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Performance Improvement of Vector Quantization with Bit-parallelism Hardware
Pi-Chung Wang
Pages - 153 - 163 | Revised - 15-09-2009 | Published - 21-10-2009
Published in International Journal of Image Processing (IJIP)
MORE INFORMATION
KEYWORDS
Image Compression, Vector Quantization, Nearest Neighbor Search, Look-up Tables
ABSTRACT
Vector quantization is an elementary technique for image compression; however, searching for the nearest codeword in a codebook is time-consuming. In this work, we propose a hardware-based scheme by adopting bit-parallelism to prune unnecessary codewords. The new scheme uses a “Bit-mapped Look-up Table” to represent the positional information of the codewords. The lookup procedure can simply refer to the bitmaps to find the candidate codewords. Our simulation results further confirm the effectiveness of the proposed scheme.
| 1 | Kekre, H. B., & Sarode, T. (2010). Two Level Vector Quantization Method for Codebook Generation using Kekre’s Proportionate Error Algorithm. International Journal of Image Processing, 4(1), 1-10. |
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Dr. Pi-Chung Wang
- Taiwan
pcwang.tw@gmail.com
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