Patent Number: 6,167,372

Title: Signal identifying device, code book changing device, signal identifying method, and code book changing method

Abstract: A signal identifying device which can identify an input signal easily includes a pitch extracting (4Y) for extracting a pitch component of the input signal (S1), and energy calculating unit (4X) for calculating an energy component of the input signal, and identifying unit (4Z) for executing a predetermined operation to the pitch component and the energy component and for identifying whether the input signal is a voice signal or music signal. The voice signal generally has the characteristics evident in energy, and has strong periodicity (i.e., pitch component) comparing compared to the music signal.

Inventors: Maeda; Yuji (Tokyo, JP)

Assignee: Sony Corporation

International Classification: G10L 19/14 (20060101); G10L 19/00 (20060101); G10L 11/00 (20060101); G10L 11/02 (20060101); G10L 013/02 ()

Expiration Date: 12/26/2017