Conexant Systems, Inc.

Mindspeed Technologies, Inc.

Silicon Laboratories Inc.

Rockwell International Corporation

Pctel, Inc.

Other

Rockwell Semiconductor Systems, Inc.

Sverrir Olafsson

Burk Beadle

Ragnar Hlynur Jonsson

Keith T Chu

Xuming Zhang

Elias Bjarnason

Olafur Orn Jonsson

Charles F Raasch

Zhenyu Zhou

Craig E Borden

Andrew B Webster

Robert T Otten

Nimesh Doshi

Trausti Thormundsson

P Michael Henderson

William W Jones

Sandeep Rajpal

Joel D Peshkin

Govind Kannan

Yair Kerner

Shrenik P Patravali

Youhong Lu

Vilhjalmur S Thorvaldsson

Ismail I Eldumiati

Mickey C Rushing

Olafur H Jonsson

Ramin A Nobakht

Sveinn V Grimsson

Iddit Shalem

Michael P Henderson

Adeline Tracz

Yair Apartment 14 Kerner

A system for detecting motion comprising a first speaker, a first microphone separated from the first speaker by a distance D, a sound generator, an echo parameter measurement device and an echo parameter monitor, wherein the echo parameter monitor stores two or more sequential echo parameters and generates a motion indicator if the two or more sequential echo parameters indicate a change in an acoustic echo path that exceeds a predetermined threshold.

Integrated motion detection using changes in acoustic echo path

Acoustic echoes in communications systems are distracting and undesirable. Acoustic echoes occur in communications systems where sound produced by a speaker is picked up by a microphone in a communications system. In a stereo playback environment, echo cancellation techniques become more complicated. Echo cancellation can be performed by performing echo cancellation on a center signal, which is the sum of a left channel signal and the right channel signal, or left signal and a difference signal, which is the difference of the right channel signal and the left channel signal. The adaptation rates of the two echo cancellers meet certain constraints to prevent degeneracies in the echo cancellation system.

Systems and methods for stereo echo cancellation

An apparatus for abstract memory addressing. A processor for generating an abstract memory address. A base register for storing a base memory address. An adder for adding the base memory address to the abstract memory address and generating a physical address for a device memory. A pointer register for storing the physical address, wherein the pointer register is directly coupled to the device memory.

Apparatus and method for abstract memory addressing

Systems and methods enhancing auditory experience for a user are provided. The method comprises receiving ambient sound by way of one or more microphones positioned about a user; monitoring the user's movements to determine sound signals interesting to the user; processing the received ambient sound based on the user's movements to at least: increase inclusion of the interesting sound signals in a generated audio output; or reduce inclusion of uninteresting sound signals in the generated audio output.

Selective acoustic enhancement of ambient sound

Disclosed herein are systems and methods for sending and receiving facsimile transmissions in a voice-over-IP system. In certain embodiments, a facsimile machine may include a network interface and a call set up protocol client configured to interface with a call set up protocol server. The call set up protocol client may communicate with the call set up protocol server using the network interface to establish a communication channel with the public switched telephone network. The call set up protocol client may operate according to the session initiation protocol. The facsimile machine may be configured to send and receive facsimile transmissions according to the T.30 protocol. In alternative embodiments, the facsimile machine may be configured to send and receive facsimile transmissions according to the T.38 protocol.

Systems and methods for network facsimile transmissions

A modem to modem communication system supports call waiting services by exchanging hold request and acknowledge signals before relinquishing the line servicing incoming calls. Thereafter, the modem to modem session is reestablished without having to redial. The hold request may be denied or accepted, and may define the duration a modem will hold before hanging up. The holding modem maintains the session by fooling the higher protocol layers, making them believe that the modem is not on hold. Three-way calling services are also used to free up the shared line for outgoing calls while maintaining the session with holding modems. A table may be employed to screen incoming calls through a comparison of the caller ID information with that in the table. The table may be within the modem or the host computer. A quick startup procedure for a modem system utilizes known characteristics of a previously established communication channel to reduce the initialization period associated with subsequent connections over the same channel.

Modem with hold and quick connect functionality

A modem to modem communication system supports call waiting services by exchanging hold request and acknowledge signals before relinquishing the line servicing incoming calls. Thereafter, the modem to modem session is reestablished without having to redial. The hold request may be denied or accepted, and may define the duration a modem will hold before hanging up. The holding modem maintains the session by fooling the higher protocol layers, making them believe that the modem is not on hold. Three-way calling services are also used to free up the shared line for outgoing calls while maintaining the session with holding modems. A table may be employed to screen incoming calls through a comparison of the caller ID information with that in the table. The table may be within the modem or the host computer.

Use of modem on hold for network management and telephone access

Using modems to place modem connections on hold and to maintain upper layer network connection

A quick startup procedure for a modem system utilizes known characteristics of a previously established communication channel to reduce the initialization period associated with subsequent connections over the same channel. In response to the establishment of a call, the modem devices determine whether the quick connect protocol is supported. If so, then the called modem transmits a modified answer tone to the calling modem. The calling modem analyzes the signal received in response to the modified answer tone to determine whether characteristics of the current channel are similar to stored characteristics associated with a previous connection over the same channel. If a channel 'match' is found, then the modem devices carry out a quick initialization routine that eliminates, abbreviates, or modifies a number of procedures or protocols that are carried out in conventional modem startup processes. The general quick startup techniques may also be applied in the context of a quick reconnect procedure that can be performed in response to a temporary pausing or disconnecting of the data modem mode.

Method and apparatus for quick modern reconnect

A fast startup procedure for a modem system utilizes known characteristics of a previously established communication channel to reduce the initialization period associated with subsequent connections over the same channel. In response to the establishment of a call, the modem devices determine whether the fast connect protocol is supported. If so, then the called modem transmits a modified answer tone to the calling modem. The calling modem analyzes the signal received in response to the modified answer tone to determine whether characteristics of the current channel are similar to stored characteristics associated with a previous connection over the same channel. If a channel 'match' is found, then the modem devices carry out a fast initialization routine that eliminates, abbreviates, or modifies a number of procedures or protocols that are carried out in conventional modem startup processes.

Method and apparatus for fast V.90 modem startup

Systems compensate for the presence of digital impairments using adaptive constellation techniques. Sample magnitudes are estimated from received samples transmitted during a training period using an algorithm based on minimizing the sum of squares of the estimated errors, afterwhich a suitable constellation is derived. In one embodiment, an optimum least-squares algorithm is employed. In an alternate embodiment, a least mean squares (LMS) or normalized LMS algorithm is performed.

Methods and apparatus for adaptive PCM level estimation and constellation training

A pulse code modulation (PCM) modem system employs a relatively white training signal to optimize the adaptive filter coefficients in the receiver equalizers. During the training mode, any line coding or equivalent spectral shaping is disabled to provide a training signal sequence having a substantially even spectral content. The presence of DC within the training signal reduces the likelihood that the error function of the equalizers will settle at a local minimum. Following the training interval, the encoder enables the line coder to condition the digital input sequences, introduce DC nulls, and reduce the detrimental effects of baseline wander.

Method and apparatus for training linear equalizers in a PCM modem

Method and apparatus for quick modem reconnect

A fast train protocol for use by a high-speed point of sale (POS) modem is disclosed. In one aspect, the fast train protocol may include he following exemplary steps: receiving an instruction to connect to a remote modem; transmitting a tonal signal to the remote modem for a pre-determined period of time in response to receiving the instruction, where the tonal signal identifies the POS modem as being capable of supporting the fast train protocol; receiving an S signal from the remote modem in response to transmitting the tonal signal; receiving an S\ signal from the remote modem following receiving the S signal; receiving one or more remote PP signals from the remote modem following receiving the S\ signal; and receiving a remote parameter sequence from the remote modem following receiving the one or more remote PP signals.

Point of sale modem for high-speed communications

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Reykjavik, Iceland

Sverrir Olafsson