Audio Delay Synchronization for Mobile Video Playback
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Solution Overview
Problem
Existing technologies face challenges in synchronizing audio signals with video signals, particularly in public settings where audio may be difficult to hear or not synchronized with video, due to delays in transmission, leading to an incoherent viewing experience.
Innovation Solution
A mobile communication device system that receives audio signals wirelessly and allows users to adjust the delay to synchronize audio with delayed video information displayed on a separate device, using a user interface to control the audio delay and output the synchronized audio via an audio interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If audio signals are transmitted separately from video displays in public settings, then audio can be provided to multiple viewers simultaneously, but the audio may be difficult to hear or not synchronized with the video
Solution Approach 1:
The system uses synchronization codes embedded in video frames to create a feedback mechanism. The audio processor receives video frames, extracts synchronization codes, and uses these codes to adjust audio transmission timing, ensuring audio remains synchronized with video even when transmitted separately to multiple devices
Solution Approach 2:
The system embeds synchronization codes in advance within video frame data before transmission. This preliminary action allows receiving devices to pre-process and anticipate timing requirements, enabling accurate audio-video synchronization without requiring complex real-time adjustment mechanisms
2Loss of information
If subtitles are used to provide audio information, then audio can be conveyed to viewers, but subtitles may be difficult to keep up with or disharmonious with the video
Solution Approach 1:
The system extracts audio information from the video signal and transmits it separately to individual audio devices or headphones. This allows viewers to receive audio information directly in their personal audio space without relying on visual subtitles, reducing the cognitive load of keeping up with text while maintaining harmony with the video content
3Reliability
If audio delay control is provided to users, then audio can be synchronized with delayed video, but the device complexity increases
Solution Approach 1:
The audio processor automatically performs delay adjustment based on synchronization codes received from the video source. The system self-calibrates by extracting timing information from video frames and automatically adjusting audio transmission delay, eliminating the need for manual user intervention while maintaining simple device architecture
Solution Approach 2:
The system dynamically changes the audio transmission delay parameter based on the delay applied to video frames. By automatically adjusting this timing parameter in response to video processing delays, the system maintains synchronization without requiring complex control mechanisms or user intervention
Data Source
AI summary
A mobile communication device and an “app” for a mobile communication device for synchronizing audio with a delayed video displayed on a display device, including (a) receiving an audio signal over a wireless communication system, the audio signal containing audio information corresponding to delayed video information displayed on a display device, wherein the audio information is received at the mobile communication device prior to the corresponding delayed video information being displayed on the display device; (b) providing a user interface to the user including an audio delay control allowing the user to control an amount of delay added to the audio information for synchronizing output of the audio information with the delayed video information displayed on the display device; and (c) outputting the audio information via an audio interface of the mobile communication device delayed by the amount of delay added via the audio delay control.