Method and apparatus for extracting digital information from an asynchronous data stream

摘要

A method and apparatus for extracting digital information (111) from an asynchronous data stream (101) is achieved by providing a data stream (101) that is clocked at a data stream clock rate (210). A sampled data stream (103) is produced by sampling the asynchronous data stream at a first clock rate (105), which is independent of the data stream clock rate (210). Using the sampled data stream (103), a recovered clock (107) is generated. The recovered clock (107) is then used to extract the digital information (111) from the sampled data stream (103).