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.