To make it possible to easily verify, on a reception side, that metadata has been inserted into an audio stream. A metafile having meta-information for acquiring, at a reception device, an audio stream into which metadata has been inserted is transmitted. Identification information indicating that the metadata has been inserted into the audio stream is inserted into the metafile. At the reception side, it is possible to easily verify, from the identification information inserted into the metafile, that the metadata has been inserted into the audio stream.