Dual Audio-Link Decoder for Latency and Robustness Trade-off
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Solution Overview
Problem
Current decoder equipment faces conflicting latency constraints between large buffer sizes for wireless audio playback devices, which enhance robustness but increase latency, and the need for low latency audio feedback to confirm user actions promptly, especially for visually impaired users.
Innovation Solution
A decoding system with separate audio links for multimedia sound and audio feedback, where the multimedia sound link has a higher latency for robust wireless transmission and the audio feedback link has a lower latency for quick user interaction, allowing distinct processing and transmission characteristics for each.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large buffer is used in wireless audio playback devices to enhance robustness against interference, then transmission reliability is improved, but latency between receiving audio/video input stream and emitting sound increases
Solution Approach 1:
The patent segments the audio signal transmission into two separate audio links: a first audio link for multimedia sound with higher latency tolerance, and a second audio link for audio feedback with lower latency requirements. This segmentation allows each link to be optimized independently - the first link can use larger buffers for robustness while the second link maintains low latency for timely user feedback.
2Speed
If audio feedback is transmitted with low latency to confirm user actions promptly, then user interaction responsiveness is improved, but transmission robustness against wireless interference deteriorates
Solution Approach 1:
The patent creates a dedicated second audio link specifically for audio feedback signals, separating it from the first audio link for multimedia content. This dedicated link can be optimized for low latency performance without compromising robustness, as it carries only critical feedback signals rather than continuous audio streams.
Solution Approach 2:
The patent applies different quality characteristics to different audio links - the first audio link uses characteristics suitable for robust wireless transmission of multimedia audio, while the second audio link uses characteristics optimized for low latency feedback transmission. This local quality differentiation allows each link to be tuned for its specific functional requirements.
Data Source
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AI summary
The invention relates to a decoding equipment (11) comprising: - a first output that can be connected to an audio playback equipment (15), - a second output that can be connected to a video playback equipment (13), - processing means configured to transmit via a first audio link (17) from the first output a first audio signal from an audio/video input stream received by the decoding equipment and, via a second audio link (16), a second audio signal linked to at least one sound generated by the decoding equipment, the first link having first characteristics giving the first audio signal a first latency and the second link having second characteristics giving the second audio signal a second latency lower than the first latency.