Wireless Video Receiver Using Sub-Stream CRC for Stable UHD Frames
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Solution Overview
Problem
Conventional wireless video transmission systems, such as those based on WiHD, often experience reduced image quality when transmitting UHD video due to poor wireless channel conditions, as they are optimized for FHD resolution and struggle to maintain image integrity at higher resolutions.
Innovation Solution
A wireless receiving apparatus and method that divide video frames into sub-streams, verify and merge them using CRC codes, channel index information, and compression rates, allowing for stable transmission and reconstruction of UHD video frames even in poor channel conditions by temporarily storing incomplete sub-streams and prioritizing error-free frames for display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If video data of UHD resolution is transmitted using conventional WiHD technology, then transmission of high-definition video is achieved, but image quality is reduced due to poor wireless channel conditions
Solution Approach 1:
The video frame is divided into multiple sub-streams that are transmitted through different wireless channels. This segmentation allows the system to distribute the high data rate requirements of UHD video across multiple channels, reducing the burden on any single channel and improving overall transmission reliability under poor channel conditions
Solution Approach 2:
The system transmits multiple copies of the same video frame through different wireless channels simultaneously. If one channel experiences poor conditions or errors, the receiver can reconstruct the video frame using data from other channels, providing a buffer against channel failures before they impact image quality
2Reliability
If multiple sub-streams are transmitted for UHD video, then transmission reliability is improved, but system complexity increases
Solution Approach 1:
The receiver is designed to perform multiple functions: receiving sub-streams, verifying CRC codes, detecting errors, and reconstructing video frames. This multi-functional approach consolidates the complexity into a single device rather than requiring separate systems for each function, making the increased complexity manageable
Solution Approach 2:
The system uses CRC codes transmitted with each sub-stream to provide feedback on transmission quality. The receiver verifies these codes to detect errors and determines whether to reconstruct the video frame from available sub-streams, creating a feedback loop that maintains reliability without requiring complex real-time analysis
3Manufacturing precision
If error detection and reconstruction mechanisms are implemented, then image quality is maintained, but processing time increases
Solution Approach 1:
CRC codes are calculated and attached to each sub-stream before transmission. This preliminary error detection capability allows the receiver to quickly verify sub-stream integrity without requiring complex post-reception analysis, reducing processing time while maintaining image quality
Solution Approach 2:
The system performs error detection on a per-sub-stream basis using simple CRC verification rather than analyzing the entire video frame. This partial action approach processes each sub-stream independently and quickly, avoiding the need for time-consuming comprehensive frame analysis while still ensuring image quality
Data Source
AI summary
A wireless receiving apparatus includes a plurality of wireless receiving modules that receive a plurality of sub-streams constituting a video frame from a wireless transmitting apparatus and a data processing module that determine whether an error occurs in each of the plurality of sub-streams, in response to determining that an error does not occur in any of the plurality of sub-streams, merges the plurality of sub-streams to generate the video frame, transmits the video frame to a display electrically connected to the wireless receiving apparatus, and in response to determining that an error occurs in at least one of the plurality of sub-streams, transmits an immediately-preceding video frame to the display.