Method and apparatus for converting between a logical block address (lba) and a minute second frame (msf) location on a data carrier such as a cd-rom

Abstract

An LBA/MSF converter includes a decade selector, the decade selector receiving a first input and generating a decade selector output corresponding to a decade of the first input. An operand selector receives the decade selector output and outputs an operand corresponding to the decade selector output. An adder outputs the sum of the first input and the operand, the sum being an MSF value corresponding to the first input when the first input is an LBA value, and a subtractor outputs the difference of the first input and the operand, the difference being an LBA value corresponding to the first input when the first input is an MSF value. A method of converting between an LBA and an MSF location on a data carrier includes steps of receiving a first input, determining a decade of the received first input, selecting an operand corresponding to the determined decade, adding the first input and the selected operand to generate a first output, the first output being an MSF location when the received first input is an LBA address, and subtracting the selected operand from the first input to generate a second output, the second output being an LBA address when the received first input is an MSF location. Such methods and devices allow the conversion between LBA and MSF address formats of a data carrier such as a CD-ROM without invoking the functional block(s) of the electronic design automation software predefined for that purpose.