Audio bandwidth expansion method and expansion apparatus thereof
An audio bandwidth and bandwidth expansion technology, which is applied in the field of audio coding, can solve problems such as inability to adjust and poor high-frequency reconstruction of music signals, and achieve accurate high-frequency reconstruction and improve the quality of audio restoration.
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[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0052] Such as figure 1Shown is the method flowchart of the embodiment of the present invention, the method for audio frequency bandwidth extension, comprises the following steps:
[0053] Step 101: detect the encoding mode of the current frame signal in the hybrid ACELP / TVC core encoder to distinguish the signal type, if the encoding mode of the current frame signal in the core encoder is ACELP256, then the current frame is a speech signal; if the current fra...
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