By Jörg Wilberg
Codesign for Real-Time Video Applications describes a latest layout procedure for embedded platforms. It combines the layout of undefined, software program, and algorithms. typically, those layout domain names are handled individually to lessen the layout complexity. complicated layout instruments aid a codesign of the various domain names which opens a chance for exploiting synergetic results.
The layout process is illustrated by way of the layout of a video compression procedure. it truly is built-in into the video card of a laptop. A VLIW processor structure is used because the foundation of the compression method and well known video compression algorithms (MPEG, JPEG, H.261) are analyzed. a whole top-down layout stream is gifted and the layout instruments for every of the layout steps are defined.
The instruments are built-in into an HTML-based layout framework. The ensuing layout facts might be at once built-in into the WWW. it is a the most important element for helping allotted layout teams. The layout info should be without delay documented an go referencing in a virtually arbitrary manner is supported. this offers a platform for info sharing one of the diverse layout domain names.
Codesign for Real-Time Video Applications specializes in the multi-disciplinary features of embedded approach layout. It combines layout automation and complex processor layout with a big program area. A quantitative layout process is emphasised which focuses the layout time at the most important parts. hence allowing a quick and value effective layout technique.
This e-book might be of curiosity to researchers, designers and executives operating in embedded approach design.
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66 In general, the requirement analysis shows the effect of mapping different applications on a fixed data path and it provides a way to estimate the effects of changing the algorithms or the software implementations. 2. The results of applying these tools to the analysis of the video compression system are presented in section 7. , the pathlength for processing one data block using a specific instruction-set. This result permits to compare the overall complexity of different compression programs.
This reduces the design efficiency. Memory controller. This unit performs the memory management tasks. It involves the managing of the different data streams in the video compression system. etrieving of compressed video data in a DMA like fashion), and cache misses must be handled. Video in/out interfaces. The interfaces contain FIFOs for buffering incoming and outgoing data. This gives the memory controller more freedom in handling the different data streams. The memory controller can poll the interfaces for new data at regular intervals.
Different generations of VLIW processors are not binary compatible. This is not an important issue for embedded system design since the code for embedded system will normally be recompiled anyway, but binary compatibility is an important topic for general-purpose processors [ 195]. The generic structure of a VLIW processor and a typical instruction word are shown in Fig. 6. The processor can be subdivided into two main parts: the control unit and the datapath. The control unit fetches one instruction per cycle.