KR20070082672A - Dmb content service system using tpeg - Google Patents

Abstract

A DMB(Digital Multimedia Broadcasting) contents service system using TPEG(Transport Protocol Expert Group) is provided to reduce data to be transmitted and simplify and quicken encoding/decoding operation by reducing a packetized overhead without passing an MPEG(Moving Picture Experts Group) SL(Sync Layer) packetization process when configuring a broadcasting stream in a general DMB system. A server includes a TPEG encoder(20), a DMB encoder(30), and a DMB transmitting unit(40). The TPEG encoder(20) encodes additional contents information. The DMB encoder(30) divides the additional contents information data encoded from the TPEG encoder(20) and DMB information data encoded from a DMB information encoder into TS(Transport Stream) packets of a stream type for transmitting DMB. The DMB transmitting unit(40) multiplexes the TS packets, which are generated from the DMB encoder(30) and inputted according to respective channels, and transmits the multiplexed TS packet. A client system includes a DMB decoder, a TPEG decoder, and a TPEG output unit. The DMB decoder decodes DMB stream data received from a DMB receiving unit, classifies video/audio broadcasting information and additional contents information, outputs the video/audio broadcasting information to a broadcasting play unit, and outputs the additional contents information to the TPEG decoder. The TPEG decoder generates a TPEG message by referring to the TPEG-encoded information. The TPEG output unit analyzes and classifies the TPEG message generated through the TPEG decoder, and provides the additional contents information through a terminal.

Description

DMB content service system using transmission standard specification (TPM) {DMB Content service system using TPEG}

1 is a block diagram schematically illustrating a configuration of a general DMB system.

2 is a flowchart illustrating a process of configuring a broadcast transport stream in a conventional DMB system.

3 is a block diagram showing a server content providing-side server system configuration in a DM content service system using the present invention's transmission standard specification (TPEG);

4 is a block diagram showing a client side system configuration according to the present invention;

5 is a view showing an example of a TPEG packet encoded by the TPEG encoder in the present invention.

6 is a view showing an example of components used for traffic information in the present invention.

7 is a view showing an example of the components used in the tourist information in the present invention.

8 is a diagram illustrating an encoding process for configuring a transport stream (TS packet) performed in a DMB encoder according to the present invention.

9 is a diagram illustrating a data restoration process performed in a DMB decoder according to the present invention.

10 is a view showing an example of TPEG data decoded through TPEG decoding according to the present invention.

The present invention relates to a Digital Multimedia Broadcasting (DMB) content service system. The present invention relates to a European transport standard for providing traffic, road, and travel information content services using a transport protocol export group (TPEG), a European transport standard. TPEG: Transport Protocol Export Group (DMB).

Recently, a multimedia broadcasting service, which is called integrated service digital broadcasting (ISDB), is considered as part of a data service and is integrated into a comprehensive information broadcast.

DMB (Digital Multimedia Broadcasting) is one of them, and DMB is a next-generation multimedia service that enables users to watch and listen to TV and radio broadcasting through a terminal in any space through a mobile phone terminal, a personal digital assistant (PDA), a dedicated terminal, If you have a terminal, you can enjoy clear high-definition video and CD-level sound anytime, anywhere.

The DMB service uses the satellite DMB method, which is a method that satellites distribute to DMB terminals throughout the country when broadcasting programs are sent to satellites, and DMB broadcasts using the currently empty airwave VHF channel. It can be divided into the terrestrial DMB method that receives through the terminal.

This DMB is based on DAB (Digital Audio Broadcasting), a technology for digital radio, and the concept of multimedia broadcasting is added to send data information such as video and weather news location. CD-DVD-class high quality and high quality broadcasting can be enjoyed through a mobile terminal or a vehicle terminal, which is attracting attention as the next generation broadcasting.

The DMB system having such characteristics is composed of a server producing content using the MPEG-2 / 4 system and a client receiving a DMB broadcast transmitted from the server.

1 is a block diagram schematically illustrating a configuration of a DMB system.

On the server side for producing broadcast content, the general video or broadcast content is encoded through the MPEG-2 / 4 video / audio standard encoder 1.

The encoded video / audio is transmitted to the media server 3 after being multiplexed through the multiplexer 2.

The media server 3 transmits multiplexed MPEG-2 / 4 content in the stream mode of DAB, which is a DMB transmission standard.

The DMB transmission system 4 allows the terminal 5 equipped with the DMB receiver to receive information and to receive broadcast contents through each decoder.

In the standardization of the DMB service, compression and encoding are performed in the MPEG-4 system in consideration of the scalability of various data services, and then transmitted to the MPEG-2 system along with the meta information. In the MPEG-2 system, an AU (Access Unit) is input. Packetizes the data in MPEG-4 SL, packetizes it again in the form of MPEG-2 PES (Packetized ES), and transmits it in the form of MPEG2 TS (Transport).

2 is a diagram showing a transmission data format in a DMB broadcasting production server in a DMB system.

As described above, in the current DMB system, AU (Access Unit) for video, audio, content (AVC), etc. in video, audio, and data broadcasting is packetized into MPEG-4 SL (Synch-layer) packet. MPEG-2 PES packets are constructed, the PES packets are divided into TS packets, encoded, and transmitted to the client.

The present invention is to provide road, traffic and travel information as additional information that can be provided with DMB broadcasting in the DMB broadcasting system as described above, and to use the TPEG method for such additional information data.

TPEG is a broadcasting communication protocol for providing traffic and traveler information through digital broadcasting media, and the user performance system (visual, audio) includes application services and transmission characteristics in the multimedia environment, including encoding, decoding, and filtering of messages related to travel. Is a new protocol for transmitting traffic and travel-related information

 The TPEG is a type of broadcasting that compresses highway, national road, and city traffic information to spread information to an unspecified number of people.

Therefore, the present invention intends to propose an effective method for sending road, traffic, and travel information contents together in DMB broadcasting using the TPEG system.

DMB content service system using the present invention transmission standard (TPEG),

In the DMB system comprising a client-side system comprising a server for providing DMB content and a terminal means for receiving the DMB content provided from the server,

The server providing the DMB content includes TPEG encoding means for encoding road, traffic and travel information according to a broadcast communication protocol for providing DMB broadcasting, and TPEG data encoded through TPEG encoding means for DMB transmission. DMB encoding means for constructing a stream for PES packetization, divided into TS packets, and for transmission, and DMB transmission means for multiplexing with broadcast information streams and transmitting them through a channel,

The client system includes a TPEG decoding means for decoding the TPEG data included in the DMB decoded broadcasting information to generate a TPEG message, and interpreting and arranging the generated TPEG message to provide road, traffic and travel information. It is characterized in that the configuration.

The present invention having such a configuration will be described in detail below with reference to the embodiments shown in FIGS. 3 and 4.

The present DM content service system,

In the DMB system comprising a client-side system comprising a server for providing DMB content and a terminal means for receiving the DMB content provided from the server,

The server,

MPEG-4 encoder 10, which is a system encoding means for encoding video and audio DMB broadcasting information, TPEG encoder 20 for encoding road, traffic, and travel information, and MPEG-4 encoder 10 and TPEG. A system target encoder (STE) 30 for dividing broadcast information and additional content information (road, traffic, travel information) data encoded from the encoder 20 into TS packets in stream form for DMB transmission; And a DMB transmitter 40 for multiplexing and transmitting a transport stream (TS packet) generated by the encoder 30 and inputted for each channel.

The DMB encoder 30 is a PES packet unit for generating PES packets by PES packetizing broadcast information and additional content information data for each channel encoded by the MPEG-4 encoder 10 and the TPEG encoder 20 for each channel ( 31) and a TS packet section 32 constituting a stream for dividing and transmitting the PES packet generated from the PES packet section 31 into TS packets.

As shown in FIG. 4, the client-side system includes a DMB receiver 100 for receiving a DMB broadcast signal transmitted from the DMB transmitter 40 of the server, and DMB broadcast stream data received through the DMB receiver 100. Decode the video information to separate broadcasting information such as video / audio and additional content information such as traffic / tour information, and output broadcasting information such as video / audio to the broadcast reproducing unit 120, and additional content information of traffic and tourism information. The DMB decoder 110 outputs the TPEG decoder 130, the TPEG decoder 130 for generating a traffic and tourism TPEG message with reference to the TPEG encoded information, and the TPEG message generated through the TPEG decoder 130. It is configured to include a TPEG output unit 140 for analyzing, classifying and providing traffic and tourism information through the terminal.

The DMB decoder 110 stores the PES packet restore unit 111 for restoring the DMB broadcast stream TS packet data into the PES packet, and the PES packet restored through the PES packet restore unit 111 for the video / audio broadcast data or the TPEG message. The data restoration unit 112 to restore the data and the data restored by the video / audio broadcasting information or the TPEG message through the data restoration unit 112 and output the DMB broadcasting information to the broadcast playback unit 120, the TPEG message Is configured to include a TPEG data determination unit 113 output to the TPEG decoder 130.

Such a present invention,

A TPEG encoder 20 is configured in the server side system configured as shown in FIG.

As described above, the TPEG encoder 20 is a TPEG encoding means for encoding road, traffic and travel information according to a broadcast communication protocol for providing DMB broadcasting.

TPEG encoding conforms to the TPEG (Transport Protocol Export Group), which is a European transport standard standard, and will only be described in brief with reference to FIG. 5.

5 shows an example of a TPEG packet encoded via the TPEG encoder 20.

A TPEG message is a collection of several messages. It consists of a message management container, an RTM Event container, and a TPEG Location container.

The RTM Event container can express information such as traffic conditions to contain traffic information, and the TPEG Location container can express location information and so on to contain tourist information.

Each component can be used to represent traffic and tourism information.

6 illustrates an example of components used for traffic information, and FIG. 7 illustrates an example of components used for tourism information.

The DMB encoder 30 is a system encoder for encoding respective broadcast information such as video / audio, and constitutes a broadcast stream for transmitting DMB traffic and tourism data encoded through the TPEG encoder 20 according to the present invention.

As described above, the present invention is characterized in that the existing MPEG-4 SL packet process is omitted, and the PES packet and TS packet configuration in the MPEG-2 system is immediately performed.

8 is a diagram illustrating a process of configuring a broadcast stream (TS packet) by the DMB encoder 30.

PES packets are formed by PES packetization of video / audio broadcast information or TPEG message data, and PES packets are divided into TS packets to form broadcast streams.

AU (Access Unit) means a basic unit of data. If the video is one screen (I-frame), the audio is a frame (frame), if the data can be any unit (unit).

The DMB decoder 120 configured in the client side system is decoding means for restoring broadcast stream data (TS packets) encoded through the DMB encoder 30 as described above.

9 is a diagram illustrating a process of restoring a broadcast stream (TS packet) by a DMB decoder 120 to a TPEG message including DMB broadcast information or traffic and tourism information.

The TPEG decoder 130 is a means for restoring information encoded by the TPEG encoder 20, and shows a process of restoring the TPEG packet in FIG.

Referring to the operation of the DMB content service system using the present invention's transmission standard specification (TPEG) having such a configuration as follows.

It configures a stream (TS) packet for receiving and transmitting broadcast information such as video / audio encoded through the MPEG4 encoder 10 and traffic and tourism information encoded through the TPEG encoder 20 from the DMB encoder 30, respectively. do.

This is illustrated in FIG. 8.

The PES packet section 31 of the DMB encoder 30 forms a PES packet by PES packetizing broadcast information or TPEG message data, and divides the PES packet configured in the TS packet section 32 to form a TS packet.

The broadcast stream configured as described above is output to the DMB transmitter 40, and the DMB transmitter 40 multiplexes and transmits the broadcast stream input for each channel.

The client-side system receives the same broadcast stream (TS packet) through the DMB receiver 100 and decodes the received broadcast stream in the DMB decoder 110 to broadcast original data, that is, broadcast data such as video and audio. Or generate a TPEG message.

This DMB decoder 110 means to generate the original AU through the reverse process of the encoding process of the DMB encoder 30.

The process is shown in FIG.

The TPEG judging unit 113 checks the data AU generated as described above so that the broadcast data is output to the broadcast reproducing unit 120 to be broadcast reproduced and output, and the TPEG message is output to the TPEG decoder 130.

The TPEG decoder 130 generates TPEG data through the same process as in FIG. 10 and outputs traffic / tourist information through the TPEG output unit 140.

In the present invention as described above, the traffic / tourist information is composed of additional content information of the DMB, and then various additional content information for providing to the DMB receiver can be configured.

In addition, since the server-side system includes a TPEG ML (Markup Language) generator, it is possible to receive the data through a PDA or the like which is capable of wireless Internet in a state in which terrestrial or satellite DMB cannot be received.

As described above, the present invention proposes an effective method for providing additional content information through DMB. In a general DMB system, a packetization process is performed by avoiding MPEG SL packetization in constructing a broadcast stream. By reducing the head, the data to be transferred can be reduced, making encoding / decoding simpler and faster.

In addition, since the European Community (EC) started developing in TPEG in 1997, developed countries such as Europe, the United States, and Japan have participated in the development work. Currently, international standardization is progressing mainly in the European Broadcasting Union and the TPEG Forum. According to the present invention system which transmits information through media such as terrestrial / satellite digital multimedia broadcasting (DMB) using TPEG, which is a transmission standard, by data-transforming traffic / tour information, it is possible to preoccupy a technical advantage in standardization work. have.

In addition, since traffic / tour information is provided through DMB, it is possible to overcome the disadvantages of errors and upgrades of existing navigation, and to provide various traffic / tour information to users regardless of time and place. .

Claims (6)

In the DMB system comprising a client-side system comprising a server for providing DMB content and a terminal means for receiving the DMB content provided from the server, The server, And further comprising TPEG encoding means for encoding the additional content information, and for transmitting DMB broadcast information data encoded from the TPEG encoding means and DMB broadcast information data encoded from the DMB broadcast information encoding means such as video and audio. DMB system encoding means for dividing into TS packets in a stream form, and DMB transmitting means for multiplexing and transmitting transport streams (TS packets) generated by the DMB encoding means for each channel, The client-side system decodes the DMB broadcast stream data received from the DMB receiving means to distinguish broadcasting information such as video / audio and additional content information, and outputs broadcasting information such as video / audio to the broadcast reproducing means, and additional content information. DMB decoding means for outputting to TPEG decoding means, TPEG decoding means for generating TPEG message with reference to TPEG encoded information, and TPEG message generated through TPEG decoding means for analyzing and classifying additional content information through the terminal. DMB content service system using a transmission standard (TPEG), characterized in that it comprises a TPEG output means for providing. 2. The apparatus of claim 1, wherein the DMB encoding means comprises: PES packetizing means for generating a PES packet by PES packetizing broadcast information and additional content information data for each channel encoded from the broadcast information encoding means and the TPEG encoding means for each channel; And TS packetizing means for constructing a stream for dividing and transmitting the PES packet generated from the PES packetizing means into TS packets, The DMB decoding means comprises: PES packet restoring means for restoring the DMB broadcast stream TS packet data into a PES packet, data restoring means for restoring the PES packet restored through the PES packet restoring means into a video / audio broadcast data or a TPEG message; It includes a TPEG data determination means for checking the broadcast information, such as video / audio or the data restored to the TPEG message through the data restoration means to output the DMB broadcast information to the broadcast playback means, and output the TPEG message to the TPEG decoding means. DMB content service system using a transmission standard (TPEG), characterized in that. The DMB content service system according to claim 1 or 2, wherein the additional content information generated in the TPEG message is road, traffic, or tourism information. In the DMB implementation method in the DMB system, A process of constructing a TPEG message by encoding additional content information according to TPEG and a process of constructing a transport stream by encoding the TPEG message with DMB broadcasting information such as encoded video and audio; The client side system decodes the DMB transport stream, checks the TPEG message including the additional content information, outputs the DMB broadcast information through the broadcast reproducing means, restores the additional content information through the TPEG decoding, and restores the TPEG message. To provide data through DMB broadcasting, DMB content service method using a transmission standard (TPEG), characterized in that comprises The method of claim 4, wherein the process of constructing a transport stream by DMB encoding the TPEG message together with the DMB broadcast information comprises: Generating a PES packet by PES packetizing a TPEG message or encoded DMB broadcast data, and constructing a transport stream by dividing the PES packet into TS packets; The DMB decoding of the received broadcast stream includes restoring a TS packet to a PES packet and restoring the recovered PES packet to original broadcast information or a TPEG message. DMB content service method using (TPEG). The method of claim 4 or 5, wherein the additional content information is road, traffic, and tourism information.

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