The following publications are possibly variants of this publication:
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- Hadamard transform based equal-average equal-variance equal-norm nearest neighbor codeword search algorithmShu-Chuan Chu, John F. Roddick, Zhe-Ming Lu, Jeng-Shyang Pan. icmcs 2004: 671-674
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- A hierarchical fast encoding algorithm for vector quantization with PSNR equivalent to full searchZhibin Pan, Koji Kotani, Tadahiro Ohmi. iscas 2002: 797-800 [doi]