AIR conferencing: accelerated instant replay for in-meeting multimodal review

When people attend meetings they may miss parts of the discussion if they, for example, step out to take a phone call, go to the bathroom, or have a momentary lapse in concentration. As a result, they may need to catch up on what they missed upon returning to the meeting. Asking other attendees for a recap is often disruptive. To avoid such disruptions, we have developed an Accelerated Instant Replay (AIR) Conferencing system for videoconferencing that enables participants to privately catch up to an ongoing meeting. We explored several mechanisms where the meeting content is replayed at an accelerated rate so that the participants can catch up to the live discussion reasonably quickly.

We encountered several implementation challenges for in-meeting replay. One issue related to accelerated audio playback was handling the case when replay audio catches up to the live audio. Traditional streaming audio technologies do not allow management of a live, real-time audio channel and an accelerated catch up audio channel. In our system, we stored up to 60 minutes of audio in memory using a circular buffer, which enabled us to continuously write live audio to the end of the buffer while also allowing the user to review playback from any point in the buffer.

memoryってのはサーバーではなくローカルのことかな?

まあやっぱそうなるよね