Method of storing data in a multimedia file using relative timebases

• US 20040004885A1
• Filed: 02/13/2003
• Published: 01/08/2004
• Est. Priority Date: 08/14/2000
• Status: Active Grant

• Current Assignee: Wi-LAN Inc.
• Original Assignee: Alcatel SA (Nokia Corporation)
• Inventors: Comps, Christophe, Boudet, Daniel, Sarremejean, Xavier
• Granted Patent: US 7,337,175 B2
• Time in Patent Office: Days
• US Class Current: 365/222
• CPC Class Codes: G06F 16/40 of multimedia data, e.g. slideshows comprising image and additional audio data retrieval of still image data G06F16/50; retrieval of audio data G06F16/60; retrieval of video data G06F16/70
• CPC Class Codes: G06F 16/489 using time information
• CPC Class Codes: Y10S 707/99931 Database or file accessing

Abstract

The invention concerns a method for storing data in a multimedia file, the multimedia file containing an absolute time base indicator and at least a track wherein the data are stored. Said data comprise time values. The method is characterised in that it consists in associating with each track; at least a relative time base indicator which is a function of said absolute time base, and in determining some or all the time values contained in a track, with respect to a relative time base indicator associated with said track.

Claims

1. A method of storing data in a multimedia file containing on absolute timebase indicator and at least one track in which said data is stored, said data including time values, and said method being characterized in that each track is associated with at least one relative timebase indicator, as a function of said absolute timebase, and in that some or all time values contained in a track are determined relative to a relative timebase indicator associated with said track.

2. A method according to claim 1, wherein each relative timebase indicator is stored in the track with which it is associated.

3. A method according to either claim 1 or claim 2, wherein each of said tracks is dedicated to a single type of data.

4. A method according to any preceding claim, wherein each relative timebase indicator is defined as the highest common factor of the time values contained in the track with which it is associated.

5. A method according to any of claims 1 to 3, wherein a plurality of relative timebase indicators are associated with the same track and each of said relative timebase indicators is associated uniquely with a portion of said track.

6. A method according to the preceding claim, wherein each relative timebase indicator is defined as the highest common factor of the time values contained in the portion with which it is associated.

7. A method according to either claim 5 or claim 6, wherein each time value is defined relative to the relative timebase indicator that precedes it in the track containing it.