RTP Packet Peer Recovery for Reliable Video Decoding
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Solution Overview
Problem
In video conferencing scenarios, network jitter and poor quality lead to data loss, causing server overload and delayed data packet retrieval, which disrupts smooth playback.
Innovation Solution
Implement a method where terminals share sequence numbers using shared codes for RTP data packets, enabling them to receive missing packets from other terminals via peer-to-peer connections, reducing server load and ensuring timely data retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the server retransmits lost data packets to terminals, then the reliability of video playback is improved, but the server becomes overloaded and the response time increases
Solution Approach 1:
The patent introduces peer terminals as intermediaries in the data packet retransmission process. When data packets are lost, requesting terminals first check with peer terminals that may have received and cached the packets. This distributes the retransmission burden away from the server, reducing server overload while maintaining video playback reliability through peer-to-peer packet recovery.
2Reliability
If multiple terminals simultaneously request retransmission from the server, then all terminals can recover lost packets, but the server is overloaded and terminals fail to obtain packets timely
Solution Approach 1:
The patent segments the centralized server retransmission function into distributed peer-to-peer retransmission capabilities. Each terminal maintains a cache of received packets and can independently serve other terminals, dividing the retransmission workload across multiple nodes rather than concentrating it on the server. This improves overall system productivity during packet recovery operations.
Solution Approach 2:
Terminals are empowered to serve each other directly for packet retransmission needs. Each terminal autonomously checks its cache and provides missing packets to requesting terminals without requiring server intervention for every retransmission request. This self-service mechanism reduces server load and enables parallel packet recovery across multiple terminals simultaneously.
3Reliability
If the terminal requests retransmission from the server, then lost data packets can be recovered, but the playback smoothness is disrupted due to server overload and delayed response
Solution Approach 1:
The patent implements preliminary caching of data packets at peer terminals before they are needed for playback. Terminals that successfully receive packets store them in cache, preparing them in advance to serve other terminals that may experience packet loss. This preliminary action enables immediate packet recovery without server delays, maintaining playback continuity and smoothness.
Data Source
AI summary
A decoding method and apparatus, a data transmission method and apparatus, a terminal, and a server. The data transmission method includes: receiving a plurality of RTP data packets of a target multimedia file sent by a server, where a protocol header of each of the RTP data packets carries a shared code corresponding to the RTP data packet; sending, in a case that it is determined that the RTP data packets do not include a first RTP data packet of the target multimedia file sent by the server, a shared code of the first RTP data packet to a second terminal; and receiving the first RTP data packet, and inserting the first RTP data packet into a cache to decode the target multimedia file. The first RTP data packet is sent by the second terminal based on the shared code of the first RTP data packet.