3com Corporation

Provo Craft and Novelty, Inc.

U.S. Robotice Mobile Communications Corp.

Mark L Gray

Todor Cooklev

Darrin J Gibbs

Tim Urry Price

Matthew B Strong

Kenneth S Morley

Paul Hepworth

Andrew J Olsen

Ken Morley

Tim Pruss

Paul Nagel

A method of operating a controller device of an electronic cutting machine. The method includes writing a controller device identifier to memory of the cartridge, writing a cartridge identifier to memory of the controller device, and permitting communication between the controller device and the cartridge.

Controller device

A communication system embodying the invention has a communication channel with at least two ends, one end of the channel being connected to a transmission device with relatively limited computational capacity and an other end of the channel being connected to a computer having relatively large computational capacity. The transmission device includes a signal source node; a set of M&minus;1 delay buffers connected in series and defining a set of M progressively delayed signal nodes, M being a positive integer, one end of the series of M delay buffers being connected to the signal source node; a set of M parallel downsampling operators connected to the M progressively delayed signal nodes; and, a parallel-to-serial converter having M parallel inputs and a single serial output, the M parallel inputs being connected to the outputs of the M parallel downsampling operators and the single serial output being coupled to the one end of the communication channel. A set of M parallel filter coefficient multipliers having respective inputs and outputs and corresponding to the respective coefficients H (z ) of an anti-aliasing filter H(z)&equals;&Sgr; z H (z ) is implemented in the computer to minimize the computational requirements for the transmission device to simple tasks.

Video signal processing method and apparatus for internet appliances or embedded systems

A method and system for performing speech recognition for an internet appliance using a remotely located speech recognition application. The invention includes an internet appliance that is connected through a network with either a stand-alone computer or a server computer located at the Internet Service Provider. Verbal commands directed to an internet appliance are received as analog signals and converted to digital signals. The digital signals are remotely translated into a set of instructions by a dedicated hardware device or a software program that operates a speech recognition application at either a stand-alone computer or server computer located at an Internet Service Provider in a form recognizable by the internet appliance. The internet appliance receives and executes the translated instructions.

Method and system for performing speech recognition for an internet appliance using a remotely located speech recognition application

A method and system for facilitating the detection of DTMF tones is disclosed. The method is based on detecting two tones using a modified nonuniform discrete Fourier transform that includes a phase correction term for each DTMF tone and harmonic. The disclosed method is employed by a DTMF detector that includes a sampling module, a computation module, an analysis module, and a decode module. The sampling module samples an input signal from a communication network at a rate sufficient to avoid data loss. The sample signal is then placed through a modified DFT which is more precise than filters or analog devices, particularly those utilizing a Goertzel algorithm. The computation module implements a fast recursive algorithm for completing the necessary computations. The analysis module checks for the present of energy level peaks at the DTMF tones and their harmonics. Once a DTMF signal is verified to contain a DTMF tone, the decode module transmits the,number, letter, or symbol to an interface.

System and method for precise DTMF signal detection

A novel line-current protection circuit that is useable with a PCMCIA modem card is disclosed. The protection circuit is adapted to detect when an excessive voltage is present across the tip and the ring leads of a telephone subscriber loop by sensing the amount of line-current being supplied to line interface circuitry disposed on the PCMCIA modem card. The protection circuit includes a current sensing circuit portion that is placed in series with the tip lead and which detects when the line current exceeds a predetermined maximum amount. In the event the line current exceeds the maximum amount, the current sensing circuit asserts an excessive line current signal which is being monitored by a digital processor. The digital processor responds by causing a relay circuit to be opened, thereby causing the PCMCIA modem to be in an 'on-hook' state. In the presence of the excessive line current signal the digital processor also causes an audible signal to be emitted, thereby alerting the user to the existence of the fault condition. When the magnitude of the line-current does not exceed the predetermined maximum amount, the excessive line current signal is not asserted and the digital processor responds by closing the relay circuitry, thereby causing the PCMCIA modem to be in an 'off-hook' state. The protection circuit also includes a backup fuse, which will trip if the primary components of the protection circuit fail.

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West Jordan, UT, United States of America

Mark L Gray