Inventor

WILLIS DONALD HENRY

US72 patents

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

WILLIS DONALD HENRY

THOMSON LICENSING SA

Digital video processing and interface system for video, audio and ancillary data

Data buffer management to enable apparent simultaneous record and playback from a rewritable digital disk

Record during pause and playback with rewritable disk medium

Method and system for contouring reduction

Random picture decoding

Picture decoding for trick mode operation

Reverse trick modes on non-progressive video using special groups of pictures

Low bit rate compression format conversion for improved resolution

Replay bit stream searching

Reduction of gamma correction contouring in liquid crystal on silicon (LCOS) displays

Optimizing display of progressive frame signals up converted to interlaced signals

User selectable variable trick mode speed

Controlled data flow

Apparatus for sampling and displaying an auxiliary image with a main image

Apparatus for sampling and displaying an auxiliary image with a main image to eliminate a spatial seam in the auxiliary image

Method and apparatus for sparkle reduction by reactive and anticipatory slew rate limiting

Pulse width modulated display with hybrid coding

Precessed recording for rewritable disk medium

Transducer repositioning

THOMSON LICENSING

Pixel shifting color projection system

Fast motion trick mode using dummy predictive pictures

Method for converting packetized video data and corresponding navigation data into a second data format

User interface and processing system for digital video, audio and ancillary data

Trick modes using non-progressive dummy bidirectional predictive pictures

Eliminating picture format artifacts in MPEG trick modes

Pulse width modulated display with equalized pulse width segments

Frame rate multiplier for liquid crystal display

Anticamcorder media projection using enhanced frame rate

Fast motion trick mode using non-progressive dummy predictive pictures

Reducing sparkle artifacts with post gamma correction slew rate limiting

Forward trick modes on progressive video using special groups of pictures

Sequential display system with changing color order

Pulse width modulated display with improved motion appearance

Trick mode using dummy predictive pictures

Flicker reduction by display polarity interleaving

Reverse trick modes on progressive video using special groups of pictures

Fast motion trick mode using dummy bidirectional predictive pictures

RCA CORP

High voltage protection circuit having predictable firing point

Thrush current start-up circuit for a television receiver including a start-up decoupling circuit

Circuit for maintaining operating point stability of an amplifier

D.C. reinsertion in video amplifier

Gullwing distortion corrected deflection circuitry for a square-planar picture tube

Horizontal deflection circuit with high voltage selection capability

Gating circuit for a video driver including a clamping circuit

THOMSON CONSUMER ELECTRONICS

Memory control in trick play mode

Reduction of visibility of spurious signals in video

Digital video picture and ancillary data processing and storage

Apparatus for sampling and displaying an auxiliary image with a main image to eliminate a spatial seam in the auxiliary image during freeze frame operation

Apparatus for symmetrically reducing N least significant bits of an M-bit digital signal

THOMSON LINCENSING

Method and system for MPEG chroma de-interlacing