Data processing: database and file management or data structures – Database design – Data structure types
Patent
1998-01-26
2000-07-25
Amsbury, Wayne
Data processing: database and file management or data structures
Database design
Data structure types
707 1, 709249, G06F 1730
Patent
active
06094661&
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to the transmission of multimedia objects in a digital telecommunication system in general, and to the transmission of a start-up procedure (script) for multimedia software via a digital telecommunication system.
Multimedia means the presentation of synchronized, audiovisual items to the user. A standard has been created for handling multimedia software on an abstract level. The standard is designated as ISO/IEC 13522, it has 5 parts for the present, and in the following it will be referred to as the MHEG standard (Multimedia Hypermedia Information Coding Experts Group). In this standard, the multimedia software is defined as an entity formed by so called objects. These objects belong to object classes, which have been defined according to a certain syntax, and the members of the object classes are objects to which the class-specific definitions apply. Examples of object classes are links, action objects, composition objects, content objects and container objects. Some objects can be temporarily continuous, in which case they are called streams. In addition, objects can be multiplexed, whereby a multiplexed object consists of two or more streams, which are called component streams. These can again be multiplexed, or contain more streams.
The objects according to the MHEG standard are numbered, whereby they can be referred to by the numbers. The components of multiplexed objects are referred to be hierarchical series of numbers, for example, as in the standard MHEFG1, or by unique numbers without a hierarchy, as in the standard MHEG5. Let us assume, for example, that a multiplexed object A of the content class is denoted by number 1, as in FIG. 1, and it comprises a component stream B, the object number of which is 5 and which further comprises component streams, one of which, C, is denoted by 2. Thus the series of numbers, 1.5.2., according to the standard MHEG1, refers to the component stream C on the lowest level of the hierarchy, and at the same time indicates that the hierarchy has three levels. According to the standard MHEG5, each of the objects has a unique number without any hierarchical indications.
In order to produce a multimedia presentation by using objects according to the standard MHEG, a special tool is needed to handle or interpret the objects, organize the relations between them correctly by using the numerical references and control their presentation to the user. This tool is known as the "MHEG engine". It is generally implemented programmably, and its operation is defined in the standard MHEG on a general level.
Digital, broadcast-type telecommunication systems will become an important method for implementing massive data transfer, such as radio and television, in the future. Examples of digital broadcasting systems are the DAB and DVB systems (Digital Audio Broadcasting: Digital Video Broadcasting), but with certain assumptions, the invention can also be generalized to other types of systems. Because the present invention relates to the transmission of a reference system according to the MHEH standard and a start-up procedure for a multimedia presentation via a digital broadcasting system, in order to shed light on the background of the invention, the features of the DAB system that support that implementation of the invention will be described briefly in the following. The essential parts of the DAB system are defined in the standard ETS 300 401.
In according with FIG. 2, one signal stream transmitted by a transmitter according to the standard forms a DAB ensemble, which can contain a number of services E, F, G. In view of the user, each service corresponds to one radio channel of the present systems, and it consists of one or more service components H, I, J, K, L, M. A single service component can contain, for example, the audio part offered by the service, such as music, or a data part related to it, such as the lyrics of the song being played, or other information related to the service. One service component can belong to more th
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Amsbury Wayne
Oy Nokia AB
Pardo Thuy
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