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A reliable LZ data compressor on reconfigurable coprocessors

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3 Author(s)
Wei-Je Huang ; Center for Reliable Comput., Stanford Univ., CA, USA ; Saxena, N. ; McCluskey, E.J.

Data compression techniques based on the Lempel-Ziv (LZ) algorithm are widely used in a variety of applications, especially in communications and data storage. However, since the LZ algorithm involves a considerable amount of parallel comparisons, it may be difficult to achieve a very high throughput using software approaches on general-purpose processors. In addition, error propagation due to single-bit transient errors during LZ compression causes a data integrity problem. We present an implementation of LZ data compression on reconfigurable hardware with concurrent error detection for high performance and reliability. Our approach achieves 100 Mbps throughput using four Xilinx 4036XLA FPGA chips. We also present an inverse comparison technique for LZ compression to guarantee data integrity with less area overhead than traditional systems based on duplication. The resulting execution time overhead and compression ratio degradation due to concurrent error detection is also minimized

Published in:

Field-Programmable Custom Computing Machines, 2000 IEEE Symposium on

Date of Conference:

2000

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