JP2002094404A - Broadcast receiver - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a broadcast receiving apparatus capable of adjusting viewing control in which a broadcast program is stored to meet a broadcast station or a program distributor. A broadcast station sends information (hereinafter, service schedule information) indicating a period during which a program can be reproduced to a broadcast receiving device, and uses the service schedule information separated by a separating unit 103 in the broadcast receiving device. And I
The C card 105 determines whether the service can be provided to the viewer, and outputs the scramble key data Ks to the descrambler 104 and descrambles the scramble key data Ks only when the service is good. The service schedule information includes a time at which a service that meets the wishes of the broadcast station and the distributor of the program can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for receiving pay broadcasts, and more particularly, to a broadcast receiving apparatus using a once-stored pay broadcast.

[0002]

2. Description of the Related Art In the United States, TV receivers having a built-in recording function using an HDD (hard disk drive) have been put into practical use.
INC. Provides a service using a recording function of recording using an HDD.

In addition, Nikkei Electronics (April 2000
24, March 57, pages 57 to 62), the standardization organization "TV Anytime Foru"
m ”uses a storage device such as an HDD, and has a function that allows a user to view recorded programs at any time.
Standardization work is under way to realize a receiver.

[0004] In the above-described broadcast receiving apparatus incorporating a storage device or a broadcast receiving device connecting and using a storage device,
Various problems are expected in combination with the existing broadcasting service. For example, the following problems are conceivable in the storage and reception of a pay broadcast program.

In pay broadcasting, pay-per-view (hereinafter referred to as PP)
V) There is a service called broadcasting. This PPV is, for example,
It is a service that allows the user to purchase a program for each program, and the viewer only has to pay the viewing fee as he sees it. Regarding the adjustment of the viewing fee when using the PPV service, a method is generally adopted in which a broadcasting station collects viewing information indicating the viewing status from a pay broadcast receiving device through a telephone line and makes an adjustment.

[0006] In the PPV service, it is assumed that the time of providing the PPV program is limited. This is a time determined by subtracting the time required for collecting the viewing information from this time, for example, when the broadcasting station and the distributor of the program have previously determined the time to pay the PPV sales. The broadcast station will not broadcast the PPV program beyond this time.

[0007] However, assuming storage reception, it is conceivable that the PPV program is reproduced and viewed by the viewer even after the time intended by the broadcasting station. If viewing information is stored in the pay broadcast receiving device after the time intended by the broadcasting station and collection of the viewing information is performed with a delay, inconvenience may occur for the broadcasting station and the program distributor. Is assumed.

The above description relates to the PPV service. However, in a so-called tier service in which a contracted channel can be viewed by paying a fixed amount of viewing fee during a contract period such as a month, a broadcasting station and a program distribution source are also provided. If desired, there may be a desire not to be able to view the stored programs unlimitedly but to limit the period.

[0009]

As described above, in the conventional broadcast receiving apparatus, there is a problem that the viewing control in which the pay broadcast is stored cannot be realized so as to meet the demands of the broadcast station or the program distributor. Also, it was not user friendly. Further, a broadcast receiving apparatus with high security could not be provided.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a broadcast receiving apparatus which can control viewing and listening of broadcast programs stored therein in accordance with a broadcast station or a program distributor. It is another object of the present invention to provide a user-friendly broadcast receiving device. It is another object of the present invention to provide a broadcast receiving apparatus that controls storage and reproduction while maintaining security.

[0011]

In order to achieve the above object, according to the present invention, there is provided a latest time information storage means for storing the latest time information multiplexed in a broadcast signal; Available time period information extracting means for extracting available time period information indicating a usable time period of the broadcast signal multiplexed into the broadcast signal; the latest time information input from the latest time information storage means; Determining means for determining whether or not the broadcast signal is available by comparing the available time information input from the period information extracting means; and determining that the broadcast signal is available when the determination means determines that the broadcast signal is available. Control means for controlling use of the broadcast signal when it is determined that the broadcast signal is not usable.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A broadcast station sends information (hereinafter, service schedule information) indicating a period during which a program can be reproduced to a broadcast receiving apparatus. It is determined whether the service can be provided to the viewer using the schedule information, and the service is provided if the service is good. As criteria for determining using the service schedule information,
It is assumed that the broadcast receiving apparatus includes a calendar and a clock or a functional block equivalent thereto, and performs comparison and determination between the standard and service schedule information.

The service schedule information will be described in more detail. The service schedule information is, for example, information indicating that a time limit is determined and that the service schedule information cannot be used after the specified time limit. This service schedule information is inserted into the ECM and sent from the broadcast station side.

The unit for designating the term of the service schedule information is year, month, day, hour, minute, second, and the like. For example, the designation is permitted until 15:00 on October 10, 2000, or not permitted until 15:00 on October 10, 2000.

[0015] The other service schedule information is that a predetermined period is permitted or not permitted. This is also specified in units of year, month, day, hour, minute,
Seconds, etc. For example, from October 1, 2000, 20
Yes during October 5, 2000, or 10:00 to 2
Available daily from 0:00 to 10:00 to 16:00 from October 1, 2000 to October 5, 2000.
During 00, it is possible.

In this specification, a case where a broadcast is received and processed by a broadcast receiving apparatus is expressed as a viewer watching a broadcast, which is an appropriate expression for a TV program composed of video and audio. However, broadcasts that do not have audio (or video) even when played back by a broadcast receiving device in data broadcasting and the like and enjoyment of services by viewer operations such as interactive data services are expressions that collectively watch broadcasts. This will be described as a generic term.

In the case of restricting storage-type viewing in the case of a pay broadcast program, it is necessary to impose security restrictions. The security constraint means that the viewer cannot easily release the restriction of the storage-type viewing by operating or modifying the broadcast receiving apparatus. Generally, pay broadcast receivers use IC cards to perform viewing management, that is, processing that requires security protection. However, IC cards are devices that are difficult for viewers to modify easily. It is used. All the embodiments of the present invention for restricting storage-type viewing in the case of a pay broadcast program will be described below on the assumption that an IC card is used.

In the case where viewing is restricted in the storage and reception of a pay broadcast program, the ECM is used. ECM
For details of ARIB, refer to ARIB's BS digital broadcast conditional access system standard "ARIB STD-B25 Heisei 1
The details are omitted here because they are described in detail in “Version 1.0 on October 26, 2001”.

The ECM is a scramble key used for descrambling a signal scrambled in a receiving apparatus in pay broadcasting, and information which is a source for determining in a broadcast receiving apparatus whether or not a broadcast viewing contract is permitted. Information including the time information (year, month, day, hour, minute). This ECM
Is securely transmitted from the broadcasting station to the IC card while being encrypted. The scramble key and time information (year, month, day, hour, minute) in the ECM are updated periodically. For example, in the case of BS digital broadcasting in Japan, the information is updated once every several seconds to several tens of seconds. It is being broadcast.

When the broadcast receiving apparatus inputs the ECM into the IC card during pay broadcast viewing, the ECM is decrypted in the IC card, and the ECM is compared with contract information stored in the broadcast receiving apparatus in advance. If it is determined that viewing is possible, the scramble key in the ECM is output from the IC card to the broadcast receiving device. Then, the broadcast receiving apparatus descrambles the program signal (eg, video and audio) using the scramble key and returns the signal to a viewable signal.

When watching a pay broadcast as described above,
The content of the ECM is input to the IC card every time the content of the ECM is updated (about once every several seconds to several tens of seconds). Therefore, the latest time information (year, month, day, hour, minute) is obtained by referring to the time information (year, month, day, hour, minute) in the ECM without having a clock or a calendar circuit in the IC card. be able to. In this embodiment, the time information (year, month, day, hour, minute) is always updated and stored in the IC card.

(Accumulation / Reproduction) When the broadcast reception apparatus processes a signal accumulated / reproduced by using an IC card in which the latest time is input and stored by the ECM in the same manner as in (1) real-time viewing, Into the IC card,
In addition to the normal viewing permission / inhibition judgment of performing viewing permission / inhibition using an IC card, (2) the latest time information (year, month, day, hour, minute) stored in the IC card and the time information (year, month, month By comparing and determining day, hour, and minute, the time lag is detected, and it is determined whether or not viewing is permitted.

That is, the broadcast station refers to the service schedule information described in the ECM and compares and determines whether or not the stored time information is restricted.

(Description of Configuration of First Embodiment) FIG. 1
1 is a block diagram illustrating an embodiment of a broadcast receiving device according to the present invention.

This broadcast receiving device has a built-in storage device. As the storage device, a hard disk drive (HDD) will be described as an example, but other magnetic recording media such as D-VHS, optical recording media such as DVD-RAM, and magneto-optical recording media such as MO are used. It is possible.

In FIG. 1, a broadcast signal sent from a broadcast station is supplied to a storage device 101 and a selector 102 via an antenna and a tuner (not shown). When the viewer watches in real time, the selector 102 selects the broadcast signal transmitted directly without passing through the storage device 101, and when viewing the program already stored in the storage device 101, the selector 102 selects the broadcast signal. 102 selects a broadcast signal from the storage device 101 and outputs it to the separation unit 103. As the storage device 101, for example, an HDD is used.

In practice, it is conceivable to store a plurality of programs in the storage device 101. When storing a plurality of programs, it is necessary to select a program, but the description is omitted because it is not directly related to the present invention.

The separating section 103 separates a scrambled video / audio signal and an ECM (including a service schedule) from the broadcast signal supplied from the selector 102. The scrambled video / audio signal separated by the separation unit 103 is supplied to a descrambler 104. The ECM separated by the separation unit 103 is the IC card 10
5. The descrambler 104 descrambles the scrambled video / audio signal input from the separation unit 103 using the scramble key data Ks input from the IC card 105, and outputs the descrambled video / audio signal to the MPEG decoder 107. I do.

The MPEG decoder 107 decodes the video / audio signal input from the descrambler 104 into a video / audio signal according to the MPEG system, and outputs the decoded video / audio signal to the on-screen processing unit 108.

The on-screen processing unit 108 is an MPEG
On-screen processing is performed according to the video / audio signal input from the decoder 107 and the control signal input from the IC card 105, and the TV finally displayed on the TV screen
The signal is output to a TV (not shown) as a signal.

The IC card 105 determines whether or not viewing is possible according to the ECM input from the separating unit 103 and service schedule information included in the ECM, in addition to the contents of the normal contract, and when viewing is possible, scrambling in the ECM is performed. Key K
s is extracted and output to the descrambler 104, and the scramble key Ks is not output to the descrambler 104 when viewing is not permitted. Also, the IC card 105 sends the viewing history information of the pay-per-view program to the center side (broadcasting station / program provider) via the modem 106 for a predetermined period designated in advance.

The service schedule information is ECM
Although described as being inserted inside, it may be sent separately from the ECM.

(Explanation of the operation of the first embodiment)
Broadcast receiving apparatus and IC card 1 configured as above
The operation 05 will be described in detail with reference to the flowchart of FIG.

As shown in FIG. 2, the IC card 105
The ECM is received regardless of whether the input signal is a real-time signal or a stored and reproduced signal. If the ECM can be received in step 201, the process proceeds to the next step 202,
If the ECM cannot be received, the IC card 105 ends the pay broadcast receiving process (Step 201).

In the next step 202, the IC card 10
5 compares the time information (year, month, day, hour, minute) described in the received ECM with the time information (year, month, day, hour, minute) stored in the IC card 105, and It is determined whether or not the time information (year, month, day, hour, minute) described in (1) is newer than the time information (year, month, day, hour, minute) stored in the IC card 105.

In the determination of step 202, the received ECM
The time information (year, month, day, hour, minute) described in the time information (year, month, day, hour, minute) stored in the IC card 105
When the time is newer, the time information (year, month, day, hour, minute) stored in the IC card 105 is replaced with the time information (year, month, day, hour, minute) described in the newly received ECM. Update (step 203) and proceed to step 204.

In the determination in step 202, the time information (year, month, day, hour, minute) described in the received ECM is obtained.
Is older than the time information (year, month, day, hour, minute) stored in the IC card 105, the process proceeds to step 204.

If the received signal is a real-time signal, the latest time information (year, month, day, hour, minute) is stored in the IC card 105 by the processing up to this point. However, if the time information (year, month, day, hour, minute) that is newer than the time information (year, month, day, hour, minute) stored in the IC card 105 is reproduced even with the accumulated reproduction signal, this accumulation, reproduction ECM
May be stored in the IC card 105.

In the next step 204, the time information (year, month, day,
The hour and minute) and the service schedule information described in the ECM input from the separation unit 103 to the IC card 105 are compared by the IC card 105.

As a result of the comparison in step 204, the IC
Time information stored on the card 105 (year, month, day, hour, minute)
Is within the range in which the time information (year, month, day, hour, minute) indicated by the service schedule information can be viewed, the contract information in the IC card 105 and the ECM (Entitlem
ent Control Message) (step 205).

The contract information is information that is encrypted and distributed from the broadcasting station, and is EMM (Entitlement Management).
Message).

If it is determined in step 205 that the IC card 105 has a contract and is viewable, the broadcast receiver is controlled to provide a pay broadcast program (step 206). More specifically, this control is to output the scramble key data Ks from the IC card 105 to the descrambler 104, for example, when the pay broadcast program being reproduced can be viewed with a tier viewing contract. Alternatively, if the pay broadcast program being reproduced is viewable with a viewing contract by PPV, the viewer is urged to purchase. Further, when the viewer purchases the program, the scramble key data Ks is output from the IC card 105 to the descrambler 104. In steps other than step 206, no control is provided so that a pay broadcast program is provided.

In step 204, the IC card 10
When it is determined that the time information (year, month, day, hour, minute) stored in 5 is out of the viewable range of the time information (year, month, day, hour, minute) indicated by the service schedule information, ,
By outputting a control signal from the IC card 105 to the TV for displaying that it is out of the pay broadcast program providing time to the on-screen processing unit 108 without providing the pay broadcast program, the viewer is notified. (Step 2
10).

In step 205, the IC card 10
If it is determined that No. 5 does not have a contract and cannot view the program, a control signal for displaying on the TV that the contract is out of the contract is output from the IC card 105 to the on-screen processing unit 108 without providing the pay broadcast program. , A notification is sent to the viewer (step 208).

In the flow in which step 206 is not executed, specifically, the IC card 105 sends the descrambler 104
Since the descrambling key data Ks is not output, no program is provided.

As described above, the broadcast receiving apparatus according to the present invention can control viewing and storage of broadcast programs to meet the demands of broadcast stations and program distributors.

(Second Embodiment) In a pay broadcast, there are two types of methods for imposing a fee (hereinafter referred to as charging), and each program belongs to one of them. Which one it belongs to is determined in advance by a contract with a broadcaster. (1) Pay-per-view (PPV) viewing broadcasting in which a viewer can select purchase for each program. (2) A flat-rate viewing method called a tier (or flat), for example, a fixed monthly fee.

As a broadcasting station, depending on the difference in charging method,
There is a demand to change the availability of playback / viewing, and in the present embodiment, the broadcasting station changes availability of playback / viewing depending on the charging method. For example, the program selected by the viewer is PP
If the program is a V-contracted program, whether or not reproduction / viewing is possible is determined by determining whether or not the program is within the range that can be viewed in the service schedule information (for example, within one month after broadcasting). decide.

In the first embodiment, the same service schedule information is used irrespective of the type of pay broadcast (PPV contract / tier contract). However, in the second embodiment, the service schedule information for the program of the PPV contract is E
It is inserted into the CM and sent from the broadcast station. For this reason,
Further, information for controlling whether or not viewing is possible by a charging method for pay broadcasting is multiplexed.

For example, in the service schedule information,
It is assumed that information is described as to which charging method of pay broadcasting restricts storage and reproduction. PPV
Information that restricts reproduction and viewing of a contract program or a tier contract program or restricts reproduction and viewing of both a PPV contract and a tier contract program is described.

In the second embodiment, information for restricting reproduction and viewing of a program of a pay broadcast PPV contract is multiplexed in the service schedule information.

The billing method may be specified for a program, but may be changed for each viewer. For example, it is possible that a certain viewer subscribes to a sports broadcast performed on a certain channel in a season contract, that is, a fixed-rate viewing method, while another contractor selects and watches one program at a time without a season contract. is there.

The second embodiment will be described with reference to FIGS.

Since the configuration of this embodiment is the same as that of FIG. 1, the description will be omitted, and the operation will be described with reference to FIG. Steps 301 to 303 in FIG. 3 are the same as steps 201 to 203 in FIG.

In step 305, it is determined whether the IC card 105 has a PPV contract / a tier contract / a PPV contract and no tier contract.

If the IC card 105 determines in the step 305 that the program has a tier contract, the receiver is controlled to provide the tier contract program (step 306). Specifically, this control is to output the scramble key data Ks from the IC card 105 to the descrambler 104.

If the IC card 105 determines in step 305 that the program has neither a tier contract nor a PPV contract,
The paid broadcast program is not provided, and the IC card 105 is not provided.
By outputting a control signal for causing the TV to display on the TV that the program is out of contract to the on-screen processing unit 108, the viewer is notified (step 308).

In step 305, the IC card 105
If it is determined that the program has a V contract, the IC card 105
It is determined whether it is within the service providing time of the program of the PV contract (step 307). Specifically, the time information (year, month, day, hour, minute) stored in the IC card 105 is used to view the time information (year, month, day, hour, minute) indicated by the service schedule information transmitted for PPV. The IC card 105 determines whether or not it is within the allowable range.

At step 307, the IC card 105
If it is determined that it is within the period in which the program of the V contract can be viewed, the receiver is controlled to provide the program of the PPV contract (step 309). “Providing a program under a PPV contract” means that a viewer can purchase a PPV program. When the program is purchased, the purchase information is stored in the memory, and the scramble key data Ks is output from the IC card 105 to the descrambler 104, so that the scramble is released.

At step 307, the IC card 105
If it is determined that the program is out of the period in which the V-contracted program can be viewed, the pay-broadcast program is not provided and
From 2005, a control signal for displaying on the TV a display indicating that the program is out of the provision time of the program of the PPV contract is output to the on-screen processing unit 108, thereby notifying the viewer (step 310).

In the flow not passing through steps 306 and 309, no scramble key data Ks is output from the IC card 105 to the descrambler 104, so that no program is provided.

As described above, the broadcast receiving apparatus according to the present invention can control the viewing and listening of the stored broadcast program so as to meet the demands of the broadcast station and the distributor of the program.

(Third Embodiment) In the second embodiment, the case where reproduction / viewing is disabled in a program under a PPV contract has been described. However, a broadcast station restricts a program under a tier contract. Is also good. In the third embodiment, tier contract programs are restricted.

In the second embodiment, information for restricting reproduction and viewing of a program of a pay broadcast PPV contract is multiplexed in the service schedule information. But,
In the third embodiment, service schedule information for a tier contract program is inserted into the ECM and transmitted from the broadcast station. In the third embodiment, as in the second embodiment, information for controlling whether or not viewing is permitted is further multiplexed by a method of charging a pay broadcast.

For example, in the service schedule information,
It is assumed that information is described as to which charging method of pay broadcasting restricts storage and reproduction. PPV
Information that restricts reproduction and viewing of a contract program or a tier contract program or restricts reproduction and viewing of both a PPV contract and a tier contract program is described.

In the third embodiment, information for restricting reproduction and viewing of a program of a pay broadcast tier contract is multiplexed in the service schedule information.

The billing method may be specified for a program, but may be changed for each viewer. For example, it is possible that a certain viewer subscribes to a sports broadcast performed on a certain channel in a season contract, that is, a fixed-rate viewing method, while another contractor selects and watches one program at a time without a season contract. is there.

The third embodiment will be described with reference to FIGS.

Since the configuration of the present embodiment is the same as that of FIG. 1, the description will be omitted, and the operation will be described with reference to FIG. Steps 401 to 403 in FIG. 4 are the same as steps 201 to 203 in FIG.

In step 405, it is determined whether the IC card 105 has a PPV contract / a tier contract / there is no PPV contract and no tier contract.

In step 405, the IC card 105
If the program is determined to have a V contract, the receiver is controlled to provide a program with a PPV contract (step 406). Specifically, this control is to output the scramble key data Ks from the IC card 105 to the descrambler 104.

If the IC card 105 determines in step 405 that the program has neither a tier contract nor a PPV contract,
The paid broadcast program is not provided, and the IC card 105 is not provided.
By outputting a control signal for displaying on the TV that the program is out of the contract from the TV to the on-screen processing unit 108, the viewer is notified (step 408).

If the IC card 105 determines in step 405 that the program has a tier contract, it is determined whether the IC card 105 is within the service providing time of the program of the tier contract (step 407). Specifically, the time information (year, month, day, hour, minute) stored in the IC card 105 is used to view the time information (year, month, day, hour, minute) indicated by the service schedule information transmitted for PPV. The IC card 105 determines whether or not it is within the allowable range.

If it is determined in step 407 that the IC card 105 is within the period in which the program of the tier contract can be viewed, the receiver is controlled to provide the program of the tier contract (step 409). "Providing a program with a tier contract" means descrambling so that a viewer can view a program with a tier contract. The scramble key data Ks is output from the IC card 105 to the descrambler 104, and the scramble is released.

If it is determined in step 407 that the IC card 105 is outside the period in which the program of the tier contract can be viewed, the pay card broadcast program is not provided and the IC card 1
From 2005, a control signal for causing the TV to display a display indicating that the program is out of the provision time of the tier contract program is output to the on-screen processing unit 108, thereby notifying the viewer (step 410).

In the flow not passing through steps 406 and 409, no scramble key data Ks is output from IC card 105 to descrambler 104, so that no program is provided.

As described above, the viewing control in which the broadcast program is stored by the broadcast receiving apparatus of the present invention can be made to meet the demands of the broadcasting station and the program distributor.

The above embodiment has been described on the assumption that a storage device is incorporated. However, in any of the embodiments, as shown in FIG. 5, the storage device 11 is outside the broadcast receiving device, and the broadcast receiving device receives a real-time broadcast from the terminal 501 and inputs a signal for storage and reproduction from the terminal 502. However, the same effect can be obtained.

Further, by using the service schedule information multiplexed on the broadcast signal, it is possible to control the storage and reproduction of the pay broadcast program outside the time specified by the broadcast providing side, and the control cannot be performed. Conventional problems can be solved.

Further, by using the service schedule information multiplexed on the broadcast signal, it is possible to control the storage and reproduction outside the time specified by the broadcast provider, and to control the reproduction when the reproduction is prohibited. In addition to displaying the message to the effect that the viewer can be recognized, it is possible to control so as not to cause a problem by controlling so that the reproduction is not performed even if the viewer erroneously operates.

Further, by performing processing for determining whether or not storage reproduction is possible in the IC card, storage reproduction can be controlled while maintaining security.

[0082]

As explained above, according to the present invention,
Since the service is performed according to the service schedule information, the viewing control in which the broadcast program is stored can be made to meet the demands of the broadcast station and the program distributor.

[Brief description of the drawings]

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

FIG. 2 is a flowchart for explaining the operation of the broadcast receiving device.

FIG. 3 is a flowchart for explaining the operation of the broadcast receiving device.

FIG. 4 is a flowchart for explaining the operation of the broadcast receiving device.

FIG. 5 is a block diagram illustrating the configuration of a broadcast receiving apparatus according to the present invention.

[Explanation of symbols]

101: storage device (HDD), 102: selector, 10
3 ... Separation unit, 104 ... descrambler, 105 ... IC card, 106 ... modem, 107 ... MPEG decoder, 1
08 ... On-screen processing unit.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04N 7/16 H04N 5/91 LF term (reference) 5C053 FA23 FA25 FA30 HA40 JA22 JA30 KA24 LA07 5C064 BA07 BB02 BB02 BC06 BC10 BC17 BC20 BC25 BD08 BD09 CA14 CB08 5K061 AA14 BB07 BB17 CC00 FF00 FF11

Claims (7)

[Claims] 1. A latest time information storage means for storing latest time information multiplexed on a broadcast signal, and an available period indicating an available period of the broadcast signal multiplexed on the input broadcast signal. Usable period information extracting means for extracting information; comparing the latest time information inputted from the latest time information storing means with the usable period information inputted from the usable time information extracting means. Determining means for determining whether or not the broadcast signal is available; controlling the broadcast signal to be used when the determination means determines that the broadcast signal is available, and not to be used when determining that the broadcast signal is not available A broadcast receiving apparatus comprising: 2. A latest time information storage means for storing latest time information multiplexed on a broadcast signal, and a viewable period indicating a viewable period of the broadcast signal multiplexed on the input broadcast signal. Viewable period information extracting means for extracting information; comparing the latest time information inputted from the latest time information storage means with the viewable period information inputted from the viewable period information extracting means; Determining means for determining whether or not the broadcast signal can be viewed, and controlling the broadcast signal to be viewed if the determination means determines that the broadcast signal can be viewed, and not to be viewed if the determination means determines that the broadcast signal cannot be viewed A broadcast receiving apparatus comprising: 3. A latest time information storage means for storing latest time information multiplexed on a broadcast signal, a viewable period of the broadcast signal multiplexed on the input broadcast signal, and a time limit of the broadcast signal. Viewable condition extracting means for extracting a viewable condition indicating a program charging method; the latest time information input from the latest time information storage means; and the viewable condition input from the viewable condition extractor. And determining whether the broadcast signal is viewable by comparing the broadcast signal with the broadcast signal when the determination means determines that the broadcast signal is viewable, and the broadcast signal when determining that the broadcast signal is not viewable. Control means for controlling so as not to view the broadcast. 4. The broadcast receiving apparatus according to claim 1, further comprising a storage unit that stores and reproduces the broadcast signal. 5. The system according to claim 1, further comprising: a notifying unit that notifies the user that the period is not available when the determining unit determines that the period is not available.
The broadcast receiving device according to any one of claims 1 to 3. 6. The broadcast receiving apparatus according to claim 5, wherein said control means stops reproduction of said storage / reproduction means when determining that the period is not available. 7. The broadcast receiving apparatus according to claim 1, wherein the usable period information is used by encrypting and decoding information transmitted from a broadcasting station after being encrypted. apparatus.