Abstract: A method for communication includes receiving a composite signal, which carries data at a first data rate and includes multiple sub-signals that are interleaved in a time domain and are separated by boundary indicators. The received composite signal is demultiplexed into the sub-signals by automatically detecting the boundary indicators between the sub-signals in the composite signal. The sub-signals are demodulated using multiple respective demodulators operating at second data rates that are lower than the first data rate so as to generate respective output data streams. The output data streams are combined so as to reconstruct the data at the first data rate.

Abstract: There is provided a method of supporting an interworking between a wireless local area network (WLAN) and a mobile communications network. The interworking is facilitated by an interworking function (IWF) disposed on a WLAN side of the interworking. The method comprises the step of connecting the WLAN to the mobile communications network by employing the IWF as an auxiliary radio network controller for the mobile communications network, in particular, a drift radio network controller (DRNC) in a UMTS network.

Abstract: A digital VSB transmission system and enhanced data multiplexing method are disclosed. When ½ enhanced data coded at a rate of ½ and ¼ enhanced data at a rate of ¼ are transmitted, timing jitter in MPEG of VSB receiver can be reduced and the size of input buffer in MPEG decoder of the VSB receiver can be reduced by multiplexing the ½ enhanced data packet and the ¼ data packet at predetermined intervals. Multiplexing the ½ enhanced data packet and the ¼ data packet by grouping increases the reception performance of the ¼ enhanced data. Multiplexing the ½ enhanced data packet and the ¼ data packet alternatively reduces the MPEG timing jitter in the VSB receiver and increases the reception performance of the ¼ enhanced data.

Abstract: There is provided a transceiving method of an audio signal using an UWB wireless communication scheme, including the steps of: extracting and analyzing the beacon frames to generate reserved transmission interval information previously reserved by the other UWB transmitters and/or adjacent wireless audio transmitters and information on audio source and channel; calculating an available transmission interval for each channel of audio sources by using the information on the audio source and channel of the other UWB transmitters; generating and transmitting a beacon frame based on the reserved transmission interval and the audio source and channel information; transmitting the audio signal at the reserved transmission interval by audio source and channel units; extracting and analyzing the beacon frame to generate audio source and channel information and reserved transmission interval information; and providing the audio source and channel information to the user.

Abstract: Systems and methods for combining a plurality of transport streams into a single transport stream for transmission to, e.g., a single frequency network via a satellite. Embodiments provide receiving a plurality of original, e.g., MPEG-compliant, data streams, where each original data stream has its own timing information, combining the plurality of original data streams into a single combined data stream which is also, e.g., MPEG compliant, modulating the single combined data stream for uplink to a satellite, receiving a downlink transmission from the satellite, where the downlink transmission includes the single combined data stream, de-combining the single combined data stream into the plurality of original data streams, and passing respective original data steams to, e.g., one or more DVB-T modulators for broadcast into a single frequency network.

Abstract: A pair of main-view and sub-view video streams and a graphics stream are recorded on a BD-ROM disc. Metadata is provided in each GOP in the sub-view video stream. The metadata includes offset information. The offset information specifies offset control for a plurality of pictures constituting a GOP. Offset control is to provide a left offset and right offset for the horizontal coordinates in a graphics plane to generate a pair of graphics planes, and to combine them separately with main-view and sub-view video planes. The sub-view video stream is packetized and multiplexed in a transport stream. A header of each TS packet includes a TS priority flag. TS packets containing the metadata have a different value of TS priority flag from TS packets containing sub-view pictures.

Abstract: A pulse transmission method for transmitting data by using pulse signals, each having a predetermined pulse width; defining a symbol time at least N times the predetermined pulse width, N being at least 2; defining a basic delay time calculated by dividing the predetermined pulse width by a predetermined integer; placing the pulse signals in the symbol time by delaying the pulse signals by an integral multiple of the basic delay time from start of the symbol time, the number of the pulse signals being k and 0?k?N being satisfied; and transmitting the pulse signals.

Abstract: The invention provides for a system, method, and device for using the existing copper loop plant of twisted pair wiring for data communication by using a plurality of pairs in a cable bundle of twisted pair for the downstream data direction simultaneously, as if the plurality of twisted pair in the cable bundle were a broadcast medium. Between an individual subscriber's access pair and the cable bundle, an aggregation device is used to combine all received signals from the plurality of twisted pairs in the cable bundle and to make the entire downstream bandwidth of the plurality of pairs available to the subscriber.

Abstract: Method and system for generating and processing multiple independent input data streams based on a high priority OS message framework such as an OS provided framework for processing mouse-messages. Multiple input devices generate motion that is sensed by motion sensors located on one or more motion sources, quantify the sensed motion, and provide resulting input data to a computer via one or more communication ports. One or more software subroutines process the provided data, separating them into multiple independent input streams according to their sources, and sending the streams to listening applications. The subroutines are preferably integrated at a low level of the OS architecture, thereby enabling low-latency, fully-functional high priority processing of the input data.

Abstract: A programmable frequency receiver includes a slicer for receiving data at a first frequency, a de-multiplexer for de-multiplexing the data at a second frequency, a programmable clock generator for generating a clock at the first frequency, and first and second resonant clock amplifiers for amplifying clock signals at the first and second frequencies. The resonant clock amplifiers include an inductor having a low Q value, allowing them to amplify clock signals over the programmable frequency range of the receiver. The second resonant clock amplifier includes digitally tunable delay elements to delay and center the amplified clock signal of the second frequency in the data window at the interface between the slicer and the de-multiplexer. The delay elements can be capacitors. A calibration circuit adjusts capacitive elements within a master clock generator to generate a master clock at the first frequency.

Abstract: According to an embodiment, there is a method of displaying digital broadcasting using a digital device, the method comprising: storing, in the digital device, a plurality of television program listings, each of the television program listing including a title, telecast time information and channel information; displaying the plurality of television program listings on a screen of the digital device; and if a program from the displayed television program listings is selected, displaying detailed information of the selected program on the screen, wherein the selected program has a plurality of data broadcasting programs related to the selected program, and wherein the detailed information includes information of the selected program and/or information of at least one of the data broadcasting programs related to the selected program.

Abstract: A multiplexing system (10) is provided which includes a plurality of encoders (12-15) which generates elementary streams, respectively, CPU (16), multiplexer (17), instruction memory (18), and a data memory (19) which stores a plurality of elementary data to be multiplexed. Each of the encoders (12-15) divides elementary data into units, and stores the data into the data memory (19). The CPU (16) generates, for each of the data units, instruction data having stated therein a storage location in the data memory (19) and stores the instruction data into the instruction memory (18). The multiplexer (17) reads the instruction data one by one from the instruction memory (18), and reads data units stated in the instruction data sequentially from the data memory (19), for generation of a multiplexed stream. Thus, the burden of processing to the controller can be lessened.

Abstract: A remote unit consisting of an enclosure, equipment providing network access, connections to a limited amount of subscribers and a central office which also provides exterior connectivity. Users and information sources in the vicinity of the remote unit can use a wired or wireless interface to the remote unit for content delivery to a central location.

Abstract: A multiplexed input/output (I/O) system detects leakage currents on a selected input channel. The system includes a leakage detection multiplexer connected to provide an output selected from one of a plurality of input channels. In addition, the leakage detection multiplexer provides as part of the output measured leakage currents associated with the selected input channel. Based on the detected leakage currents, a determination can made regarding whether the detected leakage currents have compromised the integrity of the multiplexer output. In addition, the detected leakage current can be used to compensate the output provided by the multiplexer to account for the presence of leakage currents on the selected channel.

Abstract: A sliceable router includes a forwarding engine; a routing engine coupled to the forwarding engine; multiple virtual packet interfaces coupled to the forwarding engine, wherein the interfaces shares an optical orthogonal frequency-division multiple accesses (OFDMA)-based programmable transceiver for interface virtualization; and one or more physical packet interfaces coupled to the forwarding engine.

Abstract: Dynamic resource allocation systems, apparatus, and methods are disclosed for selectively improving the ability of a receiver to determine a channel estimate in an Orthogonal Frequency Division Multiple Access (OFDMA) system. A wireless communication system can use a common pilot channel configuration to aid channel estimation in one or more receivers in communication with the system. A receiver in communication with the system may be unable to demodulate received data due to an inaccurate channel estimate. The receiver can communicate to a transmitter in the system a request for additional channel estimation resources. The wireless communication system can provide additional channel estimation resources by inserting dedicated pilot channels into one or more of the frequencies allocated to symbols for the receiver. If the receiver is still unable to demodulate received data, the wireless communication system can incrementally insert additional pilot channels in the symbol associated with the receiver.

Abstract: A clock synchronization buffer for a counter clock flow pipelined circuit including a cascade of processing modules that receive data from a previous module and provide output results to a following module. The clock synchronization buffer receives a clock input signal and provides clock signals to a local processing module and to the next pipeline stage. The clock synchronization buffer includes a selectable delay stage that receives a clock input signal and a delay select signal and outputs a clock signal having a selected delay. An amplifier connected to the selectable delay stage provides the delayed clock signal to a local processing module that corresponds to the clock synchronization buffer circuit. An inverting amplifier connected to the selectable delay stage provides the delayed clock signal to the next pipeline stage. A clock synchronization controller synchronizes the phases of reference clock input and synchronized clock input signals.

Abstract: To provide an AV data recording and reproducing apparatus capable of easily carrying out real-time recording and reproducing via a 1394 interface, and method thereof. Input time information relating to one or a plurality of transport packets are stored in the different transport packet; the transport packets and the different transport packet having input time information relating to the transport packets are recorded; and at the same time the transport packet recorded in the recording medium and the different transport packet are read; the different transport packet corresponding to one of a plurality of the recorded transport packets are extracted and the input time is specified; and based on the input time information, the corresponding transport packet is output.

Abstract: Method and apparatus for providing broadcast overhead information interleaved with a broadcast session in a transmission on a broadcast channel of a wireless communication system. In one embodiment, the information is stored at the receiver to provide quick updating when a user changes to an alternate broadcast channel. In one embodiment, the content server provides an identifier SDP_ID to distinguish among sets of protocol options description sets.

Abstract: A system and method for transitioning to a back-up or engineering signal processing system includes a remote facility having multiplexers and a primary signal processing system generating a first output signal, an IP network, and a plurality of local collection facilities generating a plurality of channel signals through a plurality of receiving circuit modules having respective encoders encoding the plurality of channel signals into a plurality of encoded signals. The plurality of local collection facilities communicating the plurality of encoded signals to the remote facility having a first signal processing system through the network. A first compression system controller is associated with the remote facility storing first configuration data for monitoring and controlling the plurality of receiving circuit modules and the multiplexers. An engineering compression system controller has an engineering signal processing system.

Abstract: A subscriber platform according to various aspects of the present invention, includes an antenna and a receiver coupled to the antenna. The subscriber platform is operated by a subscriber. A method performed by the subscriber platform includes, in any practical order: (a) receiving non-redundant information on several channels, each channel associated with a direction of the antenna and a frequency for receiving information; (b) aggregating the information into a sequence; and (c) displaying a presentation in accordance with the sequence.

Abstract: A first periodic signal generation circuit generates first periodic output signals. A second periodic signal generation circuit generates second periodic output signals. A first multiplexer circuit receives the first and the second periodic output signals. An interface circuit coupled to external pins generates a third periodic output signal based on a periodic signal selected by the first multiplexer circuit. A second multiplexer circuit receives the third periodic output signal at an input. A first periodic feedback signal provided to the first periodic signal generation circuit is based on a signal selected by the second multiplexer circuit. A third multiplexer circuit receives the third periodic output signal at an input. A second periodic feedback signal provided to the second periodic signal generation circuit is based on a signal selected by the third multiplexer circuit.

Abstract: A system and method for processing multiple client flows to a single outbound link is provided. Specifically, a scheduler enforces a maximum symbol rate on the aggregate output flow. Inbound client flows are scheduled for output based upon individual quality of service parameters. For each round of scheduling, packets configured for a first bandwidth range are processed in a first pass and packets configured for a second bandwidth range are processed in a second pass. The packets are placed into frames before transmission. A comparison of the actual symbol usage with the estimated symbol is made and used to determine how to schedule inbound client flows for the second pass of the round.

Abstract: Exemplary embodiments are provided of apparatus and methods relating to antenna multiplexers and demultiplexers are disclosed. In exemplary embodiments, antenna multiplexers include two or more inputs for receiving a corresponding number of signals from multiple antennas. The antennas may include world cell antennas, AM/FM antennas, SDARS antennas, GPS antennas, and/or antennas combining the preceding. Exemplary antenna multiplexers also include an output for simultaneously outputting the combined signals received by the multiplexer. Demultiplexers for receiving such combined signals and outputting each signal via a separate output are also disclosed.

Abstract: A method of creating an audio-video stream comprises multiplexing a video component, an audio component, a content reference identifier, and a semantic data packet containing information on the relationship between the video component and the content reference identifier. Apparatus for receiving the audio-video stream, and apparatus for transmitting the audio/video stream are disclosed.

Abstract: A broadcasting signal receiver and a method for transmitting/receiving a broadcasting signal are disclosed. An identifier of a cell is set in the broadcasting signal and, if the cell is changed, channel information of the changed cell can be obtained from program table information having the channel information of the cell. Accordingly, the broadcasting signal receiver can continuously output a program although the cell is changed.

Abstract: This disclosure relates to a converter/multiplexer and associated method of use therefor or converting and multiplexing parallel inputs, a modem, a GPS, or even modem information into a single multimaster broadcast serial bus standard for connecting electronic control units, and more specifically, to a multiplexer for transforming analog, digital, frequency, GPS, or modem inputs into a CAN bus data transmittal over LAN and/or PAN and interrelation with a similarly equipped receiving module. Further, the converter/multiplexer is used alone or in a group as part of a larger system for multiplexing and demultiplexing signals for serial bus processing and also for guidance when the converters are cabled by operators using stored configurations.

Abstract: In a packet transmission device and control method thereof which can improve the transmission rate of a packet without adding a high speed user data-conversion card, when packet data is inputted through a single arbitrary channel among a plurality of channels, from among a predetermined number of low speed user data-conversion cards provided common to the plurality of channels, the low speed user data-conversion cards by a number corresponding to a ratio between an output transmission rate of the low speed user data-conversion card and an input transmission rate of the packet data are extracted. The packet data is sequentially and cyclically distributed to the low speed user data-conversion cards extracted. Predetermined length user data outputted from the low speed user data-conversion cards are converted into a frame of HSDPA (High Speed Downlink Packet Access) system and multiplexed into a single channel HS-DSCH (High Speed Downlink Shared Channel) to be outputted.

Abstract: An optical signal return path system analog RF signals are sampled using a master clock frequency, and combined with digital data such as Ethernet data at a cable node. The cable node sends the combined signals on a return path over a fiber optic medium to the cable hub. The cable hub extracts an approximate in-frequency replicate of a master clock signal, and can use the replicate master clock signal to desample the digitized RF signals back to analog. The cable hub can further use the replicate of the master clock signal to serialize Ethernet data, and send the Ethernet data back to the cable node via an optical cable in the forward direction. Accordingly, a single master clock signal can be used on a CATV network for encoding/decoding, and transmitting a variety of data signals, which enhances the integrity and reliability of the data signals.

Abstract: An apparatus and appertaining method are provided in which a transmission entity eliminates a frame word of a payload data service and transmits in payload data service in a common frame with payload of other services. Additionally, a transmission unit can provide first payload data and second payload data in a payload section of a common frame, where an entity provides an overhead section in the common frame, the overhead section comprising a common eoc channel which comprises control information related to a transmission path and to one or more transmitted services or terminal equipment types. A transmission entity can transmit overhead data in an overhead section and transmit payload data of a service in a payload section, wherein the transmission entity is configured to relocate information content of operational bits of the service transmitted in the payload section to an eoc channel provided in the overhead section.

Abstract: Each base station transmits a TDM pilot 1 having multiple instances of a pilot-1 sequence generated with a PN1 sequence and a TDM pilot 2 having at least one instance of a pilot-2 sequence generated with a PN2 sequence. Each base station is assigned a specific PN2 sequence that uniquely identifies that base station. A terminal uses TDM pilot 1 to detect for the presence of a signal and uses TDM pilot 2 to identify base stations and obtain accurate timing. For signal detection, the terminal performs delayed correlation on received samples and determines whether a signal is present. If a signal is detected, the terminal performs direct correlation on the received samples with PN1 sequences for K1 different time offsets and identifies K2 strongest TDM pilot 1 instances. For time synchronization, the terminal performs direct correlation on the received samples with PN2 sequences to detect for TDM pilot 2.

Abstract: A broadcasting signal receiver and a method for transmitting/receiving a broadcasting signal are disclosed. An identifier of a cell is configured in second program table information or signaling information of the broadcasting signal. If the cell is changed, channel information of the changed cell can be obtained from second program table information in which transmission channel information of each cell for a broadcasting program is configured. Accordingly, the broadcasting signal receiver can continuously output the program although the cell is changed.

Abstract: The method for automatically dispatching frames applied to a gateway comprises the steps of: using a first transceiver module to receive a plurality of frames from a network system; storing the frames in corresponding dispatch registers if at least a portion of the bits of the frames match one of a plurality of predetermined values; scheduling a dispatch order of the dispatch registers in accordance with a dispatch request; and dispatching frames stored in the dispatch registers to a second transceiver module in accordance with the dispatch order.

Abstract: A system for adding a time stamp to transmission traffic on a wireless network comprises a front end processor that receives a packet from the network and generates a Start Of Frame pulse and a LENGTH field corresponding to a length of the packet. A time stamp generator generates a time stamp by sampling the system master time counter. A synchronizer receives the SOF pulse and the LENGTH field from the front end processor, and generates a control signal. A multiplexer inputs the packet from the front end processor, the control signal and the time stamp, and outputs a modified packet with a field in the packet replaced by the time stamp.

Abstract: An integrated apparatus is disclosed that can directly connect to a portable digital video camera and can record uncompressed video and audio data, along with associated metadata, in the field and elsewhere. Most preferably, the integrated apparatus includes a removable, recordable, reusable digital magazine that may be mounted. Most preferably, the integrated apparatus also supports a variety of input and output formats, and the apparatus may be easily connected to other computing systems, either directly or through network connections, wired or wireless. The digital magazine can be mounted in a variety of docking stations and can be directly connected to a network, allowing the video and audio data to be easily stored and transferred.

Abstract: Real-time Transport Protocol (RTP) voice packets in a terminal are handled by: checking whether a communication payload generated at an RTP transmitting side is a silence payload; and accumulating the silence payload instead of transmitting it upon the communication payload being the silence payload, and forming the RTP packet upon the communication payload being a voice payload or upon the number of accumulated silence payloads reaching a predetermined multi-frame limit.

Abstract: A fiber channel switch element for routing fiber channel frame is provided. The switch element includes a fiber channel port that can be configured to support plural data transfer rates. The data transfer rate may be 1 G, 2 G, 4 G, 8 G or 10 G. The switch element includes a clock configuration module for providing a clock signal that is based on the data transfer rate. A receive segment of the fiber channel port sends a signal to a transmit segment to avoid an under flow condition. The receive segment also waits for a certain frame length after a fiber channel frame is written and before the fiber channel frame is read, depending upon a data transfer rate of a source port. Multiple lanes may be configured as a single 10 G multi lane port or as multiple individual ports.

Abstract: A passive optical network (PON) device, system and method include an optical line terminal (OLT) receiver configured to receive multiple signals at different wavelengths simultaneously and enable multiple transmitters to operate at the same time during one upstream time slot. The optical line terminal employs Orthogonal Frequency Division Multiple Access (OFDMA) to transparently support a plurality of applications and enable dynamic bandwidth allocation among these applications where the bandwidth is allocated in two dimensional frequency and time space.

Abstract: Throughput between personal computers and the Internet is increased by using inverse multiplexing over local loop telephone lines of different users. The different personal computers share the multiple intersubnetwork connections with each other, so that the efficiency of the use of the intersubnetwork connections is increased. Each of the computers is capable of receiving and/or transmitting inverse-multiplexed data signals over the same plurality of intersubnetwork connections. Preferably, at each computer, use is made of a separate connecting device locally coupled to the computer and an intersubnetwork connection and remotely coupled to one or more other such connecting devices. The connecting devices are placed in different housings, each having a regular connection with a local computer and a wireless transmission connection to corresponding connecting devices in neighboring housings.

Abstract: Methods (500, 800) and corresponding systems (100, 200, 300, 400, 900) for generating a pilot symbol (330) include providing an M-point parallel transform sequence that is a discrete Fourier transform of a CAZAC sequence (312, 504-508). The M-point parallel transform sequence (312) is distributed (316, 510) to a set of M subcarriers among N subcarriers to form an N-point frequency-domain sequence (318) wherein the M subcarriers are evenly spaced apart. An N-point inverse fast Fourier transform (320, 512) is performed to convert the N-point frequency-domain sequence to an N-point time-domain sequence (322). The N-point time-domain sequence is converted (324, 514) to a serial sequence (326), and a cyclic prefix is added (328, 516) to the serial sequence to form a pilot symbol (330).

Abstract: System and methods are provided for multiplexing digital data. In accordance with certain implementations, a method is provided that includes coordinating transmission of digital data elements of a packet including digital data elements arranged 1 . . . n. The coordinating step may include transmitting a first stream of data elements stored in memory, starting with data element 1 of the packet and proceeding upward through the data elements of the packet in sequential order, and transmitting a second stream of data elements stored in the memory, starting with data element n of the packet and proceeding downward through the data elements of the packet in sequential order, wherein transmitting of the first stream and the second stream is attempted to be performed during the same time. The method may also include terminating any sending of the first and second streams of data elements when the entire packet has been received.

Abstract: A USB port transmitter includes a plurality of arbiters, each employing a distinct priority rule to select one USB transmission from among multiple scheduled USB transmissions based on their types. A selector selects one of the arbiters to select the one USB transmission from among the multiple scheduled USB transmissions. A programmable storage element controls the selector to select the one arbiter. In one embodiment, at least a first arbiter prioritizes header/data packets higher than link commands, and at least a second arbiter prioritizes link commands higher than header/data packets. In one embodiment, at least one arbiter prioritizes flow control and power management link commands higher than header/data packets. In one embodiment, at least a first of the arbiters prioritizes USB LGO_Ux link commands higher than USB LAU/LXU link commands, and at least a second arbiter prioritizes USB LAU/LXU link commands higher than USB LGO_Ux link commands.

Abstract: With the growing number of, both personal and shared, devices that may be connected to the Internet, the number of possible media sources that may provide input for a message increases, as does the complexity of message preparation. Additionally, with the introduction of shared devices, such as televisions, as media sources for messages, both authentication and security issues are of fundamental importance. Aspects the present invention are related to systems and methods for combining media inputs at an external, central server for messaging.

Abstract: In a cable modem system, increasing or decreasing the rate of an MPEG Transport Stream involves two separate, but related, tasks: 1) incorporating a sufficient number of additional packets (or discarding packets) to make up for the difference in data rates between input and output, and 2) altering timing information (for instance, PCR (Program Clock Reference) values) present in some incoming packets to reflect their altered positions in the output stream. Both of these tasks can be facilitated by the use of a FIFO (First-In, First-Out) structure, through which the data flows.

Abstract: A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.

Abstract: A method for transporting a client signal in an optical transport network (OTN) includes steps as follows. A byte number Cn of a client signal transported in a current OTN frame period is generated according to a client signal clock and a system clock. If the Cn of the current OTN frame falls in a certain range, a predetermined area in an optical channel payload unit-k (OPUk) overhead field is identified as normal, and the Cn is filled in the OPUk overhead field of the current OTN frame. Therefore, the reliability for transporting the client byte number can be improved and an OPUk overhead byte space needed for transporting the client signal byte number can be saved.

Abstract: A method for controlling the voltage of signals used to control power amplifiers is described. A first multiplexer and a second multiplexer are set to an enabling signal. The first multiplexer is on a first integrated circuit and the second multiplexer is on a second integrated circuit. A command is written to the first multiplexer to set the first multiplexer to one of a plurality of control signals used to control a power amplifier. A command is written to the second multiplexer to select one of the plurality of control signals that maps to the first multiplexer. The second integrated circuit is connected to a power supply.

Abstract: A circuit has first portion that receives data at a first rate; a second portion that outputs data at a second rate synchronized to and different from the first rate; a third portion that transfers data from the first portion to the second portion; and a fourth portion that generates an error detected signal in response to a disruption in the synchronism between the first and second rates. A different aspect involves a method that includes: receiving data at a first rate in a first portion; transferring data from the first portion to a second portion; outputting data at a second rate from the second portion, the second rate being synchronized to and different from the first rate; and generating an error detected signal in response to detection of a disruption in the synchronism between the first and second rates.

Abstract: A device and method are disclosed wherein a receiver signal line within an integrated circuit may be selected for probing. In one embodiment, a plurality of signal pads and a test pad are provided on an external surface of an integrated circuit chip. A plurality of signal lines extends through the integrated circuit chip to the signal pads. A multiplexer on the integrated circuit chip is configured for individually selecting any of the signal lines. An amplifier on the integrated circuit chip amplifies a selected signal and communicates the amplified signal to an externally-accessible test pad to be probed.

Abstract: A transmission system includes a transmission apparatus and a receiving apparatus for repeatedly transmitting and receiving a frame with plural time slots at a constant frequency, in which digital audio data of plural channels and auxiliary data required to playback the digital audio data are transmitted using previously allocated time slots. A multiplexer is provided for multiplexing, assuming an area made up of previously allocated time slots that are included in respective frames amounting to a number of a multiple of n as block data when the predetermined encryption unit is n bytes. The digital audio data and the auxiliary data are allocated as the block data wherein the auxiliary data is allocated to the time slots that are located at the same positions of respective plural frames within the block data, and the digital audio data is allocated in the time slots that are located at the same position in the respective frames amounting to the number of a multiple of n in the block data.