JP2008148231A - Broadcast receiver and download content acquiring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve acquiring performance of a download content. <P>SOLUTION: A demodulation unit 12 performs demodulation processing on a reception signal obtained by a tuner unit 11, and multiplexed information is extracted from a resultant transport stream by a demultiplexer 13. On the basis of download notice information extracted by the demultiplexer 13, a control unit 30 discriminates a download content transmission term and if the transmission term comes during broadcast receiving operation, the download content is extracted by switching a tuning frequency of the tuner unit 11 to a frequency of digital broadcast containing the download content. Since the download content can be acquired even while the broadcast receiver is used for exhibition or the like, the exhibition or the like can be prevented from being continuously performed in a state having trouble or in a state where a new function can not be utilized. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a broadcast receiving apparatus and a download content acquisition method. Specifically, based on the download notification information extracted from the data stream obtained by receiving the broadcast, the transmission period of the download content is determined, and when the transmission period is reached during the broadcast reception operation, the channel selection frequency is selected by the download content. The downloaded content is acquired by switching to the selected broadcast frequency.

  In digital broadcasting, not only services that provide content data of broadcast programs, but also services that provide download content. This download content includes software updates and additions used for each broadcast receiving device that receives digital broadcasts, and data that is commonly used by each broadcast receiving device (for example, broadcasters displayed in an electronic program guide) The logo mark, the program genre code, etc.) are updated, etc., and are periodically and repeatedly transmitted at predetermined time intervals and predetermined time intervals.

  When such a download content is used, in a broadcast receiving apparatus provided with only one tuner unit for receiving broadcasts, as described in Patent Document 1, when the user does not use the broadcast receiving apparatus As disclosed in Patent Document 2, when the broadcast receiving apparatus is in a power-off state, a process for acquiring download content is performed.

JP 2002-196943 A JP 2006-54522 A

  By the way, when the user is not using the broadcast receiving device, or when the broadcast receiving device acquires download contents when the broadcast receiving device is in a power-off state, for example, when used for a demonstration operation or the like at a store In addition, the download content may not be acquired. In other words, in stores that sell broadcast receivers, there are cases where a broadcast program is always being watched as a demonstration operation during the operation, and if the broadcast program is always watched, download content is acquired during the business. Can not do it. In addition, if the supply of power to the broadcast receiving device is stopped after the end of business in order to reduce the power consumption, it is also impossible to acquire the download content after the end of business.

  If download content cannot be acquired in this way, for example, even if a problem occurs in the software of the broadcast receiving apparatus, the problem cannot be solved by upgrading the software. Therefore, the broadcast receiving apparatus will be exhibited in a state where there is a defect even though software in which the problem is solved is provided. Also, when a new function becomes available by upgrading the software, the broadcast receiving apparatus will be exhibited in a state where the new function cannot be used. For this reason, there is a risk that the dealer may be disadvantaged or the user's evaluation of the broadcast receiving apparatus may be reduced.

  In view of this, the present invention provides a broadcast receiving apparatus and a download content acquisition method with improved download content acquisition.

  The concept of the present invention is that a tuner for selecting a digital broadcast and outputting a received signal, a demodulator for demodulating the received signal and outputting a data stream, and extracting multiplexed information from the data stream An extraction unit; a user interface unit that generates an operation signal in accordance with a user operation; and a control unit that controls the tuner unit and the extraction unit in accordance with the operation signal. The control unit is a download notification extracted by the extraction unit. Based on the information, the transmission period of the download content is determined, and when the transmission period is reached during the broadcast reception operation, the tuning frequency of the tuner unit is switched to the frequency of the digital broadcast including the download content, and the download unit downloads it. It is in a broadcast receiving apparatus that extracts content. Also, a receiving step for selecting a digital broadcast channel to obtain a received signal, a demodulating step for demodulating the received signal obtained in the receiving step to obtain a data stream, and multiplexing from the data stream obtained in the demodulating step The extraction step for extracting the information that has been extracted, and the download content transmission period is determined based on the download notification information extracted in the extraction step. Is a download content acquisition method having a control step of extracting download content by switching to a digital broadcast frequency including

  In this invention, a control part discriminate | determines the transmission period of download content based on the extracted download notification information, and performs the notification of switching of a tuning frequency before the period set beforehand from this transmission period. Here, if an operation signal indicating suspension of channel selection frequency switching is not supplied during the period from the notification to the transmission period, the control unit selects the tuner unit during the broadcast reception operation when the transmission period is reached. The station frequency is switched to the frequency of digital broadcasting including the download content, and the download content is extracted by the extraction unit. Further, the extracted download content is stored in the memory unit. When an operation signal indicating switching operation of the tuning frequency of the tuner unit is supplied during extraction of download content, the extraction of download content is stopped and the tuning frequency of the tuner unit is switched. Thereafter, during the download content transmission period, when an operation signal indicating a switching operation using the tuning frequency of the tuner unit as the frequency of the digital broadcast including the download content is supplied, the download content is selected from the tuning frequency of the tuner unit. Switching to the included digital broadcast frequency restarts the download content extraction. When the download content stored in the memory unit is not completed, the lacking information in the download content is extracted in the subsequent transmission period. In addition, if the tuning frequency switching operation is not performed during the download content extraction, the frequency before the tuning frequency of the tuner unit switches to the frequency of the digital broadcast including the download content when the transmission period ends. Returned to

  According to the present invention, when the download content transmission period is determined based on the download notification information extracted from the data stream obtained by receiving the broadcast and the transmission period is reached during the broadcast reception operation, the selection is made. The download content is acquired by switching the station frequency to the broadcast channel selection frequency including the download content.

  For this reason, the download content can be acquired more easily, and even if the broadcast receiving device is used for exhibitions, etc., it is possible to acquire the download content. It is possible to prevent the exhibition from being performed continuously.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a broadcast receiving apparatus.

  A broadcast signal SRF obtained by receiving a digital broadcast with an antenna (not shown) is supplied to the tuner unit 11 of the broadcast receiving apparatus 10. The tuner unit 11 selects a channel having a channel selection frequency indicated by a control signal CT supplied from the control unit 30 described later from the broadcast signal SRF. In addition, the reception signal Stu obtained by performing channel selection is supplied to the demodulation unit 12.

  The demodulation unit 12 performs digital demodulation processing, error correction processing, deinterleaving processing, descrambling processing, and the like on the received signal Stu, and supplies the obtained data stream TS to the demultiplexer 13 that is an extraction unit.

  The demultiplexer 13 extracts a packet of video data and audio data of a target organization channel from a data stream, for example, a transport stream TS used in the MPEG (Moving Picture Experts Group) -2 system format, and converts the packet into a packet. The included video data DEv and audio data DEa are supplied to the decoder 14. Further, a packet CP of section information such as data broadcast, program specific information (PSI) and program arrangement information (SI: Service Information) is extracted from the transport stream TS and supplied to the control unit 30. The extraction of the packet CP is performed using PID (Packet Identification) provided in the packet header as will be described later.

  The decoder 14 decodes the video data DEv and supplies the decoded video data Dv to the video presentation processing unit 15. The decoder 14 decodes the audio data DEa and supplies the decoded audio data Da to the audio output processing unit 17.

  The video presentation processing unit 15 generates a display drive signal HR based on the video data Dv and supplies it to the display device 16. The video presentation processing unit 15 also displays not only the video data Dv but also a still image plane signal for displaying a still image, a character / graphic plane signal for displaying characters and graphics, and a caption for displaying captions. By switching and mixing the plane signals and the like to generate the display drive signal HR, not only the broadcast content video but also various information can be displayed.

  The display device 16 drives the display device based on the display drive signal HR, thereby displaying a program video, a still image, a caption, a message, and the like on the screen of the display device. It should be noted that the signals of the still image plane, the character graphic plane, and the subtitle plane may be supplied from the control unit 30 as the control signal CT, and are generated by the video presentation processing unit 15 based on the control signal CT from the control unit 30. It is good also as what to do.

  The audio output processing unit 17 converts the audio data Da supplied from the decoder 14 into an analog audio signal Sa, and then supplies it to the speaker 18 as a desired signal level to perform audio output.

  The tuner unit 11, the demodulation unit 12, the demultiplexer 13, the decoder 14, the video presentation processing unit 15, and the audio output processing unit 17 are connected to the control unit 30 via the bus 20.

  A user interface unit 31, a clock unit 32, and a memory unit 33 are connected to the control unit 30. The user interface unit 31 includes a remote control signal receiving unit for receiving a remote control signal transmitted from an operation key or a remote control device (not shown). The user interface unit 31 generates an operation signal PS corresponding to a key operation of an operation key provided in the user interface unit 31 and supplies the operation signal PS to the control unit 30. Alternatively, a remote control signal transmitted in response to a key operation of an operation key provided in the remote control device is received, and an operation signal PS based on the received remote control signal is generated and supplied to the control unit 30. . The clock unit 32 generates time information indicating the current time, and supplies the generated time information TM to the control unit 30.

  The memory unit 33 includes a nonvolatile memory unit 33a and a volatile memory unit 33b. The non-volatile memory unit 33a is configured using an EEPROM (Electronically Erasable and Programmable Read Only Memory) or the like, and performs various operations with the various software for operating the broadcast receiving device 10 or the broadcast receiving device 10. For example, data indicating the setting state of the broadcast receiving apparatus 10 is stored. The volatile memory unit 33b is configured using a RAM (Random Access Memory), and is used as a working area when the broadcast receiving apparatus 10 performs various operations.

  The control unit 30 is composed of a microcomputer or the like, and starts supplying power to the control unit 30 or the like when power supply to the broadcast receiving device 10 is started or when the main power switch of the broadcast receiving device 10 is turned on. When this is done, various software is read from the non-volatile memory unit 33a and executed, or the control signal CT is generated using the read data, and the generated control signal CT is supplied to the respective units to transmit the generated control signal CT. Start operation. Thereafter, by generating the control signal CT based on the operation signal PS from the user interface unit 31, the operation of the broadcast receiving apparatus 10 is controlled to be an operation corresponding to the user operation. Further, when the broadcast receiving apparatus 10 is operated in response to a user operation, the control unit 30 displays, for example, program specific information (PSI: Program Specific Information) and program arrangement information (SI: Service Information) transmitted from the broadcast station side. Control using it. Furthermore, the control unit 30 also controls the operation of the broadcast receiving apparatus 10 using section information, time information TM, and the like.

  FIG. 2 shows the structure of the transport stream. As shown in FIG. 2A, the transport stream TS has a configuration in which packets having a fixed length of 188 bytes called TS packets are continuous. In this transport stream TS, not only TS packets of broadcast programs such as video and audio, but also TS packets of program identification information and program arrangement information are provided.

  A TS packet is composed of a fixed-length TS header (4 bytes) and an adaptation field or TS payload (184 bytes). As shown in FIG. 2B, an identification code area called a 13-bit PID (Packet Identifier) is provided in the TS header, and what kind of packet the TS packet is based on this PID. It can be identified. For example, when the PID is “0x0000”, it indicates that the packet is a PAT (Program Association Table). The PAT packet indicates a PID of a TS packet for transmitting a PMT related to a broadcast program or a PID indicating a DSM-CC (Digital Storage Media Command and Control) packet. When the PID is “0x0010”, it is indicated that the packet is a NIT (Network Information Table). The NIT packet indicates transmission channel information such as information on the organization channel and frequency. When the PID is “0x0023”, it is indicated that the packet is an SDTT (Software Download Trigger Table). The SDTT packet indicates download notification information for notifying the transmission of download content. The download content is used for updating / adding software, updating data commonly used in all receiving apparatuses, and the like. Is.

  The download content is provided with data amount information and error detection information (for example, checksum). By using the data amount information and error detection information, it is determined whether the download content after download is complete without error. It has been made possible. In addition, configuration information indicating what kind of software and data constitutes the download content is provided in the download content, and when the download content is not complete, it is possible to determine which software and data are not complete. It is said that.

  As described above, the program identification information and the program arrangement information TS packet provided in the transport stream TS are extracted by the demultiplexer 13, and the program identification information and the program arrangement information are stored in the nonvolatile memory unit 33a. The control unit 30 operates the broadcast receiving device 10 by using the program specifying information and the program arrangement information stored in the nonvolatile memory unit 33a.

  Note that when the operation end operation is performed, the control unit 30 stores data indicating a setting state or the like when the operation end operation is performed in the nonvolatile memory unit 33a. The data stored in is read when the operation of the broadcast receiving apparatus 10 is resumed, so that the operation is resumed in the state at the end of the operation.

  Next, the operation of the broadcast receiving apparatus will be described. In the case of a broadcast receiving operation for viewing desired broadcast content, the control unit 30 generates a control signal CT and supplies it to the tuner unit 11 so that a stream including the desired broadcast content can be obtained. That is, the control unit 30 discriminates the carrier frequency used in the broadcast of the desired broadcast content based on the information of the NIT, generates the control signal CT so as to select the discriminated carrier frequency, and generates the tuner unit. 11 is supplied.

  The tuner unit 11 performs a channel selection operation at the channel selection frequency indicated by the control signal CT, and supplies the obtained reception signal to the demodulation unit 12. The demodulator 12 performs demodulation processing on the received signal and supplies the obtained transport stream TS to the demultiplexer 13.

  The demultiplexer 13 extracts TS packets based on the control signal CT supplied from the control unit 30. Here, the control unit 30 determines the PID of the PMT related to the desired broadcast content organization channel based on the detailed information of the channel indicated by the PAT, and based on the determination result, relates to the desired broadcast content organization channel. Get PMT. In this PMT, PIDs such as video and audio sent through the organization channel are indicated. Therefore, a control signal is generated by the control unit 30 and supplied to the demultiplexer 13 so as to extract packets of this PID. To do. For this reason, the demultiplexer 13 extracts packets such as video and audio of the desired broadcast content. Therefore, by extracting the video packet and supplying the video data included in the packet to the decoder 14, the video of the desired broadcast content can be displayed on the display device 16. In addition, by extracting the audio packet and supplying the audio data included in the packet to the decoder 14, the audio of the desired broadcast content can be output from the speaker 18.

  Next, a case will be described in which software update / addition or data update commonly used in all receiving apparatuses is performed.

  The control unit 30 determines the download content acquisition timing based on the SDTT notification information extracted by the demultiplexer 13. Further, during the broadcast reception operation, when the current time indicated by the clock unit 32 comes before the download content transmission start time, the download content is automatically acquired and displayed. Furthermore, when the user operation for stopping the download content automatic acquisition operation is not performed, the control unit 30 automatically acquires the download content when the download content transmission start time is reached, and the download content acquisition is completed. Sometimes, software update / addition, update of data used in common by all receiving apparatuses, and the like are performed.

  The SDTT indicating download notification information and the DSM-CC indicating download contents are section format data. FIG. 3 shows the structure of the SDTT. The table ID is for identifying which table the data is, and the table ID is set to “0xC3” in SDTT. The manufacturer ID indicates which manufacturer's receiving device the download notification information is for. The device model ID indicates which model of the receiving device the download notification information is for. The transport stream ID indicates information for identifying a transport stream including a service channel to be downloaded. The network ID indicates the original network identification number of the transport stream including the service channel to be downloaded. The service ID indicates the identification number of the service channel to be downloaded. The start time indicates the time when transmission of the download content is started, and the duration indicates the period during which download content is transmitted. The SDTT also indicates information such as the version number of the software to be updated, the version number of the software to be downloaded, whether to perform forced download or optional download.

  The download content is transmitted according to a DSM-CC data carousel standardized as an international standard (ISO / IEC 13818-6). In the DSM-CC data carousel, data to be transmitted is managed in units of “modules”. Each module is divided into a plurality of “blocks” so as to fit in a certain size, and each block is a “DDB (Download Data Block) message”, and information indicating what number block is in which module. It is transmitted after being added. In addition, as information indicating the structure of the entire DSM-CC data carousel, the number of modules included in the DSM-CC data carousel and information about each module are transmitted as a “DII (Download Info Indication) message”. .

  4 and 5 are flowcharts showing the download content acquisition operation. In step ST1, the control unit 30 acquires SDTT information and proceeds to step ST2.

  In step ST2, the control unit 30 determines whether to acquire download content. For example, if the manufacturer ID or device model ID indicated by the SDTT information is not applicable, or if it is applicable and the software version is not the target, the update of the data commonly used by all receiving apparatuses is completed. When the download content is not necessary, as in the case of the download content, the download content acquisition operation is terminated. In addition, when the manufacturer ID or device model ID indicated by the SDTT information is applicable and the software version is also the target, the update of the data commonly used in all the receiving apparatuses is not completed. As described above, when download content is necessary, the process proceeds to step ST3.

  In step ST <b> 3, the control unit 30 performs timer setting for automatic acquisition display of download content. That is, the control unit 30 can determine the transmission start time of the required download content from the information of the SDTT, and the user can read the automatic acquisition display, for example, before a predetermined time before the transmission start time. The time about several minutes before is set as the display timing of the automatic acquisition display of the download content, and the process proceeds to step ST4.

  In step ST4, the control unit 30 determines whether or not the timer set time has come. Here, when the current time indicated by the clock unit 32 is not the time set in step ST3, the process returns to step ST4, and when it is after the time set in step ST3, the process proceeds to step ST5.

  In step ST5, the control unit 30 performs download automatic acquisition display. That is, the control unit 30 controls the operation of the video presentation processing unit 15 to display on the screen of the display device 16 that download content is automatically acquired. This display only needs to be understood so that the channel of the broadcast receiving apparatus is automatically switched to obtain the download content. If the name of the transport stream obtained after channel switching is displayed, the user can know what transport stream is automatically received before downloading. Furthermore, the control unit 30 also displays a release operation for preventing automatic download content acquisition. That is, during a display period of automatic download acquisition display, for example, when a user performs a channel switching operation to change a viewing program, automatic acquisition of download content is stopped, and a display to the effect of the user operation is performed.

  In step ST6, the control unit 30 determines whether or not an automatic acquisition cancellation operation has been performed. If no user operation is performed during the automatic download acquisition display period, the process proceeds to step ST7. If an automatic acquisition cancellation operation is performed, the process proceeds to step ST13. The automatic acquisition cancel operation is performed, for example, by displaying an operation key assigned with a function for canceling automatic acquisition in the download automatic acquisition display, and when this operation key is operated, the automatic acquisition cancel operation is performed. Process. In addition, when the channel switching operation of the composition channel is performed, the control unit 30 processes that the broadcast content after the channel switching operation is viewed by the user and that the automatic acquisition cancellation operation is performed.

  In step ST7, the control unit 30 determines whether or not the download content can be acquired. Here, when the channel selection frequency of the tuner unit 11 is different from the frequency used for sending the download content, the control unit 30 determines that the download content cannot be acquired and proceeds to step ST8. Further, the control unit 30 determines that the download content can be acquired when the channel selection frequency of the tuner unit 11 is a frequency used for sending the download content, and proceeds to step ST9.

  In step ST8, the control unit 30 performs a channel selection frequency switching process, and the tuner signal 11 is switched by the control signal CT so that the channel selection frequency of the tuner unit 11 during the broadcast reception operation is switched to the frequency used for sending the download content. The operation of the unit 11 is controlled, and the process proceeds to step ST9. Further, the control unit 30 controls the operation of the video presentation processing unit 15 to display that the download content is being acquired and the progress of the acquisition status on the screen of the display device. This display may continue to be displayed until the time when the download content is finished.

  In step ST9, the control unit 30 determines whether or not a tuning frequency switching operation has been performed. When the operation signal PS supplied from the user interface unit 31 is a channel selection frequency switching operation, the control unit 30 indicates that the operation signal PS indicates a channel switching operation. When it is necessary to switch the channel selection frequency of the tuner unit 11 for viewing, the process proceeds to step ST12. Further, the control unit 30 proceeds to step ST10 when the operation signal PS is not supplied from the user interface unit 31 or when the operation signal PS supplied from the user interface unit 31 is not a channel selection frequency switching operation.

  In step ST10, the control unit 30 determines whether or not download content can be acquired. The control unit 30 determines that the download content can be acquired when the frequency used for sending the download content is being selected, and proceeds to step ST11. If the frequency is not being selected, the control unit 30 cannot acquire the download content. Proceed to ST14.

  In step ST11, the control unit 30 performs download processing, extracts a packet of download content from the transport stream by the demultiplexer 13, and sequentially stores the download content included in the extracted packet in the nonvolatile memory unit 33a. The process is performed and the process proceeds to step ST14.

  When the channel switching operation is performed in step ST9 and the process proceeds to step ST12, the control unit 30 performs a channel selection frequency switching process. In this tuning frequency switching process, when a process of extracting download contents and sequentially storing them in the nonvolatile memory unit 33a is performed, this process is stopped. When this process is stopped, the display indicating that download content is being acquired and the progress of the acquisition status is terminated. Thereafter, the control unit 30 generates the control signal CT according to the channel switching operation and supplies it to the tuner unit 11, thereby switching the tuning frequency of the tuner unit 11 to the tuning frequency according to the channel switching operation, step ST13. Proceed to

  In step ST13, the control unit 30 determines whether the download content can be acquired. Here, when the tuning frequency of the tuner unit 11 is different from the frequency used for sending the download content, the control unit 30 determines that the download content cannot be acquired, and proceeds to step ST14. Further, the control unit 30 determines that the download content can be acquired when the channel selection frequency of the tuner unit 11 is a frequency used for sending the download content, and proceeds to step ST11.

  In step ST14, the control unit 30 determines whether or not the download content transmission period has ended. The control unit 30 returns to step ST9 when the current time indicated by the clock unit 32 is not the time elapsed from the start time indicated by SDTT (end time of the transmission period), and returns to step ST9. When it is after the end time, the process proceeds to step ST15.

  In step ST15, the control unit 30 determines whether or not the download content is complete. The control unit 30 proceeds to step ST16 when determining that the download contents sequentially stored in the nonvolatile memory unit 33a are complete, and proceeds to step ST17 when determining that the download content is not complete.

  In step ST16, the control unit 30 performs a download completion process and proceeds to step ST18. For example, as the download completion process, the control unit 30 performs update / addition of software using the download content, update of data used in common by all receiving apparatuses, and the like. Further, the control unit 30 controls the operation of the video presentation processing unit 15 to display on the screen of the display device 16 that the download has been completed.

  In step ST17, the control unit 30 sets a download schedule and proceeds to step ST18. In this download schedule setting, the control unit 30 determines the transmission timing of the next download content based on the SDTT information in order to obtain data for which the download content is insufficient. Set to process. Further, when the download schedule is set, for example, the download content transmission start time and the transmission continuation time may be displayed next.

  In step ST18, the control unit 30 determines whether or not the channel selection frequency is switched during the acquisition of the download content. The control unit 30 ends the download operation when the channel selection frequency switching operation is performed in step ST9 during acquisition of the download content and the channel selection frequency switching process is performed in step ST12. When the channel selection frequency is not switched, the process proceeds to step ST19.

  In step ST19, the control unit 30 performs a tuning frequency restoration process. In step ST8, the control unit 30 switches the channel selection frequency and automatically switches the channel selection frequency to a frequency at which download content is transmitted. Therefore, in step ST19, the channel selection frequency before the automatic switching is restored to terminate the download operation. That is, when the channel selection frequency switching operation is not performed after the automatic channel selection, since the switching to the channel desired by the user is not performed during the acquisition of the download content, the control unit 30 sets the channel selection frequency. The frequency is returned to the frequency before the automatic channel selection, and the broadcast content of the organization channel being viewed when starting the acquisition of the download content is presented, and the download operation is terminated.

  In the above-described embodiment, when the download content automatic acquisition display, the display indicating that the download content is being acquired, the display indicating the progress of the acquisition status, the display indicating that the download has been completed, and the download schedule are set. The schedule display or the like is displayed on the display device 16, but the speaker 18 may be notified by voice. In the case of a broadcast receiving device that does not include a display device 16 that displays video of broadcast content or a speaker 18 that presents audio, such as a set top box, a display device such as a liquid crystal device that is provided in the broadcast receiving device. Display is performed using a display element, a fluorescent display tube, a light emitting diode, or the like.

  In this way, even when a broadcast receiving apparatus provided with only one tuner for receiving a digital broadcast is operated in a store or the like, download contents can be automatically acquired. By updating / adding or updating data that is commonly used by all receivers, there is no continuous display in the state where there are problems or new functions are not available. It is possible to prevent the user from being disadvantaged and the user's evaluation of the broadcast receiving apparatus from being lowered.

  Note that the download content acquisition operation described above can be performed only with a function (store mode) that allows a special operation when selling the broadcast receiving device, so that the user who purchased the broadcast receiving device can watch the program. Thus, it is possible to prevent the channel selection frequency from being automatically switched. Also, when the store mode is not set, for example, the download content is acquired during the standby period as in the conventional case, so that it is automatically used for updating / adding software or being commonly used by all receiving devices. The data can be updated.

It is a functional block diagram of a broadcast receiving apparatus. It is a figure which shows the structure of a transport stream. It is a figure which shows the structure of SDTT. It is a flowchart which shows acquisition operation | movement (1/2) of a download content. It is a flowchart which shows the acquisition operation (2/2) of download content.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Broadcast receiving device, 11 ... Tuner part, 12 ... Demodulation part, 13 ... Demultiplexer, 14 ... Decoder, 15 ... Video presentation processing part, 16 ... Display apparatus , 17 ... Audio output processing unit, 18 ... Speaker, 20 ... Bus, 30 ... Control unit, 31 ... User interface unit, 32 ... Clock unit, 33 ... Memory unit 33a ... Nonvolatile memory part, 33b ... Volatile memory part

Claims (7)

A tuner unit that selects a digital broadcast and outputs a received signal;
A demodulator that demodulates the received signal and outputs a data stream;
An extraction unit for extracting information multiplexed from the data stream;
A user interface unit that generates an operation signal according to a user operation;
A control unit that controls the tuner unit and the extraction unit in response to the operation signal;
The control unit determines a transmission period of download content based on the download notification information extracted by the extraction unit, and when the transmission period is reached during a broadcast receiving operation, the tuning frequency of the tuner unit is downloaded. A broadcast receiving apparatus, wherein the download content is extracted by the extraction unit by switching to a frequency of digital broadcasting including the content. When an operation signal indicating a tuning frequency switching operation of the tuner unit is supplied during the extraction of the download content, the control unit stops the extraction of the download content and sets the tuning frequency of the tuner unit. When the operation signal indicating the switching operation for switching the channel selection frequency of the tuner unit to the frequency of the digital broadcast including the download content is supplied during the download content transmission period, the tuner unit The broadcast receiving apparatus according to claim 1, wherein the channel selection frequency is switched to a frequency of digital broadcasting including the download content, and the extraction of the download content is resumed. A memory unit for storing the download content;
When the download content stored in the memory unit is not completed, the control unit causes the extraction unit to extract insufficient information in the download content during the subsequent transmission period, and stores the information in the memory unit. The broadcast receiving apparatus according to claim 1. When the operation signal indicating the tuning frequency switching operation of the tuner unit is not supplied during the extraction of the download content, the control unit determines the tuning frequency of the tuner unit when the transmission period ends. 2. The broadcast receiving apparatus according to claim 1, wherein the channel selection frequency is switched to a channel selection frequency before switching to a digital broadcast frequency including the download content. The control unit performs channel selection frequency switching notification before a predetermined period before the transmission period, and indicates an operation to stop switching of the channel selection frequency during the period from the notification to the transmission period. 2. The broadcast receiving apparatus according to claim 1, wherein when the signal is supplied, switching of the tuning frequency and extraction of the download content are stopped. The control unit switches the channel selection frequency of the tuner unit to the frequency of digital broadcasting including the download content when the transmission period is in a state where the operation mode is set to a predesignated mode, The broadcast receiving apparatus according to claim 1, wherein the download content is extracted by the extraction unit. A receiving step of selecting a digital broadcast and obtaining a received signal;
A demodulating step of demodulating the received signal obtained in the receiving step to obtain a data stream;
An extraction step for extracting multiplexed information from the data stream obtained in the demodulation step;
Based on the download notification information extracted in the extraction step, the transmission period of the download content is determined, and when the transmission period is reached during the broadcast receiving operation, the channel selection frequency is switched to the frequency of the digital broadcast including the download content. And a download content acquisition method comprising a control step of extracting the download content.

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