Patent ID: 6167372
Filing Date: 2000-12-26
Classification: G10L

Abstract:
A signal identifying device comprising:pitch extracting means for extracting a pitch component of an input signal;energy calculating means for calculating an energy component of said input signal; andidentifying means for executing a predetermined operation on said pitch component and on said energy component and for identifying whether said input signal is a voice signal or a music signal based on a result of said predetermined operation, whereinsaid pitch extracting means extracts a pitch strength as said pitch component,said energy calculating means calculates a frame energy wherein one frame is defined as a predetermined number of samples of said input signal, and calculates a differential frame energy as said energy component by subtracting a predetermined time period average value from said frame energy, andsaid identifying means calculates an average value and a variance value of said pitch strength and calculates an average value and a variance value of said differential frame energy, so as to identify said input signal based on said average value and said variance value of said pitch strength and said average value and said variance value of said differential frame energy.