Search Results
The search returned 1,237 publication(s) on its.ntia.gov.
Discusses the standardization of user-oriented, technology-independent measures of telecommunication service quality, including voice, video, and data performance standards. Standards committee work has progressed in three broad phases. In the first ...
The Institute for Telecommunication Sciences (ITS) is the research and engineering laboratory of the National Telecommunications and Information Administration (NTIA) of the U.S. Department of Commerce (DOC). ITS provides technical support to NTIA in...
This report is an introduction to wavelet theory intended for the technical professional working in telecommunications. The basics of wavelet theory are presented with an emphasis on explanation of the principles and ideas involved rather than on the...
Summarizes detailed methods of measurement for two objective video quality parameters based on the Fourier transform image. This contribution was submitted to ANSI T1A1 prior to conducting the T1A1 subjective experiment (this experiment collected 625...
Summarizes detailed methods of measurement for objective video quality parameters based on the Sobel-filtered image and the motion difference image. This contribution was submitted to ANSI T1A1 prior to conducting the T1A1 subjective experiment (this...
Working Group T1A1.5 is supporting ITU-T Study Group 12 in developing subjective audiovisual testing methods under Question 22/12 which addresses audiovisual quality in multimedia services. A previous contribution from Bellcore, T1A1.5/93-104, descri...
Propagation characteristics of the atmosphere are modeled for the frequency range from 1 to 1000 GHz (1 THz) by the modular millimeter-wave propagation model MPM. Refractivity spectra of the main natural absorbers (i.e., oxygen, water-vapor, suspend...
Automatic Link Establishment (ALE) technology automates the selection of channels and establishment of links among high-frequencyradios, but creates a vulnerability in such automated networks to hostile manipulation of network operations. The Linkin...
The National Telecommunications and Information Administration (NTIA) in the fall of 1992 was required by Congress to develop and commence implementation of a plan for Federal agencies to use wireless mobile technologies that are spectrum efficient a...
The Digital Emission Spectrum Model report was released in September 1993. A computer program was developed to calculate the power spectral density (PSD) and the fractional power containment bandwidth for various digital modulation techniques. The p...
Impulse response measurements were taken simultaneously in both the 902–928 and 1850–1990 MHz bands using a wideband measurement system consisting of a fixed transmitter and a mobile receiver. Four different macrocells representing typical semi-rural...
Discusses a real-time personal computer-based system for characterizing spatial (e.g., blurring) and temporal (e.g., jerky motion) distortions in a compressed digital video system. Comparisons with a high quality non real-time laboratory version of t...
This report presents an analysis and explanation of the system performance calculations performed by the reliability and service probability subroutines of the Ionospheric Communication Analysis and Prediction Program “IONCAP” and an IONCAP derivati...
The present analysis extends the concepts and approaches discussed in [1] and [2] for determining the effective erasure or overwrite of signals on magnetic tapes, as part of a general approach to the development of new, statistical standards for thi...
Measurements that quantify perceptual video attributes in both the spatial and temporal domains are extracted from the video that has undergone digital coding and compression. These measurements are then used to compute a single score that quantifies...
This study includes a description of the services provided in about 30 of the Government and non-Government frequency bands where Fixed services are accorded Primary status. These frequency bands between 406 MHz and 30 GHz include the services gener...
The purpose here is to define the present and examine the future of telecommunications over the next ten years. Emerging and anticipated products and services are viewed from both a technical and a social impact perspective. Systems including those p...
A user's guide and programmer's reference manual is presented to facilitate the use of two high frequency circuit analysis software systems called VOACAP and REC533. The guide shows how to execute the software on laptop computers and personal compute...
The objectives of this report are (1) to identify and examine various divergent perspectives that exist about the technology termed network management; (2) to develop a conceptual definition and understanding of network management that is rational an...
The Federal Government Spectrum Usage in the 902–928, 2400–2500 and 5725–5875 MHz Bands report was released in February 1993. This report assesses the Federal Government spectrum usage of these three bands. Current rules and regulations, allocations,...