Whats a real-time system?
A real-time computer system is a system in which the timing of events plays a critical role in the operation. For example, in the robotics area, where OS-9 is also extensively used, it is of great importance that different tasks occure at the exact specified moment. In CD-i, real-time behaviour is also important, since audio and video data need to be decoded by the appropriate processors and then send to the appropriate outputs. At the same time, the system should take care of user input. 3.5 What’s sector interleaving? One of the clever design creteria of CD-i was that the system should be able to retreive audio and video information in realtime from the disc and send this information directly to the appropriate decoder ICs, without putting a heavy load on the over-all system performance. Because of this, a CD-i player does not need much RAM or processing power, since all audio and video decoding is performed in realtime without storing large amounts in RAM for later decoding. To enab
