcast.

[0021] In the above-mentioned configuration, the broadcast further comprises a message output means for notifying that the individual information is being received and outputting a message indicating that the main power cannot be turned off. Provide a receiving device.

Therefore, the message display means
Since the information can be specifically communicated to the user, anxiety can be further reduced.

According to yet another basic feature of the invention,
For each broadcast receiving device, in a broadcast receiving device used in a broadcast system for sending control information individually from a center,
Receiving period storing means for receiving and storing the individual control information receiving period transmitted in advance from the center for each receiving device, a clock for counting the current time, and storing the current time counted by the clock and the receiving period storing means Comparing means for comparing the received individual control information receiving period, a first power supply circuit for supplying at least power to the comparing means and the timepiece, a main power switch capable of controlling on / off of the first power supply, A second power supply circuit for supplying power to a portion other than the portion supplied with power by the first power supply circuit;
Broadcast reception comprising: a sub power switch capable of controlling on / off of the second power supply; and means for controlling the main power switch and the sub power switch to be on when receiving the individual control information. Provide equipment.

Therefore, the user can recognize that the individual control information is being received, and can eliminate anxiety that the receiving device is different from when watching a normal TV broadcast.

[0025] In the above-mentioned configuration, when the individual control information is received, there is further provided a means for notifying the user that the individual control information is being received. Provided is a broadcast receiving device.

According to yet another basic feature of the present invention,
For each broadcast receiving device, in a broadcast receiving device used in a broadcast system for sending control information individually from a center,
A receiving period storing means for receiving and storing an individual control information receiving period transmitted in advance from the center for each receiving device, a clock for counting a current time, a current time counted by the clock, the individual control information receiving period, , A first power supply circuit for supplying at least power to the comparison means and the timepiece, a main power switch capable of controlling on / off of power supply by the first power supply circuit, and a first power supply. A second power supply circuit for supplying power to a portion other than a portion supplied with power by the circuit, and a sub-power switch connected in series to the main power switch for controlling on / off of the power supply by the second power supply circuit When the comparison unit detects that the current time is within the individual information reception period, a display is displayed to warn the user not to turn off the main power. To provide a broadcast receiving apparatus comprising a stage.

Therefore, when the user attempts to turn off the main power switch, and during the individual control information reception period, the user is warned not to turn off the main power, so that the reception of the individual control information is interrupted. Less.

According to yet another basic feature of the invention,
For each broadcast receiving device, in a broadcast receiving device used in a broadcast system for sending control information individually from a center,
A receiving period storing means for receiving and storing an individual control information receiving period transmitted in advance from the center for each receiving device, a clock for counting a current time, and storing the current time counted by the clock and the individual control information receiving period. Comparing means for comparing, a first power supply circuit for supplying power to at least the comparing means and the timepiece, a main power switch capable of controlling on / off of supply of power by the first power supply circuit, and the first power supply A second power supply circuit for supplying power to a portion other than a portion supplied with power by the circuit, and a sub-power switch connected in series to the main power switch for controlling on / off of the power supply by the second power supply circuit When the current time is detected to be within the individual information receiving period by the comparing means, the first main power switch is prevented from being turned off. Providing receiving apparatus.

Therefore, during the individual information reception period, the main power switch is not turned off, and the individual information reception can be continued.

[0030] Further, in the above-mentioned configuration, when the individual control information is being received, there is further provided means for informing the user that the individual control information is being received. Provide a receiving device.

[0031]

FIG. 1 is a block diagram of a receiver for explaining an embodiment of the present invention. Receiving device 10
Reference numeral 06 denotes a terminal 1101 to which a broadcast signal obtained by appropriately converting the frequency of a signal received by a receiving antenna is input, a terminal 1102 to which a TV receiver is connected, a terminal 1103 to be connected to a telephone line, and a commercial AC power supply. Terminal 110 to which is connected
4 are provided.

The receiving apparatus 1006 is configured by a main power switch 100 connected in parallel to a terminal 1104.
7a, 1007b and a detection circuit 1008 connected to the other end of a main power switch 1007a that can be turned on and off by a user.
And a standby power supply circuit 10 connected in series to this detection circuit.
09 and the sub power switch 1 connected to the other end of the main power switch 1007b and the output terminal of the detection circuit 1008.
010 and a power supply circuit 1 connected to the other end of the switch.
011, a dotted line portion 1012 receiving power supply from the power supply circuit 1011, and a dotted line portion 1013 receiving power supply from the standby power supply circuit 1009.

The detection circuit 1008 detects the state of the main power switch 1007a operated by the user, that is, the presence or absence of the supply of AC power, and outputs it to the auxiliary control circuit 1202 described later. One of the features of this embodiment of the present invention is that the main power switch 1007b is a normal main power switch 1007a.
The main power switch 1007a can be turned on even when the main power switch 1007a is turned off to supply power to the standby power circuit 1009, and this switch is controlled by the auxiliary control circuit 1202. Is done.

The broadcast signal input to the terminal 1101 is subjected to signal selection, demodulation, and data error correction processing in a tuner circuit 1105. Generally, a QPSK modulation is used for a broadcast signal, and a Reed-Solomon error correction code, a convolutional code, or the like is used as an error correction method.

A tuner 1105 outputs a demodulated and error-corrected packet-format signal.
It is input to 106. The data in the packet format is generally data of the ISO13818-1 standard (MPEG2 system standard), and the packet data includes a plurality of broadcast signals and control data. The decoder circuit 1106 performs a broadcast signal separation process and a video / audio signal decode process. The decoded video / audio signal is multiplexed with characters, graphics, and the like for a display interface with a user, such as an operation menu and a message, in a display circuit 1107, and is output to a terminal 1102 after modulating the TV signal. A TV receiver is connected to the terminal 1102 so that the user can watch the program.

A control signal receiving circuit 1108 which receives a signal from the decoder circuit 1106 separates a control signal such as program information and time data multiplexed from the broadcast signal from the broadcast signal, and outputs the control signal to the control circuit 1109. Is processed. The program information is stored in the memory 1110 and used as control information for selecting and viewing a program. EMM receiving circuit 11 receiving a signal from decoder circuit 1106
At 11, the EMM data multiplexed on the broadcast signal is separated from the unique ID number of the receiving device, and the control circuit 11
Send to 09. In this control circuit 1109, the received EMM
The contract information is extracted from the data, and is stored as data in the nonvolatile memory 1112 for storing contract data. Note that a control table described later is stored in the nonvolatile memory 1113 via the control circuit 1109. Control circuit 11
09 is connected to a terminal 1103 via a telephone modem 1114.

A dotted line portion 1013 receiving power supply from the standby power supply circuit 1009 includes a clock 120 for managing the current time.
1, an auxiliary control circuit 1202 for controlling the sub power switch 1010, a memory 1203 for storing program information,
Key input circuit 120 input by user's program selection
4 and a terminal 1104 of the receiving apparatus 1006.
Is normally plugged into an AC outlet, the main power switch 1007a is turned on and is always operating.

The clock 1201 is a control signal receiving circuit 110
The operation is performed based on the time data multiplexed in the broadcast signal, which is separated in step 8, and the current time is managed. By this time management, it is possible to display the current time, make a reservation for program viewing, count processing for charging time for program viewing, and the like. The key input circuit 1204 performs an operation interface of the user, and outputs selection contents such as program selection of the user to the control circuit 1109 via the auxiliary control circuit 1202, and the selected contents are processed by the control circuit 1109. You.

The control circuit 1109 controls the whole of the receiving apparatus 1006. The display circuit 1107 displays a program menu to the user based on the program information in the nonvolatile memory 1113, and the user selects a program to be viewed. The selection information is input to the key input circuit 1204. The input data is compared / referenced by the control circuit 1109 with the contract data in the nonvolatile memory 1112, and it is determined whether the selected program is viewable.
105, the decoder circuit 1106, etc., to control the reception and output of the program selected by the user.

In FIG. 1, a commercial A
The C power supply is connected, and power is supplied to the receiving apparatus 1006. The switch circuit 1007a is a main power switch that can be turned on and off by a user. Usually this main power switch 10
07a is on, but this switch may be turned off after the user watches the program in an attempt to save as much power as possible. If this main power switch 10
When 07a is turned off, the standby power supply circuit 1009 does not operate, and eventually, power is not supplied to the dotted line portion 1013, and the current time cannot be recognized. Therefore, in such a case, the other main power switch 1007b is turned on,
The dotted line part 1013 is activated.

The user can also turn on and off the sub power switch 1010. When the switch 1010 is off, the supply of AC power to the power supply circuit 1011 is cut off, and no power is supplied to the dotted line portion 1012. On the other hand, when the sub power switch 1010 is on, if the main power switch 1007a is already on, the power circuit 101
1 is connected to the AC power supply, power is supplied to the dotted line section 1012, and the entire receiving apparatus 1006 enters an operating state.

The sub power switch 1010 is operated from the key input circuit 1204 to the auxiliary control circuit 12
02 is sent to the auxiliary control circuit 1202
Controls the sub power switch 1010. When the main power switch 1007a is on, the dotted line portion 1013 is always in the operating state.
When the switch 10 is on, the dotted lines 1012 and 1013, that is, the entire receiving device 1006 is in an operating state, but when the sub power switch 1010 is off, the dotted line 1012 is in an inactive state, thereby reducing power consumption when the sub power is off. be able to.

If the EMM data is being received, the auxiliary control circuit 1202 turns on the main power switch 1007b. When the user turns off the main power switch 1007a, the detection circuit 1008 detects this off state, and the auxiliary control circuit 1202 knows that the switch 1007a is off.
If the sub power switch 1010 is off, the main power switch 1007a is detected to be off, and the sub power switch 1010 is turned on to continue the operation of the power circuit 1011. Then, the entire receiving circuit 1006 keeps operating.

Therefore, when the user operates the main power switch 10
Even if 07a is turned off, EMM data and a message can be displayed. The reception of the individual control information ends or E
If the MM data reception period has passed, the main power switch 1
By turning off 007b, the operation of the power supply circuit 1011 and thus the dotted line portion 1012 can be stopped.

In this case, when the main power switch 1007b is turned off, the dotted line portion 1013 also becomes inactive, but when the power is turned on again, the dotted line portion 1013 is operated.
There is no problem because the current time is acquired from the other, and it is compared and determined whether it is the EMM data reception period.

Next, a procedure for receiving EMM data will be described. While the receiving device 1006 is receiving a specific broadcast, the receiving device 1006 receives the EMM data illustrated in the example of FIG. The EMM data includes an ID 201 for identifying the receiving device and EMM reception control information 202 indicating when the EMM data including the contract information is transmitted.
2B, the EMM reception control information 202 is added to the EMM data including the contract data 203, and the next EMM reception time corresponding to the next contract renewal time is designated. Good.

For example, a control table shown in FIG. 3 is created from EMM reception control information from a broadcasting station, and stored in the nonvolatile memory 1113. The control table is transferred from the control circuit 1109 to the auxiliary control circuit 1202 and is also stored in the memory 1203. When there are a plurality of broadcast stations, the control table is composed of a plurality of records. The record number 301 indicates the record identification, the broadcast station number 302 indicates the broadcast station identification, and the start date 303 is
Indicates the start time of receiving the EMM data, and the end date 304
Indicates the end time of receiving the EMM data, and the control time 3
05 indicates a reception control time for receiving EMM data,
The reception CH 306 indicates the reception channel for receiving the EMM data of the broadcasting station and the identification of the multiplex packet.

When the user turns off the sub power switch 1010, the current time and the start date DB 3 in the control table are set.
03, referring to the end date DE 304, if the current time is within the period, the dotted line portion 1012 is turned on, the channel or packet indicated by the reception CH 306 is selected, and the EMM data is received.

The operation of the receiving circuit of the above embodiment will be described with reference to the flowchart of FIG. In the process 401, the current time, the start date DB 303 of the control table, and the end date DE
If there is a current time between DB and DE, that is, if it is in a period for receiving the current EMM data, the main power switch 1007b is turned on (process 402), and the main power switch is turned on by the user. Switch 1007
Even if a is turned off, the power of the receiving apparatus 1006 is not turned off.

When the detection circuit 1008 detects that the main power switch 1007a has been turned off by the user in process 403, a message is displayed in process 404. The message transmission means includes a lamp, an LED, a screen display, and the like. For example, as shown in FIG. 9A, a message that the contract update data is being received and the main power cannot be turned off is connected to the terminal 1102. Is displayed on the screen of the selected TV receiver.
By displaying the message as described above, the user can specifically recognize the state of the receiving device.

The message display includes a fixed time display, a display until the user confirms the message, an infinite time display, and the like.
In the example of FIG. 4, an example of display for a certain period of time by processing 404, processing 405, and processing 406 is shown. Main power switch 1007
When “a” is on, the standby power supply circuit 1009 operates, so that at least the dotted line portion 1013 is in an energized state, the energization control of the dotted line portion 1012 is performed based on information in the control table, and EMM data can be received. . Process 40
7 determines whether or not the current time is within the EMM data reception period, and continues the state during the reception period.
8) Turn off the switch 1007b, and turn off all power supply in the receiving device. Therefore, the main power supply can be turned off outside the EMM data reception period, and power saving of the receiver can be achieved.

FIG. 5 shows a flowchart of another embodiment of the present invention, which also displays the time during which the main power cannot be turned off. Basically, the processes 401 to 406 are the same as those in FIG. 4, but the display message indicates the time during which the main power cannot be turned off (for example, 2 in this example) as shown in FIG. 9B.
Time) is also displayed. The time during which the main power cannot be turned off is calculated by the control time 305 in FIG. After the process 406 for ending the message display, in a process 501, a time Te for ending the control is obtained using the control time 305 on the control table. In step 502, the control end time Te is compared with the current time, and when the current time reaches the control end time, the main power switch 1007b is turned off. According to this embodiment, the main power can be forcibly turned on only during the time specified by the broadcast station during the EMM data reception period, even though the user has turned off the main power switch 1007a, At that time, the EMM data can be received.

FIG. 6 shows a flowchart of still another embodiment of the present invention which reminds the user that the contract cannot be renewed when the main power is turned off, and respects the user's intention when the main power is turned off. When the user attempts to turn off the main power, for example, as shown in FIG. 9C, a message is displayed indicating that the contract is currently being renewed, and that the contract may not be renewed when the main power is turned off. At least during the display of this message, the switch 1007b is turned on,
2. The dotted line portion 1013 is in an energized state. If the main power is still to be turned off, the main power switch 1
Turn off 007b. In this embodiment, when the user turns off the main power, the intention is given priority. However, if the EMM data cannot be received, the contract data cannot be obtained, and the user is warned of the content. In such a case, the contract data cannot be acquired at that time, but since the EMM data reception period is usually considerably long, when the user subsequently receives the TV,
If it is in the data receiving period, the subsequent EMM data can be received.

In the receiving apparatus according to the embodiment of the present invention shown in FIG. 1, the main power switch is forcibly turned on by a main power switch that can be turned on and off by a user and a signal in the receiving apparatus. It consists of a main power switch, and when the user turns off the former, if the user is receiving EMM data, the latter switch is turned on to continue receiving the EMM data.

On the other hand, in another embodiment of the present invention whose block diagram is shown in FIG. 7, the main power switch is composed of only one switch 1007. In FIG. 7, the same reference numerals as those in FIG. 1 denote circuits and portions exhibiting the same operation. FIG. 8 shows an example of a flowchart of the operation of the receiving device when the user turns on the sub power switch 1010.

First, the user operates the sub power switch 1010
Is turned on, this is detected in processing 801 and it is determined in the next processing 401 whether the current time is within the EMM data reception period. If the current time is within the EMM data reception period, a message is displayed on the screen for a predetermined period in steps 404, 405, and 406. This message warns the user not to turn off the main power, for example, as shown in FIG. In this example, the message is displayed when the sub power switch is turned on. However, the message may be displayed at all times, or the message is displayed when the user performs another operation. You may do so.

In one embodiment of the present invention shown in FIG.
A warning is issued to the user not to turn off the main power switch during the reception period of the M data. However, if the warning is ignored and the power is turned off, the contract data cannot be obtained. But, of course, EM
The reception of the M data is detected, and during that period, even if the user attempts to turn off the main power switch 1007, the user can be prevented from turning off electronically or optically.
In this case, if a message indicating that the EMM data is being received and the main power cannot be turned off is displayed, the user may not be able to turn off the main power switch and the receiving device may be out of order. Don't worry.

[0058]

As described above, according to the present invention, in a broadcast receiving apparatus having a main power switch, the main power switch is turned off except for a period during which individual control information is basically received, that is, the entire receiving apparatus is turned off. As a result, the device can be set in the non-operation state, and further power saving can be performed. In addition, according to the present invention, during the period of receiving the individual control information, the main power is controlled not to be forcibly turned off, and a message is displayed to the user so that the main power is not turned off. Control information can be received without loss or as much as possible.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a broadcast receiving apparatus according to the present invention.

FIG. 2 is a diagram showing a configuration of EMM data according to the receiving apparatus of the present invention.

FIG. 3 is a diagram showing an example of a control table created from EMM data.

FIG. 4 is a flowchart showing an example of the operation of the broadcast receiving device of FIG. 1;

FIG. 5 is a flowchart showing the operation of another example of the present invention.

FIG. 6 is a flowchart showing the operation of another example of the present invention.

FIG. 7 is a block diagram of a receiving apparatus according to another embodiment of the present invention.

FIG. 8 is a flowchart showing an example of the operation of the broadcast receiving apparatus of FIG. 7 according to the present invention.

FIG. 9 is a view showing an example of a message displayed on a screen according to the present invention.

FIG. 10 is a block diagram for explaining the general broadcast receiving system as a whole.

[Explanation of symbols]

1006 ... broadcast receiving apparatus, 1007, 1007a,
1007b: Main power switch, 1008: Detection circuit, 1009: Standby power circuit, 1010: Sub power switch, 1011: Power circuit, 1012, 1
013: dotted line portion, 1105: tuner circuit, 1
106: decoder circuit, 1107: display circuit,
1108: control signal receiving circuit, 1109: control circuit, 1110: memory, 1112, 1113,...
· Non-volatile memory, 1201 ··· clock, 1202 ···
.Auxiliary control circuit, 1203 ... memory, 1204 ...
・ Key input circuit

Claims (11)

[Claims] 1. A broadcast receiving apparatus used in a broadcasting system for individually transmitting control information from a center to each broadcast receiving apparatus, comprising: receiving individual control information scheduled to receive individual control information transmitted from a center in advance; Means for receiving a period; means for storing the individual control information receiving period received by the unit; a clock for counting a current time; and comparing the current time counted by the clock with the individual control information receiving period. A first power supply circuit for supplying at least power to the comparison means and the timepiece; a first main power switch capable of controlling on / off of the supply of power by the first power supply circuit; A second power supply circuit for supplying power to portions other than the portion supplied with power by the power supply circuit; and turning on / off the power supply by the second power supply circuit. A sub power switch which can be controlled and is connected in series to the first main power switch; a detecting means for detecting the turning off of the first main power switch; and a current time within the individual information receiving period by the comparing means. In some cases, at least the first
And a main power-off preventing means for preventing the main power from being turned off when the main power switch is turned off. 2. When the main power is turned off by the main power-off preventing means, and when the comparing means detects that the current time is out of the individual control information receiving period, 2. The broadcast receiving apparatus according to claim 1, wherein the main power-off prevention means cancels the main power-off prevention. 3. The main power-off preventing means is a second main power switch which is turned on / off by detecting that the current time is within the individual control information receiving period by the comparing means. The broadcast receiving apparatus according to claim 1, wherein the main power switch is connected in parallel with the first main power switch. 4. When the comparing means detects that the current time is within the individual control information receiving period, the second time
When the first main power switch is turned off by the user during the individual control information reception period, the main power switch is detected to be turned off, and a warning message for turning off the main power is displayed. 4. The broadcast receiving apparatus according to claim 3, wherein the broadcast receiving apparatus outputs a video signal for the broadcast. 5. The information processing apparatus according to claim 1, further comprising means for detecting by the comparing means that the current time is within the individual control information receiving period and informing a user that the individual control information is being received. The broadcast receiving apparatus according to claim 1 or 3, wherein 6. The apparatus according to claim 5, further comprising a message output unit for notifying that the individual information is being received and outputting a message indicating that the main power cannot be turned off. Broadcast receiver. 7. A broadcast receiving apparatus used in a broadcast system for individually transmitting control information from a center to each broadcast receiving apparatus, wherein the individual control information receiving period transmitted from the center to each receiving apparatus is received and stored in advance. Receiving time storing means, a clock for counting the current time, a comparing means for comparing the current time counted by the clock with the individual control information receiving time stored by the receiving time storing means, A first power supply circuit that supplies at least power to the timepiece, a main power switch that can control on / off of the first power supply, and supplies power to a part other than a part that is supplied with power by the first power supply circuit A second power supply circuit, a sub-power switch capable of controlling on / off of the second power supply, and a main power supply switch for receiving the individual control information. Broadcast receiving apparatus characterized by a pitch comprising a said means for controlling the sub power switch on. 8. The apparatus according to claim 7, further comprising means for notifying a user that said individual control information is being received when said individual control information is being received. Broadcast receiving device. 9. A broadcast receiving apparatus used in a broadcasting system for individually transmitting control information from a center to each of the broadcast receiving apparatuses, wherein an individual control information receiving period transmitted from the center to each of the receiving apparatuses is received and stored in advance. Receiving time storage means, a clock for counting the current time, means for comparing the current time counted by the clock with the individual control information receiving period, and a power supply for supplying at least power to the comparing means and the clock. A first power supply circuit, a main power switch capable of controlling on / off of power supply by the first power supply circuit, and a second power supply circuit for supplying power to a portion other than a portion supplied with power by the first power supply circuit. A power supply circuit, and a sub-power switch connected in series with the main power switch, which can control on / off of power supply by the second power supply circuit. Broadcast receiver current time by the step is characterized by including a means for performing the alert display so as not to turn off the main power to the user when it is detected that the within individual information reception period. 10. A broadcast receiving apparatus used in a broadcasting system for individually transmitting control information from a center to each of the broadcast receiving apparatuses, wherein an individual control information receiving period transmitted from the center to each of the receiving apparatuses is received and stored in advance. Receiving time storage means, a clock for counting a current time, a comparing means for comparing the current time counted by the clock with the individual control information receiving period, and a power supply for supplying power to at least the comparing means and the clock. A first power supply circuit, a main power switch capable of controlling on / off of power supply by the first power supply circuit, and a second power supply circuit for supplying power to a portion other than a portion supplied with power by the first power supply circuit. A power supply circuit, and a sub-power switch connected in series to the main power switch and capable of controlling on / off of power supply by the second power supply circuit. Broadcast receiving apparatus, wherein a current time to prevent off of the first main power switch when it is detected that the within individual information reception period by the comparison means. 11. The apparatus according to claim 10, further comprising means for notifying a user that said individual control information is being received to said user when said individual control information is being received. Broadcast receiver.