Mitsubishi Electric Research Laboratories, Inc.

Mitsubishi Electric Information Technology Center America, Inc.

Mitsubishi Electric Information Technology Center

Misubishi Electric Information Technology Center America, Inc. (Ita)

Richard C Waters

David B Anderson

Ramesh Raskar

John W Barrus

Ronald N Perry

Dong Tian

Larry D Seiler

Hassan Mansour

Scott Bortoff

Jay E Thornton

Mouhacine Benosman

Rui Ma

Paul H Dietz

Christopher Laughman

Andrei Kniazev

Daniel J Burns

Thouis R Jones

Mamoru Kato

Chouaib Kantana

Franklin J Russell, Jr

Yves Schabes

Akshay Gadde

William Stephen Yerazunis

An auto-tuning controller for improving a performance of a power amplifier system is provided. The controller includes an interface including input terminals and output terminals, the interface being configured to acquire input signal conditions of power amplifiers (PAs), a training circuit including a processor and a memory running and storing a Digital Doherty amplifier (DDA) controller (module), a DPD controller (module) and a DDA-DPD neural network (NN). The training circuit is configured to perform sampling the input signal conditions, and selecting a DPD model from a set of polynomial models for the DPD controller and a set of DDA optimization variables for the DDA controller, using optimized DPD model and DDA coefficients, wherein the optimized DPD model and DDA coefficients are provided by performing an offline optimization for the DPD model and DDA coefficients based on a predetermined optimization method, collecting the optimized DPD coefficients and optimized DDA optimization variables, generating online-DDA optimal coefficients and DPD optimal coefficients using a trained DDA-DPD NN, and updating the generated optimal DDA and DPD coefficients via the output terminals of the interface.

Deep learning-based online adaptation of digital pre-distortion and power amplifier systems

A branch controller operates with a system for temperature and humidity control. The branch controller includes a fluid control system for controlling a flow of the liquid desiccant in an arrangement of channels forming a first path for exchanging the liquid desiccant between a liquid desiccant conditioning unit and at least a first space conditioning unit and a second path for directing the liquid desiccant received from the first space conditioning unit to a second space conditioning unit. The branch controller includes a processor for comparing operational conditions of the first space conditioning unit and the second space conditioning unit. The processor selects between the first path and the second path based on the comparison and commands the fluid control system to control the flow of the liquid desiccant according to the selected path.

System and method for controlling temperature and humidity in multiple spaces using liquid desiccant

A method reconstructs a signal by sampling the signal using a sampling procedure to obtain an input signal. A consistent set is determined from the input signal including the first elements such that applying the sampling procedure to the first elements results in the input signal. According to the type of the signal, a guiding set is determined including second elements disjoint from the first elements. A reconstruction set including third elements is generated so that the third elements minimize a sum of a first similarity measure of the third elements to the second elements and a second similarity measure of the third elements to the first elements. A transformed signal that minimizes a function on the reconstruction set is determined. A reconstructed signal is rendered so that a third similarity measure of the reconstructed signal to the transformed signal is smaller than a tolerance.

Method and system for reconstructing sampled signals

In a rear projection television, cathode ray tubes are mounted inside an enclosure so that each cathode ray tube projects output images onto a rear projection screen using a corresponding electron beam. Calibration images are generated for each cathode ray tube. A camera, also mounted inside the enclosure, acquires an input image of each calibration image. A distortion in each input image is measured, and the output images of the cathode ray tubes are corrected by adjusting the signals controlling the corresponding electron beams according to the distortion.

Self-correcting rear projection television

An automatic indicator system directs a light beam at an object. A camera configured to acquire an image of an object is coupled to a light beam indicator. The image is compared with representations of objects stored in a database. A matching representation is identified and the light beam is directed at the object based on information associated with the matching representation.

Automatic indicator system and method

A system for adjusting delivery of sound to loudspeakers in a home theater includes a plurality of loudspeakers located in an area. The loudspeakers are coupled to a sound generating source. A camera is oriented to acquire images of the area. An image processing system and controller is coupled to the camera and the sound generating source. Image processing system identifies the positions of the speakers and a position of the listener in the area from the images. The controller adjusts the deliver of the sound according to the relative positions of the loudspeakers and the listener.

Video camera controlled surround sound

A situation awareness system includes a plurality of cameras. Each camera acquires a sequence of images of a particular part of an area of interest. There is overlap between the parts so that the system can obtain depth information about objects in the area of interest. An analyzer identifies moving objects in the areas of interest, attributes of the moving objects, and events related to the moving objects. A display device displays the attributed objects and events as annotated graphic elements and alerts.

Situation awareness system

In a method for rendering an evolving three-dimensional scene description as a series of two-dimensional images (frames), the evolving scene description includes object geometries G and their associated shader procedures S. Each shader procedure S is factored into a static procedure S and a dynamic procedure S such that S(A,I)&equals;S (S (A,R),I), where A denotes the appearance parameters required to shade objects, I denotes an instance of the control parameters, and R denotes a range of control parameters which include I. Similarly, the rendering procedure TSI (transform, sample, and interpolate) for object geometry is factored into a static procedure TSI and a dynamic procedure TSI such that TSI(G,I)&equals;TSI (TSI (G,R),I). The factorization of both S and TSI is chosen to significantly reduce the overall rendering time for the evolving scene. Specifically, viewpoint independent or weakly viewpoint dependent computations S (A,R) and TSI (G,R) are computed in the static phase of rendering and stored either as independent data structures or as a single combined data structure called the internal representation. This internal representation is then processed by the dynamic phase of rendering to produce each frame. Since the required dynamic computations to produce a frame are significantly reduced and the required static computations run infrequently both as a result of a clever factorization and an efficient internal representation, the overall rendering time is reduced.

Method and apparatus for multi-phase rendering

A system for fast, efficient and reliable communication of object state irmation among a group of processes combines the use of a fast, but lossy and thus unreliable communications channel to the group of processes and a server coupled to the group for providing data which has been lost in the multicasting. In one embodiment, a central server supports reliability and rapid joining while using UDP multicast messaging to achieve rapid interaction and low bandwidth. Differential messages are sent over the lossy channel to compactly describe how to compute the new state of an object from any of several previous states. Such a description can be interpreted even if some number of prior descriptions were not received, greatly reducing the need for explicit, round-trip message repairs while also conserving bandwidth. In one embodiment, the central server communicates with each member of the group over a reliable channel to robustly detect and repair objects affected by lost messages.

System for the reliable, fast, low-latency communication of object state

In a multicast environment in which large-scale virtual environments are lt using locales and in which data from non-neighboring locales is ignored to minimize computation and local storage, a system is provided to find or track objects and their associated locales for locales to which a user is not listening by assigning the object a beacon and broadcasting the beacon in a subspace channel, with the beacon having the multicast address of the locale in which the sought-after object resides, thus to permit an upload of data from the particular locale. Beacons are doled out parsimoniously to objects one wants to find and objects one wants other people to find to minimize processing and data storage requirements. Ignored locales are thus located using a beacon broadcast in a subspace channel which in addition to broadcasting messages about itself to the locale it is in, also broadcasts messages into a subspace channel to others about itself and the multicast address of the locale it is in. In one embodiment, subspace channel information permits accessing non-neighboring locales which would normally be ignored due to the fact that they are not neighboring. Thus the beacon system permits keeping track of all objects possessing a beacon regardless of the locales in which they reside and regardless of whether or not the locales in which they reside are being accessed, such that objects are not lost due to the ignoring of locales by the multicasting system.

Beacons for locales

A system is provided for eliminating time-consuming, unnecessary transfers f data over networks such as the the World Wide Web while at the same time guaranteeing timeliness of the data used by recipients. Timeliness is assured by immediately sending small data-notification messages whenever data becomes relevant or changes. Efficiency is guaranteed by transmitting the data itself only when requested by the recipient of a data-notification message. In particular, recipients are alerted to the presence of, and changes in, data they might use by data-notification messages containing a timestamp, the data location, and a checksum. Based on the timestamp, the recipient can determine whether the data-notification message contains timely information or should be ignored. Based on the data location and checksum, the recipient can determine whether it already has the current version of the data in question, for example stored in a cache.

System for sending small positive data notification messages over a

A system assures smooth motion in a distributed virtual reality environment y categorizing the information to be transmitted as to the predictability of future motion and applying appropriate smoothing algorithms based upon knowledge of what the future motion is likely to be. The system switches between a linear interpolation algorithm for less predictable data and a Catmull-Rom spline for more predictable data.

Method for smooth motion in a distributed virtual reality environment

A system for virtual environments in which graphical objects are depicted in a space to achieve the required high accuracy regardless of location through establishing locales or subdivisions of the global coordinate system and establishing an origin for each locale, such that the specification of position and movement of a graphical object in the locale can be made with greater precision than using a global coordinate system, thus eliminating the need for high-precision floating point processors or emulation. The system permits designers of virtual environments to work independently on their locales, with overlap being controlled through specifying distance between locale origins as well as relative orientation between the locales. The system also permits ignoring information from non-relevant distant locales to, minimize processing and network bandwidth requirements.

System for designing a virtual environment utilizing locales

An all-audio, hands-free and eyes-free interactive tutor provides time-efficient and reduced-boredom instruction by varying a course of instruction based on the correct and incorrect responses of the user so as to frequently repeat and provide positive feedback for poorly-learned items of knowledge, to periodically refresh well-learned items and to suggest that rest be taken or to switch to easier material whenever too many human errors have occurred. The audio interactive tutor includes an audio input module, in the preferred embodiment a voice recognition unit based on a finite state grammar, an audio output module, a course of study and a user model. In a preferred embodiment, the course of study provides for human error control as well as for voice recognition unit error control, which synergistically cooperate to render the tutor substantially fault-tolerant and therewith enables the employment of commercially-available but not excessively accurate voice recognition units. The tutor may be embodied to operate on a PC or workstation, or may be embodied to operate as a stand-alone tutor. Spanish language instruction is disclosed in an exemplary embodiment.

Audio interactive tutor

A system is provided for dramatically decreasing the time required to parse a sentence by automatically converting a context-free grammar into a lexicalized form called lexicalized context-free grammar (LCFG) which is used in the parsing process. Lexicalized context-free grammar employs adjoining but, to decrease parsing time, only allows non-wrapping adjoining. The lexicalized context-free grammar is parsed using a parser that decreases parsing time by filtering the grammar based on the words in a sentence and maintaining the valid prefix property while parsing.

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Concord, MA, United States of America

Richard C Waters