主权项 |
1. A method performed by one or more processing devices for upmixing a two-channel input audio signal having a first input channel and a second input channel into an upmixed multi-channel output audio signal having greater than two channels, comprising:
calculating a first dematrixing coefficient, denoted as a, and a second dematrixing coefficient, denoted as b, based on an inter-channel level difference, denoted as ICLD, and an inter-channel phase difference between the first and second input channels, denoted as ICPD; multiplying the first input channel by the first dematrixing coefficient to generate a first sub-signal and the second input channel by the second dematrixing coefficient to generate a second sub-signal; mixing the first sub-signal and the second sub-signal in a linear manner to generate an output channel of the upmixed multi-channel output audio signal; and outputting the generated output channel for playback through speakers. |