A coded signal reproduction apparatus comprising end code sequence detection means for detecting, from code sequences of coded data, a code sequence indicating the end of the coded data; and formatter means for adding a predetermined number of pseudo data to the rear of the code sequence indicating the end of the coded data so that the data bus width of pipeline transfer including the end of the coded data becomes equal to the bus width of pipeline transfer including other data, when a code sequence indicating the end of the code data is detected. Data transfers inside the pipeline in the reproduction apparatus can be performed to the end of coded data which is shorter than the data bus width in the pipeline. The coded signal reproduction apparatus inserts a specific code sequence in the last packet of the packet sequence before adding pseudo data.