Abstract: An absolute time area is expanded by using an area of relatively low importance such as zero-data area and/or relative time area or the like in a Q channel in a sub-code in a recording format of a CD. Thus, an absolute time expression which can cope with a disc having a large capacity or the like can be performed. An absolute time expression is performed in a manner such that a digit of “100 minutes” is BCD expressed by using lower 4 bits in the 8-bit zero-data area ZERO. Thus, the absolute time of up to 999min59sec74frame can be expressed. A digit of “hour” is also expressed by using the lower 4 bits in the zero-data area. For example, identification information showing that a disc is a high density optical disc of large capacity is expressed by using the upper 4 bits in the zero-data area ZERO.

Abstract: Formatting is applied only to a local area which is a part of the entire recordable area of a rewritable disk and which does not include portions where a lead-in area and a lead-out area are to be formed. In other words, only the required minimum area is formatted. The formatted area is extended afterwards as required. Thus, disk formatting is shortened.

Abstract: A data record medium on which a digital signal has been recorded in which the digital signal is composed of main data and a sub code, the sub code having time information representing reproduction elapsed time, and the sub code being recorded in association with the main data, wherein information that represents the reproduction elapsed time of the sub code is represented with a binary coded decimal number and address information in synchronization with the time information of the main data is represented with a binary number, the address information being contained in the main data.

Abstract: A data recording medium having an address-representing portion formed of a predetermined number of bits for representing time information composed of minutes, seconds, and frames in a binary coded decimal notation, wherein addresses represented in a binary notation instead of the binary coded decimal notation are placed in the address-representing portion.

Abstract: Formatting is applied only to a local area which is a part of the entire recordable area of a rewritable disk and which does not include portions where a lead-in area and a lead-out area are to be formed. In other words, only the required minimum area is formatted. The formatted area is extended afterwards as required. Thus, disk formatting is shortened.

Abstract: In an information recording method and its device to sequentially write data on a recording medium on a fixed data basis, a command to write the first data formed of the fixed data basis is transmitted from the fixed file system to the writing means of the recording medium, and an actual write result of the first data is returned from the writing means to the file system delaying for the fixed number of commands from the time of transmitting the first data. By inserting link blocks on the data sequence to be recorded on the recording medium and sequentially writing a plurality of packets, the write position shift can be prevented, and by returning an actual write result delaying for the predetermined number of commands, the data writing that is error retrievable using the write cache can be realized.

Abstract: An information recording method based on a recording format in which when information is recorded on an information recording medium by a recording means, accompanying information concerning at least the information recording medium or recording information is repeatedly recorded a plurality of times together with the recording information comprises the steps of searching a recording failure position in an area in which the accompanying information is to be recorded when a recording of the accompanying information is failed, moving the recording means from a recording start position to the recording failure position, and recording the accompanying information from the recording failure position by the recording means based on the recording format.

Abstract: A recording apparatus, a reproducing apparatus and a multi-session disc-shaped recording medium (CD-R disc) having a first session comprised only of audio tracks, a first disc code specifying the audio session and which is recorded in the lead-in area of the first session, and a second disc code which is recorded in the remaining sessions on the CD-R disc.

Abstract: A control apparatus for use with a recordable recording medium, such as a write once compact disc (CD-WO), in accordance with a SCSI-2 interface previously defined for a pre-recorded recording medium, such as a normal CD, automatically sets and updates attribute information needed for recording the CD-WO. When the CD-WO is blank or partially written, track information pages, in addition to a disc information page, are used to manage recording medium attribute information. The disc and track information pages are associated with corresponding disc and track changeability information pages.

Abstract: When a previous recording of data on a write-once optical disc is incomplete, the previous recording is processed to enable it to be read, and to enable additional data to be recordable on the write-once optical disc following the incomplete previous recording. The previous recording, when incomplete, lacks at least an end portion that would be included in the previous recording when complete. The previous recording is tested to determine whether it is incomplete. When the previous recording is detected as being incomplete, the position of the end of the previous recording is determined, a pseudo signal is generated for recording on the write-once optical disc, and the pseudo signal is written on the write-once optical disc, starting at the previously-determined position of the end of the previous recording. Writing the pseudo signal appends to the previous recording an additional recording that includes a replacement for the end portion lacking from the incomplete previous recording.