The digital signal processor LSI for car acoustic environment reproduction

The authors describe a newly developed LSI (large-scale integrated circuit) digital signal processor for car acoustic environment reproduction. The DS-SP device is able to compensate the sound position image and dynamically change filter programs or coefficients together with filtering operations at the same time. Because of internal random-access memory for instructions and filter coefficient storage, the device's operations are not limited to its memory size, and its instructions and filter coefficients are dynamically changed without disturbing sound processing. The following features of this processing unit are described: architecture, internal block, instruction set, and support tools.<>