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Leistungen
VIZARD introduces a new intuitive concept to deal with video content. The software supports users in order to create a sketch or a story they want to tell. Rather than be constrained by having to follow simple timeline representations, editors are able to manipulate the inner structure of a digital video. This is realized by visualizing a video like a book in sentences, paragraphs and chapters. VIZARD consists of three main components: the VExplorer, the VPublisher, and the VAnnotator. Furthermore a special library supports basic editing operations in the compressed domain for the formats MPEG-2.
VExplorer
The VExplorer provides the user with a comprehensive "video collection search, organization and management" tool for organizing local content and in order to pre structure material in a repository. The most important feature of the VExplorer is to provide the user with logical views on the local archive on any kind of data (e.g. video, audio, text, images, programs, etc.). These views can be customized as hierarchically structure-able collections representing temporal orders. Next to this the VExplorer enables the user to draft a story or a sketch by selecting and structuring material. During this phase the user can take advantage of the powerful search mechanisms provided by the VExplorer. Searching for content can be either done on similarity (query by image) or by searching annotations created with the VAnnotator. The entire repository containing the stories can be persistently stored in XML format. Single items or entire sub-trees can be directly imported into the VPublisher in order to be further refined and manipulated.
VPublisher
The VPublisher is a new-generation storyboard, video editing and video publishing tool. With the VPublisher, the user has the possibility to manipulate the inner structure of a video document we call Video Book, with the result that the publishing of personalized video content is as easy as writing a text document. The basic idea of the VPublisher is to move away from a simple time line representation as it is currently used in commercially available video editing systems. We provide an overall visualization of the object structure by generic layout elements.
VAnnotator
The VAnnotator provides a flexible and intuitive way for annotating video material. This tool uses the concept of video lenses for providing different views on the materials being annotated. There are lenses for viewing and adding textual annotations and lenses that allow viewing the result of image processing algorithms such as cut detection. The tool follows a timeline paradigm, where each track can have several annotations. All the annotation data is based on the MPEG-7 standard and the output format is also compatible with MPEG-7.
The Compressed Editing Toolkit is designed as Software Development Kit to provide the VIZARD application components VExplorer, VAnnotator, and VPublisher with basic functions to process MPEG-2 Streams in the Compressed Domain.
The main advantages of the CET concern the improvement of MPEG-2 compressed source material in terms of performance and quality. The MPEG-2 smart encoding features are really important and helpful for professional end-users in that purpose, and will be influence other user groups increasingly, taken into account that MPEG-2 is probably becoming a new consumer format.
The potentials for processing MPEG-2 in the compressed domain avoids time-consuming and processor intensive recoding during rendering in a way that most of the rendering can be reduced to copy operations. The implemented smart rendering features prevent encoding and decoding in a way without loosing quality of video source material.
The integrated scene cut detection algorithms were developed and implemented with time-spending effects, and as quality preservation effort. The CET provides as Toolkit general MPEG-2 support functions key frame grabbing incl. optimised scaling as well as seeking, playback.
The CET is designed as SDK in a general manner that is compliant to DirectShow's COM based infrastructure and programming model and is therefore usable as integrated as well as as standalone Software. There exist two optional usable Versions of the CET, one as SDK-Installer including several utilities and samples, the CET Demo-Player, headers and documentations. The other one is a runtime-only package for integration into the VIZARD-Installer.
Vpublisher
The VPublisher is a new-generation storyboard, video editing and video publishing tool. With the VPublisher, the user has the possibility to manipulate the inner structure of a video document we call Video Book, with the result that the publishing of personalized video content is as easy as writing a text document. The basic idea of the VPublisher is to move away from a simple time line representation as it is currently used in commercially available video editing systems. We provide an overall visualization of the object structure by generic layout elements.
The VAnnotator provides a flexible and intuitive way to annotate video material. This tool is based on the concept of video lenses, which are customisable interfaces that provide different views on the content being described. A set of pre-defined video lenses is provided, to which users can add their own designs. The user interface follows a timeline paradigm, with annotated segments assigned to tracks at different levels. Support to the segmentation of the video material is provided in a number of ways, including automated cut-detection processing. The annotation data is based on the MPEG-7 standard and the output format is also compatible with MPEG-7.
In summary the result of the Vizard project has shown us how important it is to keep a very close contact to the various groups when developing a software. The modular approach is helpful to share the work of designing and programming an application but the essential part is bringing these elements together and make them fit naturally. Ideally, there should be one key person assigned at the beginning of this project to ensure that this task is taken care of.
This result is mostly methodological.
The Centre Audiovisuel de Paris/Forum des images gained knowledge of their own practice and workflow by specifying and formalizing for VIZARD the target user groups and use cases. This formalization process helped developing internal experience in functional specification as well as better awareness concerning innovative multimedia tools.
Moreover, VIZARD helped defining new functionalities and services for our costumers, especially through the VExplorer and VAnnotator modules, which proved full of very useful interaction concepts for improving the archivists' workflow or developing new educative workshops on audio-visual documents.
Through testing and validating the results of the developments in VIZARD we gained also experience in software validation procedures.
The VIZARD experience will definitely be integrated in the new digital consultation room being currently developed at Forum des Images, may it be as a conceptual and formalization paradigm or as a software module.
There are two main outcomes: refinement of current workflows and experiences in development of specifications for software implementations (including testing evaluations).
Through a straight process of gathering and analysing in the broadcasting workflow new future job descriptions have been gained. This is based on the development of new tools like the VAnnotator, the VExplorer and VPublisher. They can support the new workflows in a simple way (from searching archives, organizing material to creative editing). Beside these perceptions, the ORF's testing and evaluation competence was improved. From the archives point of view, the new visualisation concepts of AV-material and the experiences with new metadata schemas (based on MPEG-7) are the most important experiences.
The VExplorer provides the user with a comprehensive "video collection search, organization and management" tool for organizing local multimedia content. The VExplorer allows to pre-structure material in a repository. The most important feature of the VExplorer is to provide the user with logical views on the local archive on any kind of data (e.g. video, audio, text, images, programs, etc.). These views can be customized as hierarchically structure-able collections representing temporal orders. Next to this the VExplorer enables the user to draft a story or a sketch by selecting and structuring material. During this phase the user can take advantage of the powerful search mechanisms provided by the VExplorer. Searching for content can be either done on similarity (query by image) or by searching annotations created with the VAnnotator. The entire repository containing the stories can be persistently stored in XML format. Single items or entire sub-trees can be directly imported into the VPublisher in order to be further refined and manipulated.
System requirements include both technical requirements and functional requirements. These include: computing platforms to support information formats and standards to support interfaces to complementary systems and compatibility requirements with legacy systems.
Being in charge of these requirements in VIZARD we had the responsibility of creating the functionalities for a new innovative tool that would fill the gap between advanced video editing tools and the video capture devices.
This new tool will allow people who want to create a new film out of audio-visual source material to structure and prepare their content before the editing itself. This element makes it easy for people who are not specialised in editing, home users and educational institutes to create new stories using several types of audio-visual media.
Contributing to the development of a new intelligent tool for video publishing that would fulfil the void between digitising and editing of video footage, going through logging, annotation and definition of styles of video, we made it possible for the new video editors not to limit themselves to simple time-line representations, but will have the possibility to manipulate the inner structure of a video document (video book paradigm) and work with hyper-video representations to build distributed and personalized collections within the same file. This tool will also use the new MPEG-7 Technology which deals not only with the segments of video and audio, but also with metadata and hyper-video by providing a flexible and intuitive way for annotating video material, through one of its applications the Vannotator. This tool, which also uses the concept of video lenses for providing different views on the materials being annotated, is an innovation on these types of products existing in the market.
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