Wavelets offer an elegant technique for representing the levels of details present in an image. When an image is decomposed using wavelets, the low pass components carry more information than the high pass components. The possibility of better elimination of high pass components gives higher compression ratio for wavelet based techniques. To achieve higher

This paper presents a fully scalable texture coding algorithm for arbitrarily shaped video object based on the 3D-SPIHT algorithm. The proposed algorithm, called Fully Scalable Object-based 3D-SPIHT (FSOB-3DSPIHT), modifies the 3D-SPIHT algorithm to code video objects with arbitrary shape and adds spatial and temporal scalability features to it. It keeps important features of the original 3D-SP...

A designer can chose from several options when mapping an application into a combination of hardware and software. Usage of an ASIP offers the advantage of a large design freedom, allowing optimal tuning of performance and costs. However there are two major problems related to the design of ASIPs: 1) the design trajectory is long, and 2) it is impossible to do a quantitative search of the whole...

Fast and efficient image compression can be achieved with the progressive wavelet coder (PWC) introduced in this paper. Unlike many previous wavelet coders, PWC does not rely on zerotrees or other ordering schemes based on parent-child wavelet relationships. PWC has a very simple structure, based on two key concepts: (1) data-independent reordering and blocking, and (2) lowcomplexity independen...

Three-dimensional wavelet coding of volumetric medical images provides better coding performance compared to corresponding 2D methods by exploiting the inter-slice correlation that exists in such data. It introduces however latencies when it comes to transmitting specific parts of the volume. This paper presents an extension to 3DSPlHT which allows 3D Region of Interest (ROI) coding. ROI coding...

In this work, we incorporate a multiresolutional coding functionality into the SPIHT algorithm [1]. The multiresolutional coding can be considered as a kind of the region of interest (ROI) coding with multiple regions of interest. Therefore, the ROI coding proposed by authors can be extended for the multiresolutional functionality without any cost in performance. The parent of ROI (PROI) and th...

During the last decade, there has been an increasing interest in the design of very fast wavelet image encoders focused on specific applications like interactive real-time image and video systems, running on power-constrained devices such as digital cameras, mobile phones where coding delay and/or available computing resources (working memory and power processing) are critical for proper operat...

A compression scheme for calibrated images depicting a static scene from arbitrary viewpoints is presented. 3-D scene geometry is reconstructed, and view-dependent texture maps are generated from all images. Texture is waveletcoded using the SPIHT coding scheme extended to 4-D, exploiting correlations within as well as between texture maps. During decoding, all texture maps are simultaneously a...

This paper presents an embedded video compression with error resilience and error concealment using three dimensional SPIHT (3-D SPIHT) algorithm. We use a new method for partitioning the wavelet coefficients into spatio-temporal (s-t) blocks to get higher error resilience and to support error concealment. Instead of grouping adjacent coefficients, we group coefficients in some fixed intervals ...

We propose a highly scalable image compression scheme based on the set partitioning in hierarchical trees (SPIHT) algorithm. Our algorithm, called highly scalable SPIHT (HS-SPIHT), supports spatial and SNR scalability and provides a bitstream that can be easily adapted (reordered) to given bandwidth and resolution requirements by a simple transcoder (parser). The HS-SPIHT algorithm adds the spa...