By Jörg Wilberg
Codesign for Real-Time Video Applications describes a contemporary layout process for embedded platforms. It combines the layout of undefined, software program, and algorithms. typically, those layout domain names are handled individually to minimize the layout complexity. complicated layout instruments help a codesign of different domain names which opens a chance for exploiting synergetic results.
The layout procedure is illustrated via the layout of a video compression method. it really is built-in into the video card of a computer. 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. an entire top-down layout circulation 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 info could be at once built-in into the WWW. this can be a an important point for aiding dispensed layout teams. The layout facts may be at once documented an move referencing in a nearly arbitrary approach is supported. this gives a platform for info sharing one of the diversified layout domain names.
Codesign for Real-Time Video Applications specializes in the multi-disciplinary features of embedded approach layout. It combines layout automation and complicated processor layout with a tremendous software area. A quantitative layout procedure is emphasised which focuses the layout time at the most important parts. hence allowing a quick and price effective layout technique.
This ebook may be of curiosity to researchers, designers and executives operating in embedded process design.
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For example, DCT based algorithms tend to introduce block artifacts which are especially disturbing in case of high image qualities. Wavelet or subband coding algorithms avoid these artifacts. Another alternative are fractal based coding techniques. In comparison to JPEG, the fractal coding produces images which are more pleasant for a human viewer, in particular if very low bit rates are used [46]. 4. summarizes alternative implementations to the coding tasks specified in the standard compression algorithms.
The utilization defines the fraction of the peak performance that is used to perform useful operations. All other operations are essentially nops which occur due to data dependencies or resource conflicts. 1 as an equality 1 -:-:-----:-:=--- blockRate ap = block 1 util· ope 1 /elk The main point of interest for the processor design is the most suited number of ope that the processor hardware should provide. Thus we solve for the ope to obtain the basic design equation. It will be refined during the quantitative analysis ope = _1_ .
Therefore, a guideline for the optimization is given by gradually refining the relaxed processors. The reduction of the design space is controllable without implementing all possible processor variants. The designer can focus on specific processor structures without neglecting the evaluation of possible design alternatives. Data transfer analysis. Typically the interconnection network of a datapath has a significant influence on the performance. The performance will severely degrade if, for example, frequently used data transfers are not supported by direct connections among the functional units.