Apparatus and method for generating bandwidth extension signal

摘要

An apparatus for generating a bandwidth extended signal includes an anti-sparseness processing unit to perform anti-sparseness processing on a low-frequency spectrum; and a frequency domain high-frequency extension decoding unit to perform high-frequency extension encoding in the frequency domain on the low-frequency spectrum on which the anti-sparseness processing is performed.

主权项

1. A method of generating a bandwidth extended signal, the method comprising:
performing noise filling on a decoded low-frequency spectrum; performing, by using at least one processing device, anti-sparseness processing by which a constant amplitude component is inserted into spectral coefficients remaining zero in the decoded low-frequency spectrum on which the noise filling is performed; and generating a high-frequency spectrum by using the decoded low-frequency spectrum on which the anti-sparseness processing is performed.