Method and device for limiting output synthesis distortion in an audio codec - Patents.com
JP2024529556A5Active Publication Date: 2025-08-13VOICEAGE CORPORATION
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Patent Information
- Application Number
- JP2024508526
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2021-08-10
- Filing Date
- 2022-08-05
- Publication Date
- 2025-08-13
- Estimated Expiration
- 2042-08-05
AI Technical Summary
Technical Problem
Existing audio codecs suffer from distortion issues due to clipping and saturation, particularly in multi-channel codecs, which affect the quality of immersive audio experiences when using headphones or loudspeaker-based systems.
Method used
A two-stage distortion limiter is implemented in the audio signal processing pipeline, comprising a level detector and a saturation detector to calculate and update control gains, attenuating the signal to reduce distortion and preserve spatial audio characteristics.
Benefits of technology
The two-stage distortion limiter effectively reduces distortion in audio signals, improving the quality of immersive audio experiences by minimizing clipping and saturation, especially in scenarios with bit errors or strong saturation.
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Abstract
A two-stage distortion limiter and method for limiting distortion in a sound signal, e.g., an output sound signal synthesis from a sound signal decoder, is provided. In a first stage, a level detector detects an amplitude value of the sound signal and calculates a control gain using the detected amplitude value, and an attenuator reduces the level of the sound signal using the control gain. In a second stage, a saturation detector detects saturation of the sound signal and updates the control gain in response to detecting the saturation.
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