Terminal Audio Volume Adjustment Using Header Gain Extraction
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Solution Overview
Problem
Existing volume adjustment methods for audio files in terminals fail to efficiently and quickly extract representative volume deviations between files, leading to significant sound fluctuations and inconvenience during playback.
Innovation Solution
An apparatus and method that extract a representative volume from individual frame information of an audio file, adjust the master volume by comparing it to a reference volume, and automatically adjust playback to maintain consistent volume levels, using a gain extractor, pre-processor, and volume adjuster to filter errors and apply offsets as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If full decoding is performed on each audio file to extract volume information, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent extracts only the necessary volume information (gain values) from the audio file headers without performing full decoding. The gain extractor specifically targets and extracts gain parameters from header information, separating the essential volume data from the rest of the audio content, thus achieving quick volume comparison without time-consuming complete file decoding
Solution Approach 2:
The patent performs preliminary extraction of gain information from audio file headers before actual playback. By pre-extracting volume characteristics from the header data structure, the system prepares volume comparison data in advance, enabling rapid volume deviation detection when files are queued for playback without requiring full decoding at playback time
2Stability of the object's composition
If automatic volume adjustment is implemented, then sound deviation is reduced, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the volume adjuster continuously monitors the representative volumes of audio files and automatically adjusts playback volume based on detected deviations. The system compares gain information from file headers, detects volume differences, and applies corrective volume adjustments, creating a closed-loop feedback system that maintains consistent playback volume across different audio files
Solution Approach 2:
The system performs self-service volume adjustment by automatically extracting gain information from audio file headers, calculating volume deviations, and adjusting playback parameters without requiring full audio analysis or external intervention. The volume adjuster uses only the header gain data that is already present in the file structure, allowing the system to self-regulate playback volume based on inherent file metadata
Data Source
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AI summary
A method terminal includes an apparatus for automatically adjusting volume in the terminal. An automatic volume adjuster extracts a representative volume from individual frame information of an audio file, and adjusts a master volume by a deviation between the extracted representative volume and a reference volume, and a controller plays the audio file with the master volume adjusted by the automatic volume adjuster.