Audio Loudness Compensation for Dynamic Range and Peak Limiting
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Solution Overview
Problem
Existing audio processing methods struggle to achieve accurate loudness equalization for media data during playback, as loudness is affected by dynamic range control and peak limiting, leading to difficulties in maintaining consistent loudness across different media content.
Innovation Solution
The proposed audio processing method involves obtaining media data and its metadata, performing first loudness compensation for dynamic range control, determining a second loudness compensation value for peak limiting based on audio features, and then applying both compensations to achieve target media data for playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dynamic range control and peak limiting are applied to media data, then audio quality and loudness management are improved, but loudness consistency across different media content deteriorates
Solution Approach 1:
The patent calculates and applies loudness compensation values before dynamic range control and peak limiting operations. By pre-calculating the compensation based on audio metadata and expected processing effects, the system anticipates loudness changes and compensates in advance, ensuring consistent loudness across different media content despite subsequent processing operations
Solution Approach 2:
The patent implements a feedback mechanism where the actual loudness after dynamic range control and peak limiting is measured and compared against the target loudness. The system then adjusts the loudness compensation values for subsequent processing based on this feedback, creating a closed-loop control system that maintains loudness consistency
2Measurement precision
If loudness compensation is performed for both dynamic range control and peak limiting, then loudness equalization accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent divides the loudness compensation process into two separate stages: first calculating compensation for dynamic range control based on audio metadata, then calculating additional compensation for peak limiting based on the output of the first stage. This segmentation allows each compensation calculation to focus on specific processing effects, improving accuracy while maintaining manageable complexity through modular processing
Solution Approach 2:
The patent changes the approach from attempting to calculate a single complex compensation value to using multiple sequential parameter adjustments. By breaking down the compensation into separate parameters for different processing stages and adjusting them sequentially, the system achieves higher overall accuracy while keeping each individual calculation relatively simple
Data Source
AI summary
The present disclosure relates to the field of computer technologies, and discloses an audio processing method and apparatus, an electronic device, and a storage medium. The method includes: obtaining media data to be processed and audio metadata of the media data to be processed; performing first loudness compensation on the media data to be processed based on the audio metadata to obtain first media data, where the first loudness compensation includes loudness compensation for dynamic range control; determining a second loudness compensation value corresponding to peak limiting based on an audio feature of the first media data; and performing second loudness compensation and peak limiting on the first media data based on the second loudness compensation value to determine target media data for playback.