ITC/USA 2008 Conference Proceedings / The Forty-Fourth Annual International Telemetering Conference and Technical Exhibition / October 27-30, 2008 / Town and Country Resort & Convention Center, San Diego, California / Modern telemetry systems require flexible sampling rates for analog signal conditioning within telemetry encoders in order to optimize mission formats for varying data acquisition needs and data rate constraints. Implementing a variable sample rate signal conditioning module for a telemetry encoder requires consideration of several possible architectural topologies that place different system requirements on data acquisition modules within the encoder in order to maintain adequate signal fidelity of sensor information. This paper focuses on the requirements, design considerations and tradeoffs associated with differing architectural topologies for implementing a variable sample rate signal conditioning module and the resulting implications on the encoder system's data acquisition units.

ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / Modern telemetry systems require flexible bit rate telemetry encoders in order to optimize mission formats for varying data rate requirements and/or signal to noise conditions given a fixed transmitter power. Implementing a variable bit rate telemetry encoder requires consideration of several possible architectural topologies that place different system requirements on data acquisition modules within the encoder in order to maintain adequate signal fidelity of sensor information. This paper focuses on the requirements, design considerations and tradeoffs associated with differing architectural topologies for implementing a variable bit rate encoder and the resulting implications on the encoder systems data acquisition units.

International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Given the small size of hit-to-kill interceptor test vehicles currently under development, volumetric limitations mandate using the experimental vehicle's telemetry system during vehicle ground level acceptance and environmental testing to gather performance data, in addition to the primary function of successfully gathering and transmitting data during the test flight. In small, lightweight test interceptors, volume and mass become major telemetry system design considerations. In this paper we describe a system engineering approach to determine the key requirements and calculate some of the critical design parameters necessary for the successful design and development of a high data rate wide band FM Pulse Code Modulation (PCM) airborne telemetry system.

International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / In this paper, a new concept in PCM telemetry encoding equipment is described. Existing "programmable" PCM encoders allow only simple changes in the functionality of the hardware, such as input gain, offset, and word formatting. More importantly, these encoders do not provide capability for "in-flight" processing of signals and in general have not taken advantage of existing hardware and software digital signal processing technology. In-flight processing of signals can provide a significant reduction in the required transmission bandwidth, allowing additional data that may not have otherwise been transmitted to be sent on the telemetry channel. A modular digital signal processor (DSP) based PCM encoder architecture is described that has a set of on-board processing algorithms configurable via a simple-to-use graphical user interface. Algorithms included are compression (lossy and lossless), Fourier transforms of various resolutions (typically followed by peak detection to provide a data rate reduction), extreme values (max, min, rms), time filtering, regression, trajectory prediction, and serial data stream processing. Custom algorithms can be developed and included as part of the suite of processing algorithms. The preprocessing algorithms exist as firmware on the DSPs and can accommodate as many different signals as the processing bandwidth of the DSP can handle. Typically one DSP can handle many input signals and different algorithms. The encoder is programmable via a standard RS-232 serial interface allowing the signal input configuration, telemetry frame layout, and on-board processing algorithms to be changed quickly.

<p>IPTV is a growing form of distribution for TV and media. Reports show that the market will grow from the current 20-30 million subscribers to almost 100 million 2012. IPTV extends the traditional TV viewing with new services like renting movies from your TV. It could also be seen as a bridge between the traditional broadcast approach and the new on demand approach the users are used to from internet.</p><p>Since there are many actors in the IPTV market that all deliver the same basic functionality, companies must deliver better products that separate them from the competitors. This can be done either through doing things better than the others and/or delivering functionality that others can’t deliver.</p><p>This thesis project presents the development of a prototype system for serving user generated content in the IPTV middleware Dreamgallery. The developed prototype is a fully working system that includes (1) a fully automated system for transcoding, of video content. (2) A web portal presented with solutions for problems related to user content uploading and administration. (3) Seamless integration with the Dreamgallery middleware and end user GUI, with two different ways of viewing content. One way for easy exploration of new content and a second more structured way of browsing the content.</p><p>A study of three open source encoding softwares is also presented. The three encoders were subjects to tests of: speed, agility (file format support) and how well they handle files with corrupted data.</p>

This bachelor degree project was carried out at Saab AB Service and Repair, Arboga, Sweden. The objective was to design, construct and implement a new stable and reliable method of measuring the continuous vertical displacement (height) of the military search radar PS861 mounted on a hydraulic powered elevator. The end product needs to be durable enough to be fully operational in the harsh environment of an outdoor elevator shaft and yet as accurate and precise as possible since one of its purposes is to calibrate control equipment. Previously used technique has proven not to meet any of the above mentioned properties. A prototype using a high resolution quadrature output rotary encoder has been developed, allowing a completely digital interface. This new method has been evaluated in laboratory environment where tests have been conducted regarding both reliability and validity. The tests show that the new digital system provides highly improved accuracy and precision and in addition to that, the sensor with its IP-64 classification ensures operation even in the worst conditions. The technology developed in this project is also versatile and may be used in other situations where rotational motions are to be measured. Real life tests have not yet been carried out, but future test results will determine whether the product will replace the old system or not.

In 2010, a donation was given to the University of Victoria Robotics and Mechanisms lab by Roper Industries. It was a Flight Telerobotic Servicer (FTS) Right Finger training tool. This is an electro-hydraulic robotic arm, approximately eight feet long, weighing in excess of four hundred pounds. This arm was designed and built in the late nineteen eighties as part of a program in support of the Space Station Freedom project. The intention of the arm was to assist in the training of astronauts in the use of an end effector which would be mounted at the distal end of the Canadarm©. The end effector would have right and left fingers, as well as a thumb (used for stabilization, not grasping). Unfortunately, the robot did not come with any of the control hardware, software, manuals, or functional descriptions, and the original equipment manufacturers (OEMs) were not able to share any information regarding the nature of the controls. The focus of the present work is to re-animate this arm without additional feedback, operating the arm only by hand-eye control, using currently available electronics and hardware. Also, investigate the absolute position sensors. These are described as near-infinite resolution analog absolute position sensors. Investigation was also conducted on an alternate solution (Vernier Optical Encoder), which was finally were abandoned. Strain-gauge type torque feedback sensors were found to be functional, and can be used without further work on future experimentation. The outcome of the research and assembly is a fully functional electro-hydraulic robotic arm, which is digitally controlled using an XBOX© game controller, using only visual feedback for position. The position sensor work was not as fruitful, with no working position sensors available. The torque feedback sensors are functional, but not utilized in the final work. / Graduate

Teleoperations is a significant field in robotics research; its applications range from emergency rooms in hospitals to space station orbiting the Earth to Mars rovers scavenging the red planet for microscopic life. We have developed a new user defined selective video object plane scheme. This selective filter works with standard H.264 encoder which is developed using Intel IPP and uses the latest multicore capabilities of new processors and can encode and transmit high definition videos over internet in real time. The area of interest is extracted and encoded at a different frame rate and noise level than rest of the frame. Our modified algorithm uses user input as well as motion detection of individual pixels to define video object plane. Video object plane filter is designed to be used for video with slow moving objects for cases like surgical procedures. The results of our compression algorithm have been verified using SSIM, PSNR and human perception survey. All these results of our VOP showed better performance than comparable encoders at the same bandwidth.

The final thesis deals with coders and voice coders used in speech signal processing. The aim is to create an integral overview of coders and voice coders including a description of their properties, in the second part of the thesis a simulation of algorithms and methods of speech processing is performed in Matlab Simulink program.The basic methods of speech processing and a parametric LPC voice coder were simulated in time domain. In the LPC voice coder model there are implemented the algorithms for obtaining speech segment parameters. These are the algorithm for classification of voiced and unvoiced speech segment, LPC analysis and pitch detection. The output is a parametric signal that enables a receiver to synthesize a speech signal. The appendix 1 contains a list of names of coders or standard numbers of coders and their properties, the appendix 2 includes an overview of speech processing methods.

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