We have successfully developed a new PerfecTV! IRD(1ntegrated Receiver Decoder) with several features utilizing advanced merits of digital satellite broadcasting. This paper describes these features including a structure of the hardware and software, an algorithm of a data filtering method, and special functions that viewers can operate easily.(3) additional data service as well as video and audio (4) data broadcasting like PC software download (5) interactive service like NVOD(near video on demand)We focused on the Japanese market, and by fully utilizing a 32bit RISC processor, we developed the PerfecTV! IRD with many useful features. This paper deals with the system and feature description of the developed IRD.information
Methods t,o derive an efficient memory access pattern for DSPs of which memory is accessed only by address registers (ARs), are discussed. Variables in a program and AR operat,ions are modeled by an access graph. A novel memory allocation met,liod. which removes cycles and forks in a given access graph, and decides an efficient address location of variables in memory space, is proposed. In order to utilize multiple ARs, methods to assign variables into ARs are investigated. The method based on min-cut algorithm is superior to the method based on the simulated annealing technique. The proposed methods are applied to the compiler for DSP56000 and generated codes for several examples are very much improved.
Address location andConveiitional[3] 4C.15.3 154 4C.15.4
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