Vehicle Multimedia Timing Control for Multi-Device AV Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle infotainment systems face synchronization issues due to varying processing delay times across different mobile devices connected to a vehicle, leading to unsynchronized sound and image output, which can cause user dissatisfaction.
Innovation Solution
A vehicle control system and method that calculates and synchronizes the output of images and sounds across multiple mobile devices by setting a reference processing delay time, determining output and transmission points based on this time, and adjusting these points when new devices with different delay times are connected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sound is transmitted to multiple mobile devices with different processing delay times, then each device can process and output sound independently, but the sound output from different devices becomes unsynchronized causing user dissatisfaction
Solution Approach 1:
The vehicle control device performs preliminary actions by obtaining processing delay times from each mobile device before sound transmission, setting a reference time based on these delays, and calculating adjusted transmission time points. This preliminary characterization of device-specific delay parameters enables subsequent synchronization by compensating for individual device processing variations through pre-calculated timing adjustments.
2Ease of operation
If a fixed reference time is set for sound transmission, then transmission timing is simplified, but new mobile devices with different processing delay times cannot be accommodated maintaining synchronization
Solution Approach 1:
The system implements dynamic adaptability by establishing a default reference time for efficient transmission control while incorporating mechanisms to detect new mobile devices and recalculate the reference time based on their specific processing delay times. This dynamic adjustment capability allows the system to maintain simplicity in normal operation while adapting to changing device configurations, resolving the contradiction between fixed control simplicity and dynamic adaptability.
3Manufacturing precision
If the vehicle control device waits for all mobile devices to be ready before transmission, then synchronization is achieved, but transmission delay increases
Solution Approach 1:
The vehicle control device applies local quality by calculating device-specific adjusted transmission time points based on individual mobile device processing delay times while using a unified reference time framework. Instead of uniformly waiting for all devices or transmitting without coordination, the system tailors the transmission timing for each device based on its characteristics, achieving synchronization without requiring all devices to wait for the slowest one, thus reducing overall transmission delay while maintaining precision.
Data Source
AI summary
A vehicle control system comprises one or more mobile devices that perform wireless communication, and a vehicle control device that sets a maximum value of processing delay times obtained from the one or more mobile devices to a reference time, calculates a first time point at which an image is to be output, a second time point at which sound is to be output, a third time point at which sound is to be transmitted to the one or more mobile devices based on the reference time, and performs control to output the image at the first time point, output the sound at the second time point, and transmit the sound at the third time point.