Identifying and enhancing motion video in a conference call channel by detecting audio

摘要

Presented herein are techniques for detecting whether a presentation video stream in a conference call includes motion video. In an embodiment, this can be done by detecting the presence of audio. The presence of audio suggests that the presentation video stream may include motion video. If audio is not detected, then the presentation video stream is encoded at a first frame rate. If audio is detected, then the presentation video stream is encoded at a second, higher frame rate to accommodate the motion video. The higher frame rate allows for a better viewing experience by conference participants.

主权项

1. A method comprising:
at a device from which a presentation is shared in a conference session, wherein the presentation comprises a main video stream and a presentation stream:
determining if audio is present in the presentation stream as indicative of a presence of embedded video content in the presentation stream;generating an audio detection indicator signal indicative of the presence of the audio in the presentation stream;supplying the audio detection indicator signal to a video encoder to enable encoding of the presentation stream at a first frame rate or second frame rate, wherein the second frame rate is greater than the first frame rate;dynamically changing the frame rate at which the presentation stream is encoded depending on the audio detection indicator signal such that if the audio detection indicator signal indicates that audio is not present in the presentation stream, encoding the presentation stream at the first frame rate, and if the audio detection indicator signal indicates that audio is present in the presentation stream, encoding the presentation stream at the second frame rate;wherein the generating and the supplying of the audio detection signal are performed after the determining if audio is present and before the encoding of the presentation stream.