Wireless Audio Transmission Using Asymmetric Isochronous Streams
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Solution Overview
Problem
Existing wireless gaming audio systems face challenges in meeting different time delay requirements in bidirectional communication directions due to the need for symmetric time delays in Bluetooth Low Energy (BLE) audio applications, leading to implementation difficulties and audio data loss.
Innovation Solution
A wireless audio data transmission method and device that utilize asymmetric isochronous streams (ABIS) with different time lengths for communication links, allowing time domain position overlap to accommodate varying time delay needs, enabling efficient time-sharing of time slots for audio packet transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the CIG link parameters are configured based on the time delay requirement in the headphone direction, then the time delay requirement in the headphone direction is met, but the implementation difficulty increases excessively and audio data loss occurs
Solution Approach 1:
The patent applies asymmetry by configuring different time delay parameters for the two communication directions. Specifically, it sets a first time delay parameter for the microphone direction and a second time delay parameter for the headphone direction, where these parameters can be different. This allows each direction to be optimized independently according to its specific requirements, resolving the contradiction between meeting the headphone delay requirement and preventing audio data loss.
Solution Approach 2:
The patent implements local quality by allowing different quality parameters (time delay settings) for different communication directions. The system configures timing parameters locally for each direction based on its specific needs, rather than applying a uniform setting globally. This enables the headphone direction to have its delay requirement met while the microphone direction maintains its own optimal settings, preventing audio data loss.
2Ease of manufacture
If the CIG link parameters are configured based on the time delay requirement in the microphone direction, then the implementation is simplified, but the time delay requirement in the headphone direction cannot be met
Solution Approach 1:
The patent resolves this contradiction by introducing asymmetric parameter configuration for the two communication directions. Instead of using a single unified parameter set that would be easy to implement but fail to meet headphone delay requirements, the system employs direction-specific time delay parameters. This asymmetric approach maintains implementation simplicity while satisfying the stricter headphone direction requirements.
Solution Approach 2:
The patent applies local quality by configuring timing parameters independently for each communication direction based on its specific requirements. The system allows the headphone direction to have optimized timing parameters that meet its strict delay requirements, while the microphone direction can use different parameters that are easier to implement, thus resolving the contradiction between ease of implementation and meeting delay requirements.
3Device complexity
If symmetric time delays are used in bidirectional communication, then the communication protocol is simplified, but the different time delay requirements of the wireless gaming audio system in different communication directions cannot be met
Solution Approach 1:
The patent directly addresses this contradiction by implementing asymmetric time delay parameters for the two communication directions. The system configures a first time delay parameter for microphone communication and a second time delay parameter for headphone communication, allowing each direction to be optimized independently. This asymmetric configuration increases protocol complexity slightly but enables the system to meet different time delay requirements for different directions, which is critical for wireless gaming audio performance.
Solution Approach 2:
The patent applies local quality by allowing different quality parameters (time delay settings) for different communication directions. The system configures timing parameters locally for each direction based on its specific needs, rather than applying a uniform setting globally. This enables the headphone direction to have its delay requirement met while the microphone direction maintains its own optimal settings, resolving the contradiction between protocol simplicity and adaptability to different requirements.
Data Source
AI summary
Wireless audio data transmission method and related device are described. The method is applied to a master device. The master device transmits a first audio packet to a slave device within consecutive first isochronous intervals based on a first communication link, and/or receives a second audio packet transmitted by the slave device within consecutive second isochronous intervals based on a second communication link. A time length of the first isochronous interval is less than that of the second isochronous interval. The first isochronous interval comprises a first time slot for transmitting the first audio packet and a second time slot being a time slot other than the first time slot within each first isochronous interval. The second isochronous interval comprises a third time slot for transmitting the second audio packet. A time domain position of the third time slot within one of the second isochronous intervals at least partially overlaps with a time domain position of one second time slot in the consecutive first isochronous intervals.


