Dynamic Audio Channel Mapping for Mobile Terminal Screen Rotation
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Solution Overview
Problem
During multimedia file playback on mobile terminals, changes in spatial attitude lead to a mismatch between audio and video information, as audio output by dual speakers remains fixed, causing incorrect audio channels to be played by the left and right speakers.
Innovation Solution
An audio playback method and apparatus that acquires spatial attitude information using sensors and controls audio content distribution among multiple speakers to ensure that the left speaker plays the left audio channel and the right speaker plays the right audio channel, even during screen rotation, thereby maintaining synchronization with video information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If dual speakers are used with fixed audio channel assignment, then the device complexity is reduced and ease of operation is improved, but the adaptability to spatial attitude changes deteriorates, causing audio-video mismatch
Solution Approach 1:
The patent implements dynamic audio channel assignment by detecting spatial attitude changes through sensors and dynamically switching which physical speaker corresponds to which audio channel. This transforms the static fixed assignment into a dynamic adaptive system that maintains audio-video synchronization regardless of device orientation.
Solution Approach 2:
The system uses sensor feedback to detect spatial attitude changes and uses this information to adjust audio channel mapping. The feedback loop ensures that the audio output continuously adapts to maintain proper synchronization with video content based on real-time device orientation data.
2Device complexity
If audio channel assignment is fixed regardless of spatial attitude, then the device complexity is reduced, but the reliability of audio-video synchronization deteriorates
Solution Approach 1:
The system dynamically adjusts audio channel assignment based on detected spatial attitude changes, ensuring reliable audio-video synchronization. The complexity is managed by using standard sensor APIs and existing audio processing frameworks, making the dynamic adaptation feasible without excessive system complexity.
Solution Approach 2:
By implementing a feedback mechanism that continuously monitors spatial attitude and adjusts audio channel mapping accordingly, the system maintains high reliability of audio-video synchronization. The feedback loop ensures that any orientation changes are compensated for in real-time.
3Adaptability or versatility
If the mobile terminal rotates screen, then the adaptability to different viewing orientations is improved, but the audio information output becomes mismatched with video information, deteriorating the quality of audio playback
Solution Approach 1:
The patent dynamically remaps audio channels based on screen rotation and spatial attitude detection. When the device rotates, the system detects the change and swaps or redirects audio signals to maintain the correct correspondence between audio channels and the physical speaker positions relative to the displayed video content.
Solution Approach 2:
The system uses sensor feedback to detect screen rotation and uses this information to adjust audio channel mapping in real-time, ensuring precise audio-channel correspondence is maintained even during rotation. This feedback mechanism preserves playback quality while enabling rotational adaptability.
Data Source
AI summary
Embodiments of the present invention provide an audio playback method and apparatus. The embodiments of the present invention provide an audio playback method, applied to a mobile terminal that has a spatial attitude sensor, where the mobile terminal includes at least three speakers, and the at least three speakers are not in a same straight line, where the method includes: when screen rotation is performed on the mobile terminal, acquiring spatial attitude information; and controlling, according to the spatial attitude information, audio content played by each speaker, so that a speaker located on the left of currently played video information plays a left audio channel, and a speaker located on the right of the currently played video information plays a right audio channel. The audio playback method and apparatus provided in the embodiments of the present invention can be applied to the mobile terminal having the spatial attitude sensor.