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Table 4 Residual conversion results for the rock music signal.

From: Quality Enhancement of Compressed Audio Based on Statistical Conversion

Subband index Vector length Selected vectors per subband Multiplier Sorting information size (bits/coeff.) Distance between source and target Distance between resynthesized and target Distance between resynthesized and target without sorting Distance between resynthesized and target without sorting, without DCT
9 52 70 4 2.78 1.8670 0.0540 0.4346 0.6155
10 52 66 4 2.78 1.9462 0.0523 0.4696 1.1201
11 103 182 60 1.04 1.9266 0.2238 0.7906 1.1925
12 103 182 60 1.04 0.7779 0.2032 0.4832 0.6792
13 103 182 100 1.04 1.2707 0.2414 0.8083 1.1748
  1. Cepstral and residual conversion results in terms of the average quadratic distance between time-aligned vectors over each subband. The fourth column shows the multiplier along each subband and the fifth column shows the resulting number of bits/coefficient of the sorting information. The sixth column shows the initial distances between source and target vectors. The seventh column shows the distance between the resynthesized and target vectors when the full algorithm is applied. The two last columns show the results when the algorithm is not applied correctly.