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US 12,532,139 B2Granted
Audio signal processing method and audio signal processing apparatus
AssigneeXround Inc.
InventorsPeng Lee, Li-Hao Yang
Life of this patent
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Abstract
An audio signal processing method is provided. The method separates a left and a right channel audio signal to a center-left and center-right channel audio signals, and a side-left and side-right channel audio signals, and processes the center and side channel audio signals by a Head Related Transfer Function (HRTF) so as to simulate the audio signals into several audio source positions related to a user, then synthesizes the processed audio signals into dual channel audio signals according to the user's hearing characteristics by a frequency compensation process. The invention further provides an audio signal processing apparatus to perform the audio signal processing method.
Claims10
An audio signal processing method, comprising:
- separating a left channel audio signal of a dual channel audio signal to a center-left channel audio signal and a side-left channel audio signal;
- separating a right channel audio signal of the dual channel audio signal to a center-right channel audio signal and a side-right channel audio signal;
- processing the center-left channel audio signal and the center-right channel audio signal by a center head related transfer function to simulate the center-left channel audio signal and the center-right channel audio signal at a first audio source position and a second audio source position related to a user respectively;
- processing the side-left channel audio signal and the side-right channel audio signal by a side head related transfer function to simulate the side-left channel audio signal and the side-right channel audio signal at a third audio source position and a fourth audio source position related to the user respectively;
- compensating the center-left channel audio signal and the center-right channel audio signal processed by the center head related transfer function, and the side-left channel audio signal and the side-right channel audio signal processed by the side head related transfer function by a frequency compensation process according to a hearing characteristics of the user;
- and
- generating a compensated dual channel audio signal by synthesizing the compensated center-left channel audio signal, the compensated center-right channel audio signal, the compensated side-left channel audio signal, the compensated side-right channel audio signal, the original center-left channel audio signal, and the original center-right channel audio signal.
4 more elements
An audio signal processing apparatus, comprising:
- a channel separation unit receiving a left channel audio signal and a right channel audio signal of a dual channel audio signal, separating the left channel audio signal to a center-left channel audio signal and a side-left channel audio signal, and separating the right channel audio signal to a center-right channel audio signal and a side-right channel audio signal;
- an audio computing unit receiving and processing the center-left channel audio signal and the center-right channel audio signal by a center head related transfer function to simulate the center-left channel audio signal and the center-right channel audio signal at a first audio source position and a second audio source position related to a user respectively, and receiving and processing the side-left channel audio signal and the side-right channel audio signal by a side head related transfer function to simulate the side-left channel audio signal and the side-right channel audio signal at a third audio source position and a fourth audio source position related to the user respectively;
- an audio synthesizing unit compensating the center-left channel audio signal and the center-right channel audio signal processed by the center head related transfer function, and the side-left channel audio signal and the side-right channel audio signal processed by the side head related transfer function by a frequency compensation process according to a hearing characteristics of the user;
- and
- wherein the audio synthesizing unit generates a compensated dual channel audio signal by synthesizing the compensated center-left channel audio signal, the compensated center-right channel audio signal, the compensated side-left channel audio signal, the compensated side-right channel audio signal, the original center-left channel audio signal, and the original center-right channel audio signal.
2 more elements
Dependencies are inferred from the claim text.