Video Stream Color Correction via Idle Time Transmission
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Solution Overview
Problem
Compressed video streams transmitted over wireless networks often suffer from reduced image quality due to compression schemes that alter color codes, particularly when image changes are below a threshold or have repeating patterns, leading to sub-optimal decoding at the sink device.
Innovation Solution
Identifying idle time in the compression scheme, calculating color code corrections between successive images, and sending these corrections from the source device to the sink device in real-time for image enhancement, utilizing a monitoring module and image correction module to apply corrections during identified idle periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If compression scheme is applied to reduce bandwidth, then transmission efficiency is improved, but image quality deteriorates due to color code alterations
Solution Approach 1:
The patent extracts only the essential correction information (color code differences) from the full image data and transmits only these corrections during idle periods, rather than transmitting the complete corrected image. This allows recovery of image quality while maintaining compression benefits.
Solution Approach 2:
The system performs preliminary calculation of color code corrections at the source device during idle time before transmission is needed. By pre-calculating and storing correction data, the system prepares the necessary information to restore image quality without requiring re-encoding at the sink device.
2Manufacturing precision
If corrections are transmitted continuously to maintain image quality, then decoding accuracy is improved, but bandwidth consumption increases
Solution Approach 1:
Instead of continuous transmission, the patent implements periodic transmission of corrections only during identified idle time periods when image changes are below the threshold. This selective transmission maintains decoding accuracy while significantly reducing bandwidth consumption during active video transmission.
Solution Approach 2:
The compression scheme itself identifies idle periods and triggers correction transmission automatically based on predefined thresholds, eliminating the need for continuous monitoring and manual intervention. The system serves itself by using the compression process's own characteristics to determine when corrections are needed.
3Manufacturing precision
If re-encoding is performed at sink device to improve image quality, then decoding quality is improved, but processing time increases
Solution Approach 1:
Rather than re-encoding the entire image at the sink device, the patent uses a copying approach where correction data is transmitted and applied directly to the decoded image. The sink device copies the correction information and applies it to restore color codes, avoiding the time-consuming re-encoding process while maintaining decoding quality.
Data Source
AI summary
A method for enhancing image quality of compressed video stream, mirrored thorough wireless network using a compression scheme, between a source device and a sink device. The method includes identifying idle time in the compression scheme of video, where the image change is below a predefined threshold for pre-defined period of time, calculating color code corrections between an original source last image and a decoded last image, sending corrections from the source device to the sink device in real-time during identified idle time and performing an image correction at the sink device based on the received correction.