Wireless HD Video Sub-Packet CRC for Selective Retransmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless technologies lack the capability to reliably transmit uncompressed high-definition video signals due to bandwidth limitations and interference, and existing compression methods degrade picture quality with each transmission cycle.
Innovation Solution
The method involves sub-packetizing video information and incorporating multiple cyclic redundancy checks (CRC) per sub-packet for error detection, allowing selective retransmission of error-prone data based on perceptual importance, thereby enhancing transmission reliability and reducing bandwidth requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uncompressed HD video signals are transmitted over wireless channels, then transmission reliability is improved, but bandwidth requirements increase and interference issues worsen
Solution Approach 1:
The video data stream is divided into multiple packets, with each packet containing a specific number of video samples. This segmentation allows for selective retransmission of only erroneous packets rather than the entire video stream, managing bandwidth efficiently while ensuring transmission reliability through targeted error correction
Solution Approach 2:
The system dynamically adjusts transmission parameters including packet size, number of CRC checks, and retransmission strategies based on channel conditions. By changing these parameters adaptively, the system optimizes the balance between transmission reliability and bandwidth consumption for uncompressed HD video
2Reliability
If error detection and selective retransmission are implemented, then transmission reliability is improved, but system complexity increases
Solution Approach 1:
Cyclic redundancy check (CRC) information is calculated and attached to each packet before transmission. This preliminary error detection mechanism allows the receiver to identify corrupted packets immediately, enabling selective retransmission without requiring complex post-reception analysis, thus managing system complexity while improving reliability
Solution Approach 2:
The system implements an acknowledgment (ACK) mechanism where the receiver sends feedback to the transmitter about received packets. Erroneous packets are identified through CRC checks and communicated via ACK/NACK signals, triggering selective retransmission. This feedback loop ensures high transmission reliability while keeping the complexity manageable through standardized communication protocols
3Measurement precision
If multiple CRC checks per sub-packet are used, then error detection capability is improved, but processing overhead increases
Solution Approach 1:
Video data is organized into packets containing multiple sub-packets, each with its own CRC check. This segmentation allows error detection to be performed at the sub-packet level, enabling precise identification of erroneous data portions without requiring multiple passes over the entire packet, thus improving error detection capability while managing processing overhead
Solution Approach 2:
The system applies CRC checks at multiple levels (per sub-packet and per packet) rather than attempting to check every single bit. This partial checking approach provides sufficient error detection capability for video transmission while avoiding the excessive processing overhead that would result from exhaustive bit-level verification, maintaining an efficient balance between detection precision and processing time
Data Source
AI summary
A method and system for enhancing transmission reliability of video information over a wireless channel is provided. The video information includes pixels, each having a plurality of components and each component including video information bits that are placed in sub-packets within a packet. Error detection information is determined for one or more sub-packets, and placed in the packet. Then the packet is transmitted from a transmitter to a receiver a wireless channel, wherein the receiver uses the error detection information per sub-packet to check for transmission errors and request retransmission of erroneous video information bits based on their perceptual importance.