ABSTRACT

The stream of bits recovered from the disc is processed through a series of stages which reverse the encoding process which occurred when the signals were recorded. Minor errors can be completely corrected using the eight-to-fourteen redundancy and parity checking built into the system. Major errors may result in the unavoidable loss of information, but most CD players then use a pre-programmed algorithm to 'fill in' or interpolate occasional lost samples. The details of this algorithm for masking information loss will differ from one player to another. The recovered stream of digital values can then be passed to two digital to analog convertors (DACs) for conversion into an output pair of analog audio signals.