METHOD AND DEVICE FOR CONTROLLING A MULTI-CHANNEL AUDIO FRAME LOSS MASK
Patent Information
- Application Number
- DE602019067756
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2019-05-16
- Publication Date
- 2025-03-26
- Estimated Expiration
- 2039-05-16
AI Technical Summary
Current packet loss concealment techniques for stereo and multichannel audio fail to maintain spatial characteristics, leading to unnatural sound when dealing with lost or corrupted data packets, especially in mobile telecommunication networks with bandwidth constraints.
A method that generates a down-mix error concealment frame, transforms it into a frequency domain, decorrelates it, and combines it with a residual signal spectrum to produce an energy-adjusted decorrelated signal, which is then used to synthesize a multichannel audio frame, avoiding discontinuities and maintaining energy levels.
This approach effectively approximates lost or corrupted multichannel audio frames, ensuring stable energy levels and natural sound reproduction by phase adjusting peaks and using noise spectra to maintain desired correlations, thus improving audio quality during packet loss events.