Patent ID: 9552819
Date: 2017-01-24
CPC Classifications: G10L,H04S

Claim:
1. A method performed by one or more processing devices for transmitting an input audio signal having N channels, comprising: selecting M channels for a downmixed output audio signal based on a desired bitrate, where N and M are non-zero positive integers and N is greater than M; downmixing and encoding the N channels to the M channels using the one or more processing devices and a combination of multiplet pan laws to obtain a pulse code modulation (PCM) bed mix containing M multiplet-encoded channels; transmitting the PCM bed mix at or below the desired bitrate; separating the M multiplet-encoded channels; upmixing and decoding each of the M multiplet-encoded channels using the one or more processing devices and the combination of multiplet pan laws to extract the N channels from the M multiplet-encoded channels and obtain a resultant output audio signal having N channels, the upmixing further comprising: rendering the resultant output audio signal in a playback environment having a playback channel layout.