Uncompressed Video Transmission via Significance-Based Packet Prioritization
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Solution Overview
Problem
Current wireless communication systems, such as 802.11 using 2.4 GHz and 5 GHz radio bands, are unable to support high-definition video streaming due to insufficient bandwidth and sensitivity to perturbations, leading to packet loss and poor video rendering.
Innovation Solution
A method prioritizes the transmission and retransmission of packets based on their significance, sending the most significant bits first to optimize bandwidth usage and ensure the best possible video quality, even under limited bandwidth conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wireless transmission methods are used, then transmission can be maintained, but video quality degrades due to packet loss and insufficient bandwidth
Solution Approach 1:
The video data stream is segmented into multiple priority levels (highest priority, medium priority, lowest priority) based on bit significance. This segmentation allows the system to selectively transmit and retransmit only the most critical packets when bandwidth is limited, ensuring that essential video information is preserved even when overall transmission reliability degrades.
Solution Approach 2:
Different retransmission strategies are applied to different packet types based on their local importance. Highest priority packets (containing critical video data) receive immediate retransmission attempts, while lower priority packets are deferred or discarded. This localized quality management ensures that limited bandwidth resources are allocated to preserve the most important video information.
2Productivity
If channel bandwidth is increased to support HD video, then video quality improves, but system complexity and sensitivity to perturbations increase
Solution Approach 1:
The system dynamically adjusts transmission parameters based on channel conditions. When perturbations are detected or bandwidth becomes insufficient, the system automatically prioritizes transmission of critical packets and adjusts retransmission strategies. This dynamic adaptation allows the system to maintain acceptable video quality across varying bandwidth conditions without requiring permanently high-capacity infrastructure.
Solution Approach 2:
The invention changes the parameter of packet prioritization from a static to a dynamic basis. By categorizing packets into different priority levels and applying different transmission schedules, the system can effectively manage variable bandwidth conditions. This parameter change allows standard wireless infrastructure to support HD video by intelligently managing what gets transmitted rather than requiring increased physical bandwidth.
3Reliability
If retransmission of all lost packets is performed, then completeness is improved, but latency and bandwidth consumption increase
Solution Approach 1:
Instead of retransmitting all lost packets equally, the system performs partial retransmission focused only on the most critical packets. Highest priority packets are retransmitted with high urgency to minimize latency, while medium and lowest priority packets are retransmitted later or discarded if bandwidth is constrained. This partial action approach maintains acceptable video quality without the full latency cost of complete retransmission.
Solution Approach 2:
The system performs preliminary prioritization of packets before transmission, tagging them with priority levels based on their importance to video quality. This preliminary action enables the receiver to immediately identify which retransmitted packets are most valuable, reducing the time needed to process and reconstruct video data after packet loss.
Data Source
AI summary
The present invention concerns a method and a device of transmitting uncompressed video streams. In particular, the method concerns the adaptation of a wireless transmission to bandwidth reduction and packet loss.There is provided a computer implemented method for sending uncompressed video data, wherein the video data comprises binary video components, the method comprising generating a plurality of SB packets from a group of video components, each SB packet being constituted by bits of the video components grouped according to their significance; determining available bandwidth for transmission and sending the most SB packets to fit the available bandwidth, beginning by the most significant ones, meaning containing the most significant bits of the video components. Accordingly, the best possible quality is obtained according to the available bandwidth.