JP2011010106A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiver conforming change information concerned with an acquired network in relation with a program guide.SOLUTION: The digital broadcast receiver is equipped with: a change information recording means which, when change information concerned with a network is included in a network information table, acquires time information for at least network change operation as the change information from the network information table and recording the acquired change information in a predetermined recording medium; a display instruction receiving means for receiving a display instruction of an electronic program guide based on program information; and a display means which, when the display instruction is received by the display instruction receiving means, displays a program guide of the electronic program guide based on the program information on a predetermined screen and displays time for the network change operation on the program guide based on the change information recorded in the recording medium.

Description

  The present invention relates to a digital broadcast receiving apparatus.

  As a digital broadcast receiving device that receives a digital broadcast signal and obtains a network information table (NIT) from the received digital broadcast signal, broadcast station information such as EPG that is always received and NIT in digital broadcast, etc. When it is determined that the number of broadcast services has decreased by referring to the broadcast service group table, the acquired EPG and broadcast station information are compared, and the broadcast service that has ceased to exist or the newly added broadcast A broadcast receiving apparatus that detects a service and deletes a broadcast service that no longer exists from the broadcast service group list or adds a newly added broadcast service to the list is known (Patent Document 1). reference.).

Also, the NIT periodically transmitted from the network is acquired, and service change information included in the NIT (information on services of other networks that are added, deleted, or changed after the present, and addition, deletion, or change) Information regarding the effective time when the service is valid) is compared with the service change information table, and if there is newly added service change information, a digital broadcast receiver that adds the information to the service change information table is known. (See Patent Document 2).
Further, there is known a metadata electronic display device that acquires metadata related to a program provided with broadcasting, and integrates the metadata into an EPG and displays the metadata on a screen (see Patent Document 3).

JP 2008-22047 A JP 2001-203948 A JP 2008-5282 A

  In the digital broadcasting standard, change information for notifying in advance that a change related to the network is performed is included in a part of the broadcast and is sent to the receiving device irregularly. The network change referred to here means, for example, a change in a frequency band used for broadcasting, a change in service contents, a multiplex addition / deletion, and the like. Conventionally, when such change information is sent from the broadcasting station side, the receiving device once displays the acquired change information on the television screen to inform the user of the contents of the change information. In the past, the change information acquired in this way was only displayed once when acquired, so that, for example, the user desires to confirm this change information in association with the actual schedule (program schedule) of the program broadcast. I could not respond to.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a digital broadcast receiving apparatus capable of confirming change information relating to an acquired network in association with a program guide.

In order to achieve the above object, the present invention is a digital broadcast receiving apparatus which receives a digital broadcast signal and obtains program information and NIT from the received digital broadcast signal, and the NIT includes change information regarding the network. If there is at least time information about the network change work as the change information from the NIT, the change information recording means for recording the acquired change information in a predetermined recording medium, and an electronic program guide based on the program information ( EPG) display instruction accepting means, and when the display instruction accepting means accepts the display instruction, the EPG program guide based on the program information is displayed on a predetermined screen, and the recording medium Based on the change information recorded in It is constituted and a display means for displaying on a set table.
According to the present invention, when the EPG program guide is displayed on the screen, the time for the network change work is also displayed on the program guide. Therefore, the user grasps the time for the network change work in association with the program schedule. can do.

  The change information recording means extracts the change start time information and the change work period information from the descriptor for notifying the change of the network included in the NIT as the change information. Recording on the recording medium, and the display means specifies the network change work time zone based on the change start time information and the change work period information, and displays the program indicating the specified time zone. It may be performed on the table. More specifically, the display means may display a rectangle indicating the specified time zone so as to overlap the program table.

  Further, when the current time corresponds to the network change work time zone, the display means displays a predetermined warning at a position corresponding to the network change work time zone in the program guide. Alternatively, based on the information on the change start time, the start time of the change work may be displayed at a position corresponding to the time zone of the network change work in the program guide.

  Further, the display means may display a predetermined warning when at least a part of the time zone of the program selected on the program guide conflicts with the time zone of the network change work. Information regarding each program may not be displayed in an area in the program guide corresponding to a time zone after the start time of the change work.

  Further, the change information recording means extracts the change type information from the descriptor notifying the change of the network included in the NIT as the change information, records the extracted information on the recording medium, and The display means may display a type regarding the network change work on the program table based on the change type information. Further, the change information recording means extracts, as the change information, a message relating to a network change from a descriptor for notifying a message included in the NIT, and records the extracted message on the recording medium, The display means may display a message on the network change work on the program guide based on the recorded message.

  The technical idea of the present invention can be realized by means other than a digital broadcast receiving apparatus. For example, it is possible to grasp an invention of a method including processing steps executed by each configuration of the apparatus, and an invention of a computer-readable program that causes the apparatus to realize a function executed by each configuration of the apparatus. Furthermore, a digital broadcast receiving apparatus that receives a digital broadcast signal and acquires program information and NIT from the received digital broadcast signal, and a descriptor for notifying the NIT of a network change and a description for notifying the message When a child is included, as change information about the network, description of notification of change start time information, change work period information, change type information, and the above message from the descriptor notifying the change of the network A message ID for associating with a child is extracted and a message relating to a network change is extracted from a descriptor for notifying the message associated with the message ID, and the change information is extracted each time the change information is extracted. Change start time information, change work period information and change type Change information recording means for adding change information consisting of a combination of information and a message relating to the change of the network to the recording medium without erasing the previously acquired change information recorded on the predetermined recording medium; and A display instruction accepting unit for accepting an EPG display instruction based on the program information; and when the display instruction is accepted by the display instruction accepting unit, an EPG program guide based on the program information is displayed on a predetermined screen. , A rectangle indicating the time zone for each network change work specified based on the change start time information and the change work period information for each change information recorded on the recording medium, and the color for each network change work If the current time corresponds to the time zone of the network change work, a rectangle with a different Displays a warning indicating that the program cannot be viewed at the position corresponding to the network change work time zone corresponding to the current time in the program table, and starts changing each change information. Based on the time information, the change work start time is displayed at a position corresponding to the network change work time zone after the current time in the program guide, and the program time zone selected on the program guide is displayed. If at least a part of the program conflicts with the network change work time zone, a warning is displayed to indicate that at least a part of the selected program cannot be viewed, and after the network change work start time In the area in the program guide corresponding to the time zone, information regarding each program is not displayed, and the network change work is performed based on the change type information for each change information. Is displayed at a position on the program guide corresponding to the time zone of each change work, and based on the message for each change information, the message related to the network change work is a program corresponding to the time zone of each change work. A configuration including display means for displaying at a position on the table can also be grasped as one invention.

It is the block diagram which showed schematic structure of the liquid crystal television. It is the figure which showed an example of the screen which linked | related and showed the change information of the network with the program guide of EPG.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration of a liquid crystal television (liquid crystal TV) 10 according to the present embodiment. The liquid crystal TV 10 corresponds to an example of a digital broadcast receiver. The liquid crystal TV 10 generally includes a front end processing circuit 11, a decoding processing circuit 12, a microcomputer 13, a real time clock (RTC) 14, a liquid crystal panel 15, a remote control I / F 16, and a liquid crystal panel driving circuit 17. The backlight 19 and the backlight drive circuit 20 are included.

The backlight 19 is disposed on the back side of the liquid crystal panel 15 and irradiates the liquid crystal panel 15 from the back side. Under the control of the microcomputer 13, the backlight drive circuit 20 turns on / off the backlight 19 and adjusts the brightness at the time of lighting.
The front end processing circuit 11 functions as a tuner that receives a television broadcast signal via the antenna 11a. In the present embodiment, the front-end processing circuit 11 receives a digital broadcast signal of a predetermined standard (for example, a digital broadcast signal according to the European digital broadcast standard) as a radio wave having a frequency of a designated channel, and the received broadcast signal. Is converted into an intermediate frequency signal, the intermediate frequency signal as an analog signal is converted into a digital signal, and a transport stream (TS) is extracted from the digital signal. The front end processing circuit 11 outputs the extracted TS to the decoding processing circuit 12.

  The digital broadcast signal received by the front-end processing circuit 11 may be a terrestrial digital broadcast signal or a satellite digital broadcast signal. Further, the front-end processing circuit 11 may extract a TS by receiving a signal related to IP broadcasting by connecting to an IP (Internet Protocol) network, or may perform digital cable television (CATV) broadcasting via a cable. You may receive and extract TS from the received digital CATV broadcast.

  The decoding processing circuit 12 includes a descrambling circuit, a demultiplexing circuit, a decoding circuit, an image processing circuit, an OSD (on-screen display) circuit 12a, and the like, and descrambles the TS by the descrambling circuit. The descrambled TS is composed of a plurality of transport packets, and each transport packet stores various data such as a video signal, an audio signal, and SI (Service Information). The demultiplex circuit extracts a video signal and an audio signal relating to a channel designated by the user from the TS.

  The video signal and audio signal extracted from the TS are in a state of being encoded (encoded) according to the MPEG standard, and the decoding circuit decodes (decodes) the video signal and audio signal according to the MPEG standard. The image processing circuit performs various types of image processing such as scaling processing, color correction processing, and edge enhancement processing according to the number of pixels of the liquid crystal panel 15 on the decoded video signal, and represents an image for one screen. Generate a video signal. The decoding processing circuit 12 outputs the generated video signal to the liquid crystal panel driving circuit 17 via the OSD circuit 12a. The OSD circuit 12a generates an OSD signal corresponding to various displays based on data such as a control signal and character information input from the microcomputer 13, and superimposes the OSD signal on the video signal or only the OSD signal. Can be output to the liquid crystal panel drive circuit 17.

  The liquid crystal panel driving circuit 17 temporarily stores the video signal (including the OSD signal) input from the decoding processing circuit 12 in a predetermined frame memory, and outputs the stored signal to the liquid crystal panel 15 at a predetermined timing. Thus, each pixel of the liquid crystal panel 15 constituted by the pixel arrangement is driven, and an image based on the video signal is displayed on the liquid crystal panel 15.

  The remote control I / F 16 receives signals of various instructions (for example, a channel selection instruction, a menu screen display instruction, etc.) issued from a remote controller (not shown) outside the liquid crystal TV 10 based on a user operation. . The microcomputer 13 performs processing and control according to the instruction signal input via the remote control I / F 16. Although not shown in the figure, the liquid crystal TV 10 is a TV, such as an audio signal circuit for outputting audio based on the decoded audio signal, a speaker, and a power supply circuit for supplying driving power to each part of the liquid crystal TV 10. Each of the general configurations is provided.

  In such a configuration, when the received digital broadcast signal includes change information regarding the network, the liquid crystal TV 10 acquires the change information and records it on a predetermined recording medium each time. Here, the acquisition and recording process of the change information by the microcomputer 13 will be described. The microcomputer 13 instructs the decoding processing circuit 12 to acquire the NIT as SI from the TS in the course of the above processing by the decoding processing circuit 12. When the NIT includes a descriptor for notifying a network change and a descriptor for notifying a message, predetermined change information regarding the network is extracted from these descriptors (descriptors). For example, according to the European digital broadcasting standard (see ETSI EN 300 468), network_change_notify_descriptor is defined as a descriptor for notifying a network change as a kind of information included in the NIT, and as a descriptor for notifying a message. message_descriptor is specified.

  Therefore, when the network_change_notify_descriptor is obtained from the NIT, the microcomputer 13 acquires start_time_of_change, change_duration, change_type, and message_id from the network_change_notify_descriptor. start_time_of_change is information indicating the start time of the network change work (change process), change_duration is information indicating the change work period (the length of time required for the change work), change_type is information indicating the change type, and message_id Is an ID for associating with message_descriptor, and these are all defined as information included in network_change_notify_descriptor in the European digital broadcasting standard. The change_type represents the type of network change work (for example, change of frequency band used for broadcasting, change of service contents, addition / deletion of multiplex, etc.). Further, the microcomputer 13 acquires text_char (message) from the message_descriptor having the same message_id as the message_id. message_id and text_char are also defined as information included in the message_descriptor in the European digital broadcasting standard. The text_char is a character string for displaying a message related to the network change (message to be notified to the viewer when the network is changed).

  The microcomputer 13 stores a set of change information including start_time_of_change, change_duration, change_type, and text_char (message) regarding a certain change work of the network acquired (extracted) from each descriptor as described above in a predetermined memory (recording medium). ) Record in 13a. At this time, the microcomputer 13 additionally records the newly acquired change information in the memory 13a without deleting the previously acquired change information recorded in the memory 13a. As described above, the microcomputer 13 acquires the change information from the NIT when the NIT includes the change information regarding the network, and adds the change information to the memory 13a and records the change information every time the change information is acquired. It can be said that it functions as a recording means.

  The microcomputer 13 instructs the decoding processing circuit 12 to extract program information as SI from the TS in the course of the above processing by the decoding processing circuit 12. As the program information, for example, an EIT (Event Information Table) describing information related to a program such as a title of each event (program), broadcast date and time, contents description, and the like is applicable. The microcomputer 13 records the extracted program information in the memory 13a.

  Next, a case where the liquid crystal TV displays an EPG program guide on the screen in accordance with a user instruction will be described. The user can display the EPG program guide on the liquid crystal TV 10 by operating the remote controller. That is, when the microcomputer 13 receives a program guide display instruction from the remote controller via the remote control I / F 16, the EPG screen is displayed on the OSD circuit 12a based on program information such as EIT recorded in the memory 13a. Image data (OSD signal) representing (program guide) is generated, and the OSD circuit 12 a outputs the generated OSD signal to the liquid crystal panel drive circuit 17. As a result, the program guide is displayed on the liquid crystal panel 15. Thus, it can be said that the liquid crystal TV 10 includes a display instruction receiving unit in that it can receive a display instruction of the electronic program guide.

  However, in the present embodiment, when the microcomputer 13 controls the OSD circuit 12a and the liquid crystal panel drive circuit 17 to display the EPG program guide on the screen on the liquid crystal panel 15, the microcomputer 13 does not simply display based on the program information. Based on the change information recorded in the memory 13a, various information about the network change work is displayed in association with the program guide. In other words, the liquid crystal TV 10 displays the time for the network change work on the program guide based on the change information recorded in the memory 13a when the display instruction receiving means receives the display instruction of the electronic program guide. Functions as a means.

FIG. 2 illustrates an EPG program table displayed on the liquid crystal panel 15 based on the OSD signal generated by the OSD circuit 12a. In FIG. 2, a program table 30 displaying the contents (titles and the like) of each program for each channel number in time series is displayed.
In the program guide 30, rectangles 30a and 30b indicating the time zone of network change work are displayed in an overlapping manner. In FIG. 2, the rectangles 30 a and 30 b are each surrounded by a one-dot chain line. That is, the OSD circuit 12a specifies the time zone for network change work for each change work based on start_time_of_change (change start time) and change_duration (change work period) for each change information recorded in the memory 13a. Thus, an EPG image in which the rectangles 30 a and 30 b indicating the specified time zones are superimposed on the program guide 30 is generated and displayed on the liquid crystal panel 15. The OSD circuit 12a displays the rectangles 30a and 30b for each network change operation in different colors. Therefore, the user who has seen the program guide 30 displayed on the liquid crystal panel 15 can grasp when the network change work is executed in relation to the program schedule in the program guide 30.

  Further, in the program guide 30, when the current time corresponds to the time zone of the network change work, a predetermined warning display 30c is performed at a position corresponding to the time zone of the network change work in the program guide 30. ing. Specifically, the OSD circuit 12a determines that the current time confirmed by the RTC 14 or the like corresponds to any network change work time period specified based on start_time_of_change and change_duration for each change information. Then, an image for displaying a warning display 30c indicating that the program cannot be viewed is generated at a predetermined position in a rectangle (for example, rectangle 30a) indicating the time zone of the change work, and is displayed on the liquid crystal panel 15. . Although the content of the warning display 30c is not particularly limited, for example, a display such as “Currently changing work is in progress and services cannot be received from 9:30 to 10:00” can be considered. Therefore, the user who has viewed the program guide 30 displayed on the liquid crystal panel 15 immediately determines whether or not the current time corresponds to the network change work time zone, and if the current program cannot be viewed, immediately Can grasp.

  In addition, the OSD circuit 12a, based on start_time_of_change, change_type (change type), and text_char (message) for each change information recorded in the memory 13a, the position corresponding to the time zone of the network change work (the time of the change work) An image for displaying the change start time 30d, the change type 30e, and the message 30f regarding the change work is generated in a rectangle indicating the band (for example, a predetermined position in the rectangle 30b) and displayed on the liquid crystal panel 15. Therefore, the user who has viewed the program guide 30 displayed on the liquid crystal panel 15 has a start time, a change type (for example, addition of a multiplex), and a message (for example, a change work) regarding a network change work scheduled in the future. Messages such as “Please execute auto search”).

  Further, the liquid crystal TV 10 displays a predetermined warning display 30h when at least a part of the time zone of the program selected by the user on the EPG program guide 30 conflicts with the network change work time zone. In the program guide 30, the user can arbitrarily select a program by moving a cursor in the screen by operating a remote controller or the like. In FIG. 2, the program selected by the user with the cursor is indicated by a thick frame 30g. As described above, when a certain program is selected on the program guide 30, and at least a part of the time zone of the selected program overlaps with one of the rectangles 30a and 30b indicating the time zone of the network change work, As shown in FIG. 2, the OSD circuit 12a generates an image for displaying a warning display 30h indicating that the selected program cannot be viewed after the time when the network change work starts, and displays the image on the liquid crystal panel 15. Display. In other words, the display content at the position of the warning display 30h changes as needed in conjunction with the movement of the cursor operated by the user on the program guide 30.

  Further, in the liquid crystal TV 10, information regarding each program may not be displayed in an area in the program guide 30 corresponding to a time zone after the start time of the network change work. That is, as shown in FIG. 2, among the programs in the program guide 30, the program information for the entire program after the network change work start time (after 9:30, which is the start time of the rectangle 30 a) Do not display information (titles, etc.) about these programs based on. This is because, when the network is changed, it is uncertain whether the program having the contents according to the program information acquired before the network change is actually broadcast. By doing so, it is possible to prevent a user who has seen the EPG program guide 30 from being confused by indefinite program information in the time zone after the start of the network change work.

  As described above, according to the present embodiment, the liquid crystal TV 10 includes a descriptor (network_change_notify_descriptor) for notifying the NIT acquired from the received digital broadcast signal and a descriptor (message_descriptor) for notifying the message. If there is a network_change_notify_descriptor, start_time_of_change (change start time), change_duration (change work period), change_type (change type) are obtained from the network_change_notify_descriptor, and a message is obtained from the message_descriptor. Is recorded in the memory 13a, the change information consisting of the acquired start_time_of_change (change start time), change_duration (change work period), change_type (change type) and message, and the EPG program table 30 from the user. There is a display instruction In this case, based on the change information stored in the program information and the memory 13a of the EIT, etc., it was displayed on the liquid crystal panel 15 in association with a variety of information about the network change work program guide. In other words, information on the time zone when the network change work is performed, the type of network change, a message to be notified to the viewer when the network is changed, and the like are displayed in association with the program schedule of the program guide 30. The user can easily and in detail know the network change work schedule in association with the program schedule.

DESCRIPTION OF SYMBOLS 10 ... Liquid crystal television, 11 ... Front end processing circuit, 12 ... Decoding processing circuit, 12a ... OSD circuit, 13 ... Microcomputer, 13a ... Memory, 14 ... Real time clock, 15 ... Liquid crystal panel, 16 ... Remote control I / F , 17 ... Liquid crystal panel drive circuit, 19 ... Backlight, 20 ... Backlight drive circuit, 30 ... Program guide, 30a, 30b ... Rectangular, 30c, 30h ... Warning display, 30d ... Change start time, 30e ... Change type, 30f ... message, 30g ... bold frame

Claims (10)

A digital broadcast receiving apparatus that receives a digital broadcast signal and acquires program information and a network information table from the received digital broadcast signal,
When the network information table includes change information regarding the network, at least time information about the network change work is acquired from the network information table as the change information, and the acquired change information is recorded on a predetermined recording medium. Change information recording means;
Display instruction receiving means for receiving a display instruction of an electronic program guide based on the program information;
When the display instruction is received by the display instruction receiving unit, the program guide of the electronic program guide based on the program information is displayed on a predetermined screen, and the program guide is displayed based on the change information recorded on the recording medium. A digital broadcast receiving apparatus comprising: display means for displaying a time concerning network change work on the program guide. The change information recording means extracts the change start time information and the change work period information from the descriptor for notifying the change of the network included in the network information table as the change information. Information is recorded on the recording medium,
The display means specifies the network change work time zone based on the change start time information and the change work period information, and displays the specified time zone on the program table. The digital broadcast receiver according to claim 1.   3. The digital broadcast receiving apparatus according to claim 2, wherein the display means displays a rectangle indicating the specified time zone so as to overlap the program guide.   When the current time corresponds to the network change work time zone, the display means displays a predetermined warning at a position corresponding to the network change work time zone in the program guide. The digital broadcast receiver according to claim 2 or 3, characterized in that   The said display means displays the start time of the said change work in the position applicable to the time zone of the network change work in the said program schedule based on the information of the said change start time. Item 5. The digital broadcast receiver according to any one of Items 4 to 6.   3. The display unit according to claim 2, wherein a predetermined warning is displayed when at least a part of a time zone of the program selected on the program guide conflicts with a time zone of the network change work. The digital broadcast receiver according to claim 5.   7. The display unit according to claim 2, wherein the display means does not display information related to each program in an area in the program guide corresponding to a time zone after the start time of the network change work. The digital broadcast receiver described in 1. The change information recording means extracts, as the change information, change type information from a descriptor for notifying a network change included in the network information table, and records the extracted information on the recording medium.
8. The digital broadcast receiving according to claim 1, wherein the display means displays the type of the network change work on the program guide based on the change type information. apparatus. The change information recording means extracts, as the change information, a message related to a network change from a descriptor for notifying a message included in the network information table, and records the extracted message on the recording medium. ,
9. The digital broadcast receiving apparatus according to claim 1, wherein the display means displays a message regarding the network change work on the program guide based on the recorded message. . A digital broadcast receiving apparatus that receives a digital broadcast signal and acquires program information and a network information table from the received digital broadcast signal,
When the network information table includes a descriptor for notifying a network change and a descriptor for notifying a message, the change information about the network is changed from the descriptor notifying the network change to the change start time. For extracting information, information on change work period, change type information, and message ID for associating the descriptor for notifying the message and notifying the message associated with the message ID Each time a change message is extracted from the descriptor, a change consisting of a combination of the change start time information, change work period information, change type information, and network change message is extracted. Information recorded in the past on a specified recording medium A change information recording means for recording in addition to the recording medium without erasing the acquired change information,
Display instruction receiving means for receiving a display instruction of an electronic program guide based on the program information;
When the display instruction is received by the display instruction receiving means,
While displaying the program guide of the electronic program guide based on the program information on a predetermined screen,
A rectangle indicating the time zone for each network change work specified based on the information on the change start time and the change work period information for each change information recorded in the recording medium, and the color for each network change work Display different rectangles superimposed on the above program guide,
If the current time corresponds to the network change work time zone, the program cannot be viewed at the current time in the program table at the position corresponding to the network change work time zone. A warning message to the effect that
Based on the information on the change start time for each change information, the start time of the change work is displayed at a position corresponding to the time zone of the network change work after the current time in the program guide,
When at least a part of the time zone of the program selected on the program guide violates the network change work time zone, a warning display that at least a part of the selected program becomes unviewable Do
In the area in the program table corresponding to the time zone after the network change work start time, information about each program is not displayed,
Based on the change type information for each change information, the type of the change work of the network is displayed at the position on the program guide corresponding to the time zone of each change work,
Based on the message for each change information, a display means for displaying a message regarding the change work of the network at a position on the program guide corresponding to the time zone of each change work;
A digital broadcast receiving apparatus comprising:

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