JP2012039213A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiver which, during frequency repacking, notifies a viewer of the reason for reception incapability by letting know the viewer an end of broadcast with the existing frequency so that the viewer does not mistake a reception incapability state due to the frequency repacking for failure of the receiver.SOLUTION: The receiver for receiving a broadcast wave has a storage unit for storing information transmitted by the broadcast wave and a determination unit for performing determination processing with the use of the information. The information transmitted by the broadcast wave includes broadcast frequency modification date/time information and pre-modification frequency information, the storage unit stores the broadcast frequency modification date/time information and the pre-modification frequency information in association with each other after the date of frequency modification, and the determination unit, at the time of reception incapability, determines whether the pre-modification frequency information and a selected frequency coincide with each other or not and whether the current date/time is after the date/time specified in the broadcast frequency modification date/time information or not, and announces the reason for the reception incapability on the basis of the determination results of the determination unit.

Description

  The present invention relates to a digital broadcast receiving apparatus, and more particularly to a terrestrial digital broadcast receiving apparatus and a digital cable broadcast receiving apparatus (hereinafter collectively referred to as a receiving apparatus) corresponding to a change in broadcast frequency.

  Domestic terrestrial television broadcasting will be completely transferred to digital broadcasting in July 2011. Thereafter, rearrangement of the broadcast frequency of the digital broadcast is performed. This is called frequency repacking. In accordance with this implementation period, it is expected that the broadcast at the conventional frequency will be terminated, and advertisements etc. notifying the start of the broadcast at the new frequency will be notified to the viewer through the broadcast. Also, information for frequency tracking to the rearranged frequency is transmitted from the broadcasting station to the receiving device side. As a result, the receiving apparatus main body supports frequency repacking without bothering the viewer.

  As information for frequency tracking, broadcast frequency change information and target area information of a broadcast target area are transmitted using a broadcast signal prior to the frequency repacking implementation time. The broadcast frequency change information includes pre-change frequency information and post-change frequency information. On the other hand, the receiving device has a function of allowing the viewer to input installation location information of the receiving device at the first activation. If the receiving apparatus acquires the broadcast frequency change information and the target area information, compares the installation location information and the target area information, and determines that both indicate the same area, before the change A reception frequency corresponding to the frequency is set as the changed frequency.

  As a technique related to frequency repacking, for example, Non-Patent Document 1 discloses that a receiving apparatus that has acquired information including a message addressed to a viewer transmitted from a broadcast station at the time of frequency repacking includes a target area, a change start year included in the information. It is disclosed that a message such as a date and a change work period is displayed to a viewer.

ARIB TR-B14 1st volume 1/2 4.0 edition (revised on December 16, 2009)

  However, although Non-Patent Document 1 is intended to display a message addressed to the viewer, it is not a technique for displaying the occurrence of a broadcast frequency change to the viewer at the occurrence timing of frequency repacking. For this reason, when the viewer receives the broadcast wave across the frequency repacking date and time, there is a possibility that the incapable reception state caused by the change in the broadcast frequency may be confused with the failure of the receiving device or a broadcast accident.

  The information for causing the receiving apparatus to follow the frequency includes target area information together with the broadcast frequency change information. The receiving apparatus acquires and determines this, and automatically sets the frequency change. However, the receiving device can also perform cross-border reception (reception in an area that is not originally targeted for broadcasting), and the area identification of the target area information transmitted together with the broadcast frequency change information is based on the preinstalled installation location information. Since the value is different from the area identification, in the case of cross-border reception, automatic frequency change setting is not performed even if broadcast frequency change information is acquired outside the target area. For this reason, it is expected that some receivers do not support cross-border reception frequency repacking, or that the receiver automatically performs a frequency search and performs frequency change settings.

  However, if the frequency repacking is not performed, reception is disabled after the frequency repacking. When the frequency search is performed, all broadcast frequencies are inspected. Therefore, after the frequency repacking, the changed frequency is captured. The viewer waits for at least several tens of seconds before the viewer can view again. During this time, messages such as “Cannot receive” or “Frequency search in progress” will be displayed on the receiver screen. As described above, the viewer will be unable to receive a failure due to frequency repacking. And reception failure.

  Therefore, the present invention solves the above-mentioned problem, and its purpose is to inform the viewer of the reason why it cannot be received by notifying the viewer of the end of broadcasting at the conventional frequency when performing frequency repacking. It is another object of the present invention to provide a receiving apparatus that does not confuse the reception failure state due to frequency repacking with a failure of the receiving apparatus.

  In order to solve the above-described problems, a receiving apparatus of the present invention includes a storage unit that stores information transmitted by broadcast waves, and a determination unit that performs determination processing using the information, and receives broadcast waves. In the receiving device, the information transmitted by the broadcast wave includes broadcast frequency change date / time information and pre-change frequency information, and the broadcast frequency change date / time information and the pre-change frequency information are associated with each other to change the frequency. Thereafter, stored in the storage unit, the determination unit, when reception is impossible, whether the frequency information before the change and the frequency being selected match, and the current date and time of the broadcast frequency change date information It is determined whether it is after the date and time, and based on the determination result of the determination unit, the reason for reception failure is notified.

  Furthermore, the receiving apparatus has a frequency search function, and notifies the viewer of the necessity of the frequency search based on the determined result.

  Preferably, the receiving device has a frequency search function, and when the current date is after the broadcast frequency change date and the frequency search is executed, the broadcast frequency change date information stored in the storage unit. The frequency information before change is erased or invalidated.

  When performing frequency repacking, inform the viewer of the end of broadcasting at the conventional frequency to inform the viewer why the signal cannot be received, and do not confuse the reception failure state due to frequency repacking with the failure of the receiving device. To provide a receiving apparatus.

It is a block diagram of the configuration of a receiving apparatus according to the present invention. This is “channel selection table information” that associates a broadcast frequency with a channel selection button, which is necessary for the reception device to select a frequency by operating a channel selection button. It is a flowchart which shows the flow of the matching table production | generation of broadcast frequency change date information and frequency information before change which concerns on this invention. It is an association table of the broadcast frequency change date / time information and the pre-change frequency information according to the present invention. It is a flowchart of the reception status message display operation by channel selection operation concerning the present invention.

A receiving apparatus according to an embodiment of the present invention, particularly a digital broadcast receiving apparatus, will be described with reference to FIGS. FIG. 1 is a configuration block diagram of a receiving apparatus, which includes an OFDM tuner 1, a DEMUX (DeMultiplexer) 2, an MPEG decoder 3, a video processing unit 4, a display unit 5, a CPU 6 as a determination unit and a processing unit, The storage unit includes a volatile memory 7 and a nonvolatile memory 8, and an infrared receiving unit 9, and is remotely operated by a remote controller 10. And
FIG. 2 is a table 100 showing correspondence between remote control channel selection buttons and frequencies.

  A signal flow and operation from broadcast signal reception to video display will be described with reference to FIGS. The CPU 6 is connected to the infrared receiving unit 9 and functions as a control unit and a determination unit for the entire receiving apparatus. The infrared receiving unit 9 receives an infrared signal based on the operation of the channel selection button of the remote controller 10. The infrared signal includes information indicating the channel selection button number. The CPU 6 receives information indicating the channel selection button number from the infrared receiver 9 and extracts a corresponding frequency in light of the table 100 stored in the nonvolatile memory 8. The CPU 6 sets the extracted frequency in the OFDM tuner 1 and receives a broadcast signal by performing channel selection. The OFDM tuner 1 digitally demodulates the OFDM signal, converts it into a TS (transport stream) signal, and inputs it to the DEMUX 2. In addition to decoding the TS signal into MPEG format data and outputting it to the MPEG decoder 3, the DEMUX 2 can extract data other than video and audio such as SI (System Information) information, SDTT (Software Download Trigger Table), and engineering services. The MPEG decoder 3 that has received the data in the MPEG format performs a decoding process to generate a video signal and inputs it to the video processing unit 4. The video processing unit 4 converts the video signal into a signal that can be displayed on the screen, and the video is displayed on the display unit 5. Note that the video processing unit 4 generates an OSD and superimposes it on a video signal according to an instruction from the CPU 6 as necessary.

  FIG. 3 is a flowchart showing the flow of generating a correspondence table between broadcast frequency change date / time information and pre-change frequency information according to the present invention.

  FIG. 4 is a correspondence table 200 of broadcast frequency change date / time information and pre-change frequency information according to the present invention.

  The flow of processing will be described step by step (hereinafter, step is abbreviated as “S”) based on FIGS. 3 and 4. In this process, necessary information is acquired by downloading frequency list change information. In addition, the download can acquire the identification information specifying the data of the subsequent engineering service and the transmission date by acquiring the SDTT transmitted first, and matches the identification information on the transmission date. It is implemented by acquiring engineering service data. The broadcast frequency change information is included only in the engineering service data, and the broadcast frequency change information includes pre-change frequency information and post-change frequency information. Further, the broadcast frequency change date / time information is included in both SDTT and engineering service data.

  In S11, the CPU 6 determines whether or not the module version has been changed based on the version number included in the SDTT sequentially transmitted from the broadcasting station. Here, it is assumed that the version number is changed when the frequency is changed, for example, when a broadcasting station opens in a certain area. When these versions are changed, it determines with YES and transfers to S12. If the version is not changed, it is determined as NO, and the process of S11 is repeated for SDTT transmitted thereafter.

  In the next S12, the CPU 6 determines whether the target area identification information included in the SDTT matches the receiver installation position information, or a neighboring area (for example, if the receiver is installed in Chiba Prefecture, Tokyo, Kanagawa Prefecture, etc. If it matches the target area identification information of the area where the broadcast signal can be received), the determination is YES, and the process proceeds to S13. Otherwise, it is determined NO, and the process proceeds to S11 again to monitor the SDTT version change.

  In S13, the CPU 6 acquires the broadcast frequency change date / time information included in the SDTT and the transmission date / time information to which the engineering service data is transmitted, stores it in the nonvolatile memory 8, and proceeds to S14. It is also possible to employ a configuration in which the broadcast frequency change date / time information included in the engineering service data is used without using the broadcast frequency change date / time information included in the SDTT. In this case, the broadcast frequency change date / time information included in the SDTT is used. It is not necessary to store date / time information.

  In the next S14, the CPU 6 acquires engineering service data based on the transmission date and time information stored in the nonvolatile memory 8, stores it in the volatile memory 7, and proceeds to S15.

  In S15, the CPU 6 acquires the pre-change frequency from the engineering service data stored in the volatile memory 7, extracts the channel selection button in light of the table 100, and associates the post-change frequency with the channel selection button. The table 100 is updated and stored in the nonvolatile memory 8, and the process proceeds to S16. Note that the updated table 100 is invalid at the time of channel selection processing at this point, and the conventional table 100 is used until the frequency repacking execution date and time arrives.

  Then, in the final S 16, the CPU 6 stores the combination information of the broadcast frequency change date / time information stored in the non-volatile memory 8 and the pre-change frequency information stored in the volatile memory 7 or the volatile memory 7. The table 200 is configured with information obtained by extracting and combining the broadcast frequency change date / time information and the pre-change frequency information from the engineering service data that has been stored, and stores the table 200 in the nonvolatile memory 8, and the process ends. By performing this process, the receiving device can acquire the frequency after the change in preparation for the frequency repacking, and at the same time, the viewer continues to receive the frequency before the change across the frequency repacking execution date and time. In this case, the table information used for notifying the reason for the incapability of receiving due to the generated frequency repacking is stored.

  Next, a process for displaying an unreceivable message on the border of frequency repacking when receiving and viewing at the frequency before the change will be described with reference to FIG.

  FIG. 5 is a flowchart of the reception status message display operation by the receiving apparatus channel selection operation according to the present invention.

  First, in S21, the CPU 6 executes a channel selection operation, sets a frequency in the OFDM tuner 1, and proceeds to S22. In next S22, the CPU 6 monitors the signal indicating the reception state from the OFDM tuner 1 and, if the reception is successful, determines YES and repeats the processing in S22 to continue monitoring. When reception is not successful, it determines with NO and transfers to S23.

  Furthermore, in S23, the CPU 6 compares the frequency set in S21 with the pre-change frequency information in the table 200, and if there is a matching pre-change frequency, it determines YES and proceeds to S24. If there is no matching frequency, it is determined as NO, and the process proceeds to S26. In S24, the CPU 6 compares the broadcast frequency change date and time with the broadcast frequency change date and time information associated with the pre-change frequency information matched in S23 and the current date and time held by the receiving device in comparison with the table 200. When it is after the change date in the information, it is determined as YES and the process proceeds to S25. If it is determined that the date is before the date of occurrence, the process proceeds to S26.

  In S25, the CPU 6 causes the video processing unit 4 to generate an OSD such as “The broadcasting frequency has been changed for this channel”, displays a message on the display unit 5, and proceeds to S22. In addition, as a means of continuing viewing after frequency repacking, general receivers have a frequency search function, which allows you to find the changed frequency. Or the like may be displayed to prompt the execution of the frequency search function.

  Further, when the frequency search function is executed, it is necessary to rewrite the frequency information in the table 100 to the changed frequency in order to correspond to the channel selection operation by the remote controller or the like. At this time, since the frequency information before the change in the table 200 is not referred to, it is deleted or invalidated so as not to cause a malfunction. In S26, the CPU 6 generates an OSD such as “cannot be received” by the video processing unit 4, displays a message on the display unit 5, and proceeds to S22. In S27, the CPU 6 monitors a signal indicating the reception state from the OFDM tuner 1. If the reception state is improved, the CPU 6 determines YES and proceeds to S28. If not improved, it is determined as NO, and the process of S27 is repeated.

  In this embodiment, an example in which a message is transmitted to the viewer by OSD has been described. However, other means may be a means for informing by a warning lamp or sound, and that frequency repacking has occurred or is left as it is. Needless to say, it is not limited to the transmission means and display contents as long as continuous viewing is not possible and necessary operations for continuous viewing can be transmitted to the viewer.

  As described above, it is possible to notify the viewer of the end of the broadcast at the conventional frequency at the timing of frequency repacking occurrence, so that the viewer can understand the reason for the reception failure and distinguish it from the failure of the receiving device or the broadcast accident. be able to.

  The receiving apparatus according to the present invention can be widely applied to all terrestrial digital broadcast receiving apparatuses and all digital cable broadcast receiving apparatuses.

1 OFDM tuner 2 DEMUX
3 MPEG decoder 4 Video processing unit 5 Display unit 6 CPU
7 Volatile memory 8 Nonvolatile memory 9 Infrared receiver 10 Remote control 100, 200 Table

Claims (3)

A receiving unit that has a storage unit that stores information transmitted by broadcast waves and a determination unit that performs determination processing using the information, and that receives broadcast waves,
The information transmitted by the broadcast wave includes broadcast frequency change date information and pre-change frequency information, and the broadcast frequency change date information and the pre-change frequency information are associated with each other in the storage unit after the frequency change date. Remembered,
The determination unit, when reception is impossible, determines whether the frequency information before the change and the frequency being selected match, and whether the current date and time is after the date and time of the broadcast frequency change date and time information,
A receiving apparatus that reports a reason for reception failure based on a determination result of the determination unit. The receiver has a frequency search function,
The receiving apparatus according to claim 1, wherein the necessity of the frequency search is notified to a viewer based on the determined result. The receiver has a frequency search function,
When the current date is after the broadcast frequency change date and the frequency search is executed, the broadcast frequency change date information and the pre-change frequency information stored in the storage unit are deleted or invalidated. The receiving apparatus according to claim 1 or 2.