Audio Signal Interface Circuit with Dynamic Input Output Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Audio and video signal interfaces, such as HDMI, often fail to receive audio signals or receive signals with no audio, leading to incomplete signal transmission, especially over long distances or with incompatible interfaces like VGA or DVI, resulting in the inability to play audio signals.
Innovation Solution
An audio signal interface circuit with a detection sub-circuit and control sub-circuit that dynamically connects the audio signal interface to either the input or output terminal of a decoder chip based on the presence of audio signals, using control signals and power sources to manage the connection, allowing for both input and output of audio signals through a single interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an audio and video signal interface (such as HDMI) is used to transmit audio and video signals, then the transmission distance and compatibility are improved, but the reliability of audio signal transmission deteriorates when the interface fails to receive audio signals or receives signals with no audio
Solution Approach 1:
The audio signal interface is designed to perform multiple functions: it can receive audio signals from the audio and video signal interface, output audio signals to the audio output terminal, and also receive audio signals from the audio output terminal when the primary interface fails. This multi-functionality ensures continuous audio playback regardless of the primary interface's status.
Solution Approach 2:
The detection circuit continuously monitors the audio signal interface to detect whether audio signals are being received. Based on this feedback, the control circuit automatically switches the audio signal interface between different connection states (connected to audio input terminal or audio output terminal), ensuring reliable audio signal transmission without user intervention.
2Reliability
If separate audio input and output terminals are used, then the audio signal transmission reliability is improved, but the device complexity and the number of interfaces required increase
Solution Approach 1:
A single audio signal interface is designed to serve dual purposes: acting as an audio input terminal when audio signals are received from the audio and video signal interface, and acting as an audio output terminal when audio signals need to be output. This eliminates the need for separate audio input and output terminals, reducing device complexity while maintaining reliability through automatic switching.
Solution Approach 2:
The audio signal interface dynamically changes its function based on real-time signal conditions. The control circuit switches the connection state of the audio signal interface between being connected to the audio input terminal and being connected to the audio output terminal, allowing one interface to adaptively perform multiple roles without requiring permanent separate terminals.
3Ease of operation
If the audio signal interface is permanently connected to the audio input terminal, then the simplicity of connection is improved, but the ability to output audio signals when the primary interface fails deteriorates
Solution Approach 1:
The audio signal interface maintains a simple permanent physical connection to both the audio input terminal and audio output terminal through switching circuitry. The control circuit dynamically changes the logical connection state based on detected signal conditions, allowing the interface to automatically switch between receiving audio signals and outputting audio signals without requiring manual reconfiguration or complex user operations.
Solution Approach 2:
The system automatically detects the status of the audio and video signal interface and self-manages the switching of the audio signal interface between input and output modes without user intervention. The detection circuit monitors signal presence, and the control circuit autonomously switches connections, making the system self-sufficient and maintaining operational simplicity.
Data Source
AI summary
The present disclosure provides an audio signal interface circuit, and a control method, apparatus and terminal thereof, in the technical field of electronic technologies. The audio signal interface circuit includes a detection sub-circuit and a control sub-circuit. The detection sub-circuit may control, under control of a control signal, the control sub-circuit, to enable an audio signal interface to be communicated with an audio signal input terminal or an audio signal output terminal of a decoder chip. That is, the audio signal interface circuit enables the audio signal interface to not only implement input of audio signals, but also implement output of audio signals.