Since ISZW used successive integer squares as quantization thresholds, it shortened the distance between two consecutive thresholds, but increased coding times, thus reduced coding speed.
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但是,由于ISZW使用连续的整数平方作为量化阈值,缩短了相邻阈值间的距离,却增加了编码的次数,降低了编码速度。
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