Synchronization Signal Output Apparatus Jitter Mitigation
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Solution Overview
Problem
Existing synchronization techniques fail to effectively mitigate jitter in time information when generating synchronization signals for virtual point-of-view content, particularly when the distance between the time information source and receiver is large or when multiple nodes are involved, leading to degraded synchronization performance.
Innovation Solution
A synchronization signal output apparatus that obtains time from a time server, measures internal clock errors, and adjusts its operation mode based on error magnitude to generate and output synchronization signals, employing high-sensitivity or low-sensitivity feedback modes to minimize jitter impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a synchronization signal is generated based on time information from a time server via long distance or multiple nodes, then the synchronization function is established among multiple apparatuses, but a large jitter is introduced into the synchronization signal degrading its performance
Solution Approach 1:
The patent introduces an intermediary device (synchronization signal generation device) that receives time information from the time server and generates synchronization signals locally. This intermediary acts as a mediator between the time server and multiple apparatuses, converting the time information into synchronization signals while filtering out jitter through local clock synchronization and signal processing, thus preventing jitter propagation to client devices
Solution Approach 2:
The patent implements feedback mechanisms where the synchronization signal generation device continuously monitors and adjusts its internal clock based on time information from the time server. By using feedback control to synchronize the internal clock and adjust the phase/frequency of generated synchronization signals, the system maintains accurate synchronization while compensating for jitter in the received time information
2Area of stationary object
If time information is transmitted over long distance or through multiple nodes, then the synchronization coverage is extended, but the jitter of time information increases
Solution Approach 1:
The synchronization signal generation device serves as an intermediary that receives time information from distant time servers or through multiple network nodes. It processes this time information locally and generates synchronization signals without transmitting the raw time information to client devices, thus extending synchronization coverage while preventing jitter propagation through local signal processing
Solution Approach 2:
The patent extracts only the essential synchronization timing information from the received time information, separating it from the jitter-containing raw time data. By extracting and using only the necessary timing elements to generate synchronization signals, the system achieves wide coverage while filtering out harmful jitter components
Data Source
AI summary
A synchronization signal output apparatus obtains time from a time server to synchronize an internal clock with the time of the time server, obtains an error between the time of the time server and time of the internal clock, and generate and output a synchronization signal. The apparatus sets, based on a magnitude of the error, an operation mode for generating and outputting the synchronization signal, and generates and outputs the synchronization signal at the timing that is based on the operation mode.