Fully Scalable Wavelet-Based Image Coding for Transmission Over Heterogeneous Networks
نویسندگان
چکیده
This paper presents a fully scalable image coding scheme based on the Set Partitioning in Hierarchical Trees (SPIHT) algorithm. The proposed algorithm, called Fully Scalable SPIHT (FS-SPIHT), adds the spatial scalability feature to the SPIHT algorithm. It provides this new functionality without sacrificing other important features of the original SPIHT bitstream such as: compression efficiency, full embeddedness and rate scalability. The flexible output bitstream of the FSSPIHT encoder which consists of a set of embedded parts related to different resolutions and quality can be easily adapted (reordered) to given bandwidth and resolution requirements by a simple transcoder (parser) without decoding the bitstream. FS-SPIHT is a very good candidate for image communication over heterogenous networks which requires high degree of scalability from image coding systems. Other applications such as progressive web browsing and flexible image storage and retrieval would benefit from full scalability feature of FS-SPIHT.
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