Patent ID: 11922954
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 8:
9. A device, comprising:
a receiver;
a decoder coupled to the receiver and configured to:
receive an Nth-frame bitstream, wherein N is a positive integer greater than zero, comprising at least two frames, wherein the at least two frames comprise at least one first-type frame comprising a downmixed signal and at least one second-type frame, wherein the second-type frame does not comprise a downmixed signal; and
for the Nth-frame bitstream:
decode the first type frame to obtain an Nth-frame downmixed signal; and
when the Nth-frame bitstream is the second-type frame:
determine, according to a preset first rule, m-frame downmixed signals in at least one-frame downmixed signal preceding an Nth-frame downmixed signal; and
obtain the Nth-frame downmixed signal according to the m-frame downmixed signals based on a predetermined first algorithm, wherein m is a positive integer greater than zero, and wherein N is a positive integer greater than one; and

at least one speaker coupled to the decoder and configured to output, based on the bitstream, an audio signal.