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Speech quality evaluation using "phoneme-specific" sentences.

A W Huggins, R S Nickerson

    The Journal of the Acoustical Society of America
    |May 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

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    This study introduces a novel method for creating speech materials for quality evaluation. The approach groups similar speech sounds into sentences, reliably detecting subtle quality differences in vocoders.

    Area of Science:

    • Speech processing
    • Acoustic phonetics
    • Signal processing

    Background:

    • Subjective speech quality evaluation requires carefully designed test materials.
    • Existing methods may not efficiently isolate the impact of specific acoustic properties on perceived quality.

    Purpose of the Study:

    • To present a new methodology for constructing speech materials for subjective quality assessment.
    • To evaluate the effectiveness of this method in identifying vocoder performance differences.

    Main Methods:

    • Speech sounds were classified based on acoustic properties.
    • Sentences were constructed to group phonemes with similar acoustic characteristics.
    • Subjective quality data were collected using rank ordering and rating tasks for 12 linear predictive vocoders at 2600 bps.

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    Main Results:

    • The proposed method reliably detected small differences in speech quality.
    • The approach provided diagnostic insights into the causes of quality degradation.
    • Phoneme-specific sentences were generated as a resource.

    Conclusions:

    • The novel speech material design method enhances the precision of subjective quality evaluation.
    • This technique aids in diagnosing vocoder performance issues.
    • The generated phoneme-specific sentences can be utilized in future speech quality research.