Patent ID: 8285109

Claim:
A video signal recording and reproducing apparatus, which records and reproduces video signals simultaneously, comprising: an input section operable to input a video signal; an intermittent video signal generating section operable to generate a writing intermittent video signal from the input video signal by compressing the input video signal along a time axis per a time T 1 ; a writing section operable to write the writing intermittent video signal onto a disk via a head so as to record the input video signal; a reading section operable to read arbitrary video recorded onto the disk via the head so as to obtain a reading intermittent video signal; an expansion section operable to expand the reading intermittent video signal so as to obtain an original video signal; and a control section operable to control the writing section and the reading section to cause the input video signal to be recorded on the disk and the previously recorded video signal to be reproduced, whereby the reproduced video signal follows the input video signal being recorded with a variable relative time difference, the variable relative time difference being shortened gradually, wherein, the time T 1 is set to be longer than T, where the time T is defined as a sum of seek time required for moving the head to write the unit of the writing intermittent video signal onto the disk, time required for writing the unit of the writing intermittent video signal onto the disk, seek time required for moving the head to read the unit of the reading intermittent video signal from the disk, and time required for reading the unit of the reading intermittent video signal from the disk.