Novel lamellar mesoporous silica compositions which can contain functional inorganic elements and organic functional groups as part of the lamellar silica framework structure are described. Configuration data includes data bits and parity bits. 264 video signal using the motion vector and the reference picture information generated from the first video decoder; and a storage unit for storing the H. A circumferential arrangement of the ball tracks is made with a uniform pitch, and the circumferential length of the pockets of the cage is made uneven at least at one location.