Audio-Visual Interface Switching Circuit System
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Solution Overview
Problem
Current audio-visual playback systems experience delays when switching between interfaces due to the need to re-establish data transmission channels, affecting user experience and increasing power consumption.
Innovation Solution
A method and circuit system that utilize a shared receiving circuit and status and control data channel control module to continuously respond to audio-visual sources, allowing for continuous FRL signal issuance and detection, thereby minimizing the time required to switch between interfaces and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the sink device powers off power domains for non-operational audio-visual interfaces to reduce power consumption, then power consumption is reduced, but link training process cannot be completed and FRL signals cannot be issued
Solution Approach 1:
The patent divides the audio-visual interface into operational and non-operational states. The status and control data channel is segmented from the main audio-visual signal transmission path, allowing it to remain functional while power domains are turned off. This enables the sink device to maintain minimal connectivity for status monitoring without requiring full power to complete link training processes for all interfaces.
Solution Approach 2:
The patent implements preliminary action by having the status and control data channel continuously respond to polling requests before the main audio-visual content transmission begins. This allows the system to pre-establish communication protocols and detect FRL signals in advance, so when switching occurs, the link training process can be accelerated or skipped entirely.
2Loss of time
If the sink device continuously responds to polling requests from audio-visual sources to maintain data transmission channels, then switching time is reduced, but power consumption increases
Solution Approach 1:
The patent applies local quality by making the response behavior different for different channels. The status and control data channel continuously responds to polling requests to maintain readiness for quick switching. In contrast, the main audio-visual signal transmission path powers down completely when not in use. This localized continuous operation only where needed resolves the contradiction between fast switching and power consumption.
Solution Approach 2:
The status and control data channel acts as an intermediary between the audio-visual source and the main data transmission path. It continuously communicates device status and receives polling requests, serving as a mediator that enables quick switching decisions without requiring the main power-intensive transmission path to be continuously active.
3Adaptability or versatility
If multiple audio-visual interfaces are equipped with independent power domains to enable independent operation, then interface versatility is improved, but device complexity increases
Solution Approach 1:
The patent merges the status and control data channel functionality across multiple audio-visual interfaces into a shared communication pathway. Instead of each interface having completely independent power domains and control circuits, the status and control data channel is shared, reducing the number of independent power management circuits while maintaining the ability to independently control each interface's main power domain.
Data Source
AI summary
A method for switching audio-visual interfaces and a circuit system are provided. The circuit system is disposed in a sink device. A protocol layer circuit of each of audio-visual interfaces in the sink device includes a status and control data channel control module, which is used to respond to the signals sent by the video sources continuously when the sink device is connected with audio-visual sources via the audio-visual interfaces. The multiple video sources can accordingly send FRL (fixed rate link) signals to the sink device in response to responses made by the sink device. The protocol layer circuit includes an FRL audio-visual packet detection module that starts to detect a rate of an FRL and resolve audio-visual packets for obtaining audio-visual data for the audio-visual interface that the sink device switches to.