Audio Controller Initialization Mode for HDMI ARC Latency
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Solution Overview
Problem
Conventional home theater systems experience delays in initializing and outputting audio signals via HDMI ARC or optical/coaxial cables, which prolongs the boot time of the main CPU and decoder, affecting the recognition of the CEC module and input mode.
Innovation Solution
An audio processing apparatus and method that determines an initialization mode to prioritize either video or audio signal processing, allowing for faster initialization by controlling GPIO terminals to set modes such as HDMI ARC or optical/coaxial input, enabling quicker audio signal processing and output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the conventional initialization process is used where video signal is processed prior to audio signal, then the system maintains standard initialization sequence, but the audio output time is delayed
Solution Approach 1:
The patent applies preliminary action by detecting the input mode (HDMI ARC, optical, coaxial) before the standard initialization process and pre-configuring the audio processor accordingly. This allows the audio processor to be activated and initialized in advance, so that when the initialization command is given, the audio processing is already ready or nearly ready, significantly reducing the audio output delay while maintaining system stability
Solution Approach 2:
The patent implements dynamics by making the initialization process adaptive based on the detected input mode. The system dynamically adjusts the initialization sequence: for HDMI ARC input, the audio processor is activated first; for optical/coaxial input, the audio processor is activated simultaneously with the main CPU. This dynamic adjustment optimizes audio output speed for different connection types without affecting other system functions
2Productivity
If the audio processor is activated simultaneously with the main CPU, then the initialization process is simplified, but the audio signal processing may conflict with video signal processing
Solution Approach 1:
The controller performs preliminary detection of the input mode before simultaneous activation of the main CPU and audio processor. Based on this detection, the controller pre-configures the audio processor's operating parameters and initializes necessary registers in advance. This preliminary preparation ensures that when simultaneous activation occurs, both processors are ready to work together without conflicts, maintaining signal processing stability while achieving fast initialization
Solution Approach 2:
The system employs feedback mechanisms where the controller continuously monitors the initialization status of both the main CPU and audio processor. During simultaneous activation, the controller receives status feedback from both processors and dynamically adjusts their operation to prevent conflicts. If conflicts are detected, the controller can pause one processor until the other completes its critical initialization tasks, ensuring reliable signal processing while maintaining overall initialization speed
Data Source
AI summary
Provided herein is an audio processing apparatus including: a controller configured to determine an initialization mode for processing video and audio signals provided from an audio provision apparatus of among a plurality of initialization modes, and to perform an initialization process differently according to the result of determination; and an audio processor configured to process the audio signal and output the processed audio signal, when the initialization process is performed.