| 摘要 |
<p>The invention relates to a data processing device for recovering digital data which is received in an analogue transmitted signal. According to the invention, the received signal is digitized and a threshold is determined in a threshold estimator (LVEST). The interference in the channel is corrected in a downstream adaptive equalizer (ADEQ), and a bit clock generator (DPLL) produces the correct sampling rate and phase for the data of a line. The threshold estimator is used to determine the mean value of an input signal for each line, and this value is then taken as the optimum decision value for sampling the data bits for this line. By using an adaptive equaliser, it is possible to correct different types of distortion, caused by the transmission channel, without the need for a training signal. The data processing device according to the invention can thus be used universally for all digital additional signals occuring in a television signal, for example.</p> |
