JP2017200100A - Broadcast receiver and reception changeover control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcast receiver and a reception changeover control method, enabling efficient reception of data broadcast with the suppression of the invalid file reception of the data broadcast, when alternately changing over between data broadcasting reception processing and other processing using one tuner.SOLUTION: The broadcast receiver includes: a transmission start time calculation unit 131 which calculates the transmission start time of each file to be received by first reception processing; based on the transmission start time of each calculated file a changeover timing determination unit 132 which determines timing at which a second tuner unit 120 changes over from second reception processing to first reception processing; and a changeover control unit 133 which, according to the determined changeover timing, controls the second tuner unit 120 in order to perform a changeover from the second reception processing to the first reception processing. This enables the reception of a file from the top when the second tuner unit 120 changes over from the second reception processing to the first reception processing.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a broadcast receiving apparatus and a reception switching control method, and more particularly, to a data broadcast receiving apparatus and a reception switching control method in which a data broadcast reception process and another reception process different from the data broadcast reception process are performed by one tuner. And suitable.

  Conventionally, DAB (Digital Audio Broadcast), which is used as one of broadcasting standards, has a sub-tuner separately from the main tuner that receives the main broadcast, and the sub-tuner is in the background where the main tuner is receiving the main broadcast. The tuner is adapted to receive data broadcasts. Data broadcasting broadcasts digital data such as EPG (Electronic Program Guide) and TPEG (Transport Protocol Experts Group) traffic information as files, and the sub-tuner sequentially receives a plurality of files.

  In DAB, the sub-tuner also performs scan processing for creating a service list (receivable frequency table) representing a list of receivable channels. By selecting a desired broadcast service from the service list, the user can switch to receive a broadcast station received by the main tuner and view a desired program.

  As described above, since the data broadcast reception process and the scan process are performed by one sub-tuner, it is necessary to alternately switch between the two processes. Conventionally, two processes are alternately performed in a predetermined allocation time according to a predetermined priority order.

  In Patent Document 1 below, in a multi-broadcasting receiving apparatus including a main tuner that receives a program broadcast and a sub-tuner that receives road traffic information transmitted at a predetermined interval, the sub-tuner uses road traffic. A technique is disclosed in which the reception status of the alternative station frequency of the same program broadcast received by the main tuner is checked while the information is not received, and the main tuner is operated to follow the alternative station frequency having a good reception status.

  Further, in Patent Document 2 below, in a radio broadcast receiver having a main tuner and a background tuner, a diversity function (such as scanning an alternative frequency band of a radio broadcast program selected by the main tuner) is impaired. In addition, there is disclosed a technique that makes it possible to stably receive TMC (traffic message channel) data on a predetermined radio broadcast program using a background tuner. In the wireless broadcast receiver described in Patent Document 2, the first data block in the second broadcast channel signal is received by the background tuner, and the transmission time of the second data block in the second broadcast channel signal is set. Estimate and upon completion of reception of the first data block, tune the background tuner to the third reception frequency and tune the background tuner to the second reception frequency at the estimated second data block time To do.

JP 2005-159868 A JP 2004-343745 A

  In a receiving apparatus in which data broadcasting reception processing and scanning processing are alternately switched by a single tuner, the conventional processing in which two processings are alternately performed with a predetermined allocation time separated is performed as scanning processing. The processing time allocated to is set to a predetermined length. On the other hand, data broadcasting is sequentially transmitted in units of files.

  Therefore, if the transmission of a file has already started when the scanning process for a predetermined time is completed and switching to the reception of data broadcasting is performed, the file becomes incomplete from the middle. End up. For this reason, the received file becomes invalid and must be received again from the beginning when it is transmitted next time.

  Since such an event can occur in all the reception target files, there has been a problem that it takes a long time to complete reception of all the reception target files. Further, incomplete files remain in the memory, and as the number of such incomplete files gradually increases, there may be a problem that the capacity of the memory is compressed.

  FIG. 6 is a diagram illustrating an example of a switching operation between a data broadcast reception process and a scan process by a conventional broadcast receiving apparatus. In FIG. 6, processes (data broadcast reception process and scan process) performed by the background tuner of the broadcast receiving apparatus are shown in time series. As shown in FIG. 6, the background tuner alternately performs data broadcast reception processing and scanning processing.

  In the example of FIG. 6, the data transmitted by data broadcasting constitutes one carousel with the head directory information (header information) and the six files 1 to 6. In data broadcasting, since this carousel is repeatedly transmitted, the background tuner repeatedly receives this carousel.

  In the example of FIG. 6, first, the background tuner starts receiving the data broadcast file 1 following the directory information (timing t1). Then, when the reception of the file 1 is completed, the background tuner switches to scan processing (timing t2). Then, the background tuner executes the scan process for a predetermined time. While the background tuner is executing the scanning process, the files 2 and 3 are sequentially transmitted after the file 1 in the data broadcasting. However, the background tuner does not receive these files 2 and 3 while executing the scanning process.

  Then, the background tuner switches to the data broadcast reception process after a predetermined time has elapsed from the start of the scan process (timing t3). At this time, since the transmission of the file 3 has already started, the background tuner receives the file 3 from the middle. For this reason, the file 3 received by the background tuner is invalid. When the background tuner finishes receiving the file 3 (timing t4), the background tuner receives the next transmitted file 4 from the top. For this reason, the file 4 received by the background tuner is valid.

  Then, when the reception of the file 4 is completed, the background tuner switches to scan processing (timing t5). Then, the background tuner executes the scan process for a predetermined time. While the background tuner is executing the scanning process, in the data broadcasting, the files 5 and 6 are sequentially transmitted following the file 4. However, the background tuner does not receive these files 5 and 6 while the scan process is being executed.

  Then, the background tuner switches to the data broadcast reception process after a predetermined time has elapsed from the start of the scan process (timing t6). At this time, since the transmission of the file 6 has already started, the background tuner receives the file 6 from the middle. For this reason, the file 6 received by the background tuner is invalid. When the background tuner finishes receiving the file 6 (timing t7), the background tuner receives the directory information and the file 1 transmitted next from the head.

  Here, the file 1 has already been received, but the background tuner receives the file 1 as it is. Then, when the reception of the file 1 is completed, the background tuner switches to scan processing (timing t8). Thereafter, the background tuner repeatedly performs the same processing.

  In the above operation, the only valid files received are files 1 and 4. Since the files 3 and 6 are received but are incomplete, it is necessary to re-receive those transmitted from the next time. File 1 has been received twice, while files 2 and 5 have never been received. For this reason, the files 2 and 5 need to be received again after the next transmission. As described above, in the conventional switching operation between the data broadcast reception process and the scan process, the data broadcast file reception process is inefficient, and it takes a long time to complete the reception of all files.

  The present invention has been made to solve such a problem. When a tuner performs alternately switching between data broadcasting reception processing and other processing, invalid file reception of data broadcasting is performed. It aims at suppressing and enabling data broadcasting to be received efficiently.

  In order to solve the above-described problems, in the present invention, the first tuner unit that receives program data in digital broadcasting, the first reception process that receives a file of data broadcasting, and the first reception process In a broadcast receiving apparatus having a second tuner unit that performs switching between different second reception processes alternately, a transmission start time of a file to be received by the first reception process is calculated, and the calculated file The second tuner unit determines the timing for switching from the second reception process to the first reception process based on the transmission start time of the first, and the second reception process to the first reception process according to the determined switching timing. The second tuner unit is controlled so as to switch to.

  According to the present invention configured as described above, the switching timing from the second reception process to the first reception process is set so that the file can be received from the beginning based on the transmission start time of the data broadcast file. Can be controlled. For this reason, according to the present invention, when data tuner reception processing and other processing are alternately switched by one tuner, invalid data reception of data broadcasting is suppressed and data broadcasting is efficiently received. Can be able to.

It is a block diagram which shows the function structural example of the broadcast receiver which concerns on 1st Embodiment of this invention. It is a flowchart which shows an example of the process by the broadcast receiver which concerns on 1st Embodiment of this invention. It is a figure which shows an example of switching operation | movement with the data broadcast reception process and scan process by the broadcast receiver which concerns on 1st Embodiment of this invention. It is a block diagram which shows the function structural example of the broadcast receiver which concerns on 2nd Embodiment of this invention. It is a figure which shows an example of the switching operation | movement of the data broadcast reception process by the broadcast receiver which concerns on 2nd Embodiment of this invention. It is a figure which shows an example of the switching operation | movement of the data broadcast reception process and scanning process by the conventional broadcast receiving apparatus.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

[Functional configuration example of broadcast receiving apparatus 10]
FIG. 1 is a block diagram showing a functional configuration example of a broadcast receiving apparatus 10 according to the first embodiment of the present invention. A broadcast receiving apparatus 10 shown in FIG. 1 is an apparatus capable of receiving DAB broadcasting. The broadcast receiving apparatus 10 includes a sub tuner (second tuner unit 120) separately from the main tuner (first tuner unit 110) that receives the main broadcast, and the sub tuner (second tuner unit 120) receives the main broadcast in the background. A tuner receives data broadcasting (for example, EPG, TPEG, BWS (Broadcasting Web Site), etc.).

  As shown in FIG. 1, the broadcast receiving device 10 includes a first tuner unit 110, a second tuner unit 120, and a switching control device 130. The switching control device 130 includes a transmission start time calculation unit 131, a switching timing determination unit 132, a switching control unit 133, a file information storage unit 134, a file information acquisition unit 135, and a second switching control unit 136. The first tuner unit 110 is connected to the antenna 11 and the speaker 13. The second tuner unit 120 is connected to the antenna 11 and the display 12.

  Each of the functional blocks 131 to 136 can be configured by any of hardware, DSP (Digital Signal Processor), and software. For example, when configured by software, each of the functional blocks 131 to 136 is actually configured by including a CPU, RAM, ROM, etc. of a computer, and is stored in a recording medium such as RAM, ROM, hard disk, or semiconductor memory. Is realized by operating.

  The first tuner unit 110 (main tuner) receives program data in digital broadcasting via the antenna 11. The program data received by the first tuner unit 110 is converted into a format that can be output through a process such as decoding, and then output from the speaker 13 so that the user can view it.

  Second tuner unit 120 (background tuner) alternately switches between a first reception process for receiving a data broadcast file via antenna 11 and a second reception process different from the first reception process. Do it. In the present embodiment, the first reception process performed by the second tuner unit 120 is a data broadcast reception process. Data broadcast information received by the data broadcast reception process constitutes a carousel composed of directory information and a plurality of files (see FIG. 3). Each file is composed of a plurality of segments, and information such as file identification information is stored in the first segment. The directory information includes information such as the number and size of segments constituting each file. In the present embodiment, the definition of “receive file” includes not only receiving each file but also receiving directory information.

  The second reception process performed by the second tuner unit 120 is a scan process for creating a service list in digital broadcasting. The second tuner unit 120 alternately performs data broadcast reception processing and scanning processing. Switching from the scanning process to the data broadcast receiving process is controlled by a switching control unit 133 (to be described later) so as to be performed immediately before the transmission start time of the next reception target file. Further, the switching from the data broadcast reception process to the scan process is, as a general rule, performed when the reception of the file in the complete state is completed. However, if the file to be received next has already been received after switching from the scan process to the data broadcast reception process, the second switching control unit 136 described later switches the data broadcast reception process to the scan process. Switching is controlled. The data broadcast data received by the second tuner unit 120 and the service list generated by the second tuner unit 120 are output from the display 12 so that the user can browse.

  The transmission start time calculation unit 131 calculates the transmission start time of the file to be received by the data broadcast reception process. Specifically, the transmission start time calculation unit 131 performs the file reception end time when the second tuner unit 120 switches from the data broadcast reception process to the scan process, and the scan process (second reception process). Transmission of the file to be received that is transmitted next to the unreceived file is started based on the file size of the file that is transmitted (hereinafter referred to as “unreceived file”) and the transmission rate of the unreceived file. Calculate time. For example, the file size of the unreceived file can be calculated from the number of segments and the segment size of the unreceived file included in the directory information. The transmission rate of the unreceived file can be acquired from service information that can be acquired when the second tuner unit 120 is selected. This transmission rate is a transmission rate related to reception of data broadcasting, and is a value common to each file.

  Based on the transmission start time of the next reception target file calculated by the transmission start time calculation unit 131, the switching timing determination unit 132 determines the timing at which the second tuner unit 120 switches from the scan process to the data broadcast reception process. . In particular, in the present embodiment, the switching timing determination unit 132 switches the timing before the transmission start time of the reception target file calculated by the transmission start time calculation unit 131 from the scan process to the data broadcast reception process. To be determined as.

  The switching control unit 133 controls the second tuner unit 120 so as to switch from the scanning process to the data broadcast receiving process according to the switching timing determined by the switching timing determination unit 132.

  The file information storage unit 134 stores identification information of a file that has been received by the data broadcast reception process. For example, when transmission of a reception target file by data broadcast reception processing is started, the file information acquisition unit 135 acquires identification information of the file from the first segment of the file. Then, when the reception of the file by the data broadcast reception process is completed, the file information storage unit 134 stores the identification information of the file acquired by the file information acquisition unit 135.

  The file information acquisition unit 135 acquires the identification information of the file from the next file when transmission of the next file is started after reception of one file is completed. For example, the file information acquisition unit 135 acquires the identification information of the file from the first segment of the file.

  The second switching control unit 136 receives the next information acquired by the file information acquisition unit 135 when transmission of the next file is started after the second tuner unit 120 switches from the scan process to the data broadcast reception process. When the file identification information is already stored in the file information storage unit 134, the second tuner unit 120 is controlled to switch from the data broadcast reception process to the scan process.

[Example of processing by broadcast receiving apparatus 10]
FIG. 2 is a flowchart showing an example of processing by the broadcast receiving apparatus 10 according to the first embodiment of the present invention. The process illustrated in FIG. 2 is started, for example, when the power of the broadcast receiving apparatus 10 is switched on, and is continuously executed until the power of the broadcast receiving apparatus 10 is switched off.

  First, the second tuner unit 120 receives a file (initially directory information) by data broadcast reception processing (step S202). Then, the second tuner unit 120 determines whether or not the reception of the file by the data broadcast reception process has been completed (step S204). Here, when the second tuner unit 120 determines that the reception of the file has not ended (step S204: No), the second tuner unit 120 executes the process of step S204 again.

  On the other hand, when the second tuner unit 120 determines that the reception of the file has ended (step S204: Yes), the second tuner unit 120 determines whether or not the file whose reception has ended is directory information (step S204). S206). Here, when the second tuner unit 120 determines that the received file is the directory information (step S206: Yes), the second tuner unit 120 executes the processes after step S202 again. On the other hand, when the second tuner unit 120 determines that the received file is not directory information (step S206: No), the second tuner unit 120 advances the processing to step S208.

  In step S208, the file information storage unit 134 stores the identification information of the received file. Then, the second tuner unit 120 starts a scanning process (step S210). Also, the transmission start time calculation unit 131 calculates the transmission start time of the next reception target file that is transmitted next to the unreceived file transmitted during the scanning process (step S212). Furthermore, the switching timing determination unit 132 determines the timing before the transmission start time of the next reception target file calculated in step S212 as the switching timing for switching from the scanning process to the data broadcast reception process (step S214). ).

  Thereafter, the switching control unit 133 determines whether or not the switching timing determined in step S214 has arrived (step S216). Here, when the switching control unit 133 determines that the switching timing has not arrived (step S216: No), the switching control unit 133 executes the process of step S216 again. On the other hand, when the switching control unit 133 determines that the switching timing has arrived (step S216: Yes), the second tuner unit 120 switches from the scanning process to the data broadcast receiving process under the control of the switching control unit 133. This is performed (step S218). At this time, since the transmission of the next reception target file has not yet started, the second tuner unit 120 receives the remaining part of the unreceived file.

  Thereafter, the second tuner unit 120 determines whether or not transmission of the next reception target file is started (step S220). Here, when the second tuner unit 120 determines that transmission of the next reception target file has not started (step S220: No), the second tuner unit 120 executes the process of step S220 again.

  On the other hand, when the second tuner unit 120 determines that transmission of the next reception target file has started (step S220: Yes), the file information acquisition unit 135 determines the identification information of the reception target file from the reception target file. Is acquired (step S222). Then, the second switching control unit 136 determines whether or not the identification information of the reception target file acquired in step S222 is stored in the file information storage unit 134 (step S224).

  Here, when the second switching control unit 136 determines that the identification information of the next reception target file is not stored in the file information storage unit 134 (step S224: No), the process returns to step S202, and the second tuner unit 120 receives the reception target file as it is (step S202). Then, the second tuner unit 120 executes the processes after step S204 again.

  On the other hand, when the second switching control unit 136 determines that the identification information of the next reception target file is stored in the file information storage unit 134 (step S224: Yes), the second switching control unit 136 controls it. The second tuner unit 120 switches from the data broadcast reception process to the scan process (step S226). Then, the second tuner unit 120 executes the processes after step S210 again.

[Example of switching operation by broadcast receiving apparatus 10]
FIG. 3 is a diagram illustrating an example of a switching operation between the data broadcast receiving process and the scan process by the broadcast receiving apparatus 10 according to the first embodiment of the present invention. In FIG. 3, processes (data broadcast reception process and scan process) performed by the second tuner unit 120 of the broadcast receiving apparatus 10 are shown in time series. As shown in FIG. 3, the second tuner unit 120 alternately performs data broadcast reception processing and scanning processing.

  In the example of FIG. 3, the data transmitted by data broadcasting constitutes one carousel with the head directory information (header information) and the six files 1 to 6. In data broadcasting, since this carousel is repeatedly transmitted, the second tuner unit 120 repeatedly receives this carousel.

  In the example of FIG. 3, first, the second tuner unit 120 starts receiving the data broadcast file 1 following the reception of the directory information (timing t1). Then, when the reception of the file 1 is completed, the second tuner unit 120 switches from the data broadcast reception process to the scan process (timing t2).

  At this time, the file information storage unit 134 stores the received identification information of the file 1. In addition, the transmission start time calculation unit 131 receives the file 1 reception end time (that is, timing t2), the file size of the unreceived file (that is, file 2) that is transmitted during the scanning process, and the file Based on the transmission rate of 2, the transmission start time of the reception target file (that is, the file 3) transmitted next to the unreceived file is calculated. Here, the file size of the file 2 can be calculated from the number of segments and the segment size of the file 2 included in the directory information. Further, the transmission rate of the file 2 can be acquired from service information that can be acquired when the second tuner unit 120 is selected. This transmission rate is a value common to the files 1 to 6.

  Furthermore, the switching timing determination unit 132 sets the timing (timing t3) before the transmission start time of the file 3 calculated by the transmission start time calculation unit 131 as a switching timing for switching from the scan process to the data broadcast reception process. decide.

  Then, when the determined switching timing arrives, the second tuner unit 120 switches from the scan process to the data broadcast reception process under the control of the switching control unit 133 (timing t3). At this time, although the file 2 which is an unreceived file is being transmitted, the transmission of the file 2 is immediately finished and the transmission of the file 3 is started. When transmission of the file 3 is started, the file information acquisition unit 135 acquires the identification information of the file 3 from the head segment of the file 3. Here, since the acquired identification information of the file 3 is not stored in the file information storage unit 134, the second tuner unit 120 receives the file 3 from the top. Therefore, the file 3 received by the second tuner unit 120 is valid.

  Then, when the reception of the file 3 is completed, the second tuner unit 120 switches from the data broadcast reception process to the scan process (timing t4).

  At this time, the file information storage unit 134 stores the received identification information of the file 3. In addition, the transmission start time calculation unit 131 receives the file 3 reception end time (that is, timing t4), the file size of the unreceived file (that is, file 4) transmitted during the scanning process, and the file On the basis of the transmission rate of 4, the transmission start time of the reception target file (that is, the file 5) transmitted next to the unreceived file is calculated.

  Further, the switching timing determination unit 132 sets the timing (timing t5) before the transmission start time of the file 5 calculated by the transmission start time calculation unit 131 as a switching timing for switching from the scan process to the data broadcast reception process. decide.

  When the determined switching timing arrives, the second tuner unit 120 switches from the scan process to the data broadcast reception process under the control of the switching control unit 133 (timing t5). At this time, transmission of the file 4, which is an unreceived file, is in progress, but the transmission of the file 4 is immediately terminated, and then transmission of the file 5 is started. When transmission of the file 5 is started, the file information acquisition unit 135 acquires the identification information of the file 5 from the head segment of the file 5. Here, since the acquired identification information of the file 5 is not stored in the file information storage unit 134, the second tuner unit 120 receives the file 5 from the top. Therefore, the file 5 received by the second tuner unit 120 is valid.

  Then, when the reception of the file 5 is completed, the second tuner unit 120 switches from the data broadcast reception process to the scan process (timing t6).

  At this time, the file information storage unit 134 stores the received identification information of the file 5. Further, the transmission start time calculation unit 131 receives the reception end time of the file 5 (that is, timing t6), the file size of the unreceived file (that is, the file 6) that is transmitted during the scanning process, and the file Based on the transmission rate of 6, the transmission start time of the reception target file (that is, directory information) transmitted next to the unreceived file is calculated.

  Further, the switching timing determination unit 132 sets a timing (timing t7) before the transmission start time of the directory information calculated by the transmission start time calculation unit 131 as a switching timing for switching from the scan process to the data broadcast reception process. decide.

  When the determined switching timing arrives, the second tuner unit 120 switches from the scan process to the data broadcast reception process under the control of the switching control unit 133 (timing t7). At this time, the file 6 that is an unreceived file is being transmitted, but the transmission of the file 6 is immediately terminated and the transmission of the directory information is started. Therefore, the second tuner unit 120 can receive the directory information from the top.

  Then, when the second tuner unit 120 finishes receiving the directory information, the file information acquisition unit 135 acquires the identification information of the file 1 from the first segment of the file 1 that is continuously transmitted. Here, since the file 1 is a received file, its identification information is already stored in the file information storage unit 134. Therefore, the second tuner unit 120 switches from the data broadcast reception process to the scan process under the control of the second switching control unit 136 without performing the reception of the file 1 again (timing t8).

  At this time, the transmission start time calculation unit 131 receives the directory information reception end time (that is, timing t8), the file size of the unreceived file (that is, file 1) that is transmitted during the scanning process, Based on the transmission rate of file 1, the transmission start time of the reception target file (that is, file 2) transmitted next to the unreceived file is calculated. Furthermore, the switching timing determination unit 132 sets a timing (timing t9) that is a predetermined time before the transmission start time of the file 2 calculated by the transmission start time calculation unit 131 as a switching timing for switching from the scan process to the data broadcast reception process. decide.

  Then, when the determined switching timing arrives, the second tuner unit 120 switches from the scan process to the data broadcast reception process under the control of the switching control unit 133 (timing t9). At this time, the transmission of the file 1 which is an unreceived file is in progress, but the transmission of the file 1 is immediately finished and the transmission of the file 2 is started. When the transmission of the file 2 is started, the file information acquisition unit 135 acquires the identification information of the file 2 from the file 2. Here, since the acquired identification information of the file 2 is not stored in the file information storage unit 134, the second tuner unit 120 receives the file 2 from the top. Therefore, the file 2 received by the second tuner unit 120 is valid. Thereafter, the second tuner unit 120 repeatedly executes the same processing.

  In the operation as described above, the received valid files are the files 1, 2, 3, and 5. It is obvious that the remaining files 4 and 6 to be received can be immediately received in an effective state by performing the data broadcast reception process two more times by continuing the operation of FIG.

  Thus, according to the broadcast receiving apparatus 10 of the present embodiment, the transmission start time of the data broadcast file is calculated, and the switching timing from the scan process to the data broadcast reception process is controlled immediately before that, so the file Can be received from the beginning. For this reason, according to the broadcast receiving apparatus 10 of the present embodiment, when the data broadcast reception process and the other processes are alternately switched by one tuner, the invalid file reception of the data broadcast is suppressed, and the data Broadcasting can be received efficiently.

  Further, according to the broadcast receiving apparatus 10 of the present embodiment, since the identification information of the received file is stored, it is determined whether or not the file to be transmitted is a received file. Instead, while the file is being transmitted, a scan process can be performed instead. For this reason, according to the broadcast receiving apparatus 10 of the present embodiment, it is possible to efficiently perform both the data broadcast reception process and the scan process without unnecessary re-reception of the received file.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the scan process is performed as the second reception process, but the present invention is not limited to this. For example, as described in the second embodiment below, as the second reception process, a data broadcast reception process different from the data broadcast reception process performed as the first reception process may be performed.

[Functional configuration example of broadcast receiving apparatus 10 ']
FIG. 4 is a block diagram showing a functional configuration example of a broadcast receiving apparatus 10 ′ according to the second embodiment of the present invention. 4 includes a second tuner unit 120 ′ instead of the second tuner unit 120, and the switching control unit 130 switches to the switching control unit 133 instead of the switching control unit 133. It differs from the broadcast receiving apparatus 10 (refer FIG. 1) of 1st Embodiment by the point provided with 133 '.

  In the second embodiment, the first reception process performed by the second tuner unit 120 ′ is a data broadcast reception process for receiving a file of the first data type (hereinafter referred to as “first data broadcast reception process”). ). On the other hand, the second reception process performed by the second tuner unit 120 ′ is a data broadcast reception process (hereinafter referred to as “second data broadcast reception”) for receiving a file having a second data type different from the first data type. Process ”).

  The first data broadcast reception process and the second data broadcast reception process may be any combination as long as the data types are different from each other. For example, a data broadcast reception process for receiving an EPG file is applied as the first data broadcast reception process, and a data broadcast reception process for receiving a TPEG file is applied as the second data broadcast reception process. Also good.

  Here, the second tuner unit 120 ′ alternately performs the first data broadcast reception process and the second data broadcast reception process. At this time, in principle, the second tuner unit 120 ′ is controlled by the switching control unit 133 ′ so that the file of the first data type is received with priority. However, when the reception of all files of the first data type is completed, the switching control unit 133 ′ is controlled to receive the file of the second data type with priority. This is because the number of invalid files of the second data type increases only by receiving files of the first data type with priority, and reception of all files of the second data type cannot be completed.

  Specifically, the switching control unit 133 ′ stores files of the first data type as shown in (1) and (2) below until reception of all files of the first data type is completed. The second tuner unit 120 ′ is controlled so as to receive with priority.

  (1) When the first data broadcast reception process is being performed, the switching control unit 133 ′ performs the first data broadcast reception process to the second data broadcast at the timing when reception of the first data type file is completed. The second tuner unit 120 ′ is controlled so as to switch to the reception process. Thus, the file of the first data type can be received to the end so that the file of the first data type to be acquired with priority is not invalidated.

  (2) When the second data broadcast reception process is being performed, the switching control unit 133 ′ uses the second data broadcast reception process to the first data broadcast reception process at the switching timing determined by the switching timing determination unit 132. The second tuner unit 120 ′ is controlled so as to switch to Thereby, the file of the first data type can be received from the head so that the file of the first data type to be acquired with priority is not invalidated. At this time, reception of the file of the second data type is interrupted in the middle, and the file of the second data type may become invalid. Priority is given to receiving the file from the beginning.

  On the other hand, after the reception of all the files of the first data type is completed, the switching control unit 133 ′ receives the file of the second data type with priority as shown in (3) and (4) below. Thus, the second tuner unit 120 ′ is controlled.

  (3) When the second data broadcast reception process is being performed, the switching control unit 133 ′ performs the first data broadcast from the second data broadcast reception process at the timing when reception of the file of the second data type is completed. The second tuner unit 120 ′ is controlled so as to switch to the reception process. Thus, the file of the second data type can be received to the end so that the file of the second data type to be acquired with priority is not invalidated.

  (4) When the first data broadcast reception process is being performed, the switching control unit 133 ′ uses the first data broadcast reception process to the second data broadcast reception process at the switching timing determined by the switching timing determination unit 132. The second tuner unit 120 ′ is controlled so as to switch to Thereby, the file of the second data type can be received from the head so that the file of the second data type to be acquired with priority is not invalidated. At this time, reception of the file of the first data type may be interrupted in the middle, and the file of the first data type may become invalid. Priority is given to receiving the file from the beginning.

  Further, after the reception of all the files of the second data type is completed, the switching control unit 133 ′ gives priority to the file of the first data type again as in (1) and (2) above. The second tuner unit 120 ′ is controlled to receive the signal. Thereby, for example, when the content of the data of the data broadcast is changed, the first data type file and the second data type file need to be acquired again. Files of the data type can be received with priority.

[Example of switching operation by broadcast receiving apparatus 10 ']
FIG. 5 is a diagram showing an example of a data broadcast reception process switching operation by the broadcast receiving apparatus 10 ′ according to the second embodiment of the present invention. In FIG. 5, the processes (first data broadcast reception process and second data broadcast reception process) performed by the second tuner unit 120 ′ of the broadcast receiving apparatus 10 ′ are shown in time series. As shown in FIG. 5, the second tuner unit 120 ′ alternately performs the first data broadcast reception process and the second data broadcast reception process.

  In the example of FIG. 5, the data of the first data type transmitted by data broadcasting constitutes one carousel with the head directory information (header information) and the six files A1 to A6. The second tuner unit 120 'receives the data of the first data type configured as described above by the first data broadcast reception process.

  In the example of FIG. 5, the data of the second data type transmitted by data broadcasting constitutes one carousel with the head directory information (header information) and the six files B1 to B6. The second tuner unit 120 ′ receives the data of the second data type configured as described above by the second data broadcast reception process.

  FIG. 5A shows a process performed by the second tuner unit 120 'before the second tuner unit 120' completes reception of all the files A1 to A6 of the first data type. In FIG. 5A, priority is given to reception of files A1 to A6 of the first data type (that is, first data broadcast reception processing). For this reason, when the second tuner unit 120 ′ performs the first data broadcast reception process, the second tuner unit 120 ′ starts from the first data broadcast reception process at the timing when the reception of the file of the first data type ends. Switch to the data broadcasting reception process. Therefore, in the first data broadcast reception process at this time, the file of the first data type can be completely received. On the other hand, when the second tuner 120 ′ performs the second data broadcast reception process, the second tuner unit 120 ′ performs the second timing at the switching timing immediately before the transmission start time of the next reception target file (first data type). The data broadcast reception process is switched to the first data broadcast reception process. Therefore, the second data broadcast reception process at this time may not be able to completely receive the file of the second data type.

  For example, in FIG. 5A, when the second tuner unit 120 ′ performs reception processing of the files A1, A3, and A5 by the first data broadcast reception processing, the reception of these files A1, A3, and A5 is performed. Is switched from the first data broadcast reception process to the second data broadcast reception process at the timing (time t2, t4, t6). On the other hand, when the second tuner unit 120 ′ performs the reception processing of the files B2 and B4 by the second data broadcast reception processing, the switching timing (timing t3, t5) immediately before the transmission start time of the files A3 and A5. Thus, the second data broadcast reception process is switched to the first data broadcast reception process.

  FIG. 5B shows processing performed by the second tuner unit 120 ′ after the second tuner unit 120 ′ has received all the files A1 to A6 of the first data type. In FIG. 5B, priority is given to reception of files B1 to B6 of the second data type (that is, second data broadcast reception processing). For this reason, when the second tuner 120 ′ performs the second data broadcast reception process, the second tuner 120 ′ starts from the second data broadcast reception process at the timing when the reception of the file of the second data type ends. Switch to the data broadcasting reception process. Therefore, in the second data broadcast reception process at this time, the file of the second data type can be completely received. On the other hand, when the first tuner 120 ′ performs the first data broadcast reception process, the first tuner 120 ′ performs the first tuner at the switching timing immediately before the transmission start time of the next reception target file (second data type). The data broadcast reception process is switched to the second data broadcast reception process. Therefore, the first data broadcast reception process at this time may not be able to completely receive the file of the first data type.

  For example, in FIG. 5B, when the second tuner unit 120 ′ performs the reception processing of the files B1, B3, and B5 by the second data broadcast reception processing, the files B1, B3, and B5 At the timing when reception ends (timing t2, t4, t6), the second data broadcast reception process is switched to the first data broadcast reception process. On the other hand, when the second tuner unit 120 ′ performs the reception processing of the files A2 and A4 by the first data broadcast reception processing, the switching timing (timing t3, t5 immediately before the transmission start time of the files B3 and B5) ) To switch from the first data broadcast reception process to the second data broadcast reception process.

  In this way, the second tuner unit 120 ′ has priority over the files B1 to B6 of the second data type until the reception of all the files A1 to A6 of the first data type is completed. It operates to receive each of the files A1 to A6 of one data type from the beginning to the end. Also, after completing the reception of all the files A1 to A6 of the first data type, the second tuner unit 120 ′ has priority over the files A1 to A6 of the first data type, It operates so as to receive each of the data type files B1 to B6 from the beginning to the end. Thus, the second tuner unit 120 ′ efficiently completes reception of all files for each of the files A1 to A6 of the first data type and the files B1 to B6 of the second data type. be able to.

  When the second tuner unit 120 ′ completes reception of all the files B1 to B6 of the second data type by the operation shown in FIG. 5B, again, as shown in FIG. Prior to the files B1 to B6 of the second data type, the first data type of files A1 to A6 are received from the beginning to the end. Thereby, for example, the content of the data of the data broadcast is changed, and it is necessary to acquire all the files again for each of the files A1 to A6 of the first data type and the files B1 to B6 of the second data type. 5A, as in FIG. 5A, the files A1 to A6 of the first data type are first given priority over the files B1 to B6 of the second data type. It is possible to receive from the beginning to the end.

  In the example shown in FIG. 5, first, the files A1 to A6 of the first data type are preferentially received over the files B1 to B6 of the second data type. Absent. That is, first, the files B1 to B6 of the second data type may be received with priority over the files A1 to A6 of the first data type. Further, the user may be able to set which of the files A1 to A6 of the first data type and the files B1 to B6 of the second data type are received first.

  In each of the above embodiments, every time one file is received by the first receiving process, the second receiving process is switched. However, every time a plurality of files are received by the first receiving process, You may make it switch to 2 receiving processing.

  Further, in each of the above embodiments, the number of unreceived files that are not received during the second reception process is one, but it may be plural. However, from the viewpoint of completing the reception of all files in a shorter time, it is preferable that the number of unreceived files is as small as possible.

  In each of the above embodiments, the transmission start time of the reception target file calculated by the transmission start time calculation unit 131 is equal to the transmission end time of an unreceived file transmitted before the reception target file. Therefore, in the above embodiment, instead of calculating the transmission start time of the reception target file, the transmission end time of the unreceived file may be calculated.

  In each of the above embodiments, the transmission start time of the next reception target file is calculated when the first reception process is switched to the second reception process. However, the present invention is not limited to this. . For example, when directory information is received, transmission start times of all files to be received may be calculated in advance.

  Further, in each of the above embodiments, the timing that is a predetermined time before the transmission start time of the next reception target file is determined as the switching timing for switching from the second reception process to the first reception process. If the next reception target file can be received from the head, the transmission start time itself of the next reception target file itself may be determined as the switching timing.

  In addition, each of the above-described embodiments is merely an example of a specific example for carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

10, 10 Broadcast receiving device 11 Antenna 12 Display 13 Speaker 110 First tuner unit 120, 120 ′ Second tuner unit 130 Switching control device 131 Transmission start time calculating unit 132 Switching timing determining unit 133, 133 ′ Switching control unit 134 File information storage unit 135 File information acquisition unit 136 Second switching control unit

Claims (9)

A first tuner unit for receiving program data in digital broadcasting;
A second tuner unit that alternately switches between a first reception process for receiving a data broadcast file and a second reception process different from the first reception process;
A transmission start time calculation unit for calculating a transmission start time of a file to be received by the first reception process;
A switching timing determination unit that determines a timing at which the second tuner unit switches from the second reception process to the first reception process based on the transmission start time of the file calculated by the transmission start time calculation unit; ,
A switching control unit that controls the second tuner unit to switch from the second reception process to the first reception process according to the switching timing determined by the switching timing determination unit. A broadcast receiving device characterized. The transmission start time calculation unit performs the file reception end time when the second tuner unit switches from the first reception process to the second reception process, and the second reception process. A transmission start time of a reception target file transmitted next to the unreceived file is calculated based on a file size of the unreceived file transmitted to the file and a transmission rate of the unreceived file. Item 2. The broadcast receiving device according to Item 1.   The switching timing determination unit switches a timing that is a predetermined time before the transmission start time of the reception target file calculated by the transmission start time calculation unit from the second reception process to the first reception process. The broadcast receiving apparatus according to claim 2, wherein the broadcast receiving apparatus is determined as follows. A file information storage unit for storing identification information of a file already received by the first reception process;
A file information acquisition unit that acquires identification information of the file from the next file when reception of one file is completed;
The identification information acquired by the file information acquisition unit when the transmission of the next file is started after the second tuner unit switches from the second reception process to the first reception process. Is already stored in the file information storage unit, a second switching control unit that controls the second tuner unit to switch from the first reception process to the second reception process; The broadcast receiving apparatus according to claim 1, further comprising: The broadcast receiving apparatus according to claim 1, wherein the second reception process is a scan process for creating a service list in the digital broadcast. The second reception process is a reception process of a file having a second data type different from the first data type related to the file received by the first reception process of the data broadcast. Item 5. The broadcast receiving device according to any one of Items 1 to 4. Until the reception of all the files of the first data type is completed by the first reception process, the first reception process to the first data are completed at the timing when the reception of the file of the first data type is completed. Switching to the second reception process, and switching from the second reception process to the first reception process at the switching timing determined by the switching timing determination unit,
After the reception of all the files of the first data type is completed by the first reception process, the first reception process starts from the second reception process at the timing when the reception of the file of the second data type is completed. The switch to the reception process and the switch from the first reception process to the second reception process at the switching timing determined by the switching timing determination unit. Broadcast receiving device. After the reception of all the files of the second data type is further completed by the second reception process, the second reception process starts from the first reception process at the timing when the reception of the file of the first data type ends. The switching from the second reception process to the first reception process is performed at the switching timing determined by the switching timing determination unit. Broadcast receiver. A first tuner for receiving program data in digital broadcasting, a first receiving process for receiving data broadcasting files, and a second receiving process different from the first receiving process are alternately switched. A reception switching control method executed by a broadcast receiving device including a second tuner unit,
A transmission start time calculating step of calculating a transmission start time of a file to be received by the first reception process by the transmission start time calculating unit of the broadcast receiving device;
Based on the file transmission start time calculated by the transmission start time calculation unit by the switching timing determination unit of the broadcast receiving device, the second tuner unit performs the first reception process from the second reception process. A switching timing determination step for determining the timing to switch to,
The switching control unit of the broadcast receiving device switches the second tuner unit so as to switch from the second receiving process to the first receiving process according to the switching timing determined by the switching timing determining unit. A switching control step for controlling the reception switching control method.