3D Video Pairing Error Correction via Timestamp Verification
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Solution Overview
Problem
In 3D video playback, pairing errors between left-eye and right-eye pictures due to encoding and decoding issues lead to degraded video quality and an uncomfortable viewing experience, as these errors result in incorrect presentation times and missing pairs of images.
Innovation Solution
A method and apparatus that detect pairing errors between video streams by checking presentation timestamps and content, allowing for selective processing operations such as skipping or repeating frames to ensure correct pairing, and creating new frames through duplication or conversion to maintain synchronized playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MVC format is used to encode 3D video content with multi-track storage scheme, then encoding flexibility and storage efficiency are improved, but picture pairing reliability deteriorates due to potential desynchronization between left-eye and right-eye pictures
Solution Approach 1:
The patent applies preliminary action by checking picture pairing correctness in advance before playback. The checking circuit verifies whether left-eye and right-eye pictures are correctly paired based on presentation time stamps, and the processing circuit pre-corrects any pairing errors by skipping, repeating, or creating pictures to ensure proper synchronization before the video is displayed to the user.
Solution Approach 2:
The patent implements feedback by using the detecting result from the checking circuit to control the processing circuit's corrective actions. The system continuously monitors picture pairing status and adjusts the video output accordingly, creating a closed-loop control system that maintains picture synchronization throughout playback.
2Reliability
If picture pairing checking and correction operations are performed, then picture pairing reliability is improved, but processing complexity increases due to additional checking and conditional processing steps
Solution Approach 1:
The patent applies segmentation by dividing the video processing system into distinct functional modules: a checking circuit that detects pairing errors and a processing circuit that corrects them. This modular architecture allows each component to perform its specific function independently, making the overall system easier to design, implement, and maintain despite the added complexity of error correction.
3Manufacturing precision
If pairing error correction operations such as skipping or repeating pictures are performed, then picture pairing accuracy is improved, but playback time synchronization may deteriorate
Solution Approach 1:
The patent applies partial action by selectively applying correction operations only when pairing errors are detected, rather than applying corrections to all pictures unconditionally. The processing circuit uses the detecting result to determine whether to skip, repeat, or create pictures, thereby minimizing unnecessary interventions that could disrupt playback timing while still ensuring accurate picture pairing when needed.
Data Source
AI summary
A method of processing a video input, having a first video bitstream transmitting pictures of a first view and a second video bitstream transmitting pictures of a second view, includes: checking the video input to detect if a first picture of one of the first and second views is correctly paired with a second picture of the other of the first and second views for specific presentation time; and referring to a detecting result for selectively performing a predetermined processing operation upon the video input. The video input transmits the second picture while transmitting the first picture. When the detecting result indicates that the first picture is not correctly paired with the second picture for the specific presentation time, both of the first picture and the second picture are skipped, and previous pictures that are correctly paired with each other for the specific presentation time is repeated.