- 産業: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A meter used to measure, calculate, and display the ratio of the peak power level to the time-averaged power level in a circuit, i.e., the peak-to-average ratio (p/a r. ) Note 1: A par meter is used as a quick means to identify degraded telephone channels. Note 2: A par meter is very sensitive to envelope delay distortion. The par meter may also be used for idle channel noise, nonlinear distortion, and amplitude-distortion measurements. Note 3: The peak-to-average ratio can be determined for many signal parameters, such as voltage, current, power, frequency, and phase.
Industry:Telecommunications
A method for distributing trusted computing base (TCB) hardware, software, and firmware components that protects the TCB from modification during distribution.
Industry:Telecommunications
A method of accessing and retrieving FTP-based files via e-mail.
Industry:Telecommunications
A method of checking the accuracy of transmission of data by sending received data back to the sending end for comparison with the original data that have been stored there for this purpose.
Industry:Telecommunications
A method of combining two or more digital signals that have mutually independent pulses, thus avoiding intersymbol interference.
Industry:Telecommunications
A method of data restoration by analyzing original sources.
Industry:Telecommunications
A method of data restoration by assembling data from components available from alternative sources.
Industry:Telecommunications
A method of digitally encoding analog signals, which method uses a single-level or multilevel sampling system in which the value of the signal at each sample time is predicted to be a linear function of the past values of the quantized signal. Note: LPC is related to adaptive predictive coding (APC) in that both use adaptive predictors. However, LPC uses more prediction coefficients to permit use of a lower information bit rate than APC, and thus requires a more complex processor.
Industry:Telecommunications
A method of electrically interconnecting circuits by using back-to-back modems.
Industry:Telecommunications
A method of encoding information for digital transmission in which (a) a binary 0 is encoded as a +90° change in the carrier phase and a binary 1 is encoded as a -90° change in the carrier phase, and (b) abrupt phase transitions are smoothed by filtering or other functionally equivalent pulse shaping techniques.
Industry:Telecommunications
