PIP-Aware Video Encoding for Telephony Quality
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Solution Overview
Problem
Current video telephony systems with picture-in-picture (PIP) features face challenges in maintaining high video quality, as the outgoing video is often overlaid on the incoming video, leading to reduced encoding efficiency in the PIP region, which affects the clarity of non-PIP regions.
Innovation Solution
The system transmits PIP information from a local video communication device to a remote device, allowing preferential encoding of non-PIP regions with enhanced quality by skipping or reducing encoding in the PIP region, and incorporating a 'PIP-aware' video encoder-decoder (CODEC) to process this information for improved visual quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If preferential encoding is applied to non-PIP regions, then visual quality of non-PIP regions is improved, but encoding complexity increases
Solution Approach 1:
The patent applies different encoding qualities to different regions of the video frame. Non-PIP regions are encoded with high quality using full encoding processes, while PIP regions are encoded with lower quality or skipped entirely. This regional differentiation resolves the contradiction by improving overall visual quality in important areas without uniformly increasing encoding complexity across the entire frame.
Solution Approach 2:
The video frame is segmented into PIP regions and non-PIP regions based on received PIP information. The encoding process is then applied differently to each segment: preferential encoding for non-PIP regions and reduced/skipped encoding for PIP regions. This segmentation allows the system to manage encoding complexity by treating different regions separately rather than applying uniform high-quality encoding to the entire frame.
2Productivity
If encoding bits are allocated to non-PIP regions, then transmission efficiency is improved, but bandwidth consumption increases
Solution Approach 1:
The patent allocates encoding bits locally based on region importance. Non-PIP regions receive more bits with higher encoding quality, while PIP regions receive fewer bits or are skipped. This localized bit allocation improves transmission efficiency for the most important visual content without uniformly increasing bandwidth consumption across the entire video stream.
Solution Approach 2:
Instead of encoding the entire video frame at high quality, the patent applies partial encoding action only to non-PIP regions. PIP regions are either encoded with reduced quality or skipped entirely. This partial action approach improves transmission efficiency for critical regions while avoiding the excessive bandwidth consumption that would result from encoding the entire frame at the same high quality level.
Data Source
AI summary
The disclosure is directed to techniques for picture-in-picture (PIP) processing for video telephony (VT). According to the disclosed techniques, a local video communication device transmits PIP information to a remote video communication device. Using the PIP information, the remote video communication device applies preferential encoding to non-PIP regions of video transmitted to the local video communication device.