| 摘要 |
FIELD: information technology. ^ SUBSTANCE: adaptive differential pulse-code modulator comprises an analogue speech signal source, a time sampling circuit, a sample converter, a subtractor, an adaptive predictor, a short periodic pulse generator, a univibrator, two time differentiators with an inverting output, an analogue frequency modulator, an analogue signal multiplier, a signal amplitude limiting amplifier, a pulse counter, a shift register, a clock pulse generator, a digital inverter and an integrator. ^ EFFECT: high quality of reconstructed speech owing to elimination of quantisation noise. ^ 3 dwg |
