DIGITAL SIGNAL PROCESSING PROCESSOR

摘要

PURPOSE:To save useless operation to suppress required arithmetic quantity effectively and to make the processing time efficient by adopting the constitution such that a minimum distortion is compared with the result of calculated distortion for each cycle at the calculation of distortion between blocks and a number of a block giving the minimum distortion is stored. CONSTITUTION:The result of accumulation supplied from an output path 62 of an accumulator 7 via a branched output path 105 and an output data supplied from a minimum distortion register 10 via an output path 106 are compared for each cycle by a comparator 11. The accumulation is executed for a number of times provided in a repeat counter 9 and when the accumulation is finished normally, the write update of a value of an accumulation register 8 to a minimum distortion register 10, the write update of a value of a block counter 12 to a minimum distortion position register 13 and the control of the block counter 12 by an increment control signal are implemented.