依赖混合噪声信号的多声道信号产生器、音频编码器及相关方法
By modeling and decorrelation processing the background noise characteristics of the stereo channel, a smooth noise matching the stereo signal is generated, which solves the unnatural problem caused by noise uncorrelation in the stereo system, and realizes natural signal switching and reduces data transmission rate.
Patent Information
- Application Number
- CN202610265312.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2020-08-31
- Filing Date
- 2021-06-30
- Publication Date
- 2026-07-17
AI Technical Summary
In stereo systems, existing technologies cannot effectively generate soft noise that is related to actual background noise, resulting in unnatural stereo images and sudden audible transitions during switching, failing to adapt to changes in background noise caused by speaker movement.
By modeling the background noise characteristics and correlation of the two channels, stereo soft noise is generated. A decorrelated noise signal is generated using a mixed noise source and a decorrelater, and coherence processing is performed in the decoder to ensure the spatial consistency of the noise signal.
It achieves natural switching of stereo signals and preservation of spatial images, improves user experience, reduces data transmission rate, and adapts to changes in background noise.
Smart Images
Figure FT_1 
Figure FT_2 
Figure FT_3