KR101107594B1 - Apparatus and method for recording digital multimedia broadcasting including metadata - Google Patents

Abstract

The present invention relates to a digital multimedia broadcasting recording apparatus and method for generating and recording DMB (Digital Multimedia Broadcasting) data (broadcast stream) as a DMB AF (Application Format) file including metadata. After converting the segment information of the metadata, the digital multimedia broadcasting recording is provided to generate and record the DMB AF file together with the DMB data (broadcast stream) so as to provide segment information corresponding to AV even when the recorded DMB AF file is played back. An apparatus and a method thereof are provided.

To this end, the present invention provides a broadcast recording apparatus, comprising: broadcast stream receiving means for receiving a broadcast stream; Broadcast stream processing means for processing the received broadcast stream; Metadata receiving means for receiving metadata; Metadata processing means for processing the received metadata; Metadata conversion means for converting the processed metadata according to a recording time; DMB AF generating means for generating the processed broadcast stream and the converted metadata into a Digital Multimedia Broadcasting Application Format (DMB AF) file; And storage means for storing the generated DMB AF file.

DMB AF, Metadata, Convert, Include, Record Time, Segment Information, Segment Time Information

Description

Digital multimedia broadcasting recording apparatus and method thereof including metadata {APPARATUS AND METHOD FOR RECORDING DIGITAL MULTIMEDIA BROADCASTING INCLUDING METADATA}

The present invention relates to a digital multimedia broadcasting recording apparatus and method for generating and recording digital multimedia broadcasting (DMB) data (broadcast stream) as a digital multimedia broadcasting application format (DMB AF) file including metadata. Specifically, the present invention relates to a digital multimedia broadcasting recording apparatus and method for generating and recording a DMB AF file together with DMB data (broadcast stream) after converting segment information of metadata according to a recording time.

The present invention is derived from the research conducted as part of the IT growth engine technology development of the Ministry of Knowledge Economy [Task Management Number: 2006-S-082-03, Task name: Development of customized viewing type DMB technology].

Today, due to technological advances in the IT field, an environment that can consume various multimedia contents anytime and anywhere is provided. In particular, since 2005, satellite DMB and terrestrial DMB began, and the mobile broadcasting era was opened. Accordingly, users can receive broadcasting service regardless of the place.

In the DMB system, various types of data as well as an AV (Audio-Video) stream can be delivered. Various types of data include binary format for scenes (BIFS) data, image data, and broadcast web service (BWS). : Broadcast Website Service) data. The need for standards to store DMB data (broadcast streams), including these different types of data, has been raised, and the Moving Picture Experts Group, consisting of experts from the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) Standardization was completed in August 2008, and the ISO / IEC 23000-9 DMB Digital Multimedia Broadcasting Application Format (AF) standard was completed in August 2008. The completed DMB AF standard defines the file format to support various contents of DMB including metadata.

In order to express additional information on DMB content, the Telecommunications Technology Association (TTA) has adopted the Extensible Markup Language (XML) standard for terrestrial digital multimedia broadcasting (DMB) electronic content guidance (ECG). Enacted. The DMB ECG XML standard defines XML syntax and semantics for providing detailed information and additional information about DMB content delivered to broadcasting networks and communication networks.

Accordingly, the DMB viewing terminal may receive DMB ECG metadata and display additional information and detailed information to the user by using the received DMB ECG metadata. In addition, the user may obtain information about the content by using the displayed additional information and the detailed information, and select and watch the desired content.

On the other hand, when recording a DMB program on a DMB viewing terminal, the AV stream includes recording of segment information of the DMB ECG metadata described for the entire DMB program, unless the entire DMB program is completely recorded from the beginning to the end. There is a problem that does not match.

That is, in the conventional technology as described above, there is a problem that segment information of DMB ECG metadata described for the entire DMB program is inconsistent with the recorded AV stream unless the entire DMB program is recorded. It is a subject of the present invention.

Therefore, the present invention converts the segment information of the metadata according to the recording time, and then generates and records the DMB AF file together with the DMB data (broadcast stream), thereby reproducing segment information corresponding to AV even when the recorded DMB AF file is played back. An object of the present invention is to provide a digital multimedia broadcasting recording apparatus and a method thereof.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned above can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object is a broadcast recording apparatus, comprising: broadcast stream receiving means for receiving a broadcast stream; Broadcast stream processing means for processing the received broadcast stream; Metadata receiving means for receiving metadata; Metadata processing means for processing the received metadata; Metadata conversion means for converting the processed metadata according to a recording time; DMB AF generating means for generating the processed broadcast stream and the converted metadata into a Digital Multimedia Broadcasting Application Format (DMB AF) file; And storage means for storing the generated DMB AF file.

On the other hand, the method of the present invention for achieving the above object, in the broadcast recording method, receiving and processing metadata; Receiving and processing a broadcast stream; A metadata conversion step of converting the processed metadata according to a recording time; A DMB AF generating step of generating the processed broadcast stream and the converted metadata into a Digital Multimedia Broadcasting Application Format (DMB AF) file; And storing the generated DMB AF file.

As described above, the present invention converts the time information of the segment using the recording start time and the recording end time, and then generates and stores (records) the DMB AF file together with the DMB data (broadcast stream), thereby recording the segment of the recorded DMB AF file. By ensuring that the information conforms to the AV stream, this segment information conforms to the AV stream, providing segment details that match the content of the AV stream being played back when the recorded DMB AF file is played back, and providing segment details when browsing segment-based content. You can move to an AV stream location that matches the information.

According to the present invention as described above, after converting the segment information of the metadata according to the recording time, by generating and recording as a DMB AF file together with the DMB data (broadcast stream), even when playing the recorded DMB AF file, There is an effect that can provide segment information.

That is, the present invention converts the segment information of the metadata according to the recording time, generates and stores the DMB AF file together with the DMB data (broadcast stream), so that it may occur when the segment information of the metadata is stored without being converted. There is an effect that can prevent the error of the segment information.

The above objects, features, and advantages will be more clearly understood from the following detailed description with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains may have the technical idea of the present invention. It will be easy to implement. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an embodiment of a digital multimedia broadcasting recording apparatus including metadata according to the present invention.

As shown in FIG. 1, a digital multimedia broadcasting recording apparatus including metadata according to the present invention includes a broadcast stream receiver 101 for receiving a broadcast stream and a broadcast stream received through the broadcast stream receiver 101. Broadcast stream processing unit 102 for processing the metadata, metadata receiving unit 103 for receiving the metadata, metadata processing unit 104 for processing the metadata received through the metadata receiving unit 103, the meta A metadata converter 105 for converting the metadata processed by the data processor 104 according to a recording time, a broadcast stream (AV stream) processed by the broadcast stream processor 102 and the metadata converter 105. Storing the DMB AF file generated by the DMB AF generating unit 106 and the DMB AF generating unit 106 for generating the converted metadata as a DMB AF file. It includes a storage unit (107).

Next, the components will be described in more detail.

First, the broadcast stream receiving unit 101 receives conventional commercially available terrestrial DMB and satellite DMB streams (broadcast streams).

The broadcast stream processing unit 102 demultiplexes and decodes the broadcast stream received by the broadcast stream receiving unit 101 to reproduce the AV stream. In this case, the processing process for reproduction may include an MPEG-2 Transport Stream (TS) demultiplexing process, an audio decoding process, a video decoding process, and the like.

Here, the AV stream may be, for example, an MPEG-2 transport stream. The AV stream may include audio data or both audio data and video data.

The metadata receiver 103 receives DMB ECG metadata from the outside. In this case, the DMB ECG metadata may be received through a communication network or may be received through a broadcasting network.

The metadata processor 104 analyzes the metadata received through the metadata receiver 103 and outputs additional information to the user. That is, the metadata processing unit 104 parses the DMB ECG metadata received through the metadata receiving unit 103 and outputs the result (additional information) to the user. Here, the metadata output to the user from the metadata processing unit 104 may vary depending on the application, but mainly in the case of DMB ECG metadata, information related to a program, that is, title, synopsis, genre, keyword, cast, etc. In addition to this, information about the segments constituting the program, that is, the title, synopsis, genre, keyword, cast, etc. of the segment may be included.

In this case, the DMB ECG metadata is generally received before the broadcast program is started, and the received DMB ECG metadata information is shown to the user so that the user can check various additional information about the broadcast program. The DMB ECG metadata may include program information and segment information, and the segment information may include time information of the corresponding segment and description of the segment.

The metadata conversion unit 105 converts the DMB ECG metadata received before the broadcast program starts into metadata of a form suitable for inclusion in the DMB AF file. That is, the metadata conversion unit 105 converts the previously received DMB ECG metadata to meet the standardized known DMB AF structure. Here, the DMB ECG metadata basically includes the schema of metadata included in the DMB AF file, and the schema is defined by adding / extending the necessary elements so that the DMB ECG metadata is appropriately adapted to the DMB AF metadata schema. I can convert it.

In this case, the metadata converter 105 converts segment information of metadata according to a recording time. In other words, the metadata conversion unit 105 converts the time information of the segment using the recording start time and the recording end time. At this time, it is difficult to accurately segment the recorded content unless the segment time information in the segment information is changed even though the schema transformation is simply performed. Therefore, segment start time and length information included in segment metadata should be changed. An example of this is as follows.

Program A (total length: 1000 seconds) consists of three segments, each segment S1 (start: 0 seconds, length: 100 seconds), S2 (start: 100 seconds, length: 500 seconds), S3 (start Assuming 600 seconds, 400 seconds in length) and 600 seconds in total from 200 seconds to 800 seconds after starting the program, the contents of the segment metadata are S2 (start: 0 seconds, length: 400 seconds), S3 (start: 400, length: 200).

The DMB AF generator 106 generates a DMB AF file by using the AV stream (broadcast stream) processed by the broadcast stream processor 102 and the metadata converted by the metadata converter 105. That is, the DMB AF generator 106 converts the AV stream (broadcast stream) processed by the broadcast stream processor 102 and the metadata converted by the metadata converter 105 into a standardized known DMB AF structure. Insert to create a DMB AF file.

The storage unit 107 stores the DMB AF file generated by the DMB AF generation unit 106.

2 is a diagram illustrating a process of converting segment information according to the present invention.

As shown in FIG. 2, the entire broadcast program may be divided into segments of a meaningful unit, and information about each segment may be described as metadata. The segment 201 for the entire program is generated in the process of authoring the metadata, and the generated metadata is transmitted to the broadcasting viewing terminal (digital multimedia broadcasting recording apparatus including the metadata) through a broadcasting network or a communication network before starting broadcasting. do.

However, the broadcast viewing terminal often records a part of a broadcast program, and in this case, if the segment 201 for the entire program generated in the authoring process is stored as it is, the recorded broadcast program and the entire program are recorded. The problem arises that the stored segments become inconsistent.

Therefore, it is necessary to convert the segment information of the metadata into segment information from the start point of recording (recording start time) to the end point of recording (recording end time). An example of this conversion is the segment of the recorded program of FIG. It is shown at 202.

3 is a flowchart illustrating a digital multimedia broadcasting recording method including metadata according to an embodiment of the present invention. Since the specific embodiments are the same as those described above in the device description, only the technical gist of the digital multimedia broadcasting recording method will be described here. It will be briefly explained.

First, the metadata receiver 103 receives metadata (301).

Thereafter, the metadata processor 104 processes the metadata received through the metadata receiver 103 (302).

The broadcast stream receiving unit 101 receives the broadcast stream (303).

Thereafter, the broadcast stream processor 102 processes the broadcast stream received through the broadcast stream receiver 101 (304).

The metadata converter 105 converts the metadata processed by the metadata processor 104 according to the recording time (305).

Thereafter, the DMB AF generator 106 generates and stores the broadcast stream (AV stream) processed by the broadcast stream processor 102 and the metadata converted by the metadata converter 105 as a DMB AF file ( 306).

4 is a diagram illustrating an embodiment of a DMB AF reproduction UI of an entire program according to the present invention.

As shown in FIG. 4, the playback window 401 plays a program like a conventional playback device so that a user can view it.

The metadata display window 402 displays information that can be described as metadata so that a user can check it. Information that can be described by the metadata includes title, genre, keyword, synopsis, and cast information in a program unit or segment unit.

The segment navigation window 403 shows segment images and segment section length information of the program being played. The user can click on a specific segment to play the desired segment, at which time information about the segment selected by the user is displayed in the metadata display window 402.

5 is a diagram illustrating an embodiment of a DMB AF reproduction UI in which a part of a program according to the present invention is recorded.

The functions of the playback window 501 and the metadata display window 502 shown in FIG. 5 are the same as those of the playback window 401 and the metadata display window 402 described with reference to FIG. 4, respectively.

Meanwhile, the function of the changed segment navigation window 503 is the same as that of the segment navigation window 403 of FIG. 4, but the contents shown in the changed segment navigation window 503 are different from the contents of the segment navigation window 403. For example, if there are four segments for the entire program, but the recording is from the middle of the second segment to the middle of the last segment, the contents and the length of the segment are changed accordingly.

The apparatus described above may be implemented in hardware, software or a combination thereof. In a hardware implementation, the modules used for broadcast recording may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing units (DSPDs), programmable logic units (PLDs), field programmable gate arrays. (FPGA), a processor, a controller, a micro-controller, a microprocessor, another electronic unit designed to perform the functions described herein, or a combination thereof. The software may be implemented through a module that performs the functions described herein. The software code may be stored in memory units and executed by a processor. The memory unit may be implemented inside or outside the processor, in which case the memory may be coupled to the processor via various known means.

On the other hand, the method of the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. And the recording medium includes all types of recording media (intangible medium such as a carrier wave as well as tangible media such as CD and DVD) readable by a computer.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention can be used for broadcast viewing terminals.

1 is a block diagram of an embodiment of a digital multimedia broadcasting recording apparatus including metadata according to the present invention;

2 is a view for explaining a conversion process of segment information according to the present invention;

3 is a flowchart illustrating a digital multimedia broadcasting recording method including metadata according to the present invention;

4 is a diagram illustrating an embodiment of a DMB AF reproduction UI of an entire program according to the present invention;

5 is a diagram illustrating an embodiment of a DMB AF reproduction UI in which a part of a program according to the present invention is recorded.

* Explanation of symbols for the main parts of the drawings

101: broadcast stream receiving unit 102: broadcast stream processing unit

103: metadata receiving unit 104: metadata processing unit

105: metadata conversion unit 106: DMB AF generation unit

107: storage unit

Claims (8)

In the broadcast recording device, Broadcast stream receiving means for receiving a broadcast stream; Broadcast stream processing means for processing the received broadcast stream; Metadata receiving means for receiving metadata; Metadata processing means for processing the received metadata; Metadata conversion means for converting the processed metadata according to a recording time; DMB AF generating means for generating the processed broadcast stream and the converted metadata into a Digital Multimedia Broadcasting Application Format (DMB AF) file; And Storage means for storing the generated DMB AF file Broadcast recording device comprising a. The method of claim 1, The metadata includes segment information, And the metadata converting means converts the segment information of the metadata in accordance with the recording time. The method of claim 2, The segment information includes time information of the segment, And the metadata converting means converts the time information of the segment using the recording start time and the recording end time. 4. The method according to any one of claims 1 to 3, The DMB AF generating means, And a broadcast stream processed by the broadcast stream processing means and metadata converted by the metadata conversion means are inserted into a DMB AF structure to generate a DMB AF file. In the broadcast recording method, Receiving and processing metadata; Receiving and processing a broadcast stream; A metadata conversion step of converting the processed metadata according to a recording time; A DMB AF generating step of generating the processed broadcast stream and the converted metadata into a Digital Multimedia Broadcasting Application Format (DMB AF) file; And Storing the generated DMB AF file Broadcast recording method comprising a. The method of claim 5, The metadata includes segment information, The metadata conversion step, the broadcast recording method for converting the segment information of the metadata in accordance with the recording time. The method of claim 6, The segment information includes time information of the segment, The metadata conversion step, the broadcast recording method of converting the time information of the segment using the recording start time and recording end time. The method according to any one of claims 5 to 7, The DMB AF generation step, And inserting the processed broadcast stream and the converted metadata into a DMB AF structure to generate a DMB AF file.

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