Patent ID: 7796078

Claim:
A method, comprising: converting an analog signal to a sequence of sets of N signal samples, the sequence including a current set and a previous set, using a plurality of N parallel, time-interleaved analog to digital converters that are configured to form sets of N samples of the analog signal during respective clock intervals and to output corresponding sets of N signal samples at a clock rate that is the inverse of the clock interval, where a nth signal sample in each set is output from a nth analog to digital converter, where the signal samples of each set represent consecutive samples separated in time by a sampling interval, wherein the sampling interval has a duration of the clock interval divided by N; delaying the N signal samples of the previous set, wherein the nth signal sample in the previous set is delayed for one clock interval by a corresponding delay element, to form N delayed signal samples, wherein the N delayed signal samples represent consecutive samples of the previous set separated in time by the sampling interval; selecting N corresponding offset signal samples from the N delayed signal samples, wherein each corresponding offset signal sample is separated in time from a corresponding nth signal sample in the current set by a predetermined number of sampling intervals, wherein the predetermined number of sampling intervals is at least N; adding or subtracting the N corresponding offset signal samples to or from the N signal samples of the current set to form N modified samples corresponding to the current set; and encoding the N modified samples to form N compressed samples corresponding to the current set.