Keith Hazelet

Title: Innovations of Keith Hazelet

Introduction

Keith Hazelet is an accomplished inventor based in Chandler, AZ. He has made significant contributions to the field of digital systems, holding a total of 3 patents. His work primarily focuses on enhancing data transmission techniques in multi-stream digital environments.

Latest Patents

One of Hazelet's latest patents is titled "Backpressure techniques for multi-stream CAS." This invention discloses methods for controlling data transmission in multi-stream digital systems. The techniques allow an input stream to a conditional access system to be throttled when a FIFO begins to fill up. Each data stream may have its own FIFO, which sends data to a multiplexer (MUX) and exports its status to a backpressure rate control module. Multiple seconds' worth of data may be stored in a backpressure rate control (BPRC) buffer ahead of the backpressure rate control module prior to being transmitted to a MUX FIFO buffer. The backpressure rate control module may use the cached data to fill available spaces within a MUX FIFO buffer. The determination to forward a data packet may be based on the individual MUX FIFO buffer levels, the sum of all the MUX FIFO buffer levels, and/or one or more configurable threshold values. In some embodiments, individual thresholds may be assigned to each FIFO buffer.

Another notable patent is "Clock recovery using remote arrival timestamps." This invention provides methods and systems for a sink module that receives packets from a source module, wherein each packet has a source timestamp corresponding to a source module packet arrival time. A reference timestamp may be associated with the source timestamp of the most recent packet having a program clock reference. A sink counter may be synchronized to a broadcaster transmit counter based on a current source timestamp and the reference timestamp. The sink counter and the source counter may be driven by asynchronous clocks, wherein the current source timestamp may be inferred based on the current value of the source counter. The packets may include video data and/or audio data. The sink counter may be synchronized by adjusting the frequency of a source clock and/or adjusting the sink counter.

Career Highlights

Keith Hazelet is currently employed at Intel Corporation, where he continues to innovate and develop advanced technologies. His work has significantly impacted the efficiency and reliability of data transmission in digital systems.

Collaborations

Hazelet has collaborated with notable colleagues, including Shanj