Audio encoding and decoding method and audio encoding and decoding device
AssigneeHuawei Technologies Co., Ltd.
InventorsBingyin Xia, Jiawei Li, Zhe Wang
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Abstract
An audio decoding method includes obtaining an encoded bitstream; performing bitstream demultiplexing on the encoded bitstream, to obtain a high frequency band parameter of a current frame of an audio signal, wherein the high frequency band parameter indicates a location, a quantity, and an amplitude or energy of a tone component comprised in a high frequency band signal of the current frame; obtaining a reconstructed high frequency band signal of the current frame based on the high frequency band parameter; and obtaining an audio output signal of the current frame based on the reconstructed high frequency band signal of the current frame.
Claims23
An audio decoding method, comprising:
- obtaining an encoded bitstream;
- performing bitstream demultiplexing on the encoded bitstream to:
- obtain a high frequency band parameter of a current frame of an audio signal, wherein the high frequency band parameter comprises a combined location and quantity parameter and either a first amplitude parameter or a first energy parameter of a tone component in a high frequency band signal of the current frame, and wherein a high frequency band corresponding to the high frequency band signal comprises at least one frequency region;
- obtain a second combined location and a quantity parameter in the at least one frequency region;
- and
- parse the encoded bitstream based on the second combined location and the quantity parameter to obtain a second amplitude parameter or a second energy parameter of the tone component in the current frequency region;
- obtaining a reconstructed high frequency band signal of the current frame based on the high frequency band parameter;
- and
- obtaining an audio output signal of the current frame based on the reconstructed high frequency band signal.
An audio decoder, comprising:
- one or more processors;
- and
- a memory coupled to the one or more processors and configured to store programming instructions that, when executed by the processor, cause the audio decoder to be configured to:
- obtain an encoded bitstream;
- perform bitstream demultiplexing on the encoded bitstream to:
- obtain a high frequency band parameter of a current frame of an audio signal, wherein the high frequency band parameter comprises a combined location and quantity parameter and either an amplitude or an energy of a tone component in a high frequency band signal of the current frame, and wherein a high frequency band corresponding to the high frequency band signal comprises at least one frequency region;
- obtain a second combined location and a quantity parameter in a current frequency region in the at least one frequency region;
- and
- parse the encoded bitstream based on the second combined location and the quantity parameter to obtain a second amplitude parameter or a second energy parameter of the tone component in the current frequency region;
- obtain a reconstructed high frequency band signal of the current frame based on the high frequency band parameter;
- and
- obtain an audio output signal of the current frame based on the reconstructed high frequency band signal.
A non-transitory computer-readable storage medium storing computer instructions that, when executed by one or more processors of an audio encoder, cause the audio encoder to be configured to:
- obtain an encoded bitstream;
- perform bitstream demultiplexing on the encoded bitstream to obtain a high frequency band parameter of a current frame of an audio signal, wherein the high frequency band parameter comprises a combined location and quantity parameter and either an amplitude or an energy of a tone component comprised in a high frequency band signal of the current frame, and wherein a high frequency band corresponding to the high frequency band signal comprises at least one frequency region;
- obtain a second combined location and a quantity parameter in a current frequency region in the at least one frequency region;
- parse the encoded bitstream based on the second combined location and the quantity parameter to obtain a second amplitude parameter or a second energy parameter of the tone component in the current frequency region;
- obtain a reconstructed high frequency band signal of the current frame based on the high frequency band parameter;
- and
- obtain an audio output signal of the current frame based on the reconstructed high frequency band signal.
Dependencies are inferred from the claim text.