HDTVマルチチャネル音声3-1方式のモニタレベルと品質評価 : 音声技術および一般 : 放送現業

抄録

Optimum listening levels and Sound quality evaluation of 3-1 surround Sound in Hi-vision HDTV system were studies. A hundred non-professionai listeners were attended to the experiment as subjects. AS for the listening levels, meam level that listeners judged optimum was 83.9 dB(C-weighted) for the classical music, and 79.8 dB for Japanese populer music. Those values are 8〜10 dB lower than that of the professonal studio mixing engineers. Difference will be presumably come from the difference of experience between professional studio engineers and non-professional listeners. As for the sound quality evaluation, most of listeners highly evaluated 3-1 surround sound rather than conventional 2 channel stereo sound. Using the factor analysis method, subjective evaluations of 3-1 surround sound are classified to three independent factors, i.e. the first factor "Ambience", the second "Surround" and the third "Sound volume". Results of this study will be useful for the standardization of HDTV multichannel sound system.