Patent ID: 6031806
Filing Date: 2000-02-29
Classification: G11B,H04N

Abstract:
An information signal recording and reproducing apparatus for selecting an arbitrary region of a recording medium and recording and reproducing, whereinan information signal recorded on said recording medium is constructed by a main signal and additional information which was made correspond to said main signal, said additional information is constructed by time information showing a recording time of said main signal and content information showing the contents of said main signal,and said apparatus comprises:reference information holding means for holding preserving period information of every said content information; andcontrol means for performing processes such thatthe presence or absence of a vacant region is detected, when said vacant region exists, the signal is recorded into said vacant region,when said vacant region doesn't exist, said additional information of a recorded region is reproduced, an elapsed time of the recorded region is calculated from said time information in said reproduced additional information and present time information,whether the recorded region can be erased or not is decided from said elapsed time and said preserving period information corresponding to said content information in the reproduced additional information, and the signal is recorded to the recorded region which was determined to be erasable.