Development of a solid state sound recorder system

A solid state sound recorder system LSI was developed for use in sound recorder equipment. The LSI used a novel audio compression algorithm and enhanced large capacity memory management to eliminate the need for magnetic tape recording. The LSI used external memory devices to store audio data. Up to 32 Mbit of DRAM (dynamic RAM) can be used, and DRAM, SRAM (static RAM), and ROM can be used individually or in a mixed format for flexibility in system design. The LSI memory control circuitry can automatically detect and bypass a faulty location in memory. The memory management circuits also ensure that there is no delay in recording and replay.<
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