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Table 9 The statistics of the scores (mean ± 1 standard deviation) rated in the SI and SD MUSHRA tests with the vocode natural speech (NAT), the proposed approach with correct prosodic-acoustic features (CPRO), the proposed approach (HPM), and the baseline system (BSL) with similar RMSE to the proposed approach

From: A parametric prosody coding approach for Mandarin speech using a hierarchical prosodic model

  BSL HPM CPRO NAT
SD 50.1 ± 22.0 74.5 ± 18.8 78.7 ± 16.5 94.9 ± 9.9
SI 48.3 ± 21.5 74.1 ± 17.4 72.2 ± 18.3 95.8 ± 10.4