초록 ▼

An image data transfer system constructed of an image data transfer unit, transmission medium and image data reproduction unit. In the image data transfer unit, an input video signal is transformed into image data through sampling and quantization, the image data are coded in a predetermined image c

An image data transfer system constructed of an image data transfer unit, transmission medium and image data reproduction unit. In the image data transfer unit, an input video signal is transformed into image data through sampling and quantization, the image data are coded in a predetermined image coding method, and transferred to the transmission medium. In the image data reproduction unit, the coded data transferred by the transmission medium are decoded in a predetermined image decoding method, the original video signal is restored from the decoded data. A data transfer speed and transfer scheme are selected such that the total coded data amount for the input video signal over a predetermined time duration becomes equal to or smaller than a transferable data amount determined by a data transfer speed from the transmission medium to the image data reproduction unit and by the predetermined time duration. Data transfer information on the selected data transfer speed or information on the transfer scheme is transferred to the transmission medium along with the coded data.

대표청구항 ▼

An image data transfer method comprising the steps of: transforming an input video signal into image data through sampling and quantization; coding said image data using a predetermined image coding method; transferring the coded image data to a transmission medium; decoding said coded data transfer

An image data transfer method comprising the steps of: transforming an input video signal into image data through sampling and quantization; coding said image data using a predetermined image coding method; transferring the coded image data to a transmission medium; decoding said coded data transferred by said transmission medium using a predetermined image decoding method; and reproducing said decoded data into the original video signal; wherein a data transfer speed for transferring coded image data to the transmission medium is selected such that the total coded data for said input video signal over a predetermined time duration becomes equal to or smaller than a transferable data amount determined by a data transfer speed at the time of decoding said coded data from said transmission medium and by said predetermined time duration; and data transfer information on said selected data transfer speed is transferred to said transmission medium along with said coded data. An image data reproduction apparatus, comprising: an optical disc reproducing unit for reproducing coded data from a transmission medium of an optical disc, said optical disc reproducing unit comprising: (a) an optical disc drive unit having a motor for driving an optical disc; (b) an optical pickup device for reading data stored in said optical disc; (c) a pre-amplifier for amplifying said data read out by said optical pickup device; (d) a data processing circuit for processing the data outputted from said pre-amplifier to separate said data into coded data and data transfer speed information; and (e) a servo control circuit which performs a servo control whereby said motor of said optical disc drive unit is controlled in accordance with said data transfer speed information outputted from said data processing circuit such that the data transfer speed for said data outputted from said pre-amplifier becomes equal to the value of said data transfer speed information; and a moving image decoding unit for restoring an original video signal from said reproduced coded data, said moving image decoding unit comprising: (a) a buffer memory for storing said coded data from said optical disc; (b) an image decoding circuit for decoding said coded data stored in said buffer memory; (c) a frame memory for storing image data from said image decoding circuit; and (d) a D/A converter connected to said frame memory for converting said image data into a video signal.