MMT FEC Source Block Alignment for Low-Delay Hybrid Packet Decoding
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Solution Overview
Problem
In broadcasting and communication systems, the transmission of hybrid multimedia content leads to increased data confusion and packet loss, causing delays and quality degradation due to the existing Forward Error Correction (FEC) schemes, which are inefficient in minimizing decoding time delays and ensuring seamless content consumption.
Innovation Solution
The method involves generating an FEC source block using MMT Processing Units (MPUs) to maintain alignment between MPU and FEC source block boundaries, performing FEC encoding, and generating sub-blocks to minimize decoding delays and prevent decoding failures, thereby ensuring efficient transmission and reception of hybrid content packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FEC encoding is performed by unit of source block with predetermined number of packets, then error correction capability is improved, but decoding time delay increases due to waiting for complete source block
Solution Approach 1:
The patent segments the source block into multiple sub-blocks, where each sub-block contains a portion of the source block data. This allows the receiver to decode and reconstruct data incrementally as sub-blocks arrive, rather than waiting for the entire source block. The segmentation enables parallel processing and reduces the effective decoding delay while maintaining the error correction capability of the original FEC scheme.
2Productivity
If media decoder performs decoding by unit of predetermined size, then decoding efficiency is improved, but overall delay increases due to additional decoding stages
Solution Approach 1:
The patent performs preliminary organization of data into sub-blocks at the transmitter side, aligning with the media decoder's predetermined processing size. This preliminary action ensures that when data arrives at the receiver, it is already structured in a format optimized for the media decoder's processing units, eliminating the need for additional reorganization and reducing overall delay while maintaining decoding efficiency.
3Adaptability or versatility
If hybrid content is transmitted by separating multimedia content individually, then content flexibility and adaptability are improved, but data confusion and packet loss increase in the network
Solution Approach 1:
The patent merges multiple separated multimedia content packets into a unified source block structure with common FEC protection. By combining packets from different multimedia sources into a single error correction framework, the system maintains the flexibility of individual content types while providing collective error protection that reduces packet loss impact. The sub-block structure allows selective reconstruction of affected content while preserving other content types.
Data Source
AI summary
A method of transmitting a complex content packet in a broadcasting and communication system is provided. The method includes creating an Forward Error Correction (FEC) source block by using at least one MMT Processing Unit (MPU) included in at least one MPEG Media Transport (MMT) asset, and transmitting the FEC source block, wherein the FEC source block is generated so that a boundary of the at least one MPU and a boundary of the FEC source block do not deviate.