Method for signaling a substitution to a terminal, method for substitution by a terminal, and corresponding computer program products, system and terminal

A broadcasting system configured to signal, to a terminal, substitution of a content broadcast via a broadcasting network to which said terminal is connected by a substitute content targeted at least for said terminal, wherein the broadcast system comprises:

• a reprogrammable computation machine or a dedicated computation machine, configured to:
• obtain at least one substitute information packet in a Society of Cable Telecommunications Engineers (SCTE) 35 format comprising a piece of time information, Presentation TimeStamp (PTS), indicative of a time of execution by said terminal of at least one action for the substitution of the broadcast content by the substitute content, said time information corresponding to a date of rendering of an image of said broadcast content with reference to a reference clock embedded in said broadcast content;
• generate at least one event notification message, StreamEvent, in a Digital Storage Media Command and Control (DSM-CC) format and comprising at least one piece of time information from among the at least one time piece of information received via said at least one substitute information packet;
• and
• insert, in a data stream conveying said content broadcast within said broadcast network, said at least one event notification message at a time location prior to said at least one piece of time information in a chronological order of rendering of the images of said broadcast content.