Research On High Reliable VLSI Implementation Of TagTree Coding

Compared with previous Joint Photographic Experts Group (JPEG) standard, the stillimage coding standard JPEG2000, incorporating many advanced image coding skills,such as the Discrete Wavelet Transform (DWT) and the Embedded Block Coding withOptimized Truncation (EBCOT), delivers higher coding efficiency and betterreconstruction quality. This algorithm is currently widely used in commercial areas,such as the JPEG2000image compression chip ADV202. However, the lowerprocessing speed, less resistance to error and unreliability of ADV202make itinapplicable in the critical aerospace and military fields. As a result, the design ofhigh-performance image compression chip based on JPEG2000with high speed,improved reliability and enhanced error resilience capability is of great significance forour country‘s aerospace development. TagTree coding is one of the core modules inJPEG2000, whose encoding output will be used in the header information of thepackage data, therefore, it plays a key role in reconstructing the image. So high reliableVLSI implementation of TagTree algorithm is critical to the performance of JPEG2000image compression chip.There has not been deep research into the hardware implementation of TagTreeboth at home and abroad. Existing methods have the problems of fixed data format,high resource usage and low coding efficiency, what‘s more, the space reliability designis not considered. We propose a resolution-adaptive and high-reliable TagTree codingstructure for JPEG2000in this paper. In the coding structure, each sub-band of DWT istreated as a basic element to encode, and different sub-bands of the whole resolutionshare the same element encoding structure, which has led to a great reduce of resources;A strategy of registering what has been calculated for future usage is carried out whichsaved the resource and improved the speed as well; independence between continuousimages is ensured through a reliable reset strategy, which stops the error from spreading;the Triple Modular Redundancy (TMR) strategy is applied to resist the single particleradiation in aerospace. Finally we are able to develop a resolution-adaptive TagTreecoder which is capable of performing reliable coding for any number of truncated layers.This work will be applied in the high performance JPEG2000image compression chip.