Importance

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Abstract

A communication system which enables a comfortable group call to be realized in a weak radio wave environment or an environment where ambient sound is loud is provided. This communication system (300) includes an API server (10) that manages a group call, a mobile communication terminal (20) that performs communication via a mobile communication network, and a headset (21) that exchanges voice data with the mobile communication terminal (20) by short range wireless communication. The headset (21) includes a speech emphasizer that emphasizes a speech part included in a speech relatively with respect to ambient sound, and the mobile communication terminal (20) extracts the speech part from the voice data received from the headset (21) and transmits the speech part to the partner of the group call. Communication with the mobile communication terminal (20) is controlled by an instruction related to the control of a communication quality, transmitted from the API server (10).

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First Claim