Abstract: Methods and apparatus, including computer program products, for block diagram modeling, including generating a block diagram containing blocks interconnected by lines on a graphical user interface (GUI), specifying frame and channel information, the frame and channel information including a frame length, a number of channels, a frame category and an inter-sample spacing, and propagating the frame and channel information available at each of subsequent blocks in the block diagram.

Abstract: A system and method that includes line connection navigation in a block diagram by highlighting connections through navigable blocks in the diagram, edit-time label propagation along connections and through navigable blocks that can propagate labels through their ports, API to define navigability between block ports, and displaying implied connections between blocks.

Abstract: A method of addressing a signal I/O buffer in a block of a block diagram model includes determining a base address, an element offset, a wrap-around size, a starting offset and a stride factor.

Abstract: A method of controlling the conditional execution of elements and subsystems in a block diagram is disclosed. Data structures known as Execution Contexts are created and associated with individual block diagram elements and subsystems. The Execution Contexts allow execution of the associated element or subsystem upon satisfaction of a specified pre-condition. The Execution Contexts may be inherited by other elements and subsystems in the block diagram and propagated programmatically throughout the block diagram. The use of the Execution Contexts allows for efficient code generation and block diagram execution, as well as supporting modular design concepts.