Browse Prior Art Database

METHOD OF VIDEO PLAYBACK NAVIGATION IN MOBILE DEVICES

IP.com Disclosure Number: IPCOM000244645D
Publication Date: 2016-Jan-04
Document File: 5 page(s) / 147K

Publishing Venue

The IP.com Prior Art Database

Related People

Yasi Xi: AUTHOR [+4]

Abstract

A method is presented herein for accurate navigation of video playback or online meeting recording playback on mobile devices. With the method, a user is able to locate the frame he is looking for with both fast speed and accuracy. A variable radius spiral gesture provides both fast speed and accuracy. It is simple and easy to implement. It can be applied to a variety of video-playback-like applications in mobile devices, for example, online/offline video playing, meeting recording playback, etc.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 49% of the total text.

Page 01 of 5

METHOD OF VIDEO PLAYBACK NAVIGATION IN MOBILE DEVICES

AUTHORS:

  Yasi Xi Mingfeng Yang Jimmy Li Kent Chen

CISCO SYSTEMS, INC.

ABSTRACT

    A method is presented herein for accurate navigation of video playback or online meeting recording playback on mobile devices. With the method, a user is able to locate the frame he is looking for with both fast speed and accuracy. A variable radius spiral gesture provides both fast speed and accuracy. It is simple and easy to implement. It can be applied to a variety of video-playback-like applications in mobile devices, for example, online/offline video playing, meeting recording playback, etc.

DETAILED DESCRIPTION

     When trying to playback an online meeting recording or play video from a streaming website on mobile devices, a slide progress bar in a meeting recording player or streaming application can be used to navigate to a video frame and resume playback from there. The meeting recording or online video could be so long that a small movement of a progress bar corresponds to one minute forward or backwards. However, the frame that it is desired to navigate to may be between the one minute duration, and there is no easy way to accurately navigate to it.

    Presented herein is a method for quick and accurate navigation of video playback. The idea is to introduce a floating progress bar and a spiral gesture. When playing back an online meeting recording or playing online video, the user can make a spiral gesture on a touch-screen of a mobile device, clockwise to advance forward or anti-clockwise to rewind. See Figure 1 below.

Copyright 2016 Cisco Systems, Inc.

1


Page 02 of 5

Figure 1

    As illustrated by Figure 2 below, arcs with the same angle (in degrees) but different radius have a different length. The bigger the radius, the longer the length of the arc.


l1 = alpha * r1


l2 = alpha * r2

l3 = alpha * r3

As the bigger radius is fanned, the longer distance is scrolled up or down.

Similarly, the bigger the radius of the spiral gesture, the faster the scrolling up or down. As the bigger radius is fanned, the longer arc is fanned, and the longer distance is scrolled up or down. However, arcs with the same angle but different radius correspond to the same distance of scrolling up or down.

Figure 2

Copyright 2016 Cisco Systems, Inc.

2


Page 03 of 5

    Three points which are not in the same line will make a unique circle which passes through the three points, as shown in Figure 3 below.

Figure 3

    As shown in Figure 4 below, when a user makes a spiral gesture, finger points are captured every delta_t milliseconds and a sample point sequence of P1, P2 ... P14 is captured. Every three neighboring sample points make a unique circle with a fixed radius and angle. For example, P1, P2 and P3 make a circle with r1 and alpha1 while P9,P10 and P11 make a circle with r9 and alpha9. If three neighboring points are examined to be in the same line, a default fixed radius rdefault and fan angle alphadefault will be ad...