Wireless Speaker Playback Detection Using Structured Audio Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle computing devices often fail to render initial portions of audio data transmitted by mobile devices due to delays or being in the wrong mode, leading to incomplete audio playback and wasteful retransmissions, particularly in vehicle environments.
Innovation Solution
Determine the audio delay between a computing device and vehicle speakers, append a delay audio segment to the audio stream, and adapt noise reduction techniques to ensure complete audio rendering and efficient transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If audio data is transmitted to vehicle speakers, then audio playback is achieved, but initial portions of audio data are lost due to delay
Solution Approach 1:
The system performs preliminary actions by detecting the audio delay between the computing device and vehicle speakers before transmitting audio data. Based on this detected delay, the system pre-adjusts the audio stream by skipping the corresponding number of initial audio frames, ensuring that the transmitted audio data aligns properly with the speakers' playback timing and prevents loss of critical initial audio information.
2Reliability
If audio data is retransmitted to ensure completeness, then audio playback completeness is improved, but computational resources are wasted
Solution Approach 1:
The system implements feedback by detecting the actual audio delay between the computing device and vehicle speakers, using this feedback information to dynamically adjust the audio stream transmission parameters. This closed-loop approach ensures audio completeness without requiring wasteful retransmissions, as the initial transmission is optimized based on the detected delay characteristics.
3Measurement precision
If noise reduction is applied to captured audio, then speech recognition accuracy is improved, but audio delay causes inaccurate noise cancellation
Solution Approach 1:
The system performs preliminary detection of the audio delay between captured audio and rendered audio before applying noise reduction algorithms. Using this pre-detected delay information, the system adjusts the timing alignment of audio frames, ensuring that noise cancellation operates on properly synchronized audio data, which significantly improves speech recognition accuracy.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Implementations are directed to determining an audio delay, of a computing device, by causing an audio data stream to be transmitted to the computing device via a wireless communication channel. The computing device causes audio output generated using the audio data stream to be rendered via speaker(s). The rendered audio output is captured via microphone(s), and the audio delay determined by comparing the captured audio output with the audio data stream. A delay audio segment can be appended to an additional audio data stream transmitted to the computing device, where the length of the delay audio segment is determined using the audio delay. A noise reduction technique can additionally or alternatively be adapted based on the audio delay. Implementations are additionally or alternatively directed to determining if an audio data stream transmitted to a computing device for rendering through speaker(s) driven by the computing device - is actually being rendered.