Patent ID: 8463414

Claim:
A method for estimating panning gain parameters for low bit rate stereo transmission, comprising the steps of: a. deriving estimate of time delay between left and right audio channels in a multi-channel signal from a time delay subsystem, wherein the time delay system employs an inter-channel time difference (ITD) processor for; i. receiving the left audio signal from a first microphone and receiving the right audio signal from a second microphone; ii. downsampling the left and right audio signals to a lower bandwidth and sampling rate; iii. producing a windowed and normalized cross correlated signal of the left and right audio signals; b. employing cross-correlation between the left and right audio channels in the time delay subsystem; c. employing a normalized cross-correlation within an inter-channel intensity difference (IID) processor; and d. deriving an estimate of panning gains for the left and right audio channels from the IID processor.