FREE TV AUSTRALIA OPERATIONAL PRACTICE OP-52 Interim Digital File Format for Delivery of Commercials during the Broadcasters ’ Migration to MXF

This Operational Practice will be valid during the interim transitional period, until the implementation by Australian broadcasters of the MXF file format. The document outlines the file format specifications to be used for the delivery of a commercial as a file on either a physical or electronic medium. If a physical medium is used then this document also specifies the number of commercials on each medium. All other aspects of digital delivery of commercials are defined by OP-29. This includes video, audio and closed caption requirements, quality considerations, commercial timing, alignment signals, commercial identification and the delivery system requirements. 2. REFERENCES This Operational Practice references the following documents: AS/NZS 13818.1:2002 Information technology – Generic coding of moving picture