How to Seamlessly Switch Video Streams for Many Viewers

This patent describes a computer system that allows an administrator or viewer to smoothly switch between different video or audio sources for many people watching at the same time, without interrupting their viewing experience.

What it covers

The system provides streaming media to multiple client devices over a network. It uses a 'network server module' to send a video stream from a 'first streaming media source' to all viewers on a single channel (Claim 1). When a 'switching terminal' (which could be an administrator or even one of the viewers, per Claims 6 and 7) requests a change, a 'proxy module' steps in. This proxy module, which usually forwards the current stream, then starts forwarding the new 'second streaming media source' to the network server module. Crucially, this happens *while* the network server is still sending the old stream to the viewers (Claim 2), allowing for a smooth, 'seamless transition' on the same channel, like switching camera feeds during a live event.

What it doesn't cover

• —Does not cover systems where only a single client receives streaming media, as it specifies a 'plurality of clients' (Claim 1).
• —Does not cover switching between streams that results in a noticeable interruption or 'hiccup' for the viewer, as it emphasizes 'seamless transition' (Claim 1).
• —Does not cover systems where the new stream is sent on a completely different channel, as the transition occurs 'on the first channel' (Claim 1).
• —Does not cover direct client-to-source streaming without an intermediary 'network server module' and 'proxy module' (Claim 1).
• —Does not cover systems that switch streams without the proxy module forwarding the new stream while the old stream is still active (Claim 2).

The clever bit

The clever part is the 'proxy module' forwarding the new stream to the network server *while* the old stream is still being sent to clients. This allows the network server to prepare or buffer the new content in advance, ensuring that when the actual switch happens, it's smooth and without interruption for the viewers.

Why it matters

This patent addresses a fundamental challenge in early internet streaming: how to change content for a large audience without disruptions. Before such mechanisms, switching video feeds often meant buffering delays or a complete restart of the stream for viewers. By enabling seamless transitions, this technology improved the quality of experience for live events, online broadcasts, and on-demand content, making streaming more professional and user-friendly.

Real-world examples

• 1.Live sports broadcasts online with multiple camera angles
• 2.Webinars or online conferences switching between presenters or screens
• 3.Streaming services transitioning between episodes or advertisements
• 4.Television news programs switching between live feeds from different locations