Audio caption generation method, audio caption generation apparatus, and program

Abstract

Even in a case where an amount of training data is small, a caption for an audio signal is generated with high accuracy. An audio caption generation apparatus () generates a caption for an input target audio. A training data storage () stores a training data set including a set of an audio signal and a caption corresponding thereto. An audio similarity calculation unit () calculates similarity between the target audio and each audio signal of training data. A guidance caption retrieval unit () acquires a plurality of captions corresponding to an audio signal similar to the target audio. A caption generation unit () generates a caption for the target audio by determining words in order from the head on the basis of the acquired captions.