Method, Apparatus, and System for Processing Audio Data

A device for processing an audio signal, comprising:

• at least one processor;
• and
• one or more memories coupled to the at least one processor and configured to store instructions for execution by the at least one processor to cause the device to:
• receive a bitstream corresponding to the audio signal;
• decode the bitstream to obtain a silence insertion descriptor (SID) type of a current frame of the audio signal and a low-band parameter of the current frame, wherein the SID type of the current frame is either a first SID type or a second SID type;
• obtain a low-band signal of the current frame based on the low-band parameter;
• obtain, based on the SID type of the current frame, a high-band parameter of the current frame by:
• generating the high-band parameter of the current frame locally when the SID type of the current frame is the first SID type;
• or
• decoding the bitstream when the SID type of the current frame is the second SID type;
• obtain a high-band signal of the current frame based on the high-band parameter;
• and
• obtain a synthesis signal of the current frame based on the low-band signal and the high-band signal.

A computer program product comprising instructions that are stored on a non-transitory computer-readable medium and that, when executed by a processor of a device, cause the device to:

• receive a bitstream corresponding to an audio signal;
• decode the bitstream to obtain a silence insertion descriptor (SID) type of a current frame of an audio signal and a low-band parameter of the current frame, wherein the SID type of the current frame is either a first SID type or a second SID type;
• obtain a low-band signal of the current frame based on the low-band parameter;
• obtain, based on the SID type of the current frame, a high-band parameter of the current frame by:
• generating the high-band parameter of the current frame locally when the SID type of the current frame is the first SID type;
• or
• decoding the bitstream when the SID type of the current frame is the second SID type;
• obtain a high-band signal of the current frame based on the high-band parameter;
• and
• obtain a synthesis signal of the current frame based on the low-band signal and the high-band signal.