Where can I learn more about the history of CD and CD-R?
(1998/04/06) The first thing to know is that there are two kinds of jitter that relate to audio CDs. The usual meaning of “jitter” refers to a time-base error when digital samples are converted back to an analog signal; see the jitter article on http://www.digido.com/ for an explanation. The other form of “jitter” is used in the context of digital audio extraction from CDs. This kind of “jitter” causes extracted audio samples to be doubled-up or skipped entirely. (Some people will correctly point out that the latter usage is an abuse of the term “jitter”, but we seem to be stuck with it.) “Jitter correction”, in both senses of the word, is the process of compensating for jitter and restoring the audio to its intended form. This section is concerned with the (incorrect use of) “jitter” in the context of digital audio extraction. The problem occurs because the Philips CD specification doesn’t require block-accurate addressing. While the audio data is being fed into a buffer (a FIFO whose
