delta encoding
storing or transmitting data in the form of differences (deltas) between sequential data, as opposed to complete files
en-US/ˈdɛltə ɛnˈkoʊdɪŋ/
en-GB/ˈdɛltə ɛnˈkəʊdɪŋ/
storing or transmitting data in the form of differences (deltas) between sequential data, as opposed to complete files