Motorola Corporation

The Mathworks, Inc.

Ali Behboodian

Pratik Desai

Marc Andre Boillot

Audley F Patterson

Wayne W Ballantyne

Chin Pan Wong

Patrick Joseph Doran

Radu C Frangopol

Mohammad M Ghomeshi

Samuel Han Siong Chia

Pratik V Desai

The disclosed methods, mechanisms, and system provide the ability to associate one or more disjointed models such that a second model can be accessed from a first model thereby allowing easier navigation between models. A graphical link to a second model is provided as part of a first model. Activating the graphical link opens the second model for viewing or editing. Links between additional models may also be provided. Thus, by using the provided graphical links, a user may quickly and easily navigate between all the associated models.

Method of graphically linking multiple disjoint models

The invention provides a method and system for dynamically estimating background noise. The system includes a portable communication device, a vocoder, and a voice activated detector. Based on information received by the portable communication device, the vocoder determines parameters related to incoming information including a voicing mode indicative of the periodicity of incoming information. The voice activated detector then compares the voicing mode to a threshold to determine whether a background noise estimate should be updated. The method includes the steps of: receiving a periodicity indicator and a current comfort noise level for an incoming voice frame; comparing the periodicity indicator with a predetermined threshold if the current comfort noise level is equal to a previous comfort noise level; and maintaining a background noise estimate if the periodicity indicator exceeds the predetermined threshold and revising a background noise estimate if the periodicity indicator does not exceed the predetermined threshold.

Method for fast dynamic estimation of background noise

A sigma delta digital-to-analog (D/A) converter system () includes a summing device () at an input of a D/A converter (), and a low frequency low amplitude wave signal () injected at an input of the summing device that remains unfiltered and is used to suppress spurious tone artifacts. The D/A converter system can further include an amplitude control and a frequency control for selectively adjusting the frequency and the amplitude of the low frequency low amplitude wave signal being injected. Note, the low frequency low amplitude repeating wave signal generator can take the form of a digital signal processor (DSP) () having the appropriate software to generate such signals.

Method and system for mitigating background noise for a Sigma-Delta digital-to-analog converter

A communication device () for dual mode muting operation includes a user interface () and a controller (). The controller () is programmed to: in response to a first user input to the user interface (), enable a first muting mode; and in response to a second user input to the user interface (), disable the first muting mode and enable a second muting mode. The first muting mode may be one of a full muting and a concealed muting, while the second muting mode may be the other one of a full muting and a concealed muting.

Communication device with dual-mode muting and method therefor

A telephone () and a method for providing outbound audio when the telephone is operating in a speakerphone mode. A first data unit () including a first unit type identifier () can be received by the telephone. The first unit type identifier can be an indicator of a type of audio data contained in the first data unit. For instance, the first unit type identifier can indicate whether the audio data is music or non-music audio data. If the first unit type identifier has a first value, for example a value indicating that the audio data is music data, unmuted outbound audio reproduced from the first data unit can be provided and voice activity detection can be disabled. Additionally, inbound audio can be muted.

Speakerphone having improved outbound audio quality

The invention concerns a method () and system () for improving voice quality of a vocoder (). The method includes the steps of monitoring () a pitch of a voice signal () at a transmitting unit (); when the pitch of the voice signal reaches a predetermined threshold (), shifting () the pitch of the voice signal to at least a portion of a predetermined range (); transmitting () the pitch-shifted voice signal to a receiving unit (); and at the receiving unit, reshifting () the pitch-shifted voice signal to a level that compensates the step of shifting the pitch of the voice signal at the transmitting unit.

Method and system for improving voice quality of a vocoder

The invention concerns a method () and system () for controlling audio output. The method includes the steps of inputting () an audio signal and a voltage level signal, measuring () the audio signal and the voltage level signal, mapping () the audio signal against at least one table () of predetermined corresponding gain targets () and selecting () at least one gain target for the audio signal. The mapping step and the selecting step are based at least in part on the measurement of the voltage level signal and the measurement of the audio signal. The method also includes the step of applying () the gain target to the audio signal.

System and method for controlling audio output

A speakerphone arbitration method is used to eliminate the effects of echo in imperfect telephone circuits. The method assumes that speech energy received at the speaker phone is an echo, unless the speech energy has characteristics that indicate it is not echo, such as the duration of the speech energy, and the time at which the speech energy is received relative to the time when the user of the speakerphone finishes speaking, or pauses while speaking. The method also may allow arbitration if the speech energy is more energetic than a typical echo, regardless of the duration or time when it is received.

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Natick, MA, United States of America

Ali Behboodian