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Tytuł:
FPGA-based dvcpro hd decoder implementation using impulse C
Autorzy:
Cichoń, S.
Gorgoń, M.
Powiązania:
https://bibliotekanauki.pl/articles/305808.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
high definition
video decoding
high level languages
pipelined architecture
intraframe
Opis:
High-level languages (HLL) for defining hardware implementation are important in both academic and commercial research. Impulse C could be an example of such language. This environment provides a programming model and library of functions for parallel applications, targeting FPGA-based platforms with the ability to partition the algorithm between software and hardware. This article’saim is to briefly describe DVCPRO HD, one of the intra-frame video-coding algorithms widely used in consumer equipment. DVCPRO HD is a DCT -based lossy video coding algorithm which uses variable-length coding (VLC) and runlength encoding (RLE) to achieve a 5:1 compression ratio. This paper presents DVCPRO HD video-coding-standard principles as well as decoder implementation working in real-time, compliant with the afore-mentioned standard and implemented in Impulse C. According to the authors’ knowledge, the presented solution is the first FPGA implementation of this coding standard which includes all three VLC stages of data re-arrangement. What is more, this is the first DVCPRO HD implementation which utilizes Impulse C.
Źródło:
Computer Science; 2013, 14 (4); 531-546
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hierarchical Fast Selection of Intraframe Prediction Mode in HEVC
Autorzy:
Siast, J.
Stankowski, J.
Domański, M.
Powiązania:
https://bibliotekanauki.pl/articles/226081.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
video coding
high efficiency video coding (HEVC)
intraframe prediction
fast mode selection
Opis:
In the new HEVC standard, there are 35 intraframe prediction modes. Therefore, real-time implementations need fast mode pre-selection to reduce the computational load of cost comparison for individual modes. In this paper, a simple technique is proposed to reduce the complexity of the Unified Intra Prediction by decreasing the mode candidate number evaluated in the Rough Mode Decision step. We call this approach hierarchical as we decrease stepwise the angles between the directions of the prediction modes that are tested. Obviously, the fast mode selection results in significant complexity reduction obtained at the cost of choosing a sub-optimum mode related to slightly reduced compression performance. In the paper, it is proposed how to calculate the trade-off between encoder complexity and compression performance, using the ratio of relative coding time reduction and average bitrate increase estimated for constant decoded video quality. Extensive experiments prove that this ratio is much higher for the proposed technique than for many other techniques from the references.
Źródło:
International Journal of Electronics and Telecommunications; 2016, 62, 2; 147-151
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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