Using Ada in Interactive Digital Television Systems
Abstract Since 1996, the Digital Television (DTV) market has been exponentially growing. Based on widely accepted MPEG and DVB standards, the digital television offers a higher image quality as well as an unlimited number of interactive services.
Canal+ Technologies provides a complete end-to-end solution for Digital Television operators, from the central broadcast centers to the set-top boxes at home. The DTV broadcast center systems have availability, reliability and load constraints which require a robust implementation. For this reason, the server-side components of the Canal+ Technologies software have been developed in Ada.
This paper explains the architecture of a Digital Television system and how Ada is used inside this system. It also describes how this system is currently reengineered from a proprietary Ada 83 / OpenVMS implementation using the DEC Ada compiler to an Ada 95 multi-platform implementation using the GNAT compiler.
KeywordsDigital Television Transport Stream Market Acceptance Technology Product Line Dynamic Memory Allocation
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