Abstract: A recording medium on which a plurality of programs are collected in a plurality of groups and supervised in this grouped state, wherein when an editing command such as dividing, linking, and erasing the predetermined programs or groups recorded on the recording medium is executed, management data is edited to perform the editing command. The invention provides a solution to meet this request by a recording medium, an editing method and an editing apparatus.

Abstract: If, in a recording medium on which a plurality of programs are collected in a plurality of groups and supervised in this grouped state, a command for editing, such as dividing/linking/erasing the predetermined programs or groups, recorded on the recording medium, the management data is to be edited to perform the editing. The present invention contemplates to provide a solution to meet this request by a recording medium, an editing method and an editing apparatus.

Abstract: If, in a recording medium on which a plurality of programs are collected in a plurality of groups and supervised in this grouped state, a command for editing, such as dividing/linking/erasing the predetermined programs or groups, recorded on the recording medium, the management data is to be edited to perform the editing. The present invention contemplates to provide a solution to meet this request by a recording medium, an editing method and an editing apparatus.

Abstract: A recording medium on which a plurality of programs are collected in a plurality of groups and supervised in this grouped state, wherein when an editing command such as dividing, linking, and erasing the predetermined programs or groups recorded on the recording medium is executed, management data is edited to perform the editing command. The invention provides a solution to meet this request by a recording medium, an editing method and an editing apparatus.

Abstract: If, in a recording medium on which a plurality of programs are collected in a plurality of groups and supervised in this grouped state, a command for editing, such as dividing/linking/erasing the predetermined programs or groups, recorded on the recording medium, the management data is to be edited to perform the editing. The present invention contemplates to provide a solution to meet this request by a recording medium, an editing method and an editing apparatus.

Abstract: If, in a recording medium on which a plurality of programs are collected in a plurality of groups and supervised in this grouped state, a command for editing, such as dividing/linking/erasing the predetermined programs or groups, recorded on the recording medium, the management data is to be edited to perform the editing. The present invention contemplates to provide a solution to meet this request by a recording medium, an editing method and an editing apparatus.

Abstract: If, in a recording medium on which a plurality of programs are collected in a plurality of groups and supervised in this grouped state, a command for editing, such as dividing/linking/erasing the predetermined programs or groups, recorded on the recording medium, the management data is to be edited to perform the editing. The present invention contemplates to provide a solution to meet this request by a recording medium, an editing method and an editing apparatus.

Abstract: When a data is recorded to a recording medium, a miserasing preventing circuit determines whether or not a track jump is caused by a shock or a scratch. If it is caused by a shock, such as a quantity of light of an optical pick-up is controlled to change a reproducing state, and then the optical pick-up is moved to the rerecording position to start rerecording. As a result, recorded area is not disturbed, and the rerecording control is not performed by a little dust. Thereby, it can be provided an apparatus with high recording efficiency.

Abstract: In a recording method for a recording medium having a data recording area on which a data recording and/or reproducing operation is carried out, and a management data area on which management data to manage a recording and/or reproducing operation for the recording medium are recorded, when new data are recorded on the recording medium in a state where data have been already recorded on the recording medium and a data-recordable area on which the new data can be recorded exists on the data recording area, the recording operation of the new data is started from the head position of the data-recordable area on the basis of the management data recorded on the management data area, and data which have been already recorded on the recording medium are deleted by the same data amount as the new data to be recorded on the data-recordable area from a position on the data recording area of the recording medium at which the recording operation is instructed to start.

Abstract: The present invention provides a method for recording digital data utilizing a digital recording system having a recording area. The method includes a recording step and an erasing step. The recording step includes recording a first digital sequence in the recording area. The first digital sequence is then both preceded by and followed by a non-recordable area. The erasing step includes erasing the first digital sequence, as well as both non-recordable areas from the recording area, pursuant to a command to erase the first digital sequence. A start address and an end address is kept in a management area of the recording medium for each digital sequence stored in the recording area. When a command to erase the first digital sequence is received, a magnetic head and an optical pick-up sequentially erase from an address following an end address of a preceding sequence to an address preceding a start address of a succeeding sequence.

Abstract: A recording/reproducing apparatus is free from a jitter problem caused by a rotational drive of a recording medium such as a magneto-optical disk.

Abstract: Disclosed are a rotation servo circuit and a reproducing apparatus equipped therewith. In the rotation servo circuit, the average value of an inversion probability pattern of a run length code recorded on a recording medium is calculated in advance and, on the basis of the average value thus obtained, a reference rotation voltage is generated, so that a rotation in accordance with the reference rotation voltage is effected whenever a reference number of revolutions is deviated from.

Abstract: In a recording method for a recording medium having a data recording area on which a data recording and/or reproducing operation is carried out, and a management data area on which management data to manage a recording and/or reproducing operation for the recording medium are recorded, when new data are recorded on the recording medium in a state where data have been already recorded on the recording medium and a data-recordable area on which the new data can be recorded exists on the data recording area, the recording operation of the new data is started from the head position of the data-recordable area on the basis of the management data recorded on the management data area, and data which have been already recorded on the recording medium are deleted by the same data amount as the new data to be recorded on the data-recordable area from a position on the data recording area of the recording medium at which the recording operation is instructed to start.

Abstract: A data reproducing apparatus reproduces a data recorded or medium which has auxiliary data added to main data subjected to an error correction coding process. The data reproducing apparatus includes a signal processor, a memory, a comparator and a controller. The signal processor separates the main data from the recording data read out from the recording medium to implement an error correction decoding process thereto. The memory means stores the decoded main data from the signal processor. The comparator compares the last data stored in the memory with the inputted main data to the memory. The controller controls write and read operations of the memory and controls the comparison condition of the comparator according to the main data from the signal processor.

Abstract: A recording/reproducing apparatus is free from a jitter problem caused by a rotational drive of a recording medium such as a magneto-optical disk.

Abstract: A data reproducing apparatus reproduces a data recorded or medium which has auxiliary data added to main data subjected to an error correction coding process. The data reproducing apparatus includes a signal processor, a memory, a comparator and a controller. The signal processor separates the main data from the recording data read out from the recording medium to implement an error correction decoding process thereto. The memory means stores the decoded main data from the signal processor. The comparator compares the last data stored in the memory with the inputted main data to the memory. The controller controls write and read operations of the memory and controls the comparison condition of the comparator according to the main data from the signal processor.

Abstract: A data reproducing apparatus for reproducing main data from a disc on which a data string comprised of main data and auxiliary data appended to the main data at intervals of predetermined lengths of the main data, which main data are previously error correction coded input digital data. The main data are separated from data read from the disc and error-corrected in a decoder. The error-corrected data are stored in a memory. The data stored in the memory are continuously read by a readout control circuit. Data patterns before and after connecting portions of the main data written in or read from the memory are compared in a comparator and the next data are continuously reproduced at a time point when the data pattern coincidence is detected in the comparator.

Abstract: During recording the inputted data are sequentially written into a memory at one transfer rate and are read out at a second, higher transfer rate for recording on a record medium. The reading of the memory is such that data in a preset first amount are successively read from the memory to always ensure a write space in the memory which has a capacity which is higher than a predetermined second amount when the amount of the inputted data stored in the memory exceeds the first amount. During playback, the recorded data are reproduced at a second transfer rate, which is higher than a first transfer rate required for outputting the reproduced data, and are written in the memory. The thus written data are successively read out of the memory as reproduced output data at the first transfer rate.

Abstract: During recording the inputted data are sequentially written into a memory at one transfer rate and are read out at a second, higher transfer rate for recording on a record medium. The reading of the memory is such that data in a preset first amount are successively read from the memory to always ensure a write space in the memory which has a capacity which is higher than a predetermined second amount when the amount of the inputted data stored in the memory exceeds the first amount. During playback, the recorded data are reproduced at a second transfer rate, which is higher than a first transfer rate required for outputting the reproduced data, and are written in the memory. The thus written data are successively read out of the memory as reproduced output data at the first transfer rate.