WO2015152281A1

WO2015152281A1 - Reproduction device and delivery device

Info

Publication number: WO2015152281A1
Application number: PCT/JP2015/060231
Authority: WO
Inventors: 琢也岩波; 渡部　秀一; 久雄熊井
Original assignee: シャープ株式会社
Priority date: 2014-04-02
Filing date: 2015-03-31
Publication date: 2015-10-08
Also published as: JP2015201822A; CN106031184A

Abstract

The present invention provides a content presentation control function from a content delivery device. Presentation type information designating the presentation form of each of components constituting a content is acquired from a transmission device (2), and the component associated with the presentation type information is reproduced in a reception device (3).

Description

Playback device, distribution device

The present invention relates to a playback device that acquires and plays back content, and a distribution device that transmits content.

Conventionally, in content distribution such as digital broadcasting, components such as video and audio are integrated into one content and distributed only through the broadcast network. However, with the spread of broadband Internet connections, these are now being distributed. It has been distributed over the Internet.

In addition, the hybrid transmission technology disclosed in Patent Document 1, Non-Patent Document 1 and Non-Patent Document 2 transmits some components constituting the video content via the broadcast network, and the remaining components via the communication network. It has also been proposed to transmit components. In hybrid transmission, components that are expected to be used by a large number of users are provided on the broadcast network, and components that are expected to be used only by a small number of users are provided individually on the communication network. It is effective to use different transmission paths.

Furthermore, distribution of multi-component content composed of multiple video, multiple audio, and multiple data components using heterogeneous networks is being studied. The receiver displays the received content on the screen by synchronizing and synthesizing it. By distributing data in HTML5 (HyperText Markup Language 5) description, combination playback of components (video, audio, text, etc.) and display layout control, which are not in conventional data broadcasting, are performed. By distributing components separately and selecting and receiving necessary components according to user preferences and receiving terminal capabilities, it is possible to cope with diversification of contents and receiving terminals.

On the other hand, a data broadcasting service for transmitting data components via a broadcasting network by the data transmission method disclosed in Non-Patent Document 3 is also provided.

Japanese Patent Publication “Japanese Patent Laid-Open No. 2012-244388 (Released on Dec. 10, 2012)”

In the future, when broadcasting using multi-component content becomes full-fledged, the broadcast itself (one content that reproduces the multi-component) will be treated as one component, and each component included there will also be treated as one component. It can easily be assumed that it will be handled. However, for this purpose, there is a problem that there is no mechanism for referring to the broadcast itself and each component of the broadcast as separate components.

The present invention has been made in view of the above-described problems, and an object of the present invention is to realize a reproduction device and a distribution device that display a multi-component broadcast on a receiver.

The playback device according to the present invention is a playback device that plays back content composed of a plurality of components, and uses the presentation type information associated with each component to determine the presentation type of each component. And a presentation control unit that controls the presentation of each component based on the presentation type determined by the presentation type determination unit.

According to said structure, the said presentation classification information is matched with the group which consists of all the components, The said presentation classification determination part presents each component which belongs to the same group, It is characterized by the above-mentioned. Yes.

Further, according to the above configuration, the presentation type information is associated with a plurality of groups among all the components, and the presentation type determination unit presents each component belonging to the same group. It is characterized by doing.

In addition, according to the above configuration, the presentation type determination unit is characterized in that the presentation to all the components or a plurality of components among all the components or the presentation to each of the components is switched.

A distribution apparatus according to the present invention is a distribution apparatus that transmits a plurality of components used for reproduction of content and presentation type information associated with each component to the reproduction apparatus, the content including the plurality of components, and the above components The present invention further includes a transmission unit that transmits the presentation type information to the playback device.

According to one aspect of the present invention, multi-component broadcasting can be presented to the receiver in an appropriate form.

It is the figure which showed the structure of the delivery system which concerns on one Embodiment of this invention, and the principal part structure of each apparatus contained in a delivery system. It is a figure which shows the flowchart which shows operation | movement of a receiver. It is a figure which shows the parameter description example for the component reference used by this invention. It is another figure which shows the example of parameter description for the component reference used by this invention. It is a figure which shows the example of a parameter description for multiple component reference used by this invention. It is a figure which shows the example of a screen transition displayed on a receiver. It is the figure which showed the principal part structure of each apparatus contained in the structure of the delivery system which concerns on embodiment different from the delivery system of FIG. 1, and a delivery system. It is a figure which shows the example of the management table used by this invention. It is a figure which shows the example of the data transmission message used by this invention. It is a figure which shows the example of the data component update descriptor used by this invention. It is a figure which shows the example of the data transmission section message used by this invention. It is a figure which shows the flowchart which shows operation | movement of the receiver at the time of updating a component using the data component update descriptor used by this invention. It is a figure which shows the example which transmits an exclusive table using the general purpose message used by this invention. It is a figure which shows the example of the general purpose event message descriptor used by this invention.

An embodiment of the present invention will be described with reference to FIGS.

The distribution system according to the present embodiment includes a transmission device that distributes video content by broadcasting (corresponding to “distribution device” in claims) and a reception device that presents video content (“playback device” in claims). System). The video content distributed in the distribution system includes a plurality of components such as a plurality of videos, a plurality of sounds, and data.

First, the main configuration of the receiving device, the transmitting device, and the content server constituting the distribution system according to the present embodiment will be described below with reference to FIG.

FIG. 1 is a block diagram showing the main configuration of each apparatus. As shown in FIG. 1, the distribution system 1 includes a transmission device 2, a reception device 3, and a content server 4.

The transmission device 2 broadcasts content using radio waves, and the reception device 3 can receive content broadcast by receiving radio waves. However, the present invention is not limited to this, and the transmission device 2 and the reception device 3 may be connected to each other via a network and can transmit data. In this case, the transmission device 2 and the reception device 3 may be connected to each other via at least a network so that data can be transmitted and received.

Further, the transmission device 2 may distribute the content to the reception device 3 in real time (real time distribution), or may distribute (on-demand distribution) in response to a request from the reception device 3. In this case, the transmission device 2 and the reception device 3 may be connected to each other via at least a network so that data can be transmitted and received.

In the example shown in FIG. 1, the distribution system 1 includes one transmission device 2 and one reception device 3, but the present invention is not limited to this. The distribution system 1 may include a plurality of transmission devices 2 and reception devices 3. That is, the distribution system 1 may include one or a plurality of transmission devices 2 and reception devices 3.

Further, the transmission device 2 is composed of a transmission device that broadcasts content using radio waves and a transmission device that is connected to communicate via a network and transmits data, and is capable of hybrid distribution in which components are distributed separately. Good.

(Transmitter 2)
The transmission device 2 includes a content creation unit 21, a metadata storage unit 22, and a broadcast transmission unit 23.

The content creation unit 21 creates video content by performing an encoding process on the video signal input from the content server 4 outside the transmission device 2.

The broadcast transmission unit 23 transmits video content and metadata of the video content on a broadcast wave.

The metadata storage unit 22 stores metadata of video content transmitted by the broadcast transmission unit 23. This metadata is edited in advance so as to reflect the intention of the distributor.

(Receiver 3)
The receiving device 3 includes a broadcast receiving unit 31, a component determining unit 32, an operation unit 33, a component separating unit 34, a video decoding unit 35, an audio decoding unit 36, a data broadcast extracting unit 37, a combining unit 38, a display 39, and a speaker. 40.

The reception device 3 is a content reproduction device that reproduces video content acquired from the transmission device 2. The receiving device 3 is, for example, a digital television, a recorder, an STB (Set Top Box), a PC (Personal Computer), a mobile phone, a smartphone, a game machine, a PDA (Personal Digital Assistant), a digital camera, a digital video, or the like.

The broadcast receiving unit 31 is a tuner that receives broadcast waves.

The component determination unit 32 acquires video content (including a video component, an audio component, and a data component) and metadata of the video content from the broadcast receiving unit 31, refers to the metadata of the video content, and sets each component. It is determined whether to supply to the video decoding unit 35, whether to supply to the audio decoding unit 36, and whether to supply to the data broadcast extraction unit 37. Here, the number of each component is not limited to one. For example, a plurality of video components may exist.

The operation unit 33 is for the user to input an instruction signal to the receiving device 3 and operate the receiving device 3. The operation unit 33 may be configured by input devices such as operation buttons, a keyboard, a mouse, and a keypad. Further, a touch panel in which the operation unit 33 and the display 39 are integrated may be used. The operation unit 33 may be a remote control device such as a remote controller that is separate from the receiving device 3. The operation unit 33 may be a gesture recognition device that recognizes a user's gesture.

Note that the operation unit 33 may acquire the metadata of the video content from the component determination unit 32 and respond to the component determination unit 32 with the result of the user selecting a desired video component. In this case, the component determination unit 32 replaces the metadata of the video content.

The component separation unit 34 acquires the component determination result, and separates the video content obtained by receiving the broadcast wave into a video component, an audio component, and a data component. The video component is supplied to the video decoding unit 35. The audio component is supplied to the audio decoding unit 36. The data component is supplied to the data broadcast extraction unit 37.

The video decoding unit 35 decodes the video component supplied from the component separation unit 34.

The audio decoding unit 36 decodes the audio component supplied from the component separation unit 34.

The data broadcast extracting unit 37 uses various data such as JPEG and PNG format still image data and text data, which are data components for data broadcasting, and data broadcasting applications, from the data stream supplied from the component separating unit 34. To extract. An application for data broadcasting includes, for example, applying Java (registered trademark) technology, but is not limited thereto.

The synthesizing unit 38 is supplied with the video signal from the video decoding unit 35 and the data component from the data broadcast extraction unit 37. The synthesizing unit 38 synthesizes a video signal of a program or the like and a video signal of data for data broadcasting, and supplies them to the display 39. Thereby, on the display 39, for example, an image in which data for data broadcasting is superimposed on the program is displayed.

The display 39 is for receiving the video signal from the video decoding unit and displaying the video. For example, an LCD (liquid crystal display), an organic EL display, a plasma display, or the like can be applied.

The speaker 40 receives an electrical signal from the voice decoding unit, converts the received electrical signal into sound, and outputs the sound to the outside.

Further, the configuration of the distribution system 1 is not limited to the example shown in FIG. For example, the distribution system 1 may include a plurality of transmission devices 2 or a plurality of reception devices 3. Moreover, the transmission apparatus 2 may include a content server.

Hereinafter, the operation when the receiving device 3 starts to present video content will be described with reference to FIGS. FIG. 2 is a flowchart showing the operation of the receiving device 3. 3 to 5 are diagrams schematically showing specific examples of metadata, which are described in the HTML format. In FIG. 3A, “FF” indicates a reference of the entire component including video, audio and data (that is, a reference to the program content itself). In FIG. 3B, “01” to “03” Each shows a reference to a specific component. FIG. 4 shows another example of component reference, and FIG. 5 shows an example of multiple component reference. FIG. 6 shows an example of an image displayed on the display 39 of the receiving device 3.

As shown in FIG. 2, first, the broadcast receiving unit 31 of the receiving device 3 acquires the metadata of the video content and starts receiving the video content (S1).

Here, in the example of FIG. 3, it is assumed that the program content is composed of a total of three components of “01”, “02”, and “03”. The metadata of the video content includes, for each component included in the video content, information indicating that the program content itself should be presented to the receiving device 3 or information indicating that some components should be presented to the receiving device 3. It is. In the example of FIG. 3A, “FF” corresponds to the former information, and in the example of FIG. 3B, “01”, “02”, and “03” correspond to the latter information. That is, the metadata in FIG. 3A indicates that the program content itself associated with “FF” is presented to the receiving device 3. Similarly, the metadata in FIG. 3B indicates that each component of the program content associated with “01”, “02”, and “03” is presented to the receiving device 3. By referring to the program content itself and each component included therein, it is possible to refer to the program content presentation form.

The component determining unit 32 of the receiving device 3 determines whether “FF” is associated with the name of the metadata component (S2). Specifically, when the metadata is HTML format data, the component determination unit 32 determines whether the attribute value of the attribute “value” of the “object” tag of the metadata is “FF”.

When it is determined that “FF” is associated ”(“ Yes ”in S2), the receiving device 3 starts transmission of all components to the data broadcast extraction unit via the component separation unit 34 (S3). The process proceeds to S4.

On the other hand, when the receiving device 3 determines that “FF” is not associated ”or“ any one of “01”, “02”, and “03” is associated ”(NO in S2), S6 Proceed to the process.

Next, the component determination unit 32 of the receiving device 3 adds “01”, “02”, “03” to the name of the i-th component from the beginning of the metadata (i = 1 when the immediately preceding step is S1). And “01”, “02”, and “03” are associated ”, the data broadcast extraction unit via the component separation unit 34 is determined. The transmission of the i-th component is started (S6), and the process proceeds to S7. Specifically, when the metadata is HTML format data, the component determination unit 32 determines that the attribute value of the attribute “value” of the i-th “object” tag from the top of the metadata is “01”, “02”. , "03" is determined.

In S7, the component separation unit 34 of the receiving device 3 determines whether or not the processing of S6 has been performed for all components.

If the receiving device 3 determines that “there is a component that has not been subjected to the processing of S6” (“Yes” in S7), the receiving device 3 returns to the processing of S6 in which the processing target is the i + 1st component. On the other hand, when it is determined that “the process of S6 has been performed for all components” (“No” in S7), the reception device 3 proceeds to the process of S4.

In S4, the receiving device 3 combines the decoded video component and the data component for data broadcasting, and supplies them to the display 39.

In S5, the receiving apparatus 3 displays the synthesized video signal and the data signal of the data for data broadcasting on the display 39. For example, an image in which data for data broadcasting is superimposed on a program is displayed.

The operation of the receiving device 3 is completed through the process of S5.

(Screen transition when presentation control of multiple components is performed)
By the way, by executing the above-described video content presentation control, the receiving device 3 can perform screen transition as shown in FIG. 6, for example.

FIG. 6 is a diagram illustrating a transition example of the screen displayed on the receiving device 3.

As shown in FIG. 6, when a predetermined channel is selected by the operation of the remote controller or the like by the user in the receiving device 3 or the like, the video of the predetermined program is displayed on the display 39. Also, reception of data broadcasting is started. At this time, the video of the program is displayed, but the video for data broadcasting is not displayed.

Here, when a data broadcast display button such as a remote controller is operated by the user, the data for data broadcasting is displayed in a separated arrangement with respect to the video of the program (FIG. 6 (a)). When a predetermined data event occurs due to switching of a program or a specific scene, the display content of data for data broadcasting is switched according to the data event. When the data broadcast display button is operated again while the data broadcast data is displayed, the display of the data broadcast data is terminated, and the display returns to the state where only the program video is displayed.

In the state where the video of the program or the data broadcasting data is displayed on the display 39, the display 39 selects the component 51 and the component 52 that are currently being broadcast by the user using a button such as a remote controller. Can be viewed. When an operation of selecting and viewing the component 52 is performed by the user, the component 51 and the component 52 currently being broadcast are reduced to the display 39 and displayed as the component 51 ′ and the component 52 ′, and the selected component 52 is simultaneously displayed. The display is enlarged to 39 and displayed as a component 52 ″, and the related data 53 of the component is also displayed on the display 39 at the same time (FIG. 6B).

The selected component 52 ″ is displayed on the display 39 in a separated arrangement with respect to the program video. However, the selected component may be displayed in an overlay arrangement with respect to the program video. .

Then, when the user performs an operation to end the selected viewing while the selected component is displayed, the display of the currently selected component is ended and the state returns to the state where only the program video is displayed.

As described above, the receiving apparatus 3 can execute both data broadcasting by data broadcasting and simultaneous display of all components of a program and simultaneous display of selected components in conjunction with the program.

(Modification 1)
In the video content metadata, information indicating that the entire component or a part of the component should be presented to the receiving device 3 may not be recorded in the attribute value of the attribute “value” of the “object” tag. That is, as shown in FIG. 4, if “-full” is recorded in the attribute value of the attribute “type” of the “object” tag, it is determined that the component is an entire component, and the attribute “type” of the “object” tag is determined. If the attribute value of “-comp” is recorded, information indicating that it should be presented may be described in the metadata, such as determining that the component is a partial component.

(Modification 2)
In the video content metadata, information indicating that the component should be presented to the receiving device 3 for each component of the video content may not be recorded. That is, as shown in FIG. 5, when information of a plurality of components to be simultaneously presented in metadata is recorded as presentation information such as “-partial” in the attribute value of the attribute “type” of the “object” tag, You may determine with it being the component shown simultaneously.

Another embodiment of the present invention will be described with reference to FIGS.

In the present embodiment, a case will be described in which a part of data components included in video content is updated in the distribution system. For convenience of explanation, members having the same functions as those shown in the above embodiment are given the same reference numerals, and the explanation thereof is omitted. Hereinafter, differences from the above-described embodiment will be mainly described.

FIG. 7 is a block diagram showing the main configuration of each apparatus. As illustrated in FIG. 7, the distribution system 1 ′ includes a transmission device 2 ′, a reception device 3 ′, and a content server 4.

The transmitting device 2 'broadcasts content via radio waves and a network, and the receiving device 3' receives radio waves and receives content broadcast via the network, and can transmit and receive data via the network. And

In the example shown in FIG. 7, the distribution system 1 ′ includes one transmission device 2 ′ and one reception device 3 ′, but is not limited thereto. The distribution system 1 ′ may include a plurality of transmission devices 2 ′ and reception devices 3 ′. In other words, the distribution system 1 ′ may include one or more transmission devices 2 ′ and reception devices 3 ′.

Further, the transmission device 2 ′ and the reception device 3 ′ may be configured by only a transmission device that broadcasts content using radio waves and a reception device that receives content. Further, the transmission device 2 ′ may include the content server 4.

(Transmitter 2 ')
First, the configuration of the transmission apparatus 2 ′ according to the present embodiment will be described based on FIG. FIG. 7 is a block diagram showing an example of the configuration of the transmission device 2 ′.

The transmission device 2 ′ includes a content creation unit 21 ′, a broadcast transmission unit 23, and a communication transmission / reception unit 24. The transmission device 2 ′ may include members such as a display unit and an operation unit, but these members are not shown because they are not related to the feature points of the invention.

The content creation unit 21 ′ encodes signal data (including a video signal, an audio signal, and data) input from the content server 4 and performs a multiplexing process on the encoded data and related metadata. To create video content (including video component, audio component and data component). In addition, when a part of the data component included in the video content is updated, a control signal for updating a part of the data component is generated on the receiving side, and the multiplexing process to the video content is also performed.

(Receiving device 3 ')
The reception device 3 ′ includes a broadcast reception unit 31, a component determination unit 32, an operation unit 33, a component separation unit 34 ′, a video decoding unit 35, an audio decoding unit 36, a data broadcast extraction unit 37 ′, a synthesis unit 38 ′, and a display 39. , A speaker 40, and a communication transceiver 41.

The reception device 3 ′ is a content reproduction device that reproduces the video content acquired from the transmission device 2 ′.

The component separation unit 34 ′ acquires the component determination result, and separates the video content obtained by receiving the broadcast wave into a video component, an audio component, and a data component. The video component is supplied to the video decoding unit 35. The audio component is supplied to the audio decoding unit 36. The data component is supplied to the data broadcast extraction unit 37 ′. Further, when a control signal for updating a part of the data component is received, the control signal and data for updating a part of the data component are supplied to the data broadcast extraction unit.

The data broadcast extraction unit 37 ′ uses various media such as JPEG and PNG format still image data, MP4 format moving image data and text data, which are data components for data broadcasting, from the data stream supplied from the component separation unit 34 ′. Extract data and data broadcasting applications. An application for data broadcasting includes, for example, application of HTML5 technology, but is not limited thereto. When a control signal and update data for updating a part of the data component are supplied, the data component is updated according to the control signal. Here, the control signal and the update data are supplied from the component separation unit 34 ′, but may be acquired from the transmission device 2 ′ via the network using the communication transmission / reception unit 41.

The video signal from the video decoding unit 35 and the data component from the data broadcast extraction unit 37 are supplied to the synthesizing unit 38 ′. The synthesizing unit 38 ′ synthesizes a video signal of a program or the like and a video signal of data for data broadcasting, and supplies it to the display 39. Thereby, on the display 39, for example, an image in which data for data broadcasting is superimposed on the program is displayed. In addition, the signal to be combined is supplied from the video decoding unit 35 and the data broadcast extracting unit 37 ′, but the video component acquired from the transmission device 2 ′ via the network is also combined using the communication transmitting / receiving unit 41. It is good as well.

Hereinafter, the operation when the receiving device 3 ′ updates a part of the data component will be described with reference to FIGS. FIG. 12 is a flowchart showing the operation of the receiving device 3 ′ when a part of the data component is updated. FIG. 8 is a diagram specifically showing the data structure of the data component as a management table, and is an example in the case of being configured in the MMT format. FIG. 9 is an example in the case where a control signal for updating a part of the data component is specifically shown as a data transmission message.

First, the process in which the component separation unit 34 ′ separates the data components will be described. In this embodiment, an example in which a management table for managing data (items) constituting a data component (asset) is transmitted with reference to a signaling message format defined by MMT will be described. FIG. 8 shows a specific example of the data transmission message for transmitting the management table and FIG. 9 shows the management table.

The example of the data structure of the management table shown in FIG. 8A describes information constituting an asset. The data table update descriptor may be stored in the management table, and this table may be configured to indicate the update of the data component (FIG. 8B). The meaning of the data structure described in the management table is as follows.
Table_id (table identification): identifies a management table.
-Version (version): The area where the version number of the table is written.
Length (table length): an area in which the number of data bytes following this field is written.
Asset_ID (asset identification): indicates an ID for identifying the asset.
Asset_version (asset ID version): indicates the version of the asset.
Num_of_MPUs (number of MPUs): An area for writing the number of MPUs.
MPU_sequence_number (MPU sequence number): Indicates a number for identifying the MPU.
-MPU_version (MPU sequence number version): Indicates the MPU version.
Num_of_items (number of items): An area in which the number of items is written.
Item_ID (item identification): Indicates an ID for identifying an item transmitted by MPU with non-timed media.
-Item_version (item version): indicates the version of the item.
Item_info_length (item information length): indicates the byte length of the subsequent item information area.
Item_info_byte (item information byte): Information related to the item is stored in a series of areas.
Descriptor_loop_length (descriptor length): indicates the total byte length of the subsequent descriptor.
Descriptor (descriptor area): A descriptor is stored in a series of areas. The descriptor to be stored is defined separately.
Update_descriptor (descriptor area): stores a data component update descriptor.

The example of the data transmission message shown in FIG. 9 is for storing and transmitting a table. The meaning of the data structure described in the data transmission message is as follows.
Message_id (message identification): indicates an ID for identifying a data transmission message.
• version: This is the area where the version number of the data transmission message is written.
Length (message length): indicates the size in bytes from immediately after this field to the end of the message.
Num_of_tables (number of tables): indicates the number of tables stored in this data transmission message.
Table_ID (table identification): indicates the table identification of the table stored in this data transmission message.
Table (table): indicates a table stored in the data transmission message.

When the received data transmission message includes a management table, the component separation unit 34 ′ separates the corresponding data component in accordance with the information in the table, and extracts the data management and the data table management information from the data broadcast. To the unit 37 '.

Next, processing for updating a part of the data component will be described. In the present embodiment, an example in which a control signal for updating a part of a data component is transmitted with reference to an event message transmission method defined in ARIB STD-B24 will be described. In the event message transmission method, means for sending message information (event message) immediately or at a designated time is provided from an application operating on the receiving device 3 'to the transmitting device 2'.

As shown in FIG. 7, the broadcast receiving unit 31 of the receiving device 3 ′ starts acquiring the event message and starts receiving the video content (S11).

Here, FIG. 10 is an example in the case where the information of the control signal for updating a part of the data component sent by the event message is specifically described as the data component update descriptor in the descriptor format. FIG. 11 is an example in which the structure of a message for transmitting a data component update descriptor is specifically described using an event message transmission method.

Here, it is assumed that the event message is multiplexed on the video content transmitted from the transmission device 2 ′ at regular intervals, and the component separation unit 34 ′ periodically acquires the event message and is shown in the flowchart of FIG. Processing will be performed.

The meaning of the data component update descriptor shown in FIG. 10 (a) is as follows.
Descriptor_tag (descriptor tag): indicates a tag indicating a data component update descriptor. Descriptor_length (descriptor length): An area in which the number of data bytes following this field is written.
Data_Asset_Update_flag (data component update flag): indicates a flag indicating the type of data update. When the flag is “asset”, the component is updated. When the flag is “MPU”, “MPU”, which is data constituting “asset”, is updated. When the flag is “item”, “MPU” is configured. This means that “item”, which is data to be updated, is updated.
Asset_ID (asset identification): indicates an ID for identifying the asset.
MPU_sequence_number (MPU sequence number): Indicates a number for identifying the MPU.
-Item_ID (item identification): Identifies an item transmitted by MPU with non-timed media.
Data_Asset_Update_version (data component update version): Indicates the version by data update.
Data_event_id (data event identification): This field indicates an identifier for identifying an individual data event message.

If “MPU” and “item” are the same data, they can be represented as an example of the data component update descriptor shown in FIG.

The meaning of the data structure described in the event message shown in FIG. 11 is as follows.
Message_id (message identification): indicates an ID for identifying an event message.
-Version (version): The area where the version number of the event message is written.
Length (message length): an area in which the number of data bytes following this field is written.
Table_id (table identification): indicates that the stream descriptor is stored in the payload of the section.
Section_syntax_indicator (section syntax instruction): Set to '1' indicating the extended format.
Private_indicator: This 1-bit field stores the inverted value of the section syntax instruction value.
Section_length (section length): An area in which the number of data bytes following the section length area is written.
Data_event_id (data event identification): This field distinguishes temporally adjacent data events using event messages, and indicates that event messages are misdelivered between local contents delivered by those data events. An identifier intended to be avoided.
Event_msg_group_id (message group identification): This field indicates an identifier for identifying a message group to be received by the application.
-Version_number (version number): It is an area for writing the version number of the table.
Current_next_indicator: “1” if the table is currently available, and “0” if the table is currently unavailable and indicates that it will be valid next.
Section_number (section number): An area in which section numbers constituting the table are written.
Last_section_number (last section number): This is an area in which the last section number constituting the table is written.
-CRC_32 (CRC): It shall comply with ITU-T recommendation H.222.0.

In the example shown in the figure, when the data component update descriptor is included in the event message (Yes in S12), the contents of Data_asset_Update_flag of the data component update descriptor are confirmed. When “asset_ID” is set in Data_asset_Update_flag of the data component update descriptor (Yes in S13), “asset_version” corresponding to “asset_ID” is acquired, and the data of the entire target asset of the specified asset_ID and The version is updated (S14). When “MPU_sequence_number” is set in Data_asset_Update_flag of the data component update descriptor (No in S13, Yes in S15), “MPU_version” corresponding to “MPU_sequence_number” is acquired, and “MPU_number of specified“ MPU_sequence ”is acquired. The MPU corresponding to the group and the version corresponding to the MPU are updated (S16). When “item_ID” is set in Data_asset_Update_flag of the data component update descriptor (No in S13, No in S15), the item corresponding to the designated “item_ID” and the version corresponding to the item are updated (S17). . If the data message update descriptor is not included in the event message (No in S12), the event message is periodically processed after waiting for the next event message to be acquired.

(Modification example 1)
Next, an example of transmitting a data component update descriptor indicating information of a control signal for updating a part of the data component with reference to a signaling message format defined in MMT will be described with reference to FIGS. 9 and 13. explain. FIG. 9 and FIG. 13 are examples of a case where a data component update descriptor indicating information of a control signal for updating a part of a data component is specifically described in a signaling message format.

Here, since a specific example of the data transmission message for transmitting the data component update table is described in FIG.

The meaning of the data structure of the data component update table shown in FIG. 13 is as follows.
Table_id (table identification): identifies a management table.
-Version (version): The area where the version number of the table is written.
Length (table length): an area in which the number of data bytes following this field is written.
Descriptor_length (descriptor length): An area in which the number of data bytes following this field is written.
Data_Asset_Update_descriptor (descriptor area): Stores a data component update descriptor.

The receiving device 3 ′ extracts the data component update table included in the data transmission message from the received data transmission message, and sets the asset or item of the corresponding data component according to the data component update descriptor included in the data component update table. Update. In this embodiment, when the data transmission message is received, the asset or item of the corresponding data component is updated. However, the general event message of the event message transmission method defined in ARIB STD-B24 is used. Referring to the asset specified in the data update descriptor corresponding to data_event_id included in the general event message descriptor according to the time of occurrence of the event specified in the general event message descriptor included in the data transmission message described above or The item may be updated. FIG. 14 is a specific example of a general-purpose event message descriptor.

The meaning of the general-purpose event message descriptor shown in FIG. 14 is as follows.
Descriptor_tag (descriptor tag): a tag indicating a general-purpose event message descriptor.
Descriptor_length (descriptor length): An area in which the number of data bytes following this field is written.
Event_msg_group_id (message group identification): This field indicates an identifier for identifying a message group to be received by the application.
Time_mode (time mode): This field indicates a method of specifying the time at which the event message occurs. If 0x00, an event message is generated immediately after reception. In the case of 0x02, an event message is generated according to the NPT time data.
Event_msg_NPT: This field is encoded when time_mode = 0x02, and represents the time at which the event message occurs by Normal Play Time (NPT).
Event_msg_type (message type): indicates an identifier for identifying the type of event message.
Data_event_id (message identification): This field indicates an identifier for identifying an individual event message.
Private_data_byte (private data): This field stores event message related information defined according to the value of event_msg_type defined for each data encoding method.

The transmitting device and the receiving device may be realized by a computer. In this case, the transmitting device and the receiving device are operated by causing the computer to operate as each unit of the transmitting device and the receiving device. The control program realized by the above and a computer-readable recording medium on which the control program is recorded also fall within the scope of the present invention.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope indicated in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

(Example of software implementation)
Finally, each block of the receiving device 3, particularly the component determination unit 32, may be realized in hardware by a logic circuit formed on an integrated circuit (IC chip), or using a CPU (Central Processing Unit). It may be realized by software.

In the latter case, the receiving device 3 includes a CPU that executes instructions of a program that realizes each function, a ROM (Read Only Memory) storing the program, a RAM (Random Access Memory) that expands the program, the program, and various A storage device (recording medium) such as a memory for storing data is provided. The object of the present invention is to record the program code (execution format program, intermediate code program, source program) of the control program of the transmission device 2 and the reception device 3 which are software for realizing the above-described functions so as to be readable by a computer. This can also be achieved by supplying the recording medium to the transmission apparatus 2 and the reception apparatus 3 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

Examples of the recording media include non-transitory tangible media, such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, and CD-ROM / MOs. Discs including optical disks such as / MD / DVD / CD-R, cards such as IC cards (including memory cards) / optical cards, and semiconductor memories such as mask ROM / EPROM / EEPROM (registered trademark) / flash ROM Alternatively, logic circuits such as PLD (Programmable Logic Device) and FPGA (Field Programmable Gate Array) can be used.

Further, the transmission device 2 and the reception device 3 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited as long as it can transmit the program code. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication network, etc. can be used. The transmission medium constituting the communication network may be any medium that can transmit the program code, and is not limited to a specific configuration or type. For example, even with wired lines such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL (Asymmetric Digital Subscriber Line) line, infrared such as IrDA and remote control, Bluetooth (registered trademark), IEEE 802.11 wireless, HDR ( It can also be used wirelessly such as High Data Rate (NFC), NFC (Near Field Communication), DLNA (Digital Living Network Alliance) (registered trademark), mobile phone network, satellite line, and terrestrial digital network. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

The present invention can be applied to TVs, tablet terminals, smartphones, and the like.

1, 1 ′

distribution system

2, 2 ′ transmission device (distribution device)
3, 3 'receiving device (reproducing device)
21, 21 ′ Content creation unit 22 Metadata storage unit 23 Broadcast transmission unit 31 Broadcast reception unit 32 Component determination unit (presentation type determination unit)
33 Operation part 34, 34 'Component separation part (presentation control part)
35 Video decoding unit 36

Audio decoding unit

37, 37 ′ Data

broadcast extraction unit

38, 38 ′ synthesis unit 39 Display 40

Speaker

51, 51 ′, 52, 52 ′, 52 ″ Component 53 Related data

Claims

A playback device for playing back content composed of a plurality of components,
A presentation type determination unit that determines the presentation type of each component using the presentation type information associated with each component;
A playback apparatus comprising: a presentation control unit that controls presentation of each component based on the presentation type determined by the presentation type determination unit.
The presentation type information is associated with a group consisting of all components,
The playback apparatus according to claim 1, wherein the presentation type determination unit presents each component belonging to the same group.
The presentation type information is associated with a group consisting of a plurality of all components,
The playback apparatus according to claim 1, wherein the presentation type determination unit presents each component belonging to the same group.
The playback apparatus according to claim 1, wherein the presentation type determination unit switches presentation to all the components or a plurality of components among all the components or to each of the components.
A distribution device that transmits a plurality of components used for content reproduction and presentation type information associated with each component to a reproduction device,
A distribution apparatus comprising: a transmission unit configured to transmit content including a plurality of components and the presentation type information of the components to the reproduction apparatus.