JPEG2000 is an emerging state-of-the-art standard for still image compression. The standard not only offers superior rate-distortion performance, but also provides a wide range of features and functionality compared to JPEG. However, advantages of JPEG2000 come at the expense of computational complexity and memory requirement in bit-plane coding. So the low cost ASIC design for JPEG2000 hardware implementation remains a challenge. Therefore, a dedicated hardware implementation for EBCOT block coder is necessary. In this thesis a high-throughput EBCOT block coder is proposed. There are two main parts in the EBCOT block coder: context modeling and MQ-coder. For context modeling a novel pass-parallel module based on vertical causal mode is proposed. Pass-parallel modeling which reduces the cycles to check the sample to be coded processes three original sequential passes in a single pass and generates one or two context labels every cycle. It is fast and saves 8K bits internal memory. Since context modeling will generate one or two context labels in one cycle, multi-bit MQ-coder which could avoid the buffer between context modeling and MQ-coder overflows is needed. For MQ-coder three approaches which process one or two context labels in one cycle are proposed. Furthermore, we modified the architecture of MQ-coder and proposed two low-power implementation concepts : reduction of memory access and disabling unused block.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0901103-165524 |
| Date | 01 September 2003 |
| Creators | Chang, Tso-Hsuan |
| Contributors | Chung-Ho Chen, Shen-Fu Hsiao, Shiann-Rong Kuang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0901103-165524 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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