Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1994-04-04
1996-10-01
Epps, Georgia Y.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 58, 369 32, G11B 509
Patent
active
055616496
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a disk recording medium and a reproduction method and apparatus therefor, and, more particularly, to a compact disk (CD) system.
BACKGROUND ART
The CD is a recording medium in which an optically modulated large capacity digital data signal (at maximum 800 Mb) can be stored in a disk having a diameter of about 12 cm. Such CDs include: an audio exclusive-use CDDA which stores digital audio data; a compact disk graphics (CDG) or compact disk enhancement graphics (CDEG) medium for providing lyrics and graphic background pictures as well as audio by storing digital audio data, character data and graphic data therein; a CDV for storing digital audio data together with video data therein; a CD-ROM which can be used as a data base, electronic publication, etc., by storing various data and computer program data therein; and a compact disk interactive (CDI) system for use in multi-media systems by storing audio, video, character and computer program data therein. The physical recording formats of such CDs are based on the recording format of the CDDA. The data recording areas of the CD are largely classified into a lead-in area (LIA), a program area (PMA) and a lead-out area (LOA). In the CDDA, the digital audio data signal is recorded in the PMA, and then program running time and contents information (i.e., a "table of contents") is recorded in the LIA. Thus, the CD reproducer reads the recorded table of contents from the LIA prior to reproduction, and seeks a selected program to reproduce the corresponding program. The LIA consists of eight sub-code channels P, Q, R, S, T, U, V and W. The "table of contents" information utilizes the Q-channel and includes the program number and running time of a maximum of ninety-nine programs. The CDG utilizes R through W sub-code channels which are not used in the CDDA and includes a graphic function for visually displaying lyrics and images corresponding to the songs of a karaoke apparatus. Since such a CDDA or CDG searches the programs of the PMA with reference to the table of contents of the LIA, the number of programs which can be stored in the PMA is limited. For example, since one CD has a maximum capacity of 800 Mb, 8,000 still images each having a size of 100 Kb can be recorded thereon. However, table-of-contents information corresponding to 8,000 still images cannot be completely stored in the existing LIA region.
The CD-ROM and CDI reformulate an audio data block comprising 98 frames, which is a data processing unit, into that of a sector unit, in order to record or process the reformulated audio data block (refer to U.S. Pat. No. 4,893,193). A CD-ROM driver is connected to a host computer (a personal computer) and performs a dependent reproduction operation by a CD-ROM operating program which is loaded onto a hard disk or floppy disk of the host computer. Thus, since the CD-ROM should use a particular host computer, compatibility between systems is essential. Accordingly, home distribution of CD-ROM systems is limited. To satisfy the compatibility requirements, a CDI system integrally includes in the CDI reproduction apparatus, the additional elements of a computer, a character reproduction circuit, an audio reproduction circuit and a computer data reproduction circuit. That is, the CDI system is a reproduction exclusive-use computer in which the hard disk or floppy disk of the computer is replaced by the CDI disk. Such a CDI system can access substantial amounts of data only by an application program contained on the disk, which, in terms of its operating system, is very similar to an ordinary personal computer. Accordingly, since the CDI system requires a particular operating system (OS), for example, a CD-RTOS (OS-9/68,000), and application program, the cost is increased due to specific software needs. The computer cannot directly access the data location recorded on the disk, and accordingly, the computer must access the data location via the OS or application program, which is troublesome.
On the other hand, a
REFERENCES:
patent: 5130966 (1992-07-01), Yoshio et al.
Byeon Seong-jin
Choi Hae-min
Choi Kwang-sik
Jeon Hwa-jin
Lee Deok-hyun
Epps Georgia Y.
Huber P. W.
Samsung Electronics Co Ltd.
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