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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7460671 | Encryption processing apparatus and method for voice over packet networks In one aspect, a device includes an encoder configured to receive a speech sample and generate an encoded voice packet from the speech sample, the encoded voice packet having a packet size and a plurality of bytes. The device also includes an encryption unit configu... | 12/02/2008 |
| 7457746 | Pitch prediction for packet loss concealment There is provided a pitch lag predictor for use by a speech decoder to generate a predicted pitch lag parameter. The pitch lag predictor comprises a summation calculator configured to generate a first summation based on a plurality of previous pitch lag parameters, ... | 11/25/2008 |
| 7454335 | Method and system for reducing effects of noise producing artifacts in a voice codec There is provided a method of reducing effect of noise producing artifacts in silence areas of a speech signal for use by a speech decoding system. The method comprises obtaining a plurality of incoming samples of a speech subframe; summing an absolute value of an e... | 11/18/2008 |
| 7450619 | Laser driver loop control and method Various systems and methods are provided for biasing a laser. In one example, a feedback circuit establishes a bias current in a laser. A stabilizing capacitor is coupled to the feedback circuit, the stabilizing capacitor slowing the response of the feedback circuit... | 11/11/2008 |
| 7440525 | Dynamic range signal to noise optimization system and method for receiver A system and method for enhancing the dynamic range of a receiver without degrading the signal to noise ratio of an incoming signal is disclosed. In one embodiment, an enhanced dynamic range receiver for receiving an incoming signal and processing the incoming signa... | 10/21/2008 |
| 7433904 | Buffer memory management Various systems and methods for buffer memory management are disclosed. In one embodiment a buffer memory includes at least one queue configured to store a number of buffer access tasks. Buffer reclamation logic is executed to free at least one segment of the buffer... | 10/07/2008 |
| 7428653 | Method and system for execution and latching of data in alternate threads An alternate multi-thread pipeline structure and method are provided. A deep pipeline is provided in which two threads of two separate pipeline stages are alternatively presented to the various logic and latch circuits for execution. The execution and latching of th... | 09/23/2008 |
| 7411941 | Text telephone modem communications over packet networks A modem detection method is provided for use by a first gateway, the first gateway capable of communicating with a second gateway over a packet network. The method comprises setting the first gateway to a voice mode having a first coding scheme, encoding an input si... | 08/12/2008 |
| 7400675 | System and method for digital adaptive equalization with failure detection and recovery An adaptive equalization method and system for automatically adjusting an equalizer to compensate a signal's frequency dependent loss is disclosed. The method comprises setting the equalizer's initial coefficient value, receiving an equalized signal, identifying a p... | 07/15/2008 |
| 7388835 | Gateway configuration for controlling data flow in modem over packet networks An apparatus and method for configuring a gateway device for a modem over packet network session is disclosed. The method for configuring the first gateway device generally comprises: negotiating with a first client device to establish a first link; receiving, from ... | 06/17/2008 |
| 7381935 | Laser power control with automatic power compensation A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a default or target value from memory may be utilized to bias or otherwise control operation of an optic signal generator o... | 06/03/2008 |
| 7379866 | Simple noise suppression model An approach for efficiently reducing background noise from speech signal in real-time applications is presented. A noisy input speech signal is processed through an inverse filter when the spectrum tilt of the input signal is not that of a pure background noise mode... | 05/27/2008 |
| 7349383 | Method and apparatus for low-latency, semantic conveyance of an answer tone over a data network Answer tone received at answering-side gateway and first classification signal is transmitted to a calling-side gateway that generates an answer tone in response to the signal. A second classification signal may be transmitted to the calling-side gateway that adjust... | 03/25/2008 |
| 7346502 | Adaptive noise state update for a voice activity detector There is provided a method of updating a noise state of a voice activity detector (VAD) for indicating an active voice mode and an inactive voice mode. The method comprises receiving an input signal having a plurality of frames, determining an elapsed time since the... | 03/18/2008 |
| 7327732 | Method and apparatus for combined framing and packet delineation Incoming bit stream is processed by a single state machine into a circular buffer. Circular buffer accumulates subunits of data to form a major data unit. State machine recognizes the start of major data unit and flags the location of the major data unit in the circ... | 02/05/2008 |
| 7324524 | Pseudo synchronous machine A method and apparatus is disclosed for interfacing an asynchronous network with a synchronous network and in particular for efficiently utilizing available bandwidth of a synchronous network transmit opportunity. In one embodiment asynchronous traffic arrives via a... | 01/29/2008 |
| 7319220 | Trans-impedance amplifier with offset current A trans-impedance amplifier receives an input current and is operable to generate an output voltage responsive to the input current. The amplifier is responsive to an increased range of input currents and has a wide bandwidth. The amplifier includes an input stage h... | 01/15/2008 |
| 7307983 | Processing destructive breaks in modem over packet networks There is provided a method for handling a destructive break for use by a first gateway device, where the first gateway device is in communication with a second gateway device over a packet network, the first gateway device is connected to a first modem over a first ... | 12/11/2007 |
| 7302619 | Error correction in a cache memory Various systems and methods for error correction of instructions in an instruction cache coupled to a processor are provided. In one embodiment, a plurality of instructions stored in the instruction cache are fetched for execution by the processor, each of the instr... | 11/27/2007 |
| 7298711 | Echo cancellation in a communication device According to one exemplary embodiment, a communication device comprises a line driver, where the line driver provides an output signal. The communication device further comprises a digital echo canceller module coupled to the line driver, where the digital echo canc... | 11/20/2007 |
| 7286471 | Dynamic bandwidth allocation for wide area networks System and method for dynamically altering bandwidth allocation to each region serviced by a network. Each region is allocated an initial estimated bandwidth on the network and compares instantaneous demand against the allocation. When demand falls below the allocat... | 10/23/2007 |
| 7286953 | Device testing automation utility and method Various apparatuses, methods, computer programs, and other systems are disclosed for facilitating testing of a module. In embodiment, a method is provided that comprises the steps of creating a plurality of tasks in a computer system, each of the tasks comprising a ... | 10/23/2007 |
| 7277853 | System and method for a endpoint detection of speech for improved speech recognition in noisy environments According to a disclosed embodiment, an endpointer determines the background energy of a first portion of a speech signal, and a cepstral computing module extracts one or more features of the first portion. The endpointer calculates an average distance of the first ... | 10/02/2007 |
| 7277531 | Method and apparatus for fast V.90 modem startup 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,... | 10/02/2007 |
| 7276682 | Laser power control with automatic compensation A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a default or target value from memory may be utilized to bias or otherwise control operation of an optic signal generator o... | 10/02/2007 |
| 7266493 | Pitch determination based on weighting of pitch lag candidates There is provided a method of selecting a pitch lag value from a plurality of pitch lag candidates for coding a speech signal. The method comprises identifying the plurality of pitch lag candidates from a frame of the speech signal using correlation; classifying the... | 09/04/2007 |
| 7265334 | Laser power control with automatic compensation A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a target value from memory may be utilized to control one or more power levels of an optic signal. There may comprise 2 or ... | 09/04/2007 |
| 7263107 | Data compression over packet networks Methods and systems are provided for use in a MoIP system including a first modem, a second modem and a third modem. An exemplary communication method includes the steps of receiving a call from the first modem by the second modem over a telephone line, contacting t... | 08/28/2007 |
| 7260522 | Gain quantization for a CELP speech coder There is provided a speech encoding system that receives a speech signal. The speech encoding system comprises a frame processor for processing a frame of the speech signal, where the frame processor includes a pitch gain generator that derives unquantized pitch gai... | 08/21/2007 |
| 7231348 | Tone detection algorithm for a voice activity detector There is provided a voice activity detection method for indicating an active voice mode and an inactive voice mode. The method comprises receiving an input signal having a plurality of frames, determining whether each of the plurality of frames includes an active vo... | 06/12/2007 |
| 7215590 | Semiconductor die with process variation compensated operating voltage A semiconductor die includes at least one process monitoring circuit for evaluating at least one process parameter of the semiconductor die. The at least one process monitoring circuit can include a first group of process monitoring circuits for monitoring NFET spee... | 05/08/2007 |
| 7212582 | Combining precoding with spectral shaping In one embodiment, a device includes but is not limited to: a precoder having a precoder input and a precoder output; a spectral shaper, having a spectral-shaper transfer function and being operably coupled internal to said precoder; and a precoder filter, internal ... | 05/01/2007 |
| 7200743 | Simultaneous initialization of a plurality of memory elements from among a plurality of initialization values An electronic device according to one embodiment of the invention includes at least a first memory element and a second memory element, a first plurality of initialization value sets, and a second plurality of initialization value sets. The device further includes f... | 04/03/2007 |
| 7200107 | Method and apparatus for lossless switchover in a redundant switch fabric Method and apparatus for lossless switchover in a redundant switch fabric improves the reliability and predictability of a cell reaching its destination without the cell being lost during switch-over through redundant switch fabrics. Ingress and egress buffers are d... | 04/03/2007 |
| 7194007 | High speed modem Various high speed modem embodiments are provided, for example, having a receiver configured to receive an analog data signal over a telephone line from a first modem, from which digitized analog data signal samples are generated by a processor employing a linear co... | 03/20/2007 |
| 7191122 | Speech compression system and method The invention improves the encoding and decoding of speech by focusing the encoding on the perceptually important characteristics of speech. The system analyzes selected features of an input speech signal, and first performing a common frame based speech coding of a... | 03/13/2007 |
| 7187713 | Method and apparatus for intelligent modem warm start Modem start-up delay reduced by measuring condition of communications line upon connection termination. Variation between termination and start-up line conditions determines if cold or warm start is required. Warm-start may use original condition descriptors. Condit... | 03/06/2007 |
| 7187719 | Method and system for data rate optimization in a digital communication system A method and for optimizing bit rate throughput in a digital communication system is provided. The method includes establishing a relationship between signal to noise ratio and plural symbol rates for a particular constellation size. The method also includes determi... | 03/06/2007 |
| 7181595 | Method for decoding composite VLIW packets utilizing a tree structure To decode a composite VLIW packet, assembly code is provided for the bit patterns corresponding to each individual instruction in the packet. The bit pattern for the template in the packet is then matched against a known template. The known template uniquely corresp... | 02/20/2007 |
| 6959439 | System interface abstraction layer A communications card provides a miniport driver including a system interface abstraction layer (SIAL) that eliminates operating system (OS) specific and platform specific semantics from communication paths between a driver and the rest of the communications system.... | 10/25/2005 |
