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Method for Distributed Low-Latency Web Conference: Screen Sharing, Recording, and Playback

IP.com Disclosure Number: IPCOM000219782D
Publication Date: 2012-Jul-12
Document File: 3 page(s) / 40K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for distributed, low-latency screen sharing of a presenter’s desktop via snapshot images. The presenter sends only the screen shots they want their participants to see. There is minimal overhead as their screen is only captured/sent on their command. This decreases latency and transmission delays, as the levels of data being transmitted are lower.

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Method for Distributed Low-Latency Web Conference: Screen Sharing, Recording, and Playback

Broad audience online meetings (i.e., online screen sharing web conferences) often suffer from high latency and long delays when participants are extremely remote. Between the presenter and the participants, there are numerous performance factors that often cause problems, even when network speeds are high. Too often, high latency and delays in the transmission of the online web conference leave the participants out-of-sync, frustrated, disengaged, and/or mentally unfocused on the topic of discussion.

Current methods of screen sharing typically rely on the presenter running the presentation while a video feed (i.e., the presenters' screen is constantly being sent to the participants) is created/transmitted to the remote clients participating in the web conference. This often creates load/stress on the presenter's system, which many times is transmitted to the participants. By design, the current solutions require participants to rely on the transmission of the video feed to stay synchronized with the presenter, which can be discordant, uncoordinated, lag, etc.

This disclosure outlines a method for distributed, low-latency screen-sharing of the presenter's desktop via snapshot images. The participants log into the web conference and the presenter also logs into the web conferencing software and begin as per the normal process. However, instead of the service continually transmitting video throughout the presentation, creating a drain on their system, the presenter presses a key sequence (e.g., ctrl-shift-space) to capture and transmit a single screen shot to the meeting. Since the participants are viewing a web page, there is no need to install any web conferencing client software on their system. Instead, the participants would simply view a web page that is updated as new screen shots from the presenter are sent.

The novel contribution of this invention is that the presenter sends only the screen shots they want their participants to see. There is minimal overhead as their screen is only captured/sent on their command. Keeping participants synchronized does not require as much bandwidth as current solutions. Recording a presentation should generate a much smaller file than a video file of the same presentation. Playback of a recorded presentation should be quicker to load/start, and easily to navigate.

The components and process for implementing the method for distributed low-latency web conference follow. This solution requires the same underlying architecture and methods in existing web conferencing software


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