Technology

itv_en002001.gif
2. Cont. on demand
itv_en002001.gif
3. Deferred TV
The iTV application is executed on the computer unit of the receiver device. The software level (platform) that enables this can comprise varying configurations.

 

Process/operating system

The programmed application can be translated (compiled) in the machine code during the production phase. This form of application is optimal in terms of performance and scope of functionality. However, it can only run on the receiver device for which it has been compiled.

 

Virtual machine

A virtual machine is a simulated operating system. It must be implemented on all receiver devices. However, from the perspective of the application, the various receiver devices then present a homogenous platform.

After programming, the iTV application is translated into a generally applicable intermediate code, which is then transferred and executed on the virtual machine.

The virtual machine offers the complete scope of functionality.

The iTV middleware OpenTV offers a proprietary virtual machine for its applications, which is written using the programming language C for example. With the Java system, the virtual machine is an integral component part.

 

Browser/engine

These software components execute programmed applications in scripting languages and markup languages.

The functional scope is limited.  

 

 

Harald Molina-Tillmann

Introduction to interactive television

itv_en002001.gif
4. Return channel
itv_en002001.gif
5. Encryption

7. Runtime environment

6. Further technology
7. Runtime environm.
itv_en002001.gif
1. TV transmission
itv_en002001.gif
Quintessence
Home Realisierung Kontakt Grundlagen Dramaturgie Design
8. Programming
9. API