Method and system for providing stereo-channel based multi-channel audio coding
View Patent ↗A system for generating stereo-channel audio signals with surround information is disclosed. The system includes a surround mapping unit configured to receive signals from a number of audio channels and generate a pair of stereo-channel audio signals based on the audio channels. The pair of stereo-channel audio signals includes binaural and spatial information. The system also includes a stereo-channel encoder configured to receive and encode the pair of stereo-channel audio signals from the surround mapping unit thereby generating a pair of encoded stereo-channel audio signals. The system further includes a stereo-channel decoder configured to receive and decode the pair of encoded stereo-channel audio signals thereby obtaining the pair of stereo-channel audio signals. The pair of stereo-channel audio signals are capable of being used to generate surround effect.
1. A system for generating audio signals, comprising:
a surround mapping unit configured to receive input audio signals having surround sound information contained therein from a plurality of audio channels and generate, via a nonlinear surround mapping scheme, a pair of output stereo-channel audio signals based on the input audio signals, where the pair of output stereo-channel audio signals are embedded with surround sound information, including binaural cues and sound spatial image information; and
a stereo-channel encoder configured to encode the pair of output stereo-channel audio signals generated by the surround mapping unit to produce a pair of encoded stereo-channel audio signals with the surround sound information, including binaural cues and sound spatial image information, wherein
the pair of encoded stereo-channel audio signals with the surround sound information is transmitted to a stereo-channel decoder via one channel, and
the surround sound information included in the pair of encoded stereo-channel audio signals is capable of being used by the stereo-channel decoder to generate surround sound effect.
2. The system of claim 1 wherein the nonlinear surround mapping scheme uses a plurality of node layers, each node layer having a plurality of nodes;
wherein output of each node in a first node layer is forwarded to each and every node in a second node layer.
3. The system of claim 1 wherein the pair of encoded stereo-channel audio signals are forwarded to the stereo-channel decoder via wired communications.
4. The system of claim 1 wherein the pair of encoded stereo-channel audio signals are forwarded to the stereo-channel decoder via wireless communications.
5. The system of claim 1 further comprising a post-processing unit configured to receive the pair of stereo-channel audio signals from the stereo-channel decoder and generate a plurality of outputs based on the pair of stereo-channel audio signals.
6. The system of claim 1 wherein the surround mapping unit and the stereo-channel encoder reside in a transmitting component; and
wherein the stereo-channel decoder resides in a receiving component.
7. The system of claim 6 wherein the transmitting component and the receiving component do not reside in the same device; and
wherein the receiving component includes a portable media player.
8. A system for generating audio signals, comprising:
an encoder component having:
control logic configured to receive input audio signals having surround sound information contained therein from a plurality of audio channels and generate, via a nonlinear surround mapping scheme, a pair of output stereo-channel audio signals based on the input audio signals, where the pair of output stereo-channel audio signals are embedded with surround sound information, including binaural cues and sound spatial image information; and
control logic configured to encode the pair of output stereo-channel audio signals to produce a pair of encoded stereo-channel audio signals with surround sound information, including binaural cues and sound spatial image information, wherein
the pair of encoded stereo-channel audio signals with the surround sound information is transmitted to a stereo-channel decoder via one channel, and
the surround sound information included in the pair of encoded stereo-channel audio signals is capable of being used by the stereo-channel decoder to generate surround sound.
9. The system of claim 8 wherein the nonlinear surround mapping scheme uses a plurality of node layers, each node layer having a plurality of nodes;
wherein output of each node in a first node layer is forwarded to each and every node in a second node layer.
10. The system of claim 8 wherein the pair of encoded stereo-channel audio signals are forwarded to the decoder component via wired communications.
11. The system of claim 8 wherein the pair of encoded stereo-channel audio signals are forwarded to the decoder component via wireless communications.
12. The system of claim 8 wherein the decoder component is further configured to generate a plurality of outputs based on the pair of stereo-channel audio signals.
13. The system of claim 8 wherein the encoder component resides in a transmitting component; and
wherein the decoder component resides in a receiving component.
14. The system of claim 8 wherein the transmitting component and the receiving component do not reside in the same device; and
wherein the receiving component includes a portable media player.