Search Results

The search returned 1,237 publication(s) on its.ntia.gov.

Stephen Wolf, “Tape Duplication and Traceability Process for ANSI T1.801.01-1996 (Test Scenes),” Technical Contribution, December 1995

Recommends a process to be used by ANSI for duplication and traceability of video tapes for ANSI T1.801.01-1996 (American National Standard for Telecommunications - Digital Transport of Video Teleconferencing/Video Telephony Signals - Video Test Scen...

Stephen Wolf, “Field Vs. Frame Calculations for Visual Channel Delay,” Technical Contribution, December 1995

This contribution recommends that calculations of visual channel delay be based on fields rather than frames for an interlaced video system such as NTSC. Using fields rather than frames will double the resolution of the measurement without significan...

National Telecommunications and Information Administration, “Land Mobile Spectrum Planning Options,” Special Publication NTIA SP-95-34, October 1995

The National Telecommunications and Information Administration (NTIA), under a mandate from Congress to develop long-range spectrum plans, initiated the Strategic Spectrum Planning Program. As part of this long-term planning effort, NTIA released a r...

Christopher L. Holloway, Patrick L. Perini, Ronald Delyser, and Kenneth C. Allen, “A study of the electromagnetic properties of concrete block walls for short path propagation modeling,” Technical Report NTIA TR-96-326, October 1995

For short propagation paths, correctly representing reflections of electromagnetic energy from surfaces is critical for accurate signal level predictions. In this paper, the method of homogenization is used to determine the effective material propert...

Stephen D. Voran, “Observations on Auditory Excitation and Masking Patterns,” Conference Paper, October 1995

Excitation patterns and masking patterns are used extensively in perceptual audio coders and quality assessment algorithms. Numerous algorithms for calculating these patterns have been proposed. This paper provides comparisons among the patterns gene...

Kenneth C. Allen et al., “Survey of Rural Information Infrastructure Technologies,” Special Publication NTIA SP-95-33, September 1995

Communication and information technologies can reduce the barriers of distance and space that disadvantage rural areas. This report defines a set of distinct voice, computer, and video telecommunication services; describes several rural information a...

Marjorie L. Weibel, “Data communication performance testing of ACTS,” Technical Report NTIA TR-95-320, September 1995

The results of a series of data communication tests, which define the digital end-to-end performance of the Advanced Communication Technology Satellite (ACTS), are presented. The experiment consisted of a test set characterization to determine the ef...

Frank H. Sanders and Vincent S. Lawrence, “Broadband Spectrum Survey at Denver, Colorado,” Technical Report NTIA TR-95-321, September 1995

NTIA is responsible for managing the Federal Government’s use of the radio spectrum. In discharging this responsibility, NTIA uses the Radio Spectrum Measurement System to collect data for spectrum utilization assessments. This report details such a ...

Nicholas DeMinco, “Engineering manual for the Jammer effectiveness model,” Technical Report NTIA TR-95-322, September 1995

This engineering manual describes a user–friendly and menu–driven computer program called the Jammer Effectiveness Model (JEM). The models used in JEM to analyze the effectiveness of a jammer in jamming a receiver/transmitter pair or network of recei...

John J. Lemmon and Peter B. Papazian, “Impulse Response Measurements Over Space-Earth Paths Using the GPS Coarse/Acquisition codes,” Technical Report NTIA TR-95-324, September 1995

The impulse responses of radio transmission channels over space-earth paths were measured using the coarse/acquisition code signals from the Global Positioning System of satellites. The data acquisition system and signal processing techniques used to...

Lynette H. Loew, Yeh Lo, Michael Laflin, and Elizabeth E. Pol, “Building Penetration Measurements from Low-Height Base Stations at 912, 1920, and 5990 MHz,” Technical Report NTIA TR-95-325, September 1995

Building penetration measurements were taken simultaneously at three potential Personal Communications Services (PCS) frequencies: 912, 1920, and 5990 MHz. The continuous wave (CW) measurement system employed a fixed outdoor transmitter and a mobile ...

Stephen D. Voran and C. Sholl, “Perception-based Objective Estimators of Speech Quality,” Conference Paper, September 1995

Four proposed perception-based techniques for objectively estimating speech quality and three traditional estimators are applied to coded speech samples. Agreement between objective estimates and corresponding subjective test scores is reported. Seve...

Martin J. Miles, “Performance Evaluation of Data Communication Services: NTIA Implementation of American National Standard X3.141, Volume 1. Overview,” Technical Report NTIA TR-95-319-1, August 1995

This is the first volume of this report. The six volumes of this report are: Volume 1. Overview; Volume 2. Experiment Design; Volume 3. Data Extraction; Volume 4. Data Reduction; Volume 5. Data Analysis; Volume 6. Data Display This volume is an ...

Martin J. Miles, “Performance Evaluation of Data Communication Services: NTIA Implementation of American National Standard X3.141, Volume 2. Experiment Design,” Technical Report NTIA TR-95-319-2, August 1995

This is the second volume of this report. The six volumes of this report are: Volume 1. Overview; Volume 2. Experiment Design; Volume 3. Data Extraction; Volume 4. Data Reduction; Volume 5. Data Analysis; Volume 6. Data Display This volume shows...

Martin J. Miles and David R. Wortendyke, “Performance Evaluation of Data Communication Services: NTIA Implementation of American National Standard X3.141, Volume 3. Data Extraction,” Technical Report NTIA TR-95-319-3, August 1995

This is the third volume of this report. The six volumes of this report are: Volume 1. Overview; Volume 2. Experiment Design; Volume 3. Data Extraction; Volume 4. Data Reduction; Volume 5. Data Analysis; Volume 6. Data Display This volume explain...

Kenneth P. Spies, “Performance Evaluation of Data Communication Services: NTIA Implementation of American National Standard X3.141, Volume 4. Data Reduction,” Technical Report NTIA TR-95-319-4, August 1995

This is the fourth volume of this report. The six volumes of this report are: Volume 1. Overview; Volume 2. Experiment Design; Volume 3. Data Extraction; Volume 4. Data Reduction; Volume 5. Data Analysis; Volume 6. Data Display This volume shows how...

Martin J. Miles, “Performance Evaluation of Data Communication Services: NTIA Implementation of American National Standard X3.141, Volume 5. Data Analysis,” Technical Report NTIA TR-95-319-5, August 1995

This is the fifth volume of this report. The six volumes of this report are: Volume 1. Overview; Volume 2. Experiment Design; Volume 3. Data Extraction; Volume 4. Data Reduction; Volume 5. Data Analysis; Volume 6. Data Display T This volume shows...

Christopher A. Bogart et al., “Performance Evaluation of Data Communication Services: NTIA Implementation of American National Standard X3.141, Volume 6. Data Display,” Technical Report NTIA TR-95-319-6, August 1995

This is the sixth volume of this report. The six volumes of this report are: Volume 1. Overview; Volume 2. Experiment Design; Volume 3. Data Extraction; Volume 4. Data Reduction; Volume 5. Data Analysis; Volume 6. Data Display This volume shows ho...

Michael G. Biggs, Frank H. Sanders, and Bradley J. Ramsey, “Measurements to Characterize Aggregate Signal Emissions in the 2400–2500 MHz Frequency Range,” Technical Report NTIA TR-95-323, August 1995

This report provides the results of radio spectrum measurements performed to characterize the aggregate signal emissions present in the 2400–2500 MHz industrial, scientific, and medical (ISM) band and adjacent frequency bands. These measurements were...

Stephen Wolf, “An Update on ITS Video Quality Parameters,” Technical Contribution, July 1995

Presents a summary of efforts to make the objective video quality metrics more efficient in terms of computation and transmission bandwidth. Objective to subjective correlation results are presented for the subjectively rated data set given in the 19...