Multi-function data signal processing method and apparatus

Details Multi-function data signal processing method and apparatus Multi-function data signal processing method and apparatus

1985-05-23

1985-12-03

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

375 55, 375 34, 332 18, 360 42, 328 14, H03K 1324

Patent

active

045568693

ABSTRACT:
A data signal is processed to change its form and spectral content without introducing undesirable frequency and amplitude effects. Multiple data signal states, which determine the essential characteristics of the output signal wave configuration, are utilized in conjunction with clock signals at a rate substantially in excess of twice the largest frequency component of the data signal in order to read from a memory a bit-duration waveform sample set representing the desired output signal wave configuration. Predistortion to compensate for anticipated transmission effects is also included in that configuration. In one embodiment, an input data signal is in an NRZ format and is processed for conversion to the biphase, or Manchester, format by a ROM table look-up function addressed jointly by the input signal states and the clock signals.

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