Transport Flow Event Insertion Through Offset Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing broadcast networks experience desynchronization between events and the components of a transport stream due to offsets introduced by network equipment and receivers, leading to inaccurate synchronization of events with video or audio content.
Innovation Solution
A method and device for monitoring and inserting events into a transport stream that measure and compensate for offsets by using synchronisation headers with reference time information, allowing precise synchronization of events with the content at the receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If events are inserted into a transport stream without offset compensation, then the device complexity is reduced, but the synchronization accuracy between events and content deteriorates
Solution Approach 1:
The patent applies preliminary action by measuring the offset between event packets and content packets in advance during the transport stream processing. The monitoring device detects the actual position of event packets relative to their desired positions and determines offset values before the transport stream reaches the receiver. This pre-measurement allows the receiver to compensate for synchronization issues without adding complex real-time processing, thus improving synchronization accuracy while maintaining relatively simple device complexity.
2Reliability
If offset measurement and compensation mechanisms are implemented, then the synchronization accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent introduces an intermediary monitoring device that measures offset values between event packets and content packets in the transport stream. This monitoring device acts as a mediator that detects synchronization issues and provides offset information without requiring complex processing at the receiver端. The receiver uses this offset information to adjust event packet positioning, achieving reliable synchronization while keeping the receiver's device complexity relatively low.
Solution Approach 2:
The patent implements feedback by having the monitoring device continuously measure the actual positions of event packets and compare them with desired positions to determine offset values. These offset measurements are fed back into the system to enable continuous synchronization adjustment. The receiver uses this feedback information to compensate for timing variations, improving synchronization reliability without requiring overly complex device architecture.
3Manufacturing precision
If event packets are inserted at desired positions without considering network offsets, then the ease of operation is maintained, but the manufacturing precision of event positioning deteriorates
Solution Approach 1:
The patent applies preliminary action by measuring and determining offset values during the transport stream processing before distribution to receivers. The monitoring device detects the actual insertion positions of event packets and calculates offset values in advance. This pre-determination of offsets allows event packets to be positioned with high precision at the receiver without requiring complex real-time adjustment operations, thus improving event positioning precision while maintaining ease of operation.
Data Source
AI summary
Methods and devices for inserting an event into a transport flow, for monitoring, managing and receiving the transport flow, and computer program all corresponding thereto. The invention relates to a method for monitoring a transport flow at the output of an equipment of a broadcast network, implementing at least one iteration of the following steps: —obtaining (61) the transport flow delivered by said equipment, —detecting (62) a current event packet associated with content carried by said transport flow, said event packet carrying a synchronization header comprising: —reference time information defined with respect to a reference clock of said content; —a desired delay between said current event packet and a reference packet of said content identified based on said reference time information, —determining (63) an offset between an actual position of said current event packet in said transport flow and a desired position of said current event packet in said transport flow, determined based on said reference time information and on said desired delay, called processing offset.