VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Transmission of images over general packet radio services using advanced wavelet image codecs and digital signal processor chips
    Planinšič, Peter ; Gleich, Dušan ; Mohorko, Jože
    We develop a wavelet-based Godec using a low-cost and low-energy-consuming 16-bit fixed-point digital signal processor (OSP). The target application is designed to grab an image from a camera, Gode ... the image using a wavelet-based Godec, and send a coded file over a wireless global system for mobile communications/ general packet radio services (GSM/GPRS) network. Since the channel capacity of the GSM/GPRS network is limited, a OSP with a relatively low computational power is sufficient to implement an image codec. A trade-off is made between the complexity and the efficiency of the wavelet-based image coder. Any implementation issues conce ming the wavelet transform and entropy coding are discussed. Lifting schemes for a 9-7 and a 5-3 filter bank are used. The novel ordering of bit-plane bits is presented. The proposed co-dec is comparable with a JPEG2000 Godec in the rate-distortion sense. The experimental results show that the implementation of JPEG 2000 on the presented platform runs 60% slower than the proposed codec. The coded file is transmitted over a wireless net-work using Internet protocol/user datagram protocol/trivial file transfer protocol (IP/UDP/TFTP).
    Vir: Journal of electronic imaging. - ISSN 1017-9909 (Letn. 15, št. 4, 2006, [10] str.)
    Vrsta gradiva - članek, sestavni del
    Leto - 2006
    Jezik - angleški
    COBISS.SI-ID - 11058454

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