MIMO Video Transmission Using Quasi-Continuous Modulation
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Solution Overview
Problem
Existing video transmission methods, particularly in high-end applications, face limitations in transmitting ultra-high definition videos over long distances due to the digital cliff effect, limited transmission distance, and inability to exploit video redundancy, leading to issues with image quality and reliability under extreme conditions.
Innovation Solution
The method involves video predictive coding and multi-dimensional transforms to decorrelate and map video signals into transform-domain residual coefficients, which are then modulated using quasi-continuous modulation and transmitted over MIMO channels, enabling efficient and reliable transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If digital compressed video transmission is used, then transmission distance and data rate are improved, but image quality deteriorates due to compression loss
Solution Approach 1:
The patent extracts only the essential video information by transforming the video signal into frequency domain and retaining only significant frequency coefficients, discarding redundant information. This allows transmission of compressed video data while maintaining acceptable image quality, resolving the contradiction between compression ratio and image quality.
2Manufacturing precision
If digital uncompressed video transmission is used, then image quality is maintained, but transmission distance is limited due to high bit rate
Solution Approach 1:
The patent extracts and transmits only the significant frequency coefficients of the video signal, removing redundant information. This compression allows uncompressed-quality video to be transmitted over longer distances without the bandwidth constraints of traditional uncompressed transmission.
Solution Approach 2:
The patent transforms the video signal from spatial domain to frequency domain, changing the representation parameters. This transformation allows for more efficient compression while preserving perceptually important information, enabling extended transmission distance without quality loss.
3Device complexity
If traditional video transmission is used, then system simplicity is maintained, but reliability deteriorates under extreme conditions due to digital cliff effect
Solution Approach 1:
The patent applies forward error correction coding before video signal transmission, creating a buffer against channel errors. This cushioning effect prevents the digital cliff effect by providing redundancy that can compensate for signal degradation, maintaining reliability under extreme conditions without significantly increasing system complexity.
4Ease of operation
If video redundancy is not exploited, then transmission simplicity is maintained, but transmission efficiency deteriorates over long distances
Solution Approach 1:
The patent extracts and exploits video redundancy by identifying and removing correlated information in the frequency domain. This allows for more efficient use of transmission bandwidth, improving transmission efficiency over long distances while maintaining relatively simple processing operations.
Data Source
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AI summary
Provided in the present invention is a method for transmitting a video using quasi-continuous modulation by means of a multi-input multi-output (MIMO) channel, comprising the following steps: de-correlating a source video by means of video prediction encoding and multi-dimensional transformation so as to generate a transformation domain video residual coefficient; mapping the transformation domain video residual coefficient in parallel into one or more transmission streams by means of a sub-carrier or sub-channel optimized sorting; modulating the transmission streams in parallel into a plurality of emission output signals by means of linear normalization and quasi-continuous modulation; and emitting the plurality of emission output signals in parallel to an MIMO channel by means of a plurality of antennas or cable drivers.