SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD

摘要

A signal processing device comprises: a band detecting means for detecting a frequency band which satisfies a predetermined condition from an audio signal; a reference signal generating means for generating a reference signal in accordance with a detection band by the band detecting means; a reference signal correcting means for correcting the generated reference signal on the basis of a frequency characteristic thereof; a frequency band extending means for extending the corrected reference signal up to a frequency band higher than the detection band; an interpolation signal generating means for generating an interpolation signal by weighting each frequency component within the extended frequency band in accordance with a frequency characteristic of the audio signal; and a signal synthesizing means for synthesizing the generated interpolation signal with the audio signal.

主权项

1. A signal processing device, comprising:
a band detecting unit configured to detect a frequency band which satisfies a predetermined condition from an audio signal; a reference signal generating unit configured to generate a reference signal in accordance with a detection band by the band detecting unit; a reference signal correcting unit configured to correct the generated reference signal on a basis of a frequency characteristic of the generated reference signal; a frequency band extending unit configured to extend the corrected reference signal up to a frequency band higher than the detection band; an interpolation signal generating unit configured to generate an interpolation signal by weighting each frequency component within the extended frequency band in accordance with a frequency characteristic of the audio signal; and a signal synthesizing unit configured to synthesize the generated interpolation signal with the audio signal.