JP2012049731A - Digital broadcast reception apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast reception apparatus that prevents a failure to update a program.SOLUTION: A TV receiver stores an updatable program. For updating the program, the TV receiver first transitions to a standby state (S1), and then uses a tuner section for searching through each channel to check whether or not there is OAD data in a TS and for acquiring network change notification information from an NIT in the TS (S3). If there is OAD data in the TS (YES in S4), the TV receiver determines whether or not there will be a network change during the process of updating the program (S5). If the determination finds that there will be such a network change (YES in S6), the process of updating the program is canceled. If it is determined that there will be no network change during the process of updating the program (NO in S6), on the other hand, the program is updated with the OAD data (S7).

Description

  The present invention relates to a digital broadcast receiver capable of receiving a digital broadcast signal distributed from a broadcast station.

  In recent years, television (hereinafter referred to as TV) receivers having an OAD (Over Air Download) function are known (see, for example, Patent Documents 1 to 4). When this type of TV receiver is in a standby state, an image is displayed on the display at a predetermined time (for example, 1 hour after the transition to the standby state or 4:00 am in the standby state). Each channel is searched in the background without displaying it, and it is confirmed whether or not data for OAD is included in a transport stream (hereinafter referred to as TS) of a digital broadcast signal distributed from a broadcasting station. If the TS contains OAD data, the OAD data is acquired, and the update processing of the own (control) program is performed using this data.

  By the way, in recent years, for example, in European digital television broadcasting, so-called network changes such as Multiplex (multiplexing of broadcast signals) and service changes may be performed. The broadcasting station distributes TS including network change notification information for notifying network change in advance. The network change notification information includes information such as a network change start time and a migration work time.

  By the way, in the conventional TV receiver, the program update process is continued even if there is a network change during the execution of the program update process using the OAD data. In some cases, the writing process (update process) to a non-volatile memory such as a flash memory in which is stored is not performed correctly. As a result, the program update process fails in the middle, and the conventional TV receiver may not be activated again.

JP 2009-253732 A JP 2009-267849 A JP 2009-177686 A JP 2009-177631 A

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a digital broadcast receiving apparatus that can prevent a program update process from failing.

  In order to achieve the above object, a first aspect of the present invention provides a program storage means for storing a program, a receiving means for receiving a digital broadcast signal distributed from a broadcasting station, and a digital broadcast signal received by the receiving means. Network change notification information extracting means for extracting network change notification information for notifying a network change from a network information table (NIT) of the transport stream, and transcoding of the digital broadcast signal received by the receiving means. Digital broadcast reception comprising: a program update processing means for obtaining a rewrite program included in a port stream and performing a series of update processes for rewriting the program stored in the program storage means; and a control means for controlling each part of the apparatus In the apparatus, the pro When the program update processing is performed by the program update processing means, the program update processing means executes the program based on the contents of the network change notification information extracted by the network change notification information extraction means. A network change presence / absence judging means for judging whether or not a network change is performed during the update process; and the control means uses the network update presence / absence judgment means to execute a program update by the program update processing means. The program update processing by the program update processing means is not performed when it is determined that the network is changed during the update processing.

  According to the present invention, when the network is changed during the program update process, the program update process is not performed. Thereby, it is possible to easily prevent the program update process from failing due to a network change during the program update process.

The perspective view of TV receiver in one Embodiment of this invention. The block diagram which shows schematic structure of the said TV receiver. The flowchart which shows the procedure of the program update process in the said TV receiver.

  A television receiver (digital broadcast receiving apparatus in claims) according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an appearance of a television (hereinafter referred to as TV) receiver 1 operated by a remote controller 2, and FIG. 2 shows an internal configuration of the TV receiver 1. The TV receiver 1 is a device that receives and decodes an encoded TV program and displays it. The TV receiver 1 has an OAD (Over Air Download) function, and performs a program update process based on the received OAD data (rewrite program). The remote controller 2 is operated by a user to give various operation instructions to the TV receiver 1.

  As shown in FIG. 2, the TV receiver 1 includes a tuner unit (reception unit) 11 that receives a digital broadcast signal distributed from a broadcasting station, and a TV program video based on the digital broadcast signal received by the tuner unit 11. Display 12 and a speaker 13 for outputting the sound of the TV program. The TV receiver 1 includes a remote control signal receiving unit 14 for receiving an operation signal transmitted from a remote controller 2 having a plurality of operation buttons for performing various instructions, and a memory (program storage) storing various information. Means) 15 and a control microcomputer (control means) 10 for controlling each part of the TV receiver 1.

  The tuner unit 11 includes a decoder 11a that decodes a digital broadcast signal of a TV program encoded by, for example, the MPEG-2 method, and transports a digital broadcast signal (hereinafter referred to as TS) distributed from a broadcasting station. The network information table (NIT) included in the data is received and output to the control microcomputer 10. The tuner unit 11 outputs OAD data included in the TS to the control microcomputer 10. The decoder 11a decodes the program stream included in the TS into a video signal and an audio signal.

  The NIT is information based on the SI (Service Information) standard, and includes a descriptor that notifies a network change of “network_change_notify_descriptor”. This descriptor includes “Start_time_of_change” indicating the network change start time, “Change_duration” indicating the network migration work period, and “Change_type” indicating the network change type.

  The memory 15 is a rewritable storage medium such as a flash memory, and stores a (control) program 15a for operating the control microcomputer 10, network change notification information 15b, and a reception time 15c. Yes. The program 15a is composed of, for example, a plurality of modules, and it is possible to update functions such as addition and correction by rewriting each module.

  The network change notification information 15b stores information such as a network change start time and a migration work period based on the contents of “network_change_notify_descriptor” stored in the NIT. The reception time 15c is information indicating a time (timing) for checking whether or not there is data for OAD in the TS when the TV receiver 1 is operating in the standby state. Specifically, for example, time information such as “after 1 hour has passed since the transition to the standby state” is stored.

  The control microcomputer 10 includes a video output unit 10a, an audio output unit 10b, a program update processing unit (program update processing unit) 10c, a network change notification information extraction unit (network change notification information extraction unit) 10d, A network change presence / absence determination unit (network change presence / absence determination means) 10e, and operates in a standby state in which power is not supplied to the display 12 and the speaker 13 or in a normal state in which normal operation is performed. The user can switch between the standby state and the normal state by operating a button on the remote controller 2. Further, the control microcomputer 10 performs a program update process using the OAD data received from the tuner unit 11.

  The video output unit 10 a outputs the video of the TV program received by the tuner unit 11 to the display 12. The audio output unit 10 b outputs the audio of the TV program received by the tuner unit 11 to the speaker 13.

  The program update processing unit 10c acquires a data for OAD included in the TS from the tuner unit 11, and performs a series of program update processing for rewriting (updating) the program 15a stored in the memory 15. .

  The network change notification information extraction unit 10 d extracts the network change notification information 15 b based on the contents of “network_change_notify_descriptor” from the NIT of the TS of the digital broadcast signal received by the tuner unit 11, and stores it in the memory 15. Remember.

  The network change presence / absence determination unit 10e changes the network during the program update process based on the content of the network change notification information 15b when the program update process is performed by the program update process unit 10c. It is determined whether or not.

  Next, update processing of the program 15a in the TV receiver 1 will be described with reference to the flowchart shown in FIG. First, the control microcomputer 10 shifts to the standby state by the operation of the remote controller 2 by the user (S1), and then reaches the time stored in the reception time 15c in the memory 15 (YES in S2), the tuner. By checking each channel using the unit 11, it is confirmed whether or not there is data for OAD in the TS, and network change notification information is acquired from the NIT of the TS (S3). .

  If the TS has OAD data in S3 (YES in S4), the control microcomputer 10 uses the network change presence / absence determination unit 10e to update the network during the update process of the program 15a. It is determined whether or not the bookmark is changed (S5). Specifically, for example, when the update process of the program 15a starts at AM 4:00 and the time required for the update process of the program 15a is one hour, the update process of the program 15a ends at AM 5:00. That is, the update process of the program 15a is performed at AM 4:00 to AM 5:00. At this time, if the content of the network change notification information 15b is “network change start time is AM 4:30 and the network migration work period is 1 hour”, the presence / absence of network change is determined. The unit 10e determines that the network is changed during the update process of the program 15a. Note that the time required for the update process of the program 15a is set as a fixed time in advance. Here, the time is assumed to be 1 hour, but the time is not limited to this, and may be any time. . Further, the time required for the update process of the program 15a may be calculated according to the data size of the OAD data.

  As a result of the determination in S5, when it is determined that the network is changed during the update process of the program 15a (YES in S6), the control microcomputer 10 does not perform the update process of the program 15a. On the other hand, when it is determined that the network is not changed during the update process of the program 15a (NO in S6), the control microcomputer 10 uses the program update processing unit 10c to program the OAD data. The update process 15a is performed (S7).

  On the other hand, if the TS has no data for OAD (is not included) in S3 (NO in S4), the control microcomputer 10 does not perform the processes after S5.

  As described above, in the TV receiver 1 according to the present embodiment, when it is determined that the network is changed during the update process of the program 15a, the update process of the program 15a is not performed. Thereby, it is possible to easily prevent the update process of the program 15a from failing due to the network being changed during the update process of the program 15a.

  Further, the TV receiver 1 uses the network change notification information 15b based on the content of the “network_change_notify_descriptor” descriptor based on the SI standard to determine whether or not the network is changed during the update process of the program 15a. Therefore, it is not necessary to mount a dedicated interface circuit corresponding to the original protocol. Therefore, the manufacturing cost of the TV receiver 1 can be suppressed.

  In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, in the above embodiment, the digital broadcast receiving apparatus of the present invention is a TV receiver. However, the present invention is not limited to this. For example, a hard disk recorder having an OAD function may be used.

1 TV receiver (digital broadcast receiver)
10 Microcomputer for control (control means)
11 Tuner (Receiving means)
15 Memory (program storage means)
10c Program update processing unit (program update processing means)
10d Network change notification information extraction unit (network change notification information extraction means)
10e Network change presence / absence determination unit (network change presence / absence determination means)

Claims (1)

Program storage means for storing a program;
Receiving means for receiving a digital broadcast signal distributed from a broadcasting station;
Network change notification information extracting means for extracting network change notification information for notifying a network change from a network information table (NIT) of a transport stream of a digital broadcast signal received by the receiving means;
Program update processing means for acquiring a rewriting program included in a transport stream of a digital broadcast signal received by the receiving means and performing a series of update processing for rewriting the program stored in the program storage means;
In a digital broadcast receiving device comprising control means for controlling each part of the device,
When the program update processing is performed by the program update processing means, the program by the program update processing means is based on the contents of the network change notification information extracted by the network change notification information extraction means. Network change presence / absence judging means for judging whether or not a network change is performed during the update process of
When the network change presence / absence determining means determines that a network change is to be performed during the program update process by the program update processing means, the control means determines whether the program update processing means A digital broadcast receiver characterized by not performing update processing.

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