摘要:
The present invention includes a method of reading and writing data on a recording medium, and a system including a disk drive apparatus and a disk drive apparatus controller. According to the method of the present invention, data can be read in the middle of a plurality of write commands provided that the addresses of the read/write data locations do not overlap. This method and system results in improved read/write times.
摘要:
A data storage device comprising a disk storage medium containing user data in a plurality of sectors wherein each of the plurality of sectors comprises a subdivision of a track, a head for writing or reading the user data and error correcting means for correcting an error that occurs in the user data during the reading process. The error correcting means comprises a syndrome generator for generating syndromes on the basis of the user data, a Euclid circuit, a chien search circuit and a verification circuit, and makes the error correction using a first error correcting code appended to each of a plurality of sectors and a second error correcting code appended to said sector for every block composed of a predetermined number of sectors.
摘要:
The present invention provides a data storage device comprising a disk storage medium containing user data in a plurality of sectors, a head for writing or reading the user data and error correcting means for correcting an error that occurs in the user data during the reading process. The error correcting means comprises a syndrome generator for generating syndromes on the basis of the user data contained in predetermined sectors, registers for storing the syndromes generated and an exclusive OR circuit for exclusive ORing the values stored in the registers.
摘要:
The exclusive OR (XOR) of user data (sector) 0, user data (sector) 1 and user data (sector) 2 is taken to have the virtual user data, thereby giving rise to a correlation of the sectors 0 to 2, and its virtual user data is appended with C2 having a greater error correction capability than C1, whereby an error uncorrectable with C1 is correctable with C2.
摘要:
The present invention provides a data storage device comprising a disk storage medium containing user data in a plurality of sectors, a head for writing or reading the user data and error correcting means for correcting an error that occurs in the user data during the reading process. The error correcting means comprises a syndrome generator for generating syndromes on the basis of the user data contained in predetermined sectors, registers for storing the syndromes generated and an exclusive OR circuit for exclusive ORing the values stored in the registers.
摘要:
An exclusive OR (XOR) of user data (sector) 0, user data (sector) 1 and user data (sector) 2 is performed to provide virtual user data, thereby giving rise to a correlation of the sectors 0 to 2, and the virtual user data is appended with a second error correcting code C2 having a greater error correction capability than a first error correcting code C1, whereby an error uncorrectable with C1 is correctable with C2.
摘要:
An exclusive OR (XOR) of user data (sector) 0, user data (sector) 1 and user data (sector) 2 is performed to provide virtual user data, thereby giving rise to a correlation of the sectors 0 to 2, and the virtual user data is appended with a second error correcting code C2 having a greater error correction capability than a first error correcting code C1, whereby an error uncorrectable with C1 is correctable with C2.
摘要:
The exclusive OR (XOR) of user data (sector) 0, user data (sector) 1 and user data (sector) 2 is taken to have the virtual user data, thereby giving rise to a correlation of the sectors 0 to 2, and its virtual user data is appended with C2 having a greater error correction capability than C1, whereby an error uncorrectable with C1 is correctable with C2.
摘要:
The backlight device is configured in a planar geometry by the combination of a plurality of light emitting units. The light guide plate of the light emitting unit has a light guide unit that guides light from the light source and a light emission surface that emits light from the light guide unit. Adjacent light emitting units are arranged to cross to each other and the light emission surface of a light emitting unit overlaps with the light guide unit of another light emitting unit such that the light guide unit of each light guide plate of the light emitting unit does not extend outside the light emission region of the backlight device.
摘要:
When a communication between a camera and a television is performed utilizing a first wireless communication mode which employs high-directional radio transmission, and a second wireless communication mode which employs low-directional radio transmission with lower directivity than that of high-directional radio transmission, the television detects that the communication in the first wireless communication mode has been disconnected and notifies the camera. The camera determines whether or not the movement of the camera is the cause of disconnection in the first wireless communication mode. If the reason for disconnection is the movement of the camera, a control signal is transmitted to the television so as not to execute the process for an avoiding no-signal condition.