Wireless Audio Distribution Timing Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless audio distribution systems face challenges in maintaining high-quality, low-latency, multichannel audio transmission, particularly in environments requiring synchronized audio and video, as they often result in noticeable delays and reduced audio quality due to limitations in radio technologies used.
Innovation Solution
A multichannel wireless digital audio distribution system that synchronizes audio data output by including timing markers in data packets, allowing receivers to select and decode specific channels, and using high-volume commodity radio components to achieve low latency and phase coherency, capable of supporting up to 16 channels with 24 bits per sample at 48,000 samples per second.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional wireless radio technologies (FM, basic spread spectrum) are used for audio distribution, then wireless simplicity and ease of deployment are achieved, but audio quality is reduced due to fewer bits per sample and lower dynamic range
Solution Approach 1:
The system changes the transmission parameters by using high-volume commodity radio components capable of transmitting high-bitrate audio data. The patent implements 16 channels at 24 bits per sample and 48,000 samples per second, fundamentally altering the data rate and bit depth parameters to achieve high audio quality over wireless transmission.
2Manufacturing precision
If high-bitrate, multichannel audio is transmitted wirelessly, then audio quality and channel capacity are improved, but latency increases and channel-to-channel phase coherency is compromised
Solution Approach 1:
The system performs preliminary timing synchronization by embedding timing markers in each data packet before transmission. Receivers use these pre-placed timing markers to synchronize their playback clocks with the transmitter, establishing a fixed latency relationship before audio playback begins. This preliminary clock alignment ensures that even with high-bitrate multichannel transmission, all channels remain phase-coherent and latency remains constant and predictable.
3Adaptability or versatility
If multiple audio channels are distributed wirelessly, then audio versatility and system capability are improved, but device complexity increases due to synchronization requirements
Solution Approach 1:
The system uses universal timing markers embedded in data packets that serve multiple functions: they synchronize playback clocks across all channels, provide phase alignment information, and enable receivers to lock onto a common timing reference. This single multi-functional mechanism allows 8-32 channels to be distributed wirelessly without requiring separate synchronization protocols for each channel, reducing overall system complexity.
4Loss of time
If fixed low latency is maintained in wireless audio transmission, then audio synchronization with video and real-time response are improved, but transmission reliability and error correction become more difficult to maintain
Solution Approach 1:
The system implements feedback through timing markers that are embedded in each transmitted data packet. These markers provide continuous feedback about the actual transmission time and timing deviations to the receiver. The receiver uses this feedback to adjust its playback clock and maintain precise synchronization, allowing the system to compensate for wireless transmission variations while maintaining fixed low latency and high reliability simultaneously.
Data Source
AI summary
A multichannel wireless digital audio distribution system provides for the synchronization of the output of audio data by different receiving units set to output audio data for receiver unit assigned channels. The transmitter includes parallel data respectively representing a plurality of audio data channels in each data packet. The data packets are broadcast wirelessly with known, predetermined packets including a timing marker. Each receiver unit receives the broadcast data packets and selects the parallel data respectively representing the receiver unit assigned audio data channel. The receiver unit outputs the selected data synchronized to the receipt of the timing marker by the receiving unit.