Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal processing of sectioned information
Reexamination Certificate
2000-12-28
2004-02-24
Hindi, Nabil (Department: 2655)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal processing of sectioned information
C369S053210
Reexamination Certificate
active
06697314
ABSTRACT:
BACKGROUND OF THE INVENTION
i) Field of the Invention
The present invention relates to an information reproducing apparatus for reproducing information from an information storage medium and an information recording apparatus for recording the information in the information storage medium.
ii) Description of Related Art
An information recording apparatus for recording information in information storage mediums such as DVD, CD and magnetic disk has been heretofore known. In general, such information recording apparatus also serves as an information reproducing apparatus for reproducing the information from the information storage medium. Moreover, the information recording apparatus or the information reproducing apparatus is connected to or incorporated in host systems such as a personal computer and a player CPU as a storage apparatus of the host system, and utilized in a broad field. These information recording apparatus and information reproducing apparatus perform information reproducing and information recording with respect to the information storage medium in accordance with an instruction from the host system.
In general, the information storage medium is subjected to a physical format, and a recording area is divided into physical sectors. A sector head is constituted to be able to be recognized by a pit or a magnetic mark, and one sector can be said to be a unity for bytes by which drives such as the information recording apparatus and information reproducing apparatus can efficiently perform the information reproducing and information recording. In general, one sector is constituted of the number of bytes which is integer times the minimum number of bytes processable by the host system, for example, 512 B (bytes), 1024 B (bytes), 2048 B (bytes), or the like. Moreover, the information recorded in the information storage medium or the information reproduced from the information storage medium is usually transferred by a sector unit between the host system and the information reproducing apparatus.
Additionally, the amount of the information whose reproducing or recording is required by the host system is not limited to the information amount being an integer times a sector capacity, and the reproducing and recording are necessary with respect to th information of the information amount corresponding to an application program. Therefore in a conventional art, when information transfer is performed between the host system and the information reproducing apparatus, the host system obtains the amount of the information to be transferred by setting the amount to be equal to the information amount of the sector unit, and a burden on the host system is large.
Moreover, in order to set the information amount unit during information transfer to be equal to the sector unit, in addition to the information whose reproducing or recording is required by the host system, unnecessary information also needs to be transferred, and waste of a transfer time occurs.
Furthermore, for an information storage medium in which personal security information and the like are stored, it is unsafe from a standpoint of information protection to reproduce and transfer even the security information unnecessary for the host system.
From these situations, the information reproducing apparatus and information recording apparatus in which information transfer is possible by the information amount unit different from the sector unit have been demanded, but such information reproducing apparatus and information recording apparatus have not been realized.
SUMMARY OF THE INVENTION
In consideration of the aforementioned situations, an object of the present invention is to provide an information reproducing apparatus and an information recording apparatus in which information transfer is possible by an information amount unit different from a sector unit. By realizing such information reproducing apparatus and information recording apparatus, it is possible to lighten a burden on a host system, avoid a waste of a transfer time, or to raise an information protection level.
To achieve the aforementioned object according to the present invention there is provided an information reproducing apparatus for reproducing information from an information storage medium in which a storage area is divided into physical sectors as minimum units for performing information recording and information reproducing, the apparatus comprising:
an information designating reception section in which non-sector unit information constituted by a non-sector unit of an information amount different from the information amount for one sector is designated as the information to be reproduced from the information storage medium;
a reproducing section for reproducing the information for the integer number of sectors including the non-sector unit information designated by the information designating reception section from the information storage medium; and
an output section for extracting and outputting the non-sector unit information designated by the information designating reception section from the information for the integer number of sectors reproduced by the reproducing section.
Moreover, to achieve the aforementioned object according to the present invention there is provided an information recording apparatus for recording information in an information storage medium in which a storage area is divided into physical sectors as minimum units for performing information recording and information reproducing, the apparatus comprising:
an information reception section in which non-sector unit information constituted by a non-sector unit of an information amount different from the information amount for one sector is received as the information to be recorded in the information storage medium;
a reproducing section for reproducing the information for the integer number of sectors stored in the areas for the integer number of sectors including a recording area in which the non-sector unit information received by the information reception section is recorded on the information storage medium;
an information replacement section for replacing the information reproduced from the recording area among the information for the integer number of sectors reproduced by the reproducing section with the non-sector unit information received by the information reception section; and
a recording section for recording the information for the integer number of sectors which is partially replaced by the information replacement section in the areas for the integer number of sectors in which the information is reproduced by the reproducing section.
Here, when the information amount for one sector is, for example, 512 bytes, as the non-sector unit, for example, 50 bytes, 200 bytes, 600 bytes, and the like are considered, and as the information amount of the non-sector unit information, for example, 150 bytes corresponding to three 50 bytes, 800 bytes corresponding to four 200 bytes, and the like are considered.
According to the information reproducing apparatus of the present invention, the non-sector unit information is designated as reproducing information, and the designated non-sector unit information is outputted. Moreover, according to the information recording apparatus of the present invention, the non-sector unit information is received as recording information, and the received non-sector unit information is recorded in the information storage medium.
Therefore, between the host system for instructing the information reproducing apparatus or the information recording apparatus to reproduce or record the information and the information reproducing apparatus or the information recording apparatus of the present invention, the reproducing information or the recording information required by the host system can be transferred by the information amount unit which is different from the sector unit. Therefore, in the host system, a trouble of setting the amount of the information to be transferred to be equal to the information amount of the sector unit becomes
Anzai Ichiro
Fukawa Kiyotaka
Fujitsu Limited
Greer Burns & Crain Ltd.
Hindi Nabil
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