Inventor

BETTS WILLIAM L

US96 patents

⚠️ This page may combine multiple inventors who share the name “BETTS WILLIAM L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BETTS WILLIAM L

PARADYNE CORP

Secondary channel for digital modems using spread spectrum subliminal induced modulation

Trellis interleaver and feedback precoder

Self-synchronizing interleaver for trellis encoder used in wireline modems

Distributed trellis encoder

Adaptive comb filter and decision feedback equalizer for noise suppression

Modem in-band secondary channel via radial modulation

Tone ordered discrete multitone interleaver

Fractional bit rate encoding in a discrete multi-tone communication system

Space diversity trellis interleaver system and method

Interleaved generalized convolutional encoder

Linear block interleaver for discrete multi-tone modulation

Linear block interleaver system and method

System and method for transmit signal spectral shaping

Audio distortion canceler method and apparatus

System and method for optimizing the uncoded modulation of circular constellations using circular precoding and nonlinear encoding

System and method for using circular constellations with uncoded modulation

High speed modem for multiple communication circuits

Digital modem for multiple telephone circuits

Device for synchronization of multiple telephone circuits

Communication device and method for using non-self-synchronizing scrambling in a communication system

Subscriber line driver and termination

Method and apparatus for performing a multipoint polling protocol which employs silence intervals for controlling circuit operation

Automatic gain control using the extreme points of a constellation

Half-duplex modem without turnaround delay

Gain tracker for digital modem

Discrete multitone interleaver

Trellis interleaver and feedback precoder

Fractional bit rate encoding in a pulse amplitude modulation communication system

Embedded signal constellations

System and method for transmitting special marker symbol

Self-synchronizing de-interleaver for viterbi decoder used in wireline modems

AT & T BELL LAB

Signal point interleaving technique

Modulus converter for fractional rate encoding

Data communication system with data rate throttling

Non-linear encoder and decoder for information transmission through non-linear channels

Inband coding of secondary data

Detecting loss of echo cancellation

AT & T CORP

System for channel capacity modulation

Method and apparatus for adaptively providing precoding and preemphasis conditioning to signal data for transfer over a communication channel

Method for increasing the dynamic range of a signal in a simultaneous voice and data system by the use of overlapping signal point regions and trellis coding

Method and apparatus for automatically adapting the amount of warping in a system transmitting information through a non-linear channel

Communication mode identification technique

BETTS WILLIAM L

Digital modem having a monitor for signal-to-noise ratio

Block modulus coding (BMC) systems and methods for block coding with non-binary modulus

AT & T PARADYNE

Method and system for a synchronized pseudo-random privacy modem

INNOVATION SPECIALISTS LLC

Sensory enhancement systems and methods in personal electronic devices

LUCENT TECHNOLOGIES INC

Method and apparatus for encoding data for transfer over a communication channel

NCR CO

Interpolating rate multiplier

AMERICAN TELEPHONE & TELEGRAPH

Fractional rate modulation

A T & T PARADYNE

Adaptive transmit pre-emphasis for digital modem computed from noise spectrum