KR100854764B1 - Apparatus and Method for processing DMB data streams for interactive DMB service in mobile DMB Terminal - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a DMB data stream processing apparatus and method for bidirectional DMB service in a mobile wireless communication DMB terminal.

2. The technical problem to be solved by the invention

The present invention, in the mobile wireless communication DMB terminal that enables the two-way data service through the mobile wireless communication network while receiving DMB data broadcast, by processing the interface between the functionally separated mobile processor and the DMB multimedia processor in the form of callback (Callback) An object of the present invention is to provide an apparatus and a method for processing a DMB data stream for a DMB service in a mobile wireless communication DMB terminal, which can effectively provide a bidirectional DMB service.

3. Summary of Solution to Invention

The present invention provides a DMB data stream processing apparatus for a two-way DMB service in a mobile wireless communication DMB terminal, by using a DMB API library to control a DMB function or to request DMB data, and through a callback function. A mobile processor for receiving and processing a command execution result from a DMB multimedia processor; And extracting payload data by performing a corresponding DMB function according to the DMB function control command or by packet decoding a packet mode data stream according to the DMB data request command to configure MSC data group data. And the DMB multimedia processor for delivering the configured MSC data group data " ('command execution result') to the mobile processor using a callback function.

4. Important uses of the invention

The present invention is used in mobile wireless communication DMX terminal and the like.

Terrestrial DMB, T-DMB, Data Service, Terminal, Packet Mode, Callback, Interface

Description

Apparatus and Method for processing DMB data streams for interactive DMB service in mobile DMB Terminal in mobile wireless DMV terminal

1 is a configuration diagram of a mobile wireless communication terrestrial DMB terminal for a bidirectional terrestrial DMB service to which the present invention is applied;

2 is a configuration diagram of an apparatus for processing a DMV data stream for a bidirectional DMV service in a mobile wireless communication DMV terminal according to the present invention;

3A and 3B are flowcharts illustrating an embodiment of a packet decoding method in the packet processor of FIG. 2 according to the present invention.

* Explanation of symbols on the main parts of the drawing

101: DMB RF processing unit 102: DMB baseband processing unit

103: DMB multimedia processor 111: Wifi / CDMA data transmission and reception processing unit

112: mobile processor 26: DMB API library

27: callback processing unit 33: DMB task (Task)

331: DMB API analysis unit 332: DMB module control unit

333: callback calling unit 34: packet processing unit (packet decoder)

35: DMB module processing unit

The present invention relates to a DMB data stream processing apparatus and method for bidirectional DMB service in a mobile wireless communication DMB terminal, and more particularly, to a mobile wireless network capable of two-way data service through a mobile wireless communication network while receiving DMB data broadcasting. In the communication DMB terminal, the interface between the functionally separated mobile processor and the DMB multimedia processor in the form of a callback, thereby effectively providing the interactive DMB service. An apparatus and a method thereof are provided.

Terrestrial Digital Multimedia Broadcasting (DMB) aims to provide a multimedia service including CD-quality audio and high-quality video in a mobile environment. To this end, Terrestrial DMB uses MPEG-4 Advanced Video Coding (AVC) and MPEG-4 Bit Sliced Arithmetic Coding (BSAC) as video and audio coding standards, respectively, based on the Eureka-147 DAB standard. MPEG-2 system and MPEG-4 system are used, and COFDM transmission technology, RS (Reed Solomon) code, and convolutional interleaver are applied to improve reception performance in mobile environment.

In addition to audio and video, terrestrial DMB includes data broadcasting standards to provide various data services. A data service stream forms a subchannel in a packet mode in which data is grouped and packetized, and protocols such as multimedia object transfer (MOT) and transparent data channel (TDC) are used for service transmission. Use Based on this transport protocol, a data service application such as a broadcast web service (BWS), a slide show, etc. may be provided.

Therefore, in order to receive a data service, a packet decoder capable of processing stream data transmitted in a packet mode and a transport protocol decoder for analyzing a MOT or TDC operate according to each service. An application decoder is needed. In addition, in order to transmit and receive various additional data associated with a data service using a separate wireless communication channel in a mobile environment, a bidirectional data transmission / reception processing function using wireless communication should also be performed.

The present invention has been proposed to meet the above demands, and in the mobile wireless communication DMB terminal that enables two-way data service through a mobile wireless communication network while receiving DMB data broadcasting, a functionally separated mobile processor and a DMB multimedia processor It is an object of the present invention to provide an apparatus and a method for processing a DMV data stream for a bidirectional DMV service in a mobile wireless communication DMV terminal, which can effectively provide a bidirectional DMB service by processing an interface between them in a callback form.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to achieve the above object, the present invention provides a command for controlling a DMB function or requesting DMB data using a DMB API library in a DMB data stream processing apparatus for a bidirectional DMB service in a mobile wireless communication DMB terminal. A mobile processor for receiving and processing a command execution result from a DMB multimedia processor through a callback function; And extracting payload data by performing a corresponding DMB function according to the DMB function control command or by packet decoding a packet mode data stream according to the DMB data request command to configure MSC data group data. And the DMB multimedia processor for delivering the configured MSC data group data " ('command execution result') to the mobile processor using a callback function.

Meanwhile, the present invention provides a DMB data stream processing method in a DMB data stream processing apparatus having a DMB multimedia processor and a mobile processor for a bidirectional DMB service, wherein the mobile processor controls a DMB function using a DMB API library. A command step of making a command or requesting DMB data; The DMB multimedia processor performing a corresponding DMB function according to the DMB function control command or extracting payload data by packet decoding a packet mode data stream according to the DMB data request command to configure MSC data group data; ; Transmitting, by the DMB multimedia processor, a "command execution result or the configured MSC data group data" ('command execution result') to the mobile processor by using a callback function; And a DMB processing step in which the mobile processor receives and processes the command execution result from the DMB multimedia processor through a callback function.

The present invention is to configure a mobile wireless terrestrial DMB terminal for two-way terrestrial DMB data broadcasting by using (mounting) a DMB receiving chip, a DMB multimedia processor, and a WiFi or CDMA processing chip for mobile wireless communication. .

The functions related to the operation of the terrestrial DMB module and the video service stream processing and decoding functions are executed in the DMB multimedia processor 103. Regarding the data service, the DMB multimedia processor 103 performs packet decoding, and transmits the packet decoding to the transport protocol decoder (MOT or TDC) 25 implemented in the mobile processor 112 and the application decoder (for example, BWS, SLS). , A decoder for TPEG, etc.) to show the data service. At the same time, the mobile processor 112 may execute a function related to driving a WiFi (or CDMA) module to implement an interactive service related to the terrestrial DMB data service.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a mobile wireless communication terrestrial DMB terminal for a bidirectional terrestrial DMB service to which the present invention is applied.

In order to process data of a mobile radio communication terrestrial DMB terminal capable of receiving terrestrial DMB service, as shown in FIG. 1, when a terminal is configured with a multiprocessor such as a mobile processor 112 and a DMB multimedia processor 103. The data processing structure and method in FIG.

The terrestrial DMB related processing unit includes a DMB RF processing unit 101, a DMB baseband processing unit 102, a DMB multimedia processor 103, and the like, and a mobile wireless communication related processing unit includes a WiFi (or CDMA) data transmission and reception processing unit 111. ), A mobile processor 112 and the like.

Here, the WiFi (or CDMA) data transmission and reception processing unit 111 is a communication module for bidirectional data transmission and reception, and the mobile processor 112 is a main processor of the DMB terminal, and processes the bidirectional data and the DMB application program and the decoder module therefor. Responsible for execution The DMB baseband processor 102 receives and processes the DMB ensemble frame together with the DMB receiver under the control of the DMB multimedia processor 103, and the DMB multimedia processor 103 controls the DMB baseband processor 102. A processor that handles DMB function modules.

Meanwhile, in FIG. 1, the DMB RF processor 101 or the DMB baseband processor 102 may be independently operated by an external initial setting, and may not include a separate controller chip. In particular, since the DMB baseband processor 102 is mostly integrated in a multimedia processor, in order to perform terrestrial DMB-related functions in the mobile processor 112 of the terminal system, an interface with a RISC or DSP of the DMB multimedia processor 103 is performed. Should be possible. In this case, an independent operating system (OS) is used for the mobile processor 112 and the DMB multimedia processor 103, respectively.

FIG. 2 is a configuration diagram of a DMV data stream processing apparatus for a two-way DMV service in a mobile wireless communication DMV terminal according to the present invention. As illustrated in FIG. 2, the DMV data stream processing apparatus includes a mobile processor 112. And a DMB multimedia processor 103.

The present invention provides an interfacing method using a callback structure as an efficient data processing method between the mobile processor 112 and the DMB multimedia processor 103. 2 illustrates an embodiment using a serial peripheral interface (SPI) to interface between processors.

First, the mobile processor 112 will be described.

The mobile processor 112 is a main processor of a DMB terminal and is responsible for processing bidirectional data and executing a DMB application program and a decoder module therefor. That is, the mobile processor 112 performs a command (DMB function control command) for controlling the DMB function using the DMB API library or a command for requesting DMB data (DMB data request command), and the DMB multimedia processor through a callback function. It receives a command execution result from 103 and performs a function of processing. Hereinafter, each component thereof will be described.

The WiFi (or CDMA) driver 21 performs an interface with the WiFi (or CDMA) data transmission / reception processing unit 111, and the TCP / IP protocol stack 22 performs TCP / IP protocol processing. Perform.

DMB application (DMB browser) 23 refers to an integrated application, which allows a user to watch DMB broadcasts and use communication functions, and application decoder 24 is the transmitted content (broadcast website (BWS)). , Slide show (SLS), TPEG, etc.) to be adapted to each application, and the transport protocol decoder 25 is a decoder that decodes transport protocols such as MOT and TDC (Transparant Data Channel) of the DMB stream. to be.

The DMB API library 26 represents an API that enables the use of the DMB function module of the DMB multimedia processor 103.

The callback processor 27 processes a callback according to the DMB function of the DMB multimedia processor 103, and the SPI processor 28 is a module that processes serial peripheral interface (SPI) data. The driver 29 performs SPI interface processing.

Next, the DMB multimedia processor 103 will be described.

The DMB multimedia processor 103 is a processor that controls the DMB baseband processing unit 102 and processes the DMB function module. The DMB multimedia processor 103 is a corresponding DMB function according to a command API (DMB function control command or DMB data request command) of the mobile processor 112. Or extract the payload data by packet decoding the packet mode data stream to configure the MSC data group data (see FIGS. 3A and 3B), and the execution result (DMB function execution result or MSC data group data) of the command. The callback function is used to transfer the data to the mobile processor 112. Hereinafter, each component thereof will be described.

The SPI driver (Drvier) 31 performs SPI interface processing, and the SPI processing unit 32 is a module that processes serial peripheral interface (SPI) data.

The DMB task 33 includes a DMB API interpreter 331, a DMB module controller 332, and a callback caller 333, where the DMB API interpreter 331 uses a DMB API called by a DMB application. The DMB module control unit 332 controls the DMB module processing unit 35 according to the analysis result of the DMB API analysis unit 331. Then, the callback caller 333 calls the callback to the callback processor 27 according to the operation of the DMB module processor 35.

The packet processor 34 indicates a packet decoder as processing a packet mode stream to extract payload data.

The DMB module processing unit 35 collectively performs processing of each DMB module under the control of the DMB module control unit 332.

The DMB receiving processor 36 includes a tuner driver driver 361, a DMB ensemble demultiplexer 362, and a subchannel stream processor 363. Here, the tuner driver 361 provides an interface for controlling the tuner of the DMB broadcast receiver through the DMB baseband processor 102, and the DMB ensemble demultiplexer 362 demultiplexes the DMB frame. To separate the subchannel streams, and the subchannel stream processing unit 363 processes the subchannel streams.

The video service processor 37 is an audio decoder 371 that decodes and outputs audio data of a DMB service stream, and a video decoder 372 that decodes and outputs video data of a DMB service stream. Is done.

Hereinafter will be described in terms of interaction of each component described above.

The present invention defines a DMB API (Application Program Interface) for controlling the DMB function performed by the DMB multimedia processor 103 in the terminal and transmitting and receiving data, and implements it in the form of a callback function. Here, the callback function is a function called by the callback processing unit 27, and is created by the DMB application producer.

When the DMB application (application) 23 initially opens the device or requests the reception of data, the DMB application (application) 23 calls the callback processing unit 27 according to the corresponding processing function. Register the function.

Afterwards, when the application issues a command using the DMB API library 26, the execution result of this command is called by the callback function in which the callback processing unit 27 is registered according to the signal of the callback calling unit 333, It is passed to the application. In this case, the callback function should be written to deliver and end the message and necessary information to the application, and there should be no call to the DMB API within the callback function.

All DMB APIs should return a value of "0" if the command is well "received" and a non-zero value if the command fails. Returning "0" here does not mean that the command has been 'run' well, and the actual result of the command is passed through the callback function.

That is, when the DMB API is called to control the DMB function and request data, the mobile processor 112 may execute another application without waiting for the result to be returned until the corresponding command is executed, and the execution of the requested command. When the result is passed by calling a callback function, it has a processing structure that can then perform the operation.

The data processing structure as described above is a data processing structure that enables processing of data transmitted and received in both directions through a wireless communication channel while processing DMB broadcast data.

3A and 3B are flowcharts illustrating an embodiment of a packet decoding method in the packet processing unit (packet decoder) of FIG. 2 according to the present invention, and detects a packet of a specific packet address in a stream of a packet mode and detects the packet. Payload data is extracted from the packets, and data group data is configured.

The packet decoder algorithm as shown in FIGS. 3A and 3B is implemented in the packet processing unit 34 of the DMB multimedia processor 103 and executed through the DMB API, and calls the registered callback function and returns the result to the mobile processor 112. ), The mobile processor 112 must process data in the form of a continuous stream so that it can perform its functions more efficiently.

That is, in the present invention, the packet processing unit (packet decoder) 34 is implemented in the DMB multimedia processor 103, the DMB API is defined for use thereof, and the execution result by the API defined in this manner is a mobile processor ( 112). As a result, the mobile processor 112 does not perform an unnecessary operation of processing stream data that is continuously introduced, and performs a transport protocol decoder function only when specific data group data required by an application is extracted. Enable the mobile processor 112 to be used efficiently.

Hereinafter, FIGS. 3A and 3B will be described in detail.

After initializing the main service channel (MSC) data group buffer (300), the packet processor 34 detects a packet of an address designated by the application from the corresponding packet mode subchannel stream (301), and stops packet decoding in the process. If there is a request (302), it ends.

On the other hand, if there is no packet decoding stop request, CRC check is performed on the detected packet (303), if there is an error, the CRC error notification callback function is called (304) and the feedback is returned to "300". Check whether the first flag ("1") of the (305).

If the first flag is "1", it checks whether the MSC data group buffer is in the initialization state (306). If it is not in the initialization state, the data configuration error notification callback function is called (307). ", And adds the packet data to the MSC data group buffer if it is in the initialization state (308). If the first flag is not "1" (305), the continuity index of the index is checked (311), and if the packet is a continuous packet, packet data is added to the MSC data group buffer (308). If it is a packet, the packet discontinuous error notification callback function is called 312, and then fed back to " 300 ".

The step 308 of adding packet data to the MSC data group buffer as described above is repeatedly performed until the last flag of the packet header becomes "1" (309).

When all the specific data group data packets required by the application are extracted and stored, the callback function for delivering the configured MSC data group is called (310).

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

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 as described above, by implementing a data processing structure between processors in the form of a callback to increase the utilization of the mobile process, there is an effect that enables efficient bidirectional related process processing.

In addition, the present invention can reduce the data processing burden of the mobile processor by distributing the functions to the packet decoder (packet processing unit) in the DMB multimedia processor, thereby enabling other processes to be performed.

Claims (12)

A DMX data stream processing apparatus for a bidirectional DMV service in a mobile wireless communication DMV terminal, A mobile processor for making a command to control a DMB function or requesting DMB data using a DMB API library, and receiving and processing a command execution result from a DMB multimedia processor through a callback function; And Perform the DMB function according to the DMB function control command or extract the payload data by packet decoding the packet mode data stream according to the DMB data request command to configure MSC data group data. The DMB multimedia processor for delivering the configured MSC data group data " ('command execution result') to the mobile processor using a callback function. DMX data stream processing apparatus comprising a. The method of claim 1, The DMB multimedia processor, Through a task capable of performing a DMB function, the DMB function control command or the DMB data request command is interpreted and the corresponding DMB function module is executed according to the interpreted command, or the packet mode data stream is packet decoded. And an MSC data group data for extracting payload data. The method of claim 1, The DMB multimedia processor, And detecting a packet having an address corresponding to the DMB data request command in the packet mode data stream, and extracting payload data from the detected packet to configure the MSC data group data. DMX data stream processing apparatus. The method of claim 1, The DMB multimedia processor, And an error notification callback function is called to notify the mobile processor when one or more errors of a CRC error, a data configuration error, or a packet discontinuity error are detected during packet decoding. The method of claim 1, The mobile processor, After the command for controlling the DMB function or the command for requesting the DMB data using the DMB API library, another application is executed. When the command execution result is transmitted from the DMB multimedia processor through a callback function, the original application is executed. And a DMX data stream processing device, characterized in that the operation of the application is continuously performed. The method of claim 1, The mobile processor, DMX data stream processing apparatus characterized by providing a data service corresponding to the MSC data group data by performing the transmission protocol decoding and application decoding on the MSC data group data received through the callback function from the DMB multimedia processor. The method of claim 1, The mobile processor, Register the callback function corresponding to the function of the command in the callback processing unit according to the command of the application and commands using the DMB API library, and the corresponding callback registered in the callback processing unit according to the signal of the callback calling unit of the DMB multimedia processor. And transmitting a command execution result to the application by calling a function. In the DMB data stream processing method in a DMB data stream processing apparatus having a DMB multimedia processor and a mobile processor for a bidirectional DMB service, An instruction step for the mobile processor to command a DMB function or request DMB data using a DMB API library; The DMB multimedia processor performing a corresponding DMB function according to the DMB function control command or extracting payload data by packet decoding a packet mode data stream according to the DMB data request command to configure MSC data group data; ; Transmitting, by the DMB multimedia processor, a "command execution result or the configured MSC data group data" ('command execution result') to the mobile processor by using a callback function; And A DMB processing step of receiving and processing the command execution result from the DMB multimedia processor by the mobile processor through a callback function; DMB data stream processing method comprising a. The method of claim 8, The command execution step, The DMB multimedia processor interprets the DMB function control command or the DMB data request command through a task capable of performing a DMB function and executes the corresponding DMB function module according to the interpreted command, or executes the packet mode. A DMX data stream processing method characterized by extracting payload data by packet decoding a data stream. The method of claim 8, The packet decoding process in the command execution step, And detecting a packet having an address corresponding to the DMB data request command in the packet mode data stream, and extracting payload data from the detected packet to configure the MSC data group data. DMB data stream processing method. The method of claim 10, The command execution step, And if one or more errors of a CRC error, a data configuration error, or a packet discontinuity error are identified during the packet decoding process, calling the corresponding error notification callback function to notify the mobile processor. The method of claim 8, The DMB processing step, DMX data characterized in that the mobile processor performs transport protocol decoding and application decoding on the MSC data group data received through the callback function from the DMB multimedia processor to provide a data service corresponding to the MSC data group data. How to handle streams.

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