Audio decoding method for processing stereo audio signals using a variable prediction direction
Patent Information
- Authority / Receiving Office
- HK · HK
- Patent Type
- Patents
- Current Assignee / Owner
- FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV
- Filing Date
- 2024-12-24
- Publication Date
- 2026-07-10
AI Technical Summary
Existing multi-channel audio processing techniques face challenges in achieving high coding gain while maintaining audio quality and reducing computational complexity, particularly in situations where mid/side coding does not yield optimal results due to phase shifts or amplitude differences between channels.
A method and apparatus for stereo audio decoding that uses a prediction of a second combination signal from a first combination signal, derived from the original signals using a mid/side combination rule, with a frequency-domain encoding approach and a critically sampled transform like MDCT, and adaptive prediction direction selection based on energy levels to enhance coding gain and reduce computational complexity.
This approach achieves significant coding gain with reduced bit rate and improved audio quality by efficiently masking quantization noise and minimizing computational overhead, suitable for stereo and multi-channel audio applications.
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