CA2159466A1 - Synchronized clocks and media players - Google Patents

Synchronized clocks and media players

Info

Publication number
CA2159466A1
CA2159466A1 CA002159466A CA2159466A CA2159466A1 CA 2159466 A1 CA2159466 A1 CA 2159466A1 CA 002159466 A CA002159466 A CA 002159466A CA 2159466 A CA2159466 A CA 2159466A CA 2159466 A1 CA2159466 A1 CA 2159466A1
Authority
CA
Canada
Prior art keywords
objects
player
clock
order
rootclock
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002159466A
Other languages
French (fr)
Other versions
CA2159466C (en
Inventor
Frederick L. Malouf
Erik R. Neumann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Apple Inc
Original Assignee
Frederick L. Malouf
Erik R. Neumann
Kaleida Labs, Inc.
Object Technology Licensing Corporation
Apple Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Frederick L. Malouf, Erik R. Neumann, Kaleida Labs, Inc., Object Technology Licensing Corporation, Apple Inc. filed Critical Frederick L. Malouf
Publication of CA2159466A1 publication Critical patent/CA2159466A1/en
Application granted granted Critical
Publication of CA2159466C publication Critical patent/CA2159466C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234318—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into objects, e.g. MPEG-4 objects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/40—Information retrieval; Database structures therefor; File system structures therefor of multimedia data, e.g. slideshows comprising image and additional audio data
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
    • H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device

Abstract

A media player and the clock which controls it are integrated into a single object This integration may be achieved by the construct of inheritance between objects in an object oriented programming environment.
A software class for player objects is established which inherits from a software class for clock objects. In this way, a player "is a"
clock. This integration provides improved synchronization among different media, and simplifies design of applications which employ player objects and clock objects. Each object is synchronized to a RootClock object which operates at the speed of the fastest media player in the system. The RootClock may be separated into "low"
order and "high" order components and a compare register in order to induce interrupt overhead.
CA002159466A 1993-03-31 1994-03-31 Synchronized clocks and media players Expired - Lifetime CA2159466C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/041,395 1993-03-31
US08/041,395 US5452435A (en) 1993-03-31 1993-03-31 Synchronized clocks and media players
PCT/US1994/003582 WO1994023387A1 (en) 1993-03-31 1994-03-31 Synchronized clocks and media players

Publications (2)

Publication Number Publication Date
CA2159466A1 true CA2159466A1 (en) 1994-10-13
CA2159466C CA2159466C (en) 2005-03-22

Family

ID=21916294

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002159466A Expired - Lifetime CA2159466C (en) 1993-03-31 1994-03-31 Synchronized clocks and media players

Country Status (7)

Country Link
US (1) US5452435A (en)
EP (1) EP0692123B1 (en)
JP (1) JP3476462B2 (en)
AU (1) AU680488B2 (en)
CA (1) CA2159466C (en)
DE (1) DE69425054T2 (en)
WO (1) WO1994023387A1 (en)

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US6084979A (en) * 1996-06-20 2000-07-04 Carnegie Mellon University Method for creating virtual reality
US6105145A (en) * 1997-02-27 2000-08-15 Masterpiece Software, Ltd. System and method for generating high resolution clockticks in a computer system
US5815689A (en) * 1997-04-04 1998-09-29 Microsoft Corporation Method and computer program product for synchronizing the processing of multiple data streams and matching disparate processing rates using a standardized clock mechanism
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US6701383B1 (en) * 1999-06-22 2004-03-02 Interactive Video Technologies, Inc. Cross-platform framework-independent synchronization abstraction layer
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US7391791B2 (en) * 2001-12-17 2008-06-24 Implicit Networks, Inc. Method and system for synchronization of content rendering
US7627808B2 (en) * 2003-06-13 2009-12-01 Microsoft Corporation Computer media synchronization player
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US20070006065A1 (en) * 2005-07-01 2007-01-04 Microsoft Corporation Conditional event timing for interactive multimedia presentations
US8020084B2 (en) 2005-07-01 2011-09-13 Microsoft Corporation Synchronization aspects of interactive multimedia presentation management
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US20080077489A1 (en) * 2006-09-21 2008-03-27 Apple Inc. Rewards systems
US20080076972A1 (en) * 2006-09-21 2008-03-27 Apple Inc. Integrated sensors for tracking performance metrics
US8956290B2 (en) * 2006-09-21 2015-02-17 Apple Inc. Lifestyle companion system
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US8576922B2 (en) * 2007-06-10 2013-11-05 Apple Inc. Capturing media in synchronized fashion
US8433812B2 (en) * 2008-04-01 2013-04-30 Microsoft Corporation Systems and methods for managing multimedia operations in remote sessions
US20090322760A1 (en) * 2008-06-26 2009-12-31 Microsoft Corporation Dynamic animation scheduling
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US8856212B1 (en) 2011-02-08 2014-10-07 Google Inc. Web-based configurable pipeline for media processing
US8681866B1 (en) 2011-04-28 2014-03-25 Google Inc. Method and apparatus for encoding video by downsampling frame resolution
US9106787B1 (en) 2011-05-09 2015-08-11 Google Inc. Apparatus and method for media transmission bandwidth control using bandwidth estimation
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Also Published As

Publication number Publication date
EP0692123A1 (en) 1996-01-17
EP0692123B1 (en) 2000-06-28
US5452435A (en) 1995-09-19
DE69425054T2 (en) 2001-03-08
WO1994023387A1 (en) 1994-10-13
JPH08511891A (en) 1996-12-10
JP3476462B2 (en) 2003-12-10
CA2159466C (en) 2005-03-22
AU6418994A (en) 1994-10-24
AU680488B2 (en) 1997-07-31
DE69425054D1 (en) 2000-08-03

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Effective date: 20140331