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A Broadcast Film Leader with Audio Channel, Frequency, and Synchronism Test Properties

Universal film leaders, commonly known as “countdowns,” have been an important tool to synch audio and video. In a broadcast production, the material goes through several stages where audio and video are edited and processed, and time is a very precious resource. Also, it is important to minimize possible errors in the production chain. We propose a film leader format that, in a single 10 second clip, would be possible to do a preliminary check on aspects such as surround and stereo channel identification, relative channel level and frequency response, as well as synchronism. The proposed film leader has been tested and integrated in a Brazilian Television Network with very good results.

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