Innowireless Co., Ltd.

Jong Tae Chung

Jin Soup Joung

Young Su Kwak

Jin Man Kim

Hyun Seok Cho

The present invention relates to a method of automatically controlling the volume level of communication speech for Mean Opinion Score (MOS) measurement, which, before evaluating the quality of communication speech using a MOS measurement method, automatically controls the volume level of actual communication speech to a predetermined optimal level, thus improving the reliability of MOS values. The present invention provides a method of automatically controlling a volume level of communication speech for MOS measurement using MOS measurement equipment, the MOS measurement equipment calculating an MOS value based on results obtained by comparing a speech signal, which is received via a voice communication network, with a reference speech signal, the method comprising the steps of (a) when an audio signal, including a speech signal, is received from counterpart MOS measurement equipment in a predetermined format, measuring the volume level of the speech signal and comparing the volume level of the measured speech signal with a reference volume level; (b) transmitting a predetermined intrinsic audible frequency signal, which corresponds to 'proper,' 'excess' or &#x2018;insufficiency&#x2019; information resulting from the comparison, to the counterpart MOS measurement equipment; and (c) the counterpart MOS measurement equipment interpreting the predetermined intrinsic audible frequency signal, which corresponds to the &#x2018;proper,&#x2019; &#x2018;excess&#x2019; or &#x2018;insufficiency&#x2019; information, and controlling the volume level of the communication speech.

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Seongnam, South Korea

Jong Tae Chung