摘要:
A system and method for analyzing the errors inherent in the manufacture and recording of media and utilizing those errors as a signature for the specific media copy. Manufactured media, in this case CD's and similar type digitally encoded media, contain errors that are truly random in nature. Randomness is reflected in the spatial distribution of the E11 and E12 errors. These errors arise from a variety of sources and are manifested by experimental observation in non-correlative distribution. The nature of the errors that occur on parallel manufactured optical media can be classified into several categories: Recording errors, Encoding errors, Mastering errors, Molding defects, Materials defects, Contamination defects, Coating defects, Handling defects, Surface contamination, Playback errors, Optical ambiguity, A/D nonlinearity, and CODEC error. These errors all contribute to a unique error signature for each item of media manufactured. Using these unique signatures of errors, the individual identification of each piece of media can be established. Thus a method for the detection of a media copy signature is also established.
摘要:
In an external storage, an I/O process is continued without any intervention of a user or a host system at failure of a controller. When a failure occurs in a controller, a host system 10 recognizes the failure of the controller. Before the failure is notified to the user and application to stop the job, the substitutive controller reads the SCSI-ID possessed by an SCSI port of the failed controller from a shared memory, registers the SCSI-ID of the SCSI port to the SCSI port associated with the substitutive controller, and erases by a port address resetting facility 45 of the substitutive controller the SCSI-ID possessed by an SCSI port of the failed controller. Thanks to the provision, since the SCSI-ID specified at issuance of an I/O request is transferred between the controllers, the user or the host system need not alter the I/O request issuing route. Moreover, while the host system does not recognize the error, the transfer can be conducted.
摘要:
A method for categorizing information regarding a failure in an application program module. The failure may be a crash, a set-up failure or an assert. For a crash, a name of an executable module where the crash occurred in the application program module, a version number of the executable module, a name of a module containing an instruction causing the crash, a version number of the module and an offset into the module with the crashing instruction are determined. This bucket information is then transmitted to a repository for storage in a database. The database may be examined to determine fixes for the bug that caused the crash.
摘要:
A method for adjusting bandwidth allocation in a cable modem termination system is provided. The method includes detecting an overflow condition at a primary transceiver of the cable modem termination system, determining whether a back-up transceiver is available in the cable modem termination system, and when the back-up transceiver is available, establishing at least one channel for the back-up transceiver to communicate over a common physical medium with at least one channel of the primary transceiver to effectively increase the bandwidth of the cable modem termination system.
摘要:
The device described is used to convert a diagnostic interface to standard SPI and includes: an electronic unit (10), having a data input (14), a data output (17), a synchronization input (15), a clock input (16) and a register (13) and a buffer unit (12), having a signal input (19), a signal output (20) and an activation input (21). The data input (14) and the data output (17) of the electronic unit (10) are connected to each other by a first data line (18). The data output (17) for the electronic unit (10) is connected to the signal input (19) on the buffer unit (12) by a second data line (22).
摘要:
The invention relates to a microprocessor-controlled standard field device (3null, 4null, 5null, 6null), such as a measuring sensor or an actuator, for connecting to a field bus system (1) that, in turn, is connected to, for example, a freely programmable controller (2null). According to the invention, the field device (3null, 4null, 5null, 6null) is equipped with a security layer (10) for carrying out a security proven communication. A secure and simultaneously cost-effective communication with a control device (2) via a field bus system (1) is made possible by implementing a security layer (10) in a conventional operationally proven or redundant standard field device (3, 4, 5, 6).
摘要:
A method for quantifying effects of resonance in an integrated circuit's power distribution network is provided. The power distribution network includes a first power supply line and a second power supply line to provide power to the integrated circuit. Test ranges are selected for two test parameters, reference voltage potential of a receiver and data transmission frequency of the integrated circuit. At each combination of the two test parameters, bit patterns are transmitted by the integrated circuit to the receiver. A comparison is made between the transmitted bits and the received bits to determine whether the transmitted bits were correctly received. The comparison may be used to determine and report a range of values for the reference voltage potential and data transmission frequency that allow the transmitted bits to be correctly received.
摘要:
A built-in self-test (BIST) circuit is configured to divide data output bits of a RAM macro into a plurality of groups each consisting of 2 bits, and provide a 1-bit comparator of a signature analyzer for each group to share one 1-bit comparator by respective two data output bits. A selector of a bit changer sequentially selects a data output bit from each group, and the 1-bit comparator sequentially compares output data for the selected data output bit with expected value data.
摘要:
A digital memory circuit has at least two pairs of adjacent memory banks. Each of the banks has n parallel terminals for n read/write data lines. Each bank pair has only two bundles of n/2 read/write data lines. A first bundle is assigned to the first half of a first bank and to a second half of a second bank and the second bundle is assigned to a second half of the first bank and to a first half of the second bank. Data are input/output in parallel to n/2 input/output lines with the timing of successive half-periods of a clock signal. A changeover device is changeable between different switching states for connecting a bundle of n/2 input/output lines to the read/write data lines of the bank pair containing the addressed bank, depending on whether the data are assigned to the first or second half-period of the clock signal.
摘要:
A semiconductor integrated circuit device includes: a first semiconductor chip including a CPU and a debug basic circuit section for verifying operation of a program executed by the CPU; and a second semiconductor chip retained over a principal surface of the first semiconductor chip and including a debug extension circuit section electrically connected to the CPU and the debug basic circuit section. The debug basic circuit section includes a debug command analyzing section for analyzing a command input from outside. The debug extension circuit section formed in the second semiconductor chip includes a debugging function circuit section including at least one debug circuit.