Mobile Terminal Playback Synchronization for Seamless Audio Continuity
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Solution Overview
Problem
There is no effective configuration for smoothly associating a mobile terminal and an in-vehicle device regarding music playback continuity when a user gets in or out of a vehicle, leading to discomfort due to 'earworm' effects where music playback is not seamlessly continued across devices.
Innovation Solution
The mobile terminal automatically synchronizes music playback with the in-vehicle device by using an interruption detection unit to measure the time when the earphone is removed and resumes playback from the car audio from a position advanced by the interruption time period if within a threshold, ensuring continuity and user comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If music playback is automatically continued from the interrupted position when switching between mobile terminal and in-vehicle device, then user comfort is improved, but device complexity increases
Solution Approach 1:
The mobile terminal predicts the user's intention to switch to in-vehicle playback before the actual switch occurs. By detecting earphone removal and calculating interruption time period, the system proactively prepares the playback position advancement, so that when the user connects to the in-vehicle device, the music automatically continues from the predicted position without requiring user input or complex real-time coordination protocols.
2Reliability
If the system measures and responds to earphone removal events to advance playback position, then playback continuity is improved, but measurement precision requirements increase
Solution Approach 1:
The system applies a threshold time period to filter interruption events. Only interruptions exceeding this threshold are considered valid for playback position advancement. This partial action approach prevents over-responsiveness to brief earphone removals (like when adjusting fit) while still capturing genuine interruptions, thereby maintaining playback continuity reliability without requiring millisecond-level measurement precision.
Data Source
AI summary
The mobile terminal includes a playback signal generation unit that generates a playback signal for playing back a music and outputs the playback signal to a first sound output unit; an interruption detection unit that detects interruption of an output of the sound from the first sound output unit during the playback of the music; an output detection unit that detects that the sound from a second sound output unit can be output; and a time measurement unit that measures a time period after interruption is detected until it is detected by the output detection unit that the output is possible. The playback signal generation unit outputs a playback signal for playing back the music from a playback position advanced forward from a playback position, in which the interruption has been detected, in correspondence to the time period measured by the time measurement unit.