Disclosed is an idler for a tape recorder that can selectively transmit a driving force from a capstan motor to a take-up reel or a supply reel depending upon a rotational direction of the capstan motor. A method for inserting parity into a frame control header includes channel-encoding, by an additional channel encoder, a frame control header bit applied to a legacy encoder, and generating an additional codeword, and mapping the codeword generated by the legacy encoder and the additional codeword to subcarriers. For example, the event may be a sports event and the object may be a stationary object which is detected based on a known location, color and shape.