Linear Mapper for Wi-Fi Video Transmission Payload Mapping
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Solution Overview
Problem
Existing wireless video transmission systems often fail to achieve high quality, low latency, and robustness due to unsatisfactory performance when connecting standard video compression units with standard wireless transmitters.
Innovation Solution
Incorporating a linear mapper integrated with an appropriate video compression unit and transmitter, which divides video data into two streams - a coarse description and a refined description using Discrete Cosine Transform (DCT) taps, processed by the linear mapper to generate transmission payloads for high bit-rate transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If standard video compression units and wireless transmitters are connected directly, then device complexity is reduced, but video quality and transmission reliability deteriorate
Solution Approach 1:
The patent introduces a linear mapper as an intermediary component between the video compression unit and wireless transmitter. This linear mapper transforms DCT coefficients into transmission payloads using a linear transformation that matches the statistical characteristics of the wireless channel, thereby improving transmission reliability without significantly increasing system complexity.
Solution Approach 2:
The patent changes the parameter representation of video data by transforming DCT coefficients through a linear mapper into a different domain (transmission payloads) that is better suited for wireless transmission. This parameter transformation optimizes the match between source statistics and channel characteristics, improving both video quality and reliability.
2Quantity of substance
If video data is compressed using standard compression standards, then transmission bandwidth is reduced, but transmission time and latency increase
Solution Approach 1:
The patent segments video data into DCT coefficients and processes them through a linear mapper that operates on transformed domains. This segmentation and transformation approach allows for more efficient packing and transmission of video information, reducing both bandwidth requirements and transmission time compared to standard compression alone.
Solution Approach 2:
By changing the parameter domain from standard DCT coefficients to linearly transformed payloads, the patent achieves more efficient data representation that reduces transmission bandwidth while maintaining low latency through optimized transformation processes.
3Manufacturing precision
If high bit-rate transmissions are used, then video quality improves, but system complexity and processing requirements increase
Solution Approach 1:
The patent replaces complex mechanical/video processing systems with a mathematical transformation approach (linear mapper operating on DCT coefficients). This substitution achieves high video quality through efficient linear transformation and payload generation without requiring complex processing hardware or algorithms.
Solution Approach 2:
The patent achieves high video quality by changing the parameter representation through linear transformation, which optimizes the use of transmission bandwidth and allows for efficient high bit-rate transmissions without proportionally increasing processing complexity.
Data Source
AI summary
A system for wireless video transmission includes a video compression unit to generate a description of DCT taps, a linear mapper to generate transmission payload from the DCT taps, and a wireless transmitter to map the transmission payload into constellation points, wherein the real part and the imaginary part of each of the constellation points is a monotonic function of some of the DCT taps.