Class 370/914 - RATE CONVERTER

Subclass of Class 370 - Multiplex communications
Definition: Art collection of the multiplex communication system which
No. of patents: 34
Last issue date: 05/06/2008

Number	Title	Issue Date
7369637	Adaptive sampling rate converter Apparatus, methods and techniques for adjusting the phase offset used in sampling rate conversion uses a Farrow structure or the like to compensate for clock problems such as “clock jitter” and/or “clock drift” effects, which typically arise where one clock ...	05/06/2008
7318017	Collecting and exporting on-chip data processor trace and timing information with differing collection and export formats Data processor emulation information that has been collected and arranged into a plurality of first information blocks during the collection process is re-arranged into a plurality of second information blocks which differ in size from the first information blocks. ...	01/08/2008
6760576	Method and apparatus for enhanced rate determination in high data rate wireless communication systems In a variable rate wireless communication system, an explicit reduced-bit rate indicator is used to communicate the data rate and configuration of the transmission to the receiver. Data throughput is increased by reducing the number of bits required to indicate data...	07/06/2004
6535527	Low latency, low power deserializer An apparatus comprising a first circuit, a deserializer circuit and a framer circuit. The first circuit may be configured to present a clock signal and a data signal having a second data rate in response to an input signal having a first data rate. The de...	03/18/2003
6529730	System and method for adaptive multi-rate (AMR) vocoder rate adaption The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech ...	03/04/2003
6480512	Method and device for converting bit rate of serial data A method and device for converting high rate serial data into low rate serial data are disclosed. The device includes: first and second clock application parts for selectively generating a high rate clock and low rate clock according to a selection signal...	11/12/2002
6052381	Arrangement and method for communication The invention relates to an adapter (10) and a method for a communication card (20), preferably a PCMCIA card, comprising communication electronics by means of a host unit (18) I/O port. The adapter (10) automatically configures the communication card (20...	04/18/2000
5909445	Mechanism for transporting digital pots signals within framing structure of high bit rate digital local subscriber loop signals A local subscriber loop architecture embeds digitized POTS signals into the framing format of high bit rate digital subscriber loop signals being transported over a local loop for serving both subscriber digital terminal equipment and a POTS telephone. Th...	06/01/1999
5909434	Bright and burst mode signaling data transmission in an adjustable rate wireless communication system A novel and improved method and apparatus for generating a constant data rate channel supporting signaling data transmission in an adjustable rate wireless communication system is described. In accordance with one aspect of the invention the rate at which...	06/01/1999
5867543	Multi-rate transmission system 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). T...	02/02/1999
5835486	Multi-channel transcoder rate adapter having low delay and integral echo cancellation A multi-channel transcoder with rate adapter converts the data rate of GSM and PSTN network data in a multi-channel network. A transcoder having echo-cancellation features uses the robust voice activity detection functions of the GSM transcoder functions ...	11/10/1998
5751741	Rate-adapted communication system and method for efficient buffer utilization thereof A transceiver (34) includes a rate adaptation buffer (74) that synchronizes a data stream received at a 4.0 kHz rate to a data stream that is transmitted at a 4.05 kHz rate. A transmit section (62) of the transceiver (34) performs rate adaptation using a ...	05/12/1998
5715252	High rate data transmission circuit A 1:N divider 40 divides an input high rate data signal into N (N being 2 or greater integer) division data signals. Data transmission rate converters 701 -70N for converting the transmission rate of each of the N division data signa...	02/03/1998
5563912	High efficiency speech coding apparatus and transit switching system employing the same A high efficiency speech coding apparatus which can eliminate repetitions of high efficiency speech coding and decoding processes of a digital speech signal upon inter-office transit switching without employing a special exchange and a transit switching s...	10/08/1996
5469434	Distributed frame processing for time division multiplexing A time division multiplexer (TDM) is provided for multiplexing data from a plurality of channels. The TDM system generally comprises a high speed time division multiplexed digital data bus, a synchronizing bus, a plurality of channel cards coupled between...	11/21/1995
5444704	Dial restoral method and apparatus In a multidrop data communication system operating at a first bit rate using the High-Level Data Link Control (HDLC) protocol, dial restoral of communications with a particular tributary at a second, lower bit rate is accomplished without requiring the sy...	08/22/1995
5418783	Common channel signal extraction/insertion device A common channel signal extraction/insertion device for a multiplexed digital transmission system includes a common channel signal insertion/extraction circuit instead of time switches. The common channel signal insertion/extraction circuit includes: a re...	05/23/1995
5214650	Simultaneous voice and data system using the existing two-wire inter-face A data adapter for simultaneously providing a low speed channel, a first high speed data channel, and a second high speed channel over a two wire connection; the two wire connection connects the data adapter to a telephone system. The data adapter include...	05/25/1993
5195088	Circuit arrangement for bit rate adaptation A circuit arrangement for converting the bit rate of a frame structured input signal to a predetermined nominal bit rate. The data bits of the input signal are written into an elastic store (6) at the bit rate of such signal by means of a write address co...	03/16/1993
5193089	Key telephone system A key telephone system is provided with a main equipment including at least two extensions and at least one line wire which accommodates a digital line. The key telephone system is arranged to enable reciprocal data communications by effecting speed match...	03/09/1993
5134612	Digital communication terminal equipment A digital communication terminal equipment is coupled between one or a plurality of low-speed group transmission paths and one or a plurality of high-speed group transmission paths. The digital communication terminal equipment comprises a reference part a...	07/28/1992
5020053	Channel access system A channel access system comprises n channel parts for receiving m channels of voice signals and for outputting voice frequency data and signaling data, and a multiplexer part for receiving the voice frequency data and the signaling data of the m channel f...	05/28/1991
4916693	Digital time division multiplex system and method of controlling same A time division multiplex system adaptable for branching services, which includes a predetermined level code generator for generating a signal of the same level and a switching unit for switching between the predetermined level signal and a signal to be m...	04/10/1990
4882726	Full duplex modem system for differing data bit rates A pair of full duplex modems are connected and each is designed to transmit to the other at the same predetermined band rates. One modem is connected to receive data bits for transmission over the channel at a predetermined first (and fast) rate and to tr...	11/21/1989
4837786	Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying A system for data communication between ground stations using an orbiting satellite as a relay includes a technique for avoiding the loss of signals from the satellite during periods of heavy precipitation. Data is communicated from an orbiting satellite ...	06/06/1989
4779266	Encoding and decoding for code division multiple access communication systems Methodology, and associated circuitry, for encoding and decoding signals utilize optimizing orthogonal code techniques that effect autonomy of communications and simplified signal processing, thereby improving reliability. Encoder (121) processes an incom...	10/18/1988
4737952	Time base converter employing two reference position phase lock loop A time base converter employs a two position, phase lock loop (40) to write twice orthogonally spaced signals into a split phase memory (34), which in turn can be read out at the timing rate of an incorporating communications system. The converter effecti...	04/12/1988
4479212	Conference circuit In a digital, time division multiplex communication system, a first-in, first-out buffer (10) at each subscriber station is employed to establish a conference call. The digital words of the conferees being listened to are entered into the buffer as they a...	10/23/1984
4322844	Transmitter-receiver synchronizer A transmitter-receiver synchronizer is described for use in terminating T1 lines from a subscriber line switch at a central time division multiplexed switching system. A shared rate converter provides bidirectional data rate conversion between the 1.544 M...	03/30/1982
4241443	Apparatus for reducing a sampling frequency An apparatus for reducing a sampling frequency which derives information with the bandwidth fB /N (N is an integer) having a sampling frequency of 2fB /N from an input FDM signal with a bandwidth up to fB having the sampli...	12/23/1980
4215245	Variable rate synchronous digital transmission system A synchronous digital transmission system (12), operating over a prescribed range of bit rates, is interfaced with subscribers (10, 11) whose data sources and receivers have different bit rates by means of transmitter and receiver interface networks (13, ...	07/29/1980
4154985	Interface circuit for digital telephone facilities A digital telephone signal interface circuit couples data signal from one digital telephone facility, operating at one data bit rate, to another digital telephone facility operating at another data bit rate. The interface circuit includes a storage system...	05/15/1979
4147894	Time division multiplex communication device comprising a switching matrix between C/E buffers and control circuits Like a conventional time division multiplex communication device, a device according to this invention comprises first terminals, a switching matrix, transducers or C/E buffers, control circuits, and second terminals. The first and second terminals are fo...	04/03/1979
3931472	Asynchronous quadriphase communications system and method A communications system and method for transmitting and receiving two independently timed (asynchronous) binary data signals on a quadriphase carrier. The four phase ambiguity ordinarily resulting from quadriphase transmission and reception is overcome by...	01/06/1976

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Class 370/914 - RATE CONVERTER