Audio Data Processing Device Synchronizing Wireless Subwoofer Timing
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Solution Overview
Problem
In multi-channel surround sound systems, the timing gap between audio data transmitted through different channels via wired and wireless connections causes listener discomfort due to delayed sound emission from subwoofers, especially when the number of channels increases or when speakers are connected wirelessly to an AV amplifier.
Innovation Solution
An audio data processing device with input units for receiving audio data, a mixing unit, output units for speakers, processors for adding acoustic effects, and delay units to synchronize the timing of audio data output to speakers, ensuring that the timing relationship between channels is maintained, regardless of transmission speeds and paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If audio data is transmitted to the subwoofer via wireless connection to allow flexible placement, then ease of operation and adaptability are improved, but transmission speed decreases causing timing gap between channels
Solution Approach 1:
The patent applies preliminary action by adding delay to the wired main speakers' audio data before transmission, rather than waiting to compensate for the wireless subwoofer's slower transmission. This anticipates the timing mismatch by pre-synchronizing all channels to the slowest transmission path, eliminating the need for post-transmission timing adjustment and ensuring all speakers emit sound simultaneously.
2Reliability
If delay is added to main speakers to eliminate timing gap, then synchronization between channels is improved, but overall time delay from audio data output to sound emission increases
Solution Approach 1:
The patent applies local quality by applying delay processing selectively only to the main speakers' audio data transmission path, while leaving the subwoofer's wireless transmission path unchanged. This localized intervention synchronizes the faster wired path with the slower wireless path without adding unnecessary delay to the entire system, minimizing overall time loss while achieving channel synchronization.
3Reliability
If the number of channels in surround sound system increases to create more natural sound field, then sound field quality is improved, but complexity of transmission path management and timing synchronization increases
Solution Approach 1:
The patent applies segmentation by dividing the multi-channel audio transmission into two independent groups: wired main speakers and wireless subwoofer. Each group is managed separately with its own delay processing, allowing the system to scale to more channels without increasing overall complexity. This modular approach simplifies timing synchronization in complex multi-channel systems by treating different transmission paths as independent units.
Data Source
AI summary
An audio data processing device includes a mixing unit that mixes first audio data and second audio data to generate mixed audio data, a first output unit that outputs, to a first speaker, audio data not having undergone the mixing, a second output unit that outputs, to a second speaker, the mixed audio data generated by the mixing unit, a processor which is provided between a point of branching to the mixing unit and the first output unit or between the mixing unit and the second output unit and adds an acoustic effect, and a delay unit which is provided between the branching point and the first output unit or between the mixing unit and the second output unit and delays the audio data so that a relationship of timing between input, to the first speaker, of the audio data output from the first output unit and input, to the second speaker, of the audio data output from the second output unit coincides with a relationship of timing of input between the first audio data and the second audio data.