Abstract: Systems, apparatuses and methods involving centralized memory management capable of allocating and de-allocating memory for all subsystems dynamically.

Abstract: Systems, apparatuses and methods for efficient logical memory management using centralized memory management. One embodiment involves allocating a first memory region to a first subsystem, generating a region code associated with the allocated memory region, storing the region code in connection with an address of the memory region, and defining the first subsystem as a first owner for the memory region by storing a unique subsystem identifier together with the region code in a parameter table. In this manner, a memory region may be globally addressed by its region code and an ownership to a subsystem is defined and stored.

Abstract: A projector screen is shown comprising one or more markers arranged to be used by projection processing circuitry to calculate a user perceived distortion in an image to be projected on the projector screen. A related method, computer program and projection processing circuitry are also shown.

Abstract: A method for adapting a bus to data traffic in a system comprising several functional units (311, 312, . . . , 31n) and a bus structure. The functional units are divided into at least two sets so that units, which mainly transfer data with each other belong to a same set and are interfaced with the same separate sub-bus (321; 322). The sub-buses can be united by switches (SW) into a more extensive bus, which is only used when data must be transferred between different sets. Supply voltage of each sub-bus is adjustable and is set the lower the less traffic there is on the bus. The parallel transfer operation makes it possible to increase the transfer capacity of the bus structure without increasing it's clock frequency. Furthermore energy consumption can be reduced by dropping the supply voltage of the bus circuits so that the bus retains the transfer capacity needed.