Anchor model adaptation device, integrated circuit, av (audio video) device, online self-adaptation method, and program therefor

Disclosed is a device that sorts an AV stream by using the audio stream of the AV stream, wherein the device performs the online self-adaptation regulation of the anchor model for an acoustic space that is intended for use in said sorting. Also disclosed is a method therefor. Said device divides the input audio stream into partial data having identical audio features and estimates a single probability model for the divided partial data. In addition, the estimated single probability model is clustered with the single probability models for other audio features that have, thus far, been accumulated, and a new anchor model for the acoustic space is generated.