Automatic time-base error correction system

An automatic time-base error correction system comprising:

• a. means for providing an input analog signal and a pilot signal having the same time-base errors;
• b. random access memory means;
• c. read-in addressing means for generating a read-in address signal for said random access memory means having a variable rate in accordance with the rate of said pilot signal;
• d. means for digitalizing the input analog signal at a time specified by said pilot signal;
• e. means for coupling the digitalized signal to a data port of one of said random access memory means as well as means for applying said read-in address signal from one of said read-in addressing means to an address port of said one random access memory means;
• f. read-out clock means for generating read-out clock pulses;
• g. read-out addressing means for generating a read-out address signal having a rate in accordance with said read-out clock means;
• h. means for applying said read-out address signal to an address port of another of said random access memory means as well as means for applying said read-out clock means to said another random access memory means to cause data at a specified location to be read-out said another random access memory means;
• i. means for converting the output of said another random access memory means into analog form;
• j. control means for selecting one of said read-in addressing means to generate read-in addresses for said one of said random access memory means having further means operable to control when said read-out addressing means generates read-out addressess for said another random access memory means;
• and
• k. means to detect when said another random access memory means has had all data read-out and means to interchange read-in, read-out functions of said one random access memory means and said another random access memory means at that time.