KR100622257B1 - Method for handling text back-link by using specification of MPEG-2 Transport Stream - Google Patents

Abstract

The present invention relates to a text back-link processing method using the MPEG-2 transport stream standard, and is configured to process various text information required for an interactive service using a private section. At this time, the indication that the contents of the section is for private use and the PID of the packet with the private section are set in the PMT (Program Map Table). The text contained in the private section is extracted from the DMB receiver and displayed on the display screen. In particular, when the DMB receiver is a mobile communication terminal, various applications are possible, such as being able to immediately call a telephone number of an order reception center displayed while watching a home shopping broadcast.

Using the present invention, it is possible to easily configure the text back-link in the mobile environment without large change of the DMB standard.

MPEG-2 TS, Digital Multimedia Broadcasting, DMB, PMT, private, text

Description

Method for handling text back-link by using specification of MPEG-2 Transport Stream}             

1 is an overview constituting an MPEG-2 transport stream;

2 shows the form of an MPEG-2 transport stream;

3 is a flow chart of a preferred embodiment according to the present invention;

4 is a structure of a PMT,

5 is the structure of the private section

6 is an example in which a phone number for an interactive service is displayed on a mobile phone screen;

7 is an example in which the present invention is applied to a mobile phone watching a home shopping broadcast.

* Explanation of symbols for main parts of the drawings

11: DMB receiver 12: DMB receiver

40: PMT 41: 'stream type' field

42: 'elementary PID' field 50: private section

51: 'table id' field 52: 'private indicator' field

53: 'private data' field 60: Mobile phone

The present invention relates to a text back-link processing method using the MPEG-2 transport stream specification. In particular, the present invention relates to text-backlinks such as a phone number or an account number for online payment through a private section of the MPEG-2 transport stream specification. The present invention relates to a method for enabling an interactive service in a digital multimedia broadcasting (DMB) service.

The Digital Multimedia Broadcasting (DMB) standard enables video broadcasting by transmitting MPEG-4 (Moving Picture Experts Group-4) data to the Digital Audio Broadcasting (DAB) standard and the Eureka-147 broadcasting standard. In addition to MPEG-4 data, other types of data transmission, such as TPEG and BWS, are possible, so that the DMB standard can support multimedia broadcasting of mobile reception. This can be applied to existing mobile devices such as PDAs (Personal Digital Assistants), portable DVDs, and mobile phones, as well as the DMB receiver itself.

On the other hand, existing users could only unilaterally receive video, audio, and data from broadcasters and intermediaries. However, when using digital multimedia broadcasting, various interactive services may be provided between a user and an operator due to its characteristics. To this end, various text information for an interactive service related to video or audio broadcasting should be provided to the user.

For example, a home shopping order reception center can send a phone number to a user watching a home shopping broadcast so that the user can immediately place an order phone call or an account number for online payment. To send a.

However, since the terrestrial DMB standard itself is being implemented for the first time in Korea, there is no technology that enables interactive services in connection with digital multimedia broadcasting. Therefore, it would be necessary to develop a method for easily processing text back-links for interactive services in digital multimedia broadcasting services.

Accordingly, the present invention has been proposed to meet the above necessity, and enables back-link processing of text for an interactive service using a private section of the MPEG-2 transport stream standard, thereby providing an interactive service in a digital multimedia broadcasting service. The goal is to provide a way to make this happen.

In order to achieve the above object, the text back-link processing method using the MPEG-2 transport stream standard according to the present invention, the PID (Packet IDentification) for the video or audio of the broadcast program, the contents of the section is private use And setting the PID of the packet with the private section in the Program Map Table (PMT) and configuring the MPEG-2 Transport Stream (TS) with text information included in the private section. ; The DMB receiving apparatus which receives the MPEG-2 transport stream transmitted by the DMB transmitting apparatus finds a program allocation table (PAT) in the MPEG-2 transport stream, checks the corresponding PMT, and checks the corresponding PMT. Playing the corresponding video and audio with reference to the PID; The DMB receiving apparatus extracting text information included in the private section by referring to the PID of a packet including the private section when the PMT is marked to indicate that the contents of the section are for private use; And displaying, by the DMB receiving apparatus, the extracted text information on a display screen.

The indication that the contents of the section is for private use may be configured by setting the 'stream type' field to '0x05' among the fields constituting the PMT.

The PID of the packet with the private section may be configured to be set in an 'elementary PID' field among the fields constituting the PMT.

In the private section including the text, the 'table id' field may be set to any one of 0x40 to 0xFE, the 'private indicator' field is set to '1', and the 'private data' area may include text. .

The DMB receiving apparatus may be a mobile communication terminal capable of receiving digital multimedia broadcasting.

When the DMB receiver is a mobile communication terminal capable of making a call such as a mobile phone and receiving a digital multimedia broadcast, the user directly dials the telephone number displayed on the display screen through a user interface (UI) menu or a schedule button. It is preferable to configure so that it can hang.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Moving Picture Experts Group-2 (MPEG-2) is represented by three standards: MPEG-2 system, MPEG-2 video, and MPEG-2 audio. Stream) and Program Stream (PS). In addition, one program is composed of video information, audio information, and user data information. The MPEG-2 transport stream defined by the MPEG-2 system layer corresponds to a plurality of programs corresponding to a plurality of programs in one video, audio, and user data. Data information is time-division multiplexed.

Referring to FIG. 1, the DMB transmitter 11 multiplexes MPEG-2 transport packets together with PSI (Program Specific Information) to generate an MPEG-2 transport stream, and transmits the MPEG-2 transport stream to the DMB receiver 12. PSI is program specific information that enables the DMB receiver 12 to properly analyze video, audio, and user data information corresponding to a desired program when demultiplexing an MPEG-2 transport stream.

Most of these PSIs are in the form of sections. Representative sections include a program allocation table (PAT) and a program map table (PMT). One PMT exists in each program, and it is a section that summarizes PID (Packet IDentification) for transport stream packets containing video and audio streams of the program.

Referring to FIG. 2, a packet of an MPEG-2 transport stream (TS) has a fixed length of 188 bytes, and a plurality of PMTs exist in a transport stream because a plurality of programs are generally present in one transport stream. . Therefore, there is a need for a comprehensive section that connects the multiple programs being transmitted in the transport stream with the PID for each program's PMT, which is the PAT. At this time, since one program is represented by one program number, most items of the PAT are composed of information representing the relationship between the program number and the PMT PID.

3, an embodiment of back-linking text information in an MPEG-2 transport stream according to the present invention will be described.

First, the DMB transmission apparatus 11 performs a process for including text information in an MPEG-2 transport stream according to the present invention. That is, the PID for video and audio of a broadcast program is set in the PMT, and the PID of a packet having an indication and a private section indicating that the content of the section is for private use is set in the PMT. In addition, the private section includes the text information to be transmitted (S31).

Meanwhile, when receiving the MPEG-2 transport stream including the PMT and the private section set through step S31 (S32), the DMB receiving apparatus 12 first checks the PMT by finding the PAT in the MPEG-2 transport stream (S33). . Then, the DMB receiving apparatus 12 checks the PID of the video and audio for the corresponding program through this PMT (S34), and plays the video and audio (S35).

In addition, the DMB receiving apparatus 12 checks whether the PMT is marked to indicate that the contents of the section is for private use (S36), and if marked, refers to the PID of the packet having the private section in the PMT. Check the location of the section (S37). The DMB receiver 12 extracts text information included in the private section (S38), and displays the extracted text information on the display screen (S39).

That is, from the user's point of view, while watching a video or listening to audio through the display screen of the DMB receiver 12 used by the user, the user may see text related to the broadcast (eg, a phone number or an account number). do.

4 and 5, a method of setting the PID for the video and audio of the broadcast program to the PMT, a method for setting the PID of the packet with the indication and the private section indicating that the contents of the section is for private use, to the PMT, And an embodiment of including text information to be transmitted in a private section.

FIG. 4 shows the structure of a PMT, and is composed of various fields such as a 'table id' field in which '0x02' is described to identify the PMT. In this case, it is preferable that the display indicating that the contents of the section is for private use is performed by setting the 'stream type' field 41 among the fields constituting the PMT 40 to '0x05'.

In addition, the PID of the packet having the private section is preferably configured to be set in the 'elementary PID' field 42 of the fields constituting the PMT (40). That is, the PID of the packet with the private section is recorded in the 'elementary PID' field 42 of the PMT 40.

An embodiment of including text information in the private section 50 will be described with reference to FIG. 5.

First, the 'table_id' field 51 indicates a value indicating that this section belongs to a private table. In the present invention, the 'table_id' field 51 may optionally have a value of 0x40 to 0xFE.

In case of '0', 'section syntax indicator' field is followed by 'private section length' field followed by 'private data bytes' field, and in case of '1', extension type is followed.

The 'private indicator' field 52 indicates a bit that can be defined and used by the user without using its current definition, and is set to '1' in the present invention.

The 'private section length' field indicates the number of bytes remaining in the private section.

The 'private data bytes' field 53 is an area that can be defined and used by the user, and can record texts (for example, a phone number and an account number of a home shopping order reception center) to be transmitted to this area.

The 'table id extension' field indicates the area that can be defined and used by the user, and the 'version number' field indicates the value that is incremented by '1' when the information used in the private section changes. If the indicator 'field is' 1', 'version number' is applied to the current private section, and if '0', 'version number' is applied to the next private section.

In the private section, the first 'section number' field is 'Ox00' and this section number is incremented by '1', the 'last section number' field is the last section number, and the 'CRC_32' field is the CRC value. .

Meanwhile, the DMB receiver 12 operating as described above may be a mobile communication terminal having a function of receiving digital multimedia broadcasting. When the mobile communication terminal has a call function, more various applications are possible. As a mobile communication terminal having a call function, a mobile phone having a reception function of digital multimedia broadcasting is an example.

Referring to FIG. 6, the display screen of the mobile phone 60 receiving the MPEG-2 transport stream displays a phone number associated with the broadcast currently being viewed, and the user presses a schedule button such as a call button 61 or the like. The phone number can be dialed through a user interface (UI) menu that allows a user to select a phone number displayed on the display screen or displayed in the past to attempt a call.

Referring to FIG. 7, an example of a process to which the present invention is applied when watching a home shopping broadcast using a mobile phone having a DMB reception function will be described.

The DMB transmission apparatus 11 transmits a home shopping broadcast containing a phone number for ordering a product or service currently being broadcast, and the user watches the home shopping broadcast using the mobile phone 60. Then, the mobile phone 60 extracts the order phone number and displays it on the display screen, and the user can easily make an order call by pressing the call button 61 or attempting to call this phone number on a schedule menu.

The present invention is not limited to the above-described embodiments and can be variously modified and implemented by those skilled in the art without departing from the technical spirit of the present invention.

Using the present invention, it is possible to easily configure the text back-link in the mobile environment without large change of the DMB standard. Accordingly, since the functionality of the digital multimedia broadcasting (DMB) which is desired to enter the market early can be improved, the broadcast service provider can provide a high quality broadcasting service different from the existing broadcasting.

In particular, when applied to a mobile communication terminal such as a mobile phone, various interactive services related to broadcasting are possible. That is, the interactive service related to broadcasting can be easily performed through the text back-link, and the user's point of view has no effect on the operation of the mobile phone.

As a specific example, a user may watch a home shopping broadcast and immediately order a product or service being sold on the broadcast. In addition, services such as mobile banking, which can be settled immediately during home shopping broadcasting in connection with account numbers, will also be possible.

Claims (6)

A digital multimedia broadcasting (DMB) transmitter sets a PID (Packet IDentification) for a broadcast program, an indication that the contents of a section is for private use, a PID of a packet with a private section in a Program Map Table (PMT), and Constructing and transmitting an MPEG-2 Transport Stream (TS) with text information included in the section; The DMB receiver receives the transmitted MPEG-2 transport stream, finds a program allocation table (PAT) in the MPEG-2 transport stream, checks the corresponding PMT, and refers to the broadcast program by referring to the PID set in the PMT. Playing; The DMB receiving apparatus is included in the private section by referring to the PID of the packet having the private section when the PMT is marked to inform the PMT that the contents of the section are for private use in association with the step of playing the broadcast program or independently. Extracting text information; And And displaying the extracted text information on a display screen. The method of claim 1, And displaying the contents of the section for private use by setting the 'stream type' field to '0x05' among the fields constituting the PMT. The method of claim 1, PID of the packet with the private section is configured to set in the elementary PID field of the fields constituting the PMT text back-link processing method using the MPEG-2 transport stream standard. The method of claim 1, In the private section including the text, the 'table id' field is set to any one of 0x40 to 0xFE, the 'private indicator' field is set to '1', and the 'private data' area is configured to include the text. A text back-link processing method using the MPEG-2 transport stream standard. The method according to any one of claims 1 to 4, The DMB receiving apparatus is a text back-link processing method using the MPEG-2 transport stream standard, characterized in that the mobile communication terminal configured to receive digital multimedia broadcasting. The method of claim 5, wherein The mobile communication terminal uses a user interface (UI) menu or a schedule button to make a call to a phone number displayed on the display screen. Treatment method.

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