Coding of multiple audio signals

A method of communication, the method comprising:

• determining an inter-channel mismatch value indicative of a temporal misalignment between a frequency-domain reference channel and a frequency-domain target channel;
• adjusting the frequency-domain target channel based on the inter-channel mismatch value to generate an adjusted frequency-domain target channel;
• performing a down-mix operation, based on the frequency-domain reference channel and the adjusted frequency-domain target channel, to generate a mid channel and a side channel;
• generating a predicted side channel based on the mid channel;
• generating a residual channel based on the side channel and the predicted side channel;
• and
• encoding the residual channel as part of a bitstream.

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

• determining an inter-channel mismatch value indicative of a temporal misalignment between a frequency-domain reference channel and a frequency-domain target channel;
• adjusting the frequency-domain target channel based on the inter-channel mismatch value to generate an adjusted frequency-domain target channel;
• performing a down-mix operation, based on the frequency-domain reference channel and the adjusted frequency-domain target channel, to generate a mid channel and a side channel;
• generating a predicted side channel based on the mid channel;
• generating a residual channel based on the side channel and the predicted side channel;
• and
• encoding the residual channel as part of a bitstream.

An apparatus comprising:

• means for adjusting a frequency-domain target channel based on an inter-channel mismatch value to generate an adjusted frequency-domain target channel, the inter-channel mismatch value indicative of a temporal misalignment between a frequency-domain reference channel and the frequency-domain target channel;
• means for performing a down-mix operation, based on the frequency-domain reference channel and the adjusted frequency-domain target channel, to generate a mid channel and a side channel;
• and
• means for generating a residual channel based on the side channel and a predicted side channel, the residual channel to be encoded as part of a bitstream.