KR100655380B1 - Digital convergence platform based on mpeg-21 multimedia framework - Google Patents

Abstract

A digital convergence platform based on an MPEG(Moving Picture Experts Group)-21 multimedia framework is provided to realize protection and transaction of digital contents by implementing the digital convergence platform converging broadcasting, communication, and multimedia based on a digital platform technology, and applying the MPEG-21 multimedia framework to the digital convergence platform. A peripheral interface(100) interfaces data with a peripheral. A network device(200) interfaces the data with the WAN(Wireless Area Network) and the LAN(Local Area Network). A memory(300) stores an OS(Operating System), middleware, and an application program. A CPU(400) executes a platform OS in the memory, controls the peripheral interface and the network device, provides an environment to operate multimedia framework software, and performs a streaming service. A DSP(Digital Signal Processor)(500) is operated through a codec downloaded from the CPU, temporarily stores and outputs A/V(Audio/Video) data through an A/V output port if the A/V data is received from the CPU, and transfers the A/V data to the CPU if the A/V data is received from an A/V input port.

Description

DIGITAL CONVERGENCE PLATFORM BASED ON MPEG-21 MULTIMEDIA FRAMEWORK}

1 is a functional block diagram showing the configuration of a digital convergence platform based on the MPEG-21 multimedia framework according to an embodiment of the present invention;

FIG. 2 is a reference diagram showing a hardware implementation result for a digital convergence platform based on the MPEG-21 multimedia framework according to FIG. 1;

3 is a software module configuration diagram of a digital convergence platform based on the MPEG-21 multimedia framework according to FIG. 1.

<Explanation of symbols for the main parts of the drawings>

100: peripheral device interface 200: network device

300: memory 400: CPU

500: DSP 510: video buffer

520: Video input / output port 530: Multi-codec

540: stream buffer 550: audio input / output port

The present invention relates to a digital convergence platform based on the MPEG-21 multimedia framework. More specifically, a digital convergence of a new concept in which broadcasting, communication, and multimedia are converged based on the digital platform technology. The present invention relates to a digital convergence platform based on the MPEG-21 multimedia framework that implements the platform and applies the MPEG-21 multimedia framework on the platform to enable digital content protection and transaction.

In general, the digital electronics industry is growing rapidly with the development of hardware and software technologies and the spread of the Internet. In addition, platform technology and e-commerce technology have become the rudder leading the electronics industry with the spread of high-performance PCs and the emergence of broadband networks and digital broadcasting.

Recently, as the integration between home appliances is being made, research on digital convergence is rapidly progressing. Digital convergence is a device that can be miniaturized and reduced in price by sharing a hardware platform to enable a complex function of electronic devices each having a single function. Collectively, the technology that can achieve this.

This platform technology is a hybrid platform that combines digital and analog processing in a single function hardware with analog processing, and nowadays, most of the platforms that digitally process almost all parts are made. Digital platforms are playing a key role in representative electronics industries such as broadcasting, telecommunications and consumer electronics.

In addition, electronic commerce technology provides an environment in which digital items can be easily traded and sold in various ways through the Internet. Recently, electronic devices have emerged as convergence products that combine various functions based on high performance. Moreover, unlike existing electronic products such as mobile phones, PCs, TVs, sound, and home appliances, which have supported a limited range of services, it integrates different area technologies, thereby providing new types of functions and complex service functions. A new concept product is developed.

Such digital convergence products require advanced technologies such as interoperable data processing technology that can handle broadcasting and multimedia contents, protocol technology for interface of wired and wireless networks, and hardware design technology.

On the other hand, the conventional digital convergence platforms developed by this situation do not integrate various functions such as digital broadcast reception, multimedia service, networking and e-commerce functions, and in particular, the MPEG-21 multimedia framework is applied on the platform. There was a problem in that it is impossible to provide higher quality services to consumers because it is impossible to protect and trade digital content.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to implement a digital convergence platform of a new concept in which broadcasting, communication, and multimedia are converged based on digital platform technology, and MPEG- It is to provide a digital convergence platform based on MPEG-21 multimedia framework to apply 21 multimedia framework on platform to enable digital contents protection and transaction.

In order to achieve the above object, a digital convergence platform based on the present invention MPEG-21 multimedia framework, the peripheral interface unit for performing a data interface function with the peripheral device;

A network device unit performing a data interface function between a WAN network and a LAN network;

Memory in which the operating system, middleware and applications are stored;

A CPU that executes a platform operating system on the memory, controls the peripheral interface unit and the network device unit, provides a environment in which the multimedia framework software can operate, and performs a streaming service; And

It operates by downloading codec from the CPU, and when video and audio data is received from the CPU, it is temporarily stored and transmitted through the video / audio output port, and video and audio data is input through the video / audio input port. It is characterized in that the DSP is configured to receive and transfer it to the CPU.

Hereinafter, a digital convergence platform based on the MPEG-21 multimedia framework according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The digital convergence platform is a combination of various functions such as digital broadcasting reception, multimedia service, networking, and e-commerce functions. It requires a high-performance processor to implement these functions, and the operating system is installed to enable multithreading between each functional module. Should be.

In addition, the interface structure between the software modules is determined based on the priority of functions, the processing performance of the processor, the memory occupancy, etc. In the case of digital broadcasting, the MPEG-2 transport stream is received and processed. Compressed streams with a transmission rate of about 20-40 Mbps can be used with General Purpose processors above 1.5 GHz for real-time decoding. On the other hand, processing streams such as MPEG-4 and WMV for streaming other than MPEG-2 puts a lot of burden on the processor in the case of software decoding.

Accordingly, the present invention proposes a digital convergence platform based on the MPEG-21 multimedia framework according to an embodiment of the present invention as shown in FIG. 1. 1 is a functional block diagram of a digital convergence platform based on the MPEG-21 multimedia framework according to an embodiment of the present invention.

The digital convergence platform based on the MPEG-21 multimedia framework according to an embodiment of the present invention includes a peripheral device interface unit 100, a network device unit 200, a memory 300, and a central process unit (CPU) 400. And a digital signal processor (DSP) 500.

In this case, the peripheral device interface unit 100 performs a data interface function with a peripheral device, and is provided with an E-IDE to enable a storage device connection, and has an IEEE 1394 port so that the digital A / V device is connected to the peripheral device. Can be connected.

In addition, the network device unit 200 performs a data interface function between a wide area network (WAN) network and a local area network (LAN) network to enable a home server function, and a WAN port and a LAN port are connected to each other. The memory 300 stores an operating system, middleware, and application programs.

The CPU 400 executes a platform operating system on the memory 300, controls the peripheral interface unit 100 and the network device unit 200, and operates an multimedia framework software. At the same time, it provides a streaming service.

At this time, the digital convergence platform of the present invention requires a lot of data processing and operations to perform digital broadcasting and multimedia playback functions, it is difficult to process high-quality data with a single CPU (400) used in the embedded platform. Therefore, as the DSP 500 processes the multimedia data with the coprocessor, the CPU 400 can operate with a minimum load.

In addition, since the DSP 500 operates through codec download, various types of codecs can be freely used. When the video and audio data are received from the CPU 400, the DSP 500 temporarily stores the codec through the video / audio output port. On the other hand, when the video and audio data is received through the video / audio input port, it transmits the data to the CPU 400.

As illustrated in FIG. 1, the DSP 500 includes a video buffer 510 for temporarily storing video data, and a video input / output port 520 connected to the video buffer 510 to input / output video data. ), A multi-codec 530 that performs a multi-codec function through downloading a codec from the CPU 400, a stream buffer 540 for temporarily storing audio data, and a stream buffer 540. The audio input / output port 550 is configured to input / output audio data.

At this time, Figure 2 is a diagram showing the hardware implementation results for the digital convergence platform based on the MPEG-21 multimedia framework according to the present invention, the CPU 400 is implemented with a 400Mhz Xscal RISC CPU having an ARM core, The DSP 500 is implemented as a TI DSP having a clock speed of 600 MHz, and the CPU 400 and the DSP 500 are connected through a PCI bus, and the current performance is possible to receive SD-class digital broadcasts and web services. And streaming services are available.

Next, a software module configuration of the digital convergence platform based on the MPEG-21 multimedia framework according to an embodiment of the present invention having the above configuration will be described with reference to FIG. 3.

The digital convergence platform of the present invention provides a multimedia service based on the Linux operating system, and is composed of MPEG-21 framework software capable of electronic commerce. The software structure may be divided into an operating system (Linux OS) 10, a middle ware 20, and an application program 30 as shown in FIG. 3.

At this time, the embedded Linux operating system 10 plays an important role in scheduling high-level programs and efficiently using hardware resources. The DSP H / W Driver Module and network control for digital convergence It implements a module (Network Interface Module), home networking, and home appliance control.

Meanwhile, as shown in FIG. 3, the middleware 20 part is composed of a library for broadcasting, a multimedia framework, and multimedia processing. In this case, a broadcasting convergence middleware module (DVB-T, S, C) )) Consists of an integrated module that can receive all terrestrial, satellite and cable.

In addition, the MPEG-21 Framework Engines (MPEG-21 Framework Engines) are configured using a metadata format to enable the trading of digital media, and provide basic contents for protecting rights including copyright and license information. In the present invention, a tool for distributed transactions and copyright protection of multimedia is implemented on the digital convergence platform. In this case, the implemented tools include an engine for processing DID, a multimedia format standard, an REL related to copyright, an IPMP module, and an encryption and decryption module for protecting media resources.

In addition, the middleware 20 includes a graphic control module for outputting information on a screen when an application program is executed, and includes a server and a client module for streaming.

Meanwhile, as shown in FIG. 3, the application program 30 controls various middlewares 20 and is manufactured in consideration of user convenience, and the multimedia player is implemented to enable file or VOD service.

In this case, a multimedia player downloads and uses a software type codec to the DSP 500 to use various media file formats. In addition, even when the digital broadcast is received, the actual stream data is reproduced using the codec downloaded to the DSP 500. As such, the DSP 500 can process the software by separating the codec, which is a structure that can flexibly cope with a codec having a different compression format.

In addition, the digital broadcast reception selects three input sources such as terrestrial, cable, and satellite to separate broadcast data and stream in the broadcast middleware, so that the stream is processed by the DSP 500, and the broadcast data is processed by the CPU 400. Will be processed. Content packaged with the MPEG-21 multimedia framework is called a digital item.

At this time, the digital item browser is an application that can purchase digital items and serves to display and purchase digital items available on the network. The connected internal middleware has a DID engine that parses digital items, a REL parser, and a media decryption module, which decrypts the content information and rights information of the digital item and decrypts the encrypted resources so that they can be reproduced.

In addition, a resource maker and a digital item generator are programs for creating a digital item and updating a content list to be sold.

At this time, the resource maker converts the media file in the form of raw data into a compressed stream through an encoding process. On the other hand, license authentication and payment (License and Payment Manager) is done through the manager program, it is possible to play digital items by passing the key value to the encryption module inside the authentication and payment.

In addition, Home Automation is a program for controlling homes, which controls lights, door locks, and the like through a serial port on a digital convergence platform. As described above, the digital convergence platform operates software modules for various functions. In the present invention, an interface and a main program for controlling such modules are manufactured.

Although the present invention has been described in more detail with reference to the embodiments, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

As described above, the digital convergence platform based on the MPEG-21 multimedia framework according to the present invention implements a new concept of digital convergence platform in which broadcasting, communication, and multimedia are converged based on the digital platform technology, and the MPEG-21 multimedia By applying the framework on the platform to enable digital content protection and transactions, there is an outstanding effect of providing higher quality services to consumers.

Claims (9)

A peripheral device interface unit 100 performing a data interface function with the peripheral device; A network device unit 200 performing a data interface function between the WAN network and the LAN network; A memory 300 in which an operating system, middleware and applications are stored; The platform operating system on the memory 300 is executed, the peripheral device interface unit 100 and the network device unit 200 are controlled, and the multimedia framework software can be operated and the streaming service is performed at the same time. CPU 400; And It operates by downloading the codec from the CPU 400. When receiving the video and audio data from the CPU 400, the video is stored for a while and transmitted through the video / audio output port, and through the video / audio input port. Digital convergence platform based on the MPEG-21 multimedia framework, characterized in that consisting of a DSP (500) for processing the transmission of the video and audio data to the CPU (400). The method of claim 1, The peripheral device interface unit 100 is provided with an E-IDE to enable a storage device connection, and has an IEEE 1394 port, so that the digital convergence based on the MPEG-21 multimedia framework can be connected to a digital A / V device. platform. The method of claim 1, The network device unit 200, the digital convergence platform based on the MPEG-21 multimedia framework, characterized in that the WAN port and LAN port is connected to enable the home server function. The method of claim 1, The CPU 400 is implemented as a 400 MHz Xscal RISC CPU having an ARM core, and the DSP 500 is implemented as a TI DSP having a clock speed of 600 MHz, wherein the CPU 400 and the DSP 500 are PCI buses. Digital convergence platform based on the MPEG-21 multimedia framework characterized in that connected via. The method of claim 1, The DSP 500 includes a video buffer 510 for temporarily storing video data; A video input / output port 520 connected to the video buffer 510 for inputting / outputting video data; A multi-codec 530 performing a multi-codec function by downloading a codec from the CPU 400; A stream buffer 540 for temporarily storing audio data; And A digital convergence platform based on the MPEG-21 multimedia framework, characterized in that it is connected to the stream buffer (540), the audio input / output port (550) for inputting and outputting audio data. The method of claim 1, The software module system of the device includes: an operating system (10) that plays an important role in scheduling higher programs and efficiently using hardware resources; A middleware 20 consisting of a broadcasting and multimedia framework and libraries for multimedia processing; And Digital convergence platform based on the MPEG-21 multimedia framework, characterized in that composed of an application program (30) produced to control the various middleware. The method of claim 6, The embedded Linux operating system (10) is a digital convergence platform based on the MPEG-21 multimedia framework, characterized in that it comprises a module for digital convergence, such as DSP communication module and network control module, home networking, home appliance control. The method of claim 6, The middleware 20 includes: a broadcast convergence middleware module that is an integrated module capable of receiving all terrestrial waves, satellites, and cables; An MPEG-21 multimedia framework engine configured using a metadata format to enable digital media transactions, and providing basic contents for protecting rights including copyright and license information; A graphics module for outputting information on a screen when executing an application program; And Digital convergence platform based on the MPEG-21 multimedia framework, comprising a server and a client module for streaming. The method of claim 6, The application program 30, a multimedia player implemented to enable a file or VOD service; A digital item browser for displaying and purchasing digital items available on a network as an application for purchasing digital items; A resource maker and a digital item generator for creating a digital item and updating the content list to enable the sale of the digital item; A license authentication and payment manager for performing license authentication and payment functions; And Digital convergence platform based on the MPEG-21 multimedia framework comprising a home auto application that controls various electronic products in the home.

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