Wetherall, David, J., An Interactive Programming System for Media Computation, Technical Report MIT/LCS/TR-640, MIT, September 1994.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....modules that pass dynamically typed and time stamped payloads through input and output ports. The timestamps, which may be generated by the remote appliances, allow for the eventual resynchronization of the virtual time stream with the real world. Figure 4 depicts the visual programming interface [4] to a completely digital receiver. The in band software pipeline mimics the block diagram of a conventional hardware based receiver. However, by simply changing the function of the RecFilterblock, while the receiver is running, the type of demodulation or channel assignment can be changed. ....

Wetherall, David, J., An Interactive Programming System for Media Computation, Technical Report MIT/LCS/TR-640, MIT, September 1994.

....that pass dynamicallytyped and time stamped payloads through input and output ports. The time stamps, which may be generated by the remote appliances, allow for the eventual resynchronization of the virtual time stream with the real world. Figure 4 is a mock up of the visual programming interface [15] to a software based receiver. The in band software pipeline mimics the block diagram of a VuSystem programming environmen1 operating systerr Figure 3: The ViewStation VuSystem architecture. 7 conventional hardware based receiver. However, by changing the function of the RecFilterblock, ....

Wetherall, David, J., An Interactive Programming System for Media Computation, Technical Report MIT/LCS/TR-640, MIT, September 1994.

....functions as well as JPEG compression and decompression. A Tcl library for user interface programming with over 50 script files has also been developed by the users. We have found it easy to reuse these modules and Tcl scripts in new applications. Interactive Programming with PAVES Wetherall [27] has developed an interactive and graphical environment for controlling VuSystem applications. Users interact with PAVES (for Programming Active Video with an Embedded System) through a flow graph representation of the running program. A flow graph perspective emphasizes the computation that ....

D. J. Wetherall. An Interactive Programming system for Media Computation. Technical Report MIT/LCS/TR-640, Laboratory for Computer Science, Massachusetts Institute of Technology, September 1994.

....in reconfiguring applications at run time. The VuSystem has a run time visual and textual programming environment that allows a user to quickly and easily reconfigure an existing program either by entering Tcl commands to be interpreted or by simply moving around graphic representations of modules [25]. This makes the VuSystem a programming environment well suited to the creation, debugging, and testing of media applications. There are several reasons why the VuSystem is an appropriate platform for this research. First, it is a working programming system which, when coupled with its companion, ....

David J. Wetherall. An interactive programming system for media computation. Master's thesis, MIT, Aug 1994. MIT/LCS/TR-640.

....in C to be added to objects. 7 A Visual Programming Example The VuSystem [8] multimedia application of Figure 6 demonstrates the use of Object Tcl. It shows a visual programming interface of a video motion segmentation program. The interface is used to manipulate the program as it runs [14]. The video program is written as an Object Tcl script (using an older embedded version of the language) Code that manipulates the video frames is written in C, while code that controls the user interface is written in Tcl. The program displays the video windows as part of its normal operation, ....

David Wetherall. An Interactive Programming system for Media Computation. Technical Report MIT/LCS/TR-640, Laboratory for Computer Science, Massachusetts Institute of Technology, September 1994.

....in C to be added to objects. 7 A Visual Programming Example The VuSystem [8] multimedia application of Figure 6 demonstrates the use of Object Tcl. It shows a visual programming interface of a video motion segmentation program. The interface is used to manipulate the program as it runs [14]. The video program is written as an Object Tcl script (using an older embedded version of the language) Code that manipulates the video frames is written in C, while code that controls the user interface is written in Tcl. The program displays the video windows as part of its normal operation, ....

David Wetherall. An Interactive Programming system for Media Computation. Technical Report MIT/LCS/TR-640, Laboratory for Computer Science, Massachusetts Institute of Technology, September 1994.

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