Encoding of multiple audio signals

A method comprising:

• receiving, at a receiver of a device, an encoded bitstream from a second device, the encoded bitstream including a temporal mismatch value and stereo parameters, wherein the temporal mismatch value and the stereo parameters are determined based on a reference channel captured at the second device and a target channel captured at the second device;
• decoding, at a decoder of the device, the encoded bitstream to generate a first frequency-domain output signal and a second frequency-domain output signal;
• performing a first inverse transform operation on the first frequency-domain output signal to generate a first time-domain signal;
• performing a second inverse transform operation on the second frequency-domain output signal to generate a second time-domain signal;
• based on the temporal mismatch value, mapping one of the first time-domain signal or the second time-domain signal as a decoded target channel;
• mapping the other of the first time-domain signal or the second time-domain signal as a decoded reference channel;
• performing a causal time-domain shift operation on the decoded target channel based on the temporal mismatch value to generate an adjusted decoded target channel;
• and
• outputting a first output signal and a second output signal, the first output signal based on the decoded reference channel and the second output signal based on the adjusted decoded target channel.

A non-transitory computer-readable medium comprising instructions that, when executed by a processor within a decoder, cause the processor to perform operations comprising:

• decoding an encoded bitstream received from a second device to generate a first frequency-domain output signal and a second frequency-domain output signal, the encoded bitstream including a temporal mismatch value and stereo parameters, wherein the temporal mismatch value and the stereo parameters are determined based on a reference channel captured at the second device and a target channel captured at the second device;
• performing a first inverse transform operation on the first frequency-domain output signal to generate a first time-domain signal;
• performing a second inverse transform operation on the second frequency-domain output signal to generate a second time-domain signal;
• based on the temporal mismatch value, mapping one of the first time-domain signal or the second time-domain signal as a decoded target channel;
• mapping the other of the first time-domain signal or the second time-domain signal as a decoded reference channel;
• performing a causal time-domain shift operation on the decoded target channel based on the temporal mismatch value to generate an adjusted decoded target channel;
• and
• outputting a first output signal and a second output signal, the first output signal based on the decoded reference channel and the second output signal based on the adjusted decoded target channel.

An apparatus comprising:

• means for receiving an encoded bitstream from a second device, the encoded bitstream including a temporal mismatch value and stereo parameters, wherein the temporal mismatch value and the stereo parameters are determined based on a reference channel captured at the second device and a target channel captured at the second device;
• means for decoding the encoded bitstream to generate a first frequency-domain output signal and a second frequency-domain output signal;
• means for performing a first inverse transform operation on the first frequency-domain output signal to generate a first time-domain signal;
• means for performing a second inverse transform operation on the second frequency-domain output signal to generate a second time-domain signal;
• based on the temporal mismatch value, means for mapping one of the first time-domain signal or the second time-domain signal as a decoded target channel;
• means for mapping the other of the first time-domain signal or the second time-domain signal as a decoded reference channel;
• means for performing a causal time-domain shift operation on the decoded target channel based on the temporal mismatch value to generate an adjusted decoded target channel;
• and
• means for outputting a first output signal and a second output signal, the first output signal based on the decoded reference channel and the second output signal based on the adjusted decoded target channel.