Pose correction metadata for interactive head tracking

By using segmented domain reconstruction metadata processing and interactive head tracking technology, the problem of comb filter artifacts in immersive audio was solved, improving the stability and quality of audio rendering.

CN122422931APending Publication Date: 2026-07-17DOLBY LABORATORIES LICENSING CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DOLBY LABORATORIES LICENSING CORP
Filing Date
2024-12-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing immersive audio encoding and decoding technologies struggle to effectively avoid comb filter artifacts when dealing with changes in head posture, resulting in poor audio rendering.

Method used

The reconstructed metadata is calculated using a segmented domain method. By interpolating the amplitude in the low-frequency range and only interpolating the amplitude in the high-frequency range, comb filtering artifacts caused by phase difference are avoided. This is combined with interactive head tracking technology to generate attitude correction metadata.

Benefits of technology

It achieves stability and consistency in audio rendering effects when the head posture changes, avoids comb filter artifacts, and improves the quality of audio experience.

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Abstract

公开了用于对沉浸式音频内容进行编码和解码的系统、方法和设备。一些示例提供了用于对输入音频信号进行编码的方法。示例方法包括获得具有沉浸式音频内容的输入音频信号，获得第一组头部姿态，并渲染第一组双耳信号。所述方法还可以包括获得第二组头部姿态并渲染第二组双耳信号。所述方法可以包括：在第一频率范围内计算第一重建元数据以使得能够重建所述第二组双耳信号的幅值和相位两者；以及在第二频率范围内计算第二重建元数据以使得能够重建所述第二组双耳信号的幅值。所述方法可以包括将所述第一组双耳信号、所述第一重建元数据和所述第二重建元数据编码在比特流中。
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