| 摘要 |
PROBLEM TO BE SOLVED: To provide an audio information classifying device capable of detecting not only a musical section but also a sound section. SOLUTION: First of all, the frequency data at every a second are extracted from inputted audio information. Then, a mean energy operation part 5 obtains mean energy for a second, and decides a silence section and a sound section in a second. For the section decided as the sound section, an energy change rate operation part 8 obtains an energy change rate at every a second, and extracts the sound section, and inputs its time code to a sound section hold part 10. For the section not decided as the sound section, a mean band energy ratio operation part 11 obtains a mean band energy ratio at every a second, and extracts the musical section, and inputs its time code to a musical section hold part 13. |
