Image Display Apparatus Frame Loss Compensation

Solution Overview

Problem

Existing image display technologies cannot effectively handle the loss of an entire image frame due to uncorrectable errors in encoded bit streams, leading to disruption in image display, as they rely on adjacent macroblocks for interpolation which is not possible when all data packets are corrupted.

Innovation Solution

Generating an interpolation frame based on preceding and succeeding frames to replace the lost frame, using motion vectors and pixel value averaging to ensure continuous image display.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing error correction techniques (FEC) are used to correct transmission errors, then some errors can be corrected, but uncorrectable errors still cause frame loss and display interruption

Engineering Contradiction:

Improveerror correction capabilityVSAvoidframe loss

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent performs preliminary actions by detecting frame loss before display occurs, using continuity counter verification and packet sequence number checking to identify lost frames early in the decoding process, enabling timely generation of replacement frames

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary replacement frame generation mechanism that creates substitute frames using motion compensation from adjacent frames, acting as a mediator between the lost frame and the display output to maintain continuous image sequence

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If macroblock replacement using adjacent macroblock motion vectors is used, then individual macroblock errors can be corrected, but entire frame loss cannot be handled

Engineering Contradiction:

Improvemacroblock restoration qualityVSAvoidframe loss handling capability

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The patent segments the frame loss problem into detectable units by verifying continuity counters and packet sequence numbers, allowing identification of entire lost frames versus partial errors, enabling different recovery strategies for different error scopes

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary replacement frame generation mechanism that creates substitute frames using motion compensation from adjacent frames, acting as a mediator between the lost frame and the display output to maintain continuous image sequence

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If all packets constituting a frame cannot be decoded, then the frame must be discarded, but this causes display interruption and quality degradation

Engineering Contradiction:

Improvedecoding simplicityVSAvoidcontinuous display capability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent performs preliminary actions by detecting frame loss before display occurs, using continuity counter verification and packet sequence number checking to identify lost frames early in the decoding process, enabling timely generation of replacement frames

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary replacement frame generation mechanism that creates substitute frames using motion compensation from adjacent frames, acting as a mediator between the lost frame and the display output to maintain continuous image sequence

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8559527B2Image display apparatus

Publication Date: 2013.10.15 MAXELL LTD

AI summary

An object of the present invention is to provide a technique of appropriately compensating for loss of even an entire image frame due to data error such as a transmission error to allow display of a high quality image. An image display apparatus of the present invention comprises: a decoding unit which decodes an encoded bit stream into an image signal; an interpolation image generating unit which generates an interpolation frame based on frames of the decoded image signal; and a control unit which detects an error in the encoded bit stream and controls the interpolation image generating unit; wherein when a frame of the encoded bit stream is lost (that is, it has not been able to be decoded) due to an uncorrectable error, the above interpolation frame is displayed instead of the lost frame.