 Method for testing integrated circuits having a grid-based, "cross-check" t e |
| The present invention is a new test structure which allows up to 100 percent electrical testing of V... |
|
| Serial scan chain architecture for a data processing system and method of operation |
| What is claimed is: 1. A data processor having a scan chain architecture, the scan chain ... |
|
| Hierarchically managed boundary-scan testable module and method |
| OF THE DRAWINGS FIG. 1 is a block diagram of electronic system 10 that accommodates JTAG testing ... |
|
| Multiple BIST controllers for testing multiple embedded memory arrays |
| The present invention generally relates to various models representing at least a portion of a ... |
|
| Boundary scan latch configuration for generalized scan designs |
| The present invention relates generally to a boundary design of a chip. More particularly, the ... |
|
| RAM memory circuit having a plurality of banks and an auxiliary device for testing |
| One aspect of the invention is directed to designing a RAM memory circuit provided with a plurality ... |
|
| Apparatus for testing an interconnecting logic fabric |
| According to the present invention, test circuitry and operational methods that are formed within ... |
|
| Radio channel control apparatus used in a CDMA cellular system and capable of changing cell size |
| It is therefore an object of this invention to provide a radio channel control apparatus capable of ... |
|
| Multiple satellite repeater management system using frame error rate for diversity selection |
| The foregoing and other problems are overcome and the objects of the invention are realized by ... |
|
| Adaptive power control in wideband CDMA cellular systems (WCDMA) and methods of operation |
| I claim: 1. A Wide-band Code Division Multiple Access ("WCDMA") system comprising: a base station ... |
|
|
Information recording medium and information record regenerating device therefor
| Details |
Inventors: Hoshino, Takashi;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Edun; Muhammad N.
Assistant Examiner:
Attorney, Agent or Firm: Fay Sharpe Beall Fagan Minnich & McKee
Reliability of data is improved by increasing the length of burst error correction of recorded data. Instead of the conventional error correcting codes produced in a sector, error correcting code interleaved among sectors is generated. Otherwise, double codes are formed by decreasing parity number of the conventional error correcting codes produced in the sector and adding error correcting code interleaved among the sectors instead. The length of burst error correction of recorded data is increased by interleaving error correction code among the sectors. Further, the efficiency of use of disk can be improved since parity sector is not used and, in addition to this, the speed of processing can be improved since there is no need to read out unnecessary sectors during correction. |
|
DETAILED DESCRIPTION An object of the present invention is to provide a recording medium and an error correcting method where the burst error correcting capability and the reliability of recording data can be improved, and the usability of medium can be increased without providing special parity sectors, and the processing speed can be improved without reading out any new sector when correction is required.
In addition to these, the present invention can be applied by recording file unit, and the recording medium can be easily performed on a driving device and can be used not only as a read only disk, but as a write-once disk or a rewritable disk.
In order to attain the above object, according to the present invention, the error correcting code sequences are dispersedly arranged among sectors of information recording blocks.
The regenerating device has a memory means for storing data in a plural dispersed sectors and a correcting means.
As another method, two kinds of the error correcting code sequences are provided, one sequence is dispersedly arranged inside a sector, and the other sequence is arranged among sectors.
The regenerating device has a memory means for storing data in a plural dispersed sectors, a first correcting means for correcting the data dispersedly arranged among sectors and a second correcting means for correcting the data dispersed inside a sector.
Otherwise, the regenerating device has one error correcting means for sequentially correcting the data dispersed inside a sector and the data dispersedly arranged among sectors.
For the data sequence to produce the error correcting codes, one byte of data is used in order of sector 0, sector 1, sector 2, .
.
.
, sector n, sector 0, .
.
.
one by one, and the produced error correcting codes are recorded in the recording medium following to the data.
In the regenerating device, regenerated data from sector 0 to sector n is stored in a memory means, and read out the data and the error correcting codes from the memory means in the same sequence as that at producing the error correcting codes to correct the data in an error correcting means
|
| Related patents |
|
|
Optical disk apparatus having error correction circuit
OF THE INVENTION There will now be described an embodiment of this invention with reference to the accompanying drawings. FIG. 1 shows an optical disk apparatus of this ...
|
|
|
Method and apparatus for distinguishing control channel from traffic channels
It is accordingly an object of the present invention to speed up the process of discriminating between traffic and control channels in a received signal. Another object ...
|
|
|
Method for predicting a fill-up level of a buffer in an ATM network element
Hence, it is an object of the present invention to provide an improved method for predicting a fill-up level of a buffer in an ATM network element, and also to provide ...
|
|
|
DSL modem utilizing low density parity check codes
It is therefore an object of the invention to provide simple methods of generating reproducible H matrices. It is another object of the invention to provide DSL modems ...
|
|
|
Structured document management system, structured document management method, search device and search method
The present invention has been made in view of the above circumstances and provides a structured document management system and a structured document management method ...
|
|
|
High speed read/modify/write memory system and method
One form of the present invention is an improvement for a data processing system. The improvement comprises a memory for storing data elements, a first cache register ...
|
|
|
Methods and apparatus for caching a location index in a data storage system
Aspects of the present invention relate to improved techniques for accessing content in a storage system. In accordance with one embodiment of the present invention, ...
|
|
|
Method and apparatus for correcting data errors
Broadly speaking, the present invention relates to an error correcting method and apparatus which shortens the time needed to perform error correction using a buffer ...
|
|
|
Method and apparatus for enhancing data rate in processing ECC product-coded data arrays in DVD storage subsystems and the like
What is claimed is: 1. A machine-implementable method for enhancing the data transfer rate in an arrangement formed by an ECC processor coupling a first memory, said ...
|
|
|
Data processing method and apparatus, recording medium, reproducing method and apparatus using the same method
OF THE INVENTION Hereinafter, referring to the accompanying drawings, embodiments of the present invention will be explained. In a structure of an error-correcting ...
|
|
|
Fault Detection 
