Wireless Earbud Audio Inversion for Packet Loss Call Consistency
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Solution Overview
Problem
Existing wireless earbuds experience poor call quality due to packet loss during Bluetooth connectivity, leading to noticeable differences in speech signals between the two earbuds, causing discomfort for users as they hear 'pop sounds' due to differing speech signals processed by each earbud using packet loss concealment techniques.
Innovation Solution
Incorporating an inverter on the downlink speech process path of one wireless earbud to generate inverted speech data, while the other earbud does not, ensuring consistent speech signals are played to both ears, thereby eliminating the discomfort caused by packet loss concealment algorithm differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet loss concealment techniques are implemented in both wireless earbuds to handle lost packets, then the effects of packet loss are masked, but the speech signals become different between left and right earbuds causing pop sounds and poor user experience
Solution Approach 1:
The patent applies asymmetry by implementing packet loss concealment in only one wireless earbud (either left or right) while leaving the other earbud without this function. This asymmetric configuration ensures that when packet loss occurs, only one earbud generates concealed speech signals, while the other plays the original received signals, thereby maintaining consistency between both ears and eliminating the pop sounds that would otherwise occur due to asymmetric signal processing in both earbuds.
2Reliability
If speech signals are processed differently in left and right wireless earbuds to handle packet loss, then packet loss effects are reduced, but the consistency of speech signals between both ears is compromised
Solution Approach 1:
The patent implements asymmetry by configuring one wireless earbud with packet loss concealment functionality while the other earbud processes signals without this function. This asymmetric design ensures that speech signal consistency is maintained between both ears during normal operation, while still providing packet loss protection through the single earbud equipped with concealment capabilities, thus resolving the contradiction between reliability and signal consistency.
Data Source
AI summary
The invention relates to apparatuses and methods for enhancing call quality in wireless earbuds. A first wireless earbud includes a first speaker and a first downlink speech process path, and a second wireless earbud includes a second speaker and a second downlink speech process path. The first and the second downlink speech process paths receive the same mono speech data from a mobile phone, and process the mono speech data to generate first and second analog signals, respectively, so that the first and the second speakers play the first and second analog signals, respectively. An inverter is disposed on the first downlink speech process path to generate the inverted digital data or analog signal from received digital data or analog signal corresponding to the mono speech data, but no inverter is disposed on the second downlink speech process path.