Matches 51 - 100 out of 275 < 1 2 3 4 5 6 >
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6785299 Optimized high-level data link control encoding/decoding  
A system and method are provided for encoding and decoding a bitstream according to the High level Data Link Control protocol (HDLC) without having to analyze the bitstream bit by bit. An optimized...
6763038 Light transmission equipment  
In a light transmission equipment which can generate a desired concatenation signal from a maximum concatenation signal standardized in a synchronous transmission mode, a master and a slave circuit...
6763036 Framer method architecture and circuit with programmable symbol selection  
An apparatus comprising a register circuit, a detector circuit and an output circuit. The register circuit may be configured to present a parallel signal in response to (i) a serial input and (ii)...
6747997 Network channel receiver architecture  
A network interface controller connects a processing system to receive data from a network fabric through a serial link. The data on the link is clocked in a link clock domain that is different...
6744787 Adaptive phase shift filtration of pointer justification jitter in synchronous-plesiosynchronous signal desynchronization  
Pointer justification event induced low frequency jitter is attenuated during desynchronization of a synchronous input data stream into a plesiosynchronous output data stream. The output data...
6738393 Frame synchronization circuit  
In a frame synchronization circuit, which prevents the occurrence of synchronous error due to a data loss/insertion while restraining a false synchronization/out of synchronization based on typical...
6735255 Correlation based method of determining frame boundaries of data frames that are periodically extended  
A correlator for use in a timing recovery apparatus of a receiver in a multicarrier transmission system. The correlator locates the beginning of a data frame and initializes a pointer register with...
6732204 Data transfer control device and electronic equipment  
The objective is to provide a data transfer control device and electronic equipment that implement bit insertion, encoding, decoding, and bit deletion at a slow clock frequency. A bit stuffing...
6731634 Lost packet replacement for voice applications over packet network  
A method of operating a packet network for carrying voice traffic, wherein the packets carrying voice traffic include voice samples. The method identifies a replacement packet opportunity, creates...
6717958 Video data transmitting/receiving apparatus and method for transmitting video data in a frame structure  
A DS3 frame structure, video data transmitting/receiving apparatus and method for transmitting and receiving video data can minimize the transmission error during the video data transmission, and...
6683887 Asymmetrical digital subscriber line (ADSL) downstream high speed cell bus interface protocol  
An asymmetrical digital subscriber line (ADSL) downstream high speed cell bus interface protocol allows ADSL cell packets to be transmitted downstream from an ADSL bank control unit (ABCU) to a...
6680938 Method and apparatus for cross-connecting data streams with efficient memory utilization and transparent protocol conversion  
A method and system enable cross connection of an incoming data stream to one or more outgoing data streams. Each data stream comprises respective incoming and outgoing frames. Each frame includes...
6636531 Communication device and method  
A communication device for transmitting a sequence of data, which is transmitted thereto at a given transmission rate, at a desired transmission rate greater than the former transmission rate over...
6618399 System and method for eliminating jitter by using a starve/inspect approach to AAL1  
A system and method for transporting telephony signals across an ATM network using AAL1 while eliminating the jitter associated with the AAL1 cells. The present invention uses starve/inspect...
6603777 Method and apparatus for establishing frame synchronization  
The present invention provides a frame synchronous circuit wherein the number of devices handling a high-speed digital signal is limited to the minimum without deteriorating frame pull-in time and...
6577693 Desynchronizer for a synchronous digital communications system  
A desynchonizer for a synchronous digital communications system serves to recover a useful signal from a synchronous digital input signal. It comprises a buffer for temporarily storing the input...
6542480 Satellite payload processing system using polyphase demultiplexing, quadrature phase shift keying demodulation and rate alignment  
A satellite payload processing system for processing an uplink signal consisting of a plurality of single-channel-per-carrier, frequency division multiple access carriers comprises a polyphase...
6516003 Data communication apparatus  
In the conventional data communication apparatus, there has been arisen a flag emulation due to a false pattern similar to the pattern of the true flag in a frame signal including a plurality of...
6510166 Stuffing filter mechanism for data transmission signals  
A method and apparatus for performing bit stuffing operations for transmission signals are described. In an embodiment, a method includes receiving data for a number of channels of a signal. The...
6501786 Direct spread spectrum communication system corresponding to delayed multiplex mode, and method of communication using the system  
A direct spread spectrum communication system in accordance with a delayed multiplex mode in which improvement in correlation and improvement in error rate can be perfectly realized in any data...
6493359 Reconfigurable frame counter  
The invention provides an apparatus, and related method, for providing a reconfigurable frame counter that can accommodate differing start of frame pulse locations in a synchronous communication...
6480533 Method and apparatus for receiving control signals in a data communication system having a fully digital communication channel  
A modem system having two modem devices digitally connected to a digital telephone network includes an inband control signal channel. The inband control signal channel is formed by using the most...
6480475 Method and system for accomodating a wide range of user data rates in a multicarrier data transmission system  
Improved approaches to provide flexibility in setting user data rates and managing delay in data transmission systems using a superframe structure and Time Division Duplexing (TDD) are disclosed....
6459696 Method and system for avoiding data loss in communications systems  
A method and system for avoiding data loss in communications systems. The method and system achieve their objects via communications equipment adapted to do the following: designate a first...
6445719 Method, system and apparatus for reducing synchronization and resynchronization times for systems with pulse stuffing  
A method, system and apparatus for decreasing the time frame synchronization and resynchronization in a data communication uses an long frame sync word formed by combining a frame sync word with...
6442178 System and method for data alignment in a communication system  
A parallel-to-serial-to-parallel circuit are disclosed, the circuit interfacing with a data bus, preferably with a processor for byte alignment and other operations. The...
6400732 Method and apparatus for transmitting data in a high-speed, multiplexed data communication system  
A method and apparatus for determining synchronization and loss of synchronization in a high speed multiplexed data system. The system also includes a plurality of justification control bits and a...
6385212 Data switching apparatus for switching received data without changing coding unit  
A data switching apparatus selects and transmits one of a plurality of received data and switches coded data while holding a coding unit of the coded data. A data switching apparatus includes...
6370158 Wireless T/E Transceiver frame signaling subcontroller  
A system and method providing a structure to the data sent over the air interface of a wireless communication system. The system and method allow compensation for transmitting and receiving...
6339628 Payload relative position change requesting apparatus and transmission apparatus containing the same  
Pointer action in an SDH transmission apparatus is performed in a temporally evenly dispersed manner. Timings of a received VC- 4 clock and a transmit VC- 4 clock, whose portions corresponding to...
6338156 Method and device for detecting the loss-of-signal condition at the input of a transmission line interface  
A method of detecting the loss-of-signal condition at the input of a transmission line interface when the input signal is coded. The input signal decoding includes an additional procedure allowing...
6333940 Integrated digital loop carrier system with virtual tributary mapper circuit  
An integrated digital loop carrier (IDLC) system includes digital line feeders and signal processors to interface with the feeders and to ultimately provide data to subscriber instruments. The...
6307881 Modem control method  
When carrying out pre-processing of image signal transmission using the control channel of a full-duplex modem and switching image signal transmission to the primary channel of a half-duplex modem,...
6272153 DVD audio decoder having a central sync-controller architecture  
An audio decoder architecture makes use of various component sharing techniques to conserve hardware and reduce implementation cost. In one embodiment, the audio decoder comprises a bitstreamer, a...
6263033 Baud rate granularity in single clock microcontrollers for serial port transmissions  
A microcontroller provides an asynchronous serial port with a serial clock derived from the processor clock. Although the serial clock cannot be exactly programmed to yield an ideal frame length at...
6233256 Method and apparatus for analyzing and monitoring packet streams  
A method and apparatus for analyzing and monitoring packet streams in "real time". The packet analyzer comprises an input buffer, a real-time analysis unit, a non-real-time analysis unit, a...
6233250 System and method for reducing latency in software modem for high-speed synchronous transmission  
An ADSL physical transmission layer retrieves data to be transmitted from either a transmit data buffer, or a dummy cell buffer in the case when no actual data is being transmitted to maintain a...
6188692 Integrated user network interface device for interfacing between a sonet network and an ATM network  
A user network interface device for interfacing between synchronous optical network (SONET)/synchronous digital hierarchy (SDH) which is characterized by a continuous stream of frames of data and...
6188685 Synchronous digital transmission system  
A transmission system is indicated for digital signals combined into a multiplex signal, and a network element for such a transmission system. Each network element contains an adapter circuit to...
6181675 Uninterrupted switching between active and backup systems in ATM communication apparatus  
A reception device in the ATM communication apparatus has a format conversion buffer, an underflow detecting circuit, and an in-device empty cell insertion control circuit in each of the active and...
6169752 Method and system for preventing information losses during alternative frequency searches  
A method and system for preventing information losses during alternative frequency searches by a receiving unit in a communication system in which data is channel coded, interleaved, and segmented...
6157967 Method of data communication flow control in a data processing system using busy/ready commands  
A multiprocessor system includes a number of sub-processor systems, each substantially identically constructed, and each comprising a central processing unit (CPU), and at least one I/O device,...
6148009 Timing signal supplying device of doubled timing synchronous system  
A timing signal supplying device in a doubled timing synchronous system includes: a timing signal adjusting portion which feeds back a timing signal of a timing signal receiving circuit and a...
6134233 Apparatus and method of frame aligning information in a wireless telecommunications system  
A wireless telecommunications system (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). A downlink communication...
6108319 Satellite payload processing system providing on-board rate alignment  
A rate alignment apparatus for a satellite includes an on-board clock, an input switch, an output switch and a ping-pong buffer pair including first and second buffers and connected to the input...
6094442 Optical path signal termination equipment  
In optical path signal termination equipment which converts between an SDH signal transmitted at the electrical level and an optical path signal transmitted at the optical level, an optical path...
6088413 Apparatus for reducing jitter in a desynchronizer  
An apparatus, to be used in a desynchronizer, for minimizing the output jitter of the desynchronizer. The desynchronizer is assumed to include a bit buffer for staging data that is to be output....
6064679 Hub port without jitter transfer  
A hub port in a hub which preferably eliminates the transfer of jitter in the signal transmitted to an attached node port. In one implementation, jitter transfer is preferably eliminated by...
6011807 Method and apparatus for transmitting data in a high speed, multiplexed data communication system  
A method and apparatus for determining synchronization and loss of synchronization in a high speed multiplexed data system. The system also includes a plurality of justification control bits and a...
6011774 Order-wire signal handling apparatus  
An apparatus for processing an order-wire signal capable of providing a high quality communication between operators through an order-wire channel for use in a synchronous add drop multiplexer(ADM)...
Matches 51 - 100 out of 275 < 1 2 3 4 5 6 >