Audio Object Control via External Preset Metadata
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Solution Overview
Problem
Users find it inconvenient to directly control all object signals in a downmix signal, making it difficult to reproduce an optimal audio signal with multiple objects, especially for non-experts.
Innovation Solution
An apparatus and method for processing audio signals that use preset information and metadata to control the level and position of objects within a downmix signal, allowing external preset information to be applied separately from the downmix signal, enabling dynamic or static adjustments based on the audio source characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a user directly controls all object signals in a downmix signal, then the audio signal can be precisely controlled, but it becomes inconvenient and complex for users to manage multiple objects
Solution Approach 1:
The patent segments the control of multiple audio objects by introducing preset information that categorizes and pre-configures object parameters. Instead of requiring users to control each object individually, the system divides the control space into predefined presets (e.g., music mode, speech mode, nature mode) that collectively manage multiple objects with a single selection action.
Solution Approach 2:
The patent applies preliminary action by pre-configuring object parameters before user interaction. Preset information is prepared in advance with optimal parameter settings for different audio scenarios, allowing the system to automatically apply appropriate controls without requiring users to manually adjust each object's level and position.
2Manufacturing precision
If expert control is used to reproduce optimal audio signals, then high quality audio reproduction is achieved, but it becomes difficult for non-experts to achieve the same result
Solution Approach 1:
The patent enables self-service by allowing the audio system to automatically select and apply appropriate preset information based on the audio content characteristics. The system analyzes the audio signal and autonomously determines which preset to apply, eliminating the need for user expertise while maintaining high-quality reproduction through automated intelligent selection.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting audio parameters (level, position, panning) based on the selected preset information. The system modifies object parameters according to the audio source characteristics and the chosen preset, transforming the audio signal to achieve optimal reproduction without requiring manual parameter adjustment by the user.
3Ease of operation
If preset information is applied to control object levels and positions, then ease of operation is improved, but the system complexity increases due to external preset information processing
Solution Approach 1:
The patent introduces preset information as an intermediary between the user's simple selection and the complex audio processing. The preset information acts as a mediator that translates user-friendly preset selections into detailed object control commands, shielding the user from the underlying complexity while enabling precise audio control through the preset framework.
Data Source
AI summary
A method of processing an audio signal, the method including receiving a downmix signal and a first information, the downmix signal including at least one object, the first information including object information indicating an attribute of the at least one object; receiving a second information, the second information including external preset information and applied object number information, the external preset information being an external input and including an external preset rendering parameter and external preset metadata, the applied object number information indicating a number of objects to which the external preset information is applied; generating downmix processing information controlling panning or gain of the downmix signal by using the object information and the external preset information based on the applied object number information; and modifying the downmix signal by using the downmix processing information.