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Browsing by Subject "video decompression"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Implementacja w układzie reprogramowalnym operacji kwantyzacji odwrotnej na potrzeby wewnątrzramkowej dekompresji wideo
    (Wydawnictwa AGH, 2010) Cichoń, Sławomir
    Video data quantization is present, in different variations, in almost all video compression algorithms. Its purpose is to reduce less important data, while at the same time increase the efficiency of video compression, in the consecutive variable length coding process. In this paper preliminary scaling and quantization algorithms used in digital video standard (DV - Digital Video), will be described in details. Implementation of inverse quantization algorithm in the pipeline architecture, as one of processing elements in complete DV decoder, will be presented.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Koncepcja implementacji trzyetapowego dekodowania VLC (w standardzie cyfrowego wideo DV) w układzie FPGA
    (Wydawnictwa AGH, 2009) Cichoń, Sławomir
    VLC coding (Variable Length Coding) is one of entropy type of coding. With different modifications it is used in many of video compression standards, both moving, and still images, e.g. JPEG, MPEG-2, DV (IEC 61834). In this paper VLC coding algorithm used in DV will be described in details. Concept design of VLC decoder implementation, exercising all three stages in reprogrammable chip, will be presented, with consideration of reusing it in hardware DV decoder, as processing element in the pipeline architecture.