Parallel Data Stream Header Compression for Low Latency
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Solution Overview
Problem
Wireless data stream transmission systems face challenges in maintaining low latency and error robustness, especially in environments with deteriorating channel quality, leading to network overload and performance degradation due to repeated retransmissions of headers, which can result in serious picture restoration errors and operation interruptions.
Innovation Solution
The system employs a method where headers with high similarity are redundantly transmitted or dropped to reduce transmission overhead, using a data stream generator that segments pictures into regions, removes or modifies headers based on similarity, and transmits compact headers, while the receiving device restores headers using similar headers from other regions, thereby reducing network traffic and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If headers are retransmitted to ensure error recovery, then reliability is improved, but network overload and latency increase
Solution Approach 1:
The patent applies copying by transmitting multiple copies of the same header information across different parallel data streams. When one header is lost or corrupted, the receiver can reconstruct it using headers from other streams, eliminating retransmission delays while maintaining reliability
Solution Approach 2:
The patent implements preliminary action by pre-transmitting header information in multiple redundant forms before any potential loss occurs. The receiver is prepared to immediately reconstruct lost headers using the pre-transmitted redundant information, avoiding post-loss retransmission protocols that cause latency
2Reliability
If header transmission is increased to ensure recovery, then reliability is improved, but network traffic increases
Solution Approach 1:
The patent merges header transmission with data stream transmission by integrating header information into the parallel data streams themselves. This combines what would traditionally be separate transmission channels into a unified approach, reducing overall network traffic while maintaining header recovery capability
Solution Approach 2:
The patent applies partial action by transmitting header information selectively across parallel streams rather than duplicating complete headers in every stream. This partial redundancy provides sufficient recovery capability while minimizing the quantity of transmitted data
3Productivity
If parallel data streams are used to increase bandwidth, then productivity is improved, but error propagation risk increases
Solution Approach 1:
The patent segments the video data into multiple parallel data streams, each carrying a portion of the picture data with associated header information. This segmentation increases bandwidth utilization while the independent nature of each stream prevents error propagation across the entire data set
Solution Approach 2:
The patent uses copying of header information across multiple parallel streams to ensure that if one stream experiences errors, the header can be reconstructed from copies in other streams, thereby maintaining reliability while utilizing parallel streams for increased bandwidth
Data Source
AI summary
The present invention relates to a transmission apparatus and reception apparatus for parallel data streams. The present specification discloses a wireless stream transmission apparatus comprising: an encoder for dividing an inputted picture into multiple areas and performing, for each area, encoding so as to generate a bitstream including a header and data; a DS generating unit for removing or modifying at least a portion of headers related to the multiple areas into compact headers, and combining, with the data, at least the remaining headers which have not been removed or the compact headers so as to generate a data stream for each area; and a communication unit for packing the data stream so as to generate a packet, and transmitting, on the basis of wireless communication, the packet to a wireless stream reception apparatus. By using modified headers in applications where real time is important, it is possible to reduce a traffic burden and satisfy low-latency requirements.