This paper presents a DSP implementation of real-time JPEG 2000 encoder system. Among several modules in JPEG 2000 encoder, the lifting algorithm for discrete wavelet transform (DWT) and the embedded block coding with optimized truncation (EBCOT) comprise more than 85% of the encoding complexity. Thus, it is very important to design and optimize these two modules in order to increase the encodi...

PURPOSE To quantify retinal structure and progression using spectral-domain optical coherence tomography (SDOCT) in patients with retinitis pigmentosa (RP) associated with retinitis pigmentosa GTPase regulator gene (RPGR) mutations. DESIGN Retrospective observational case series. METHODS Setting: Moorfields Eye Hospital, London, United Kingdom. SUBJECTS Both eyes of 32 patients. SDOCT fol...

JPEG2000 is the latest still-image coding standard. It was designed to overcome the limitations of the original JPEG standard and provide high quality images at low bit rates. The JPEG2000 algorithm is fundamentally based on the Discrete Wavelet Transform (DWT) and Embedded Block Coding with Optimal Truncation (EBCOT). Both of the algorithms are computationally intensive and require significant...

In this letter, we propose parallel-pass architecture for Embedded block coding with optimal truncation (EBCOT) entropy encoding in JPEG 2000. In the proposed method the time consuming sequential pass architecture is replaced with the parallel-pass approach. The experimental results show that the proposed method reduces the processing time by 22.6% as compared with the Taubman’s Kakadu architec...

Embedded block coding with optimized truncation (EBCOT) is the most important technology in the latest image-coding standard, JPEG 2000. The hardware design of the block-coding engine in EBCOT is critical because the operations are bit-level processing and occupy more than half of the computation time of the whole compression process. A general purpose processor (GPP) is, therefore, very ineffi...

Introduction: The JPEG2000 standard [1] has shown better performance than the widely used JPEG standard [2]. Nevertheless, efforts to improve JPEG2000 never stop. Long et al. [3] modified the quantisation step-size selection schemes for the uniform scalar quantisation used in JPEG2000 to improve the lossy compression. Lian et al. [4] proposed two skipping methods applied to the embedded block c...

We develop a multi-channel channel-optimized scheme for EZW image compression in a noisy transmission environment. A block-based modification for EZW is applied to improve the robustness of EZW, and to produce several coded bitstreams for transmission over multiple channels with different noise conditions. Then the respective channel noise is considered in the ratedistortion analysis, and the r...

Embedded block coding with optimized truncation (EBCOT) is the most important part of JPEG 2000. Due to the bit level operation and the three-pass scanning technique, the EBCOT may take more than 50% operation time in the JPEG 2000. This paper presents a high efficiency concurrent EBCOT (HECEBC) entropy encoder hardware architecture. The proposed HECEBC can concurrently process the four samples...

Embedded Block Coding with Optimal Truncation (EBCOT) is an entropy coding algorithm adopted by JPEG2000 still image compression standard. It is a quadtree encoding method representing a fault tolerance design challenge. EBCOT operates on independently coded blocks, and is therefore more robust to channel errors than many other wavelet based schemes. However, computer-induced errors can still d...

Digital image compression is a very popular topic in the field of multimedia processing. The major focus of work is to develop different compression schemes/algorithms to provide good visual quality fewer bit to represent an image in digital format. This paper work describes software and hardware implementation of Embedded Zerotree Wavelet (EZW) image Coder-Decoder (CODEC).The EZW image CODEC i...