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    Wyświetlanie 1-4 z 4
    Tytuł:
    Architecture Design of The Hardware H.264/AVC Video Decoder
    Autorzy:
    Roszkowski, M.
    Abramowski, A.
    Wieczorek, M.
    Pastuszak, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/226831.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    H.264/AVC
    video compression
    FPGA
    architecture design
    Opis:
    The need for real-time video compression systems requires a particular design methodology to achieve high troughput devices. The paper describes the architecture of the H.264/AVC decoder able to support SDTV and HDTV resolutions. The design applies many optimization techniques to reduce the resource consumption and maximize the throughput. The archietcture is verified with the software reference model JM16 and synhesized for FPGA technology. The maximal working frequency is 100 MHz for Stratix II devices.
    Źródło:
    International Journal of Electronics and Telecommunications; 2010, 56, 3; 291-300
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimized Inter Prediction for H.264 Video Codec
    Autorzy:
    Bernatin, T.
    Sundari, G.
    Anselin Nisha, Sahaya
    Godwin Premi, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1844641.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    H.264
    intra prediction
    inter prediction
    M9K
    timing synchronization
    QP
    Opis:
    High definition video transmission is one of the prime demands of modern day communication. Changing needs demand diverse features to be offered by the video codec standards, H.264 fits to these requirements for video compression. In this work, an attempt has been made to optimize the inter prediction along with improved intra prediction to ensure the minimal bit rates thereby reduction in the channel bandwidth, which is required in most of the wireless applications. In intraprediction, only DC prediction mode is chosen out of 9 modes with 4*4 luma blocks that reduces the coding complexity towards optimal logic utilization in order to support typical FPGA board for hardware implementation. Most significantly, Inter prediction is carried out utilizing the M9K blocks efficiently with proper timing synchronization to reduce the latency in the encoding operation. Experimental set up comprising of two Altera DE2-115 boards connected through Ethernet cable demonstrated the video transmission. These optimized intra prediction and inter prediction stages resulted in significant improvement in the video compression possessing good subjective quality and increased video compression.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 2; 309-314
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Suitability of Transport Techniques for Video Transmission in IP Networks
    Autorzy:
    Uhl, Tadeus
    Klink, Janusz
    Hoppe, Christian
    Powiązania:
    https://bibliotekanauki.pl/articles/226182.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    service quality
    MPEG2-TS
    MPEG-DASH
    H.264
    H.265
    VP9
    PEVQ
    VQuad-HD
    Opis:
    The paper discusses the problem of video transmission in an IP network. The authors consider the ability of using the most popular video codecs that use both the MPEG2 Transport Stream and Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH). The main emphasis was given to ensuring the quality of service and quality assessment methods, taking into account not only the service- or network provider’s point of view but also the end user’s perspective. Two quality assessment approaches were presented, i.e. objective and subjective methods. The authors presented the results of the quality evaluation for H.264/MPEG-4, H.265/HEVC and VP9 codecs.The objective measurements, proved by statistic alanalysis of user opinion scores, confirmed the ability of using H.265 and VP9 codecs in both real time and streaming transmissions, while the quality of video streaming over HTTP with the H.264 codec proved inadequate. The authors also presented a connection between the dynamics of network bandwidth changing and MPEG-DASH mechanism operation and their influence on the quality experienced by users.
    Źródło:
    International Journal of Electronics and Telecommunications; 2020, 66, 1; 133-138
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficient H.264 Intra Frame CODEC with Best Prediction Matrix Mode Algorithm
    Autorzy:
    Hamdy, Sara
    Zekry, Abdelhalim
    Mohamed, Wael A.
    Powiązania:
    https://bibliotekanauki.pl/articles/226164.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    best prediction matrix mode (BPMM)
    compression efficiency
    H.264/AVC
    Huffman coding
    Intra prediction
    Opis:
    The continuous growth of smart communities and ever-increasing demand of sending or storing videos, have led to consumption of huge amount of data. The video compression techniques are solving this emerging challenge. However, H.264 standard can be considered most notable, and it has proven to meet problematic requirements. The authors present (BPMM) as a novel efficient Intra prediction scheme. We can say that the creation of our proposed technique was in a phased manner; it's emerged as a proposal and achieved impressive results in the performance parameters as compression ratios, bit rates, and PSNR. Then in the second stage, we solved the challenges of overcoming the obstacle of encoding bits overhead. In this research, we try to address the final phase of the (BPMM) codec and to introduce our approach in a global manner through realization of decoding mechanism. For evaluation of our scheme, we utilized VHDL as a platform. Final results have proven our success to pass bottleneck of this phase, since the decoded videos have the same PSNR that our encoder tells us, while preserving steady compression ratio treating the overhead. We aspire our BPMM algorithm will be adopted as reference design of H.264 in the ITU.
    Źródło:
    International Journal of Electronics and Telecommunications; 2020, 66, 3; 571-582
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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