Method and apparatus for use in processing signals

Abstract From the Canadian patent

As original dialogue recorded live at the time of shooting of a motion picture is often of unacceptable quality a technique known as post-synchron-, ising, wherein the dialogue is re-recorded in a studio and mixed with music and sound effects to form the final sound track has evolved. A major problem with, this technique is in ensuring synchronism between words and mouth movements. In accordance with a preferred embodiment of the present invention a computer system with a large disc storage is arranged to record and automatically postsynchronise new dialogue with an original guide track. The system adjusts the timing of the new words primarily by altering the duration of the silent gaps …