Abstract: A power management scheme for use by subscriber equipment in wireless local area networks (WLAN) takes advantage to two different power management modes recognized by relevant standards. The addition of a media activity sensor and timer to a normal inactivity timer allows a WLAN to receive data in a first mode when activity is continuous and switch to a second, polling, mode when it appears that no more data is available. Using the combination of modes allows starting a download using a receive-only mode and switching to a polling mode when the media activity timer expires. The receive-only mode saves power over a continuous polling mode but changing to the polling mode at the end of a receive cycle saves power associated with the long inactivity timeout period of the continuous receive mode.

Abstract: An interface system includes a first driver module that communicates through a bus with a first peripheral card when the bus is in a first mode. A second driver module communicates through the bus with a second peripheral card when the bus is in a second mode. A bus control module receives a communication notification signal from the second peripheral card when the first peripheral card is communicating with the first driver module. The communication notification signal does not interfere with the communication of the first peripheral card and the first driver module. The bus control module switches the bus between first and second modes in response to the communication notification signal.

Abstract: In the various embodiments, memory controllers, methods and systems are described. A system can include a memory controller configured to, compose a characteristic key from a source address and a destination address for a memory copy; and invoke a memory copy routine, wherein the memory copy routine is identified by a wrap function in an alignment matrix, the wrap function corresponding to the characteristic key.

Abstract: A QC-LDPC decoding system employing a trapping set look-up table is provided. The QC-LDPC decoding system includes an iterative decoder that utilizes a message-passing algorithm to decode a received codeword. If the iterative decoder fails to produce a valid codeword, additional processing is performed to decode the received codeword. The additional processing includes the steps of computing the syndrome pattern of the received codeword, searching the look-up table for a trapping set class that is responsible for the iterative decoder's failure, retrieving from the look-up table a syndrome pattern and an error pattern of a member of the responsible trapping set class, and calculating the error pattern of the received codeword based on its syndrome pattern and the information retrieved from the look-up table. The received codeword is then corrected based on its error pattern.

Abstract: An apparatus for use in image processing is set forth that comprises a pixel processor, context memory, and a context memory controller. The pixel processor is adapted to execute a pixel processing operation on a target pixel using a context of the target pixel. The context memory is adapted to store context values associated with the target pixel. The context memory controller may be adapted to control communication of context values between the pixel processor and the context memory. Further, the context memory controller may be responsive to a context initialization signal or the like provided by the pixel processor to initialize the content of the context memory to a known state, even before the pixel processor has completed its image processing operations and/or immediately after completion of its image processing operations. In one embodiment, the pixel processor executes a JBIG coding operation on the target pixel.

Abstract: A system and method of media defect compensation incorporate an architecture capable of modifying a signal representative of data reproduced from a recording medium to compensate for defects in the medium. In accordance with one aspect of the invention, a media defect compensator may incorporate one or two data detectors cooperating with a defect detector to compensate for signal loss due to media defects.

Abstract: In iterative decoding, a data recovery scheme corrects for corrupted or defective data by incorporating results from a previous decoding iteration. In one embodiment, a final multiplexer selects between the final detector output or a previous detector output based on the absence or presence of defective data. In another embodiment, the branch metrics for the defective data, which otherwise would be combined with a priori LLRs from an outer decoder of a prior stage, are ignored so that the a priori LLRs themselves are used alone. The two embodiments can be used together.

Abstract: Systems and techniques associated with signal processing are described. A described technique includes generating asymmetry vectors that model asymmetry in a received analog signal, including an effect of asymmetry spreading in a read channel and selecting at least two different indicators of asymmetry based on the asymmetry vectors. The technique can include using the selected indicators of asymmetry to compensate for one or more asymmetries associated with the analog signal.

Abstract: A method and apparatus is described for reducing RRO in storage systems. A disc may be partitioned into a number of equally spaced sectors. An RRO profile may be individually obtained for each sector, a runout control algorithm may be applied to each sector to generate an RROC waveform for the sector to suppress the RRO, and sector RROC waveforms may be assembled into an RROC waveform for a whole revolution and saved in a memory buffer for feed-forward control. The RROC is performed in the time domain, and it may be adapted for each sector to reject the RRO disturbance.

Abstract: An apparatus and method are disclosed for use in a device, such as a handheld printer or scanner, having functionality that requires information of its position relative to an origin and initial orientation. The module includes two sensors to generate movement data indicative of movement direction and orientation changes of the device. The location and orientation of the device relative to the origin and initial orientation is derived based on the movement data. A handheld printer or scanner implementing the device may thus be moved in different directions across a media to print or scan images, text, or other objects.

Abstract: Systems are provided for searching for a codeword from a plurality of codewords in a codebook for use in precoding, for example, as used in a multiple-input multiple-output (MIMO) transmission system. Dimension reduction techniques may be utilized to reduce the complexity and enhance the efficiency of the codebooks search. Null-spaces of an optimal codeword and codewords in a codebook may be computed. Distance values may be computed based on the null=spaces of the codewords. A codeword may be selected from the codebook based on a minimum distance value from the optimal codeword.

Abstract: Communication between a base station and remote stations is partitioned into frames, each including a first frequency reuse zone having a number of slots. Slots are allocated by assigning a first data rate to each remote station for communication using the first frequency reuse zone. Each remote station is assigned a respective slot allocation comprising a first number of slots of the first frequency reuse zone and has a weighted data rate dependent on the first data rate and the respective slot allocation. The slot allocations are determined so as to maximize the minimum of the weighted data rates of the remote stations. Slots may be allocated using a data rate assigner to assign a first data rate to each remote station for communication using slots of the first frequency reuse zone, and using a slot allocation provider to provide a respective slot allocation for each remote station.

Abstract: A device includes a first memory with first and second memory segments. The first memory segment stores a full image file. A second memory segment stores a partial image file, which is a smaller file and has fewer features than the full image file. A second memory stores a boot program. A control module detects an error in the full image file and executes the boot program using the partial image file.

Abstract: Memory cells and arrays have reduced bit line resistance. An element conductor is disposed on the top of the bit line to reduce the resistance of the bit line while maintaining a shallow bit line junction so that 200 Ohm/square or lower sheet resistances are achieved with the bit line junctions typically 20 nanometers or shallower while the doping levels in the junctions are below about 5×1019 atoms/cm3.

Abstract: The present invention provides a method and system for performing in-line error correction in a disk storage system. The system includes an error correction (ECC) module; and a first memory storage device, wherein the first memory storage device and the error correction module simultaneously receive data from a storage disk before being buffered for transfer to a host system. The ECC module provides error correction mask before any data is transferred from the first memory storage device to a second memory buffer.

Abstract: Methods and systems for scaling an input image are provided. A pixel neighborhood that includes a plurality of pixels neighboring a pixel is selected. At least part of the pixel neighborhood is compared directly to a predetermined pattern in order to determine whether the predetermined pattern is present in the pixel neighborhood. A controller applies a predetermined scaling algorithm to at least a portion of the pixel neighborhood in order to obtain a scaled image if the predetermined pattern is present in the pixel neighborhood.

Abstract: A device includes a first transmit circuit to transmit first data, a first receive circuit to receive second data and an adaptive access control circuit to calculate a transmit delay interval based on a first amount of the first data transmitted by the transmit circuit during a predetermined monitoring interval and a second amount of the second data received by the receive circuit during the predetermined monitoring interval. The first transmit circuit transmits third data based on the transmit delay interval.

Abstract: Methods and apparatuses that facilitate the alignment of multiple color planes of a latent image in a multi-beam multi-pass printer are described herein. The novel methods includes determining, during a first pass of a transfer medium of a multi-beam printer, a first time interval between when at least one light beam from a multi-beam device is detected and when a top of a page is detected at a selected location of the transfer medium, the multi-beam device including a plurality of light beam sources, and the first pass to form a first color plane of a latent image on the transfer medium. The methods further include selecting, based at least in part on the determined first time interval, a first one of the plurality of light beam sources to begin illuminating the transfer medium to create the first color plane on the transfer medium during the first pass of the transfer medium.

Abstract: Semi-volatile NAND flash memory systems, apparatuses, and methods for use are described herein. According to various embodiments, a semi-volatile NAND flash memory may be partitioned into various retention regions. Other embodiments may be described and claimed.

Abstract: Imaging devices incorporating semi-volatile memory are described herein. According to various embodiments, a communication interface may receive image data that is stored in a semi-volatile NAND flash memory device divided into three regions. Other embodiments may be described and claimed.