A high-performance speech synthesizer chip (SPIC) based on linear predictive coding techniques is presented. The SPIC will normally be used in a 3-chip system configuration including a micro-computer and an external ROM. The speech quality can be tailored to user's requirements. Among the specific features of the SPIC are pitch synchronous synthesis, speech parameters interpolation capability, silence and powerdown mode. Moreover the digital filter output is interpolated at a high sampling rate (32 kHz) to avoid the necessity for off-chip filtering. An 8-bit PCM output (A-law) and a 16-bit linear-coded output are provided. The SPIC can be provided in 2 different bonding configurations : for small system applications (3-chip system) or for larger system configuration.
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