Codex Corporation

About: Codex Corporation is a based out in . It is known for research contribution in the topics: Network packet & Signal. The organization has 189 authors who have published 241 publications receiving 32205 citations.

Detection of fatal transient impairments using an embedded secondary channel

Abstract: It is desirable for voiceband data communication equipment to have an efficient transient channel impairment detector for fast recovery. One such detector is proposed for high-speed modems using a secondary channel synchronously embedded in the main channel. A known code word being multiplexed with the secondary port data is sent through the embedded secondary channel. The received code word is tested for detection of fatal transient impairments. For reliable detection, the confirmation is sequentially performed based on a modified up/down counter scheme. The performance of the proposed detector is analytically evaluated in closed form. >

Novel device and method for precoding

Abstract: New device (100) and technique (900) for precoding a transmit signal point stream on a channel h (D) to ensure the efficient transfer of data in the presence of intersymbol interference and noise under conditions of flow rates data near the channel flow capacity. This new technique can be combined with the modulation coded by lattice works and with any constellation signals. In addition, this invention allows to decouple signal constellation shaping and therefore represents a significant improvement over the prior art precoding techniques. This invention simplifies the layout and allows to transmit signals to the fractional flow rates without switching the constellation.

A phase lock loop

Abstract: The invention relates to A phase lock loop, comprising: first means (12) for comparing a phase difference of first and second input signals and generating first and second control signals; a charge pump (14) responsive to said first and second control signals for charging and discharging a loop node; a VCO (20) having a control input, a bias input and an output, said control input being coupled to said loop node, said output providing an oscillator signal; second means (24) for dividing down said oscillator signal into said second input signal to said first means; and third means (26) coupled for receiving said first and second control signals from said charge pump and selecting one bias transistor pair in a plurality of bias transistor pairs for generating a continuous bias control voltage as set by said one bias transistor pair to said bias input of said VCO upon detecting a predetermined number of consecutive first control signals or consecutive second control signals.

Monitoring inmate movement with facial recognition

Abstract: The disclosure relates to systems and methods for automating offender documentation with facial or other recognition technique. A method can include generating, by cameras situated about a correctional facility, pixel data including first pixels corresponding to a face of a first offender in the correctional facility and an environment around the first offender corresponding to a location within the field of view of the camera, and providing, to a server, the pixel data from the cameras through a network connection, and receiving, from the server, an alert that, based on facial recognition and location detection analysis performed on the pixel data by the server, indicates a monitoring rule associated with the first offender is violated, an offender identification associated with the first offender, a location of the first offender in the correctional facility, and an indication of the monitoring rule violated.