摘要:
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.
摘要:
Data in CD signal format is recorded to a first portion of an optical disc and compressed digital data in CD-ROM format in double density is recorded to a second portion of the disc, with a blank gap between the first and second portions. Addresses of the first portion are represented in a notation of minute, second, and frame and addresses of the second portion are represented in binary notation. When assigning addresses it is determined whether the first portion is accessed, and when the first portion is accessed the generation of normal addresses is started. When the determined result represents that the first portion is not accessed, the gap length is calculated and the start address of the second session is generated based upon the end address of the first portion and the known gap length. It is then determined whether the second portion has ended. Unless the second portion ends, the generation of the second addresses is continued. When the second portion ends, the generation of addresses is stopped.
摘要:
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.
摘要:
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.
摘要:
Data in the same signal format as a conventional CD is recorded to a first part of a record medium and compressed digital data in CD-ROM format in double density is recorded to a second part of the record medium. Addresses of a first session including the first part are represented in the notation of minute, second, and frame, and addresses of a second session including the second part are represented in binary notation. When the record position is moved from the first session to the second session, an end address of the first session is converted into an address of the second session. The start address is then designated and second addresses (for example, addresses represented in binary notation) are generated. When there is a non-record portion between the two sessions, an address value corresponding to the non-record portion is added to the start address. The resultant address is used as the new start address.
摘要:
CD-ROM data is received to an interface 1. When a high reliability is required, a sector segmenting circuit 4 is selected by a switching circuit 3. The input data is sector segmented to the CD-ROM sector by the circuit 4. When a large recording capacity is requested, a CD-ROM decoder 5 is selected by the switching circuit 3. After the CD-ROM data was error corrected, user bytes in the data are sector segmented into 2-kbyte sector. The data converted into the CD-ROM sector or 2-kbyte sector is integrated to a block structure by the block segmenting circuit 7 and is, further, subjected to processes such as error correction coding and digital modulation by a recording processing circuit 8. A pattern of a sync that is added by the recording processing circuit 8 is made different in accordance with a sector construction. Recording data from the recording processing circuit 8 is recorded onto an optical disc 2 by an optical pickup 10.
摘要:
A memory card drive is provided which can record a large amount of digital information. A plurality of memory card slots is provided in a memory card drive body having a memory interface. A plurality of memory cards is detachably accommodated in the memory card slots. Digital information is recorded into and played back from the memory cards through the memory interface.