Image Display Audio Delay Synchronization
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Solution Overview
Problem
When an image display apparatus and a sound output device simultaneously output sound, there is a drawback in that a sense of difference is generated between sound output from the sound output device and sound output from the image display apparatus, disrupting immersion for users.
Innovation Solution
An image display apparatus is designed with a signal processing device that outputs a first audio signal with a first additional delay time to the audio output device and a second audio signal with a second additional delay time, lower than the first, to the sound output device, allowing for sound synchronization during simultaneous sound output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image display apparatus and sound output device simultaneously output sound with the same delay time, then the system is simple to operate, but a sense of difference is generated between sounds disrupting user immersion
Solution Approach 1:
The patent applies parameter changes by adjusting the delay time parameter differently for each audio output path. The signal processing device sets a first delay time for the audio output device and a second delay time for the sound output device, where the second delay time is greater than the first. This parameter differentiation resolves the synchronization issue while maintaining operational simplicity, as the device automatically manages the delay parameters based on output mode detection.
2Reliability
If the image display apparatus outputs sound with additional delay time to synchronize with external sound output device, then sound synchronization is achieved, but sound delay increases when the apparatus operates alone
Solution Approach 1:
The patent implements dynamics by making the delay time configuration adaptive rather than fixed. The signal processing device dynamically adjusts the delay parameters based on the operating mode: in simultaneous sound output mode, it applies the first and second delay times for synchronization; in single sound output mode, it reduces or eliminates the additional delay. This dynamic adjustment resolves the contradiction between achieving synchronization when needed and minimizing delay when operating alone.
Solution Approach 2:
The system applies self-service by automatically detecting the output mode and configuring appropriate delay parameters without requiring manual user intervention. The signal processing device monitors whether an external sound output device is connected and automatically switches between simultaneous sound output mode and single sound output mode, adjusting delay times accordingly. This self-service mechanism eliminates the need for users to manually configure delay settings while optimizing performance for each operating scenario.
Data Source
AI summary
The image display apparatus of the present disclosure comprises: a display; an audio output device; and a signal processing device, in a simultaneous sound output mode, configured to output a first audio signal based on a first additional delay time to the audio output device and to output a second audio signal based on a second additional delay time, which is lower in level than the first additional delay time, to the sound output device, and in a single sound output mode of the audio output device, configured to output a third audio signal to the audio output device, wherein the first additional delay time is greater than or equal to an additional delay time of a third sound. Accordingly, sound synchronization may be performed in case in which the sound output device and the image display apparatus simultaneously output sound.