Audio Synchronization During Wireless Handover
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Solution Overview
Problem
During handover procedures in wireless audio communications, synchronizing audio data between Bluetooth devices can be challenging, leading to noticeable glitches due to delays in buffering and transmitting microphone data, which disrupts voice calls.
Innovation Solution
Implementing a method that includes initiating a handover interval with extended synchronous connection-oriented (eSCO) windows, buffering audio data packets, discarding older packets, and transmitting them only after a handover indication is received, ensuring seamless audio synchronization without blackouts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the new primary wireless audio device buffers audio data packets before transmission, then audio synchronization is improved, but transmission delay increases causing noticeable glitches
Solution Approach 1:
The new primary wireless audio device performs preliminary buffering of audio data packets during the handover interval before actually transmitting them. This advance preparation ensures that when transmission begins, synchronized audio data is already available, eliminating both the synchronization problem and the perceived delay.
Solution Approach 2:
The transmission process is segmented into distinct phases: a handover interval for buffering and preparation, followed by a transmission phase. By dividing the process into segments with different functions, the system can prepare data without creating continuous transmission delays.
2Productivity
If the handover procedure is completed quickly, then transmission speed is improved, but audio synchronization deteriorates causing glitches
Solution Approach 1:
Audio data buffering is performed in advance during the handover interval, so that when the handover completes quickly, synchronized audio data is already ready for immediate transmission, maintaining both speed and synchronization.
Solution Approach 2:
The buffering action continues throughout the handover interval, ensuring that audio data preparation is ongoing and ready, which maintains continuous useful action without interruption despite the quick handover transition.
3Speed
If audio data packets are transmitted immediately upon handover, then transmission speed is improved, but audio quality deteriorates due to lack of synchronization
Solution Approach 1:
Audio data is buffered in advance during the handover interval before transmission begins. This preliminary action ensures that when transmission starts at full speed, synchronized high-quality audio data is already available, achieving both speed and quality.
Solution Approach 2:
The system creates a cushion of pre-buffered audio data during the handover interval, which protects against synchronization issues during immediate transmission. This beforehand cushioning ensures quality is maintained even as transmission speed increases.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for initiating, at a first wireless audio device, a handover interval including one or more extended synchronous connection-oriented (eSCO) windows, buffering a set of one or more audio (e.g., microphone) data packets during the handover interval, discarding at least a portion of the set of one or more audio data packets during the handover interval, receiving a handover indication from a second wireless audio device during an extended retransmission portion of a first eSCO window of the handover interval, and transmitting one or more audio data packets during a second eSCO window that is subsequent to the handover interval.