A slot-in optical disk drive includes a power unit to drive a sliding component to rotate a loading bar, so as to process loading procedure of the slot-in optical disk drive. The channel encoding and decoding methods are universal such that a single encoder and a single decoder can be used to implement all the forward error-correction codes of different code rates. In addition to or instead of the data of the digital signal, the series of data transmitted by the transmitter contains context data which the receiver uses to interpret and process the originally captured motion data within a defined context.