Patent ID: 6801378
Filing Date: 2004-10-05
Classification: G11B

Abstract:
A data recorder that records a continuous input stream received at a second data rate, to a recording medium at a first data rate, comprising:a memory for storing data at said second data rate while said continuous input stream is input at said second data rate; a data read/write circuit for intermittently reading at said first data rate the data stored in the memory and providing the read data as an output for recording; and a controller for driving the recording medium intermittently to record the data at said first data rate as the data read from the memory is provided as said output from the data read/write circuit; whereby the first data rate is the actual data rate at which the data read/write circuit reads the data from the memory and the second data rate is substantially equal to a mean data rate at which the data read/write circuit reads the data from the memory; and wherein the data read/write circuit starts to read data from said memory when the cumulative amount of data that has been written in the memory becomes greater than a first threshold and the data read/write circuit pauses its reading of said data when the cumulative amount of data that has been written in the memory becomes smaller than a second threshold and said first threshold is greater than a minimum capacity of said memory and said second threshold is lower than a maximum capacity of said memory.