Switching Sink for Transparent Real-Time Media Stream Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current solutions for switching real-time media streams in IP-based networks lack transparent switching capabilities between chronologically sequent access units, which is essential for maintaining video stream integrity, and are limited by expensive studio technology and restricted cable lengths.
Innovation Solution
An apparatus and method for switching real-time media streams that includes a switching sink capable of receiving and forwarding media streams in a packet-switched format, utilizing multi-point destination addresses to ensure transparent switching between sources and sinks, with buffering and controlled switching points to maintain synchronicity and format integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SDI crossbars and studio technology are used for switching real-time media streams, then transparent switching between chronologically sequent access units is achieved, but the cost becomes expensive and cable length is limited
Solution Approach 1:
The patent introduces a switching sink as an intermediary component in the packet-switched network. This switching sink receives media streams from multiple sources, performs the switching function, and forwards streams to multiple sinks. By placing this intermediary switching element in the network, the patent achieves transparent switching without requiring expensive dedicated SDI crossbar hardware at each studio location, thereby reducing overall system cost while maintaining switching reliability
Solution Approach 2:
The patent creates a virtual copy of the SDI crossbar functionality by implementing a switching sink that operates in the IP network domain. Instead of requiring physical SDI crossbar hardware, the patent replicates the switching function through software-based or network-based switching sink implementations, allowing the same transparent switching capability to be achieved through packet-switched networks without the hardware cost and cable length limitations of traditional SDI infrastructure
2Reliability
If SDI interface is used for transmission, then uncompressed digital video streams are transmitted reliably, but the maximum cable length is limited
Solution Approach 1:
The patent replaces the mechanical/electrical SDI transmission system with an optical/IP-based packet-switched network system. Instead of using coaxial cables and electrical signals that are limited by cable length and signal degradation, the patent converts video streams into digital packets that can be transmitted over IP networks using standard networking infrastructure, thereby eliminating cable length limitations while maintaining transmission quality through error correction and packet routing mechanisms
3Adaptability or versatility
If packet-switched infrastructure is used, then cost is reduced and format compatibility is improved, but transparent switching capability is lacking
Solution Approach 1:
The patent implements preliminary buffering and synchronization mechanisms at the switching sink before forwarding packets to sinks. By pre-buffering incoming packets and maintaining synchronization information, the switching sink can perform transparent switching at predetermined switching points (such as frame boundaries) without losing the chronological sequence integrity. This preliminary preparation of packet data allows standard IP networking to achieve reliable transparent switching while maintaining format compatibility
Data Source
AI summary
An apparatus (1) for switching real-time media streams of one or multiple sources (Q1, Q2, Q3) to one or multiple sinks (S1, S2, S3) includes one or multiple source ports (QA1, QA2, QA3) for connecting of the one or multiple sources (Q1, Q2, Q3) as well as one or multiple sink ports (SA1, SA2, SA3) for connecting of the one or multiple sinks (S1, S2, S3). The apparatus (1) is adapted to provide a switching sink (SS) and to switch it to a real-time media stream of a first source (Q1). The switching sink (SS) is adapted to receive the real-time media stream of the first source (Q1) in a packet-switched format and to forward the received real-time media stream in a packet-switched format, wherein the packets are provided with a first multi-point destination address (IPMZS) allocated to the switching sink (SS) during forwarding in order to allow for a connecting of the one or multiple sinks (S2) with the real-time media stream of the first source (Q1) forwarded by the switching sink (SS). The switching sink (SS) represents the source of the real-time media stream forwarded by the switching sink (SS) from the “point of view” of the sinks (S1, S2, S3) connected to the apparatus, with which the sinks (S1, S2, S3) can connect through the multi-point destination address (IPMZS).