TY - JOUR AU - Menard, D. AU - Serizel, R. AU - Rocher, R. AU - Sentieys, O. PY - 2008 DA - 2008/10/13 TI - Accuracy Constraint Determination in Fixed-Point System Design JO - EURASIP Journal on Embedded Systems SP - 242584 VL - 2008 IS - 1 AB - Most of digital signal processing applications are specified and designed with floatingpoint arithmetic but are finally implemented using fixed-point architectures. Thus, the design flow requires a floating-point to fixed-point conversion stage which optimizes the implementation cost under execution time and accuracy constraints. This accuracy constraint is linked to the application performances and the determination of this constraint is one of the key issues of the conversion process. In this paper, a method is proposed to determine the accuracy constraint from the application performance. The fixed-point system is modeled with an infinite precision version of the system and a single noise source located at the system output. Then, an iterative approach for optimizing the fixed-point specification under the application performance constraint is defined and detailed. Finally the efficiency of our approach is demonstrated by experiments on an MP3 encoder. SN - 1687-3963 UR - https://doi.org/10.1155/2008/242584 DO - 10.1155/2008/242584 ID - Menard2008 ER -