Dual-Spectrum Audio Networking for Low-Latency Zone Playback
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Solution Overview
Problem
Existing audio systems struggle to provide synchronized, low-latency audio playback across multiple listening zones without audible echoes or glitches, particularly in home theater environments where video and audio synchronization is critical.
Innovation Solution
A system comprising zone players and controllers that utilize a peer-to-peer network with dual wireless spectra (2.4 GHz and 5 GHz) for low-latency audio transmission, enabling synchronized playback across multiple zones with rapid connection restoration in case of dropouts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If audio is transmitted across multiple listening zones using wireless networks, then accessibility and convenience are improved, but latency increases causing audible delays between video and audio
Solution Approach 1:
The system segments audio transmission by designating specific zone players as primary (receiving audio directly from the source) and others as satellite (receiving audio via peer-to-peer wireless connection from primary players). This segmentation allows satellite players to bypass the source device and receive audio directly from nearby primary players, reducing latency while maintaining multi-zone accessibility.
Solution Approach 2:
Primary zone players act as intermediaries between the audio source and satellite zone players. The primary player receives audio from the source device and simultaneously transmits it via wireless peer-to-peer connection to satellite players in other zones, enabling low-latency audio distribution without requiring satellite players to connect directly to the source device.
2Adaptability or versatility
If audio is transmitted across multiple zones simultaneously, then multi-zone playback capability is improved, but synchronization accuracy deteriorates causing audible echoes and glitches
Solution Approach 1:
The system segments the audio distribution network into primary and satellite zone players, where each satellite player connects wirelessly to a specific primary player. This segmentation enables independent audio streams to different zones while maintaining precise synchronization within each zone, as satellite players receive audio directly from their designated primary player rather than through a centralized bottleneck.
Solution Approach 2:
The system implements local quality optimization by allowing satellite zone players to receive audio directly from nearby primary players via peer-to-peer wireless connections. This local transmission path provides higher bandwidth and more precise timing control for each zone pair, improving synchronization accuracy while maintaining multi-zone versatility.
3Loss of time
If wireless peer-to-peer connections are used for audio transmission, then latency is reduced, but connection stability worsens making the system vulnerable to dropouts and interference
Solution Approach 1:
The system prepares for potential connection failures by implementing rapid connection restoration protocols. When a wireless peer-to-peer connection between a primary and satellite player is lost, the system quickly reestablishes the connection or redirects audio through alternative paths, cushioning against the impact of connection dropouts and maintaining audio continuity.
Solution Approach 2:
The system employs feedback mechanisms to monitor the health and stability of wireless peer-to-peer connections. By continuously assessing connection quality metrics, the system can detect degradation early and take corrective actions such as switching to alternative transmission paths or adjusting transmission parameters, thereby maintaining reliability despite the inherent instability of wireless connections.
Data Source
AI summary
Low-latency audio networking is disclosed. In one embodiment, an example playback device includes a processor and memory having stored thereon instructions executable by the processor. The example instructions are to cause the first playback device to perform functions comprising: receiving audio information; selecting a first frequency channel of a first spectrum based on a threshold latency associated with the audio information; transmitting to the second playback device via a second frequency channel of a second spectrum, control information that identifies the first frequency channel of the first spectrum; and transmitting to the second playback device via the first frequency channel of the first spectrum, the audio information to be played by the second playback device.