Content Output Apparatus Audio Video Synchronization Control
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Solution Overview
Problem
Existing content output apparatuses face challenges in synchronizing audio and video signals with external speakers, particularly due to transmission delays that occur when audio signals are transmitted over long distances, leading to desynchronization issues when video and audio signals are simultaneously output.
Innovation Solution
A content output apparatus with a controller that determines whether an audio signal is related to a video signal and automatically selects an appropriate output mode for synchronization, using Wi-Fi Direct for reduced transmission delay when both signals are present, and adjusting communication methods based on content type and user input to ensure synchronized audio and video playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If audio signal is transmitted to external speakers through network connection, then sound quality is improved, but transmission delay occurs that increases with distance
Solution Approach 1:
The system dynamically adjusts the communication method between TV and external speakers based on the determined output mode. When video-audio synchronization is required, Wi-Fi Direct is used for low-latency transmission; when only audio output is needed, standard Wi-Fi network connection is used. This dynamic adaptation resolves the contradiction by selecting the appropriate transmission protocol based on real-time requirements.
2Adaptability or versatility
If audio signal is transmitted over network to external speakers, then audio output capability is extended, but audio-video synchronization is lost due to transmission delay
Solution Approach 1:
The controller acts as an intermediary that determines the output mode based on whether video signal is being output. When video is output, the controller selects Wi-Fi Direct mode to maintain synchronization; when only audio is output, it selects standard Wi-Fi mode for extended audio capability. This intermediary decision-making process ensures that the appropriate communication protocol is selected to maintain reliability while preserving adaptability.
3Adaptability or versatility
If multiple output modes are provided for different content types, then system adaptability is improved, but device complexity increases
Solution Approach 1:
The controller automatically determines the appropriate output mode based on whether the TV is outputting video signal, without requiring manual user configuration. The system self-adjusts between Wi-Fi Direct mode and standard Wi-Fi mode based on the content type being played, thereby providing high adaptability while keeping the operation simple for users.
Data Source
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AI summary
A content output apparatus, methods for controlling a content apparatus, and a mobile apparatus are provided. The content output apparatus includes a receiver configured to receive content, a display configured to output a video signal of the content, a speaker configured to output an audio signal of the content, a communicator configured to transmit the audio signal to at least one external speaker, and a controller configured to determine whether the audio signal is related to the video signal, and display a user interface screen for inducing a selection of an output mode which transmits the audio signal to the at least one external speaker with a communication method corresponding to the determination result among a plurality of output modes via the display.