Browsing International Telemetering Conference Proceedings, Volume 24 (1988) by Title
Now showing items 92-95 of 95
Video Compression Standardization IssuesThis paper discusses the development of a standard for compressed digital video. The benefits and applications of compressed digital video are reviewed, and some examples of compression techniques are presented. A hardware implementation of a differential pulse code modulation approach is examined.
Video Compression TechniquesThis paper will attempt to present algorithms commonly used for video compression, and their effectiveness in aerospace applications where size, weight, and power are of prime importance. These techniques will include samples of one-, two-, and three-dimensional algorithms. Implementation of these algorithms into usable hardware is also explored but limited to monochrome video only.
VLSI High Speed Packet ProcessorThe Goddard Space Flight Center Mission Operations and Data Systems Directorate has developed a Packet Processor card utilizing semi-custom very large scale integration (VLSI) devices, microprocessors, and programmable gate arrays to support the implementation of multi-channel telemetry data capture systems. This card will receive synchronized error corrected telemetry transfer frames and output annotated application packets derived from this data. An adaptable format capability is provided by the programmability of three microprocessors while the throughput capability of the Packet Processor is achieved by a data pipeline consisting of two separate RAM systems controlled by specially designed semi-custom VLSI logic.
Wideband High Performance Telemetry Tracking and Data Reception SystemA 5 meter diameter wideband polarization diversity Telemetry Tracking System has been developed for Eglin Air Force Base. A single solid state feed, with no moving parts, provides autotrack and data reception in the 1435-1540 MHz and 2200-2400 MHz bands. The system consists of three tracking antennas, each mounted on separate 75 foot high towers. The antennas feature continuous rotation capability in azimuth and remotely controlled stowing mechanisms. A common console containing test equipment, multicouplers, patch panels, RF switching, boresight source and control equipment is interfaced with the three (3) tracking antennas, receiver combiner systems, and boresite antenna. The complete system features total integration of state-of-the-art feed/RF, tracking, and control system electronics with a highly versatile sub-system of telemetry receivers, combiners, RF, and wideband high level video distribution equipment.