Integrated Replicat is a feature unique to Oracle GoldenGate 12c, for Oracle Database versions starting from Oracle 11g (22.214.171.124) and Oracle 12c (12.1.0).
Classic Capture Mode:
The Oracle GoldenGate Extract process captures data changes from the Oracle redo log files or archive log files on the source database system.
Integrated Capture Mode:
Oracle GoldenGate Extract process works directly with the database log mining server which reads the database redo log files and captures the changes in the form of Logical Change Records (LCRs). This is then to the GoldenGate trail files.