摘要:
An image transfer apparatus includes a generator, a scrambling device, first and second converters, a descrambling device, a detector, and a retransmission request unit. The generator generates packets each having an error detecting code added to image data. The scrambling device scrambles the generated packets on a packet-to-packet basis to reduce repetition of identical data. The first converter subjects the scrambled packets to parallel-to-serial conversion, and transfers the packets to a target apparatus. The second converter receives the scrambled packets from the target apparatus, and subjects the received packets to serial-to-parallel conversion. The descrambling device descrambles the packets subjected to the serial-to-parallel conversion. The detector detects an error from the error detecting code of each of the descrambled packets. Upon detection of the error, the retransmission request unit requests the target apparatus to retransmit the packet in which the error is detected.
摘要:
A data control device includes: a switch portion that has a plurality of first terminals on an upstream side, a plurality of second terminals on a downstream side, and a circuit portion that optionally switches a connection between the first terminals and the second terminals based on an external switching signal; and at least one control portion that has a first input/output portion on the upstream side and a second input/output portion on the downstream side, wherein the second input/output portion is connected to the first terminal of the switch portion and the first input/output portion is connected to the second terminal of the switch portion, and wherein the at least one control portion controls an input/output of data between the first input/output portion and the second input/output portion.
摘要:
A disk drive which includes a head amplifier having a function of degaussing a magnetic head effective to suppression of an EAW phenomenon is disclosed. The head amplifier includes a degaussing controller which performs switching from write operation to degaussing operation, a write driver which outputs degaussing current necessary for the degaussing operation, and a current control unit which sets a current waveform of the degaussing current.
摘要:
A disk drive using a read/write channel including an iteration decoder for performing iterative decoding processing is disclosed. The iteration decoder has an RLL error detector for detecting a burst error portion from an LLR group output from the channel decoder, and an LLR adjuster. The LLR adjuster makes adjustment by reducing the value of the LLR group corresponding to the detected burst error portion.
摘要:
A data control device includes: a switch portion that has a plurality of first terminals on an upstream side, a plurality of second terminals on a downstream side, and a circuit portion that optionally switches a connection between the first terminals and the second terminals based on an external switching signal; and at least one control portion that has a first input/output portion on the upstream side and a second input/output portion on the downstream side, wherein the second input/output portion is connected to the first terminal of the switch portion and the first input/output portion is connected to the second terminal of the switch portion, and wherein the at least one control portion controls an input/output of data between the first input/output portion and the second input/output portion.
摘要:
There are provided an image processing apparatus and an image processing method which are capable of correctly determining the scaling factor of an input image containing a specific image composed of a predetermined number of partial images. When an input image is inputted, the partial image detection unit 1 detects information about partial images. As information about partial images, information indicating whether partial images exist, the size of the partial images, and the like are outputted. The information about partial images is outputted for each pixel of an input image and a pattern composed of the information about partial images is obtained. The scaling factor estimation unit 2 uses a pattern composed of the information about partial images outputted from the partial image detection unit 1 to detect an area where a predetermined number of partial images exist, and determines the scaling factor of the input image from information of the area.
摘要:
A data transfer apparatus includes a transmitting unit, a transmission controlling unit, and a generating unit. The transmitting unit transmits transmit data over a transmission channel having a plurality of lines, such that the transmit data are assigned to the plurality of lines by information unit of the transmit data, the information unit. The transmission controlling unit appends control data to transfer data to be transferred to a receiving side to compose the transmit data, the control data being for controlling transmission and reception of the transfer data. The generating unit obtains information about the number of the lines. The generating unit determines, based on the number of the lines and the number of information units of the control data, the number of information units of the transfer data that makes the number of information units of the transmit data integral multiple of the number of the lines.
摘要:
A data transmission apparatus includes a packet generation section, a frame encoding section, a transmission section, a reception section, a frame decoding section and a packet extraction section. The packet generation section generates a packet upon request. The frame encoding section generates a frame having a predetermined length by dividing the packet or adding dummy data to the packet and generates an error-correcting-code-added frame by adding an error correcting code to the frame. The transmission section transmits the generated error-correcting-code-added frame through a transmission line. The reception section receives the error-correcting-code-added frame. The frame decoding section performs an error detection and an error correction for the error-correcting-code-added frame. The packet extraction section extracts the packet by removing the error correcting code from the error-correcting-code-added frame for which the error detection and the error correction have been performed.
摘要:
A storage system includes: a plurality of data input and output parts through; a data storing part that stores the data inputted and outputted through the plurality of data input and output parts; a range information storing part that stores range information; first control part controlling the data storing part to read and write the data in accordance with the stored range information, and that rewrites the stored range information to predetermined range information in a case where a prescribed signal is inputted from the data input and output part; and a plurality of second control parts that are provided correspondingly to the plurality of data input and output parts to input and output the data, and that input the prescribed signal to the data input and output parts in a prescribed case.
摘要:
A partial response (PR) waveform generator generates a digital value sequence of an expected PR waveform based on the output of a soft-decision Viterbi detector included in, for example, a first-stage decoder unit incorporated in an iterative decoder. The generator also generates flag information indicative of whether reliability of the digital value sequence is low or high, in parallel with the generation of the digital value sequence. An error detector detects error values in a PR equalized sample value sequence, needed for feedback control of a control target, using the digital value sequence of the expected PR waveform as a digital value sequence of a reference waveform. An error output controller controls the output of the error values detected by the error detector in accordance with the state of the flag information generated by the generator.