Patent ID: 6339804
Filing Date: 2002-01-15
Classification: G11B

Abstract:
A digital information reproduction apparatus comprising:storing means for storing digital data on a frame basis which is compressed according to a predetermined compression method; reading means for reading the compressed digital data stored in said storing means; parameter-calculation means for calculating a compression parameter value on the frame basis, which is used in the compression of the digital data read out by said reading means; decoding operation means for decoding the compressed digital data read by said reading means, said decoding operation means being operatively connected to receive the compression parameter value calculated in a decoding operation by said parameter-calculation means; reproduction-target-frame selecting means for intermittently selecting a reproduction-target frame among a plurality of frames stored in said storing means in response to a command for a fast-forward or fast-backward operation; parameter-calculation-target-frame selecting means for selecting a parameter-calculation-target frame of the compression parameter value required for the fast-forward or fast-backward operation; and fast-reproduction controlling means for controlling said parameter-calculation means in calculating the compression parameter value of the parameter-calculation-target frame selected by said parameter-calculation-target-frame selecting means and for controlling the decoding of the compressed digital data of the reproduction-target frame that is selected by said reproduction-target-frame selecting means, wherein said parameter-calculation-target frame is selected exclusively for obtaining the compression parameter value, and wherein said parameter-calculation-target frame was not reproduced previously.