JPS57196641A - Click eliminating system - Google Patents

Abstract

PURPOSE:To reduce the audible sense of incompatibility, by detecting a burst error section of a digital audio signal, zeroing a sample value amplitude of the section and linearly decreasing or increasing the amplitude of sampled values before and after the said section for a prescribed time. CONSTITUTION:A burst error detecting circuit 1 receives a signal input to detect burst error and transmits a detecting signal of generation of burst to a control signal generating section 2. When the signal generating section 2 receives the said signal, the section 2 generates a control output from the input signal. Thus, the signal input is applied to a delay circuit 3. The control output from the signal generating section 2 takes a value according to a function form f1 set by taking the characteristic of audible sense into account. When the circuit 1 detects the recovery of burst error, the control output is obtained according to the function form f2. Further, a multiplication circuit 4 receives the delay signal and the control output and outputs a signal which is corrected to be zero during the generation of burst and weighted with the f1 and f2 respectively for j-sample before the generation of burst and k-sample after the generation of burst.