ALEXANDRIA, Va., June 17 -- United States Patent no. 12,315,519, issued on May 27, was assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (Stockholm).
"Frame error concealment" was invented by Sebastian Naslund (Solna, Sweden), Volodya Grancharov (Solna, Sweden) and Jonas Svedberg (Lulea, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A frame error concealment method based on frames including transform coefficient vectors including the following steps: It tracks sign changes between corresponding transform coefficients of predetermined sub-vectors of consecutive good stationary frames. It accumulates the number of sign changes in corresponding sub-vectors of a predetermined number of consecutive good ...