SIGNAL PROCESSOR AND SIGNAL PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To solve the problem that sound quality deterioration on acoustic feeling occurs due to the execution of high-frequency interpolation depending on the frequency characteristics of an audio signal.SOLUTION: The signal processor includes: frequency detection means for detecting a frequency satisfying a predetermined condition from an audio signal; offset means for offsetting the detection frequency obtained by the frequency detection means in accordance with the frequency characteristics of the detection frequency or the vicinity thereof; reference signal generation means for extracting a signal from an audio signal on the basis of the detection frequency after offset by the offset means to generate a reference signal; interpolation signal generation means for generating an interpolation signal on the basis of the generated reference signal; and signal synthesis means for synthesizing the generated interpolation signal with the audio signal to execute the high-frequency interpolation of the audio signal.SELECTED DRAWING: Figure 6