Reception Device Imaging Timing Estimation Synchronization

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Solution Overview

Problem

In imaging systems where image data is radio transmitted as data packets, clock discrepancies between the transmission and reception sides lead to overflow or underflow issues, which existing technologies struggle to fully address.

Innovation Solution

A reception device that includes a measurement unit to estimate the imaging timing by measuring the difference between reference timing and packet reception timing, and a processing unit for phase adjustment to synchronize imaging and display processing, using a specific packet's identification signal and adjusting the display clock frequency to minimize phase discrepancies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If transmission time information is extracted and reference time is adjusted based on relative delayed fluctuation time, then clock synchronization is improved, but measurement precision of imaging timing deteriorates

Engineering Contradiction:

Improveclock synchronizationVSAvoidimaging timing measurement

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent segments the timing adjustment process into two distinct parts: (1) using transmission time information for basic clock synchronization, and (2) separately measuring packet reception timing against display signal timing for precise imaging timing estimation. This segmentation allows each mechanism to optimize for its specific function without interfering with the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary measurement mechanism that compares packet reception timing with display signal timing to generate an estimated imaging timing signal. This intermediary measurement acts as a bridge between the transmission side and reception side timing systems, enabling precise synchronization without directly modifying the original timing references.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If phase adjustment processing is performed to synchronize imaging and display processing, then synchronization accuracy is improved, but device complexity increases

Engineering Contradiction:

Improvesynchronization accuracyVSAvoidprocessing unit complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a feedback mechanism where the measurement unit continuously monitors the timing relationship between packet reception and display signal, generates an estimated imaging timing signal, and feeds this back to the processing unit for phase adjustment. This closed-loop feedback system automatically maintains synchronization without requiring complex manual configuration or intervention.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The measurement unit and processing unit work together in a self-service manner where the system automatically measures timing differences, estimates imaging timing, and performs phase adjustments without external control. The reception device self-regulates its synchronization based on internal measurements and calculations.

Inventive Principle:

Principle #25Self-service

3Measurement precision

If multiple packets are measured to estimate imaging timing, then measurement accuracy is improved, but loss of time increases

Engineering Contradiction:

Improveimaging timing estimation accuracyVSAvoidprocessing delay

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent measures multiple packets to estimate imaging timing, using more measurements than the absolute minimum required. This excessive action approach improves statistical accuracy of the timing estimation by averaging out variations, accepting the trade-off of additional processing time for significantly improved precision.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent performs timing measurements on multiple packets in advance to establish a statistical basis for imaging timing estimation. By collecting measurement data from multiple packets before final timing determination, the system prepares accurate timing information proactively, reducing the need for real-time calculations during critical display periods.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8860830B2Reception device which estimates operation timing of the imaging timing

Publication Date: 2014.10.14 OLYMPUS CORPORATION(JP)

AI summary

A reception device includes: a reception unit which receives transmission data from an imaging device, the imaging device performing imaging processing at prescribed intervals, generating image data, packetizes the image data to create the transmission data, and transmitting the transmission data; a display processing unit which performs display processing of generating a display signal from the transmission data; a measurement unit which extracts a specific packet from the transmission data, measures a difference between prescribed reference timing generated at intervals in relation to display of the display signal and reception timing of the specific packet multiple times, and generates an estimated imaging timing signal in which operation timing of the imaging processing is estimated, based on the measurement result; and a processing unit which synchronizes the imaging processing and the display processing so as to be a prescribed phase with each other using the estimated imaging timing signal.