Abstract:
A method for digital multimedia composition including selecting multimedia data segments, arranging the selected multimedia data segments on a single storyline strip, inserting transitions between adjacent multimedia data segments on the storyline strip, and combining the selected multimedia data segments based on their arrangement on the storyline strip and based on the inserted transitions, to produce a multimedia output file from the storyline strip. A system is also described and claimed.

Description:
COPYRIGHT NOTICE 
     A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the reproduction by anyone of the patent document or the patent disclosure as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever. 
     FIELD OF THE INVENTION 
     The present invention relates generally to the field of information processing and, more particularly to a method and system for multimedia composition. 
     BACKGROUND OF THE INVENTION 
     In the past decade, video and audio magnetic tape have emerged as viable alternatives to traditional storage media such as silver halide film for recording, display and reproduction of images, sounds and video. Editing methods in the past originally stemmed from linear or sequential editing of film on a film device. Along with advances in storage media have come new methods of composition based on computerized digital editing techniques that have all but replaced manual editing of magnetic video and audio tape and related media. Digital composition software programs, such as those used to compose digital video, audio and related source materials, have found widespread application in multimedia presentation and authoring systems. Despite their power, these composition software programs require users to master complex interfaces, and adopt abstract representation models which are beyond the grasp of ordinary users. 
     For example, some prior art composition software programs include user interfaces that employ timeline-based, non-linear and non-spatial representations of what is inherently a temporal-based composition process making the composition software programs difficult to learn and use. The user interfaces are non-linear because various aspects of the composition are displayed as separate elements on different levels or layers. These composition software programs seek to mimic film based editing methods through the application of a timeline-based composition system and method. 
     However, unlike the film editor who has access to the visual scenes of a movie which he can cut and splice together to produce a desired sequence, the typical video editor has been forced to rely on computer software programs that simulate sequential frames of film on a timeline. The conventional non-linear digital editing method involves the use of computer software for displaying and manipulating a sequence of frames or images on a timeline typically with each frame individually displayed. Where multiple sequences are sought to be confined, each sequence is displayed on a separate, horizontal timeline. Audio to accompany the video is placed on a separate timeline. The video and/or audio sequences contained in each timeline are not viewable until a production stage is completed. While this method offers significant productivity gains over the complex and time-consuming task of manual editing, the timeline based method utilized in current non-linear digital video and audio composition systems is extremely complex, non-intuitive and cumbersome to use because of the multiple timelines or layers. 
     One of the problems with the prevailing non-linear composition method is that it breaks a composition into a non-temporal representation of multiple layers of image and/or audio sequences in what is inherently a temporal relationship. This method not only forces users to constantly switch between separate program modules to perform routine composition tasks for each layer, but greatly increases the complexity of the composition display due to the inherent need to accommodate multiple timelines or “layers”, each with its own associated images. A user is forced to mentally visualize the combined layers as well as their effects as editing is performed. Thus the composition process is, as a consequence, very complex and tedious. As a result, much of the power of these composition software programs is untapped by all but the most advanced users due to the inherent complexity that results from attempting to represent a spatial and temporal composition process by means of non-spatial, timeline-based models and methods. 
     U.S. Pat. No. 4,538,188 to Barker et. al. discloses a video composition method and apparatus utilizing non-linear timeline based composition. Each layer of the video composition method is presented as numerous individual images in a time sequence or timeline order. There are many inherent difficulties and inefficiencies associated with the prior art method that results from the display of temporal source materials in a non-temporal or timeline fashion. 
     However, despite its inherent limitations, the use of digital non-linear editing methods has increased significantly in recent years due to associated cost advantages offered over traditional video editing methods. Unfortunately, this departure from traditional video editing techniques has in some respects dampened the creative talents of modem video and audio directors who are no longer able to apply their skills directly to the composition process and must instead rely upon intermediate personnel to manipulate the image and audio sequences scattered across multiple timeline layers. Using the non-linear method of digital-based composition, the director&#39;s feel for the composition process is greatly diminished. One advantage of composing with the traditional physical editing method using silver halide film, is the ability to react quickly to the temporal nature of the media. Thus, a given sequence of film can be run back and forth, viewed repeatedly, edited and quickly “spliced” together with other sequences to form a completed segment. Thus the source material is treated as an entire object, one that can be combined with other objects to create a composition sequence. The ability to achieve this same effect in a digital non-linear editing environment is highly desirable. 
     It is therefore an object of the present invention to provide a novel non-timeline, non-linear digital multimedia method and system. 
     SUMMARY OF THE INVENTION 
     The non-timeline, non-linear digital composition system and method allow digital source material to be produced while providing the operator with instantaneous feedback. This significantly increases productivity, while at the same time lessens or removes the need for intermediate personnel. This also provides a highly intuitive and creative digital composition environment for non-technical users, editors and directors alike. The present composition method and system also provide a dynamic, intuitive and user-friendly object based composition environment for producing digital source materials for use with a wide variety of commercial applications, media and transmission mediums. 
     The present composition system includes system software control functions that are highly user interactive and respond to user commands for selecting audio, video and multimedia objects from source materials, displaying these dynamically in a main viewing area, performing one or more composition tasks, applying such composition tasks dynamically to the object, previewing the composited object and placing the finished video, audio and related multimedia source material sequences in a production storyline facility for real-time preview of the sequence composition, and for production of the completed sequence. 
     The composition system and method of the present invention treat digital source segments, including still frame images, video, audio, three dimensional objects, animation and related multimedia source materials as “digital objects” and allow for both temporal and accurate display. Furthermore, the composition system and method of the present invention allow for application of special effects “filters” that can be applied equally and dynamically to all digital objects in the composition process. Audio special effects filters can be applied directly to an audio file which in turn can be applied to an animated three dimensional video object such that it causes the object to react or modify its motion in a manner consistent with an audio (e.g., music) source file. 
     The present composition system and method do not rely on representing sequences as multiple static pictorial frames. Instead, the present composition system and method directly parallels the techniques employed in traditional physical film-based composition where editors view and work directly with temporal video and audio “objects” or film sequences that can be played back and forth, viewed, edited and enhanced in a dynamic, real time composing environment. Digital objects can be placed on the storyline in any desired order and can be dynamically manipulated and previewed by the operator at any time. Each digital object can be associated with a pictorial identifier. The identifier for the object can be drawn from any desired pictorial image source. In the case of video segments, the identifier representing a given object can be a single video frame selected either automatically by the system or manually by the operator. The present invention does not use separate frames or pictorial labels to denote the start and endpoint of given source material segments or sequences in a timeline as is characteristic of conventional, timeline-based digital composition systems and methods. 
     In the case of audio sources, representative object images are selected by the user from a library of representative audio images or automatically generated based on an analysis of the segment&#39;s audio wave patterns. Source materials and compositions referenced in the system&#39;s source material storage libraries can be grouped and sorted according to user specified criteria. Users can search for source materials stored on both local storage media as well as on-line and network media storage devices according to a wide range of user defined criteria and object properties. 
     There is thus provided in accordance with a preferred embodiment of the present invention a method for non-timeline, non-linear digital multimedia composition including representing multimedia materials stored in memory as objects, retrieving one or more of the multimedia materials from the memory for display on a composition console, dynamically viewing and editing the one or more multimedia materials on the composition console, placing the objects representing the one or more multimedia materials on a storyline strip of the composition console to create a storyline that is viewable on the composition console, the storyline strip including object viewing and object transition positions, and producing a multimedia output file from objects on the storyline. 
     There is further provided in accordance with a preferred embodiment of the present invention a system for non-timeline, non-linear digital multimedia composition, the system including means for representing multimedia materials stored in memory as objects, means for retrieving one or more of the multimedia materials from the memory for display on a composition console, means for dynamically viewing and editing the one or more multimedia materials on the composition console, means for placing the objects representing the one or more multimedia materials on a storyline strip of the composition console to create a storyline that is viewable on the composition console, the storyline strip including object viewing and object transition positions; and means for producing a multimedia output file from objects on the storyline. 
     There is yet further provided in accordance with a preferred embodiment of the present invention a computer readable media encoded with a computer program for creating non-timeline, non-linear digital multimedia compositions from multimedia materials stored in memory and represented by objects including means for retrieving one or more of the multimedia materials from the memory for display on a composition console, means for dynamically viewing and editing the one or more multimedia materials on the composition console, means for placing the objects representing the one or more multimedia materials on a storyline strip of the composition console to create a storyline that is viewable on the composition console, the storyline strip including object viewing and object transition positions, and means for producing a multimedia output file from objects on the storyline. 
     There is additionally provided in accordance with a preferred embodiment of the present invention a method for producing a multimedia composition including providing a user interface having a source material object window and a storyline strip, the storyline strip having object viewing and object transition positions, associating individual identifiers in the window with time varying dynamic multimedia source material objects, choosing one of the identifiers in the window to retrieve a selected source material object, dragging the chosen identifier across the interface to one of the object viewing positions on the storyline strip, repeating the choosing and dragging to organize a multi-object multimedia composition in a desired order, and generating a multimedia output file based on chosen identifiers organized on the storyline strip. 
     There is moreover provided in accordance with a preferred embodiment of the present invention a system for creating a multimedia composition from multimedia source material objects, the system including a user interface including a tool bar for accessing system functions, a source library window for accessing multimedia source material objects, a console for previewing and editing the multimedia source material objects to create output objects, and a storyline strip for assembling the output objects to form a multimedia output file, the storyline strip including object viewing and object transition positions, a processor for editing the source material objects and creating the multimedia output file in response to user input entered via the user interface, and a display for displaying the multimedia output file on the console. 
     There is further provided in accordance with a preferred embodiment of the present invention a system for producing a multimedia composition, the system including means for generating a user interface having a source material object window and a storyline strip, the storyline strip having object viewing and object transition positions, means for associating individual identifiers in the window with time varying dynamic multimedia source material objects, means for choosing one of the identifiers in the window to retrieve a selected object, means for placing the chosen identifier at one of the object viewing positions on the storyline strip to organize a multi-object, multi-media composition in a desired order, and means for generating a multimedia output file based on chosen identifiers organized on the storyline strip. 
     There is yet further provided in accordance with a preferred embodiment of the present invention a computer readable media encoded with a computer program for producing a multimedia composition from multimedia materials stored in memory as source material objects including means for generating a user interface having a source material object window and a storyline strip, the storyline strip having object viewing and object transition positions, means for associating individual identifiers in the window with time varying dynamic multimedia source material objects, means for choosing one of the identifiers in the window to retrieve a selected source material object from memory, means for placement of one or more chosen identifiers at selected positions on the storyline strip to organize a multi-object multimedia composition in a desired order, and means for generating a multimedia output based on chosen identifiers organized on the storyline strip. 
     There is additionally provided in accordance with a preferred embodiment of the present invention a method for digital multimedia composition including selecting multimedia data segments, arranging the selected multimedia data segments on a single storyline strip, inserting transitions between adjacent multimedia data segments on the storyline strip, and combining the selected multimedia data segments based on their arrangement on the storyline strip and based on the inserted transitions, to produce a multimedia output file from the storyline strip. 
     There is moreover provided in accordance with a preferred embodiment of the present invention a digital multimedia composition system including a user interface for selecting multimedia data segments, for arranging the selected multimedia data segments on a single storyline strip, and for inserting transitions between adjacent multimedia data segments on the storyline strip, and a processor combining the selected multimedia data segments based on their arrangement on the storyline strip and based on the inserted transitions, to produce a multimedia output file from the storyline strip. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     An embodiment of the present invention will now be described more fully with reference to the accompanying drawings in which: 
     FIG. 1A is a block diagram of a computer system for executing a non-timeline, non-linear digital multimedia composition program in accordance with the present invention; 
     FIG. 1B is a block diagram illustrating the relationship between the computer system of FIG. 1A and a computer software system; 
     FIG. 1C is a bitmap screen shot of a prior art composition interface illustrating a typical timeline-based, non-linear digital composition program; 
     FIG. 1D is a bitmap screen shot of a primary composition user interface of the non-timeline, non-linear digital multimedia composition program executed by the computer system of FIG. 1A including three dimensional tool bar icons, a source library component, a composition storyline component and a primary viewing console; 
     FIG. 1E is a bitmap screen shot of the animated three dimensional tool bar icons of FIG. 1D which can be activated to invoke functions; 
     FIG. 1F is a bitmap screen shot illustrating an example of the implementation of animation of one of the three dimensional tool bar icons of FIG. 1D; 
     FIG. 2A is a bitmap screen shot of the source library component of FIG. 1D used to store source materials and productions; 
     FIG. 2B is a bitmap screen shot of the composition storyline component of FIG. 1D illustrating how finished sequences and transition effects are arranged to create a finished composition sequence; 
     FIG. 2C is a bitmap screen shot of the primary viewing console of FIG. 1D used to display source materials and compositions and to manipulate video and audio segments using various composition tools accessible from the primary viewing console; 
     FIG. 2D is a bitmap screen shot of primary viewing console controls of FIG. 2C used to manipulate source materials (i.e. play, pause, advance, etc.) as well as time code indicators to set in and out points used in the editing of source materials for composition purposes; 
     FIG. 2E is a bitmap screen shot of primary viewing console controls of FIG. 2C used to access various composition tools and to display the active status of such tools; 
     FIG. 3A is a bitmap screen shot of video editor controls of the primary viewing console of FIG. 1D illustrating how color control variations are performed along with related composition operations; 
     FIG. 3B is a bitmap screen shot of transition composition controls of the primary viewing console of FIG. 1D; 
     FIG. 3C is a bitmap screen shot of text editing controls of the primary viewing console of FIG. 1D; 
     FIG. 3D is a bitmap screen shot of transition editing primary viewing controls of the console of FIG. 1D; 
     FIG. 3E is a bitmap screen shot of animation controls of the primary viewing console of FIG. 1D; 
     FIG. 3F is a bitmap screen shot of audio composition controls of the primary viewing console of FIG. 1D; 
     FIG. 3G is a bitmap screen shot of video capture controls of the primary viewing console of FIG. 1D; 
     FIG. 3H is a bitmap screen shot of a list of object properties accessible from the primary composition interface of FIG.  1 D. 
     FIG. 4A is a bitmap screen shot of composition pre-production controls on the primary viewing console of FIG. 1D; 
     FIG. 4B is a bitmap screen shot of the composition production controls of the primary viewing console of FIG. 1D; 
     FIG. 5A is a bitmap screen shot of general system options accessible from the primary composition interface of FIG. 1D; 
     FIG. 5B is a bitmap screen shot of source material dynamic preview options and controls accessible from the primary composition user interface of FIG. 1D; 
     FIG. 5C is a bitmap screen shot of composition production options and controls accessible from the primary composition user interface of FIG. 1D; 
     FIG. 5D is a bitmap screen shot of source material capture or acquisition options and controls accessible from the primary composition user interface of FIG. 1D; and 
     FIG. 5E is a bitmap screen shot of content capture driver options and controls accessible from the primary composition user interface of FIG.  1 D. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now to FIG. 1A, a computer system  10  for executing a non-timeline, non-linear digital multimedia composition program in accordance with the present invention to produce multimedia compositions is shown. The composition program when executed allows a user to select video, audio and multimedia objects from source materials and display the selected objects dynamically. Composition tasks can be performed and applied to the objects to create composite objects which can be previewed. Selected and composite objects can be placed in a production storyline for real-time preview. Specifics of the composition program and the computer system  10  will now be described. 
     As can be seen in FIG. 1A, computer system  10  includes a central processor  11 , a main memory  12 , an input/output controller  13 , a keyboard  14 , a pointing device  15  such as mouse, track ball, pen device, voice activated command system or the like, a display device  16 , a mass storage disk memory  17  such as a hard disk, a printing device  18  and, a video and audio input and output subsystem  21  for connection of devices such as audio and video cassette recorders, cameras, camcorders, microphones and the like. In the preferred embodiment, the pointing device  15  is a two-button mouse device, including both right and left “mouse buttons. Programming techniques and operations for mouse devices are well documented in the programming and hardware literature; such as Microsoft Mouse Programmer&#39;s Reference, Microsoft Press, 1989. Additional input/output devices, such as a digital tape (not shown), devices for access to live video and audio streams from network, internet and broadcast media; and related systems may be included in the computer system  10  as desired. 
     As illustrated, the various components of the computer system  10  communicate through a system bus  20  or similar architecture. In the preferred embodiment, the computer system  10  includes an IBM®-compatible personal computer, which is available from multiple vendors (including IBM of Armonk, N.Y.). It is within the scope of this invention that other computer designs can be used. 
     In response to user movement signals from the mouse  15 , a pointer floats (i.e. moves freely) across the display device  16  to a desired location. During or after cursor movement, the user may generate user-event signals (e.g. mouse button “clicks” and “drags”) for selecting and manipulating on-screen objects, elements and controls, in a manner as is well known in the art. 
     As shown in FIG. 1B, computer software system  30  is provided for directing the operation of the computer system  10 . Computer software system  30 , is stored in main memory  12  and on mass storage disk memory  17 , and includes a kernal or operating system  31 , and a shell or interface  33 . Application software  32 , in this case the composition program, may be “loaded” (i.e., transferred from disk memory  17  into system memory  12 ) for execution by the computer system  10 . The computer system  10  operates in accordance with instructions from operating system  31  and/or the composition program. The interface  33 , which, in the preferred embodiment, is a graphical user interface (GUI), is used to display results. It is also through interface  33  that the user may supply additional inputs, commands or terminate the computer session. In the preferred embodiment, operating system  31  and interface  33  consists of Windows 95™ and related programs; which are available from Microsoft Corporation of Redmond, Wash. 
     For ease of understanding, a prior art timeline, non-linear digital composition program will firstly be described with reference to FIG.  1 C. As can be seen, the composition program has a user interface  100  including a system menu  104 , a program menu  106  and a timeline area  102  containing multiple timelines. The system menu  104  provides open, close, save and general operators for the whole application. The program menu  106  launches function specific dialog windows using a specific applet interface transferred to each function that when activated, appears and resides on top of the timeline area  102 . 
     Unit time bar  108  provides the user with control over the time increments in the sequentially organized images present in the timeline area  102 . As the user increases the time, the timeline collapses showing fewer images in the timeline area  102 . A time ruler  110  displays the time scale of the current production. Video layers  112  and  114  of timeline area  102  are two examples of the multiple layers where the user places and manipulates existing video segments of the production. Each video segment consists of multiple sequential frames. Each frame of the production appears separately and horizontally across the timeline area  102 . FX layer  116  is where the user deposits an iconic representation of a transition effect such as a dissolve, wipe, etc. This effect is generated using a specific transition effects dialog interface from program menu  106  and is then applied to the FX layer  116 . Sliders  118  operate both vertically and horizontally and are used for building multiple special effects by adding layers to the timeline area  102 . When many effects are added, information which is not in view on the screen must be accessed using sliders  118  to scroll the window to see the hidden information. The horizontal slider allows the user to view the sequential images on the timeline out of view of the screen. 
     Video layers  120  and  122  are two examples of a plurality of layers containing a repository of special effects icons which are applied to video layers  112  and  114 . It is with the video layers  120  and  122  that various special effects are applied, after they have been generated using function specific dialog windows from program menu  106 . 
     Audio layers  124  and  126  are where the audio portion associated with the composition are represented. They are also where additional audio files may be added as separate layers to be applied to the video layers,  112  and  114 . 
     Special effects icons  128  and  130  represent a particular effect that has been introduced to effect the video residing in video layers  112  and  114  and FX layer  116 . Each special effect icon  128  and  130  is associated with a certain range of times on time ruler  110 . 
     Shortcut buttons  132  allow for manipulation of the time base for the composition, and to other functions available on system menu  104  used to edit the production. 
     As can be seen, the prior art non-linear digital composition program employs a series of discrete, special purpose composition editors (not shown) accessible through system menu  104  that are utilized independently of the timeline presentation display to perform basic composition tasks such as applying text and video animation effects to a given composition. Each composition task or step requires a separate timeline sequence or “layer” such as video layers  112 ,  114 ,  120  and  122 , FX layer  116  and audio layers  124  and  126  to be created and displayed for each sequence element needed that is used to produce a final composite video or audio sequence. The separate audio and video layers are not combined at editing time, so that the combined result is not known until the playback stage of the process. As will be appreciated, this prior art method involves selectively operating upon the segments on at least two separate layers or levels, each with its own associated timeline. Furthermore, this method requires grouping of serially connected segments, appearing in layers  112 ,  114 ,  116 ,  120 ,  122 ,  124  and  126  into groups that have the same timeline relationship. These multiple layers are difficult to manage. 
     The non-timeline, non-linear multimedia composition program executed by computer system  10  overcomes the disadvantages associated with the above-described prior art composition program and will now be described with reference to FIGS. 1D to  5 E. When the present composition program is executed, a graphical primary composition user interface  140  is displayed on the display device  16  as illustrated in FIG.  1 D. 
     The user interface  140  includes four major areas, namely: a tool bar  150 ; a source library window  180 ; a console  200  having a viewing window  205 ; and a storyline  170 . This structure simplifies the receiving, processing and presenting of information, including digital video, audio and related composition data and provides straightforward controls for manipulating and outputting a multimedia composition. A pointer  185  for selecting and otherwise invoking screen objects of interest is also provided and is responsive to the mouse  15 . User interface  140  may be closed, minimized or system user help facilities invoked by activating screen close button  166 , minimize button  167 , or help button  168  respectively. The tool bar  150  features multi-stage three dimensional animated icons which can be activated to provide quick access to common system functions such as opening and saving compositions, generating productions and manipulating objects. The source library window  180  displays and organizes one or more specific digital source objects which can be selected, displayed and manipulated on the console  200 . The console  200  is used for previewing and editing specific digital source objects including adjusting images, applying special effects, adding and adjusting fonts, blending objects, manipulating audio and capturing video, images and audio from outside sources. The storyline  170  is used to assemble and manipulate digital source objects, edited objects and transitions into a composition for production. 
     Tool bar  150  also includes a start button  160  which provides access to a pull down menu (not shown) relating to standard software system interface functions, as described hereinbelow. 
     To create a composition, a user uses the tool bar  150  to access system functions to create a new composition or edit an existing one. The source library window  180  is used to access various multimedia source materials and place them as objects on the console  200 . Editing tools on console  200  are used to edit and apply special effects to the objects. The console  200  is also used to create and manipulate transitions between objects. Objects and transitions displayed on the console  200  can be moved to the storyline  170  and manipulated to form a composition. The tool bar  150  is used to save the composition and generate a final output production. 
     In response to operator commands through computer system  10 , source library window  180  allows the user to “scroll” through lists of source materials displayed as pictorial labels, alphanumeric file names or both representing actual source material objects accessible from computer system  10 , mass storage device  17  or input/output subsystem  21 . Using “drag” and “drop” object manipulation techniques, the desired source material can be placed in primary viewing window  205  for dynamic preview purposes and for performing a multitude of composition-related editing tasks, as well as positioned in the storyline  170 . 
     Further specifics of the user interface  140  will now be described. 
     Tool Bar 
     Turning to FIG. 1E, the tool bar  150  is better illustrated. As can be seen, the tool bar  150  includes a column of icons  151  to  159  respectively. The icons can be activated to invoke a number of functions as will now be described. Icon  151  is activated to commence a new production, providing a blank storyline  170  into which objects, transitions and special effects can be applied. Icon  152  is activated to open a previously saved or recorded composition. Icon  153  is activated to save the currently active composition on the storyline  170  to memory of system  10 . Icon  154  is activated to convert the currently active composition on the storyline  170  into a single finished production in a multimedia format such as AVI, MPG, MOV etc. and output the finished production to memory of system  10  or input/output system  21  for later playback. Icon  155  is activated to cut a selected object such as a video clip, transition etc. from the storyline  170  to the clipboard of software system  30 . Icon  156  is activated to copy a selected object such as an audio or video clip, transition etc. from the storyline  170  to the clipboard. Icon  157  is activated to paste a selected object such as an audio or video clip, transition etc. from the clipboard to the currently active storyline  170 . Activation of icon  158  deletes the currently selected object. Icon  159  activates the undo function, undoing the last user interface operation. 
     Turning to FIG. 1F, the three dimensional aspect of the icons  151  to  159  of toolbar  150  is illustrated. The icons  151  to  159  activate both software system  30  and user controllable properties. These include sound, motion, process monitoring, context-sensitive display, background tasks, etc. Icons  151  to  159  can be programmed in such a way as to respond to the changing information presentation needs of the user. 
     Each of the icons  151  to  159  of tool bar  150  has three states. The first state is that of a standard two dimensional icon. Upon moving the pointer  185  via pointing device  15  in close proximity, each of icons  151  to  159  gives the illusion of moving outward forming a three dimensional representation. Upon activation, each of icons  151  to  159  rotates and returns to its original position. The illusion of outward motion and rotation is performed by the temporal display of a sequence of images  153   a  in relief whereby the icon is shown with a shadow behind in various states of rotation. A sequence of images  153   a  illustrating the above illusion of outward motion and rotation is shown in FIG. 1F, which shows a typical sequence for icon  153 . This three dimensional relief and rotation provides two benefits. First, it indicates to the user that the selection of a specific icon has been recognized by the system. Second, the rotation provides feedback to the user that not only has the icon been selected, but that the operation associated with that icon has been recognized and activated by the system. 
     Each of icons  151  to  159  provides a shortcut to invoke functions which are also accessible through the start button  160 . Upon activation of start button  160 , a start menu is displayed. The start menu has menu options for production, file, library, tools, help, options and print to video. Submenus relating to production are accessible by activation of the production menu option from the start menu. From the production submenu, there is accessible an additional sub-menu containing file, edit and insert clip commands relating to production. From the file menu option, standard file commands are available. Also, when the file menu option is selected, a produce menu option appears which, when activated, generates a production of the currently active composition on storyline  170 . 
     When the library menu option is selected, commands relating to the source library window  180  are accessed. Such commands relate to the library area  180  and include file, edit, view, add files and insert into production. From the file sub-menu of the library menu option, the operations of creating a new library, opening an existing library and saving the current active library displayed in source library window  180  are performed. From the edit sub-menu of the library menu option, the features of the currently active library item in source library window  180  are accessed. The edit sub-menu from the library item of the start menu includes a properties option that provides for displaying features of the currently active object, as described hereinbelow with reference to FIG.  3 H. 
     Source Library Window 
     Turning to FIG. 2A, source materials are shown as objects within source library window  180  and can be organized into one or more object groupings or libraries. Source materials may be organized according to a multitude of user defined properties such as subject, object type, composition sequence, file type, file name, size, date, etc. The source library window  180  is context sensitive in that it displays source materials which are of the same type as the currently active object on the console  200 . For example, if a video object is active in the console, video source material objects are presented in the source library window  180 . If a transition appears on the console, various transition effects which can be applied appear in the source library window  180 . If an audio object is presented on the console, audio effects which can be applied to the object appear in source library window  180 . 
     Source objects may be organized using hierarchical and relational database file storage methods for rapid retrieval and content management purposes. By positioning the pointer  185  in the described position and right “clicking” with the mouse  15 , users can access the software system functions to perform a multitude of tasks. Such tasks include opening, creating and saving new libraries, viewing source files either as dynamic images or alphanumeric file names, adding files to any given library, causing selected files to be placed in the viewing window  205  of console  200  for previewing purposes, causing selected source materials to be automatically positioned on the storyline  170 , enabling users to perform cut, copy, paste and delete operations as applied to selected source materials, renaming source material files and displaying given scene properties according to associated file and media properties. Many corresponding operations such as open file, open library, cut, copy and paste are also available using start button  160  of tool bar  150 . 
     Storyline 
     Turning to FIG. 2B, the storyline  170  is better illustrated and as can be seen, a “film strip”  171  metaphor is utilized. Client windows are located on the storyline  170  and represent viewing frame objects  172  constituting a source material and segment sequence. The client windows are separated by transition frames  173  on the film strip  171 . The transition frames  173  are used to denote the presence of transition sequences between two sequential viewing frame objects  172  as well as to provide access to an associated transition composition editor tool by means of a double mouse click. Source material segments can be dynamically rearranged and manipulated by means of “drag” and “drop” techniques on the film strip  171  allowing a user to quickly arrange composition segments into a desired sequence. The film strip  171  sequence display can be manually advanced in any direction by positioning the pointer  185  and selecting and dragging the “film strip”  171  in the desired horizontal direction. A user can also advance to the beginning or end of the composition sequence by means of “Home” and “End” shortcut keyboard commands. Individual viewing frame objects  172  or transition frames  173  can be highlighted for dynamic preview in the primary viewing window  205  by performing a “shift” keyboard command in conjunction with appropriate cursor placement. Highlighting any given viewing frame object  172  or transition frame  173  and performing a left and then a right mouse click operation will cause an associated properties client window to appear. The client window is used to perform related tasks such as dynamic previewing, renaming source filenames, editing transitions and composition production. 
     Console 
     Turning to FIG. 2C, the console  200  is better illustrated. The console  200 , in addition to the viewing window  205 , includes a timing control area  252 , an editing tool area  210  having a plurality of editing tool icons and a preview control area  220 . Primary composition editing tools are accessed by means of a single mouse click on the appropriate editing tool icons. The composition editing tools when “activated” by the user appear as seamless extensions of the console  200 . This console adjustment is commonly known as “morphing”. In this manner, the console  200  includes the controls for all the editing needs in one place, in a consistent user interface, without the need for cascading menus. 
     Turning to FIG. 2D, preview control area  220  and timing control area  252  are better illustrated. Preview control area  220  includes controls that are self-illuminating “buttons” designed to provide the user with visual feedback as to the current active or inactive status of each control or series of controls. These controls include a record button  224 , a pause button  222 , a play button  221 , a previous frame button  226 , a next frame button  227 , a single frame advance button  228 , a first frame button  225 , and a loop button  223 . Buttons  221  to  228  are designed to mimic standard VCR controls to operate on the object active in viewing window  205 . These controls are activated by a single mouse click and an allow an object to be dynamically displayed and played on console  200 . 
     Time control area  252  contains a time code display window  230 , a progress indicator ball and slider window  231 , a segment start or “in” point indicator and control window  232 , and a segment end or “out” point window indicator and control window  233 . In time control area  252 , video and audio object sequences are assigned internal time codes using the clock within computer system  10  for composition editing purposes unless the source material object already incorporates previously assigned industry Society of Motion Picture and Television Engineers (SMPTE) time code location signals. If SMPTE time code signals have been assigned, they are automatically displayed in conjunction with the source object. Slider window  231  provides the user with a visual segment display progress indicator and control for manually advancing or forwarding of segments displayed within the viewing window  205  by means of cursor and mouse control. Control window  232  incorporates a numeric display and button for indicating a selected start point of the object. The setting of a start of a given object is done in a non-destructive manner in conjunction with video editor  211  (FIG.  2 E). Control window  233  incorporates a numeric display and button for indicating a stop point and includes an editing control for determining the end point of an object in a non-destructive manner in conjunction with video editor  211 . 
     Turning to FIG. 2E, the editing tool icons of editing tool area  210  are better illustrated. As can be seen, the editing tool icons represent a series of integrated composition editing tools, including a video editor  211 , a special effects editor  212 , a text editor  213 , a transitions editor  214 , a video animation editor  215 , an audio editor  216 , and a video capture editor  217 . The editing tool icons include an accompanying “active” status indicator  218  which appears as a light emitting diode to provide the user with visual confirmation that the editing tools have been used to alter a source material object displayed in the viewing window  205 . Edit information is stored with each object and is used when the object is dynamically displayed or played on console  200  and when the composition is finally produced. 
     Turning to FIG. 3A, the features of video editor  211  are shown. The video editor includes controls for adjusting aspects of the source material object displayed in the viewing window  205  by manipulating the brightness of brightness slider  310 , red control slider  311 , green control slider  312  and blue control slider  313 . The sliders  310 ,  311 ,  312  and  313  include a sliding ball which the user manipulates by means of pointer and mouse controls to adjust the corresponding color intensities of the source object. Additional tools are available by activating trim button  315  for “trimming” a given source object by denoting its start position with the button in control window  232  and stop position with the button in control window  233 . The source segment may be split by split button  314  in the same manner as “trimming”. This preserves the original object being viewed in viewing window  205  while simultaneously causing an identical copy of the object to be placed on the next sequentially available position of storyline  170 . Duration window  316  is also provided for setting and denoting the duration of the object segment currently active within the viewing window  205 . By activating apply button  317 , the desired editing operation can be applied to the object. The original object settings can be reset or removed by activating remove/reset button  318 . The editing tool can be closed by activating close button  319 . Buttons  317 ,  318  and  319  apply to all of the editing tools in editing tool area  210  and operate in a like manner. 
     Turning to FIG. 3B, the features of special effects editor  212  are shown. The special effects editor  212  is integrated within the console  200  and allows special effects “filters” or processes to be applied to a given source object selected from a library in source library window  180  of FIG.  2 A. The special effects filters are represented by pictorial images  220  for use in conjunction with any given object currently being displayed within the viewing window  205 . The duration and intensity of the selected special effect at the start of display of the object and at the end of display is determined by means of start slider  321  and end slider  322 . Sliders  321  and  322  utilize a sliding ball and duration scale and the effect created by the special effects editor  212  is dynamically previewed or demonstrated utilizing the viewing window  205 . This provides the user with immediate feedback and visual confirmation of the special effect. Once determined, the special effect sequence can be applied by activating apply button  317 . The special effect can be subsequently removed by activating remove button  318   a . The editing tool can be closed by activating close button  319 . 
     Turning to FIG. 3C the features of text editor  213  are shown. The text editor  213  is integrated within the console  200  and allows both static and animated text within any given source object or composition. Text window  330  permits the user to enter text into a text box  330 , to be incorporated into source video objects displayed within the viewing window  205 . As text is entered into text box  300 , it is dynamically displayed in viewing window  205  to provide immediate user feedback. Control button  330   a  enables the user to select from a system list of font types and sizes. Font buttons  330   b  and  330   c  permit the user to designate whether font effects are to be applied to individual lines of text or groups of text respectively. 
     Text overlays are dynamically positioned for application to video as illustrated in position control pad  331 . This enables the user to dynamically position text and determine both duration properties and motion control paths of the text across viewing window  205  as part of an animation sequence. Start button  332  in conjunction with the position of a movable pointer on control pad  331  determines the “start” position and properties such as transparency, color, etc., of the initial application of text to the active source object in viewing window  205 . Hold button  333  determines the period between the start and finish of the display of the object through its sequence. The finish button  334  determines the end of the display of the active object through its sequence. Hold button  333  and finish button  334  operate in a similar manner to start button  332  and are used to control the “hold” and “finish” properties and positions of the text as the object is displayed in viewing window  205 . Transparency slider  335  enables the user to vary text transparency levels, while text color box  337  provides access to the system color palette for application to text and font data previously determined by the user. Duration box  336  allows the user to control the duration of each text animation “event” as applies to position control pad  331 , start button  332 , hold button  333  and finish button  334  respectively. 
     Turning to FIG. 3D, the features of transitions editor  214  are shown. The transitions editor  214  is integrated within the console  200 . The transitions editor enables the user to create a transition “effect” between two source object segments for composition purposes. Transition “effects” are displayed as pictorial images and are selected by the user for application from the corresponding “transitions” library accessed through and displayed in source library window  180 . When selected, the image indicator of the chosen transition appears in client window  342  as a looping or automatically repeating animated sequence above two film strips. The initial source object is placed by the user in viewing window  205  with a corresponding pictorial image indicator or representative “frame” subsequently appearing in view window  340 . The second source object segment is then placed in viewing window  205  with a subsequent image indicator or frame appearing in view window  343 . The duration of the transition effect can be determined and adjusted either by manipulation of a representative “film strip” in client window  342  denoting the degree of overlap occurring between the two object segments, or by entering a numeric value in client window  341 . Once completed, the effect can be “applied” to the sequence and subsequently viewed by the user in viewing window  205  by activating the apply button  317 . The sequence can then be placed on the storyline  170  for composition. 
     Turning to FIG. 3E, the features of video animation editor  215  are shown. The video animation editor  215  is integrated within the console  200 . The purpose of the video animation editor is to enable one or more “foreground” source animation objects to be applied to a background source animation object. To determine the background of the video animation sequence, the user selects a given source segment from source library window  180  and causes the object to be placed in viewing window  205 . The corresponding representation appears in client background window  350 . The source object to be overlaid or animated is then selected in the same manner and correspondingly appears in viewing window  205 , its relative size being determined using a “slider” ball in slider window  354 . A representation of this source segment appears in a client foreground window  351 . The user can remove or blend colors in the background and foreground to achieve the desired animation effect using image blend button  352  and remove color button  353  respectively. This “chroma keying” technique is well known to those skilled in the art. The animation path, duration and properties of the source segments or sequences are determined by means of position control pad  331 , start button  332 , hold button  333 , finish button  334 , duration box  336  and object transparency slider  335  which operate in a similar manner as described previously with respect to text editor  213 . Once completed, the effect can be “applied” to the sequence by activating apply button  317  and subsequently viewed by the user in viewing window  205 . The sequence can then be placed on the storyline  170  for composition purposes. 
     Turning to FIG. 3F, the features of audio editor  216  are shown. The audio editor  216  is integrated with the console  200 . The audio editor  216  enables users to add one or more audio “tracks” to a given source object or composition sequence. Activation of audio editor  216  causes a context-sensitive source library listing audio objects to be displayed within source library window  180 . The desired audio source object is selected by the user and placed in a list window  360  for composition display purposes. Any audio source object segments or files already associated with the video source object segment being displayed in viewing window  205  are listed within list window  360 . One or more audio source object segments can be dynamically added to the video object currently displayed within viewing window  205 . Audio objects can be manipulated by selectively activating muting box  362 , fade-in box  363 , fade-out box  364  and repeat box  365 . The amplitude of each audio object and/or “track” of the object can be manipulated by the user by means of a volume control slider  366 . Corresponding “level” indicators for both left and right stereo volume levels are displayed on left level indicator  3671  and right level indicator  367   r  to provide the user with a visual representation of audio sound levels by “channel”. 
     Once completed, the desired audio source object segment can be “applied” to the video sequence by activating apply button  317  and viewed and listened to by the user through console  200 . The object in viewing window  205  can then be placed on the storyline  170  for composition purposes. Checkbox  360   a  allows the user to choose which track of a multi-track audio track displayed in list window  360  is to be manipulated with respect to the object in viewing window  205 . An audio amplitude meter displays the amplitude of the audio when played. 
     Turning to FIG. 3G, the features of capture editor  217  are shown. The capture editor  217  is integrated with the console  200 . The capture editor enables users to readily acquire or “capture” video and audio source segments from external sources by means of video and audio recording devices connected to input/output system  21 . The capture editor  217  enables the user to switch or toggle between video and audio capture capabilities by means of audio button  370 . The user can dynamically capture an image from any video source segment displayed in viewing window  205  by activating image button  371 . Sequences of varying duration can be captured by activating sequence button  372 . The system can optionally control external devices such as camcorders, VCRs and Media Control Interface (MCI) devices connected to input/output system  21  by activating MCI capture button  373   a  in conjunction with selecting the appropriate device connected to the computer system  10  from a list of device drivers displayed in driver list box  373   b . Once captured, audio and video objects can be added to content source libraries as objects through source library window  180  and actual composition “productions” on storyline  170  by means of activating checkboxes  376  and  377  respectively. Video source button  374 , when activated brings up a display box to choose the source device, VCR, camcorder, etc., connected to video input/output system  21  to perform the capture. Compression button  375  allows for the selection and display of a list of video compression techniques to be applied to the captured video. 
     Turning to FIG. 3H, the features of an object property list  380  are better illustrated. The object property list  380  is accessed by first selecting an object from the source library window  180  or film strip  171 , then activating the properties option on the user interface  140  by means of a right click of pointing device  15  or from the edit submenu accessible from start button  160 . The object properties list  380 , displays file properties  382 , clip properties  384 , and media properties  386  relating to the currently selected object or library item. 
     Composition Production 
     Turning to FIG. 4A, a dialog box for manipulation of the composition production output is shown. After completing the composition editing process described above, the user selects the production menu item from the start button  160  on tool bar  150 . The user is prompted for an identifier for the output and the desired video format. Once that is entered, the dialog box of FIG. 4A is presented enabling the setting of composition production parameters. The user can select the frame size from frame size list box  410  to adjust pixel width and height for the production. Color control for the number of colors is provided by selecting the desired color button in color selection area  411 . Clip scaling options are controlled by selecting the desired clip scaling button in clip scaling selection area  412 . The video compression technique such as uncompressed AVI, MPEG, etc. is chosen by selecting the desired method from list box  413 . Data rate box  417  allows for the data transfer rate, in bps, to be set for the production. The rate of display of frames can be controlled and optimized by choosing the desired rate from frame rate box  414 . Quick compress box  415  allows for the selection of quick compression to be applied to the production. The key frame box  416  allows for the choice of the frequency for reference or “key” frames to be generated in the production. Production quality can be adjusted by means of a variable slider  418 . Audio format menu list box  419  allows for the selection of the selected audio output format for the production. Access to advanced encoder options supplied by a third party such as Microsoft is accomplished by clicking on an Advanced Options button  420 . Pressing a “next” button  421  takes the user to the next step in the composition production process, as illustrated in FIG.  4 B. 
     Turning to FIG. 4B, the screen for controlling composition production is shown. The current output file name or device, which can be modified by the user, appears in file name display window  401 . The numeric file length value is displayed in box  402 . The source segment or “clip” is displayed in clip start box  403 . The total number of frames in the given composition sequence is shown in frame box  404 . The current frame is displayed in frame box  405 . The estimated file size is shown in file size box  406 . The user can proceed to the next step in the composition production process by placing the pointer on the “Produce” button  408  and clicking the mouse  15 . The final composition is then generated and stored in mass storage device  17  or input/output subsystem  21 . 
     Turning to FIG. 5A, the screen for displaying and controlling various user defined options is shown. These are accessed by activating the start button  160  on tool bar  150 . The user defined options which can be manipulated fall into numerous categories as discussed below. General options can be accessed by activating general options tab  501 , source material preview options can be accessed by activating preview options tab  502 . Composition production options can be accessed by activating produce tab  503 . Capture options can be accessed by activating capture options tab  504 . Finally, capture driver options can be accessed by activating capture driver tab  505 . System preference management options are accessible from tab  501  and include display tool tips, show splash screen on startup, clear library contents on new productions, and save library with the production option settings which are invoked by means of activating the appropriate checkbox in preferred checkbox area  506 . 
     Turning to FIG. 5B, the preview options accessible upon activation of preview options tab  502  are shown. Preview options illustrated include default source video segment presentation size in pixels selected from size buttons box  510 . Clip scaling options are set by selecting the appropriate button in clip scaling area  511 . The video editor preview display window  512  employs a slider and representative speed scale to enable the user to adjust the frame rate to optimize viewing speed. The storyline preview options  513  can be adjusted by selecting the desired checkbox options to show effects, show image blending and show text/video animations. Video display frame rates can be adjusted with a slider and representative speed scale in slider window  514 . 
     Turning to FIG. 5C, the default produce options accessible upon activation of produce options tab  503  are shown. The user can select the frame size from frame size list box  540  to adjust pixel width and height for the production. Color control for the number of colors is provided by selecting the desired color button in color selection area  542 . Clip scaling options are controlled by selecting the desired clip scaling button in clip scaling selection area  544 . The video compression technique such as uncompressed AVI, MPEG, etc. is chosen by selecting the desired method from list box  546 . Data rate box  548  allows for the data transfer rate, in bps, to be set for the production. The rate of display of frames can be controlled and optimized by choosing the desired rate from frame rate box  550 . Quick compress box  552  allows for the selection of quick compression to be applied to the production. The key frame box  554  allows for the choice of the frequency for reference or “key” frames to be generated in the production. Production quality can be adjusted by means of a variable slider  556 . Audio format menu list box  558  allows for the selection of the selected audio output format for the production. Access to advanced encoder options supplied by a third party such as Microsoft is accomplished by clicking on the Advanced Options button  560 . 
     Turning to FIG. 5D, the capture options accessible upon activation of capture options tab  504  are shown. The default capture directory can be set in directory window box  520 . The preview video frame rates can be adjusted by selecting the appropriate box in checkbox area  521 . The general options area  522  allows the user to “open capture at startup” and “stop capture preview when window not active” by allowing the user to check the associated checkbox. 
     Turning to FIG. 5E, the capture driver system options accessible upon activation of capture driver tab  505  are shown. The capture driver system options illustrated in FIG. 5F include check boxes for assigning video capture preferences in video control area  530 , including source material frame rate, capture limits in terms of length of time, capture to memory, capture with audio, prompt before starting, and preview options. The capture file can be set in browse window  531  enabling the user to pre-allocate storage location and file size. Display list window  532  enables the user to select the audio format of captured audio source materials, while video source button  533  enables the user to select the desired video source from input/output subsystem  21  or mass storage  17 . Video compression button  534  allows the user to select a variety of industry standard compression options by means of a “drop down” menu list. 
     The digital video, audio and multimedia composition program described herein provides the user with remarkable flexibility and ease of use in the manipulation and composition of digital source materials. The assembled material can be gathered from numerous sources, including on-line storage devices, analog to digital signal capture devices, scanners, compact discs and digital cameras, then rapidly edited and assembled in any desired order to create complete compositions. The user can reorder scenes, trim, shorten or lengthen sequences, add new source materials, transitions, animations, titles and text, edit audio, add voice overs, music and other special effects in a completely temporal, non-timeline-based composition environment. This process can be repeated as many times as necessary until the composition is deemed satisfactory for final production in one or multiple formats for any number of commercial or personal uses. 
     In contrast to conventional video and audio composition applications, even those operating in a windowing environment, the primary composition user interface  140  includes user-familiar objects, i.e. paradigms of real world objects that a typical user should already know how to use. The complexities of the operations are hidden under ordinary, everyday object metaphors. All of the input source materials, edited materials, transitions and output are treated as objects. The objects can be “played” in part or in whole or caused to loop or repeat indefinitely at any given time during the composition process. In other words, the objects represent materials that vary over time. The primary composition user interface  140  provides a highly intuitive presentation of advanced features (e.g. special effects, transitions, etc.) that are easily selected and invoked. 
     Although a preferred embodiment of the present invention has been described, those of skill in the art will appreciate that the present invention is not limited to any particular application or any particular environment. The system and method of the present invention may be applied advantageously to a variety of systems and applications software, including but not limited to audio composition, three dimensional animation, multimedia authoring and the like. Moreover, the present invention may be embodied on a variety of different hardware and software platforms, including UNIX, Macintosh™ and the like. 
     Although a preferred embodiment of the present invention has been described, those of skill in the art will appreciate that variations and modifications may be made without departing from the spirit and scope thereof as defined by the appended claims.