Multimedia Device Adaptive Audio-Video Synchronization
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Solution Overview
Problem
Multimedia devices face a time difference in user reactions to visual and auditory stimuli due to varying viewing distances, as reaction times to visual and auditory stimuli differ based on the distance from the device, affecting simultaneous image and sound recognition.
Innovation Solution
A multimedia device equipped with a distance sensor to measure viewing distance, a controller that adjusts the output timings of video and audio signals based on calculated reaction time differences, ensuring synchronized output by determining optimal timing adjustments based on the viewing distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the multimedia device outputs video and audio signals simultaneously, then the device structure is simple and operation is easy, but the user experiences time difference in reactions to visual and auditory stimuli due to varying viewing distances
Solution Approach 1:
The patent applies dynamics by making the output timing of audio signals adaptive rather than fixed. The controller dynamically adjusts the audio output timing based on the measured viewing distance, changing the synchronization parameters in real-time according to user position. This resolves the contradiction by maintaining simple simultaneous output operation while achieving reliable synchronization through dynamic timing adjustment.
Solution Approach 2:
The patent changes the timing parameter of audio signal output based on viewing distance measurements. By adjusting the output timing parameter according to distance, the system maintains synchronization reliability across different viewing positions while keeping the overall device operation simple and straightforward.
2Reliability
If the multimedia device adjusts output timings based on viewing distance, then synchronization reliability is improved, but the device complexity increases due to additional sensors and controllers
Solution Approach 1:
The patent applies self-service by enabling the multimedia device to automatically measure its own viewing distance and autonomously adjust its output timing without external intervention. The distance sensor and controller work together within the device itself to achieve adaptive synchronization, improving reliability while minimizing the need for additional complex external systems.
Solution Approach 2:
The controller serves multiple functions: it manages normal video and audio output, processes distance sensor data, calculates appropriate timing adjustments, and controls the adjusted output signals. By making the controller multi-functional, the patent avoids adding separate dedicated hardware for each function, thereby improving synchronization reliability while limiting the increase in overall device complexity.
3Device complexity
If the multimedia device uses a fixed output timing for video and audio signals, then the device complexity is low, but the user experience deteriorates due to time difference in reactions at different viewing distances
Solution Approach 1:
The patent transforms the static, fixed output timing into a dynamic system that adapts to viewing distance. The controller adjusts audio timing based on real-time distance measurements, creating a dynamic synchronization system that improves user experience while maintaining relatively simple device architecture through efficient use of existing components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables users to simultaneously recognize images and sounds from the multimedia device, improving user convenience and providing an optimal viewing environment by aligning output timings with reaction time differences, regardless of the viewing distance.
Implementation Method 1
the distance sensor may calculate the viewing distance using an infrared radiation
Data Source
AI summary
A multimedia device includes a distance sensor which measures a viewing distance, a controller which controls an output timing of a video signal and an output timing of an audio signal based on the viewing distance, an audio device which outputs a sound in response to the audio signal, and a display device which outputs an image in response to the video signal.