Delivery system, transmission apparatus, and delivery method

A transmission apparatus bidirectionally communicable with a plurality of reception terminals through a network, comprising:

• a correction section which pre-obtains a plurality of correction coefficients according to acoustic characteristics of the plurality of reception terminals and forms a plurality of corrected audio signals according to an audio signal and the correction coefficients;
• a conversion section which converts the plurality of corrected audio signals into a plurality of pieces of delivery data;
• and
• a delivery server which delivers the delivery data to the reception terminal through a network,
• wherein the transmission apparatus delivers to the reception terminals the delivery data according to the acoustic characteristics thereof.

A delivery method, comprising the steps of:

• calculating a plurality of correction coefficients with which an audio signal is corrected according to a plurality of spaces having different acoustic characteristics;
• forming corrected audio signals according to the audio signal and the correction coefficients;
• converting the corrected audio signals into delivery data and supplying the delivery data to a delivery server;
• and
• causing the delivery server to deliver delivery data according to acoustic characteristics of the reception terminals when they issue a data delivery request.