Research Article
Adaptive Variable Degree- Zero-Trees for Re-Encoding of Perceptually Quantized Wavelet Packet Transformed Audio and High-Quality Speech
Table 4
Comparison of the re-encoder average bit-rates.
| Test signal | SEGSNR (dB) | PESQ | Average bit-rate (bit/sec) | EZW | SPIHT | Modified EZW | Modified SPIHT | Proposed AVDZ |
| Male 1 | 23.91 | 4.20 | 39945 | 43784 | 34994 | 34418 | 33159 | Female 1 | 21.57 | 4.17 | 39269 | 43391 | 35900 | 35255 | 33521 | Male 2 | 20.36 | 3.93 | 38346 | 41374 | 32095 | 31753 | 29921 | Female 2 | 19.68 | 3.93 | 37955 | 41583 | 31850 | 31592 | 29689 | Male 3 | 25.05 | 3.86 | 40788 | 41614 | 30659 | 31782 | 28749 | Female 3 | 25.33 | 3.81 | 41690 | 42929 | 31861 | 32813 | 29853 | Music 1 | 18.51 | 4.42 | 60020 | 63841 | 53181 | 52615 | 48503 | Music 2 | 22.49 | 4.42 | 63284 | 65727 | 50872 | 51497 | 46530 |
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