WO2005020580A1 - Apparatus and method for converting media stream for multimedia service in dab system - Google Patents

Apparatus and method for converting media stream for multimedia service in dab system Download PDF

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Publication number
WO2005020580A1
WO2005020580A1 PCT/KR2003/002914 KR0302914W WO2005020580A1 WO 2005020580 A1 WO2005020580 A1 WO 2005020580A1 KR 0302914 W KR0302914 W KR 0302914W WO 2005020580 A1 WO2005020580 A1 WO 2005020580A1
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WO
WIPO (PCT)
Prior art keywords
transport stream
eti
media
stream
media transport
Prior art date
Application number
PCT/KR2003/002914
Other languages
French (fr)
Inventor
Byung-Jun Bae
Jin-Hwan Lee
Yong-Hoon Lee
Sam-Mo Cho
Young-Ho Jeong
Young-Kwon Hahm
Soo-In Lee
Original Assignee
Electronics And Telecommunications Research Institute
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
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to AU2003288780A priority Critical patent/AU2003288780A1/en
Priority to DE10394289T priority patent/DE10394289T5/en
Priority to CN2003801106003A priority patent/CN1860790B/en
Priority to MXPA06002255A priority patent/MXPA06002255A/en
Publication of WO2005020580A1 publication Critical patent/WO2005020580A1/en

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Classifications

    • 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
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/95—Arrangements characterised by the broadcast information itself characterised by a specific format, e.g. MP3 (MPEG-1 Audio Layer 3)
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/23406—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving management of server-side video buffer
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/23418—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2381—Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • 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
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]

Definitions

  • the present invention relates to an apparatus and a method for converting a moving picture experts group-2 (MPEG-2) stream into a digital audio broadcasting (DAB) data stream for providing a multimedia service in a DAB transmission system and a computer readable recording medium on which a program for implementing the method is recorded.
  • MPEG-2 moving picture experts group-2
  • DAB digital audio broadcasting
  • a digital audio br adcasting (DAB) system having an enhanced reception in the movement state is one contrived approach.
  • DAB digital audio br adcasting
  • An initially developed DAB transmission system has been used mainly for the purpose of digitalizing an audio broadcasting and transmitting digitalized data at a low speed.
  • MPEG-2 moving picture experts group-2
  • MPEG-2 can be used to incorporate multimedia data encoded through diverse methods into the DAB transmission system. The use of MPEG-2 system is advantageous in multiplexing, synchronizing and transmitting multimedia data.
  • the DAB transmission system includes audio sources 101, audio encoders 102, an ensemble multiplexer 103, and an orthogonal frequency division multiplexing (OFDM) encoder 104. Since the conventional DAB transmission system is applied to digitalize an analog audio broadcasting, the conventional DAB transmission system is established mainly with focus of an audio broadcasting. In detail, the audio sources 101 are encoded' in the audio encoders 102 and are then transmitted through the OFDM encoder 104 by being multiplexed in the ensemble multiplexer 103. Although there is partially provided a low speed transmission of digital data, it is difficult to provide a multimedia service including real time moving pictures through the use of the conventional DAB transmission system.
  • OFDM orthogonal frequency division multiplexing
  • an object of the present invention to provide a media stream conversion apparatus and a method thereof capable of providing a multimedia service by converting multimedia data in compliance with ' a moving picture experts group-2 system into a digital audio broadcasting (DAB) data stream in . a DAB transmission system. It is another object of the present invention to provide a computer readable recording medium on which a program for implementing the method is recorded.
  • DAB digital audio broadcasting
  • Fig. 2 is a diagram showing an embodied configuration of a media stream conversion apparatus for providing a multimedia service in a digital audio broadcasting (DAB) transmission system in accordance with the present invention.
  • Streams for providing a multimedia broadcasting service inputted to the media stream conversion apparatus includes a ' video steam, an audio stream, a system information stream and so on based on the MPEG-2 system.
  • the MPEG-2 system based stream is inputted through a physical interface widely used in digital broadcasting transmission. Examples of such physical interface are the 310M standard defined by the society of motion picture and television engineers (SMPTE) and the digital video broadcast asynchronous serial interface (DVB-ASI) standard.
  • FIG. 5 is a flowchart showing a method for converting a media stream for providing a multimedia service in a DAB transmission system in accordance with the present invention.
  • an MPEG-2 TS is firstly inputted, and at step 502, the MPEG-2 TS is arrayed in a packet unit. Then, an effective transmission rate of the inputted MPEG-2 TS is estimated and information on configuration of the inputted MPEG-2 TS is analyzed at step 503.
  • the analyzed MPEG-2 stream is temporarily stored into an MPEG-2 TS buffering unit.
  • information necessary for configuring ETI frames is inputted by a system manager through the use of a GUI, and the analyzed information on configuration of the MPEG-2 stream is expressed. Also, the information necessary for configuring the ETI frames is implemented.
  • a required stream for configuring one ETI frame is read from the MPEG-2 TS buffering unit on the basis of the ETI frame configuration information. Then, the ETI frames are configured with use of the read stream.
  • the configured ETI frames are converted into a physical form and are subsequently transmitted.

Abstract

Disclosed are a media stream conversion apparatus and a method for providing a multimedia service in a digital audio broadcasting (DAB) transmission system. First, multimedia data stream based on a moving picture experts group-2 (MPEG-2) system is analyzed to transmit multimedia data following the MPEG-2 system standard. Then, with use of the analyzed information, the multimedia data stream is reconstructed as an ensemble transport interface (ETI) frame in compliance with the ETI frame transport standard. The ETI frames are then converted into a DAB data stream, thereby providing a multimedia service in a DAB transmission system.

Description

APPARATUS AND METHOD FOR CONVERTING MEDIA STREAM FOR MULTIMEDIA SERVICE IN DAB SYSTEM
Technical Field
The present invention relates to an apparatus and a method for converting a moving picture experts group-2 (MPEG-2) stream into a digital audio broadcasting (DAB) data stream for providing a multimedia service in a DAB transmission system and a computer readable recording medium on which a program for implementing the method is recorded.
Background Art
There have been various attempts to meet a high demand on providing a multimedia broadcasting service including moving pictures- even in the states of movement. A digital audio br adcasting (DAB) system having an enhanced reception in the movement state is one contrived approach. An initially developed DAB transmission system has been used mainly for the purpose of digitalizing an audio broadcasting and transmitting digitalized data at a low speed. However, it has been currently focused on applying the DAB transmission system for providing a multimedia service including moving pictures by using the DAB transmission system. A moving picture experts group-2 (MPEG-2) system can be used to incorporate multimedia data encoded through diverse methods into the DAB transmission system. The use of MPEG-2 system is advantageous in multiplexing, synchronizing and transmitting multimedia data. However, despite that the DAB transmission system can take advantage of the MPEG-2 system, the DAB system does not have an interface standard set in consideration of incorporating multimedia data. Thus, it is necessary to adjust the interface standards of the two systems in order to incorporate the multimedia data using the MPEG-2 system into the DAB transmission system. That is, an ensemble transport interface (ETI) is one of interfaces for the DAB transmission system and thus, it is necessary to have an apparatus for converting an MPEG-2 transport stream (TS) into the ETI frames in real time. Fig. 1 is a diagram showing an exemplary configuration of a conventional DAB transmission system. As shown, the DAB transmission system includes audio sources 101, audio encoders 102, an ensemble multiplexer 103, and an orthogonal frequency division multiplexing (OFDM) encoder 104. Since the conventional DAB transmission system is applied to digitalize an analog audio broadcasting, the conventional DAB transmission system is established mainly with focus of an audio broadcasting. In detail, the audio sources 101 are encoded' in the audio encoders 102 and are then transmitted through the OFDM encoder 104 by being multiplexed in the ensemble multiplexer 103. Although there is partially provided a low speed transmission of digital data, it is difficult to provide a multimedia service including real time moving pictures through the use of the conventional DAB transmission system. Especially, a DAB transmission system based on the Eureka 147 which is typically used in Europe and the MPEG-2 system have different intended services from each other, and thus, these two systems have different interfaces, resulting in incompatibility with a currently adopted system. Disclosure of the Invention
It is, therefore, an object of the present invention to provide a media stream conversion apparatus and a method thereof capable of providing a multimedia service by converting multimedia data in compliance with' a moving picture experts group-2 system into a digital audio broadcasting (DAB) data stream in . a DAB transmission system. It is another object of the present invention to provide a computer readable recording medium on which a program for implementing the method is recorded. In accordance with the present invention, there is provided a media stream conversion apparatus for providing a multimedia service in a digital audio broadcasting (DAB) transmission system, including: a media transport stream receiving unit for receiving a media transport stream; a media transport stream analyzing unit for estimating a transmission rate of the media transport stream received at the media transport stream receiving unit and checking a state of the received media transport stream; a system managing unit for which a system manager inputs and outputs controlling information through a graphic user interface; a system controlling unit for receiving a control signal from the media transport stream analyzing unit and the system managing unit and transmitting the control signal to the system; a media transport stream storing unit for temporarily storing the media transport stream outputted from the media transport analyzing unit; an ensemble transport interface (ETI) frame managing unit for controlling the media transport stream storing unit and processing the control signal provided from the system controlling unit to configure ETI frames; an ETI frame ■ configuring unit for configuring the ETI frames by using the media transport stream stored in the media transport stream storing unit; and an ETI transmitting unit for transmitting the ETI frames outputted from the ETI frame configuring unit in a physical form. In accordance with the present invention, there is provided a method for converting a media stream for providing a multimedia service in a digital audio broadcasting (DAB) transmission system, including the steps of: arraying an inputted media stream in a packet unit, estimating an effective transmission rate of the inputted media transport stream and analyzing information on configuration of the inputted media transport stream; temporarily storing the analyzed media transport stream into a media transport stream buffering unit; receiving information necessary for configuring ETI frames inputted by a system manager through the use of a graphic user interface, „ expressing the analyzed information on the media transport stream configuration and implementing the information necessary for configuring ETI frames; reading a transport stream necessary for configuring one ETI frame from the media transport stream buffering unit based on the information on the ETI frame configuration and configuring
ETI frames with use of the media transport stream; and transmitting the ETI frames converted into a physical form. In accordance with the present invention, there is provided a computer readable recording medium storing instructions for implementing a method for converting a media stream for providing a multimedia service in a digital audio broadcasting transmission system, wherein the method includes the steps of: arraying an inputted media stream in a packet unit, estimating an effective transmission rate of the inputted media transport stream and analyzing information on configuration of the inputted media transport stream; temporarily storing the analyzed media transport stream into a media transport stream buffering unit; receiving information necessary for configuring ensemble transport interface" (ETI) frames by a system manager through the use of a graphical user interface, expressing the analyzed information on the media transport stream configuration and implementing the information necessary for configuring ETI frames; reading a media transport stream necessary for configuring one ETI frame from the media transport stream buffering unit based on the information on the ETI frame configuration and configuring the ETI frames with use of the media transport stream; and transmitting the ETI frames converted into a physical form. '
Brief Description of the Drawings Other objects and aspects of the invention will become apparent from the following description of the embodiments with reference to the accompanying drawings, in which: Fig. 1 is a diagram showing an exemplary configuration of a conventional digital audio broadcasting (DAB) transmission system; Fig. 2 is a diagram showing an embodied configuration of a media stream conversion apparatus for providing a multimedia service in a DAB transmission system in accordance with the present invention; Fig. 3 is a detailed diagram showing an embodied ensemble transport interface (ETI) frame configuring unit of a media stream conversion apparatus in accordance with the present invention; Fig. 4 is a diagram showing an exemplary case of applying a media stream conversion apparatus in accordance with the present invention; and Fig. 5 is a flowchart showing a method for converting a media stream for providing a multimedia service in a DAB transmission system in accordance with the present invention. Best Mode for Carrying out the Invention
Hereinafter, an apparatus and a method for converting a media stream for providing a multimedia service in a digital audio broadcasting (DAB) transmission system in accordance with a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fig. 2 is a diagram showing an embodied configuration of a media stream conversion apparatus for providing a multimedia service in a digital audio broadcasting (DAB) transmission system in accordance with the present invention. As shown, the media stream conversion apparatus includes a moving picture experts group-2 (MPEG-2) transport stream (TS) receiving unit 201 for receiving an MPEG-2 TS, an MPEG-2 TS analyzing unit 202 for estimating a transmission rate of the MPEG-2 TS received at the MPEG-2 TS receiving unit 201 and checking a status of the inputted MPEG-2 TS, a system managing unit 205 in which a system manager inputs and outputs controlled information through a graphical user interface (GUI) , a system controlling unit 206 for receiving a control signal from the MPEG-2 TS analyzing unit 202 and the system managing unit 205 and transmitting the control signal to an ensemble transport interface (ETI) frame configuring unit 204, an MPEG-2 TS buffering unit 203 for temporarily storing the MPEG-2 TS outputted from the MPEG-2 TS analyzing unit 202, an ETI frame managing unit 207 for controlling the MPEG-2 TS buffering unit 203 and processing a control signal from the system controlling unit 206 in order to configure ETI frames, the ETI frame configuring unit 204 for configuring the ETI frames by using the MPEG-2 TS of the MPEG-2 TS buffering unit 203, and an ETI transmitting unit 208 for transmitting the ETI frames outputted from the ETI frames configuring unit 204 in a physical level. Streams for providing a multimedia broadcasting service inputted to the media stream conversion apparatus includes a ' video steam, an audio stream, a system information stream and so on based on the MPEG-2 system. The MPEG-2 system based stream is inputted through a physical interface widely used in digital broadcasting transmission. Examples of such physical interface are the 310M standard defined by the society of motion picture and television engineers (SMPTE) and the digital video broadcast asynchronous serial interface (DVB-ASI) standard. The MPEG-2 TS receiving unit 201 arrays the inputted MPEG-2 stream in a packet unit and sends the arrayed MPEG-2 stream to the MPEG-2 TS analyzing unit 202, which in turn, estimates an effective transmission rate of the MPEG-2 stream and then sends this estimated transmission rate to the system controlling unit 206. Also, the MPEG-2 TS analyzing unit 202 analyzes information on configuration of the inputted MPEG-2 stream and sends this analyzed information to the- system managing unit 205 through the system controlling unit 206. The information on configuration of the MPEG-2 stream is obtained by analyzing a piece of program specific information (PSI) included in the inputted MPEG-2 stream. The system managing unit 205 displays this analyzed information through a graphic user interface (GUI) to make a system manager see. The MPEG-2 stream analyzed by the MPEG-2 TS analyzing unit 202 is stored into the MPEG-2 TS buffering unit 203. The system managing unit 205 is inputted with a piece of information necessary for configuring an ETI frame from a system manager through a GUI and expresses the information on configuration of the analyzed MPEG-2 stream. Also, the system managing unit 205 continuously shares information with .the system controlling unit 206. Herein, among various data interfaces of the DAB transmission system, the ETI frame is a frame interface most suitable for transmitting the MPEG-2 stream. The system controlling unit 206 serving a role in controlling the suggested system transmits the information on the analyzed MPEG-2 stream to the system managing unit 205 and receives information necessary for configuring the ETI frames from the system managing unit 205. This information necessary for configuring the ETI frames is transmitted to the ETI frame managing unit 207 so as to be used when the ETI frames are configured. Also, the system controlling unit 206 sends the estimated transmission rate of the MPEG-2 stream to the ETI frame managing unit 207. The ETI frame managing unit 207 manages parts related to the configuration of the ETI frames and provides values required for configuring the ETI frames to the ETI frame configuring unit 204. Also, the ETI frame managing unit 207 determines amounts of the MPEG-2 stream necessary for configuring one ETI frame and provides this information on the estimated amounts to the ETI frame configuring unit 204. The ETI frame configuring unit 204 reads a required stream for configuring one ETI frame from the MPEG-2 TS buffering unit 203 on the basis of information provided by the ETI frame managing unit 207 and configures the ETI frames with use of the read stream. The ETI frame transmitting unit 208 converts the configured ETI frames into a physical form and then transmits the converted ETI frames. Fig. 3 is a detailed diagram showing an ETI frame configuring unit 204 of a media stream conversion apparatus in accordance with a preferred embodiment of the present invention. As shown, the ETI frame configuring unit 204 includes a message processing unit 301, a fast information channel (FIC) configuring unit 302, an ETI field configuring unit 303, a multiplexing unit 304, and a main service channel (MSC) configuring unit 305. Herein, the message processing unit 301 obtains information required for configuring ETI frames from an ETI frame managing unit 207. The MSC configuring unit 305 analyzes a transmission rate of an MPEG-2 stream sent by the message processing unit 301 and determines an amount of the MPEG-2 stream that needs to be inserted into each ETI frame. Then, the MSC configuring unit 305 reads the MPEG-2 stream as much as the predetermined amount set by an MPEG-2 TS buffering unit 203. The FIC configuring unit 302 configures a FIC based on information on the FIC configuration provided from the message processing unit 301. The ETI field configuring unit 303 configures an ETI frame configuration field based on a value of the ETI frame configuration field provided from the message processing unit 301. The multiplexing unit 304 multiplexes the values obtained from the MSC configuring unit 305, the FIC configuring unit 302 and the ETI field configuring unit 303 to complete the ETI frame configuration. Also, the multiplexing unit 304 receives a streaming control signal from the message processing unit 301 such that the ETI frame has a period of approximately 24 ms and transmits the completed ETI frames to an ETI frame transmitting unit 208. Generally, the ETI frame includes an ETI frame configuration field, a FIC and an MSC, and one ETI frame includes a period of approximately 24 ms . The message processing unit 301 obtains information required for configuring ETI frames from the ETI frame managing unit 207. Herein, the information provided from, the ETI frame managing unit 207 includes the transmission rate of the MPEG-2 stream, the ETI frame configuration field value and the FIC configuration value. Meanwhile, the message processing unit 301 sends the transmission rate of the MPEG-2 stream, the ETI frame configuration field value and the FIC configuration information to the MSC configuring unit 305, the ETI field configuring unit 303 and the FIC configuring unit 302, respectively. Also, a scheduling control signal is transmitted to the multiplexing unit 304 so that the configured ETI frames have an , adequate transmission period corresponding to an appointed standard. The MSC configuration unit 305 analyzes the transmission rate of the MPEG-2 stream sent by the message processing unit 301 and determines an amount of the MPEG-2 stream that needs to be inserted into each ETI frame and reads the stream as much as the predetermined amount set by the MPEG-2 TS buffering unit 203. The FIC configuring unit 302 configures the FIC based on the information on the FIC configuration provided from the message processing unit 301. The ETI field configuring unit 303 configures the ETI frame configuration field based on the ETI frame configuration field value provided from the message processing unit 301. The multiplexing unit 304 multiplexes each value generated from each block, i.e., the MSC configuring unit 305, the FIC configuring unit 302 and the ETI field configuring unit 303, to complete the ETI frames. Then, the multiplexing unit 304 receives the streaming control signal from the message processing unit 301 such that the ETI frame has a period of approximately 24 ms and transmits the completed ETI frames to the ETI frame transmitting unit 208. Fig. 4 is a diagram showing an exemplary case of applying an MPEG-2 stream conversion apparatus in accordance with the present invention. Especially, the MPEG-2 stream conversion apparatus is applied to a conventional DAB transmission system. Multimedia data based on the MPEG-2 system are inputted into the conventional DAB transmission system through the MPEG-2 stream conversion apparatus and are used to provide a multimedia service with use of a DAB network which is powerful in a wireless reception. Fig. 5 is a flowchart showing a method for converting a media stream for providing a multimedia service in a DAB transmission system in accordance with the present invention. At step 501, an MPEG-2 TS is firstly inputted, and at step 502, the MPEG-2 TS is arrayed in a packet unit. Then, an effective transmission rate of the inputted MPEG-2 TS is estimated and information on configuration of the inputted MPEG-2 TS is analyzed at step 503. At step 504, the analyzed MPEG-2 stream is temporarily stored into an MPEG-2 TS buffering unit. Next, at step 505, information necessary for configuring ETI frames is inputted by a system manager through the use of a GUI, and the analyzed information on configuration of the MPEG-2 stream is expressed. Also, the information necessary for configuring the ETI frames is implemented. At step 506, a required stream for configuring one ETI frame is read from the MPEG-2 TS buffering unit on the basis of the ETI frame configuration information. Then, the ETI frames are configured with use of the read stream. Lastly, at. step 507, the configured ETI frames are converted into a physical form and are subsequently transmitted. The above descried method can be implemented as a program which can be stored into a computer readable recording medium such as a CD-ROM, a RAM, a ROM, a floppy disk, a hard disk, a magneto-optical disk, or the like. In accordance with the present invention, there is an effect that multimedia data based on the MPEG-2 system can be applicable to the conventional DAB transmission system for providing a multimedia broadcasting service including moving pictures even under a wireless reception condition. Also, the MPEG-2 stream is converted into the ETI frame compatible with the DAB transmission system in order for the MPEG-2 stream to be transmitted under the DAB transmission system. Thus, it is possible to provide a stable multimedia broadcasting service through using a DAB network even under a wireless reception condition along with taking advantages of the MPEG-2 system standard capable of multiplexing and synchronizing. Although the preferred embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that . various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

What is claimed is:
1. A media stream conversion apparatus for providing a multimedia service in a digital audio broadcasting (DAB) transmission system, comprising: a media transport stream receiving means for receiving a media transport stream; a media transport stream analyzing means for calculating a transmission rate of the media transport stream received at the media transport stream receiving means and checking a state of the received media transport stream; a system managing means for inputting and outputting controlling information through a graphic user interface by a system manager; a system controlling means for receiving a control signal from the media transport stream analyzing means and the system managing means to transmit the control signal to the system; a media transport stream storing means for temporarily storing the media transport stream outputted from the media transport analyzing means; an ensemble transport interface (ETI) frame managing means for controlling the media transport stream storing means and processing the control signal provided from the system controlling means to configure ETI frames; an ETI frame configuring means for configuring the ETI frames by using the media transport stream stored in the media transport stream storing means; and an ETI transmitting means for transmitting the ETI frames outputted from the ETI frame configuring means in a physical form.
2. The media stream conversion apparatus as recited in claim 1, wherein the media transport stream receiving means arrays a received moving picture experts . group-2 (MPEG-2) transport stream in a packet unit and then transmits the MPEG-2 transport stream to the media transport stream analyzing means.
3. The media stream conversion apparatus as recited in claim 1, wherein the media transport stream analyzing means plays a role in estimating an effective transmission rate of the MPEG-2 transport stream inputted from the media transport stream receiving means and transmitting the estimated effective transmission rate to the system controlling means and another role in analyzing information on configuration of the MPEG-2 transport stream and transmitting the information to the system managing means through the system controlling means.
4. The media stream conversion apparatus as recited in claim 3, wherein the information on configuration of the MPEG-2 transport stream is obtained by analyzing program specific information (PSI) of the inputted MPEG-2 transport stream and the analyzed information is displayed by the system managing means through the use of a graphical user interface to make a system manager recognize.
5. The media stream conversion apparatus as recited in claim 1, wherein the system managing means receives information necessary for configuring the ETI frames from a system manager through the use of a graphical user interface, expresses the analyzed information on the MPEG-2 transport stream configuration and shares information with the system controlling means continuously.
6. The media stream conversion apparatus as recited in claim 1, wherein the system controlling means transmits the information on the analyzed MPEG-2 transport stream to the system managing means, receives information necessary for configuring the ETI frames from the system managing means and transmits the transmission rate estimated by the media transport stream analyzing means to the ETI frame managing means.
7. The media stream conversion apparatus as recited in claim 1, wherein the ETI frame managing means manages information related to the ETI frame configuration, provides values necessary for configuring the ETI frames to the ETI frame configuring means and determines an amount of the necessary media transport stream for configuring one ETI frame to provide the determined amount to the ETI frame configuring means .
8. The media stream conversion apparatus as recited in claim 1, wherein the ETI frame configuring means includes: a message processing means for obtaining information for configuring ETI frames from the ETI frame managing means; a first configuration means for determining an amount of a media transport stream that needs to be inserted into each ETI frame by analyzing a transmission rate of the media transport stream sent by the message processing means and then reading the media transport stream as much as the determined amount from the media transport stream storing means; a second con iguration means for configuring a fast information channel (FIC) based on information on FIC configuration provided by the message processing means; a third configuration means for configuring ETI frame configuration field based on an ETI frame configuration field valve provided by the message processing means; and a multiplexing means for multiplexing values obtained from the first configuration means to the third configuration means to complete the ETI frame configuration and transmitting the ETI frames to the ETI frame transmitting means when receiving a streaming control signal from the message processing means such that the ETI frame includes a predetermined period.
9. The media stream conversion apparatus as recited in claim 8, wherein the information necessary for configuring the ETI frames provided from the message processing means includes a transmission rate of an MPEG-2' stream, an ETI frame configuration field value and a FIC configuration value.
10. The media stream conversion apparatus as recited in claim 8, wherein the predetermined period of the multiplexing means is approximately 24 ms .
11. The media stream conversion apparatus as recited in claim 8, wherein the media stream conversion apparatus is applicable to a terrestrial DAB system, a satellite DAB transmission system and an Eureka 147 standard based broadcasting system.
12. The media stream conversion apparatus as recited in claim 11, wherein the MPEG-2 stream is converted into an ETI interface and into an interface used in the Eureka 147 standard based broadcasting system including a service transport interface (STI) transmission control protocol (TCP) /internet protocol (IP).
13. A method for converting a media stream for providing a multimedia service in a digital audio broadcasting (DAB) transmission system, the method comprising the steps of: arraying an inputted media stream in a packet unit, calculating an effective transmission rate of the inputted media transport stream and analyzing information on configuration of the inputted media transport stream; temporarily storing the analyzed media transport stream into a media transport stream buffering unit; receiving information necessary for configuring ETI frames inputted by a system manager through the use of a graphic user interface, expressing the analyzed information on the media transport stream configuration and implementing the information necessary for configuring ETI frames; reading a transport stream necessary for configuring one ETI frame from the media transport stream buffering unit based on the information on the ETI frame configuration and configuring ETI frames with use of the media transport stream; and transmitting the ETI frames converted into a physical form.
14. The method as recited in claim 13, wherein the information on the media transport stream configuration is obtained by analyzing program specific information included in the inputted media transport stream and the analyzed information is recognized by a system manager through the use of a graphical user interface.
15. A computer readable recording medium storing instructions for implementing a method for converting a media stream for providing a multimedia service in a digital audio broadcasting transmission system, the method comprising the steps of: arraying an inputted media stream in a packet unit, calculating an effective transmission rate of the inputted media transport stream and analyzing information on configuration of the inputted media transport stream; temporarily storing the analyzed media transport stream into a media transport stream buffering unit; receiving information necessary for configuring ensemble transport interface (ETI) frames by a system manager through the use of a graphical user interface, expressing the analyzed information on the media transport stream configuration and implementing the information necessary for configuring ETI frames; reading a media transport stream necessary for configuring one ETI frame from the media transport stream buffering unit based on the information on the ETI frame configuration and configuring the ETI frames with use of the media transport stream; and transmitting the ETI frames converted into a physical form.
PCT/KR2003/002914 2003-08-26 2003-12-30 Apparatus and method for converting media stream for multimedia service in dab system WO2005020580A1 (en)

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AU2003288780A AU2003288780A1 (en) 2003-08-26 2003-12-30 Apparatus and method for converting media stream for multimedia service in dab system
DE10394289T DE10394289T5 (en) 2003-08-26 2003-12-30 Apparatus and method for converting a media stream for a multimedia service in the DAB system
CN2003801106003A CN1860790B (en) 2003-08-26 2003-12-30 Apparatus and method for converting media stream for multimedia service in dab system
MXPA06002255A MXPA06002255A (en) 2003-08-26 2003-12-30 Apparatus and method for converting media stream for multimedia service in dab system.

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KR100576543B1 (en) 2006-05-03
DE10394289T5 (en) 2007-07-05

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