• Journal of Korea Multimedia Society
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• v.9 no.12
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• pp.1617-1627
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• 2006

The concept of middleware for digital TV receivers is not new one. Using middleware for digital TV development has a number of advantages. It makes it easier for manufacturers to hide differences in the underlying hardware. It also offers a standard platform for application developers. Digital TV middleware enables set-top boxes(STBs) to run video, audio, and applications. The main concern of digital TV middleware is now to reduce its memory usage because most STBs in the market are small footprint. In this paper, we propose several ideas about how to reduce the required memory size on the runtime area of DTV middleware using a new native process technology. Our proposed system has two components; the Efficient Native Process Module, and Enhanced Native Interface APIs for concurrent native modules. With our approach, the required memory reduced from 50% up to 75% compared with the traditional approach. It can be suitable for low end STBs of very low hardware limitation.

• Journal of Broadcast Engineering
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• v.7 no.3
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• pp.277-284
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• 2002

In recent years, data broadcasting kas been drawing muck attention with glowing importance. In this paper, we implement a DASE middleware which is crucial for the data-ready DTV settop box. The software has been ported to a prototype system and tested with real time broadcasting streams.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.1
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• pp.249-256
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• 2011

Since various applications is converged in digital televisions, playing game on DTV will be available in the immediate future. Game programming of DTV is more difficult than that of PC in a viewpoint of game development. Since TV use very simple remote controller as user interface, mapping type, choice type, and one-button type are used among mobile game user interfaces. In addition, we suggest to use text class, numeral class, bitmap class, and shape class of DTV OSD middleware which is proven software, instead of developing new DTV-oriented game engine. The proposed interfaces can be applied in various game situations and allow intuitive and fast operations. By using OSD middleware, game actions can be subdivided into state structures, OSD objects can be used as game objects, and events and actions of remote controller keys are easily defined.

• The KIPS Transactions:PartC
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• v.17C no.1
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• pp.89-98
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• 2010

In current digital broadcasting systems, GEM(Globally Executable MHP)-based middlewares such as MHP(Multimedia Home Platform), OCAP(OpenCable Application Platform), ACAP(Advanced Common Application Platform) are the norm. Despite much of the common characteristics shared, such as MPEG-2 and DSM-CC(Digital Storage Media-Command and Control) protocols, the information and data structures they need are slightly different, which results in incompatibility issues. In this paper, in line with an effort to develop an integrated DTV middleware, we propose a general-purpose, reconfigurable DSM-CC architecture for supporting various standard GEM-based middlewares without code modifications. First, we identify DSM-CC components that are common and thus can be shared by all GEM-based middlewares. Next, the system is provided with middleware-specific information and data structures in the form of XML. Since the XML information can be parsed dynamically at run time, it can be interchanged either statically or dynamically for a specific target middleware. As for the performance issues, the response time and usage frequency of DSM-CC module highly contribute to the performance of STB(Set-Top-Box). In this paper, we also propose an efficient application cache management strategy and evaluate its performance. The performance result has shown that the cache strategy reflecting user preferences greatly helps to reduce response time for executing application.

• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.169-171
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• 2007

This paper presents the development of DVB-T reception module including the RF-tuner. For the development of the reception module, we design the board using the ALi M3330 MPEG-2 decoder processor and implement its device driver. Simple On-Screen Display (OSD) applications are also designed on the middleware of ALi M3330 MPEG-2 decoder processor. To evaluate the performance of reception module, we test the decoding operations using the input TS stream generated by DVB-T stream generator and confirm the correctness of its functional operations.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.52-54
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• 2003

IEEE1394는 디지털 멀티미디어 데이터의 전송의 실시간성이 보장되고 빠른 전송속도와 동적인 네트웍 재구성이 가능한 직렬 인터페이스로 현재 대표적인 흠 네트웍 프로토콜로 인식되고 있다. IEEE1394를 기반 프로토콜로 사용하는 흠 네트웍 미들웨어인 HAVi는 디지털 AV기기간의 상호운용성을 보장하는 미들웨어이다. HAVi의 구현은 어떠한 언어를 사용하든 관계가 없으나, 미들웨어의 구조상 HAVi 응용(Havlet)의 다운로드와 실행, 메시지의 전송방식 등에서 Java언어로의 구현이 가장 적절하며, HAVi에서는 또한 응용 개발을 위한 미들웨어의 Java API와 DTV와 셋탑박스 등에 탑재될 때 사용할 수 있는 HAVi L2 ui를 제공한다. 본 논문은 HAVi 미들웨어를 Java언어로 구현함에 있어 필요한 IEEE1394의 Java API와 효과적인 데이터의 전달을 위한 콜백기법과 005의 보장을 위한 버퍼링 기법을 제안한다.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.1 no.1
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• pp.6-25
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• 2002

In this paper, we have implemented UPnP Devices which emulate a Control Point, a Light Controller, and a Digital TV. The Control Point has been developed on Linux host system by using C language. The UPnP Devices emulating the Digital TV and Light Controller are running on embedded linux developer board. For the development of UPnP Devices, UPnP SDK API Vl.04 made by Intel Co. Ltd. has been ported on Assabet Linux Reference board to implement the UPnP protocol. After we analyze and design some services of Digital TV device, we have applied UPnP Device program to those devices. UPnP SDK vl .04 consists of APIs which support HTTP, SSDP, SOAP, GENA and XML DOM Level-1 that are cores of UPnP protocol. The C program written for the UPnP Control Point has been compiled and executed on Linux-based PC. The embedded system running on Embedded Linux OS has been connected all together through Ethernet which allows IP-based communications. Under this environment, the UPnP programs are being executed on each device. Control Point, when in operational mode, discovers UPnP Devices on the network and displays the device list on the consol. By selecting one of the functionalities of the device services that are displayed on the Control Point, the controllability has been accomplished. The experiment that we performed in this thesis have revealed that the Control Point and UPnP Devices have supported the protocols including SSDP, SOAP, GENA, and DHCP.