• Title/Summary/Keyword: decoding engine

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X-File Viewer on a Mobile Platform (모바일 플랫폼상의 X-File Viewer)

  • Ha, Kyeoung-Ju
    • Journal of Korea Society of Industrial Information Systems
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    • v.15 no.4
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    • pp.61-70
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    • 2010
  • In this paper, we propose a mobile document viewer which is executable on a variety of mobile platforms. The proposed viewer is designed with file decoding engine and independent module which are adopted with os independent. The proposed viewer can be used as a basis of document editing tool by analyzing the characteristics of the document file.

Implementation of Integrated Receiver for Terrestrial/Cable/Satellite HD Broadcasting Services (유럽형 지상파/케이블/위성 멀티모드 HD 방송 수신이 가능한 통합 수신기 구현)

  • Lee, Youn-Sung;Kwon, Ki Won;Kim, Dong Ku
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.40 no.11
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    • pp.2113-2120
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    • 2015
  • This paper presents an integrated receiver to support multimode broadcasting standards such as DVB-T2, DVB-C2, and DVB-S2 in a single platform. The integrated receiver consists of a tuner block, a receiver engine, a frame processor, and an A/V decoder. The receiver engine includes a channel decoding engine and a demodulation engine to perform OFDM and APSK demodulations. The frame processor performs deinterleaving and BB frame decoding functions. The demodulator engine and the frame processor are implemented in two FPGA devices and DSP-based embedded software, respectively. To verify the functionality of the integrated receiver, it is tested in the laboratory. Commercial PC-based modulators are used to generate the DVB-T2, DVB-C2, and DVB-S2 modulated signals. The integrated receiver was tested under various operation modes as specified in the standards such as DVB-T2, DVB-C2, and DVB-S2 and showed successful operation in all the scenarios tested.

Implementation of TV-Anytime Compliant STB for Personalized TV Services

  • Lee Hee Kyung;Yang Seung Jun;Kim Jae Gon;Hong Jin Woo
    • Proceedings of the IEEK Conference
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    • 2004.08c
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    • pp.576-580
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    • 2004
  • In this paper, we present a design and implementation of a TV-Anytime compliant STB to provide personalized content consumption according to user preferences and various terminal/network conditions. This paper mainly details with a metadata engine which consists of meta data de-multiplexing, metadata decoding, and metadata-based content browsing. For personalized content consumption, the proposed metadata engine provides the following key functionalities: advanced EPG, non-linear segment navigation wirh Tables-of-Content and/or event-based summary, automatic recommendation of user-preferred programs, and etc. The implemented STB employing the metadata engine is successfully tested with a set of service scenarios in an end-to-end broadcasting test-bed.

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Incorporation of IMM-based Feature Compensation and Uncertainty Decoding (IMM 기반 특징 보상 기법과 불확실성 디코딩의 결합)

  • Kang, Shin-Jae;Han, Chang-Woo;Kwon, Ki-Soo;Kim, Nam-Soo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37 no.6C
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    • pp.492-496
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    • 2012
  • This paper presents a decoding technique for speech recognition using uncertainty information from feature compensation method to improve the speech recognition performance in the low SNR condition. Traditional feature compensation algorithms have difficulty in estimating clean feature parameters in adverse environment. Those algorithms focus on the point estimation of desired features. The point estimation of feature compensation method degrades speech recognition performance when incorrectly estimated features enter into the decoder of speech recognition. In this paper, we apply the uncertainty information from well-known feature compensation method, such as IMM, to the recognition engine. Applied technique shows better performance in the Aurora-2 DB.

Subdivided Facial Muscle Modeling based on MPEG-4 EAP (MPEG-4 FAP 기반 세분화된 얼굴 근육 모델 구현)

  • 이인서;박운기;전병우
    • Proceedings of the IEEK Conference
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    • 2000.09a
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    • pp.631-634
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    • 2000
  • In this paper, we propose a method for implementing a system for decoding the parameter data based on Facial Animation Parameter (FAP) developed by MPEG-4 Synthetic/Natural Hybrid Coding (SNHC) subcommittee. The data is displayed according to FAP with human mucle model animation engine. Proposed model has the basic properties of the human skin specified by be energy funtional for realistic facial animation.

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Implementation of H.264/SVC Decoder System based on C-Model Simulator (C-모델 시뮬레이터 기반 H.264/SVC 복호기 시스템 구현)

  • Cheong, Cha-Keon;Gil, Dae-Nam
    • The Journal of the Korea Contents Association
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    • v.9 no.2
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    • pp.27-35
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    • 2009
  • In this paper, we present result of embedded system based H.264/SVC decoder circuit design and system implementation. To deal with the standardized H.264/SVC functionalities, the presented SVC decoder system is consist of hardware engine design and software with ARM core processor. In order to improve the feasibility and applicability, and reduce the decoder complexity, the implemented system is constructed with only the consideration of IPPP structure scalability without using the full B-picture architecture. Finally, we will show the decoding image result using the designed H.264/SVC decoder system.

Parallel Processing Algorithm of JPEG2000 Using GPU (GPU를 이용한 JPEG2000 병렬 알고리즘)

  • Lee, Dong-Ha;Cho, Shi-Won;Lee, Dong-Wook
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.6
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    • pp.1075-1080
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    • 2008
  • Most modem computers or game consoles are well equipped with powerful graphics processing units(GPUs) to accelerate graphics operations. However, since the graphics engines in these GPUs are specially designed for graphics operations, we could not take advantage of their computing power for more general nongraphic operations. In this paper, we studied the GPUs graphics engine in order to accelerate the image processing capability. Specifically, we implemented a JPEC2000 decoding/encoding framework that involves both OpenMP and GPU. Initial experimental results show that significant speed-up can be achieved by utilizing the GPU power.

Implementation of HiMCS Platform (지능형 고품질 인터-네트워킹 미디어 에이전트 개발)

  • 장세진;이석필;송재종
    • Proceedings of the IEEK Conference
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    • 2003.11a
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    • pp.251-254
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    • 2003
  • 본 논문의 목표는 디지털방송과 인터넷의 융합에 따른 MPEG-2/4/7 방송 및 인터넷 콘텐츠을 비롯한 게임등과 같은 다양한 멀티미디어 서비스를 제공하기 위한 차세대 지능형 고품질 홈 엔터테인먼트 시스템 Platform 개발이다. 디지털 방송과 데이터방송 수신이 가능한 Set-Top Box기능, 수신된 방송의 저장 및 재생이 가능한 PDR 기능, MPEG-2 형식을 MPEG-4 형식으로 변환하는 Transcoding 기능, VOD 서비스를 제공하기 위한 Streaming 기능 등을 지원할 수 있는 시스템의 구조를 설계하였다. 이러한 지능형 고품질 서비스를 지원하기 일해 고성능 시스템이 필요하다. 시스템 제어를 위한 CPU 로는 PMC-Sierra사의 MIPS Architecture에 기반을 둔 RM5231 을 채택하고, MPEC-4 Decoding, BIFS Presentation Engine과 Streaming 서비스와 MPEC-7 Metadata Generator/Parser 을 위해 ARM Architecture에 기반을 둔 Intel80200 Processor 를 채택하였다. 또한, 디지털방송을 위한 MPEC-2 Decoder Chip 인 Teraloglc 사의 TL811 System Controller 와 TL851 Graphics& Display Processor 를 채택하였다. 개발된 시스템을 테스트하기 위하여 DVB-MHP Server와 MPEG-4 IP Streaming Server 를 구축하여 디지털 방송과 Streaming 서비스를 테스트하였다.

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A Study on the Data Compression Algorithm for Just-in-Time Rendering of Concentric Mosaic (동심원 모자이크의 실시간 표현을 위한 데이터 압축 알고리즘에 관한 연구)

  • Jee, Inn-Ho;Ahn, Hong-Yeoung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.10 no.1
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    • pp.91-96
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    • 2010
  • Concentric mosaics are made with arranging and summing of video frames by using common spacial standards. Compared with previous works on 3-D wavelet transform coding, we have made important design considerations to enable flexible partial decoding and bit-stream random access. A just-in-time(JIT) rendering engine of the compressed concentric mosaic is developed. However, computationally, it is still demanding to accomplish the real-time rendering. Only the contents for specific scene representation are need to be decoded by maintaining compressed data. Thus our proposed algorithm is able to render real concentric mosaic by using lifting scheme instead of wavelet transform.

Cross-layer Design of Packet Scheduling for Real-Time Multimedia Streaming (실시간 멀티미디어 스트리밍을 위한 계층 통합 패킷 스케줄링 기법)

  • Hong, Sung-Woo;Won, You-Jip
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.34 no.11B
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    • pp.1151-1168
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    • 2009
  • Improving packet loss does not necessarily coincide with the improvement in user perceivable QoS because each frame carries different degree of importance. We propose Significance-aware packet scheduling (SAPS) to maximize user perceivable QoS. SAPS carries out two fundamental issues of packet scheduling: "What to transmit" and "When to transmit?" To adapt to the available bandwidth, it is necessarily to transmit the subset of the data packets if the entire set of packets can not be transmitted. "Packet Significance" quantifies the importance of the frame by elaborately incorporating frames' dependency. Greedy approach is used in selecting packets and transmission schedule is determined based on the Packet Significance. The proposed scheme is tested using publicly available MPEG-4 video clips. Decoding engine is embedded in the simulation software and user perceivable QoS is exposeed in termstermiSNR. Throughout the simulation based experiment, the performance of the proposed scheme is compared two other schemes: Size-based packet scheduling and Bit-rate based best effort packet scheduling. SAPS successfully incorporates the semantics of a packet and improves user perceivable QoS significantly. It successfully provides unequal protection to more important packets.