Inventor

GALBRAITH RICHARD LEO

US69 patents

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

GALBRAITH RICHARD LEO

IBM

Method and apparatus for low density parity check encoding of data

Electrical pulse generator using pseudo-random pole distribution

Method and apparatus for implementing soft-input/soft-output iterative detectors/decoders

Method and apparatus for data detection for PRML data channels

Noise predictive maximum likelihood (NPML) detection methods and apparatus based thereon

Method and apparatus for implementing a set rate code for data channels with alternate 9-bit code words and 8-bit code words

Method and apparatus for servo data pattern detection

Noise-predictive post-processing for PRML data channel

Method and apparatus for viterbi detection of generalized partial response signals using partial matched filter and matched filter metrics

Intelligent envelope detector and method for gain control for PRML data and servo channels including polarity detection

Method and apparatus for Viterbi detection of generalized partial response signals including two-way add/compare/select for improved channel speed

HITACHI GLOBAL STORAGE TECH

Techniques for applying modulation constraints to data using periodically changing symbol mappings

Magnetic recording disk drive with patterned media and system for clocking write data

Reduced complexity error correction encoding techniques

Data recording medium with servo pattern having pseudo-noise sequences

Techniques for implementing non-uniform constraints in modulation encoded data

Method and apparatus for enhanced data channel performance using read sample buffering

Data storage device with data recovery process using fixed phase clocking for analog-to-digital conversion

Techniques for modulating data using short block encoders

Optimizing detector target polynomials in read/write channels to achieve best error rate performance in disk drives

Method and apparatus for channel equalization with a digital FIR filter using a pseudo random sequence

Data recording system with servo pattern having pseudo-noise sequences

WESTERN DIGITAL TECH INC

Read level tracking and optimization

Non-binary encoding for non-volatile memory

Implementing enhanced track following during read back using head asymmetry metrics in hard disk drives

Read level tracking and optimization

Transformation of binary data to non-binary data for storage in non-volatile memory

Processing problematic signal modulation patterns as erasures using wireless communication devices

Read level tracking and optimization

Transformation of data to non-binary data for storage in non-volatile memories

Write level optimization for non-volatile memory

HGST Netherlands BV

Disk drive with distributed codeword blocks

Heat assisted magnetic recording system having at least three possible magnetic configurations per physical bit

Magnetic recording disk drive with write position error signal values written in the data tracks for compensation of track misregistration

System and methods utilizing dual read sensors

Disk drive with different data sector integrated preambles in adjacent data tracks

Early detection of degradation in NOR flash memory

Disk drive with different synchronization fields and synchronization marks in the data sector preambles in adjacent data tracks

BRAGANCA PATRICK MESQUITA

Implementing spin-torque oscillator sensing with enhanced demodulator for hard disk drives

Implementing spin-torque oscillator sensing with enhanced delay control feedback circuit for hard disk drives

Implementing spin-torque oscillator sensing with enhanced integrated demodulator for hard disk drives

FRANCA-NETO LUIZ M

Early degradation detection in flash memory using test cells

Data management in flash memory using probability of charge disturbances

Data management in flash memory using probability of charge disturbances

HITACHI GLOBAL STORAGE TECH NL

Techniques for generating bit reliability information in a post-processor using an error correction constraint

Techniques for generating bit reliability information in the post processor

Techniques for providing DC-free detection of DC equalization target

HITACHI GLOBAL STROAGE TECHNOL

Decoding techniques for correcting errors using soft information

LI ZONGWANG

Techniques for correcting errors using iterative decoding

WESTERN DIGITAL TECHNOLOGIES INC

Read level tracking and optimization