KR101052480B1 - Broadcast signal transceiver and method - Google Patents

Abstract

The present invention relates to an apparatus and method for transmitting and receiving broadcast signals in a terrestrial digital multimedia broadcasting system. The apparatus for transmitting broadcast signals includes a data storage unit for storing predetermined applications associated with DMB content, and a user interface among the stored predetermined applications. A synchronization and application information generator configured to generate synchronization and control information of an application corresponding to a user input signal input through the first encoder; a first encoder to generate a first transport stream by encoding data of the DMB content; and the data A second encoder configured to receive data of an application corresponding to the user input signal from a storage unit and to encode encoded data to generate encoded application data; and a multiplexed transport stream by multiplexing the first transport stream and the synchronization and control information. produce A multiplexer and a transmitter configured to receive the multiplexed transport stream and convert the stream mode data into the stream mode data, and to receive the encoded application data and convert the packet mode data into an ensemble multiplex of the stream mode data and the packet mode data. Include.

AV (Audio Video), Application, Multiplexing, Coding

Description

Broadcast Signal Transceiver and its method {TRANSMITTER-RECEIVER FOR BROADCASTING SIGNAL AND METHOD THEREOF}

The present invention relates to a broadcast signal transceiver and a method thereof, and more particularly, to a broadcast signal transceiver and a method in a terrestrial digital multimedia broadcasting system.

The present invention is derived from the research conducted as part of the IT new growth engine core technology development project of the Ministry of Information and Communication and the Ministry of Information and Communication Research and Development. [Task No. 2006-S-082-02, Title: Custom-Watched DMB Technology Development] ].

In general, broadcast refers to a form in which a broadcast signal is transmitted in an over-the-air format, and a broadcast signal is received using a fixed receiver in a home to receive respective contents. Such a broadcast system is being developed in a form that can provide a broadcast service for a mobile terminal at the moment due to the rapid development of technology.

Terrestrial Digital Multimedia Broadcasting (DMB), one of the broadcasting systems using a mobile terminal, is an ITU that includes video, text, etc. in addition to audio in Digital Audio Broadcasting (DAB). Refers to a service that has been renamed and used in Korea in accordance with the provisions of this Article.

The DMB is an advanced system that not only provides users with digitized information but also applies various frequencies in terms of quality and quantity. Accordingly, the number of subscribers of terrestrial DMB broadcasting has exceeded 16 million. Accordingly, DMB service providers and content providers are making great efforts to develop various DMB supplementary services and business models.

In general, terrestrial DMB broadcasting is provided with data services such as main AV (Audio Video) in stream mode and BWS (Broadcasting Website Service) and slideshow in packet mode. And all of them are recognized as independent services due to limitations of encoding or decoding technology and channel coding technology.

However, as the encoding or decoding technology and the channel coding technology of AV are developed in the future, the bandwidth that can be transmitted per channel of DMB broadcasting is expected to increase significantly. Accordingly, it is expected that the AV and the additional data services are not independent of each other, but the AV and the additional data services are possible together.

The present invention provides a transmission apparatus and method capable of providing a terrestrial DMB broadcast and various additional data together.

The present invention also provides a receiving apparatus and method capable of receiving terrestrial DMB broadcasting and additional data.

The present invention also provides an apparatus and method for managing additional data to be transmitted with the terrestrial DMB broadcast.

The apparatus for transmitting broadcast signals according to the present invention includes a data storage unit for storing predetermined applications associated with DMB content, and synchronization and control information of an application corresponding to a user input signal input through a user interface among the stored predetermined applications. A synchronization and application information generation unit for generating a data stream; a first encoder for generating a first transport stream by encoding data of the DMB content; and receiving data of an application corresponding to the user input signal from the data storage unit; A second encoder to encode and generate encoded application data, a multiplexer to generate a multiplexed transport stream by multiplexing the first transport stream and the synchronization and control information, and a stream mode to receive the multiplexed transport stream. Convert it to data, Is converted into packet mode data service receives the encoded group application data, and comprises the stream mode data transmission unit configured to ensemble multiplexing the packet-mode data.

The apparatus for receiving broadcast signals according to the present invention receives a broadcast signal including a transport stream multiplexed with synchronization and control information and encoded application data encoded with a first transport stream of DMB content and multiplexes the broadcast signal. A receiver for separating a transport stream and the encoded application data, a demultiplexer for demultiplexing the multiplexed transport stream into a standardized table including a first transport stream and the synchronization and control information; A synchronization and application information generator for extracting synchronization and control information of the application data from a table, a first decoder for decoding the first transport stream to generate the DMB content, and the encoded application delivered from the receiver Application data by decoding the data And a user input / output unit for displaying the DMB content and the application data together based on the synchronization and control information.

The broadcast signal transmission method according to the present invention comprises the steps of: (a) storing certain applications associated with DMB content; (b) generating synchronization and control information of an application corresponding to a user input signal input through a user interface among the stored predetermined applications; (c) encoding a data of the DMB content to generate a first transport stream; (d) encoding data of an application corresponding to the user input signal to generate encoded application data; (e) multiplexing the first transport stream and the synchronization and control information to generate a multiplexed transport stream; (f) converting the multiplexed transport stream into stream mode data and converting the encoded application data into packet mode data; And (g) ensemble multiplexing the stream mode data and the packet mode data for transmission.

The broadcast signal reception method according to the present invention comprises: (a) receiving a broadcast signal including an encoded first transport stream of DMB content and a transport stream multiplexed with synchronization and control information and encoded application data, and transmitting the multiplexed signal; Separating the stream into the encoded application data; (b) demultiplexing the multiplexed transport stream into a table in a standardized format including information of the first transport stream and the application data; (c) extracting synchronization and control information of the application data from the table; (d) decoding the first transport stream to generate the DMB content; (e) decoding the encoded application data to generate application data; And (f) displaying the DMB content and the application data together based on the synchronization and control information.

Using the apparatus for transmitting and receiving a broadcast signal according to the present invention and a method thereof, various additional data services such as BWS, slideshow, data push service, metadata, rich media data, etc. can be transmitted and received while watching terrestrial DMB broadcasting. There is an advantage to this. In addition, there is an advantage that a service capable of storing, managing, and distributing terrestrial DMB broadcasting and additional data services in a fused file format. In addition, there is an advantage that can synchronize the application associated with the terrestrial DMB broadcast.

1 is a block diagram of a broadcast signal transmission apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus 100 for transmitting broadcast signals according to an embodiment of the present invention includes an AV encoder 101, a data storage 102, a data encoder 103, a synchronization and application information generator. 104, a multiplexer 105, and a delivery system 106.

The AV encoder 101 receives raw DMB content. Hereinafter, for convenience of explanation, the description will be made with audio video (AV) data, which is one of DMB contents. The AV transport stream is generated by encoding the provided AV data, for example, streaming data or data in units of frames.

The data store 102 stores a plurality of applications associated with the AV. Preferably, a plurality of applications may generate, store, and manage an organized application list. The application list includes various applications related to the AV, and includes the name, type, and consumption environment information of each application. The type of application may include a BWS, a data push service, a slide show, a MOT slide show, and the like, and the consumption environment information of the application may include environment information of a mobile terminal or a fixed terminal.

In addition, the data storage unit 102 provides an application selected by the user to the data encoder 103 among various applications included in the application list.

The data encoder 103 encodes the application data provided from the data storage 102 into a transmission protocol that conforms to DAB or DMB transmission standards. The encoded application data is then provided to the delivery system 106.

The synchronization and application information generator 104 receives an application list from the data storage 102 when a request signal of an application list is received from a user through a user interface (not shown). In addition, the multiplexer 105 provides synchronization and control information of the application corresponding to the request signal input through the user interface in the provided application list. Here, the control information of the application may include information about a method of starting the application selected by the user. For example, it may include information such as start immediately or start by the user. In addition, the control information of the application may include channel information to which the application selected by the user is transmitted. For example, the information may include information such as ECC, EID, SID, and SIDS. In addition, the control information of the application may include information on whether the application selected by the user is paid or free. On the other hand, the synchronization information of the application means the schedule information of the application selected by the user. For example, this means schedule information of a start or end time of an application selected by a user.

The multiplexer 105 receives an AV transport stream from the AV encoder 101. In addition, the synchronization and application information generation unit 103 receives the synchronization information and the control information of the application. Then, the multiplexer 105 generates a table in a standardized format based on the synchronization information and the control information of the application. An example of a standardized table will be described with reference to Table 1 below. Table 1 is an example of an MPEG-2 TSDT structure. The transport stream description table (TSDT) is a private section table that contains synchronization and control information of an application.

Descriptor Name Contents Application signaling information In order to know which decoder should be initialized by the receiving device, the application type (DMB User Application Type) is described. Application control information Describes the control information of the application. For example, it can be controlled by being divided into automatic (event) start, registration, deregistration, and automatic end.

-Definition of Application_Control_Type.
TIME: Define application life cycle using application start time and duration.
TRIGGER: Define application life cycle through trigger event.
EVENT: Defines the application life cycle according to Application_Control_Code.
AUTOSTART: Provides service by executing application as soon as application control information is received.
PRESENT: Runs the application but does not work.
DESTROY: Stop the application.
KILL: terminate the application.
-Describes whether the application can be saved. Application Name Information Describe the application name and a brief description. Application location information -Describes the location information of the application transmitted in the packet mode or the stream mode of the data channel (eg ECC, EID, SID, SCID). Application Credentials -Describes information that can determine whether to consume the application according to the application permission information policy (grade, paid / free, etc.). Application execution environment information -Describe the environment information of the device that can play the application.

Referring to Table 1, the TSDT includes six descriptors describing the aforementioned information. The six descriptors include application signaling information describing what kind of application is being transmitted, application control information describing how to operate the application, application name information describing the name of the application and a brief description of the application. The application location information describing the transmission location, the application permission information for controlling the authority of the application, and the application execution environment information describing the environment information of the device that can finally play the application. Hereinafter, examples of each descriptor in Table 1 will be described in more detail.

Table 2 below shows an example of an application signaling descriptor, and is repeated by the number of applications transmitted. And it defines the type of application to be transmitted based on the ID of the application. In this case, the type of application preferably follows a user application type defined in the T-DMB standard.

Syntax No. of bits Identifier application_signalling_descriptor () { descriptor_tag 8 uimsbf descriptor_length 8 uimsbf version 4 uimsbf num_application_type 4 uimsbf for (i = 0; i <item_count; i ++) { application_id 8 uimsbf      user_application_type 11 uimsbf      reserved 5 bslbf      }  }

Table 3 below shows an example of an application control descriptor, and is repeated according to the number of applications transmitted. And the life cycle of the application is determined in the form of time or event based on the application ID. In addition, it is possible to control whether the application can be downloaded through the application storage flag.

Syntax No. of bits Identifier application_control_descriptor () { descriptor_tag 8 uimsbf descriptor_length 8 uimsbf version 4 uimsbf num_application_type 4 uimsbf application_control_type 2 uimsbf reserved 8 bslbf for (i = 0; i <item_count; i ++) { application_id 8 uimsbf If (application_control_type == TIME) { start_time 17 uimsbf duration 15 uimsbf } else if (application_control_type == EVENT) { application_control_code 8 uimsbf }      application_storage_flag One uimsbf      reserved 7 bslbf    }  }

Table 4 below shows an example of an application name descriptor, and is repeated according to the number of applications to be transmitted. In addition, the name of the application transmitted based on the ID of the application may be described.

Syntax No. of bits Identifier data_descriptor () { descriptor_tag 8 uimsbf descriptor_length 8 uimsbf version 4 uimsbf num_application_type 4 uimsbf for (i = 0; i <item_count; i ++) { application_id 8 uimsbf ISO_639_language_code 24 uimsbf application_name_length 8 uimsbf for (i = 0; i <item_count; i ++) {           application_name_char 8 uimsbf      }    }  }

Table 5 below shows an example of an application location descriptor, and is repeated according to the number of applications to be transmitted. In addition, it may include information about Extended Conntry Code (ECC), Ensemble Identifier (EId), Service Identifier (Sid), and Service Component Identifier within the Service (SCIdS). have.

Syntax No. of bits Identifier data_descriptor () { descriptor_tag 8 uimsbf descriptor_length 8 uimsbf version 4 uimsbf num_application_type 4 uimsbf for (i = 0; i <item_count; i ++) { application_id 8 uimsbf ECC 8 uimsbf EId 16 uimsbf SId 32 SCIdS 4 reserved 4 }    }  }

On the other hand, the application authority descriptor and the execution environment descriptor may be defined including a receiver or system type, an operating system (OS), a CPU, the presence or absence of a local storage medium, a screen size, a touch pad, and the like.

In addition, the multiplexer 105 multiplexes the AV transport stream and the generated TSDT to generate one AV transport stream. The multiplexed AV transport stream is then provided to the delivery system 106.

The TSDT may be previously generated by the synchronization and application information generator 103 and provided to the multiplexer 105.

The transmission system 106 receives the multiplexed AV transport stream and converts it into stream mode data, and receives encoded application data provided from the data encoder 103 to convert the packet mode data. The converted stream mode data and the packet mode data are ensemble multiplexed, and the ensemble multiplexed data is modulated and transmitted to the outside through a DAB or DMB channel.

Next, an operation of the apparatus for transmitting broadcast signals according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

2 is a flowchart illustrating an operation of a broadcast signal transmission apparatus according to an embodiment of the present invention.

First, the data storage 102 receives a plurality of applications that can be played with the AV, generates an application list, and stores the application list (220). Here, as a method of storing a plurality of application data may have a variety of methods from the skilled person's point of view, it is not limited to the various applications stored in the application list. Here, the application list is determined by the user, that is, the user who selects the application to be synchronized with the AV to be transmitted. The application list may include the name, type, application consumption environment information, etc. of each application.

Next, if there is a request signal of the application list from the user through the user interface, the application list is provided to the synchronization and application information generation unit 104. If the user selects an application to be transmitted with the AV from the provided application list (230), the synchronization and application information generating unit 104 generates the synchronization and control information of the selected application (240). Then, the synchronization and application information generation unit 104 generates a TSDT including the synchronization and control information of the application (250). Here, the TSDT may be generated by the multiplexer 105 provided with the synchronization and control information of the application. Then, the generated TSDT is generated by the AV encoder 101 (210) and multiplexed with the AV transport stream input to the multiplexer 105 (260). The multiplexed AV transport stream is provided to the delivery system 106.

Meanwhile, when the user selects an application to be transmitted together with the AV from the provided application list, the data storage unit 102 provides the selected application data to the data encoder 102. Then, the data encoder 103 encodes the received application data into a transmission protocol conforming to the DAB or DMB transmission standard (270), and provides the encoded application data to the transmission system 106.

Then, the transmission system 106 converts the multiplexed AV transport stream into stream mode data, converts the encoded application data into packet mode data, ensemble multiplexes them, modulates the multiplexed data upward, and sends it out. (280).

3 is a block diagram of a broadcast signal receiving apparatus according to another embodiment of the present invention.

Referring to FIG. 3, the apparatus 300 for receiving broadcast signals according to another embodiment of the present invention includes a reception system 301, a demultiplexer 302, an AV decoder 303, a data encoder 304, A storage unit 305, a synchronization and application information processor 306, and a user input / output unit 307.

The reception system 301 receives a broadcast signal through a DAB or DMB channel. The received broadcast signal is separated into stream mode data and packet mode data. That is, the multiplexed AV transport stream received in the stream mode data and the encoded application data received in the packet mode are separated. The multiplexed AV transport stream is provided to the demultiplexer 302, and the encoded application data is provided to the data decoder 303.

The demultiplexer 302 receives the multiplexed AV transport stream and demultiplexes it into an AV transport stream and a TSDT. The AV transport stream is provided to the AV decoder 303 and the TSDT is provided to the synchronization and application information processor 306.

The AV decoder 303 receives the AV transport stream and decodes it to generate main AV data. The generated AV data is provided to the user input / output unit 307.

The data decoder 304 receives encoded application data and decodes the generated application data to generate application data in a form that can be output to a display unit included in the user input / output unit 307. The generated application data is provided to the user input / output unit 306.

The synchronization and application information processing unit 306 extracts synchronization and control information of the application from the provided TSDT. In addition, the synchronization and application information processing unit 306 receives the user input information input from the TSDT and the user input / output unit 307 and generates header information of the DMB-AF file. The header information of the generated DMB-AF file is provided to the storage unit 305.

The storage unit 305 synchronizes the multiplexed AV transport stream output from the reception system 301, the AV transport stream output from the demultiplexer 302, and the application data output from the data decoder 303. And the header information of the DMB-AF file generated by the application information generation unit 305 and stores the header information of the DMB-AF file.

The user input / output unit 307 displays the name, type, content, etc. of the application on the display unit based on the synchronization and control information of the application provided from the synchronization and application information processing unit 306 together with the AV data. How the AV data and the application are specifically displayed on the display unit will be described later with reference to FIG. 5. In addition, the user input / output unit 307 manages an application to execute or terminate the corresponding application when a user event for the application displayed on the display unit occurs.

Next, an operation of the broadcast signal receiving apparatus according to another embodiment of the present invention will be described in detail with reference to FIG. 4.

4 is a flowchart illustrating an operation of a broadcast signal receiving apparatus according to another embodiment of the present invention.

First, when the broadcast signal is received by the reception system 301 (410), the received broadcast signal is separated into stream mode data and packet mode data. That is, the multiplexed AV transport stream received in the stream mode and the encoded application data received in the packet mode are separated (420). In operation 430, the demultiplexer 302 demultiplexes the multiplexed AV transport stream into an AV transport stream and a TSDT. Meanwhile, the data decoder 304 generates application data by decoding the encoded application data (440). The AV transport stream separated by the demultiplexer 302 is provided to the AV decoder 403, where the AV transport stream is decoded to generate AV data (450). The TSDT is provided to the synchronization and application information processing unit 306, and the synchronization and application information processing unit 306 extracts synchronization information and control information of the application from the TSDT (460). Then, the user input / output unit 307 receives the AV data, application synchronization information and control information, and application data, and displays the main AV and the application on the screen based on the received information (470).

Although not shown in FIG. 4, the storage unit 305 receives the multiplexed AV transport stream, application data, AV transport stream, and DMB-AF header information and stores them in the form of a DMB-AF file.

5 is a diagram illustrating an example in which an actual AV and an application are expressed together in a broadcast signal receiving apparatus according to another embodiment of the present invention.

Basically, the display unit is divided into an AV reproduction region 510 and a data and application reproduction region 520. When the aforementioned application synchronization and control information arrives, the icon 'P' 530 or a character string that recognizes the same is activated at the upper right of the AV playback area 510. When the user selects an activated icon or a recognized character string 530 through the user interface, various application lists associated with the AV are displayed in the data and application playback area 520. There may be various ways for the user to select an event displayed in the data and application playback area 520. For example, the display unit may be configured as a touch screen so that a user may directly select an event using his or her hand or a tool, or may select an event through a user interface. The application may be operated or terminated by the user's event selection. In some cases, the application may be automatically executed and terminated automatically. In addition, the application displayed on the display is only valid until the associated AV is broadcast, and it is preferable that all applications are automatically terminated when the broadcast ends.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

1 is a block diagram of a broadcast signal transmission apparatus according to an embodiment of the present invention;

2 is a flowchart illustrating an operation of a broadcast signal transmitting apparatus according to an embodiment of the present invention;

3 is a block diagram of a broadcast signal receiving apparatus according to another embodiment of the present invention;

4 is a flowchart illustrating an operation of a broadcast signal receiving apparatus according to another embodiment of the present invention;

5 is a diagram illustrating an example in which an actual AV and an application are expressed together in a broadcast signal receiving apparatus according to another embodiment of the present invention.

Claims (13)

In the broadcast signal transmission apparatus, A data storage for storing certain applications associated with the DMB content; A synchronization and application information generator for generating synchronization and control information of an application corresponding to a user input signal input through a user interface among the stored predetermined applications; A first encoder which encodes data of the DMB content to generate a first transport stream; A second encoder which receives encoded data of an application corresponding to the user input signal from the data storage and encodes the encoded data to generate encoded application data; A multiplexer configured to multiplex the first transport stream and the synchronization and control information to generate a multiplexed transport stream; And a transmitter configured to receive the multiplexed transport stream and convert the stream mode data into the stream mode data, convert the received application data into packet mode data, and ensemble the stream mode data and the packet mode data. Transmitter. The method of claim 1, The data storage unit, And a broadcast signal transmitting apparatus storing a content list including the predetermined applications. The method of claim 1, The synchronization and application information generation unit, Generate a table in a standardized format including the synchronization and control information, The multiplexer, And a broadcast signal transmission apparatus multiplexing the table with the first transport stream. The method of claim 1, The multiplexer, And generating a table in a standardized format including the synchronization and control information, and multiplexing the table with the first transport stream. The method of claim 1, The synchronization and control information, And signaling information of the application, information of a start method, channel information, authority information, name information, execution environment information, and schedule information. In the broadcast signal receiving apparatus, Receives a broadcast signal including a transport stream multiplexed with synchronization and control information of the DMB content and application data encoded therein, and separates the broadcast signal into the multiplexed transport stream and the encoded application data. Receiving unit to say, A demultiplexer for demultiplexing the multiplexed transport stream into a standardized table including a first transport stream and the synchronization and control information; A synchronization and application information generation unit for extracting synchronization and control information of the application data from the table; A first decoder to decode the first transport stream to generate the DMB content; A second decoder which decodes the encoded application data transmitted from the receiver to generate application data; And a user input / output unit configured to display the DMB content and the application data together based on the synchronization and control information. The method of claim 6, The synchronization and application information generation unit, Generating a DMB-AF header file using the user input information received through the user input / output unit and the table; And a storage unit configured to receive the multiplexed transport stream, the first transport stream, the application data, and the DMB-AF header information to generate and store a DMB-AF file. In the broadcast signal transmission method, (a) storing certain applications associated with the DMB content; (b) generating synchronization and control information of an application corresponding to a user input signal input through a user interface among the stored predetermined applications; (c) encoding a data of the DMB content to generate a first transport stream; (d) encoding data of an application corresponding to the user input signal to generate encoded application data; (e) multiplexing the first transport stream and the synchronization and control information to generate a multiplexed transport stream; (f) converting the multiplexed transport stream into stream mode data and converting the encoded application data into packet mode data; And (g) ensemble multiplexing and transmitting the stream mode data and the packet mode data Broadcast signal transmission method comprising a. delete The method of claim 8, In step (b), Generate a table in a standardized format including the synchronization and control information, In step (e), And a broadcast signal transmission method for multiplexing the table and the first transport stream. delete In the broadcast signal receiving method, (a) receiving a broadcast signal including a transport stream multiplexed with synchronization and control information of the DMB content and application data encoded therein and separating the multiplexed transport stream into the encoded application data; step; (b) demultiplexing the multiplexed transport stream into a table in a standardized format including information of the first transport stream and the application data; (c) extracting synchronization and control information of the application data from the table; (d) decoding the first transport stream to generate the DMB content; (e) decoding the encoded application data to generate application data; And (f) displaying the DMB content and the application data together based on the synchronization and control information; Broadcast signal receiving method comprising a. delete

Images