KR20090048347A - Apparatus and method for storing broadcasting content in dmb system - Google Patents

Abstract

The present invention relates to an apparatus and method for storing content in a DMB system. An apparatus for storing content in a DMB system includes: an RF receiver for receiving and demodulating a broadcast signal; An ensemble demultiplexer for extracting transport streams from the demodulated broadcast signal; A TS demultiplexer for distinguishing and extracting a transport stream for transmitting content from the transport streams and a transport stream for transmitting recording state information; A section processor for analyzing the recording state information; A content storage unit for storing content; And a controller configured to check the start and end of the content requested for the scheduled recording in real time using the analyzed recording state information and to store the requested content in the content storage unit.

Content, storage, metadata, content labeling descriptor, TSDT

Description

Apparatus and method for storing content in DMB system {APPARATUS AND METHOD FOR STORING BROADCASTING CONTENT IN DMB SYSTEM}

The present invention relates to an apparatus and method for storing content in a DMB system, and more particularly, to an apparatus and method for accurately storing corresponding content according to recording state information transmitted by a receiver of a DMB system together with the content in real time from a broadcasting station.

The present invention is derived from a study conducted as part of the IT growth engine technology development project of the Ministry of Knowledge Economy and the Ministry of Information and Communication Research and Development. [Task management number: 2006-S-082-02, Title: Development of customized viewing type DMB technology] .

Terrestrial DMB broadcasting is a multimedia service added to digital audio service based on EUREKA-147 DAB of Europe. Multimedia services are provided by applying MPEG-4 Bit Sliced Arithmetic Coding (BSAC), MPEG-4 AVC for video, and MPEG-4 BIFS (Binary Format for Scenes). Broadcasting stations are preparing schedules for DMB broadcasting channels like DTV (Digital Television), and provide information about electronic content guide (ECG) to users through the Internet or broadcasting channels to increase user convenience. have. In this case, the content electronic guide (ECG) information includes information for identifying the corresponding content, channel information for transmitting the corresponding content, and start time and broadcast length information.

The DMB receiver provides not only mobile viewing function that enables real-time viewing of content without restriction on viewing place, which is a core function of DMB broadcasting, but also provides 'content recording function' that enables content viewing without restriction on viewing time.

When the content recorded by the existing DMB receiver is played back, the content may not be played correctly at the beginning of the content and may be played back before or after the start point, or terminated before or after the end point. This is because the broadcast station cannot transmit the corresponding content correctly according to the organization time of the ECG information known by the broadcast station. This difference between the scheduled time of the known ECG information and the actual broadcast time is that when the broadcast station modifies the scheduled time of the ECG information, the organized time of the ECG information is updated in real time and is not provided to the user, or the broadcast station is relayed in real time. It may be generated when the content is not finished correctly according to the organized time. One way to solve this problem is to provide the DMB receiver in real time with the recording status information, which consists of content identification information for identifying the content currently being transmitted by the broadcasting station and accurate start / end time information at which the content starts and ends. To inform. The DMB receiver does not record the corresponding content according to the broadcasting content programming time, which may be inaccurate, but records the corresponding content based on the recording state information transmitted from the broadcasting station in real time.

The present invention provides an apparatus and method for storing content in a DMB system.

The present invention provides an apparatus and method for accurately storing corresponding content according to recording state information transmitted by a receiver of a DMB system together with the content in real time from a broadcasting station.

The present invention provides an apparatus for storing content at the correct start time and end time at a receiver for receiving content, including content identification information, content start time, broadcast length information, and current recording information in metadata when transmitting content from a broadcasting station of a DMB system. And to a method.

An apparatus for storing broadcast content according to an embodiment of the present invention includes an ensemble demultiplexer for extracting transport streams from a received broadcast signal; A TS demultiplexer for distinguishing and extracting a transport stream for transmitting content from the transport streams and a transport stream for transmitting recording state information; A section processor for analyzing the recording state information; A content storage unit for storing content; And a controller configured to check the start and end of the content requested for the scheduled recording in real time using the analyzed recording state information and to store the requested content in the content storage unit.

According to an embodiment of the present invention, a method of storing broadcast content includes: extracting transport streams from a received broadcast signal; Distinguishing and extracting a transport stream for transmitting content from the transport streams and a transport stream for transmitting recording state information; Analyzing the recording state information; Checking whether a value of current recording information included in the recording state information of the corresponding content is recording; And storing a transport stream for transmitting the extracted content if the value of the current recording information is recording.

A method of generating a broadcast signal in a broadcast apparatus according to an embodiment of the present invention includes the steps of generating recording state information for identifying whether the content is currently played back; Generating a transport stream including the content and a transport stream including the recording state information; And generating a broadcast signal including a transport stream including the content and a transport stream including the recording state information.

The present invention provides an RF receiver for receiving and demodulating a broadcast signal, an ensemble demultiplexer for extracting transport streams from the demodulated broadcast signal, a transport stream for transmitting content from the transport streams, and a transport stream for transmitting recording state information. TS demultiplexing unit to separate and extract, section processing unit to analyze the recording state information, content storage unit to store the content and the start and end of the content requested to be scheduled recording using the analyzed recording state information in real time The present invention relates to an apparatus and a method for storing content in a DMB system including a control unit controlling to store the requested content in the content storage unit. The DMB broadcasting content can be stored according to an accurate broadcast time and an end time.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention; If it is determined that the gist of the present invention may be unnecessarily obscured, detailed description thereof will be omitted.

The embodiment of the present invention includes content identification information, content start time, broadcast length information, and current recording information in metadata when a broadcast station of a DMB system transmits the content at the correct start time and end time. A storage device and a method thereof are provided.

1 is a diagram illustrating a structure of an apparatus for storing content in a DMB system according to an embodiment of the present invention. Referring to FIG. 1, an apparatus for storing content includes a control unit 100, a radio frequency (RF) receiver 102, an ensemble demultiplexer 104, and a transport stream demultiplexer 106. ), Section processing unit 108 and content storage unit 110.

The RF receiver 102 receives and demodulates a digital multimedia broadcasting (DMB) broadcast signal of a channel band under control, and transmits the demodulated broadcast signal to the ensemble demultiplexer 104.

The ensemble demultiplexer 104 extracts MPEG-2 transport streams from the demodulated broadcast signal and transmits it to the TS demultiplexer 106.

The TS demultiplexer 106 transmits an MPEG-2 transport stream through which content is transmitted in an MPEG-2 transport stream and an MPEG-transport through which content recording state information (content identification information, content start time, broadcast length information, and current recording information) is transmitted. 2 Separate and extract transport streams.

In addition, the TS demultiplexer 106 provides the MPEG-2 transport stream through which the recording state information is transmitted to the section processor 108, and the MPEG-2 transport stream (that is, the content is transmitted) under the control of the controller 100. ) Is stored in the content storage unit 110.

The section processor 108 analyzes the MPEG-2 transport stream through which the recording status information is transmitted, checks the content identification information, the content start time, the broadcast length information, and the current recording information included in the recording status information, and provides the same to the controller 100. do.

The content storage unit 110 stores the content provided from the TS demultiplexer 106 under the control of the controller 100.

The control unit 100 receives the content reservation recording request from the user, and if the current time is the expected start time of the broadcast of the corresponding content requested for the reservation recording from the user, the channel controlling the RF receiving unit 102 to receive the corresponding content for the scheduled recording is received. To change the receive channel band. Thereafter, when the controller 100 receives the status information of the corresponding content from the section processing unit 108, the controller 100 checks the current recording information included in the recording status information and stores the corresponding content during the section in which the current recording information has a recording value. Store it at (110).

The recording state information of the content includes the content identification information, the corresponding content start time, the broadcast length information, and the current recording information, and is described in the MPEG-2 descriptor described in FIG. 2 and defined in the MPEG-2 system. Description Table) is transmitted to the device that stores the content.

FIG. 2 is a diagram illustrating a content labeling descriptor structure describing content identification information and start time and broadcast length information of a broadcast content according to an embodiment of the present invention.

FIG. 2 is a descriptor in which a content labeling descriptor defined in the ISO / IEC MPEG-2 system Amendment 1 is extended and defined to include content start time and broadcast length information. The main fields of the content labeling descriptor are described in Table 1 below.

3 illustrates an MPEG-2 Transport Stream Description Table (TSDT) structure in which a content labeling descriptor is transmitted according to an embodiment of the present invention.

TSDT defined in MPEG-2 system standard has table_id of 0x03 and PID of 0x0002. Descriptions of the main fields of the TSDT are shown in Table 2 below.

Hereinafter, a method of storing content in the DMB system according to the present invention configured as described above will be described with reference to the accompanying drawings.

4 is a flowchart illustrating a process of storing content for an accurate time in an apparatus for storing content according to an embodiment of the present invention.

Referring to FIG. 4, when the content storage recording request is received in step 400, the apparatus for storing content proceeds to step 402 to determine whether the current time is the expected start time of the corresponding content. If the result of the check is the expected start time of the corresponding content, the process proceeds to step 404 to change the channel band in which the corresponding content to be reserved and received is received.

In operation 406, the apparatus for storing content receives and demodulates a broadcast signal. In step 408, the apparatus for storing content extracts MPEG-2 transport streams from the demodulated broadcast signal by ensemble demultiplexing. In the -2 transport streams, the MPEG-2 transport streams having content transmitted therefrom and the MPEG-2 transport streams having recorded state information are distinguished and extracted.

In operation 412, the device storing the content determines whether the value of the current recording information included in the recording state information is recording. If the result of the check in step 412 is that the value of the current recording information is the end of the recording proceeds to step 416. The description of step 416 will be described later after step 414.

If the value of the current recording information is recorded in step 412, the process proceeds to step 414 to store the MPEG-2 transport stream (i.e., corresponding content) to which the extracted content is transmitted, and proceeds to step 416 to record the value of the current recording information. Check whether the recording end has been changed. As a result of checking in step 416, if the recording end of the current recording information is changed from recording, the reserved recording algorithm is terminated.

However, as a result of checking in step 416, if the value of the current recording information is not changed when the recording end is changed in the recording, that is, if the value of the current recording information is the recording or the end of recording from the previous recording end, the process returns to step 406 to step 416. As a result of checking in step 416, a series of processes are repeated until the value of the current recording information changes from recording to recording termination.

The method of storing content in a DMB system may be implemented in the form of program instructions that may be executed by various computer means, and may be recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

1 is a diagram illustrating a structure of an apparatus for storing content in a DMB system according to an embodiment of the present invention;

2 is a diagram illustrating a content labeling descriptor structure describing content identification information and start time and broadcast length information of a corresponding broadcast content according to an embodiment of the present invention;

3 is a diagram illustrating an MPEG-2 Transport Stream Description Table (TSDT) structure in which a content labeling descriptor is transmitted according to an embodiment of the present invention;

4 is a flowchart illustrating a process of storing content for an accurate time in an apparatus for storing content according to an embodiment of the present invention.

Claims (11)

An ensemble demultiplexer for extracting transport streams from the received broadcast signal; A TS demultiplexer for dividing and extracting a transport stream including content from the transport streams and a transport stream including recording state information; A section processor for analyzing the recording state information; A content storage unit for storing content; And And a control unit for controlling the start and end of the content requested for the scheduled recording in real time using the analyzed recording state information, and controlling to store the requested content in the content storage unit. Device. The method of claim 1, wherein the recording state information, Apparatus for storing broadcast content, comprising content identification information, content start time, broadcast length information, and current recording information. The method of claim 2, wherein the control unit, And storing the received content when the current recording information value of the requested content is recording. The method of claim 1, wherein the recording state information, Apparatus for storing broadcast content characterized in that it is described in the content labeling descriptor (content labeling descriptor) included in the MPEG-2 Transport Stream Description Table (TSDT). Extracting transport streams from the received broadcast signal; Dividing and extracting a transport stream including content from the transport streams and a transport stream including recording state information; Analyzing the recording state information; Checking whether a value of current recording information included in the recording state information of the corresponding content is recording; And And storing a transport stream for transmitting the extracted content if the value of the current recording information is a recording. 6. The method of claim 5, further comprising terminating the storage of the transport stream for transmitting the content when the value of the current recording information is changed from recording to recording termination. The method of claim 5, wherein the recording state information, A method for storing broadcast content, comprising content identification information, content start time, broadcast length information, and current recording information. The method of claim 5, wherein the recording state information, A method for storing broadcast content, characterized in that it is described in a content labeling descriptor included in an MPEG-2 Transport Stream Description Table (TSDT). Generating recording state information for identifying whether the content is currently played back with respect to the content; Generating a transport stream including the content and a transport stream including the recording state information; And And generating a broadcast signal including a transport stream including the content and a transport stream including the recording state information. 10. The method of claim 9, wherein the recording state information, And a content identification information, content start time, broadcast length information, and current recording information. 10. The method of claim 9, wherein the recording state information, A method for generating a broadcast signal in a broadcast apparatus, characterized by being described in a content labeling descriptor included in an MPEG-2 Transport Stream Description Table (TSDT).

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