1. A broadcast receiving method comprising: a receiving step of receiving, simultaneously with broadcast contents, additional information containing keyword information for specifying an object that appears in the broadcast contents, and a scene code indicating a scene of the broadcast contents, the additional information and the scene code being broadcasted; a language model specifying step of specifying, out of language models retained in advance, the language model corresponding to the received scene code when the scene code is received; a speech recognition step of performing speech recognition of a voice uttered by a viewing person, by using the specified language model; a specifying step of specifying the keyword information based on the speech recognition result; and a displaying step of displaying the additional information containing the specified keyword information.