AUDIO SIGNAL COMPRESSION METHOD AND APPARATUS USING DEEP NEURAL NETWORK-BASED MULTILAYER STRUCTURE AND TRAINING METHOD THEREOF
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United States of America Patent
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Issued Date -
Aug 24, 2023
app pub date -
Jan 13, 2023
filing date -
Feb 22, 2022
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Abstract
A method, executed by a processor for compressing an audio signal in multiple layers, may comprise: (a) restoring, in a highest layer, an input audio signal as a first signal; (b) restoring, in at least one intermediate layer, a signal obtained by subtracting an upsampled signal, which is obtained by upsampling the audio signal restored in the highest layer or an immediately previous intermediate layer, from the input audio signal as a second signal; and (c) restoring, in a lowest layer, a signal obtained by subtracting an upsampled signal, which is obtained by upsampling the audio signal restored in an intermediate layer immediately before the lowest layer, from the input audio signal as a third signal, wherein the first signal, the second signal, and the third signal are combined to output a final restoration audio signal.
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