JP2006319573A - Broadcast receiving device and video equipment device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video system comprising a broadcast receiving device and a video equipment device, the video system being characterized in that the broadcast receiving device outputs a partial TS generated by converting a full TS to the video equipment device and an automatic display message can be displayed on the video equipment device. <P>SOLUTION: The broadcast receiving device 1 converts the full TS received by a tuner section 101 into the partial TS by a stream analysis section 102 by extracting only specified TS packets and separates message information related to the automatic display message from the full TS. A message information generation section 103 converts the message information to UPnP representation, and the partial TS generated by the stream analysis section 102 and the message information converted to the UPnP representation are transmitted from a communication section 104 to a TV as the video equipment device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a broadcast receiving apparatus that receives a digital broadcast, a video equipment apparatus that receives video data from the broadcast receiving apparatus, and the video equipment apparatus.

  In recent years, BS digital broadcasts and terrestrial digital broadcasts have started, and digital broadcast receivers that receive digital broadcasts are becoming widespread. In digital broadcasting, a plurality of video data and a plurality of audio data are encoded based on the MPEG2 (Moving Picture Experts Group 2) system, and a plurality of video streams and a plurality of audio streams, which are the encoding results, are transmitted from the broadcasting station. A transport stream (Transport Stream, hereinafter referred to as TS) obtained by time division multiplexing is broadcast. Hereinafter, a TS obtained by receiving a digital broadcast is referred to as a full TS.

  In addition to the video stream and the audio stream, an automatic display message can be multiplexed in the full TS. Details of the automatic display message are described in Non-Patent Document 1, for example. The automatic display message is displayed on the display screen after being synthesized with the video by the video stream (see, for example, Patent Document 1).

The digital broadcast receiving apparatus receives a full TS, extracts predetermined TS packets from a plurality of video streams and a plurality of audio streams included in the full TS, and has a format that enables communication according to the IEEE 1394 standard. A partial TS (Partial Transport Stream, hereinafter referred to as a partial TS) is generated and output.
JP 2003-283999 A "BS / Broadband CS digital broadcasting operation regulation technical data (ARIB TR-B15)" (Radio Industry Association)

  However, according to the IEEE 1394 standard, the partial TS does not include an EMM (Entitlement Management Message) that is information related to the automatic display message. That is, when the digital broadcast receiving apparatus outputs a partial TS to an external device, the external device cannot display an automatic display message.

  The method described in Patent Document 1 combines a video stream image and an automatic display message and outputs them to a monitor, which outputs video data on which the automatic display message is superimposed, and outputs as a partial TS. It is not considered. In addition, it is conceivable to output the video data on which the automatic display message is superimposed as a partial TS again. In this case, the partial TS is once decoded, and then the automatic display message is synthesized and encoded again into the partial TS. Therefore, the image quality may be deteriorated.

  Accordingly, the present invention provides a video system comprising a broadcast receiving device and a video equipment device, wherein the broadcast receiving device outputs a partial TS converted from a full TS to the video equipment device and causes the video equipment device to display an automatic display message. An object of the present invention is to provide an image system that can

  In order to achieve the above object, a broadcast receiving apparatus of the present invention includes a receiving means for receiving a transport stream of a desired channel from digital broadcasting, and a partial transport stream from the transport stream received by the receiving means. A stream analyzer that separates message information from the transport stream, the partial transport stream created by the stream analyzer, and the message information separated by the stream analyzer And a transmission means for transmitting to.

  The video equipment of the present invention includes a partial transport stream obtained by converting a transport stream of digital broadcasting and message information separated from the transport stream from a broadcast receiving device, and receiving by the receiving unit. And a display means for displaying a video based on the partial transport stream and a message based on the message information on a display screen.

  According to the present invention, in a video system composed of a broadcast receiving device and a video equipment device, the broadcast receiving device outputs a partial TS converted from a full TS to the video equipment device and displays an automatic display message on the video equipment device. It is possible to provide a video system that can be operated.

  The broadcast receiving apparatus and video equipment apparatus of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration example of a video system in which a broadcast receiving apparatus according to a first embodiment of the present invention and a TV and a PC (Personal Computer) that are the first embodiment of the video equipment apparatus of the present invention are used. . The TV 2 (video equipment device, other equipment) and the PC 3 (video equipment device, other equipment) are connected to the broadcast receiving apparatus 1. As this connection method, for example, a wired or wireless LAN (Local Area Network), IEEE 1394, or the like can be considered. In the following description, a LAN is used. Since the TV 2 and the PC 3 have the same configuration and operate in the same manner, the broadcast receiving apparatus 1 and the TV 2 will be described in the following description.

  The broadcast receiving apparatus 1 receives a full TS by digital broadcasting, converts it into a partial TS, and transmits it to the TV 2. Further, message information related to the automatic display message can be transmitted to the TV 2 separately from the partial TS, and the automatic display message can be displayed on the TV 2.

  FIG. 2 is an example of a display screen displaying an automatic display message. In this example, an automatic display message 2a “Please contact the service center” is displayed at the lower left of the screen.

  FIG. 3 is a diagram illustrating a configuration of the broadcast receiving apparatus 1. The broadcast receiving apparatus 1 includes a tuner unit 101 (reception unit), a stream analysis unit 102 that converts a full TS output from the tuner unit 101 into a partial TS and separates EMM information that is message information, and UPnP from the EMM information. A message information generation unit 103 (message information conversion unit) that creates message information of expression, a communication unit 104 (transmission means) that communicates with the TV 2, and a channel of a stream that is output from the tuner unit 101 based on a request from the TV 2 A stream selection unit to select.

  The tuner unit 101 receives a digital broadcast from a broadcast station, and outputs a full TS of the channel selected by the stream selection unit 105. More specifically, the RF signal is converted into a baseband signal, subjected to digital demodulation and decoding, and a desired full TS is extracted from the digital signal stream. Not only video data and audio data, but also information related to automatic display messages is sent in the form of EMM. The EMM information will be described later.

  The stream analysis unit 102 has a function of receiving a full TS from the tuner unit 101, extracting only a predetermined TS packet from the TS, and converting it into a partial TS. The created partial TS is transferred to the communication unit 104 and transmitted from the communication unit 104 to the TV 2. The stream analysis unit 102 also separates EMM information that is message information related to the automatic display message, and passes this to the message information generation unit 103.

  The message information generation unit 103 receives EMM information from the message information generation unit 103, and generates message information in an XML (Extensible Markup Language) format supported by UPnP (Universal Plug and Play) based on the EMM information. The message information created here will be described in detail later.

  The communication unit 104 has a function of receiving the partial TS generated by the stream analyzing unit 102 and the message information generated by the message information generating unit 103 and transmitting the message information to the TV 2. Also, it receives a stream acquisition request from the TV 2 and outputs it to the stream selection unit 105. The stream selection unit causes the tuner unit 101 to output a full TS corresponding to this request.

  FIG. 4 is a diagram illustrating the configuration of the TV 2. The TV 2 includes a communication unit 201 (reception unit) that communicates with the broadcast receiving device 1, a stream processing unit that decodes the partial TS received by the communication unit 201 and converts it into video data, and message information received by the communication unit 201. A message information processing unit 203 to be processed, a timer 204 (timer) for measuring an elapsed time after the start of partial TS reception, a message display unit 205 for displaying an automatic display message, and video data obtained by combining the automatic display message A video composition unit 206 (display means) to be created, a display screen 207, and a stream request unit 208 that creates a stream acquisition request to be transmitted to the broadcast receiving apparatus 1 are configured.

  The communication unit 201 is a communication interface for communicating with the communication unit 104 of the broadcast receiving apparatus 1 as described above. The communication unit 201 receives a partial TS and message information from the broadcast receiving apparatus 1 and transmits a request for acquiring a partial TS of a channel desired to be received.

  The stream processing unit 202 decodes the partial TS received by the communication unit 201, converts it into a video data form, and passes it to the video composition unit 206. In addition, the timer 204 is notified that reception of the partial TS has started, and the timer 204 starts measurement of the elapsed time after reception.

  The message information processing unit 203 processes the message information described in UPnP expression received by the communication unit 201. Of the information described in the message information, information about the message code and display position of the automatic display message is passed to the message display unit 205, and information about the timing for displaying the automatic display message is passed to the timer 204.

  The timer 204 receives a partial TS reception start notification from the stream processing unit 202, and measures an elapsed time after the start of reception. Also, the information about the display timing for displaying the automatic display message is received from the message information processing unit 203, and the message display unit 205 is notified of the timing for displaying the automatic display message based on this and the elapsed time after the start of reception.

  The message display unit 205 receives data related to the automatic display message to be displayed from the message information processing unit 203, creates an automatic display message to be displayed on the display screen 207, and displays the automatic display message at the timing received from the timer 204. It outputs to 206.

  The video composition unit 206 synthesizes the video data output from the stream processing unit 202 and the automatic display message output from the message display unit 205, and outputs a video signal to the display screen 207.

  FIG. 5 is a diagram schematically showing a tuner expression used when the broadcast receiving apparatus 1 presents information necessary for channel selection to the TV 2. An element “Channel Item” representing each channel is arranged in an element indicating the tuner unit 101 “Tuner Container” (represented by the title attribute “Tuner 1” in the example of FIG. 5). In the example of FIG. 5, each Channel Item element indicates a program title currently being broadcast in addition to a channel number and a channel name. In the example of FIG. 5, three items are provided, the first item is “News”, the channel number is “1”, the channel name is “NNN TV”, and the second item is “Baseball” ", The channel number is" 5 ", the channel name is" TTT TV ", the third item is" Variety ", the channel number is" 9 ", and the channel name is" FFF TV ".

  FIG. 6 is a specific implementation example of the tuner expression shown in FIG. The tuner expression is expressed according to the XML format defined by UPnP. In the example of FIG. 6, one container element (corresponding to the Tuner Container element in the example of FIG. 5) and three item elements (corresponding to the Channel Item element in the example of FIG. 5) are provided in parallel. An id attribute is placed on each of the four elements, and is used for identifying each element. In the example of FIG. 6, “Tuner1” is assigned to the id attribute of the container element, and “Tuner1 / NNN”, “Tuner1 / TTT”, and “Tuner1 / FFF” are assigned to the id attributes of the three item elements.

  Each item element is provided with a parentID attribute to express the hierarchical relationship between the container and the item. In this example, since all of the parentID attributes of each item element are described as “Tuner1”, it can be seen that each item exists under the Tuner1 container.

  Containers and items belong to some class, and the supported functions differ depending on which class they belong to. This class is described in an upnp: class element provided as a child element of each container element and item element. In the example of FIG. 6, “object.container” is the child element of the container element and “object.container” is the child element of the item element, and “object.item.videoItem.videoBroadcast” is the child element of the item element. It is described.

  Each item is provided with a resource for stream output. By accessing this item, the TV 2 can select a channel in the tuner unit 101 and acquire a stream. This resource is described as a res element that is a child element of the item element. In the example of FIG. 6, “http://192.168.0.1/Tuner1/NNN.mpg” and “http: //”, respectively. 192.168.0.1/Tuner1/TTT.mpg ”and“ http://192.168.0.1/Tuner1/FFF.mpg ”. In the res element, information on a protocol when each stream is acquired is also expressed as a protocolInfo attribute. In the example of FIG. 7, “http-get: *: video / mpge: *” is described in the attribute. .

  The program title, channel number, and channel name of each item are also described as a dc: title element, an upnp: channelNr element, and an upnp: channelName element, which are child elements of the item element.

  FIG. 7 is a diagram illustrating a specific example of EMM information that is message information regarding an automatic display message received by the tuner unit 101 and separated by the stream analysis unit 102. The EMM information includes a message code body presented to the user (described in the item “message_area”), a broadcasting entity identification number (described in the item “ca_broadcaster_group_ID”), and an automatic display erasure type (item “selection status”). ), Automatic display duration (described in items “displaying_duration1”, “displaying_duration2”, “displaying_duration3”), automatic display count (described in item “displaying_cycle”), and the like. ing.

  If 0x00 is assigned as the automatic display erasure type, it can be erased by the user's operation. If 0x01 is assigned, it cannot be erased by the user's operation. At 0x02, the displayed automatic display message is forcibly erased.

  The automatic display duration will be described with reference to FIG. The automatic display duration 1, the automatic display duration 2, and the automatic display duration 3 describe the timing for switching between display and non-display of the automatic display message. Assuming that the time T1, T2, and T3 are assigned to the automatic display duration 1, the automatic display duration 2, and the automatic display duration 3, respectively, as shown in FIG. The display message is hidden, and then the automatic display message is displayed for T2, and then the automatic display message is not displayed for T3. The combination of the three periods T1 to T3 is one turn, and the automatic display message is displayed as many times as described in the automatic display count.

  FIG. 9 is a diagram illustrating an example of UPnP expression message information obtained by converting the information of the automatic display message based on the EMM information by the message information generation unit. Here, the automatic display message is described as a foo: autoMessage element, and the message code of the automatic display message described in the message_area item of the EMM information below (in the example of FIG. 9, “Please contact the service center (0120-XXX -XXX) ").

  The foo: autoMessage element includes a status attribute that describes information related to the automatic display erasure type, a cycle attribute that describes information related to the automatic display count, information related to automatic display duration 1, automatic display duration 2, and information related to automatic display duration 3. Has a duration attribute. If the status attribute is 0, it can be deleted by the user's operation. If it is 1, the user cannot delete it by the user's operation. If it is 2, the automatic display message is deleted. The duration attribute is described by separating the above-described values of T1, T2, and T3 by “,”.

  In this example, the display position of the automatic display message can be set by the position attribute. For example, if “2” is assigned to the position attribute, it is used by a method of displaying an automatic display message in the lower left.

  Next, processing related to the automatic display message will be described with reference to FIGS. FIG. 10 is a flowchart showing a processing flow of the broadcast receiving apparatus 1 related to transmission of message information related to the automatic display message.

  First, the broadcast receiving apparatus 1 receives a stream acquisition request from the TV 2 by the communication unit 104 (S901). This request includes information regarding a channel number or the like desired to be received. When receiving the stream acquisition request, the broadcast receiving apparatus 1 switches the channel received by the tuner unit 101 and receives message information regarding the automatic display message from the broadcast station by the tuner unit 101 (S902). As described above, this is transmitted from the broadcast station in the EMM format shown in FIG. Further, the broadcast receiving apparatus 1 separates the message information from the video data, the audio data, and the like by the stream analysis unit 102, and converts it into UPnP representation by the message information generation unit 103 (S903). As described above, this UPnP expression is described in a format as shown in FIG. 9, for example.

  Furthermore, the broadcast receiving apparatus 1 transmits a notification that the message information has changed from the communication unit 104 to the TV 2 (S904). If the communication unit 104 receives a message information acquisition request as a response from the TV 2 (S905), the broadcast receiving apparatus 1 transmits the message information converted into the UPnP expression by the message information generation unit 103 to the TV 2 (S906). ).

FIG. 11 is a flowchart showing the flow of processing of the TV 2 related to the elapsed time measurement after stream reception.
The TV 2 creates a stream acquisition request by the stream request unit 208 in response to, for example, a user channel selection by the remote controller, and transmits it to the broadcast receiving apparatus 1 from the communication unit 201 (S1001). If the communication unit 201 starts receiving a stream from the broadcast receiving apparatus 1 in response to the acquisition request (S1002), the TV 2 detects this by the stream processing unit 202 and notifies the timer 204, and the timer 204 displays the elapsed time. Is started (S1003).

FIG. 12 is a flowchart showing the processing flow of the TV 2 for receiving message information and displaying / hiding automatic display messages.
The TV 2 receives the message information change notification transmitted from the broadcast receiver 1 in S904 of FIG. 10 at the communication unit 201, and transmits a message information acquisition request from the communication unit 201 to the broadcast receiver 1 ( In response to this, message information transmitted from the broadcast receiving apparatus 1 is received by the communication unit 201 (S1102). The message information received by the communication unit 201 is passed to the message information processing unit 203, information about the message code and display position of the automatic display message is passed to the message display unit 205, and information about the display timing is passed to the timer 204. .

  The timer 204 compares the elapsed time after the start of stream reception measured after S1003 in FIG. 11 with the display or non-display time obtained from the duration attribute and cycle attribute of the message information in FIG. 9 (S1103). If it is not the display or non-display time (No in S1103), it waits for the display and non-display time to come. If it is a display / non-display time (Yes in S1103), the timer 204 notifies the message display unit 205 of this, and switches the output or non-output of the automatic display message from the message display unit 205 to the video composition unit 206 (S1104). ). That is, the display or non-display state of the automatic display message on the display screen 207 is changed. Thereafter, the TV 2 determines whether or not the display of the number of times of display obtained by the cycle attribute of the message information has been completed (S1105), and if the display of the specified number of times has not been completed yet, the process returns to S1103.

  13 to 15 are modification examples of message information related to UPnP expression. In the example of FIG. 13, a foo: autoMessage element indicating information related to the automatic display message is expressed as a child element of the item element. Expressed in this way, an automatic display message corresponding to each item can be described. In the example of FIG. 13, an item having “Tuner1 / NNN” as the id attribute value has an automatic display message “Please contact the service center (0120-XXX-XXX)”, and “Tuner1 / FFF” as the id attribute value. "Has an automatic display message" Free broadcast ". As described above, by using the expression method of FIG. 13, it is possible to transmit automatic display messages corresponding to a plurality of items.

  FIG. 14 shows an example in which the same information as in FIG. 13 is described in another expression. The id attribute of the item element shown in FIG. 6 of the corresponding item is described as the channelID attribute of the foo: autoMessage element that describes information related to the automatic display message.

  FIG. 15 shows an automatic display message associated with each stream. For example, when the stream number “0” is assigned to the stream of the broadcast receiving device 1 and the TV 2, and the stream number “1” is assigned to the stream of the broadcast receiving device 1 and the PC 3, foo indicating information regarding the automatic display message is displayed. : A connectionID attribute is provided in the autoMessage element, and each stream number is entered in the attribute value. The TV 2 only needs to read an element whose attribute value of the connectionID attribute is “0”. This makes it possible to display different automatic display messages for a plurality of devices with one message information.

  As described above, according to the present embodiment, the stream analysis unit 102 of the broadcast receiving apparatus 1 separates EMM information that is message information related to the automatic display message from the full TS, and the partial TS that is a video and audio stream. Separately, message information is transmitted, and the TV 2 can display an automatic display message based on this message information. In addition, the message information is a technique used for the network devices to provide functions to each other, and is converted into a widely spread UPnP expression by the message information generation unit 103. Therefore, the message information is highly versatile.

  In the present embodiment, the message information converted into UPnP includes information on the timing for displaying or hiding the automatic display message, the number of times the automatic display message is displayed, and the like, and therefore is described in the EMM information transmitted from the broadcasting station. The same display method as the automatic display message can be displayed on the TV 2.

  In the present embodiment, the automatic display message is switched between display and non-display based on the elapsed time after the start of stream reception on the TV 2, compared with the case where the broadcast reception device 1 notifies the display or non-display timing. Thus, it is possible to prevent the display timing of the automatic display message from being shifted due to a transmission delay or the like. Further, as compared with the case where the broadcast receiving apparatus 1 associates the display timing of the automatic display message with the frame or GOP, it is not necessary to monitor the stream and assign a number to each stream data. It can be implemented in a configuration.

  In the second embodiment, the display timing of the automatic display message is associated not with time but with a frame of a video stream or a GOP (Group of Pictures). In the following description, it is assumed that the display timing of the automatic display message is associated with the GOP. The video system in which the broadcast receiving device 1 and the TV 2 according to the second embodiment are used is the same as that shown in FIG.

  16 and 17 are diagrams showing the configurations of the broadcast receiving apparatus 1 and the TV 2 according to the second embodiment of the present invention, respectively. In these drawings, the same numbers as those in the first embodiment are assigned to the same functions as those of the broadcast receiving apparatus 1 and the TV 2 in the first embodiment. Since the operations of the tuner unit 101, the stream analysis unit 102, the communication unit 104, and the stream selection unit 105 are almost the same as those in the first embodiment, the description thereof is omitted here.

  As in the first embodiment, the stream analysis unit 102 receives the full TS from the tuner unit 101, converts it into a partial TS, passes it to the communication unit 104, and sends EMM information, which is message information related to the automatic display message, from the full TS. This is separated and passed to the message information generation unit 103. The stream analysis unit 102 assigns an ID to each GOP of the received stream under the control of the stream association unit 106.

  The broadcast receiving apparatus 1 according to the present embodiment newly includes a stream association unit 106 (stream association unit). The stream association unit 106 monitors and controls the stream analysis unit 102, assigns an ID to the GOP of the received stream, and associates display timing or non-display timing of the automatic display message with each GOP as message information. It describes.

  FIG. 18 is a diagram for explaining the association between the display / non-display timing of the automatic display message and the GOP. As described in the first embodiment, in the EMM information, the display and non-display of the automatic display message are described based on time. The IDs assigned by the stream analysis unit 102 under the control of the stream association unit 106 for the two GOPs to be reproduced at the time T1 when the automatic display message is not displayed are S1 and S2, respectively, and the time T2 at which the automatic display message is displayed. If the IDs assigned to the two GOPs to be reproduced are S3 and S4, respectively, and the IDs assigned to the GOP reproduced at the time T3 when the automatic display message is not displayed are S5 and S6, respectively, this display, The stream association unit 106 describes the ID of the GOP for switching the non-display state in the message information.

  FIG. 19 is an example of message information described in UPnP expression output from the stream association unit 106 to the communication unit 104. Here, the message information output from the message information generator 103 is the same as the message information shown in FIG. 9 of the first embodiment. In the message information of FIG. 9, information regarding the display / non-display timing of the automatic display message is described as a duration attribute and a cycle attribute, but these attributes are deleted from the message information of FIG. 19 output from the stream association unit 106. At the same time, a streamLabel attribute is created as the attribute of the foo: autoMessage element, and “S3, S5, S9, S11, S15, S17”, which is an ID assigned to the GOP for switching the display / non-display timing, is assigned as an attribute value.

  Next, the configuration of the TV 2 will be described. Since the operations of the communication unit 201, the stream processing unit 202, the message information processing unit 203, the message display unit 205, the video composition unit 206, the display screen 207, and the stream request unit 208 are almost the same as those in the first embodiment, the description thereof is omitted. .

  The TV 2 of the first embodiment has the timer 204, but does not have the timer 204 in the present embodiment. Instead, it has a stream monitoring unit 209 that monitors the GOP of the stream processed by the stream processing unit 202.

  The message information processing unit 203 sends, to the stream monitoring unit 209, information related to the GOP ID for switching between display and non-display of the message information. The stream monitoring unit 209 monitors the GOP of the stream processed by the stream processing unit 202, and if this ID and the ID for switching the display / non-display state received from the message information processing unit 203 match, this message is displayed. Notify the display unit 205. The message display unit 205 receives the notification from the stream monitoring unit 209 and outputs an automatic display message to the video composition unit 206.

  Next, the flow of processing related to the automatic display message will be described with reference to FIGS. FIG. 20 is a flowchart showing a processing flow of the broadcast receiving apparatus 1 related to transmission of message information related to the automatic display message.

  First, the broadcast receiving apparatus 1 receives a stream acquisition request from the TV 2 by the communication unit 104 (S1901). This request includes a number for the channel number that it wishes to receive. When receiving the stream acquisition request, the broadcast receiving apparatus 1 switches the channel received by the tuner unit 101 and receives message information regarding the automatic display message from the broadcast station by the tuner unit 101 (S1902). As described in the first embodiment, this is transmitted from the broadcasting station in the EMM format. Further, the broadcast receiving apparatus 1 separates the message information from the video data, the audio data, and the like by the stream analysis unit 102, and converts it into UPnP expression by the message information generation unit 103 (S1903). The message information output here is described in the format shown in FIG. 9 shown in the first embodiment.

  Further, the broadcast receiving apparatus 1 assigns the message display / non-display timing to the ID of each GOP based on the playback time of each GOP and the duration element and cycle element of the message information in the stream association unit 106, for example. The message information is rewritten to (S1904). As described above, for example, a streamLabel element is provided to describe an ID assigned to a GOP whose display state changes, and each element of duration and cycle is deleted. Note that the stream association unit 106 assigns an ID to each GOP for the stream processed by the stream analysis unit 102 so that there is no contradiction with the ID assigned here.

  Furthermore, the broadcast receiving apparatus 1 transmits a notification that the message information has changed from the communication unit 104 to the TV 2 (S1905). If the communication unit 104 receives a message information acquisition request that is a response from the TV 2 (S1906), the broadcast receiving apparatus 1 transmits the message information of UPnP expression output from the stream association unit to the TV 2 (S1907).

FIG. 21 is a flowchart showing a process flow of the TV 2 for receiving message information and displaying / hiding automatic display messages.
The TV 2 receives the message information change notification transmitted from the broadcast receiving device 1 in S1905 of FIG. 20 at the communication unit 201, and transmits a message information acquisition request from the communication unit 201 to the broadcast receiving device 1 ( In response to this, message information transmitted from the broadcast receiving apparatus 1 is received by the communication unit 201 (S2002). The message information received by the communication unit 201 is transferred to the message information processing unit 203, and information about the message code and display position of the automatic display message is switched to display and non-display, which is information about display timing, to the message display unit 205. Information about the GOP ID is passed to the stream monitoring unit 209.

  The stream monitoring unit 209 monitors the stream processing unit 202, determines whether the GOP ID of the stream processed by the stream processing unit 202 is the ID of the GOP that changes the display state (S2003), and displays the display state. If it is not a GOP to be changed (No in S2003), it waits for a GOP to change the display state. If it is a GOP that changes the display state (Yes in S2003), the stream monitoring unit 209 notifies the message display unit 205 of this, and outputs or does not output an automatic display message from the message display unit 205 to the video composition unit 206. Switching (S2004) That is, the display or non-display state of the automatic display message on the display screen 207 is switched. Thereafter, it is determined whether or not the change of the display or non-display state described in the streamLabel attribute has been completed (S2005), and if not completed, the process returns to S2003.

  As described above, in the present embodiment, message information is created by associating the message display / non-display timing with the GOP of the video stream in the broadcast receiving apparatus 1, and based on this, the TV 2 displays or hides the automatic display message. Switch the display status. According to this embodiment, the broadcast receiver 1 and the TV 2 do not necessarily have a timer. In addition, since processing is performed in association with the GOP of the stream, for example, it is possible to suppress the display timing from being shifted due to a command processing delay or the like as compared with a case where the timing is notified from the broadcast receiving apparatus 1 when a predetermined time elapses. can do.

  In the above description, the switching state of the display state of the automatic display message is associated with the GOP. However, as described at the beginning of the present embodiment, it may be associated with a frame whose display state is changed.

  In the third embodiment, the display timing of the automatic display message is notified from the broadcast receiving apparatus 1 to the TV 2. The video system in which the broadcast receiving device 1 and the TV 2 according to the third embodiment are used is the same as that shown in FIG.

  22 and 23 are diagrams showing configurations of the broadcast receiving apparatus 1 and the TV 2 according to the third embodiment of the present invention, respectively. In these drawings, components having the same role as the components of the broadcast receiving apparatus 1 and the TV 2 of the first embodiment are assigned the same numbers as those of the first embodiment. Since the operations of the tuner unit 101, the stream analysis unit 102, the communication unit 104, and the stream selection unit 105 are almost the same as those in the first embodiment, the description thereof is omitted here.

  The message information generation unit 103 converts the message information received from the stream analysis unit 102 into UPnP representation, creates message information in the format as shown in FIG. 9 of the first embodiment, and activates the timer 107 to receive the stream. Allow elapsed time after start to be measured. In the present embodiment, the display timing of the automatic display message is transmitted from the broadcast receiving apparatus 1 side, so the duration attribute and the cycle attribute are not necessarily required.

  The broadcast receiving apparatus 1 according to the present embodiment newly includes a timer 107 (time measuring means) and a message display timing notification unit 108. The timer 107 measures the elapsed time after the start of stream reception, and receives information about display and non-display timings, that is, information about automatic display durations 1 to 3 and the number of automatic display times from the message information generation unit 103. The timer 107 notifies the message display timing notification unit 108 of this when it is time to switch the display state based on the information on the elapsed time and display and non-display timing. The message display timing notification unit creates timing information based on the message display timing notification unit, and the broadcast receiving apparatus 1 transmits the timing information from the communication unit 104 to the TV 2.

  Next, the configuration of the TV 2 will be described. Since the operations of the communication unit 201, the stream processing unit 202, the message information processing unit 203, the message display unit 205, the video composition unit 206, the display screen 207, and the stream request unit 208 are almost the same as those in the first embodiment, the description thereof is omitted. .

  The TV 2 according to the first embodiment has the timer 204, but does not have the timer 204 in the present embodiment. Instead, it has a timing information processing unit 210 that processes timing information received by the communication unit 201.

  When receiving the timing information from the broadcast receiving device 1, the communication unit 201 passes this to the timing information processing unit 210. Based on this, the timing information processing unit 210 notifies the message display unit 205 of switching of the display or non-display state of the automatic display message. The message display unit 205 switches between output and non-output of the automatic display message output from the message information processing unit 203 to the video composition unit 206 in response to the notification from the timing information processing unit 210.

24 and 25 are examples of timing information created by the message display timing notification unit 108. FIG. This timing information is also described in UPnP expression.
The timing information in FIG. 24 is described as a containerUpdateID element. In the example of FIG. 24, it can be seen that the state of Tuner1 has changed. The number “123” is a number assigned as a serial number for each state change, and is incremented by one instruction. By assigning such a number, for example, if the timing information received by the TV 2 is 2 larger than the value of the timing information received last time, reception of one command fails before that. You can see that

  In the example of FIG. 25, by having a foo: autoMessage element indicating the content of the automatic display message under the autoMessageUpdate element indicating the change of the display state, not only the timing information for changing the display state but also the content of the automatic display message It is possible to notify even the information regarding. For example, this is effective when the content of the message code of the automatic display message changes.

  Next, the flow of processing related to the automatic display message will be described with reference to FIGS. FIG. 26 is a flowchart showing a processing flow of the broadcast receiving apparatus 1 related to transmission of message information and timing information related to the automatic display message.

  First, the broadcast receiving apparatus 1 receives a stream acquisition request from the TV 2 by the communication unit 104 (S2501). This request includes information regarding the channel number that is desired to be received. When receiving the stream acquisition request, the broadcast receiving apparatus 1 switches the channel received by the tuner unit 101 and receives message information regarding the automatic display message from the broadcast station by the tuner unit 101 (S2502). As described in the first embodiment, this is transmitted from the broadcasting station in the EMM format. Further, the broadcast receiving apparatus 1 starts the timer 107 (S2503), separates the message information from the video stream and the audio stream by the stream analysis unit 102, and converts the message information generation unit 103 into UPnP representation (S2504). . The message information output here is described in the format shown in FIG. 9 shown in the first embodiment.

  Furthermore, the broadcast receiving apparatus 1 transmits a notification that the message information has changed from the communication unit 104 to the TV 2 (S2505). When the communication unit 104 receives a message information acquisition request that is a response from the TV 2 (S2506), the broadcast receiving apparatus 1 transmits the message information in UPnP expression output from the message information generation unit 103 to the TV 2 (S2507). ).

  The broadcast receiving apparatus compares the elapsed time after the start of stream reception measured after S2503 with the display and non-display times obtained from the EMM information (S1103), and unless the display state is switched (No in S2508). Then, it waits for the display state switching time to come (S2508). If it is time to switch the display state (Yes in S2508), the timer 107 notifies the message display timing notification unit 108 of this, and the message display timing notification unit 108 creates the timing information shown in FIG. 24 or FIG. Transmission is performed from the communication unit 104 to the TV 2 (S2509). Thereafter, the TV 2 determines whether or not the display for the number of times obtained by the automatic display count of EMM information has been completed (S2501), and if the display for the specified number of times has not been completed yet, the process returns to S2508.

FIG. 27 is a flowchart showing a process flow of the TV 2 related to message information reception and automatic display message display / non-display.
The TV 2 receives the message information change notification transmitted from the broadcast receiver 1 in S2505 of FIG. 26 by the communication unit 201, and transmits a message information acquisition request from the communication unit 201 to the broadcast receiver 1 ( In response to this, message information transmitted from the broadcast receiving apparatus 1 is received by the communication unit 201 (S2602). The message information received by the communication unit 201 is transferred to the message information processing unit 203, and information on the message code and display position of the automatic display message is output to the message display unit 205.

  The timing information processing unit 210 determines whether or not the timing information has been received by the communication unit 201. If the timing information has not been received by the communication unit 201 (No in S2603), the timing information processing unit 210 waits for this reception (S2603). If the timing information is received by the communication unit 201 (Yes in S2603), this is notified to the message display unit 205, and the output or non-output of the automatic display message from the message display unit 205 to the video composition unit 206 is switched (S2604). . That is, the display or non-display state of the automatic display message on the display screen 207 is switched. Thereafter, the process returns to S2603.

  As described above, in this embodiment, the broadcast receiving apparatus 1 notifies the timing of the display / non-display state of the automatic display message. Thereby, it is not always necessary to have a timer on the TV 2 side.

1 is a diagram illustrating a configuration example of a video system in which a video receiving apparatus, a TV, and a PC according to Embodiment 1 of the present invention are used. The figure which shows the example of the display screen which displayed the automatic display message with the video equipment apparatus which concerns on Example 1 of this invention. The figure which shows the structure of the broadcast receiver which concerns on Example 1 of this invention. The figure which shows the structure of TV which concerns on Example 1 of this invention. The figure which shows typically the tuner expression used when the video receiver which concerns on Example 1 of this invention presents information required for channel selection. A specific implementation example of the tuner expression of FIG. The figure which shows the detailed structural example of EMM information. The figure for demonstrating the automatic display continuation time of EMM information. The figure which shows the example of the message information converted into the UPnP format by the broadcast receiver which concerns on Example 1 of this invention. The figure which shows the flow of the process which concerns on transmission of the message information regarding the automatic display message by the broadcast receiver which concerns on Example 1 of this invention. The figure which shows the flow of the process which concerns on the elapsed time measurement after the stream reception by TV which concerns on Example 1 of this invention. The figure which shows the flow of the process which concerns on reception of message information of the TV which concerns on Example 1 of this invention, and the display and non-display of an automatic display message. The figure which shows the modification of the message information converted into UPnP expression by the broadcast receiver which concerns on Example 1 of this invention. The figure which shows the modification of the message information converted into UPnP expression by the broadcast receiver which concerns on Example 1 of this invention. The figure which shows the modification of the message information converted into UPnP expression by the broadcast receiver which concerns on Example 1 of this invention. The figure which shows the structure of the broadcast receiver which concerns on Example 2 of this invention. The figure which shows the structure of TV which concerns on Example 2 of this invention. The figure for demonstrating matching with the display of the automatic display message in the broadcast receiver which concerns on Example 2 of this invention, non-display timing, and GOP. The figure which shows the example of the message information converted into UPnP expression by the broadcast receiver which concerns on Example 2 of this invention. The figure which shows the flow of the process which concerns on transmission of the message information regarding the automatic display message by the broadcast receiver which concerns on Example 2 of this invention. The figure which shows the flow of the process which concerns on reception of the message information by TV concerning Example 2 of this invention, and the display of an automatic display message, and non-display. The figure which shows the structure of the broadcast receiving apparatus which concerns on Example 3 of this invention. The figure which shows the structure of TV which concerns on Example 3 of this invention. The figure which shows the example of the timing information produced with the broadcast receiver which concerns on Example 3 of this invention. The figure which shows the modification of the timing information produced with the broadcast receiver which concerns on Example 3 of this invention. The figure which shows the flow of the process which concerns on transmission of the message information regarding the automatic display message by the broadcast receiver which concerns on Example 3 of this invention, and transmission of timing information. The figure which shows the flow of the process which concerns on the display of the automatic display message of TV2 which concerns on Example 3 of this invention, and non-display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Broadcast receiving apparatus 2 ... Television 2a ... Message 3 ... PC
101 ... Tuner unit 102 ... Stream analysis unit 103 ... Message information generation unit 104 ... Communication unit 105 ... Stream selection unit 106 ... Stream association unit 107 ... Timer 108 ... Message display timing notification unit 201 ... communication unit 202 ... stream processing unit 203 ... message information processing unit 204 ... timer 205 ... message display unit 206 ... video composition unit 207 ... display Screen 208 ... Stream request unit 209 ... Stream monitoring unit 210 ... Timing information processing unit

Claims (13)

Receiving means for receiving a transport stream of a desired channel from digital broadcasting;
A stream analyzer that creates a partial transport stream from the transport stream received by the receiving means and separates message information from the transport stream;
A broadcast receiving apparatus comprising: the partial transport stream created by the stream analysis unit; and transmission means for transmitting the message information separated by the stream analysis unit to another device. The broadcast receiving device according to claim 1,
A message information conversion unit that converts the message information separated by the stream analysis unit into a predetermined format;
The transmission means transmits the partial transport stream created by the stream analysis unit and the message information converted into the predetermined format by the message information conversion unit to the other device. Broadcast receiving device. 3. The broadcast receiving apparatus according to claim 2, wherein the predetermined format in which the message information is converted by the message information conversion unit is an XML format supported by UPnP. The message information includes a message displayed by the other device, a time during which the message is displayed, a time during which the message is not displayed, and information regarding the number of times the message is displayed. Broadcast receiving device. The broadcast receiving device according to claim 1,
A stream association means for converting the message information into a message displayed by the other device, a message including information on a frame or GOP of a video by the partial transport stream that displays or hides the message, and
The broadcast receiving apparatus, wherein the transmission unit transmits the partial transport stream created by the stream analysis unit and the message information converted by the stream association unit to the other device. The broadcast receiving device according to claim 1,
Further comprising time measuring means for measuring an elapsed time after the transmission start of the partial transport stream from the transmission means,
The transmission unit transmits the timing information for notifying the other device of the timing for displaying the message based on the message information based on the elapsed time measured by the time measuring unit. apparatus. The broadcast receiving apparatus according to claim 6, wherein the timing information is described in an XML format supported by UPnP. A partial transport stream obtained by converting a transport stream of digital broadcasting, and receiving means for receiving message information separated from the transport stream from a broadcast receiving device;
A video equipment apparatus comprising: a display unit configured to display a video based on the partial transport stream received by the reception unit and a message based on the message information on a display screen. 9. The video equipment apparatus according to claim 8, wherein the receiving unit receives the message information converted into an XML format supported by UPnP in the broadcast receiving apparatus. The video equipment apparatus according to claim 8, wherein
Further comprising time measuring means for measuring an elapsed time after starting reception of the partial transport stream by the receiving means,
The message information includes a message displayed by the display means, a time for displaying the message, a time for not displaying the message, and information regarding the number of times the message is displayed,
The display device switches between displaying and hiding the message based on the message information and the elapsed time measured by the timing unit. The message information includes a message displayed by the display means, and information on a frame or GOP of a video by the partial transport that displays and hides the message,
9. The video equipment apparatus according to claim 8, wherein the display unit switches between displaying and hiding the message based on the message information. The receiving means receives timing information for notifying the timing of displaying a message based on the message information on the display screen from the broadcast receiving device,
9. The video equipment apparatus according to claim 8, wherein the display unit displays the message on the display screen when the timing information is received from the reception unit. 13. The video equipment apparatus according to claim 12, wherein the timing information is described in an XML format supported by UPnP.

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