Abstract
This contribution describes a Videotex terminal with photographic capabilities based on a personal computer (PC). This system takes advantage of a recently available support - the Integrated Services Digital Network (ISDN) - which represents a significant improvement in the performance of communication systems, and is intended to offer a new and practical service while maintaining compatibility with the Alphamosaic Videotex.

Abstract

Abstract
Like many other subjects, SDL is embroiled in the fusion of the Telecom and Information systems worlds. This represents a shift from the predominant use of SDL in relatively closed Telecom areas to the more and more widely used open distributed processing environments. ACTS project AC227, SCREEN, is working to improve the creation of distributed telematic services. This paper presents some of the issues and challenges that these new environments present to SDL language, and the rationale for combing SDL with OMT and the targeting to CORBA compliant environments.

Abstract

Abstract
We present an integrated approach (practices) to object-oriented, distributed, application development that covers all phases of software development: requirements capture, analysis, design (structural and behavioural), simulation and targeting to CORBA-based distributed processing environments. We focus on a code generation strategy that addresses and supports all phases of the practices. We highlight code generation objectives including support for multiple paths through the practices, reuse of existing tool-sets and support for traceability. We describe one path in more detail and present an example of design OMT to SDL translation based on labelling in OMT. We describe two development environments used in the project and analyse them with respect to their support for our code generation objectives. Our tool adaptation work is addressing identified weaknesses. This includes an SDL to Java/CORBA code generator, the generation of CORBA-to-SDL-mapping C++ wrappers for C code generated by existing tools and the use of CORBA to integrate development tools and support traceability.

Abstract
Applications and products currently available for the broadcasting market are vertically integrated or proprietary They are based on components requiring specific and costly development to interoperate and typically rely on a single manufacturer or system integrator Hence, they are not fully compliant with broadcasters' requirements. Architectural Solutions for Services Enhancing digital Television (ASSET) is a European-funded project. Its main goal is to overcome the limitations of custom-specific implementations in a digital system for TV content creation. These limitations are generally due to the misfit of interfaces between software layers, proprietary application program interfaces (APIs) of equipment from different vendors, and the lack of a generalized middleware for multimedia content management with openly defined interfaces. Besides presenting the ASSET-proposed architecture and concepts, this paper describes the prototype under development to test and demonstrate the project proposals.