INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, INFORMATION PROVISION DEVICE, AND INFORMATION PROVISION SYSTEM

摘要

The purpose of the invention is to appropriately provide content information on the basis of feature point information extracted from the audio information of the content. Even when secondary audio is being listened to on a client device (140), the client device (140) extracts feature point information from only the main audio and sends an inquiry to an information provision server (150), so an ACR service can be implemented by the information provision server (150), which does not readily have secondary audio feature point information. In addition, in the event of delivery of content having main audio and multiple sets of audio information, there is no need for the information provision server (150) side to prepare secondary audio feature point information, so the capacity of a database does not need to be increased.