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

Claim 10:
11. The device of claim 9, wherein the first-type frame comprises a downmixed signal and a stereo parameter set, wherein the second-type frame comprises neither the downmixed signal nor the stereo parameter set, and wherein the decoder is further configured to:
obtain an Nth-frame stereo parameter set after the decoder decodes the Nth-frame bitstream and when the Nth-frame bitstream is the first-type frame;
after the decoder determines that the Nth-frame bitstream is the second-type frame:
determine, according to a preset second rule, k-frame stereo parameter sets in at least one-frame stereo parameter set preceding an Nth-frame stereo parameter set; and
obtain the Nth-frame stereo parameter set according to the k-frame stereo parameter sets based on a predetermined fourth algorithm, wherein k is a positive integer greater than zero; and

restore, based on a predetermined third algorithm, the Nth-frame downmixed signal to Nth-frame audio signals using a stereo parameter in the Nth-frame stereo parameter set.