Wireless Speaker Playback Delay Detection for Complete Audio Output
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Solution Overview
Problem
Vehicle computing devices often fail to render initial portions of audio data transmitted by smartphones via vehicle speakers, leading to incomplete audio playback and resource wastage, especially when the vehicle computing device is not in the appropriate mode.
Innovation Solution
Determining the audio delay between a computing device and vehicle speakers, appending a corresponding delay audio segment to future audio streams, and using this delay to adapt noise reduction techniques, ensuring that audio data is properly rendered and perceived by the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If audio data is transmitted to vehicle speakers, then audio output is provided to the user, but initial portions of the audio data fail to render due to delay in initiating components
Solution Approach 1:
The system performs preliminary actions by detecting the invocation of an automated assistant before audio data is generated. It proactively determines whether vehicle speakers will be available and prepares accordingly by routing audio through alternative paths (vehicle interface device speakers) if vehicle speakers are unavailable, preventing the delay problem before it occurs.
Solution Approach 2:
The vehicle interface device serves as an intermediary between the automated assistant and the audio output system. It receives audio data from the automated assistant and can route it to either vehicle speakers or its own speakers, acting as a mediator that resolves the conflict between audio playback completeness and timing delays.
2Reliability
If audio data is transmitted to vehicle speakers, then audio output is provided, but computational resources are wasted when audio fails to render
Solution Approach 1:
The system implements feedback by monitoring whether vehicle speakers are available and whether audio data is successfully rendered. Based on this feedback, it dynamically adjusts audio routing decisions, transmitting audio to vehicle speakers only when availability is confirmed, thereby avoiding wasted computational resources while ensuring reliable audio rendering.
Solution Approach 2:
The audio routing system is dynamic rather than static. It continuously adapts its behavior based on the availability state of vehicle speakers, switching between different audio output paths as conditions change. This dynamic adaptation ensures computational resources are used efficiently while maintaining reliable audio playback.
3Productivity
If the vehicle computing device is not in the appropriate mode, then audio data transmission is initiated, but audio data fails to render via vehicle speakers
Solution Approach 1:
The system performs preliminary checks to determine the availability of vehicle speakers before transmitting audio data. By proactively assessing whether the vehicle computing device is in the appropriate mode and whether speakers are available, it prevents futile audio transmissions and ensures productivity is maintained while preserving playback reliability.
Solution Approach 2:
The vehicle interface device acts as an intermediary that buffers and manages audio data transmission. It monitors the state of vehicle speakers and controls the flow of audio data, preventing transmission when speakers are unavailable and ensuring reliable playback when they are available, thus resolving the contradiction between transmission efficiency and playback reliability.
Data Source
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.