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7616722 |
Method and circuitry for extracting clock in clock data recovery system
A method for extracting a clock in a clock data recovery system is provided. The method includes the following steps. First, a serial link transmission data is sampled for a plurality of times, and...
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7558354 |
Pilot symbols in communication systems
This invention relates to signal processing in telecommunications, particularly but not exclusively for use in wireless TDMA systems. In particular, the invention concerns methods for use in...
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7558868 |
Information processing device and method, recording medium, and program
An information processing apparatus and method, a recording medium, and a program for removing jitter and reducing the delay of the information processing system. A substantial error is produced...
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7539258 |
Audio data sync format detecting circuit
The present invention provides an audio data sync format detecting circuit that can minimize both the hardware configuration software processing, and furthermore, has a large flexibility with...
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7499509 |
Receiver for compensating nonlinearly distorted multicarrier signals
An apparatus for compensating nonlinearly distorted multicarrier signals, a multicarrier signal receiver using the same, and a method therefor are provided, where the apparatus for compensating...
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7489755 |
Method and apparatus for transmission and reception of data
Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator ( 110 )...
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7474723 |
DSRC communication circuit and communication method
A DSRC communication technology that prevents unique word detection errors even when the frame changes in data reception and the timing of the unique word detection window and the timing of the...
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7382846 |
Off-symbol correlation technique
A method of correlating a signal to a synchronization pattern is disclosed. The signal has a waveform with frequency and phase angle components that may be varied, at each repeated signal pulse, to...
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7342946 |
Device for processing data signals, method thereof, and device for multiplexing data signals
In a device for processing data signals, a storing part stores an input signal and the data signals included in the input signal are extracted from the storing part and the data signals are output...
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7292667 |
Method and system for transmitting synchronization information with data
A method for transmitting synchronization information with data, which data corresponds to a sequence of samples representative of a signal, includes detecting the occurrence of two consecutive...
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7260657 |
Serial data transferring apparatus
A master unit sends a start signal to a slave unit. When receiving the start signal from the master unit, the slave unit sends, to the master unit, a synchronization field that is a data train...
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7239813 |
Bit synchronization circuit and central terminal for PON systems
A bit synchronization circuit composed of a multiphase data sampling unit for converting each received burst data sets to multiphase data trains, a phase determination unit for generating a control...
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7194059 |
Method and apparatus for skip-free retiming transmission of digital information
A skip-free retiming system and method for transmission of digital information in a plesiochronous data communication system is described. The system is capable of supporting an unlimited number of...
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7075951 |
Method and apparatus for the operation of a storage unit in a network element
In an embodiment, an apparatus includes a storage unit to store data from a data signal. The apparatus also includes control circuitry coupled to the storage unit. The control circuitry is to cause...
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7065132 |
Memory-free retimer
A method of transmitting digital signals which are passed via a communication system by means of a retimer between an input and an output, whereby according to the invention the data packet applied...
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7058073 |
Arrangement and method for transmitting data over a TDM bus
The invention relates to a TDM backplane bus system, in which a Frame Synchronisation signal is developed from an external communication signal, a data clock signal is produced from a free running...
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7031348 |
Apparatus and method of splicing digital video streams
A splicing system includes a splicer for seamlessly splicing togther digitally encoded data streams. In a preferred embodiment, the splicer preferably parses successive splice buffers of data...
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7015733 |
Spread-spectrum clock generator using processing in the bitstream domain
A spread-spectrum phase-locked loop clock generator includes a PLL circuit, a modulation generator, a bit stream processor and a multiplexer. The modulation generator outputs a bitstream in...
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6985550 |
Jitter control processor and a transceiver employing the same
The present invention provides a transceiver couplable to a communications network having a jitter control processor and methods of operating the same. In one aspect of the present invention, the...
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6980616 |
Transmission method and device
A transmission method uses multiple kinds of control codes to be exchanged on a serial transmission path between a sender side and a receiver side, and each of the multiple kinds of control codes...
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6977975 |
Digital clock recovery PPL
An apparatus comprising an analog circuit, a first digital circuit, and a second digital circuit. The analog circuit may be configured to generate a plurality of samples of an input signal in...
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6904550 |
Velocity enhancement for OFDM systems
An orthogonal frequency division multiplexing (OFDM) transmitter method, consistent with certain embodiments of the present invention arranges OFDM data symbols representing data bits for...
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6856660 |
Signal processing method and apparatus and disk device using the method and apparatus
A signal processing circuit having a data sync signal detector and a disk device. Input data read from a magnetic disk is input to a data discriminator. A data discrimination output constituting a...
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6807638 |
Apparatus for and method of in-band clock compensation
A novel and useful apparatus for and method of in-band clock compensation for use in synchronous communication systems. The clock compensation mechanism is implemented in each module and is...
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6804265 |
Apparatus and method interface improvement for digital circuits
An apparatus comprising a parallel arrangement of circuits is described. Each circuit has a data net input. Each circuit has an indication signal net input configured to transport an indication...
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6775300 |
Clock distribution in a communications network
Clock information related to a reference clock is distributed from a master network node to a slave network node in an asynchronous packet-based network by embedding the clock information into an...
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6735257 |
Audio blend method and apparatus for AM and FM in-band on-channel digital audio broadcasting
A method is provided for transmitting a composite digital audio broadcast signal having an analog portion and a digital portion to mitigate intermittent interruptions in the reception of said...
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6727790 |
Acquisition of sychronization in a spread spectrum communications transceiver
A novel and useful acquisition and synchronization mechanism for spread spectrum communication systems whereby a synchronization sequence comprising a plurality of known symbols spaced apart by...
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6711221 |
Sampling offset correction in an orthogonal frequency division multiplexing system
An Orthogonal Frequency Division Multiplexing (OFDM) receiver detects and corrects sampling offsets in the time domain. The OFDM receiver oversamples a training sequence or symbol in a received...
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6658074 |
Method and apparatus for reproducing clock signal of low order group signal
In a clock signal reproducing circuit in a pulse stuffed synchronizing system, a destuffing circuit removes stuff pulses and unnecessary bits from a higher order group signal to output a lower...
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6625241 |
Data communications bit stream combiner/decombiner
A method and apparatus for multiplexing and demultiplexing multiple serial data streams provide double the data throughput on a single media channel, such as Fibre Channel (EC). A first incoming...
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6594320 |
Orthogonal Frequency Division Multiplexed (OFDM) carrier acquisition method
In all wireless systems, the first operation that must take place at the receiver is the acquisition of the carrier and timing. OFDM systems are particularly sensitive to carrier offsets since...
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6546055 |
Carrier offset determination for RF signals having a cyclic prefix
A method of determining an integral portion of a carrier offset Δf c of an RF signal transmitted from a transmitter at a transmit carrier frequency f ct and an apparatus for carrying out the...
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6529571 |
Method and apparatus for equalizing propagation delay
An apparatus for and method of generating a signal for equalizing propagation delay among parts of a transceiver are disclosed. The parts each have a plurality of channels, and each channel is...
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6522706 |
Delay spread estimation for multipath fading channels
An efficient method of accurately estimating delay spread in multi-path transmission applications is based on quantifying the effect of the actual delay spread on the shape of the correlation...
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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...
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6501809 |
Producing smoothed clock and data signals from gapped clock and data signals
A clock smoothing circuit generates a smoothed clock signal from a gapped clock signal having unevenly spaced pulses separated by gaps that result from the removal of data bits and from a reference...
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6480555 |
Method and apparatus for extended range frequency correction burst detection
A radio communication device provides extended burst tone detection for a demodulated I and Q input signal. The device includes a first burst detector coupled with the input signal and provides a...
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6438175 |
Data transmission method and apparatus
In transmitting ten-bit word string data including synchronous word data converted, at a transmitting side, from eight-bit word string data, representing signal information data synchronization...
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6433894 |
Data transfer within a communication system
The remote unit ( 113 ) maintains a count of inserted blank scan lines generated by the remote unit ( 113 ) and uses this to maintain a fixed number of scan lines per page during facsimile...
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6429902 |
Method and apparatus for audio and video end-to-end synchronization
A method and apparatus for synchronization of an audio/visual bitstream is transmitted by an encoder and received by a decoder by employing duplication or elimination of audio samples and video...
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6404758 |
System and method for achieving slot synchronization in a wideband CDMA system in the presence of large initial frequency errors
A system and method are provided for achieving slot synchronization in a Wideband CDMA system in the presence of large initial frequency errors. A FSC matched filter having a reduced coherence...
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6400734 |
Method and architecture for TDMA receiver incorporating a unique word correlation control loop
A system includes a unique word correlator module which correlates a unique word field in a burst of a time division multiple access (TDMA) signal against a predefined marker sequence. Automatic...
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6396883 |
Method for detection of pilot tones
A method identifies a pulse sequence having known values and a known length in a signal. According to this method, the mathematical sign of the phase difference between samples of the signal is...
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6359933 |
Frame synchronization in muticarrier transmission systems
A discrete multitone modulation transmission system is described in which frame synchronization is monitored at the receiver by correlating frequency domain complex amplitudes of a synchronizing...
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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...
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6334026 |
On-screen display format reduces memory bandwidth for time-constrained on-screen display systems
A multimedia decoder is provided that inserts synchronization words into elementary linear pulse-code modulation (LPCM) audio bitstreams. In one embodiment, the multimedia decoder includes a...
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6285724 |
Receiving apparatus for decoding serial signal into information signal and communication system with the receiving apparatus
A receiving apparatus is provided for receiving a serial signal composed of a sequence of signals transmitted through a transmission medium. In the receiving apparatus, a receiving circuit receives...
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6266384 |
Method and apparatus for time base recovery and processing
An apparatus and method for receiving a bitstream containing timing information and respective program information, the program information is processed and associated with locally generated timing...
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6236694 |
Bus and interface system for consumer digital equipment
A system for generating a signal for coupling digital audio, video and data signals in compressed form via a bus. A processing means formats the digital audio, video and data signals into...
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