WO2009061150A2 - Apparatus and method for storing broadcasting content in dmb system - Google Patents

Apparatus and method for storing broadcasting content in dmb system Download PDF

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Publication number
WO2009061150A2
WO2009061150A2 PCT/KR2008/006574 KR2008006574W WO2009061150A2 WO 2009061150 A2 WO2009061150 A2 WO 2009061150A2 KR 2008006574 W KR2008006574 W KR 2008006574W WO 2009061150 A2 WO2009061150 A2 WO 2009061150A2
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WIPO (PCT)
Prior art keywords
content
recording
status information
information
recording status
Prior art date
Application number
PCT/KR2008/006574
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French (fr)
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WO2009061150A3 (en
Inventor
Min-Sik Park
Han Kyu Lee
Jin Woo Hong
Hyunsoon Kim
Daebok Kwon
Yong Jin Lim
Hyeong Chic Cho
Original Assignee
Electronics And Telecommunications Research Institute
Korean Broadcasting System
Changhaeenergeering, Ltd.
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Application filed by Electronics And Telecommunications Research Institute, Korean Broadcasting System, Changhaeenergeering, Ltd. filed Critical Electronics And Telecommunications Research Institute
Publication of WO2009061150A2 publication Critical patent/WO2009061150A2/en
Publication of WO2009061150A3 publication Critical patent/WO2009061150A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17318—Direct or substantially direct transmission and handling of requests
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4334—Recording operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4348—Demultiplexing of additional data and video streams
    • H04N21/4349—Demultiplexing of additional data and video streams by extracting from data carousels, e.g. extraction of software modules from a DVB carousel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64315—DVB-H
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/8126—Monomedia components thereof involving additional data, e.g. news, sports, stocks, weather forecasts
    • H04N21/8133—Monomedia components thereof involving additional data, e.g. news, sports, stocks, weather forecasts specifically related to the content, e.g. biography of the actors in a movie, detailed information about an article seen in a video program

Definitions

  • the present invention relates to an apparatus and method for storing content in a Digital Multimedia Broadcasting (DMB), particularly, to an apparatus and method in which a receiver of a DMB system accurately stores a corresponding content according to recording status information transmitted in real time together with the content from a broadcasting station.
  • DMB Digital Multimedia Broadcasting
  • DMB Digital Multimedia Broadcasting
  • DMB Digital Multimedia Broadcasting
  • BSAC MPEG-4 Bit Sliced Arithmetic Coding
  • BIFS MPEG-4- Binary Format for Scenes
  • the DMB broadcasting channel similar to a Digital Television (DTV), and provides Electronic Content Guide (ECG) with respect to the table of program schedule to a user through the Internet or a broadcasting channel, thereby increasing convenience of use.
  • ECG information may include content reference identification information, channel information, start time and broadcast duration information for a corresponding channel, and the like.
  • a DMB receiver provides a service that enables the use to watch the content in real time without limit of a place as well as a content recording service that enables the user to watch the content without limit of a watching time. It may happen that a content recorded by a conventional DMB receiver may not be accurately replayed from a start of the content but replayed before and after the start, and may be ended before and after the end, since the broadcasting station may not accurately broadcast the corresponding content according to a scheduled time in ECG information announced from the broadcasting station. When the broadcasting station changes the scheduled time, the scheduled time may not be provided to the user in real time with the scheduled time updating, or the content replayed by the broadcasting station in real time may not accurately end according to the scheduled time. Therefore, a difference between a scheduled time in the announced ECG and an actual broadcasting time may occur.
  • the broadcasting station informs a DMB receiver of recording status information in real time when transmitting contents, the recording status information including content reference identification information to identify the transmitted content and start/end time information about when the corresponding content accurately starts and ends.
  • the DMB receiver may not record the corresponding content according to an arranged time for broadcasting contents that may not be accurate, but may record the corresponding content based on the recording status information that is transmitted from the broadcasting station in real time.
  • An aspect of the present invention provides an apparatus and method for storing content in a Digital Multimedia broadcasting (DMB).
  • DMB Digital Multimedia broadcasting
  • Another aspect of the present invention provides an apparatus and method in which a receiver of a DMB system accurately stores corresponding content according to recording status information transmitted together with the content from a broadcasting * station.
  • Another aspect of the present invention provides an apparatus and method in which a receiver for receiving content stores the content from an accurate start time to an accurate end time when a broadcasting station transmits content with metadata including content reference identification information, content start time, broadcast duration information, and current recording information.
  • an apparatus for storing broadcasting content including an ensemble demultiplexer to extract Transport Streams (TSs) from received broadcasting signals, a TS demultiplexer to separately extract TSs including content and TSs including recording status information from the TSs extracted by the ensemble demultiplexer, a section processing unit to analyze the recording status information, a content storing unit to store the content, and a controlling unit to control storing of content for which recording is requested in the content storing unit through checking a start and an end of the recording-requested content in real time using the analyzed recording status information.
  • TSs Transport Streams
  • a method for storing broadcasting content including extracting TSs from received broadcasting signals, separately extracting TSs including content and TSs including recording status information from the TSs extracted from received broadcasting signals, analyzing the recording status information, verifying whether a current recording information value included in the recording status information of the corresponding content signifies record, and storing the extracted TSs including content when the current recording information value signifies record.
  • a method for generating broadcasting signals including generating recording status information that verifies whether content is currently replayed, generating a TS including the content and a TS including the recording status information, and generating a broadcasting signal including the TS including the content and the TS including the recording status information.
  • the apparatus for storing content in DMB system includes an RF receiver to receive and demodulate broadcasting signals, an ensemble demultiplexer to extract Transport Streams (TSs) from the demodulated broadcasting signals, a TS demultiplexer to separately extract TSs including content and TSs including recording status information from the TSs extracted by the ensemble demultiplexer, a section processing unit to analyze the recording status information, a content storing unit to store the content, and a controlling unit to control storing of content for which recording is requested in the content storing unit through checking a start and an end of the recording-requested content in real time using the analyzed recording status information.
  • TSs Transport Streams
  • FIG. 1 illustrates a configuration of an apparatus for storing content in a DMB system according to example embodiment
  • FIG. 2 illustrates a configuration of a content labeling descriptor that writes content reference identification information and a start time and broadcast duration information of corresponding broadcasting content
  • FIG. 3 illustrates a configuration of an Motion Picture Experts Group (MPEG)- 2 Transport Stream Description Table (TSDT) including the content labeling descriptor; and
  • MPEG Motion Picture Experts Group
  • TSDT Transport Stream Description Table
  • FIG 4 is a flowchart illustrating a process of storing content in an apparatus for storing content for accurate broadcast duration.
  • Example embodiments of the present invention relate to an apparatus and method in which a receiver for receiving contents stores the content from an accurate start time to an accurate end time when a broadcasting station transmits content with metadata including content reference identification information, content start time, broadcast duration information, and current recording information.
  • FIG. 1 illustrates a configuration of an apparatus for storing content in a DMB system according to example embodiments.
  • the apparatus for storing content includes a controlling unit 100, a Radio Frequency (RF) receiver 102, an ensemble demultiplexer 104, a Transport Stream (TS) demultiplexer 106, a section processing unit 108, and a content storing unit 110.
  • RF Radio Frequency
  • TS Transport Stream
  • the RF receiver 102 receives Digital Multimedia Broadcasting (DMB) signals of a channel bandwidth controlled by the controlling unit 100, demodulates the received broadcasting signals, and transmits the demodulated broadcasting signals to the ensemble demultiplexer 104.
  • DMB Digital Multimedia Broadcasting
  • the ensemble demultiplexer 104 extracts Motion Picture Experts Group (MPEG)-2-Transport Streams (TSs) from the demodulated broadcasting signals to transmit the extracted signals to the TS demultiplexer 106.
  • MPEG Motion Picture Experts Group
  • TSs Motion Picture Experts Group
  • the TS demultiplexer 106 separately extracts MPEG-2-TSs including content and MPEG-2-TSs including content recording status information (content reference identification information, content start time, broadcast duration information, and current recording information) from the MPEG-2 TSs extracted by the ensemble demultiplexer.
  • content recording status information content reference identification information, content start time, broadcast duration information, and current recording information
  • the TS demultiplexer 106 provides the MPEG-2 TSs including the recording status information to the section processing unit 108 and stores the MPEG-2 TSs including the content (namely, content) in the content storing unit according to the controlling unit 100.
  • the section processing unit 108 analyzes the MPEG-2-TSs including the recording status information to check the content reference identification information, content start time, broadcast duration information and current recording information included in the recording status information, and provides the checked information to the controlling unit 100.
  • the content storing unit 110 stores content provided from the TS demultiplexer
  • the controlling unit 100 is requested to record content from a user, and when a current time is a start time of corresponding content for which recording is requested, the controlling unit 100 controls the RF receiver 102 and changes a bandwidth of a reception channel into a bandwidth of a channel that receives the corresponding recording-requested content.
  • the controlling unit 100 checks the current recording information included in the recording status information and stores the corresponding content in the content storing unit 110 for the duration that the current recording information has a record value.
  • the recording status information of the content is composed of content reference identification information, corresponding content start time, broadcast duration information, and current recording information. Also, the recording status information is stored in the MPEG-2 descriptor of FIG. 2 included in a Transport Stream Description Table (TSDT) of an MPEG-2 system, and transmitted to the apparatus for storing the content.
  • TSDT Transport Stream Description Table
  • FIG. 2 illustrates a configuration of a content labeling descriptor that writes content reference identification information and a start time and broadcast duration information of corresponding broadcasting content.
  • FIG. 2 illustrates an expansion descriptor of a content labeling descriptor defined in an ISO/IEC MPEG-2 system Amendment 1 , which is expansively defined so as to include content start time and broadcast duration information. Main fields with respect to the content labeling descriptor are described in Table 1 as below.
  • FIG. 3 illustrates a configuration of an MPEG-2 TSDT including the content labeling descriptor.
  • the TSDT defined in the MPEG-2 System Standard is transmitted, in which table id is set to 0 X 03 and PID is set to 0 x 0002.
  • FIG. 4 is a flowchart illustrating a process of storing content in an apparatus for storing content for accurate broadcast duration.
  • the apparatus for storing content proceeds with operation 402 to verify whether a current time is an expected broadcast start time of the corresponding content.
  • the apparatus proceeds with operation 404 to change a current bandwidth to a bandwidth of a channel that receives the corresponding recording-requested content.
  • the apparatus for storing content receives and demodulates broadcasting signals in operation 406, ensemble demultiplexes the demodulated signals to extract
  • MPEG-2 TSs in operation 408 and separately extracts MPEG-2 TSs including content and MPEG-2 TSs including recording status information from the MPEG-2-TSs extracted through ensemble demultiplexing in operation 410.
  • the apparatus for storing content verifies whether a current recording information value included in the recording status information signifies end in operation 412. As a result of the verification, when the current recording information value included in the recording status information signifies end, the apparatus proceeds with operation 416. Operation 416 will be described after description of operation 414.
  • the apparatus proceeds with operation 414 to store MPEG-2 TSs including extracted content (namely, corresponding content), and verifies whether the current recording information value is changed from record to end in operation 416.
  • operation 416 the current recording information value is changed from record to end, a reserved-recording algorithm is ended.
  • the apparatus returns to operation 406 to performs operations 406 to 416 and repeats the operations until the current recording information value signifies the value changed from record to end.
  • the method for storing content in a DMB system may be recorded computer- readable media including program instructions to implement various operations embodied by a computer.
  • the media may also include, alone or in combination with the program instructions, data files, data structures, and the like.
  • the described hardware devices may be configured to act as one or more software modules in order to perform the operations and methods described above, or vice versa.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Circuits Of Receivers In General (AREA)
  • Television Signal Processing For Recording (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Disclosed relates to an apparatus and method for storing content in a DMB system. The apparatus for storing content in DMB system includes an RF receiver to receive and demodulate broadcasting signals, an ensemble demultiplexer to extract Transport Streams (TSs) from the demodulated broadcasting signals, a TS demultiplexer to separately extract TSs including content and TSs including recording status information from the TSs extracted by the ensemble demultiplexer, a section processing unit to analyze the recording status information, a content storing unit to store the content, and a controlling unit to control storing of content for which recording is requested in the content storing unit through checking a start and an end of the recording-requested content in real time using the analyzed recording status information.

Description

APPARATUS AND METHOD FOR STORING BROADCASTING CONTENT IN
DMB SYSTEM
Technical Field The present invention relates to an apparatus and method for storing content in a Digital Multimedia Broadcasting (DMB), particularly, to an apparatus and method in which a receiver of a DMB system accurately stores a corresponding content according to recording status information transmitted in real time together with the content from a broadcasting station. This work was supported by the IT R&D program of MIC/IITA [2006-S-082-02,
Development of Digital Multimedia Broadcasting Technology for Personalized Broadcasting].
Background Art A terrestrial Digital Multimedia Broadcasting (DMB) provides a multimedia service in addition to digital audio service based on European EUREKA- 147 Digital Audio Broadcasting (DAB). In the multimedia service, MPEG-4 Bit Sliced Arithmetic Coding (BSAC) is applied to audio, MPEG-4 AVC is applied to video, and MPEG-4- Binary Format for Scenes (BIFS). A broadcasting station makes a table of program schedule with respect to a
DMB broadcasting channel similar to a Digital Television (DTV), and provides Electronic Content Guide (ECG) with respect to the table of program schedule to a user through the Internet or a broadcasting channel, thereby increasing convenience of use. Here, the ECG information may include content reference identification information, channel information, start time and broadcast duration information for a corresponding channel, and the like.
A DMB receiver provides a service that enables the use to watch the content in real time without limit of a place as well as a content recording service that enables the user to watch the content without limit of a watching time. It may happen that a content recorded by a conventional DMB receiver may not be accurately replayed from a start of the content but replayed before and after the start, and may be ended before and after the end, since the broadcasting station may not accurately broadcast the corresponding content according to a scheduled time in ECG information announced from the broadcasting station. When the broadcasting station changes the scheduled time, the scheduled time may not be provided to the user in real time with the scheduled time updating, or the content replayed by the broadcasting station in real time may not accurately end according to the scheduled time. Therefore, a difference between a scheduled time in the announced ECG and an actual broadcasting time may occur.
One of various methods for solving this problem is that the broadcasting station informs a DMB receiver of recording status information in real time when transmitting contents, the recording status information including content reference identification information to identify the transmitted content and start/end time information about when the corresponding content accurately starts and ends. The DMB receiver may not record the corresponding content according to an arranged time for broadcasting contents that may not be accurate, but may record the corresponding content based on the recording status information that is transmitted from the broadcasting station in real time.
Disclosure of Invention Technical Goals An aspect of the present invention provides an apparatus and method for storing content in a Digital Multimedia broadcasting (DMB).
Another aspect of the present invention provides an apparatus and method in which a receiver of a DMB system accurately stores corresponding content according to recording status information transmitted together with the content from a broadcasting* station.
Another aspect of the present invention provides an apparatus and method in which a receiver for receiving content stores the content from an accurate start time to an accurate end time when a broadcasting station transmits content with metadata including content reference identification information, content start time, broadcast duration information, and current recording information. Technical solutions
According to an aspect of the present invention, there is provided an apparatus for storing broadcasting content, the apparatus including an ensemble demultiplexer to extract Transport Streams (TSs) from received broadcasting signals, a TS demultiplexer to separately extract TSs including content and TSs including recording status information from the TSs extracted by the ensemble demultiplexer, a section processing unit to analyze the recording status information, a content storing unit to store the content, and a controlling unit to control storing of content for which recording is requested in the content storing unit through checking a start and an end of the recording-requested content in real time using the analyzed recording status information.
According to an aspect of the present invention, there is provided a method for storing broadcasting content, the method including extracting TSs from received broadcasting signals, separately extracting TSs including content and TSs including recording status information from the TSs extracted from received broadcasting signals, analyzing the recording status information, verifying whether a current recording information value included in the recording status information of the corresponding content signifies record, and storing the extracted TSs including content when the current recording information value signifies record.
According to an aspect of the present invention, there is provided a method for generating broadcasting signals, the method including generating recording status information that verifies whether content is currently replayed, generating a TS including the content and a TS including the recording status information, and generating a broadcasting signal including the TS including the content and the TS including the recording status information.
Advantageous Effects According to example embodiments, there may be a provided an apparatus and method for storing content in a Digital Multimedia broadcasting (DMB) system. The apparatus for storing content in DMB system includes an RF receiver to receive and demodulate broadcasting signals, an ensemble demultiplexer to extract Transport Streams (TSs) from the demodulated broadcasting signals, a TS demultiplexer to separately extract TSs including content and TSs including recording status information from the TSs extracted by the ensemble demultiplexer, a section processing unit to analyze the recording status information, a content storing unit to store the content, and a controlling unit to control storing of content for which recording is requested in the content storing unit through checking a start and an end of the recording-requested content in real time using the analyzed recording status information.
Brief Description of Drawings
FIG. 1 illustrates a configuration of an apparatus for storing content in a DMB system according to example embodiment;
FIG. 2 illustrates a configuration of a content labeling descriptor that writes content reference identification information and a start time and broadcast duration information of corresponding broadcasting content;
FIG. 3 illustrates a configuration of an Motion Picture Experts Group (MPEG)- 2 Transport Stream Description Table (TSDT) including the content labeling descriptor; and
FIG 4 is a flowchart illustrating a process of storing content in an apparatus for storing content for accurate broadcast duration.
Best Mode for Carrying Out the Invention
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.
Example embodiments of the present invention relate to an apparatus and method in which a receiver for receiving contents stores the content from an accurate start time to an accurate end time when a broadcasting station transmits content with metadata including content reference identification information, content start time, broadcast duration information, and current recording information.
FIG. 1 illustrates a configuration of an apparatus for storing content in a DMB system according to example embodiments. Referring to FIG. 1, the apparatus for storing content includes a controlling unit 100, a Radio Frequency (RF) receiver 102, an ensemble demultiplexer 104, a Transport Stream (TS) demultiplexer 106, a section processing unit 108, and a content storing unit 110.
The RF receiver 102 receives Digital Multimedia Broadcasting (DMB) signals of a channel bandwidth controlled by the controlling unit 100, demodulates the received broadcasting signals, and transmits the demodulated broadcasting signals to the ensemble demultiplexer 104.
The ensemble demultiplexer 104 extracts Motion Picture Experts Group (MPEG)-2-Transport Streams (TSs) from the demodulated broadcasting signals to transmit the extracted signals to the TS demultiplexer 106.
The TS demultiplexer 106 separately extracts MPEG-2-TSs including content and MPEG-2-TSs including content recording status information (content reference identification information, content start time, broadcast duration information, and current recording information) from the MPEG-2 TSs extracted by the ensemble demultiplexer.
Also, the TS demultiplexer 106 provides the MPEG-2 TSs including the recording status information to the section processing unit 108 and stores the MPEG-2 TSs including the content (namely, content) in the content storing unit according to the controlling unit 100. The section processing unit 108 analyzes the MPEG-2-TSs including the recording status information to check the content reference identification information, content start time, broadcast duration information and current recording information included in the recording status information, and provides the checked information to the controlling unit 100. The content storing unit 110 stores content provided from the TS demultiplexer
106 according to control of the controlling unit 100.
The controlling unit 100 is requested to record content from a user, and when a current time is a start time of corresponding content for which recording is requested, the controlling unit 100 controls the RF receiver 102 and changes a bandwidth of a reception channel into a bandwidth of a channel that receives the corresponding recording-requested content. Next, when receiving status information of the corresponding content from the section processing unit 108, the controlling unit 100 checks the current recording information included in the recording status information and stores the corresponding content in the content storing unit 110 for the duration that the current recording information has a record value.
The recording status information of the content is composed of content reference identification information, corresponding content start time, broadcast duration information, and current recording information. Also, the recording status information is stored in the MPEG-2 descriptor of FIG. 2 included in a Transport Stream Description Table (TSDT) of an MPEG-2 system, and transmitted to the apparatus for storing the content.
FIG. 2 illustrates a configuration of a content labeling descriptor that writes content reference identification information and a start time and broadcast duration information of corresponding broadcasting content.
FIG. 2 illustrates an expansion descriptor of a content labeling descriptor defined in an ISO/IEC MPEG-2 system Amendment 1 , which is expansively defined so as to include content start time and broadcast duration information. Main fields with respect to the content labeling descriptor are described in Table 1 as below.
[Table 1]
Figure imgf000008_0001
Figure imgf000009_0001
FIG. 3 illustrates a configuration of an MPEG-2 TSDT including the content labeling descriptor.
The TSDT defined in the MPEG-2 System Standard is transmitted, in which table id is set to 0 X 03 and PID is set to 0 x 0002.
Main fields of the TSDT are described as in Table 2 as below. [Table 2]
Figure imgf000010_0001
Hereinafter, a method for storing content in a DMB system according to the present invention configured as described above is described referring to drawings.
FIG. 4 is a flowchart illustrating a process of storing content in an apparatus for storing content for accurate broadcast duration.
Referring to FIG. 4, when receiving a request for reserved recording of content in operation 400, the apparatus for storing content proceeds with operation 402 to verify whether a current time is an expected broadcast start time of the corresponding content.
As a result of the verification, when the current time is the expected broadcast stat time of the corresponding content, the apparatus proceeds with operation 404 to change a current bandwidth to a bandwidth of a channel that receives the corresponding recording-requested content.
Next, the apparatus for storing content receives and demodulates broadcasting signals in operation 406, ensemble demultiplexes the demodulated signals to extract
MPEG-2 TSs in operation 408, and separately extracts MPEG-2 TSs including content and MPEG-2 TSs including recording status information from the MPEG-2-TSs extracted through ensemble demultiplexing in operation 410.
The apparatus for storing content verifies whether a current recording information value included in the recording status information signifies end in operation 412. As a result of the verification, when the current recording information value included in the recording status information signifies end, the apparatus proceeds with operation 416. Operation 416 will be described after description of operation 414.
As the result of the verification, when the current recording information value signifies record, the apparatus proceeds with operation 414 to store MPEG-2 TSs including extracted content (namely, corresponding content), and verifies whether the current recording information value is changed from record to end in operation 416. As a result of operation 416, the current recording information value is changed from record to end, a reserved-recording algorithm is ended.
However, as the result of operation 416, when the current recording information value is a value excluding the value changed from record to end, namely, a value signifying record and a value continuously maintaining a previous status and signifying end, the apparatus returns to operation 406 to performs operations 406 to 416 and repeats the operations until the current recording information value signifies the value changed from record to end.
The method for storing content in a DMB system may be recorded computer- readable media including program instructions to implement various operations embodied by a computer. The media may also include, alone or in combination with the program instructions, data files, data structures, and the like. The described hardware devices may be configured to act as one or more software modules in order to perform the operations and methods described above, or vice versa. Although a few embodiments of the present invention have been shown and described, the present invention is not limited to the described embodiments. Instead, it would be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An apparatus for storing broadcasting content, the apparatus comprising: an ensemble demultiplexer to extract Transport Streams (TSs) from received broadcasting signals; a TS demultiplexer to separately extract TSs including content and TSs including recording status information from the TSs extracted by the ensemble demultiplexer; a section processing unit to analyze the recording status information; a content storing unit to store the content; and a controlling unit to control storing of content for which recording is requested in the content storing unit through checking a start and an end of the recording- requested content in real time using the analyzed recording status information.
2. The apparatus of claim 1, wherein the recording status information includes content reference identification information, content start time, broadcast duration information, and current recording information.
3. The apparatus of claim 2, wherein the controlling unit stores received content when a current recording information value of the requested content signifies record.
4. The apparatus of claim 1, wherein the recording status information is received with the recording status being stored in a content labeling descriptor included in a Motion Picture Experts Group (MPEG)-2 -Transport Stream Description Table (TSDT).
5. A method for storing broadcasting content, the method comprising: extracting TSs from received broadcasting signals; separately extracting TSs including content and TSs including recording status information from the TSs extracted from received broadcasting signals; analyzing the recording status information; verifying whether a current recording information value included in the recording status information of the corresponding content signifies record; and storing the extracted TSs including content when the current recording information value signifies record.
6. The method of claim 5, wherein the storing of the extracted TSs including the content is terminated when the current recording information value changes from the record to a record end.
7. The method of claim 5, wherein the recording status information includes content reference identification information, content start time, broadcast duration information, and current recording information.
8. The method of claim 5, wherein the recording status information is received with the recording status being stored in a content labeling descriptor included in an MPEG-2-TSDT.
9. A method for generating broadcasting signals, the method comprising: generating recording status information that verifies whether content is currently replayed; generating a TS including the content and a TS including the recording status information; and generating a broadcasting signal including the TS including the content and the
TS including the recording status information.
10. The method of claim 9, wherein the recording status information includes content reference identification information, content start time, broadcast duration information, and current recording information.
11. The method of claim 9, wherein the recording status information is stored in a content labeling descriptor included in a MPEG-2-TSDT.
PCT/KR2008/006574 2007-11-09 2008-11-07 Apparatus and method for storing broadcasting content in dmb system WO2009061150A2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070040276A (en) * 2005-10-11 2007-04-16 엘지전자 주식회사 Digital multi-media broadcasting system, apparatus and method for data process in the brocasting terminal
KR20070073192A (en) * 2006-01-04 2007-07-10 엘지전자 주식회사 Data structure for managing content and method for managing content using the same
KR20080056398A (en) * 2006-12-18 2008-06-23 엘지전자 주식회사 Apparatus and method for recording of digital multimedia broadcasting receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070040276A (en) * 2005-10-11 2007-04-16 엘지전자 주식회사 Digital multi-media broadcasting system, apparatus and method for data process in the brocasting terminal
KR20070073192A (en) * 2006-01-04 2007-07-10 엘지전자 주식회사 Data structure for managing content and method for managing content using the same
KR20080056398A (en) * 2006-12-18 2008-06-23 엘지전자 주식회사 Apparatus and method for recording of digital multimedia broadcasting receiver

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