Particular program detection device, method, and program

摘要

A particular program detection device is provided which can detect a particular program segment even in a program signal contaminated with noise by adaptively modifying a detection sensitivity for a scene change point. A noise level detecting section ( 12 ) detects a noise level of a program signal outputted from a signal input section ( 11 ). Based on the noise level detected by the noise level detecting section ( 12 ), a detection sensitivity determining section ( 13 ) determines a detection sensitivity which is used when a silent portion of the program signal is determined by a silent portion detecting section ( 14 ). In accordance with the detection sensitivity determined by the detection sensitivity determining section ( 13 ), the silent portion detecting section ( 14 ) detects a portion having a low audio level of the program signal as a silent portion. A particular program determining section ( 15 ) calculates a time difference between each silent portion detected by the silent portion detecting section ( 14 ) and a silent portion following this, and based on the calculated time difference, determines whether or not the silent portion is a particular program.