Perceptual Residue Selection for Video Bandwidth Reduction
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Solution Overview
Problem
Video conferencing systems face bandwidth constraints when multiple users share a common communication channel, leading to reduced video quality due to limited data distribution capabilities.
Innovation Solution
A video conferencing system that employs a pre-processing component to determine a contrast sensitivity threshold for pixel data, setting pixels with luminescence differences below this threshold to zero, thereby reducing the amount of data that needs to be encoded and transmitted, thus conserving bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all pixel data is transmitted to maintain video quality, then visual quality is preserved, but bandwidth consumption increases
Solution Approach 1:
The patent extracts only the perceptually significant pixel data by comparing consecutive video frames and identifying pixels with luminescence differences exceeding the contrast sensitivity threshold. Only these significant residue pixels are transmitted, while redundant pixels below the threshold are discarded, thereby reducing bandwidth consumption without compromising perceived visual quality
Solution Approach 2:
The patent applies different transmission quality levels to different spatial locations based on local perceptual significance. Each pixel is individually evaluated against the contrast sensitivity threshold, and only pixels requiring high fidelity (those with significant changes) are transmitted in full detail, while other pixels use differential encoding or are discarded, achieving localized quality adaptation
2Productivity
If bandwidth is reduced to accommodate multiple users, then system capacity increases, but video quality deteriorates
Solution Approach 1:
The patent extracts and transmits only the essential visual information by identifying and discarding redundant pixel data that falls below the contrast sensitivity threshold. This selective extraction enables more users to share the communication channel simultaneously while each user still receives sufficient visual quality for effective communication
Solution Approach 2:
The patent performs preliminary processing of video frames by comparing consecutive frames and pre-identifying significant residue pixels before encoding and transmission. This advance preparation allows the system to optimize bandwidth allocation for multiple users while maintaining adequate video quality, as the essential information is already identified and ready for efficient transmission
Data Source
AI summary
A perceptual mechanism for residue selection in a video encoder may be provided. The mechanism may comprise a method, system, or device for receiving video frames comprising pluralities of pixels. For each video frame, a sensitivity threshold may be determined for each pixel of a previous video frame. The pixels of the video frame may compared in turn to the pixels of the previous video frame to determine a residue value. The residue value may be compared to the sensitivity threshold such that when the residue value is less than the sensitivity threshold, the pixel data in the video frame may be zeroed out prior to encoding the video frame for transmission.