Multi-Terminal Audio Playback Spatial Surround Effect
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Solution Overview
Problem
Current multi-terminal audio playback systems fail to effectively enhance the spatial surround effect of audio files, leading to a less immersive listening experience due to the way sub-channel files are handled and distributed among terminals.
Innovation Solution
A method and system where terminals obtain and process audio files with left and right channel signals to generate central and surround channel signals, simulating a virtual sound source's location and sound field, and superpose these signals to create a more immersive audio experience by coordinating the playback across multiple terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a preset sub-channel file is played in a mobile phone using conventional multi-terminal cooperative playback, then the audio file can be cooperatively played across multiple terminals, but the spatial surround effect brought to the user is not strong
Solution Approach 1:
The audio signal frame is segmented into left channel signal and right channel signal. The terminal further processes these to obtain separate central channel signal and surround channel signal, enabling spatial distribution of audio components across multiple terminals to create surround effect
Solution Approach 2:
The patent introduces spatial dimension by obtaining current location of virtual sound source and generating sound channel signals that simulate current sound field. This transforms conventional 2D stereo playback into 3D spatial audio experience across multiple terminals
2Reliability
If multiple terminals play different sub-channel files to improve playback effect, then the audio playback quality is enhanced, but the system complexity increases due to coordination requirements
Solution Approach 1:
The patent merges the audio processing functions into a unified framework where terminals obtain audio files, process them through standardized channels (L/C/R/S), and coordinate playback. This integration simplifies the system architecture while maintaining high audio quality across multiple terminals
3Power
If multiple terminals play the entire audio file to increase playback volume, then the play volume is increased, but the spatial surround effect is not achieved
Solution Approach 1:
Instead of playing the entire audio file on all terminals, the patent segments the audio into different channel signals (central and surround) that are distributed to appropriate terminals. This enables both volume increase through multi-terminal playback and spatial surround effect through channel-specific assignment
Solution Approach 2:
Different terminals are assigned different channel signals based on their spatial position and capabilities. Some terminals play central channel while others play surround channels, creating localized audio quality that contributes to overall spatial surround effect
Data Source
AI summary
A method and a terminal for playing an audio file in a multi-terminal cooperative manner include obtaining, by a source terminal, an audio signal frame, the audio signal frame includes a left channel signal and a right channel signal, obtaining, by the source terminal, a central channel signal and a surround channel signal based on the left channel signal and the right channel signal, obtaining, by the source terminal, a current location of a virtual sound source corresponding to the central channel signal, and generating, based on the current location and the central channel signal, a sound channel signal corresponding to the terminal in at least two sound channel signals, superposing, by the source terminal, the sound channel signal on the surround channel signal, to obtain a to-be-played sound channel signal corresponding to the terminal, and playing, by the source terminal, the to-be-played sound channel signal.