Audio-Animation Queue Synchronization for Real-Time Browser Playback
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Solution Overview
Problem
Synchronizing animation and audio data in real-time over a network is challenging due to network latency, jitter, and packet loss, leading to misalignment and reduced realism in applications like lip-syncing in virtual characters.
Innovation Solution
A synchronization and playback system that uses a feedback mechanism within a local application to store data in queues and adjust playback timing based on network conditions, ensuring synchronized audio and animation by pausing animation until audio data is ready.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If real-time streaming of audio and animation data is implemented over a network, then the ability to provide real-time synchronized content is improved, but network latency and jitter cause misalignment between audio and animation
Solution Approach 1:
The system performs preliminary actions by pre-buffering audio and animation data in queues before playback. The synchronization system monitors queue depths and adjusts playback timing in advance to compensate for network variations, ensuring that data is ready before it needs to be presented, thereby maintaining synchronization despite network latency and jitter.
Solution Approach 2:
The system implements a feedback mechanism where the synchronization system continuously monitors the depth of audio and animation queues, detects timing deviations, and dynamically adjusts playback timing based on this feedback. This closed-loop control allows the system to compensate for network variations in real-time and maintain synchronization accuracy.
2Reliability
If playback timing is adjusted to compensate for network conditions, then synchronization accuracy is improved, but playback delays increase
Solution Approach 1:
The system applies dynamic adjustments to playback timing based on real-time monitoring of queue depths and network conditions. Rather than using fixed timing compensation, the system continuously adapts playback rates and timing to minimize delays while maintaining synchronization, optimizing the balance between synchronization accuracy and playback speed.
Solution Approach 2:
The system changes playback parameters dynamically, adjusting playback rates and timing offsets based on monitored queue depths and synchronization state. This allows the system to optimize playback timing in real-time, reducing unnecessary delays while maintaining synchronization accuracy under varying network conditions.
3Reliability
If data is buffered in queues to manage synchronization, then synchronization control is improved, but system complexity increases
Solution Approach 1:
The system implements a universal synchronization architecture where a single synchronization system handles both audio and animation data streams using the same queue management and timing adjustment mechanisms. This multi-functional approach consolidates complexity into a unified system rather than requiring separate synchronization mechanisms for each data type.
Solution Approach 2:
The synchronization system acts as an intermediary layer between the network data streams and the playback system. It mediates the timing and coordination between audio and animation data through centralized queue management and timing control, simplifying the overall system architecture by providing a single point of coordination rather than requiring direct peer-to-peer synchronization between multiple components.
Data Source
AI summary
Disclosed are apparatuses, systems, and techniques for real-time streaming and playback of synchronized audio and animation data in a web-browser, which include responsive to determining that audio data in an audio data queue satisfies a first criterion, generating a delay indicator; receiving updates to the audio data queue; and responsive to determining that the audio data in the audio data queue satisfies a second criterion, causing the audio data in the audio data queue and animation data in an animation data queue to play in accordance with the delay indicator to maintain synchronization between the audio data and the animation data.