Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"MPEG-4"”.
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VLSI Architectures for Mpeg-4 Video Object Decoding
These architectures have been combined into an MPEG-4 video object decoder. The decoder is designed to meet the computation and memory requirements for high-resolution video object decoding at 30 frames per second.
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FPGA Prototyping of a Watermarking Algorithm for MPEG-4
… widely adapted video compression standard is MPEG-4. Discrete cosine transform (DCT) domain watermarking is a secure algorithm which could survive video compression procedures and, most importantly, attacks attempting to remove the watermark, with a visibly degraded video quality result after …
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Particle swarm optimization applications to mpeg-4 transmission over ZigBee
… amounts of data. Therefore, in this research MPEG-4 video transmission over ZigBee is the aim as its bandwidth is too low and the limitation could become a real problem which makes the video transmission over IEEE 802.15.4 networks difficult to achieve. Due to the low bandwidth of the ZigBee …
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An intelligent approach to quality of service for MPEG-4 video transmission in IEEE 802.15.1
… and an artificial neural network algorithms. MPEG-4 video compression has been used in this work to optimise the transmission. This research further utilises an ‘added-buffer’ to prevent excessive data loss of MPEG-4 video over IEEE 802.15.1transmission and subsequently increase picture …
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Impacto do gerenciamento ativo de filas em redes IP transportando fluxos de vídeo H.264/MPEG-4 AVC
… effort que transportam fluxos de vídeo H.264/MPEG-4 AVC em tempo-real ao se aplicar a técnica de gerenciamento ativo de filas ARED em lugar da técnica droptail tradicional. As análises são feitas tanto do ponto de vista dos fluxos de vídeo isoladamente quanto do ponto de vista dos fluxos TCP …
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Study of the audio coding algorithm of the MPEG-4 AAC standard and comparison among implementations of modules of the algorithm
… reconverts it into an uncompressed signal. ISO-MPEG is a standard for high-quality, low bit-rate video and audio coding. The audio part of the standard is composed by algorithms for high-quality low-bit-rate audio coding, i.e. algorithms that reduce the original bit-rate, while guaranteeing high …
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Analog parallel processor solutions for video encoding
… such mobile terminals are defined by either the MPEG-4/H.263 or H.264 video standard. All of these standards are based on the block-based hybrid approach. As block-based motion estimation (ME) is responsible for most of the power consumption of such hybrid video encoders, this thesis deals mostly …
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Nonrigid Motion Modeling and Analysis in Video Sequences for Realistic Facial Animation
… facial motion, and facial animation standard in MPEG-4.
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Arquitectura versátil para la codificación de vídeo multi-estándar: aportaciones metodológicas para el diseño de sistemas reutilizables y sistemas en un chip
… H.263 o los estándares ISO/IEC 13818-2 (MPEG-2) e ISO/IEC 14496-2 (MPEG-4). Con el doble objetivo de validar la arquitectura propuesta y experimentar con las metodologías de diseño de sistemas en un chip se diseña una realización de la mencionada arquitectura para la codificación de vídeo …
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Adaptive delivery of real-time streaming video
… are typically compressed in a format such as MPEG-4 to achieve bandwidth efficiency. Video compression exploits redundancy between frames to achieve higher compression. However, packet loss can be detrimental to compressed video with interdependent frames because errors potentially propagate …
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Modeling And Dynamic Resource Allocation For High Definition And Mobile Video Streams
… be capable of modeling video traces encoded with MPEG-4 Part2, MPEG-4 Part10, and Scalable Video Codec: SVC) standards, using various encoding settings. We also provide a large and publicly-available collection of HD video traces along with their analyses results. These analyses include a full …
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Wireless speech and audio communications
… Codes (IRCC). In our investigations, the MPEG-4 Advanced Audio Coding (AAC), the MPEG-4 Transform-Domain Weighted Interleaved Vector Quantization (TwinVQ) and the Adaptive MultiRate WideBand (AMR-WB) audio/speech codecs were incorporated in the sophisticated UEP turbo transceiver, which …
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The application of manifold based visual speech units for visual speech recognition
… when compared with that attained for standard (MPEG- 4) viseme models. Two experimental results indicate that: 1. The developed VSR system achieved 80-90% correct recognition when the system has been applied to the identification of 60 classes of VSUs, while the recognition rate for the standard …
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Estimation of LRD present in H.264 video traces using wavelet analysis and proving the paramount of H.264 using OPF technique in wi-fi environment.
… The second part of the research deals with MPEG-4 and H.264 encoder. The study is carried out to prove which encoder is superior to the other. We need to know which encoder can provide excellent Quality of Service (QoS) and reliability. This study proves with the help of Hurst parameter that …
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Compensación de movimiento avanzada para codificación de vídeo
… el usuario que las propuestas por el estándar MPEG-4) y otros tipos especiales de regiones, con el fin de codificarlos de forma preferente respecto al resto de la imagen. Aquí se refiere por un lado a regiones de interés especial para el espectador, como por ejemplo regiones faciales que …
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A Cost Shared Quantization Algorithm and its Implementation for Multi-Standard Video CODECS
… Video Coding (HEVC). HEVC, successor to H.264/MPEG-4 AVC, aims to substantially improve coding efficiency compared to AVC High Profile. The thesis presents a high performance circuit shared architecture that can perform the quantization operation for HEVC, H.264/AVC, AVS, VC-1, MPEG- 2/4 and …
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VEBit: um algorítmo para codificação de vídeo com escalabilidade
… quantizador escalar semelehante ao empregado no MPEG 4. A técnica de escalabilidade em bit-planes implementada permite a divisão da saída de codificador em taxas complementares e com granularidade fina. Este algorítmo e parte integrante doprojeto SAM (Sistema Adaptativo Multimídia), que busca …
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Effective design, configuration, and use of digital CCTV
… and 92 Kbps). At a bit rate quality of 52 Kbps (MPEG-4), the number of faces correctly identified reached significance. In Study 3, 80 participants each detected 32 events from four frame rate CCTV video conditions (1, 5, 8, and 12 fps). Below 8 frames per second, correct detections and task …
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3D face processing for animation and biometrics
… linearized optimization procedure. (4) An MPEG-4 compatible performance driven avatar capable of rendering of highly detail shape and texture of the subject in real time. (5) A new method for measuring similarity of 3D facial shapes using facial level curves. The measurement comprises the …
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