Abstract: Provided is a radio communication device which can reduce ISI caused by destruction of an orthogonal DFT matrix even when an SC-FDMA signal is divided into a plurality of clusters and the clusters are respectively mapped to discontinuous frequency bands. The radio communication device includes a DFT unit (110), a division unit (111), and a mapping unit (112). The DFT unit (110) uses the DFT matrix to execute a DFT process on a symbol sequence in a time region to generate a signal (SC-FDMA signal) of the frequency region. The division unit (111) generates a plurality of clusters by dividing the SC-FDMA signal with a partially orthogonal bandwidth corresponding to the vector length of some of the column vectors constituting the DFT matrix used in the DFT unit (110) and orthogonally intersecting at least partially. The mapping unit (112) maps the clusters to discontinuous frequency bands.

Abstract: A device determines a high watermark threshold for a subrate service, compares a traffic demand to the high watermark threshold, and adds a temporary bandwidth to an original bandwidth available to the subrate service if the traffic demand is greater than or equal to the high watermark threshold.

Abstract: The present invention improves the performance of video on demand (VOD) in a digital cable system. A statistical remultiplexer (stat mux) acquires metadata that statistically describes the bandwidth characteristics of each VOD channel. When the metadata indicates that the VOD channel will require more bandwidth than is available, the stat mux can re-encode or re-compress other streams or the VOD stream streams to meet the bandwidth limitation. The metadata is generated off-line and streamed out ahead of the VOD program content. The stat mux includes a minimal length buffer for storing VOD program content that when combined with the metadata enables a viewer to randomly access VOD program content without noticeable latency. When a VOD function request is received from the viewer, the previously supplied metadata is used to allocate bandwidth rather than waiting for a look-ahead buffer to acquire a sufficient amount of future VOD program content.

Abstract: Conventional analog front ends or AFEs for scanners are implemented using multiple integrated circuits or ICs. As a result, there is typically a problem of skew (due at least in part to manufacturing process variations) for these different ICs in the AFE. Here, an AFE is provided which serializes input data so as to compensate for skew.

Abstract: A method for receiving a broadcasting signal and a broadcasting signal receiver are disclosed. Even when a cell is changed while an emergency alert is output, the emergency alert can be continuously output using emergency alert table information included in the broadcasting signal and channel information of the cell. The emergency alert table information may include a cell identifier and the channel information of the cell may include virtual channel information of the cell.

Abstract: The disclosed method of processing a digital broadcast signal comprises generating one RS frame or two RS frames for a data group, forming the data group being divided to 5 data regions, wherein the 5 data regions include a first data region which is located at central of the data group, a second data region which is concentric about the first data region, a third data region which is concentric about the first and second data region, a fourth data region which is concentric about the first, second and third data region and a fifth data region which includes scalable amount of the mobile service data, wherein the fifth data region includes 5 extended data blocks, and wherein data in one of the 5 extended data blocks are merged into the data blocks of the first data region when the one RS frame is generated for the data group.

Abstract: A method for receiving a broadcasting signal and a broadcasting signal receiver are disclosed. Even when a cell is changed while an emergency alert is output, the emergency alert can be continuously output using emergency alert table information included in the broadcasting signal and channel information of the cell. The emergency alert table information may include a cell identifier and the channel information of the cell may include virtual channel information of the cell.

Abstract: Methods, computer program products, electronic devices and information blocks are provided that improve both efficiency of transmission and efficiency of segmentation by enabling an intelligent transport block size determination and a flexible segmentation scheme suitable for utilization with retransmission. One exemplary method involves steps of: determining a size of a transport block based on criteria including a size of at least one data block to be transmitted, wherein the transport block size is determined such that the transport block will include at least one segment of a data block of the at least one data block; segmenting the data block of the at least one data block into a plurality of segments including the at least one segment; and populating the transport block with at least the at least one segment.

Abstract: A method for receiving a broadcasting signal and a broadcasting signal receiver are disclosed. Even when a cell is changed while an emergency alert is output, the emergency alert can be continuously output using emergency alert table information included in the broadcasting signal and channel information of the cell. The emergency alert table information may include a cell identifier and the channel information of the cell may include virtual channel information of the cell.

Abstract: A method for multicasting audio data in a power line communication network consistent with certain embodiments involves assigning a set of one or more time slots and one or more sub-carriers for each recipient audio client designated to receive the multicast audio data over a power line serving as a communication medium. A list of recipient audio clients is built for receipt of the multicast audio data over the power line communication network. Audio data are buffered in a buffer, the data being for receipt during a transmission cycle to the recipient audio clients on the list. Data are read from the buffer, and the data are transmitted over the power line communication network to each recipient on the recipient audio client on the list using a time slot and sub-carrier set assigned to each recipient during the transmission cycle. This abstract should not be considered limiting, since other embodiments may incorporate more, fewer or different elements that those described in this abstract.

Abstract: A hardware emulation system is disclosed which reduces hardware cost by time multiplexing multiple design signals onto physical logic chip pins and printed circuit board. The hardware emulation system comprises a plurality of reprogrammable logic devices, and a plurality of reprogrammable interconnect devices. The logic devices and interconnect devices are interconnected together such that multiple design signals share common I/O pins and circuit board traces through the use of multiplexing.

Abstract: The present application discloses a signal processing apparatus. Particularly, it discloses a signal processing apparatus comprising a first decoder for generating video data by decoding data and a second decoder for generating video data by decoding data, wherein, regarding predetermined operations for generating the video data by decoding the data, the number of the predetermined operations that can be executed by the second decoder for each unit time is lower than that of the predetermined operations that can be executed by the first decoder for each unit time.

Abstract: An organic light emitting display capable of reducing the manufacturing cost and displaying images with uniform brightness. The organic light emitting display includes: a data driver for supplying a plurality of data signals to a plurality of first data lines, respectively; an image display portion having a plurality of second data lines, a plurality of scan lines, and a plurality of pixels; and a demultiplexer having a plurality of data transistors arranged in the respective first data lines to supply the plurality of data signals supplied to the first data lines to the plurality of second data lines, and a plurality of capacitors connected between respective gate terminals of the plurality of data transistors and the second data lines.

Abstract: A computer networking system, method and device for multiplexing HTTP requests and demultiplexing HTTP responses. The method may include receiving HTTP requests from a plurality of clients and routing those requests to a socket on a server system. The method may also include receiving HTTP responses from the server system and selectively routing those responses to the corresponding clients.

Abstract: The present invention, a multiprocessor chip pervasive command interface, collects different types of pervasive commands into individual queues for each command type. As permitted by various grouping rules, valid commands are grouped together into one single command and placed on a functional interchip communications bus. This grouping of commands maximizes pervasive command bandwidth while the use of the functional bus minimizes the number of interchip connections.

Abstract: A connection is provided between logical macros to allow prioritization of operations in accordance with an arbitration scheme that distinguishes between operations based on such factors as priority or size of transaction. The invention allows connection of logical macros and prioritizes the appropriate operation for the resources available to optimize data throughput to optimize the utilization of multiple buses. A first arbiter manages data transmissions over a first communication bus. Arriving short or high-priority messages are transmitted over a second communication bus managed by a second arbiter, but only if the target logical macro is not the same as currently targeted by the first arbiter.

Abstract: The present invention provides a multiplexed payload system for processing data organized in any interleaved framing structure, preferably SONET. Along a receive path, the system consists of an input shift register, an input multi-stream merge network, a time-sliced processing unit, and a context memory. Similarly, along a transmit path, the system consists of an output shift register, an output multi-stream merge network, a time-sliced processing unit, and a context memory. The transmit path functions in an identical manner to the receive path but in the reverse direction. The multi-stream merge network, in either direction, converts between spatially separated input data streams of various configurable widths and time-division-multiplexed streams of constant width.

Abstract: An application specific integrated circuit (ASIC) employs various logic blocks. The blocks may include logic circuits that operate at different clock rates. Consequently, an interface logic block may be needed to efficiently transfer signals from one frequency clock domain to another. One such interface, known as a universal asynchronous boundary module (UABM) is situated between the two domains allowing communication between the logic circuits.

Abstract: The present invention relates to analogue selectors, also known as analogue multiplexers, for audio equipment input source selection. The present invention provides an analogue input selector for selecting one of a number of analogue source devices. The selector comprises a plurality of input connections for coupling to the input sources, each said input connection being connected to a gain controller having at least zero and one or more non-zero gains, said input connection not including a semiconductor switch. Preferably the gain controllers are implemented using MOSFETs which are held at a voltage which is independent of the signal voltage.

Abstract: An apparatus and method for extending a bus to support at least one auxiliary function. A filter may intercept and route a signal issued over the bus. The filter may comprise control logic for reading the intercepted signal and for determining a destination therefor. The filter may also comprise a multiplexer operatively associated with the control logic for reissuing the intercepted signal to the destination. When the intercepted signal is designated as function-specific, the multiplexer reissues the intercepted signal to one of the at least one auxiliary function. When the intercepted signal is designated as device-specific, the multiplexer reissues the intercepted signal over the bus to a peripheral device.

Abstract: A method and device for transmitting signals of a first category and signals of a second category over a link, said link providing a predetermined signal transmission rate, where said signals of the first category have a discontinuous characteristic comprising periods of activity and periods of inactivity, where a first channel is provided for carrying signals of the first category and a second channel is provided for carrying signals of the second category, and where the two channels each have respective proportions of the predetermined signal transmission rate of the link during periods of activity of the signals of the first category, and the proportion of the signal transmission rate assigned to the second channel during periods of inactivity of the signals of the first category is increased with respect to the period of activity.

Abstract: A synchronization device for a synchronous digital message transmission system producing a synchronous output signal including successive transport modules synchronized to a frame clock from a digital input signal. The synchronization device includes a receiver unit for receiving the input signal, a packet assembly device for packaging the input signal into subassemblies of the transport modules, a buffer memory, a writer for writing data bits of the input signal out of the subassemblies into the buffer memory with a write clock, a reader, for reading data bits out of the buffer memory with a read clock in order to form the output signal, and a sending unit (SO) for sending synchronous output signals. The effective bit rate of the subassemblies compared to the standardized value is either lowered or raised by selecting the write clock lower than the read clock.

Abstract: The present invention provides a transceiver which does not lose synchronization upon a transition from a non-precoded communication mode to a precoded communication mode and minimizes phase drift. A transceiver unit outputs a signal representing the phase of a received signal, and that possesses a controllable sampling rate. The transceiver is coupled to a phase reference selector and a timing control system. Upon a transition between communication modes, an adaptation period is initiated. The phase reference selector captures the phase estimate immediately prior to termination of the adaptation period, outputting a predetermined phase reference until such termination, at which point the stored phase estimate is outputted. The timing control system minimizes the difference between the phase estimate and the output of the phase reference selector by altering the sampling rate, except during the adaptation period, during which the sampling rate is held constant.

Abstract: In a digital telecommunications system having data packages carrying identification data, the identification data is characterized in that it is unique to the package within a station and does not depend on the identity of the originating station.

Abstract: The method and system provide for transporting a secondary communication signal from a secondary carrier network with a primary communication signal from a primary carrier network. The method and system load the overhead from the secondary communication signal into unused bytes of the primary communication signal, thereby creating a transport overhead. The payload from each of the secondary communication signal and the primary communication signal are combined, thereby creating a transport payload. The transport payload is combined with the transport overhead to form a transport communication signal. The transport communication signal is sent to a destination where the transport communication signal is disassembled. The secondary communication signal's overhead and payload are removed from the transport communication signal and transmitted in a secondary communication signal to the secondary carrier network.

Abstract: Techniques and architecture as well as channel multiplexing schemes to design and implement multi-megabit and gigabit transfer of data in situations requiring or optimized by wireless communication systems are presented as a method by which the high-speed signal integrity of a transmission may be maintained over a hostile wireless link and by which a high-speed transmission may be made while maintaining a bit-rate below the delay spread value such that the unforgiving propagation conditions normally associated with high-speed transfer are mitigated. The system is adaptable to any use where a multi-megabit and gigabit wireless link is desirable; for example in office buildings lacking fiber infrastructure, in rapid deployment situations such as those required in military or emergency situations, or where other separate broadband infrastructures do not exist to the end users for integrated telephone, Internet, and digital data systems.

Abstract: The invention provides method and apparatus for identifying signals for a set of communication devices in a signal stream having signals for a number of different sets of communication devices. Some embodiments of the invention are methods and devices for extracting signals for a first set of communication devices from a signal stream having signals for a number of different sets of communication devices. Other embodiments of the invention are methods and devices for inserting into a signal stream signals from a first set of communication devices. Yet other embodiments of the invention are time division multiplexing and demultiplexing methods and apparatuses that use a content addressable memory to identify sets of signals for a particular set of communication devices. In addition, some embodiment of the invention are used in fiber optic telecommunication networks. These embodiments include an optical network unit that receives an integrated signal stream having signals for different types of applications.

Abstract: A system for converting digital television signals encoded according to an MPEG standard into standardized analog video signals. The system includes means for generating graphic images and for inserting corresponding image signals in a decoded digital flow of main image signals, a digital decoding unit, and an analog coding unit. The digital decoding unit includes means for providing a flow of multiplexed image signals including a first flow of main image signals and of a second flow of image signals that contains, in addition to the main image signals, possible graphic image signals. The analog coding unit includes a demultiplexer of the flow of multiplexed image signals and two encoders. The two encoders respectively receive the first and second flows, and each respectively provide a digital flow of images encoded according to a color television standard to digital-to-analog converters respectively associated therewith, the digital-to-analog converters providing the standardized analog video signals.

Abstract: In a digital telecommunication system having data packages carrying identification data, the identification data is characterized in that it is unique to the package within a station and does not depend on the identity of the originating station.

Abstract: A multi-rate transmission system (10) includes a receive section (12) and a transmit section (14). The receive section includes a receiver (16), a clock recovery unit (18), and a serial to parallel converter (20) all operating at a first clock rate (M). The receiver (16) also has a frame recovery unit (22) that operates at any of a plurality of clock rates, including the first clock rate (M) and a second clock rate (M/n). When the frame recovery unit operates at the first clock rate (M), frame information received by the receiver section (12) has unique bits occupying each bit position associated with each clock pulse of the first clock rate (M). When the frame recovery unit (22) operates at the second clock rate (M/n), each unique bit of the frame information occupies a number of bit positions according to a ratio of the first clock rate (M) to the second clock rate (M/n). Similar operation occurs with respect to a frame formatter (30) in the transmit section (14) of the multi-rate transmission system (10).

Abstract: A communication system comprises a master station 21 and a plurality of slave stations 22-1 to 22-N each of which communicates with the master station through a radio channel carrying a communication signal by using time division multiple access. The slave stations are similar in structure to one another. The master station is similar in structure to each of slave stations. Each of the slave stations selectively transmits a speech signal and an image signal to the master station. On transmitting the speech signal, the speech signal is converted into an ADPCM signal. On transmitting the image signal, the image signal is converted into a PCM signal. The master station receives the communication signal which is transmitted from each of the slave stations. The master station detects whether or not the communication signal is representative of the ADPCM signal to selectively produce the speech signal and the image signal.

Abstract: A data multiplexing network is described which multiplexes a plurality of asynchronous data channels with an asynchronous data stream representing compressed voice signals and/or facsimile signals onto a single synchronous data packet stream. The single synchronous data packet stream is then transmitted by a high speed statistical multiplexer over a composite link to a second site using a modified high-level synchronous data link control protocol with an overlay of an advanced priority statistical multiplexing algorithm. The asynchronous data channels and the compressed voice channel and/or facsimile signals are demultiplexed and reconstructed for sending to other asynchronous computer terminals and to a standard telephone or facsimile analog port at the second site, respectively. PBX trunk interfaces are also provided to allow PBXs to share the composite link between sites. Communication between the first site by voice or facsimile and the second site is transparent to the users.

Abstract: Methods and apparatus for inserting data into an encoded data stream are disclosed. In accordance with the disclosed methods data is inserted into an encoded data stream while maintaining MPEG-2 compliance. The disclosed methods achieve data reduction required to make room for the data to be added by removing certain data elements of an encoded data stream, such as high frequency discrete cosine transform coefficients, which can be removed with minimal impact on picture quality and without disturbing the data stream's compliance with MPEG 2. In a first embodiment, data reduction to make room for the data to be inserted is performed by depacketizing the encoded data, performing a data reduction operation thereon, and then re-packetizing the encoded data. The reduced rate data stream is then multiplexed with the data to be inserted. In a second embodiment data reduction is performed by combining the contents of two or more consecutive transport data packets, e.g.

Abstract: A high speed teleconferencing apparatus and method, the apparatus including interface means for receiving a first analog signal and outputting a first digital signal, encoding means for encoding and compressing the first digital signal to produce a first compressed encoded signal, multiplexing/demultipexing means for receiving and splitting the first compressed encoded signal into at least two split compressed encoded signals, at least two converting means for receiving a respective one of the at least two split first compressed encoded signals and respectively producing at least two first synchronous signals, and at least two CCIT units for receiving a respective one of the at least tow synchronous signals and respectively outputting at least two high speed first synchronous signals to a high speed data link.