JP2010081059A - Receiving system, reception method and reception program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a receiving system, reception method and reception program capable of making compatible viewing of non-scramble broadcasting and the viewing of scramble broadcasting. <P>SOLUTION: The receiving system includes a separation part 22 for separating non-scramble broadcasting data and scramble broadcasting data on the basis of digital broadcasting data, a reproduction part 24 for performing data reproduction processing, and a storage part 23 for storing the data. The separation part 22 outputs the non-scramble broadcasting data to the reproduction part 24 and outputs the scramble broadcasting data to the storage part 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a reception system, a reception method, and a reception program for receiving digital broadcast data in which non-scrambled unscrambled broadcast data and scrambled scrambled broadcast data are superimposed.

  Conventionally, a receiving system for receiving digital broadcast data is known. Here, a case where the digital broadcast data is scrambled is considered. Therefore, the receiving system needs to cancel the scramble applied to the digital broadcast data. Specifically, the receiving system reads from an IC card (for example, a BCAS (BS Conditional Access System) card) that stores a scramble key. The receiving system uses the scramble key to release the scramble applied to the digital broadcast data (for example, Patent Document 1).

  Also, a card type tuner having an IC card I / F for mounting an IC card and a tuner for receiving digital broadcast data has been proposed (for example, Patent Document 2). The card type tuner is attached to a digital broadcast receiver.

  In recent years, broadcasts of unscrambled unscrambled broadcast data and digital broadcast data including scrambled scrambled broadcast data have attracted attention. Non-scrambled broadcast is, for example, one-segment broadcast, and scrambled broadcast is, for example, full-segment broadcast.

  In the one-segment broadcasting, one segment is used among 13 segments constituting one channel. In the full segment broadcasting, the remaining 12 segments among the 13 segments constituting one channel are used. Thus, the information amount of non-scrambled broadcast data is smaller than the information amount of scrambled broadcast data.

  Since non-scrambled broadcast data does not require descrambling, descrambling of non-scrambled broadcast data is not required. Therefore, the reproduction load of non-scrambled broadcast data is smaller than the reproduction load of scrambled broadcast data.

Against this background, mobile terminals (for example, mobile phones, mobile game machines, etc.) having a function of reproducing non-scrambled broadcast data have been proposed.
Japanese Patent Laid-Open No. 11-122550 JP 2004-056487 A

  As described above, the information amount of non-scrambled broadcast data is smaller than the information amount of scrambled broadcast data. Therefore, the quality of content (video, audio, etc.) reproduced by non-scrambled broadcast data is worse than the quality of content (video, audio, etc.) reproduced by scrambled broadcast data.

  Therefore, the user's needs cannot be sufficiently satisfied only by reproducing the non-scrambled broadcast data. On the other hand, there is a need to easily watch one-segment broadcasting.

  Therefore, the present invention has been made to solve the above-described problem, and a receiving system that enables both viewing of non-scrambled broadcasting such as one-segment broadcasting and viewing of scrambled broadcasting such as full-segment broadcasting, It is an object to provide a receiving method and a receiving program.

  The receiving system according to the first feature receives digital broadcast data in which unscrambled unscrambled broadcast data and scrambled scrambled broadcast data are superimposed. The receiving system includes a separation unit (separation unit 22) that separates the non-scrambled broadcast data and the scrambled broadcast data based on the digital broadcast data, a reproduction unit (reproduction unit 24) that performs data reproduction processing, A storage unit (storage unit 23) for storing data. The separation unit outputs the non-scrambled broadcast data to the reproduction unit, and outputs the scrambled broadcast data to the storage unit.

  According to this feature, the separation unit outputs unscrambled broadcast data that has not been scrambled to the reproduction unit. On the other hand, the separation unit outputs the scrambled broadcast data subjected to the scramble to the storage unit. That is, the scrambled broadcast data is stored in the storage unit in order to perform the descrambling later even in an environment in which the scramble applied to the scrambled broadcast data cannot be released.

  As a result, the user can view the non-scrambled broadcast immediately and can view the scrambled broadcast later. In this way, both viewing of non-scrambled broadcast and viewing of scrambled broadcast can be achieved.

  The first feature further includes a determination unit (determination unit 27a) that determines whether or not a descrambling unit that cancels scrambling applied to the scrambled broadcast data can be used. When the descrambling unit can be used, the separation unit outputs the scrambled broadcast data to the descrambling unit instead of the storage unit.

  1st characteristic WHEREIN: The determination part (determination part 27a) which determines whether it is possible to use the descramble part which cancels | releases the scramble given to the said scramble broadcast data, and using the said descramble part A request unit (request unit 27b) that requests the descramble unit to release the scramble applied to the scrambled broadcast data stored in the storage unit.

  The receiving method according to the second feature receives digital broadcast data in which non-scrambled unscrambled broadcast data and scrambled scrambled broadcast data are superimposed. The receiving method includes the steps of separating the non-scrambled broadcast data and the scrambled broadcast data based on the digital broadcast data, performing a reproduction process of the non-scrambled broadcast data, and storing the scrambled broadcast data. Performing steps.

  The reception program according to the third feature is a program for receiving digital broadcast data in which unscrambled unscrambled broadcast data and scrambled scrambled broadcast data are superimposed. The receiving program includes a step of separating the non-scrambled broadcast data and the scrambled broadcast data based on the digital broadcast data, a step of reproducing the non-scrambled broadcast data, and a process of storing the scrambled broadcast data. Causing the computer to execute the steps to be performed.

  According to the present invention, it is possible to provide a receiving system, a receiving method, and a receiving program that allow both viewing of non-scrambled broadcasting and viewing of scrambled broadcasting.

  Hereinafter, a reception system according to an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

  However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[First Embodiment]
(Configuration of receiving system)
Hereinafter, the receiving system according to the first embodiment will be described with reference to the drawings. FIG. 1 is a diagram illustrating a receiving system 100 according to the first embodiment.

  As illustrated in FIG. 1, the reception system 100 includes a tuner device 10, a terminal device 20, and a descrambling device 30. In the first embodiment, the receiving system 100 receives digital broadcast data in which non-scrambled broadcast data and scrambled broadcast data are superimposed. Non-scrambled broadcast data is, for example, one-segment broadcast data that has not been scrambled. The scrambled broadcast data is, for example, scrambled full-segment broadcast data.

  Here, when digital broadcast data including one-segment broadcast data and full-segment broadcast data is exemplified as digital broadcast data corresponding to one broadcast station, the digital broadcast data is broadcast using one channel. One channel has, for example, 13 segments. One-segment broadcasting data, which is an example of non-scrambled broadcasting data, is broadcast using one segment out of thirteen segments. Full segment broadcast data, which is an example of scrambled broadcast data, is broadcast using the remaining 12 segments out of 13 segments.

  The tuner device 10 is a device that receives digital broadcast data. The tuner device 10 is connected to the terminal device 20. The tuner device 10 has, for example, a USB interface and is connected to the terminal device 20 via a USB cable. That is, the tuner device 10 is configured to be detachable. Details of the tuner device 10 will be described later (see FIG. 4).

  The terminal device 20 is a terminal device such as a notebook computer. The terminal device 20 acquires digital broadcast data from the tuner device 10. The terminal device 20 acquires both non-scrambled broadcast data and scrambled broadcast data from the tuner device 10. The terminal device 20 may incorporate the tuner device 10. Details of the terminal device 20 will be described later (see FIG. 5).

  The descrambling device 30 is a device for releasing the scramble applied to the scrambled broadcast data. The descrambling device 30 is connected to the terminal device 20. The descrambling device 30 has, for example, a USB interface and is connected to the terminal device 20 via a USB cable. That is, the descrambling device 30 is configured to be detachable. Details of the descrambling device 30 will be described later (see FIG. 7).

(Configuration of digital broadcast data)
Hereinafter, the configuration of digital broadcast data according to the first embodiment will be described with reference to the drawings. 2 and 3 (a) to 3 (d) are diagrams for explaining the digital broadcast data according to the first embodiment.

  As described above, digital broadcast data corresponding to one broadcast station is broadcast using one channel. On the other hand, in digital broadcasting, a plurality of digital broadcast data corresponding to each broadcasting station is broadcast. Therefore, in digital broadcasting, information (PSI: Program Specific Information) for managing a plurality of channels corresponding to each broadcasting station is broadcast. Information such as PSI is packetized.

  Digital broadcast data corresponding to one broadcast station includes information (SI; Stream Information) for managing one channel and various information (ES; Elementary Stream) such as video and audio. Digital broadcast data is packetized.

  First, the configuration of the packet will be described with reference to FIG. As shown in FIG. 2, a packet constituting digital broadcast data is constituted by a header and a payload.

  The header includes information indicating the type of payload (PID; Packet Identifier, which will be described later). The payload includes PSI, SI, video information, audio information, data information, and the like.

  As shown in FIG. 2, the header includes synchronization information (a), error display (b), start display (c), priority (d), PID (e), scramble control (f), and so on. , Additional information control (g) and order display (h).

  The synchronization information (a) is a bit string (for example, 8 bits) for identifying the head of the packet. The error display (b) is a bit string (for example, 1 bit) indicating whether there is an error in the packet. The start display (c) is a bit string (for example, 1 bit) indicating the beginning (start position) of the payload. The priority (d) is a bit string (for example, 1 bit) indicating the priority of the packet.

  PID (e) is a bit string (for example, 13 bits) indicating the type of packet (payload). As described above, the payload includes PSI, SI, video information, audio information, data information, and the like. That is, the PID indicates which information is included in the payload.

  The scramble control (f) is a bit string (for example, 2 bits) indicating a scramble method (mode). The scramble method (mode) includes a scramble method (mode).

  The additional information control (g) is a bit string (for example, 2 bits) indicating whether additional information is included. The additional information is, for example, a program reference time (PCR: Program Clock Reference).

  The order display (h) is a bit string (for example, 4 bits) indicating the continuity of packets for each PID. The order display (h) is used to determine whether or not packets are continuous for each PID.

  Second, typical packet types will be described with reference to FIGS. 3 (a) to 3 (d). As described above, the type of packet (payload) is identified by the PID.

As shown in FIG. 3A to FIG. 3D, the types of packets (payloads) are ECM (Entitlement Control Message), video information (V), audio information (A), data information (D), and the like. is there.

  Here, the ECM includes information used to acquire a scramble key used for descrambling.

  Note that the packet including the video information (V) and the packet including the audio information (A) are scrambled. The packet including the data information (D) may be scrambled or may not be scrambled. Packets containing ECM are not scrambled.

(Configuration of tuner device)
Hereinafter, the tuner device according to the first embodiment will be described with reference to the drawings. FIG. 4 is a block diagram showing the tuner device 10 according to the first embodiment.

  As shown in FIG. 4, the tuner device 10 includes an antenna 11, a reception processing unit 12, and a terminal I / F 13.

  The antenna 11 receives radio waves of non-scrambled broadcast data and digital broadcast data on which scrambled broadcast data is superimposed.

  The reception processing unit 12 acquires non-scrambled broadcast data and scrambled broadcast data based on the radio wave received by the antenna 11. The reception processing unit 12 acquires digital broadcast data (non-scrambled broadcast data and scrambled broadcast data) corresponding to one channel selected by the user.

  Specifically, the reception processing unit 12 performs demodulation processing and decoding processing. Specifically, the reception processing unit 12 performs synchronous detection processing, guard interval removal processing, DFT (Discrete Fourier Transform) processing, despreading processing, parallel serial conversion processing, and the like.

  The terminal I / F 13 is an interface for connecting to the terminal device 20. The terminal I / F 13 is, for example, a USB port. For example, the terminal I / F 13 outputs the digital broadcast data subjected to reception processing by the reception processing unit 12 to the terminal device 20.

(Configuration of terminal device)
The terminal device according to the first embodiment will be described below with reference to the drawings. FIG. 5 is a block diagram showing the terminal device 20 according to the first embodiment.

  As illustrated in FIG. 5, the terminal device 20 includes a first I / F 21, a separation unit 22, a storage unit 23, a reproduction unit 24, a mixing unit 25, a second I / F 26, a control unit 27, and a switch. And a group (SW1 to SW4).

  The first I / F 21 is an interface for connecting the tuner device 10. The first I / F 21 is, for example, a USB port. For example, the first I / F 21 acquires digital broadcast data in which non-scrambled broadcast data and scrambled broadcast data are superimposed from the tuner device 10.

  The separation unit 22 separates non-scrambled broadcast data and scrambled broadcast data based on the digital broadcast data acquired by the reception processing unit 12. The unscrambled broadcast data separated by the separation unit 22 is output to the first storage unit 23a when SW1 is ON. The scrambled broadcast data separated by the separation unit 22 is output to the second storage unit 23b when SW2 is ON.

  The storage unit 23 is a storage such as an HDD that stores data. Specifically, the storage unit 23 includes a first storage unit 23a and a second storage unit 23b. The first storage unit 23a stores non-scrambled broadcast data when SW1 is ON. The second storage unit 23b stores scrambled broadcast data when SW2 is ON. The second storage unit 23b stores the scrambled broadcast data in a state where the scramble is not released.

  The reproduction unit 24 performs data reproduction processing. The playback unit 24 includes, for example, a display unit that displays video and data, a speaker that outputs audio, and the like. The playback unit 24 can play back unscrambled broadcast data and scrambled broadcast data.

  As described above, the scrambled broadcast data is scrambled. Therefore, it should be noted that in order to reproduce the scrambled broadcast data, it is necessary to release the scramble applied to the scrambled broadcast data. The scramble applied to the scrambled broadcast data is released by the descrambling device 30.

  The mixing unit 25 mixes non-scrambled broadcast data and scrambled broadcast data. The mixing unit 25 outputs the unscrambled broadcast data and the scrambled broadcast data to the second I / F 26.

  The mixing unit 25 acquires non-scrambled broadcast data and scrambled broadcast data from the storage unit 23 when the pair of SW3 is connected to the A side. On the other hand, the mixing unit 25 acquires non-scrambled broadcast data and scrambled broadcast data from the separating unit 22 when the pair of SW3 is connected to the B side.

  The second I / F 26 is an interface for connecting the descrambling device 30. The second I / F 26 is, for example, a USB port. For example, the second I / F 26 outputs the unscrambled unscrambled broadcast data and the scrambled scrambled broadcast data to the descrambling device 30. The second I / F 26 acquires the scrambled broadcast data from which descrambling has been canceled from the descrambling device 30.

  The control unit 27 includes a determination unit 27a, a request unit 27b, and a switching unit 27c.

  The determination unit 27a determines whether or not the descrambling device 30 can be used. Specifically, the determination unit 27 a determines whether or not the descrambling device 30 is connected via the second I / F 26. The determination unit 27a may determine whether or not the descrambling device 30 is powered on. The determination unit 27a may determine whether or not the descrambling device 30 operates normally. The determination unit 27 a may determine whether or not the CA module 34 is attached to the descrambling device 30.

  The requesting unit 27b requests the descrambling device 30 to release the scramble applied to the scrambled broadcast data. In addition, the request unit 27b requests the descrambling device 30 to output the scrambled broadcast data whose descrambling has been canceled to the terminal device 20.

  Specifically, the request unit 27b acquires information indicating whether or not the descrambling device 30 can be used from the determination unit 27a. When the descrambling device 30 can be used, the request unit 27 b requests the descrambling device 30 to release the scramble and output to the terminal device 20.

  The switching unit 27c controls switching of SW1 to SW4. Specifically, as illustrated in FIG. 6, the switching unit 27 c controls switching of SW <b> 1 to SW <b> 4 according to the mode, availability, and data type.

  The mode is a recording mode, a viewing mode, or a viewing / recording mode. The availability is information indicating whether or not the descrambling device 30 can be used. The data type is scrambled broadcast data or non-scrambled broadcast data. The availability of correspondence is information indicating whether or not the mode can be supported.

(1) Recording mode In the recording mode, the availability is not questioned. The switching unit 27c turns on SW2 for the scrambled broadcast data. The switching unit 27c turns on SW1 for non-scrambled broadcast data.

(2) Viewing mode and unusable The switching unit 27c connects a pair of SW3 to the B side and SW4 to the A side for non-scrambled broadcast data. Thus, the unscrambled broadcast data separated by the separation unit 22 is output to the reproduction unit 24. Note that scrambled broadcast data cannot be handled.

(3) Viewing / Recording Mode and Unusable Switching Unit 27c connects a pair of SW3 to the A side and SW4 to the A side for non-scrambled broadcast data. As a result, the unscrambled broadcast data stored in the first storage unit 23 a is output to the playback unit 24. Note that scrambled broadcast data cannot be handled.

(4) Viewing Mode and Usable For the scrambled broadcast data, the switching unit 27c connects a pair of SW3 to the B side and connects SW4 to the B side. As a result, the scrambled broadcast data separated by the separation unit 22 is output to the descrambling device 30. The scrambled broadcast data that has been descrambled by the descrambling device 30 is output to the playback unit 24.

  For the non-scrambled broadcast data, the switching unit 27c connects a pair of SW3 to the B side and connects SW4 to the A side. Thus, the unscrambled broadcast data separated by the separation unit 22 is output to the reproduction unit 24.

(5) Viewing / Recording Mode and Usable For the scrambled broadcast data, the switching unit 27c connects a pair of SW3 to the A side and connects SW4 to the B side. As a result, the scrambled broadcast data stored in the second storage unit 23 b is output to the descrambling device 30. The scrambled broadcast data that has been descrambled by the descrambling device 30 is output to the playback unit 24.

  For the non-scrambled broadcast data, the switching unit 27c connects a pair of SW3 to the A side and connects SW4 to the A side. As a result, the unscrambled broadcast data stored in the first storage unit 23 a is output to the playback unit 24.

(Configuration of descrambling device)
The descrambling apparatus according to the first embodiment will be described below with reference to the drawings. FIG. 7 is a block diagram showing the descrambling device 30 according to the first embodiment.

  As illustrated in FIG. 7, the descrambling device 30 includes a terminal I / F 31, an ECM separation unit 32, a channel information analysis unit 33, a CA module 34, and a descrambling unit 35.

  The terminal I / F 31 is an interface for connecting to the terminal device 20. The terminal I / F 31 is, for example, a USB port. For example, the terminal I / F 31 acquires the scrambled scrambled broadcast data from the terminal device 20. The terminal I / F 31 outputs the scrambled broadcast data whose descrambling has been canceled to the terminal device 20.

  The ECM separation unit 32 refers to the PID included in the packet and separates the packet including PSI and SI. The ECM separation unit 32 outputs a packet including PSI and SI to the channel information analysis unit 33. The ECM separation unit 32 outputs other packets excluding PSI and SI to the descrambling unit 35.

  The channel information analysis unit 33 analyzes a packet including PSI and SI. First, the channel information analysis unit 33 extracts a PAT (Program Association Table) from a packet including PSI. Subsequently, the channel information analysis unit 33 extracts a PID that identifies a packet including a PMT (Program Map Table) of digital broadcast data corresponding to one channel selected by the user based on the PAT.

  The PAT describes a PID for identifying a packet including a PMT of digital broadcast data corresponding to each channel. In the PMT, a PID for identifying a packet including each data (ECM, video information, audio information, data information) constituting digital broadcast data is described.

  Second, the channel information analysis unit 33 extracts a PMT (Program Map Table) from the packet including the SI. Subsequently, the channel information analysis unit 33 extracts a PID for identifying a packet including each data (ECM, video information, audio information, data information) constituting the digital broadcast data based on the PMT. The channel information analysis unit 33 notifies the CA module 34 of a PID for identifying a packet including each data.

  The CA module 34 stores a scramble key used for descrambling. The CA module 34 outputs a scramble key used for descrambling to the descramble unit 35. Specifically, the CA module 34 outputs a scramble key corresponding to the PID acquired from the channel information analysis unit 33 to the descrambling unit 35.

  The CA module 34 may be built in the descrambling device 30 or may be configured to be detachable from the descrambling device 30. For example, the CA module 34 is a BCAS (BS Conditional Access System) card or the like.

  The descrambling unit 35 uses the scramble key to release the scramble applied to the digital broadcast data. Specifically, the descrambling unit 35 uses the scramble key acquired from the CA module 34 to release the scramble applied to the packet including the video information. Similarly, the descrambling unit 35 uses the scramble key acquired from the CA module 34 to release the scramble applied to the packet including the voice information and the packet including the data information. The descrambling unit 35 outputs the descrambled packet to the terminal I / F 31.

(Operation of terminal equipment)
Hereinafter, the operation of the terminal device according to the first embodiment will be described with reference to the drawings. 8 to 10 are flowcharts showing the operation of the terminal device 20 according to the first embodiment.

  First, a case in which it is not considered whether or not the descrambling device 30 can be used will be described with reference to FIG.

  As shown in FIG. 8, in step 10, the terminal device 20 receives digital broadcast data on which non-scrambled broadcast data and scrambled broadcast data are superimposed by the tuner device 10.

  In step 11, the terminal device 20 separates non-scrambled broadcast data and scrambled broadcast data based on the digital broadcast data.

  In step 12, the terminal device 20 stores the scrambled broadcast data in the storage unit 23 (second storage unit 23b) without releasing the scramble applied to the scrambled broadcast data. The terminal device 20 may store non-scrambled broadcast data in the storage unit 23 (first storage unit 23a).

  In step 13, the terminal device 20 performs reproduction processing of non-scrambled broadcast data.

  Of course, the order of step 12 and step 13 may be interchanged.

  Secondly, a case that considers whether or not the descrambling device 30 can be used will be described with reference to FIG.

  As shown in FIG. 9, in step 20, the terminal device 20 receives digital broadcast data on which non-scrambled broadcast data and scrambled broadcast data are superimposed by the tuner device 10.

  In step 21, the terminal device 20 separates non-scrambled broadcast data and scrambled broadcast data based on the digital broadcast data.

  In step 22, the terminal device 20 determines whether or not the descrambling device 30 can be used. If the descrambling device 30 can be used, the terminal device 20 proceeds to the process of step 23. When the descrambling device 30 cannot be used, the terminal device 20 proceeds to the process of step 26.

  In step 23, the terminal device 20 requests the descrambling device 30 to release the scramble applied to the scrambled broadcast data. Further, the terminal device 20 requests the descrambling device 30 to output the scrambled broadcast data whose descrambling has been canceled to the terminal device 20.

  In step 24, the terminal device 20 stores the scrambled broadcast data that has been unscrambled in the storage unit 23 (second storage unit 23b). The terminal device 20 may store non-scrambled broadcast data in the storage unit 23 (first storage unit 23a).

  In step 25, the terminal device 20 performs a reproduction process of the scrambled broadcast data that has been unscrambled. Note that the terminal device 20 may perform playback processing of non-scrambled broadcast data.

  In step 26, the terminal device 20 stores the scrambled broadcast data in the storage unit 23 (second storage unit 23b) without releasing the scramble applied to the scrambled broadcast data. The terminal device 20 may store non-scrambled broadcast data in the storage unit 23 (first storage unit 23a).

  In step 27, the terminal device 20 performs a reproduction process of non-scrambled broadcast data.

  Of course, the order of step 24 and step 25 may be interchanged. Similarly, it goes without saying that the order of step 26 and step 27 may be changed.

  Third, a case where scrambled broadcast data that has not been unscrambled is stored in the storage unit 23 (second storage unit 23b) will be described with reference to FIG. Note that the flow shown in FIG. 10 is a process executed by an instruction from the user or in a predetermined cycle.

  As illustrated in FIG. 10, in step 30, the terminal device 20 determines whether or not the descrambling device 30 can be used. If the descrambling device 30 can be used, the terminal device 20 proceeds to the process of step 31. If the descrambling device 30 cannot be used, the terminal device 20 ends the series of processes.

  In step 31, the terminal device 20 reads the scrambled scrambled broadcast data from the storage unit 23 (second storage unit 23b).

  In step 32, the terminal device 20 requests the descrambling device 30 to release the scramble applied to the scrambled broadcast data. Further, the terminal device 20 requests the descrambling device 30 to output the scrambled broadcast data whose descrambling has been canceled to the terminal device 20.

  In step 33, the terminal device 20 stores the scrambled broadcast data descrambled by the descrambling device 30 in the storage unit 23 (second storage unit 23b).

(Function and effect)
In the first embodiment, the separation unit 22 outputs unscrambled broadcast data that has not been scrambled to the reproduction unit 24. On the other hand, the separation unit outputs the scrambled broadcast data subjected to the scramble to the storage unit 23. That is, the scrambled broadcast data is stored in the storage unit 23 in order to release the scramble later even in an environment where the scramble applied to the scrambled broadcast data cannot be released.

  Thus, the user can immediately view non-scrambled broadcast such as one-segment broadcast, and can view later scrambled broadcast such as full-segment broadcast. In this way, it is possible to achieve both viewing of the unscrambled broadcast and viewing of the scrambled broadcast.

  In the first embodiment, when the descrambling device 30 can be used, the separation unit 22 outputs the scrambled scrambled broadcast data to the descrambling device 30. That is, in an environment where scramble applied to the scrambled broadcast data can be canceled, the user can immediately view the full segment broadcast.

  In the first embodiment, when the descrambling device 30 can be used, the request unit 27b requests the descrambling device 30 to release the scramble applied to the scrambled broadcast data. That is, when an environment in which the scramble can be canceled is reached, the scramble applied to the scrambled broadcast data stored in the storage unit 23 for the purpose of viewing later is released. Thereby, when the user wants to watch, even in an environment where the scramble cannot be released, the user can watch the full segment broadcast.

[Other Embodiments]
Although the present invention has been described with reference to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, a program for causing a computer to execute the operation of the terminal device 20 (that is, the flows shown in FIGS. 8 to 10) may be provided. A storage medium storing such a program may be provided. The storage medium storing the program is, for example, a CD-ROM attached to the descrambling device 30.

  Of course, the scrambled broadcast data may include caption information in addition to video information, audio information, and data information.

  In the above-described embodiment, the digital broadcast data including the unscrambled broadcast data and the scrambled broadcast data is illustrated. However, digital broadcast data is not limited to this.

  Although not particularly mentioned in the above-described embodiment, communication data between the tuner device 10 and the terminal device 20 may be encrypted. Similarly, communication data between the terminal device 20 and the descrambling device 30 may be encrypted.

  In the above-described embodiment, the descrambling device 30 is configured to be detachable from the terminal device 20, but the embodiment is not limited to this. The terminal device 20 may incorporate a descrambling device 30.

1 is a diagram illustrating a receiving system 100 according to a first embodiment. It is a figure for demonstrating the digital broadcast data which concern on 1st Embodiment. It is a figure for demonstrating the digital broadcast data which concern on 1st Embodiment. 1 is a block diagram showing a tuner device 10 according to a first embodiment. It is a block diagram which shows the terminal device 20 which concerns on 1st Embodiment. It is a figure which shows the example of switching of SW group which concerns on 1st Embodiment. 1 is a block diagram showing a descrambling device 30 according to a first embodiment. It is a flowchart which shows operation | movement of the terminal device 20 which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the terminal device 20 which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the terminal device 20 which concerns on 1st Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Tuner apparatus, 11 ... Antenna, 12 ... Reception processing part, 13 ... Terminal I / F, 20 ... Terminal device, 21 ... 1st I / F, 22 ... Separation unit, 23 ... storage unit, 24 ... reproduction unit, 25 ... mixing unit, 26 ... second I / F, 27 ... control unit 30 ... descrambling device, 31 ... Terminal I / F, 32 ... ECM separation unit, 33 ... Channel information analysis unit, 34 ... CA module, 35 ... Descramble unit, 100 ... Reception system

Claims (5)

A receiving system for receiving digital broadcast data in which unscrambled unscrambled broadcast data and scrambled scrambled broadcast data are superimposed,
A separation unit that separates the non-scrambled broadcast data and the scrambled broadcast data based on the digital broadcast data;
A playback unit for performing data playback processing;
A storage unit for storing data,
The receiving system, wherein the separation unit outputs the non-scrambled broadcast data to the reproduction unit, and outputs the scrambled broadcast data to the storage unit. A determination unit for determining whether it is possible to use a descrambling unit for releasing the scramble applied to the scrambled broadcast data;
2. The reception according to claim 1, wherein, when the descrambling unit can be used, the separation unit outputs the scrambled broadcast data to the descrambling unit instead of the storage unit. system. A determination unit that determines whether or not it is possible to use a descrambling unit that cancels scrambling applied to the scrambled broadcast data;
And a request unit that requests the descrambling unit to release the scramble applied to the scrambled broadcast data stored in the storage unit when the descrambling unit can be used. The receiving system according to claim 1. A receiving method for receiving digital broadcast data in which unscrambled unscrambled broadcast data and scrambled scrambled broadcast data are superimposed,
Separating the non-scrambled broadcast data and the scrambled broadcast data based on the digital broadcast data;
Performing a reproduction process of the non-scrambled broadcast data;
And a step of storing said scrambled broadcast data. A receiving program for receiving digital broadcast data in which non-scrambled unscrambled broadcast data and scrambled scrambled broadcast data are superimposed,
Separating the non-scrambled broadcast data and the scrambled broadcast data based on the digital broadcast data;
Performing a reproduction process of the non-scrambled broadcast data;
And a step of executing a storing process of the scrambled broadcast data.

Images