Quotables
"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7796748 | Telecommunication terminal able to modify the voice transmitted during a telephone call A telecommunication terminal receives an analog speech signal from a user of the terminal and converts the analog speech signal into a digital signal. A vocoder applies source coding to the speech signal and extracts reconstruction parameters from the speech signal.... | 09/14/2010 |
| 7747000 | Subscriber line driver with equalizer Various embodiments are configured to transform characteristics of a communication signal. One embodiment is a method comprising decreasing amplitude of a first detected portion of the communication signal so that the decreased amplitude is in close proximity to a p... | 06/29/2010 |
| 7463731 | Apparatus and method for dual mode phone A dual mode packet phone is provided, comprising a first connector to connect the phone with a data network, and a second connector to connect the phone with a backup network. The phone automatically switches between the data and backup networks in the event that th... | 12/09/2008 |
| 7352856 | Telephone applicable to PSTN and IP network and call connection control method A telephone applicable to PSTN and IP network having functions of obtaining, when a call is originated by entering a PSTN telephone number, an IP network telephone number of a destination telephone corresponding to the PSTN telephone number from a telephone number t... | 04/01/2008 |
| 7319743 | Method for enabling a user interface for a network telephone According to the present invention, methods, data structures, and computer-readable media for processing input to a telephone having an interactive user interlace are disclosed. A telephone user inputs commands through buttons and keys on an interactive user interfa... | 01/15/2008 |
| 7317793 | Method and system for providing DC power on local telephone lines A system for providing DC power on local telephone lines, such as telephone lines in a building or office, for powering devices and circuitry associated with communications over those telephone lines, as well as other functions. Desired voltage and power levels are ... | 01/08/2008 |
| 7289626 | Enhancement of sound quality for computer telephony systems Techniques for enhancing the sound quality of computer telephony systems are provided. In general, digital signals including telephony sounds are converted from the time domain to the frequency domain. If noise is detected in the frequency domain conversion of the d... | 10/30/2007 |
| 7274732 | Echo cancellation in communication systems with asymmetric data rates A communication device (e.g., a modem) is disclosed as including logic that processes a transmit signal before providing a signal to an echo canceler. The processing may include low pass filtering and decimation of the transmit signal. The low pass filter's cut-off ... | 09/25/2007 |
| 7269783 | Method and apparatus for dedicated hardware and software split implementation of rate matching and de-matching In the method of rate-matching, software is used to calculate at least one rate-matching parameter for data, and dedicated hardware is used to perform at least one of a puncturing and repetition process on data based on the calculated rate-matching parameter. In rat... | 09/11/2007 |
| 7245637 | Methods and apparatus for suppressing signaling tones in telephony signal In some embodiments, a method includes detecting a tone in each data frame of a sequence of telephony signal data frames. A first data frame of the sequence of telephony signal data frames may be transmitted immediately after detecting the tone therein. Transmission... | 07/17/2007 |
| 7188196 | Method and apparatus for playing analog audio to multiple codec outputs Method and apparatus for playing analog audio in an electronic audio system having multiple audio codecs, only one of which has a direct hardware connection to the analog audio source. First analog audio data is received from the analog audio source at a first audio... | 03/06/2007 |
| 7076053 | System for the processing of audio data used for music on hold and paging in a private branch exchange The PBX system includes an analog to digital, and digital to analog, (A/D) conversion where the sample size and the sample rate are selectively adjustable. The A/D structure includes registers which hold values indicating the sample size and the sample rate for the ... | 07/11/2006 |
| 7057543 | Low power method and interface for generating analog waveforms A low power analog output circuit is disclosed that utilizes a low pass filter driven by a bit stream to render a waveshaped output signal based upon a raw digital data signal. The analog output circuit includes sequential bit pattern selection logic that receives a... | 06/06/2006 |
| 7035395 | Digital communication system The present invention provides a digital communication system which is free from noise generated in a receiver. A transmitter converts an analog input signal to a digital signal, and then a power level detector 5 compares the digital signal with a predetermin... | 04/25/2006 |
| 7027832 | Providing custom audio profile in wireless device An apparatus for providing a custom profile in a wireless device, and a method of modifying an audio profile in a wireless device, are disclosed. The apparatus includes a memory into which at least one criterion is entered by the user, a receiver that receives an au... | 04/11/2006 |
| 7020274 | Universal apparatus and method for interfacing signals with telephony networks A communication apparatus is used to interface signals with any one of a plurality of telephony networks having different impedances. The apparatus includes memory, a processor, a digital-to-analog (D/A) converter, and an interface port. Different sets of impedance ... | 03/28/2006 |
| 6970569 | Audio processing apparatus and audio reproducing method An audio processing apparatus that includes a first filter for converting n-channel (n≧1, positive integer) audio signals input from at least one signal source into two-channel signals, a pair of second filters to which two-channel output signals from the first fi... | 11/29/2005 |
| 6965670 | Method for optimizing the transmission properties and the power loss of a high-voltage part which is integrated in a subscriber connection circuit for connecting a subscriber connection line A method for optimizing the transmission properties and power loss of a high voltage part integrated in a subscriber line circuit for connecting a subscriber line wherein, during XDSL data transmission in the high voltage part, current sources which are integrated i... | 11/15/2005 |
| 6940967 | Multirate speech codecs A method of determining a codec mode for encoding a frame in a communications system, the method comprising the steps of: receiving a sequence of signal samples arranged in frames; analysing a current frame to select a codec mode appropriate for the current frame; p... | 09/06/2005 |
| 6928159 | Telephone for connection to a public telephone network In the case of the inventive telephone, telephone operating signals (bell signal, charge-unit signals and caller identifiers) and audio signals are processed together by an integrated circuit. This requires signal level matching to be performed for the individual si... | 08/09/2005 |
| 6928161 | Echo cancellation apparatus, systems, and methods An echo cancellation unit includes a model store to store a current echo model from an adaptive filter when a real-time error occurs. The real-time error is detected by monitoring a convergence metric. In some embodiments, the convergence metric is echo return loss ... | 08/09/2005 |
| 6895089 | Pots splitter with line impedance matching Resistance in parallel with inductors in a series leg of the low-pass filter facilitates changing input and output resistance of the filter with little or no change in the reactance of the inductors. Furthermore, the reactance of the capacitors in the shunt legs of ... | 05/17/2005 |
| 6853724 | Cascade low-pass filter to improve xDSL band attenuation for POTS splitter Cascade low-pass filters are useful in attenuating the xDSL band in a POTS splitter. The design of the low-pass filter is a sixth-order filter having two stages. A first stage includes a fourth-order filter, preferably with a stop-band frequency of approximately 48 ... | 02/08/2005 |
| 6831975 | Digital subscriber line (DSL) modem compatible with home networks A cost-effective filter consuming low power and occupying minimal space. The filter may be used in a ADSL modem (or CPE) to filter the signal components other than the ADSL signals. A high pass filter first filters the low frequency components to attenuate (or remov... | 12/14/2004 |
| 6807262 | Central office control of receive and transmit handset volume A switch based feature that allows subscribers to adjust their incoming or outgoing audio signal strength. The value of the transmit or receive pad values on the subscriber line card are adjusted to control the strength of the audio signal transmitted to, or receive... | 10/19/2004 |
| 6801605 | Telephone network signal conversion system An integrated circuit is provided to convert an analog telephone signal into a digital format. The integrated circuit includes an analog-digital converter coupled to an averager. Sampled analog values are averaged at intervals and compared to a threshold level to de... | 10/05/2004 |
| 6795547 | Full duplex speaker-phone providing increased loop stability A full duplex speaker-phone that performs adaptive filtering to provide increased loop stability between users of the speaker-phone. The invention employs a sliding filter that performs adaptive frequency dependent attenuation of the speech signals within a speaker-... | 09/21/2004 |
| 6771771 | Method and device for echo cancellation An echo canceling device includes a first variable amplifier for variably amplifying an audio signal input through a microphone according to a control signal; a first analog-to-digital converter for converting an analog signal output from the first variable amplifie... | 08/03/2004 |
| 6754336 | Telephone apparatus with hearing assistance A telephone apparatus is disclosed which comprises: a receiving portion for receiving a telephone signal and generating a voice signal from the received telephone signal; a frequency conversion portion responsive to a control signal for frequency-converting the voic... | 06/22/2004 |
| 6731751 | Apparatus for cordless computer telephony An interface apparatus interposed between a cordless telephone base unit and a personal computer sound card. Such interface emulates a Central Office connection with respect to the telephone and a mic and speaker connection with respect to the computer sound card. T... | 05/04/2004 |
| 6728368 | Apparatus and method for a highly efficient low power driver for a central office ADSL system An apparatus and method to implement a highly efficient low power line driver. In a first embodiment, the invention provides a method to increase the power efficiency of a line driver. The method includes supplying a digital signal processor output to a first subtra... | 04/27/2004 |
| 6707909 | Connection apparatus for connecting a digital or analog subscriber line of communication network to communication device A terminal adapter or a private branch exchange modulates a calling party number received from a digital subscriber line and sends a modulated signal to an analog terminal in the OFF period of a ringing signal or before the ringing signal is sent. ... | 03/16/2004 |
| 6553118 | Method and apparatus for calculating DC offset in a digital gyrator A method and apparatus for controlling the DC line current on a telephone line and reducing the amount of error introduced to the system. The error is reduced by compensating for a DC error term introduced by an analog to digital converter having a DC off... | 04/22/2003 |
| 6470083 | Telecommunications off-hook and intrusion detection method and apparatus A method and apparatus to detect off-hook and intrusion conditions on a telephone line. A voltage to frequency converter is used to convert the voltage measured between the TIP and RING terminals of a telephone line to a frequency. The voltage is continuo... | 10/22/2002 |
| 6453040 | Telephone adapter and telephone system providing multiple telephone lines An adapter (42) for connecting a telephone (52) to a telephone wire (40) has a subscriber line interface circuit (SLIC 113) with a jack for connecting a telephone to the SLIC, a line interface (110) for coupling to a telephone line, a signaling circuit (1... | 09/17/2002 |
| 6215868 | Connection apparatus for connecting a digital or analog subscriber line of communication network to communication device A terminal adapter or a private branch exchange modulates a calling party number received from a digital subscriber line and sends a modulated signal to an analog terminal in the OFF period of a ringing signal or before the ringing signal is sent.... | 04/10/2001 |
| 6154537 | Method and apparatus for reducing false ringback detection In a communication device, a decoded audio signal is evaluated by a detection function (112). Two portions of the decoded audio signal spectrum are evaluated, a ringback band (206), and the remaining band(s). The signal strength in the ringback band is me... | 11/28/2000 |
| 6044150 | Method and apparatus for a host-based personal computer speakerphone A method and apparatus for implementing a speakerphone within a personal computer having a voice-capable modem and an audio board is provided. The personal computer executes host software providing the user interface for speakerphone operation and the ind... | 03/28/2000 |
| 5949291 | Cordless telephone with digital frequency adjustment A digitally-controlled frequency synthesizer circuit is provided. The synthesizer circuit has a synthesizer that provides as an output a signal that is based on a reference frequency supplied from a resonator circuit. The reference frequency of the resona... | 09/07/1999 |
| 5940498 | Electronic voice circuit configuration An electronic voice circuit configuration can be connected through a first and a second line terminal to a telephone line. The electronic voice circuit configuration has a calling part, a transmitting device, a receiver device, a symmetrical modulator cir... | 08/17/1999 |
