Abstract: A data processing system including a storage section, a processing section, a control section, and a memory. The control section performing an action to allocate, to all of the ports, a time slot of a period of time which guarantees one seek action within a cycle time period which is the shortest time period within which it is permitted for the ports to successively accept a readout instruction, allocate, when another readout instruction is received, two or more time slots to that one of the ports which is designated by the readout instruction within a first cycle time period, and allocate one time slot to the port designated by the readout instruction within a second cycle time period after the first cycle time period.

Abstract: A data processing system including a storage section, a processing section, a control section, and a memory. The control section performing an action to allocate, to all of the ports, a time slot of a period of time which guarantees one seek action within a cycle time period which is the shortest time period within which it is permitted for the ports to successively accept a readout instruction, allocate, when another readout instruction is received, two or more time slots to that one of the ports which is designated by the readout instruction within a first cycle time period, and allocate one time slot to the port designated by the readout instruction within a second cycle time period after the first cycle time period.

Abstract: Information recording/reproducing system decodes an MPEG data stream constituted of one-grouped pictures of I2, B0, B1, P5, B3, B4, P8, B6, B7, P11, B9, B10, P14, B12, and B13 in turn on B picture, P picture and I picture to become the MPEG data stream constituted of one-grouped pictures of I2, P5, B3, B4, P8, B6, B7, P11, B9, B10, P14, B12, B13, I2, B0, and B1 in turn on the B picture, the P picture and the I picture. The system produces a reproduced image that is constituted of one-grouped pictures of I2, B3, B4, P5, B6, B7, P8, B9, B10, P11, B12, B13, P14, B0, and B1 in turn on the B picture, the P picture and the I picture. The reproduced image can prevent any necessary picture from being lacked and get any smoothly reverse reproduction images.