Battery-Powered Playback Handover for Synchronous Audio
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Solution Overview
Problem
Conventional networked audio systems face challenges in reducing energy consumption, particularly in environments where devices require high power for tasks, making it impractical to 'go green' due to energy efficiency concerns.
Innovation Solution
A playback device within a networked media playback system can transition between operating modes based on its power source, serving as a network bridge when powered externally and as a client device when powered by a battery, thereby conserving power and adapting networking functions accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the playback device serves as a network bridge to enable wireless networking, then network connectivity and functionality are improved, but energy consumption increases
Solution Approach 1:
The playback device dynamically transitions between operating modes (network bridge mode and client device mode) based on power source availability. When AC power is detected, the device operates as a network bridge providing full networking functionality. When battery power is detected, it transitions to client device mode with reduced networking capabilities, thereby adapting functionality to power conditions and reducing energy consumption when battery-powered.
Solution Approach 2:
The system changes operational parameters (networking mode, radio power levels, processing intensity) based on the detected power source. The playback device monitors power source conditions and adjusts its operational state accordingly, switching between high-power network bridge mode and low-power client device mode to optimize the balance between functionality and energy consumption.
2Productivity
If the playback device operates in high-power mode to perform networking tasks, then functionality and performance are improved, but portability and mobility are reduced
Solution Approach 1:
The playback device dynamically adjusts its operational mode based on power source detection. When AC power is available, it operates in high-performance network bridge mode with full networking capabilities. When battery power is detected, it transitions to a more portable client device mode with reduced networking functions, thereby dynamically balancing performance and portability based on power availability rather than physical weight constraints.
3Loss of energy
If the playback device transitions between operating modes based on power source, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The playback device autonomously monitors its own power source conditions and automatically transitions between operating modes without requiring user intervention. The device self-detects whether it is powered by AC or battery, and self-manages the transition between network bridge mode and client device mode, thereby improving energy efficiency while minimizing the perceived complexity for the user.
Data Source
AI summary
Example techniques related to battery-powered playback devices. In an example, a first battery-powered playback device (i) receives audio content from a network device, (ii) forwards the audio content to a second playback device for synchronous playback of the audio content with the second playback device, (iii) plays back the audio content, (iv) detects that a battery level of a battery of the first playback device has fallen below a predefined threshold, and (v) ceases the forwarding of the audio content. After the battery level of the first playback device has fallen below the predefined threshold, the second playback device (i) receives the audio content from the network device, (ii) forwards the audio content to the first playback device for synchronous playback with the first playback device, and (iii) plays back the audio content in synchrony with the first playback device.