FEC Packet Subblock Encoding for Lost Data Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In broadcasting and communication systems, data congestion leads to packet loss, causing issues like degraded audio/video quality and file loss, necessitating an efficient method for data recovery using Forward Error Correction (FEC) coding, which requires efficient generation of source symbol blocks and in-band signaling for error correction IDs.
Innovation Solution
The method involves splitting source packet blocks into subblocks, converting them to symbol subblocks, generating repair symbol blocks using error correction codes, and transmitting error correction packets with specific IDs to facilitate efficient decoding and data recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data is transmitted in packets over a congested network, then transmission capacity is increased, but packet loss occurs leading to data degradation
Solution Approach 1:
The patent applies Forward Error Correction (FEC) coding in advance during the encoding process, adding redundancy data to source packets before transmission. This preliminary action enables the receiver to reconstruct lost packets without requiring retransmission, thus maintaining data integrity despite network congestion and packet loss.
2Reliability
If FEC coding is applied to recover lost packets, then data integrity is improved, but system complexity increases due to encoding and decoding processes
Solution Approach 1:
The patent segments the FEC encoding process into distinct functional modules: source packet generation, FEC encoding with redundancy addition, packetization with headers, and separate decoding modules at the receiver. This segmentation allows each component to be optimized independently and simplifies the overall system architecture by distributing processing tasks across modular units.
3Productivity
If source packets of variable lengths are converted to fixed-length source symbols, then FEC encoding efficiency is improved, but padding data is required increasing overhead
Solution Approach 1:
The patent dynamically adjusts the source symbol length parameter based on the actual data characteristics and transmission requirements. By changing the symbol length parameter, the system can optimize the balance between encoding efficiency and padding overhead, adapting to different traffic patterns and network conditions without requiring fixed padding for all cases.
Data Source
AI summary
A method and an apparatus for transmitting and receiving a packet in a broadcasting and communication system are provided. The method includes splitting a source packet block including source packets into a plurality of source packet subblocks, converting the source packet subblocks to source symbol subblocks, respectively, generating a plurality of first repair symbol blocks by encoding the source packet subblocks using a first error correction code, configuring an error correction source packet by adding a source error correction payload IDentifier (ID) to source symbols included in the source symbol subblocks and configuring an error correction repair packet by adding a repair error correction payload ID to repair symbols included in the first repair symbol subblocks, and transmitting the error correction source packet and the error correction repair packet.