RTP Video Tunneling Through H.221 Sub-Channels
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Solution Overview
Problem
The process of re-determining RTP fragmentation boundaries and sub-headers during video conferencing is computationally intensive and requires updates to conferencing systems when specifications change, as these specifications are modified, leading to inefficiencies in transmitting RTP packets between gateways.
Innovation Solution
Copying the entire RTP packet, including the header and sub-header, into the sub-channel portion of an H.221 frame, which eliminates the need for re-calculation of fragmentation boundaries at the receiving gateway, allowing for seamless transmission without adapting to new specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RTP header and sub-header are removed before transmitting through H.221 frame, then the video bits can be copied into sub-channels, but the fragmentation boundaries and RTP sub-headers must be re-determined at the receiving gateway which is computationally intensive
Solution Approach 1:
The patent applies preliminary action by preserving and transmitting the RTP header and sub-header information along with the video bits through the H.221 frame's sub-channels. This preliminary preservation of header information eliminates the need for computationally intensive re-determination of fragmentation boundaries and RTP sub-headers at the receiving gateway, thereby reducing processing cycles while maintaining transmission efficiency
2Adaptability or versatility
If the RTP packet is de-packetized and only video bits are copied, then transmission through H.221 is possible, but the system must be updated when specifications are modified
Solution Approach 1:
The patent applies copying by transmitting complete RTP packets (including headers and sub-headers) through the H.221 sub-channels rather than de-packetizing them. This copying approach preserves the original RTP packet structure, allowing the system to adapt to specification changes without requiring updates to the conferencing system, as the complete packet information is maintained throughout transmission
3Power
If complete RTP packets are transmitted through H.221 sub-channels, then processing cycles are reduced, but more data must be transmitted through the frame
Solution Approach 1:
The patent applies segmentation by utilizing the sub-channel portion of the H.221 frame structure to transmit RTP packet data. This segmentation approach allows complete RTP packets to be transmitted through dedicated sub-channels, reducing processing cycles at the receiving gateway while efficiently managing data transmission volume through structured frame allocation
Data Source
AI summary
A system is provided. The system includes a first gateway operable to receive a real-time protocol (RTP) packet including video data from a first endpoint; and a second gateway operable to communicate with a second endpoint. The first gateway is operable to communicate the RTP packet to the second gateway in a sub-channel portion of an frame-based protocol.