Circuit for providing digital data having high clarity in a digital signal receiver

An apparatus for providing output data having high clarity based on previous data and time-series digital input signals within a time period, comprising:

• counter means for cyclically counting clock signals produced by a clock in the time period;
• a plurality of input signal processing means, each receiving a corresponding one of the input signals, for detecting corresponding first comparison results between plurality of corresponding input data extracted from corresponding input signals by said clock and a plurality of corresponding previous data extracted by said clock, the first comparison results being selected from a coincident result and a non-coincident result;
• count value storage means for storing a first counter value provided by said counter means in each memory location corresponding to each corresponding input signal processing means detecting the first comparison result having the non-coincident result;
• comparing means for comparing first counter values stored in corresponding memory locations with a second counter value provided by said counter means in order to output a corresponding second comparison result for each corresponding first comparison result having the coincident result detected by the corresponding input signal processing means, wherein the second comparison result is selected from the coincident result and the non-coincident result;
• and
• output means for storing corresponding input data as corresponding output data for corresponding second comparison results having the coincident result detected by said comparing means.