EP1886489A1 - Method and apparatus for setting rtc time of digital broadcast receiver using time information contained in transport stream - Google Patents

Method and apparatus for setting rtc time of digital broadcast receiver using time information contained in transport stream

Info

Publication number
EP1886489A1
EP1886489A1 EP06768666A EP06768666A EP1886489A1 EP 1886489 A1 EP1886489 A1 EP 1886489A1 EP 06768666 A EP06768666 A EP 06768666A EP 06768666 A EP06768666 A EP 06768666A EP 1886489 A1 EP1886489 A1 EP 1886489A1
Authority
EP
European Patent Office
Prior art keywords
time
time information
broadcast receiver
digital broadcast
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06768666A
Other languages
German (de)
French (fr)
Inventor
Jung-Min Kang
Soo-Kang Bae
Jin-Yong Ahn
Du-il 108-1403 Dongsuwon LG Village KIM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020050052546A external-priority patent/KR100772375B1/en
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1886489A1 publication Critical patent/EP1886489A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • 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
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • 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
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • 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
    • H04N21/47214—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 for content reservation or setting reminders; for requesting event notification, e.g. of sport results or stock market

Definitions

  • the present invention relates to a digital broadcast receiver, and more particularly, to a method and apparatus for setting the time of a real-time clock (RTC) included in a digital broadcast receiver.
  • RTC real-time clock
  • Digital broadcasting technology which provides high-definition TV (HDTV) services or digital multimedia broadcast (DMB) services, has many advantages over existing analog television (TV) broadcasting technology in that it improves audio/ video (AV) quality and allows mobility. Therefore, a lot of research has been conducted into the development and commercial use of digital broadcasting.
  • a real-time clock RTC is included as a clock in fixed or mobile devices capable of receiving digital broadcasting, and therefore, time-dependent operations are performed in a digital broadcast receiver, based on the time of the RTC.
  • the present invention provides a method and apparatus for setting the time of a real-time clock (RTC) of a digital broadcast receiver using time information contained in a transport frame for digital broadcasting.
  • RTC real-time clock
  • a digital broadcast receiver sets the time of a
  • the digital broadcast receiver may periodically receive a TS containing time information to correct the time of the RTC based on the time information, thereby maintaining a minimum difference between the time of the RTC and the time information received from the transmitter.
  • FIG. 1 is a schematic block diagram for illustrating a process of transmitting and receiving a digital broadcast
  • FIG. 2 is a flowchart illustrating a method of setting the time of a real-time clock
  • RTC in a digital broadcast receiver
  • FIG. 3 is a flowchart illustrating a method of setting the time of a real-time clock
  • RTC before a scheduled application program operates, according to a non-limiting embodiment of the present invention.
  • FIG. 4 is a block diagram of a digital broadcast receiver according to a non-limiting embodiment of the present invention.
  • a method of setting time in a digital broadcast receiver comprising receiving broadcast data containing time information; extracting the time information from the broadcast data; and setting a real-time clock time of the digital broadcast receiver based on the extracted time information.
  • a broadcast transmitter may be requested to provide the broadcast data containing the time information when the real-time clock time is not set for a predetermined amount of time.
  • a computer readable medium storing a program for executing a method of correcting the time of an RTC of a digital broadcast receiver based on time information contained in a transport frame.
  • a digital broadcast receiver which comprises a real-time clock, the receiver comprising an information extractor extracting time information from received broadcast data; and a time setter setting a time of the real-time clock based on the extracted time information.
  • FIG. 1 is a schematic block diagram for illustrating a process of transmitting and receiving a digital broadcast.
  • video information 110, audio information 120, and other information 130 that specifies channel numbers, reproduction time, etc. are multiplexed into a packet, which is a transport stream (TS), by a multiplexer 140, and the packet is transmitted to a digital broadcast receiver via a channel.
  • TS transport stream
  • the TS is obtained by multiplexing several packets, which are comprised of a video bit stream and an audio bit stream, into a bit stream.
  • the TS it is possible to multiplex a plurality of programs into a bit stream.
  • the digital broadcast receiver receives the TS, extracts video information 160, audio information 170, and other information 180 from the TS by a demultiplexer 150, decodes them, and provides a user with the decoded result.
  • the other information 130 may include various types of information according to the digital broadcast standard.
  • information regarding time when a broadcast is transmitted must be included in the other information 130 so that the information regarding the time is extracted from the TS to set the time of a real-time clock (RTC).
  • RTC real-time clock
  • FIG. 2 is a flowchart illustrating a method of setting the time of an RTC in a digital broadcast receiver, according to a non-limiting embodiment of the present invention.
  • the digital broadcast receiver receives a TS from an apparatus that transmits a digital broadcast (hereinafter referred to as a 'transmitter') via a wireless channel (210), and determines whether the received TS contains time information (220). Time information may not be contained in the TS according to the digital broadcast standard. If time information is not contained in the TS, a received broadcast is reproduced (250).
  • the digital broadcast receiver is capable of synchronizing the time of the RTC included therein with a reference time based on the time information contained in the TS transmitted by the transmitter.
  • the digital broadcast receiver sets the time of the RTC based on the time information contained in the TS transmitted by the transmitter especially when the digital broadcast receiver needs to execute an application program for scheduled recording at a specific instant of time. This case will now be described in greater detail.
  • FIG. 3 is a flowchart illustrating a method of setting the time of a real-time clock
  • RTC time-recording before an application program, which is scheduled to operate at a specific instant of time, operates, according to a non-limiting embodiment of the present invention.
  • a scheduled-recording program will be instanced.
  • a user sets a scheduled recording by selecting a specific time and a specific channel, using a scheduled-recording program stored in a digital broadcast receiver (310). Then, when recognizing that the specific time is approaching after a predetermined amount of time (320), the digital broadcast receiver requests a transmitter to provide time information (330). Since the digital broadcast receiver determines whether it is the specific time based on the time of the RTC, the digital broadcast receiver requests the time information to set the time of the RTC before the specific time set in the RTC, considering the difference between the time of the RTC and the time information transmitted from the transmitter. Then, as per the request, the transmitter transmits a TS containing the time information to the digital broadcast receiver (340).
  • the TS is needed to correct the time of the RTC, and thus may not contain video or audio broadcast data.
  • the digital broadcast receiver extracts the time information from the TS and corrects the time of the RTC based on the extracted time information (350).
  • the time of the RTC need not be amended.
  • the digital broadcast receiver executes the scheduled- recording program at the specific time with reference to the time of the RTC synchronized with the reference time, receives a TS of a desired broadcast, and records the broadcast.
  • the digital broadcast receiver requests the transmitter to provide time information a predetermined amount of time before the specific time, and updates the time of the RTC based on the provided time information.
  • the digital broadcast receiver may be set to detect a channel which carries the TS containing the time information from among the TSs at a predetermined instant of time without requesting the transmitter to provide the time information.
  • the digital broadcast receiver may periodically receive a TS containing time information to correct the time of the RTC, thereby maintaining a minimum difference between the time of the RTC and a reference time based on the time information.
  • the transmitter periodically transmits a TS containing time information.
  • FIG. 4 is a block diagram of a digital broadcast receiver 400 according to a non- limiting embodiment of the present invention.
  • the digital broadcast receiver 400 includes a transceiver 410, an information extractor 420, a time setter 430, a RTC 440, a controller 450, a storage unit 460, an MPEG decoder 470, and a time- information requesting unit 480.
  • additional constituent elements are further included therein, but are not included in the block diagram of FIG. 4 in order to clarify the claimed gist of the present invention.
  • the transceiver 410 transmits or receives a digital broadcast signal, i.e., a TS, and the information extractor 420 extracts time information and broadcast data from the TS received from the transceiver 410.
  • the MPEG decoder 470 decodes audio/video data extracted by the information extractor 420 and transmits the decoding result to a user via an output unit (not shown).
  • the time setter 430 corrects the time of the RTC 440 based on the time information extracted by the information extractor 420.
  • the time- information requesting unit 480 requests a transmitter (not shown) to provide a TS containing time information via the transceiver 410, when the time of the RTC 440 has not been corrected for a predetermined amount of time or when the time of the RTC 440 needs to be corrected.
  • the storage unit 460 stores various application programs. In the case of a time-dependent application program, such as a scheduled-recording program, which is operated by the controller 450 based on the RTC 440, the controller 450 checks the time of the RTC 440, and controls the time-information requesting unit 480 to request the transmitter to provide time information for correcting the time of the RTC 440 a predetermined amount of time before a specific time set by the user. Also, the controller 450 can detect a channel which carries broadcast data containing the time information and tunes to the channel to receive or request the time information.
  • the above non-limiting embodiments of the present invention may be embodied as computer readable programs, and performed in a general digital computer that can execute the programs, using a computer readable medium.
  • the computer readable medium may be any recording apparatus capable of storing data that is read by a computer system, e.g., a magnetic recording medium (a ROM, a RAM, a floppy disk, a hard disc, etc.), an optical recording medium (a CD-ROM, a DVD, etc.), and a carrier wave that transmits data via the Internet, for example.
  • a magnetic recording medium e.g., a ROM, a RAM, a floppy disk, a hard disc, etc.
  • an optical recording medium a CD-ROM, a DVD, etc.
  • carrier wave that transmits data via the Internet

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Finance (AREA)
  • Strategic Management (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

Provided are a method and apparatus for setting the time of a real-time clock included in a digital broadcast receiver. Since the digital broadcast receiver sets the time of the real-time clock included therein, based on time information contained in a received transport stream, it is possible to synchronize the time of the real-time clock with a reference time based on the time information contained in broadcast data transmitted by a broadcast transmitter. Accordingly, it is possible to minimize time-related errors during the execution of a time-dependent application program such as a scheduled-recording program.

Description

Description
METHOD AND APPARATUS FOR SETTING RTC TIME OF DIGITAL BROADCAST RECEIVER USING TIME INFORMATION CONTAINED IN TRANSPORT STREAM
Technical Field
[1] The present invention relates to a digital broadcast receiver, and more particularly, to a method and apparatus for setting the time of a real-time clock (RTC) included in a digital broadcast receiver.
Background Art
[2] Digital broadcasting technology, which provides high-definition TV (HDTV) services or digital multimedia broadcast (DMB) services, has many advantages over existing analog television (TV) broadcasting technology in that it improves audio/ video (AV) quality and allows mobility. Therefore, a lot of research has been conducted into the development and commercial use of digital broadcasting. In general, a real-time clock (RTC) is included as a clock in fixed or mobile devices capable of receiving digital broadcasting, and therefore, time-dependent operations are performed in a digital broadcast receiver, based on the time of the RTC.
[3] However, if the time of the RTC is incorrect, errors may occur during the execution of time-dependent operations. For instance, if a user sets a specific broadcast to be recorded at a specific instant of time, the user cannot record the broadcast at the specific instant of time if the broadcast is transmitted from a broadcasting station at a different time from the time of the RTC. Disclosure of Invention
Technical Solution
[4] The present invention provides a method and apparatus for setting the time of a real-time clock (RTC) of a digital broadcast receiver using time information contained in a transport frame for digital broadcasting.
Advantageous Effects
[5] According to the present invention, a digital broadcast receiver sets the time of a
RTC included therein, based on time information contained in a received TS. Accordingly, it is possible to synchronize the time of the RTC in the digital broadcast receiver with a reference time based on the time information contained in broadcast data transmitted by a broadcast transmitter, and minimize time-related errors during the execution of a time-dependent application program such as a scheduled-recording program,. Also, the digital broadcast receiver may periodically receive a TS containing time information to correct the time of the RTC based on the time information, thereby maintaining a minimum difference between the time of the RTC and the time information received from the transmitter.
Description of Drawings
[6] FIG. 1 is a schematic block diagram for illustrating a process of transmitting and receiving a digital broadcast;
[7] FIG. 2 is a flowchart illustrating a method of setting the time of a real-time clock
(RTC) in a digital broadcast receiver, according to a non-limiting embodiment of the present invention;
[8] FIG. 3 is a flowchart illustrating a method of setting the time of a real-time clock
(RTC) before a scheduled application program operates, according to a non-limiting embodiment of the present invention; and
[9] FIG. 4 is a block diagram of a digital broadcast receiver according to a non-limiting embodiment of the present invention.
Best Mode
[10] According to an aspect of the present invention, there is provided a method of setting time in a digital broadcast receiver, the method comprising receiving broadcast data containing time information; extracting the time information from the broadcast data; and setting a real-time clock time of the digital broadcast receiver based on the extracted time information.
[11] A broadcast transmitter may be requested to provide the broadcast data containing the time information when the real-time clock time is not set for a predetermined amount of time.
[12] According to another aspect of the present invention, there is provided a computer readable medium storing a program for executing a method of correcting the time of an RTC of a digital broadcast receiver based on time information contained in a transport frame.
[13] According to another aspect of the present invention, there is provided a digital broadcast receiver which comprises a real-time clock, the receiver comprising an information extractor extracting time information from received broadcast data; and a time setter setting a time of the real-time clock based on the extracted time information.
Mode for Invention
[14] FIG. 1 is a schematic block diagram for illustrating a process of transmitting and receiving a digital broadcast. In general, referring to FIG. 1, in digital broadcasting, video information 110, audio information 120, and other information 130 that specifies channel numbers, reproduction time, etc., are multiplexed into a packet, which is a transport stream (TS), by a multiplexer 140, and the packet is transmitted to a digital broadcast receiver via a channel. Here, the TS is obtained by multiplexing several packets, which are comprised of a video bit stream and an audio bit stream, into a bit stream. With use of the TS, it is possible to multiplex a plurality of programs into a bit stream. The digital broadcast receiver receives the TS, extracts video information 160, audio information 170, and other information 180 from the TS by a demultiplexer 150, decodes them, and provides a user with the decoded result. As described above, the other information 130 may include various types of information according to the digital broadcast standard. In particular, according to an embodiment of the present invention, information regarding time when a broadcast is transmitted must be included in the other information 130 so that the information regarding the time is extracted from the TS to set the time of a real-time clock (RTC).
[15] FIG. 2 is a flowchart illustrating a method of setting the time of an RTC in a digital broadcast receiver, according to a non-limiting embodiment of the present invention. First, the digital broadcast receiver receives a TS from an apparatus that transmits a digital broadcast (hereinafter referred to as a 'transmitter') via a wireless channel (210), and determines whether the received TS contains time information (220). Time information may not be contained in the TS according to the digital broadcast standard. If time information is not contained in the TS, a received broadcast is reproduced (250). If time information is contained in the TS, the time information is extracted from the TS (230), the time of the RTC is corrected based on the extracted time information (240), and the received broadcast is reproduced (250). Accordingly, in the above non-limiting embodiment of the present invention, the digital broadcast receiver is capable of synchronizing the time of the RTC included therein with a reference time based on the time information contained in the TS transmitted by the transmitter.
[16] It is crucial that the digital broadcast receiver sets the time of the RTC based on the time information contained in the TS transmitted by the transmitter especially when the digital broadcast receiver needs to execute an application program for scheduled recording at a specific instant of time. This case will now be described in greater detail.
[17] FIG. 3 is a flowchart illustrating a method of setting the time of a real-time clock
(RTC) before an application program, which is scheduled to operate at a specific instant of time, operates, according to a non-limiting embodiment of the present invention. In the present embodiment, a scheduled-recording program will be instanced.
[18] First, a user sets a scheduled recording by selecting a specific time and a specific channel, using a scheduled-recording program stored in a digital broadcast receiver (310). Then, when recognizing that the specific time is approaching after a predetermined amount of time (320), the digital broadcast receiver requests a transmitter to provide time information (330). Since the digital broadcast receiver determines whether it is the specific time based on the time of the RTC, the digital broadcast receiver requests the time information to set the time of the RTC before the specific time set in the RTC, considering the difference between the time of the RTC and the time information transmitted from the transmitter. Then, as per the request, the transmitter transmits a TS containing the time information to the digital broadcast receiver (340). Here, the TS is needed to correct the time of the RTC, and thus may not contain video or audio broadcast data. When receiving the TS containing the time information from the transmitter, the digital broadcast receiver extracts the time information from the TS and corrects the time of the RTC based on the extracted time information (350). Of course, when there is no difference between the time of the RTC and a reference time based on the time information, the time of the RTC need not be amended. Also, in operation 350, the digital broadcast receiver executes the scheduled- recording program at the specific time with reference to the time of the RTC synchronized with the reference time, receives a TS of a desired broadcast, and records the broadcast.
[19] In the present embodiment, the digital broadcast receiver requests the transmitter to provide time information a predetermined amount of time before the specific time, and updates the time of the RTC based on the provided time information. However, in general, since various TSs, including a TS containing time information, are transmitted via many channels, the digital broadcast receiver may be set to detect a channel which carries the TS containing the time information from among the TSs at a predetermined instant of time without requesting the transmitter to provide the time information.
[20] Also, without respect to a time-dependent application program in the present embodiment, the digital broadcast receiver may periodically receive a TS containing time information to correct the time of the RTC, thereby maintaining a minimum difference between the time of the RTC and a reference time based on the time information. However, this is possible when the transmitter periodically transmits a TS containing time information.
[21] FIG. 4 is a block diagram of a digital broadcast receiver 400 according to a non- limiting embodiment of the present invention. Referring to FIG. 4, the digital broadcast receiver 400 includes a transceiver 410, an information extractor 420, a time setter 430, a RTC 440, a controller 450, a storage unit 460, an MPEG decoder 470, and a time- information requesting unit 480. For the complete operation of the digital broadcast receiver 400, additional constituent elements are further included therein, but are not included in the block diagram of FIG. 4 in order to clarify the claimed gist of the present invention.
[22] The transceiver 410 transmits or receives a digital broadcast signal, i.e., a TS, and the information extractor 420 extracts time information and broadcast data from the TS received from the transceiver 410. The MPEG decoder 470 decodes audio/video data extracted by the information extractor 420 and transmits the decoding result to a user via an output unit (not shown). The time setter 430 corrects the time of the RTC 440 based on the time information extracted by the information extractor 420. The time- information requesting unit 480 requests a transmitter (not shown) to provide a TS containing time information via the transceiver 410, when the time of the RTC 440 has not been corrected for a predetermined amount of time or when the time of the RTC 440 needs to be corrected. The storage unit 460 stores various application programs. In the case of a time-dependent application program, such as a scheduled-recording program, which is operated by the controller 450 based on the RTC 440, the controller 450 checks the time of the RTC 440, and controls the time-information requesting unit 480 to request the transmitter to provide time information for correcting the time of the RTC 440 a predetermined amount of time before a specific time set by the user. Also, the controller 450 can detect a channel which carries broadcast data containing the time information and tunes to the channel to receive or request the time information.
[23] The above non-limiting embodiments of the present invention may be embodied as computer readable programs, and performed in a general digital computer that can execute the programs, using a computer readable medium.
[24] The computer readable medium may be any recording apparatus capable of storing data that is read by a computer system, e.g., a magnetic recording medium (a ROM, a RAM, a floppy disk, a hard disc, etc.), an optical recording medium (a CD-ROM, a DVD, etc.), and a carrier wave that transmits data via the Internet, for example.

Claims

Claims
[1] L A method of setting time in a digital broadcast receiver, comprising: requesting a time information to a broadcast system; receiving broadcast data containing time information; extracting the time information from the broadcast data; and setting a time of the digital broadcast receiver based on the extracted time information.
[2] 2. The method of claim 1, wherein the digital broadcast receiver requests the time information periodically.
[3] 3. The method of claim 1, wherein the digital broadcast receiver request the time information when the time of the digital broadcast receiver is not set for a predetermined amount of time.
[4] 4. The method of claim 1, further comprising operating an application program based on the time information.
[5] 5. The method of claim 4, wherein the requesting of the broadcast data is made a predetermined amount of time before a specific instant of time when a predetermined application program is scheduled to operate in the digital broadcast receiver.
[6] 6. A method of setting time in a digital broadcast receiver, comprising: detecting a channel which carries broadcast data containing a time information; receiving broadcast data containing a time information from the detected channel; extracting the time information from the broadcast data; and setting a time of the digital broadcast receiver based on the extracted time information.
[7] 7. The method of claim 6, further comprising requesting a time information to the broadcast transmitter.
[8] 8. The method of claim 6, further comprising operating a predetermined application program on the time information.
[9] 9. The method of claim 8, wherein the requesting of the broadcast data is made a predetermined amount of time before a specific instant of time when a predeterm ined application program is scheduled to operate in the digital broadcast receiver.
[10] 10. A computer readable medium having embodied thereon a program for causing a computer to execute a method of setting time of a broadcast receiver, the method comprising: requesting a time information to a broadcast system; receiving broadcast data containing time information; extracting the time information from the broadcast data; and setting a time of the digital broadcast receiver based on the extracted time information. [11] 11. A computer readable medium having embodied thereon a program for causing a computer to execute the method of setting time of a digital broadcast receiver, the method comprising: detecting a channel which carries broadcast data containing a time information; receiving broadcast data containing a time information from the detected channel; extracting the time information from the broadcast data; and setting a time of the broadcast receiver based on the extracted time information. [12] 12. A digital broadcast receiver, comprising: a time information requesting unit which sends a request message which request a time information; a transceiver which receives a broadcast data containing a time information; a real-time clock; an information extractor operative to extract time information from received broadcast data; and a time setter operative to set a time of the real-time clock based on the extracted time information. [13] 13. The digital broadcast receiver of claim 12, wherein the time information requesting unit sends the request message periodically. [14] 14. The digital broadcast receiver of claim 12, wherein the time information requesting unit sends the request message when the time of the digital broadcast receiver is not set for a predetermined amount of time. [15] 15. The digital broadcast receiver of claim 14, further comprising a controller which operate an application program based on the time information. [16] 16. The digital broadcast receiver of claim 15, wherein the time information requesting unit sends the request message a predetermined amount of time before a specific time when a predetermined application program is scheduled to operate. [17] 17. A digital broadcast receiver, comprising: a controller which detects a channel which carries broadcast data containing a time information and tunes to the channel; a transceiver which receives a broadcast data containing a time information via the detected channel; a real-time clock; an information extractor operative to extract time information from received broadcast data; and a time setter operative to set a time of the real-time clock based on the extracted time information. [18] 18. The digital broadcast receiver of claim 17, further conprising: time information requesting unit which requests a time information to the broadcast transmitter. [19] 19. The digital broadcast receiver of claim 17, wherein the controller operates a predetermined application program based on the time information. [20] 20. The digital broadcast receiver of claim 19, wherein the requesting of the broadcast data is made a predetermined amount of time before a specific instant of time when a predetermined application program is scheduled to operate in the digital broadcast receiver.
EP06768666A 2005-05-31 2006-05-29 Method and apparatus for setting rtc time of digital broadcast receiver using time information contained in transport stream Withdrawn EP1886489A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US68541205P 2005-05-31 2005-05-31
KR1020050052546A KR100772375B1 (en) 2005-05-31 2005-06-17 Method for setting time of the clock in the digital broadcast receiver using information included in the transport stream and digital broadcast receiver device therefor
PCT/KR2006/002035 WO2006129937A1 (en) 2005-05-31 2006-05-29 Method and apparatus for setting rtc time of digital broadcast receiver using time information contained in transport stream

Publications (1)

Publication Number Publication Date
EP1886489A1 true EP1886489A1 (en) 2008-02-13

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