WO2001076250A1 - Affichage en continu d'informations multimedia - Google Patents

Affichage en continu d'informations multimedia Download PDF

Info

Publication number
WO2001076250A1
WO2001076250A1 PCT/US2001/010877 US0110877W WO0176250A1 WO 2001076250 A1 WO2001076250 A1 WO 2001076250A1 US 0110877 W US0110877 W US 0110877W WO 0176250 A1 WO0176250 A1 WO 0176250A1
Authority
WO
WIPO (PCT)
Prior art keywords
segment
file
multimedia information
presentation
loading
Prior art date
Application number
PCT/US2001/010877
Other languages
English (en)
Inventor
Josh Abramowitz
Samual J. Aaronson
Original Assignee
Learningaction, 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 Learningaction, Inc. filed Critical Learningaction, Inc.
Priority to AU2001249818A priority Critical patent/AU2001249818A1/en
Publication of WO2001076250A1 publication Critical patent/WO2001076250A1/fr

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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/4143—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a Personal Computer [PC]
    • 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
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/458—Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/65—Transmission of management data between client and server
    • H04N21/658—Transmission by the client directed to the server
    • H04N21/6587—Control parameters, e.g. trick play commands, viewpoint selection
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17318—Direct or substantially direct transmission and handling of requests

Definitions

  • This invention relates to presenting information, and more particularly to streaming multimedia information.
  • Server computers are often used to present information over a network, such as the Internet, an extranet or an intranet, for display on a client computer.
  • the presented information may be a time-ordered sequence, or stream, of multimedia information, such as image frames captured from a moving object or sound amplitude signals associated with a sound or voice.
  • the presenting of a stream of multimedia information is sometimes referred to as streaming.
  • Macromedia FlashTM available from Macromedia Inc., is sometimes used to display files representing multimedia streams.
  • the Macromedia files contain a multimedia presentation consisting of a timeline of frames.
  • the frames may contain graphics with associated audio, similar to the frames in a movie clip.
  • Each frame is displayed for a time period associated with the timeline before the next frame in the timeline is displayed.
  • the frames are displayed in sequence, creating an animated picture.
  • the frames may contain commands that cause Macromedia Flash 1 M to perform actions that are associated with the commands.
  • An upper mutlimedia stream may be overlapped on a lower multimedia stream to obstruct the lower stream.
  • the graphics displayed on the upper stream may contain a transparent portion to allow a user to view a corresponding portion of the lower stream through the transparent portion.
  • the ordering of overlapped streams is determined using a numeric property of the streams known as a "level", which is specified by the creator of the presentations. A stream with a particular level overlaps all other streams that have a lower level than the particular level.
  • one aspect of the invention relates to a method of presenting multimedia information including: loading a first segment of the multimedia information; displaying the first segment; loading a second segment of the multimedia information, the loading of at least a portion of the second segment being concurrent with the displaying of the first segment; and displaying the second segment after displaying the first segment.
  • another aspect of the invention relates to a multimedia presentation, stored on a computer-readable medium, including: a first segment of multimedia information, a second segment of multimedia information, and a control file for causing a processor to perform the previously described method.
  • yet another aspect of the invention relates to a multimedia presentation including a control file for causing a processor to perform the previously described method.
  • the invention reduces the delay between the end of the playing of the first segment and the beginning of the playing of the second segment by loading at least a portion of the second segment while the first segment is playing.
  • Loading the multimedia information in segments also reduced the total memory or hard disk storage required to display the multimedia information.
  • Embodiments of the invention may include one or more of the following features. At least one of the first segment and the second segment is loaded over a computer network, such as the Internet, an intranet, or an extranet.
  • the loading of the multimedia information in segments allows the information to be loaded over an interminent network connection that might not allow all the information to be loaded all at once.
  • At least one of the first and second segments is loaded from storage associated with a computer system, which may or may not be connected to a network.
  • the second segment is loaded after the loading of the first segment is completed, thereby reducing the delay before the first segment can be displayed by using the entire loading capacity of the system to load the first segment that will be displayed.
  • At least one of the first segment and the second segment is loaded into a memory associated with a computer system.
  • At least one of the first and second segments is represented in a Macromedia flash file or in a format selected from a group including Real Video, Quicklime, and Windows Media.
  • the first segment is loaded into a higher level than the second segment so that multimedia information associated with the first segment obstructs multimedia information associated with the second segment for at least a portion of the time when the first segment is being displayed. This allows the second segment to be loaded while the first segment is still playing, without obstructing the first segment.
  • the first segment includes a sequence of frames, the last frame of the sequence being transparent, thereby revealing multimedia information associated with the second segment. Thus the appearance of a seamless transition between the segments of the multimedia presentation is created.
  • the method further includes unloading the first segment and then loading a third segment of multimedia information subsequent to the unloading of the first segment.
  • the computing resources such as memory or disk space required to display the multimedia information is reduced as only two segments are concurrently resident on the computer.
  • the method further includes, prior to displaying the second segment: loading a marker file to indicate that the first segment has been displayed. This allows the multimedia presentation to track the segments that have been viewed by different users of the multimedia presentation.
  • the method further includes: playing the marker file; playing a timer file; checking whether the playing of the marker file is completed before the playing of the timer file is completed.
  • the multimedia presentation can determine whether the playing of the marker file has taken longer than the predetermined time it takes to play the timer file. This allows the multimedia presentation to detect a break in the data path used to load the multimedia segments.
  • FIG. 1 is a block diagram of a network of computers including server for streaming multimedia to client computers;
  • FIG. 2A is a snapshot of a multimedia stream displayed on a client computer of FIG. 1;
  • FIG. 2B is a block diagram of the server of FIG. 1 :
  • FIG. 3 is a flow chart of a procedure for streaming multimedia, for example, using a base control file, a main control file, a play-loop file, a timer file, a mark chapter file, and a Macromedia Flash chapter file;
  • FIG. 4A is a high-level representation of the base control file of FIG. 3;
  • FIG. 4B is a high-level representation of the play-loop file of FIG. 3;
  • FIG. 5 A is a high-level representation of a startup sequence of the main control file of FIG. 3;
  • FIG. 5B is a high-level representation of a main loop of the main control file of FIG. 3;
  • FIG. 6 is a high-level representation of the Macromedia Flash chapter file of FIG. 3.
  • FIG. 7 is a flow chart of the operations of the mark chapter and the timer files of FIG. 3.
  • a server 1 streams multimedia information 2 over a network 6 to multiple users 4a-4d.
  • the network 6 includes the Internet 3. an intranet 5, and an extranet (not shown).
  • a user may directly access the multimedia information using a web browser on a display associated with the server I.
  • a user 4a-4d may view the multimedia information 2 on a suitably equipped client computer that has a web browser 20 by typing a uniform resource location (URL) associated with the multimedia information in an address input 23 of the web browser 20.
  • the multimedia information includes an animated image 21, text 22 (which may or may not be animated), and a sound signal (not shown).
  • An image 24 that is not animated is also included with the multimedia information 2.
  • the web browser requires additional software, such as a Macromedia Flash plugin, to display the multimedia presentation.
  • Other embodiments may use other plugins or stand-alone programs, such as RealPlayer I M by RealNetworks Inc., a Windows Media Viewer rM by Microsoft lnc, and so forth, to display the multimedia information 2.
  • RealPlayer I M by RealNetworks Inc.
  • Windows Media Viewer rM by Microsoft lnc
  • the server 1 includes a processor 40 for executing computer instructions and storage 27 associated with the processor 40.
  • Storage 27 may be a computer memory, a hard disk, a hard disk array, a tape disk, a floppy disk or a CDROM.
  • Server 1 also includes a multimedia server 25, which is a software program executed by the processor 40 to present multimedia information.
  • the multimedia server program may be stored in storage 27 and retrieved prior to being executed by the processor 40.
  • the presented information is also stored in storage 27.
  • the multimedia information contains chapter files 28. a main control file 29, a base control file 30, a timer file 31, a mark chapter file 32 and a play loop file 33.
  • Each chapter file 28 represents a chapter or a segment of a multimedia presentation associated with the chapter file.
  • the chapter files associated with a particular multimedia presentation are presented in sequence by the server 1 over the network 6 and displayed to the user 4a-4d on the web browser 20. While the web browser 20 is displaying a current chapter file, the subsequent chapter file in the multimedia stream is concurrently downloaded from the server 1 by a processing thread on the client computer.
  • the functions of the other 29-33 multimedia files will be explained later.
  • the process begins by setting 300 the current level that will be used by the multimedia presentation to a value (30) that is larger than the sum of 3 and the number of chapter files associated with the multimedia presentation.
  • the process also sets 301 the current chapter being processed to an initial value of one, and initiates 302 the loading of the current chapter into the current level.
  • the current level is a segment of memory associated with an ordering of overlapping multimedia streams.
  • the current level may also be segment of hard disk or hard disk array, e.g., as part of a virtual memory system of a computer operating system.
  • the process checks 303 whether the loading of the current chapter into the current level has been completed, and waits for the loading to be completed before proceeding.
  • the process When loading into the current level is completed, the process initiates 304 the playing of the chapter in the current level. Other embodiments may begin playing portions of the current chapter that are already loaded before the entire current chapter is fully loaded, to minimize delays.
  • the process also initiates 305 the loading of the chapter subsequent to the current chapter into the level below the current level. By waiting 303 for the loading 302 of the current chapter to be completed before loading 305 the subsequent chapter, the process uses the network connection optimally to minimize the waiting time before the current chapter can be played.
  • the playing of the current chapter 304 and the loading of the subsequent chapter 305 are performed by separate processing threads, which are executed virtually concurrently, for example, by a multi-processing operating system or by a parallel processing computer.
  • the process downloads a subsequent chapter while the current chapter is being viewed, thereby reducing or eliminating the waiting time between the end of the current chapter and the start of the subsequent chapter.
  • the process checks 306 whether the playing of the chapter in the current level has been completed and waits for the playing to be completed before proceeding. When the playing of the current chapter is completed, the process increments 307 the current chapter and decrements 308 the current level, thereby advancing to the subsequent chapter. The process then notifies 309 the server 1 that a chapter has been completely viewed and goes to step 303 to wait for the loading of the new current chapter, which was previously initiated in step 305.
  • the process of Fig. 3 can be implemented using a suitably configured set of Macromedia Flash files.
  • the multimedia stream is divided into several chapter files 28 (FIG. 2B), which are configured in a particular way, and a series of control files 29-33 (FIG. 2B), which control the presentation of the chapter files.
  • a base control file 30 initiates the presentation process, while a play-loop file 33 controls the playing of the first chapter file.
  • a main control file 29 controls the start-up sequence of the process, and contains the loop that controls the presentation of subsequent chapter files.
  • the base control file is the first of the multimedia presentation files to be loaded onto the user's computer 4a-4d.
  • the base control file is loaded into level 0, and is automatically played by Macromedia flash.
  • the base control file loads 401 the main control file 29 into level 1 and then sends 402 a play signal to the main control file.
  • the base control file then stops.
  • the main control file 29 plays the first multimedia chapter file of the presentation using the play loop file 33.
  • the play loop file 33 checks 453 to see if the loading of the first multimedia chapter file is done. If the loading is not done, the play loop file 33, sends 454 a play signal to the contents of the level where the first chapter is being loaded and waits for the loading to be completed. When the loading is completed, the play loop file 33 stops.
  • the main control file begins by setting 501 the current level and the current chapter to 30 and 1, respectively.
  • the main control file then initiates 502 the loading of the current chapter into the current level.
  • a separate processing thread is executed concurrently with the main control file to perform the actual loading, for example, by a multi-processing operating system or a parallel processing computer.
  • the main control file then loads 503 the play-loop file into level 2 and initiates 504 the playing of the play-loop file (which checks 453 the loading of the current chapter and sends 455 a play signal to the main control file when the loading is complete, as described for Fig. 4B above).
  • the main control file then checks 505 whether a play signal has been received from the first chapter file to indicate that the first chapter file has been fully loaded, and waits for the play signal if it has not been received.
  • the main control file 29 unloads 506 the play loop file from level 2.
  • the control file decrements 507 the current level and increments 507 the current chapter to indicate that it is ready to load the subsequent chapter in the multimedia stream in the level immediately below the most recently loaded chapter.
  • the main control file initiates 508 the loading of the new current chapter in the new current level.
  • the main control file then checks 509 whether it has received a play signal from the first chapter indicating that the first chapter has completed playing. If the play signal has not been received, the main control file waits for the play signal.
  • the main control file 29 initiates 510 the playing of the current level.
  • the main control file then unloads 511 the first chapter file, and loads 51 1 the timer file 31 and the mark chapter file 32 into levels 2 and 3, to indicate to the server 1 that a chapter has been displayed in full.
  • the main control file continues at step 551 (Fig. 5B).
  • the main control file 29 checks 551, whether it has received a play signal from the current chapter indicating that the current chapter has been fully loaded, and waits for the play signal if it has not yet received the signal.
  • the control file decrements 552 the current level and increments 552 the current chapter to indicate that it is now ready to load the next chapter in the level below the most recently loaded chapter.
  • the main control file then initiates 553 the loading of the new current chapter into the new current level (which is also done by a separate concurrent thread).
  • the main control file then checks 554 whether it has received a play signal from the previous chapter indicating that the playing of the previous chapter is complete, and awaits the signal if it has not yet been received.
  • the main control file 29 initiates 555 the playing of the new current chapter and unloads 556 the previous chapter from the previous level.
  • the main control file also loads the timer file 31 into level 2 and loads the mark-chapter file 32 into level 3 to indicate to the server 1 that another chapter has been displayed in full.
  • the main control file then proceeds to step 551 , and repeats the process of loading and playing chapter files in sequence as described above.
  • the main control file 29 displays a sequence of chapters in a control loop by immediately commencing the loading of a current chapter file when the loaiding of a previous file is complete, thereby loading the current file while the previous file is being displayed.
  • the control file also unloads a fully displayed chapter file before loading a new chapter file, thereby, reducing the total memory or storage required to stream the multimedia information.
  • the chapter file displays 601 a pre-loading sequence associated with the chapter file.
  • the preloading sequence may depict an hourglass, indicating that the chapter file is busy preloading. Alternatively, the preloading sequence may depict a sliding scale, showing how much of the chapter file has been loaded.
  • the pre-loading sequence then checks 602 whether the chapter has been fully loaded. If the chapter file has not been fully loaded, the chapter file updates the pre-loading sequence to reflect the state of the loading process and then checks 602 again whether the chapter has been fully loaded.
  • the chapter file 28 When the chapter file 28 is fully loaded, the chapter file sends 603 a play signal to the main control file to notify the main control file that the loading is complete and that a subsequent chapter file can now be loaded. Thus the process speeds up the loading of the next chapter file by only loading one chapter file at a time, thereby maximizing the available loading bandwidth.
  • the chapter file then checks 604 whether it has received a play signal from the main control file. If the chapter file has not received a play signal, the chapter file waits for the play signal.
  • the chapter file 28 When the chapter file 28 receives a play signal, the chapter file displays 605 the multimedia content associated with the chapter file.
  • the content may be a time ordered sequence of frames which when displayed in sequence depicts an animated picture.
  • the chapter file displays a transparent frame 606, which allows the user to view multimedia information associated with a chapter file at a lower level than the current level. Since the subsequent chapter file is preloaded into a lower level, this allows the user to immediately view the multimedia content of a subsequent chapter when the current chapter comes to an end. thereby creating the appearance of a seamless transition between the chapter files.
  • the current chapter file then sends 607 a play signal to the main control file to indicate that the all the content has been displayed and stops 608.
  • the mark chapter file 32 is loaded by the main control loop to indicate to the server 1 , that a chapter has been fully viewed.
  • the server 1 maintains a record of what chapters have been viewed by each user. This information can be used to determine whether a user has viewed all the chapter files in a multimedia presentation, which may, for example, be an online class.
  • the timer file 31 is used to determine whether the loading of the mark chapter file 32 has taken longer than the predetermined time require to play the timer file, thereby detecting problems with the network connection to the server 1.
  • the mark chapter file 32 After the mark chapter file 32 is loaded 701 by the main control loop file into level 2, the mark chapter file plays 702.
  • the loading 701 of the mark chapter file informs the server that the user 4a-4d has completed a chapter of the multimedia presentation.
  • the browser may send a load request to the server 1 that contains information about the chapter that has just been played and the identity of the user that is logged onto the browser.
  • the timer file is then loaded 703 by the main control loop file into level 3 (although other embodiments may load the timer file before or concurrently with the mark chapter file).
  • the timer file After the timer file has begun to play 704, the timer file checks 705 whether the timer file has completed playing. The timer file takes a known length of time to finish playing.
  • the mark chapter file checks 706 whether the mark chapter file has also completed playing. If the mark chapter has also completed playing, the timer file stops. Otherwise, if the timer file completes playing before the mark chapter file, then there is a problem with the connection to the server. The timer file reports 708 the problem with the connection on the web browser 20 to the user. The timer file logs out the user from the server and stops.
  • the mark chapter file checks 707 whether the mark chapter file has completed playing. If the mark chapter file has not completed playing, the process proceeds to step 705. Otherwise, the mark chapter file unloads 702 the timer file from level 2 and stops. Thus the main control loop informs the server 1 of the users progress through the multimedia presentation using the mark chapter file. The timer file is used to ensure that the server 1 responds to the mark chapter request.
  • the files can be loaded and unloaded by, respectively, executing the "load movie” and “unload movie” clauses, while the status of the loading of a file can be checked using the "If frame loaded” clause of Macromedia Hash.
  • the invention can be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or in combinations of them.
  • Apparatus of the invention can be implemented in a computer program product tangibly embodied in a machine-readable storage device for execution by a programmable processor; and method steps of the invention can be performed by a programmable processor executing a program of instructions to perform functions of the invention by operating on input data and generating output.
  • the invention can be implemented advantageously in one or more computer programs that are executable on a programmable system including at least one programmable processor coupled to receive data and instructions from, and to transmit data and instructions to, a data storage system, at least one input device, and at least one output device.
  • Each computer program can be implemented in a high-level procedural or object oriented programming language, or in assembly or machine language if desired; and in any case, the language can be a compiled or interpreted language.
  • Suitable processors include, by way of example, both general and special purpose microprocessors.
  • a processor will receive instructions and data from a read-only memory and/or a random access memory.
  • a computer will include one or more mass storage devices for storing data files; such devices include magnetic disks, such as internal hard disks and removable disks; magneto-optical disks; and optical disks.
  • Storage devices suitable for tangibly embodying computer program instructions and data include all forms of non- volatile memory, including by way of example semiconductor memory devices, such as EPROM, EEPROM, and flash memory
  • I I devices magnetic disks such as internal hard disks and removable disks; magneto- optical disks; and CDROM disks. Any of the foregoing can be supplemented by, or incorporated in, ASICs (application-specific integrated circuits).
  • ASICs application-specific integrated circuits
  • the multimedia chapter files need not be represented in Macromedia Flash files. They may be represented in Real Video, Real Audio, MPEG, Quick-time, and Windows Media formats, to mention a few.
  • the control file need not contain actual commands. The commands may be written into a computer program that performs a similar function based on a reduced control file that only contains a listing of the chapter files to be streamed.
  • the multi-media files do not have to be loaded over a network. They may be loaded from storage, such as a CDROM device, a tape device, a hard disk, or a disk drive array, associated with the user's 4a-4d computer. Accordingly, other embodiments are within the scope of the following claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

L'invention concerne un procédé de présentation d'informations multimédia (20) consistant à charger un premier segment (302) des informations multimédias, à charger un second segment (305), le chargement d'au moins une partie du second segment étant simultané à l'affichage du premier segment, et à afficher le second segment après affichage du premier.
PCT/US2001/010877 2000-04-04 2001-04-04 Affichage en continu d'informations multimedia WO2001076250A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001249818A AU2001249818A1 (en) 2000-04-04 2001-04-04 Streaming multimedia information

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54217200A 2000-04-04 2000-04-04
US09/542,172 2000-04-04

Publications (1)

Publication Number Publication Date
WO2001076250A1 true WO2001076250A1 (fr) 2001-10-11

Family

ID=24162640

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/010877 WO2001076250A1 (fr) 2000-04-04 2001-04-04 Affichage en continu d'informations multimedia

Country Status (2)

Country Link
AU (1) AU2001249818A1 (fr)
WO (1) WO2001076250A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016131022A1 (fr) * 2015-02-12 2016-08-18 Glowforge Inc. Fabrication au laser commandée en nuage
US10509390B2 (en) 2015-02-12 2019-12-17 Glowforge Inc. Safety and reliability guarantees for laser fabrication
US10551824B2 (en) 2016-11-25 2020-02-04 Glowforge Inc. Controlled deceleration of moveable components in a computer numerically controlled machine
US10737355B2 (en) 2016-11-25 2020-08-11 Glowforge Inc. Engraving in a computer numerically controlled machine
US10802465B2 (en) 2016-11-25 2020-10-13 Glowforge Inc. Multi-user computer-numerically-controlled machine
US11137738B2 (en) 2016-11-25 2021-10-05 Glowforge Inc. Calibration of a computer-numerically-controlled machine
US11249456B2 (en) 2016-11-25 2022-02-15 Glowforge Inc. Fabrication with image tracing
US11305379B2 (en) 2016-11-25 2022-04-19 Glowforge Inc. Preset optical components in a computer numerically controlled machine
US11433477B2 (en) 2016-11-25 2022-09-06 Glowforge Inc. Housing for computer-numerically-controlled machine
US11698622B2 (en) 2021-03-09 2023-07-11 Glowforge Inc. Previews for computer numerically controlled fabrication
US11740608B2 (en) 2020-12-24 2023-08-29 Glowforge, Inc Computer numerically controlled fabrication using projected information

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0702493A1 (fr) * 1994-09-19 1996-03-20 International Business Machines Corporation Reproduction vidéo interactive
EP0803826A2 (fr) * 1996-04-22 1997-10-29 Sun Microsystems, Inc. Procédé applet dans un système de vidéo à la demande et appareil pour l'inclusion d'images vidéo animées dans des documents multimédia
WO1998033320A1 (fr) * 1997-01-29 1998-07-30 West-Walker, Francis, Nigel Procede de transfert de fichiers supports de donnees sur un reseau de communications

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0702493A1 (fr) * 1994-09-19 1996-03-20 International Business Machines Corporation Reproduction vidéo interactive
EP0803826A2 (fr) * 1996-04-22 1997-10-29 Sun Microsystems, Inc. Procédé applet dans un système de vidéo à la demande et appareil pour l'inclusion d'images vidéo animées dans des documents multimédia
WO1998033320A1 (fr) * 1997-01-29 1998-07-30 West-Walker, Francis, Nigel Procede de transfert de fichiers supports de donnees sur un reseau de communications

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Macromedia debuts flas 4 for distinctive, full-screen web experiences", 24 August 1999 (1999-08-24), XP002941827 *

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11327461B2 (en) 2015-02-12 2022-05-10 Glowforge Inc. Safety assurances for laser fabrication using temperature sensors
US10379517B2 (en) 2015-02-12 2019-08-13 Glowforge Inc. Cloud controlled laser fabrication
US10496070B2 (en) 2015-02-12 2019-12-03 Glowforge Inc. Moving material during laser fabrication
US10509390B2 (en) 2015-02-12 2019-12-17 Glowforge Inc. Safety and reliability guarantees for laser fabrication
US10520915B2 (en) 2015-02-12 2019-12-31 Glowforge Inc. Visual preview for laser fabrication
US11995159B2 (en) 2015-02-12 2024-05-28 Glowforge, Inc. Multi-function computer numerically controlled machine
US11880182B2 (en) 2015-02-12 2024-01-23 Glowforge Inc. Safety and reliability for laser fabrication
US11797652B2 (en) 2015-02-12 2023-10-24 Glowforge, Inc. Cloud controlled laser fabrication
US11537095B2 (en) 2015-02-12 2022-12-27 Glowforge Inc. Multi-function computer numerically controlled machine
US11231693B2 (en) 2015-02-12 2022-01-25 Glowforge Inc. Cloud controlled laser fabrication
US11537096B2 (en) 2015-02-12 2022-12-27 Glowforge Laser cutter engraver material height measurement
US11537097B2 (en) 2015-02-12 2022-12-27 Glowforge Inc. Visual preview for laser fabrication by assembling multiple camera images
WO2016131022A1 (fr) * 2015-02-12 2016-08-18 Glowforge Inc. Fabrication au laser commandée en nuage
US11338387B2 (en) 2016-11-25 2022-05-24 Glowforge Inc. Engraving in a computer numerically controlled machine
US11835936B2 (en) 2016-11-25 2023-12-05 Glowforge, Inc. Multi-user computer-numerically-controlled machine
US11433477B2 (en) 2016-11-25 2022-09-06 Glowforge Inc. Housing for computer-numerically-controlled machine
US11460828B2 (en) 2016-11-25 2022-10-04 Glowforge Inc. Multi-user computer-numerically-controlled machine
US11281189B2 (en) 2016-11-25 2022-03-22 Glowforge Inc. Controlled deceleration of moveable components in a computer numerically controlled machine
US11249456B2 (en) 2016-11-25 2022-02-15 Glowforge Inc. Fabrication with image tracing
US11137738B2 (en) 2016-11-25 2021-10-05 Glowforge Inc. Calibration of a computer-numerically-controlled machine
US10551824B2 (en) 2016-11-25 2020-02-04 Glowforge Inc. Controlled deceleration of moveable components in a computer numerically controlled machine
US10737355B2 (en) 2016-11-25 2020-08-11 Glowforge Inc. Engraving in a computer numerically controlled machine
US10802465B2 (en) 2016-11-25 2020-10-13 Glowforge Inc. Multi-user computer-numerically-controlled machine
US11305379B2 (en) 2016-11-25 2022-04-19 Glowforge Inc. Preset optical components in a computer numerically controlled machine
US11860601B2 (en) 2016-11-25 2024-01-02 Glowforge Inc. Calibration of a computer-numerically-controlled machine
US11860606B2 (en) 2016-11-25 2024-01-02 Glowforge, Inc. Fabrication with image tracing
US11740608B2 (en) 2020-12-24 2023-08-29 Glowforge, Inc Computer numerically controlled fabrication using projected information
US11698622B2 (en) 2021-03-09 2023-07-11 Glowforge Inc. Previews for computer numerically controlled fabrication

Also Published As

Publication number Publication date
AU2001249818A1 (en) 2001-10-15

Similar Documents

Publication Publication Date Title
KR101246976B1 (ko) 미디어 콘텐츠 렌더링의 특징
US7861150B2 (en) Timing aspects of media content rendering
US7743329B2 (en) Incorporating interactive media into a playlist
KR101265936B1 (ko) 대화형 멀티미디어 프레젠테이션 관리의 동기 특징
US8799757B2 (en) Synchronization aspects of interactive multimedia presentation management
KR101207050B1 (ko) 성능 인식 피어-투-피어 주문형 콘텐츠 서비스를 위한 대화식 재생 장치에 대한 지원
WO2001075612A1 (fr) Choix d'une presentation multimedia
US8020084B2 (en) Synchronization aspects of interactive multimedia presentation management
WO2001076250A1 (fr) Affichage en continu d'informations multimedia
CN112601127A (zh) 视频显示方法及装置、电子设备、计算机可读存储介质
JP2004140536A (ja) 再生装置及び再生方法
US10674226B2 (en) Video content replay
US20150312369A1 (en) Checkpoints for media buffering
US9628833B2 (en) Media requests for trickplay
KR101265840B1 (ko) 대화형 멀티미디어 프레젠테이션 관리의 동기 특징
JP2003289506A (ja) 映像・音声メディアとアプリケーションの同期管理装置、同期管理方法、同期管理プログラム及びその同期管理プログラムを記録した記録媒体
JP2008211718A (ja) 時間変化情報再生装置及びプログラム

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP