Controller Bandwidth Reservation for IP Multicast Video Switching
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Solution Overview
Problem
In video systems using IP multicast, switching between video sources often results in video distortion due to the inability to reserve and manage network bandwidth effectively, leading to disruptions in video transmission.
Innovation Solution
A controller with a bandwidth reservation unit and reception instruction unit that acquires network topology and video stream status information to reserve bandwidth and send instructions for seamless video stream switching, ensuring continuous and undistorted video transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If IP multicast technology is used to transmit video sources, then video transmission efficiency is improved, but video distortion occurs during switching due to inability to reserve network bandwidth
Solution Approach 1:
The system performs preliminary actions by acquiring network topology information and reserving bandwidth for the second video stream before the switching instruction is executed. The bandwidth reservation unit secures network resources in advance, ensuring that when switching occurs, the network is already prepared to handle the new stream without distortion or interruption.
Solution Approach 2:
The system implements feedback by continuously monitoring network topology status and video stream information. Based on this feedback, the controller dynamically adjusts bandwidth allocation and timing of switching instructions, ensuring optimal video transmission quality during transitions between streams.
2Speed
If video switching is performed without bandwidth reservation, then switching speed is improved, but video distortion occurs due to network bandwidth conflicts
Solution Approach 1:
Bandwidth reservation is performed in advance before switching occurs. The controller acquires network topology and reserves necessary bandwidth for the incoming video stream, ensuring that when the switching instruction is sent, network resources are already secured, enabling fast switching without quality degradation.
Solution Approach 2:
The system maintains continuous useful action by ensuring uninterrupted video transmission during switching. Bandwidth is reserved and maintained throughout the transition period, preventing any gaps or distortions in video delivery while enabling rapid switching between streams.
3Reliability
If network bandwidth is reserved in advance for video switching, then video quality during switching is improved, but system complexity increases due to bandwidth management overhead
Solution Approach 1:
The controller acts as an intermediary between video sources and receiving devices, centralizing bandwidth management functions. It acquires network topology information, reserves bandwidth, and coordinates switching timing, simplifying the overall system architecture while ensuring high video quality during transitions.
Solution Approach 2:
The controller performs multiple functions including bandwidth reservation, topology management, and switching coordination. By consolidating these functions in a single device, the system achieves high video quality during switching without proportionally increasing overall system complexity.
Data Source
AI summary
[Object] To provides a controller capable of switching a video so that the video is not distorted on the receiving side when the video is transmitted using IP multicast[Solution] There is provided a controller including a bandwidth reservation unit configured to, when an instruction given to a receiving device that receives a first video stream transmitted via IP multicast to receive a second video stream after receiving the first video stream is acquired, acquire information on a status of a network topology and a transmitted video stream and to reserve a network bandwidth for transmitting the second video stream in addition to the first video stream, and a reception instruction unit configured to send out an instruction to receive the second video stream to the receiving device by using the network bandwidth reserved by the bandwidth reservation unit.