In signal processing, phase distortion or phase-frequency distortion is distortion, that is, change in the shape of the waveform, that occurs when a filter's phase response is not linear over the ...
Phase distortion results when different frequencies travel at different signal velocities due to dielectric dispersion in the PCB substrate. Because the dielectric constant varies with frequency, the signal velocity also varies with frequency.
Traditionally, most distortion units overdrive and shape the amplitude of a signal in various ways to generate a rougher sound. Phase Distortion instead lets the signal modulate the phase of itself, essentially resulting in something similar to feedback FM.
*Phase distortion happens when the phase response of the filter changes nonlinearly across the filter's passband frequency response. From: Digital Signal Processing 101, 2010.
Amplitude distortion refers to unequal amplification or attenuation of the various frequency components of the signal, and phase distortion refers to changes in the phase relationships between harmonic components of a complex wave.
Frequency distortion occurs when the amplitudes of the different frequency components of an input signal are changed by a factor that is not the same for all frequencies. Phase distortion occurs when there is a phase shift between a system's output- and its input-signal components.
Two common types of distortion. In barrel distortion (left), magnification decreases with distance from the centre of the image; in pincushion distortion (right), magnification increases with distance.
In audio systems, the most noticeable types of distortion are amplitude, frequency, and intermodulation. In video systems, appreciable distortion of any kind may be observed as a degradation of the reproduced image. Noise added to a signal, either purposely or inadvertently, is sometimes referred to as distortion.
The three main reasons for signal distortion in transmission impairment are environmental parameters, properties of the transmission medium, and distance between the transmission end and receiving end.
The signal received may differ from the signal transmitted. The effect will degrade the signal quality for analog signals and introduce bit errors for digital signals. There are three types of transmission impairments: attenuation, delay distortion, and noise.
Two sound waves of the same frequency that are perfectly aligned have a phase difference of 0 and are said to be “in phase.” Two waves that are in phase add to produce a sound wave with an amplitude equal to the sum of the amplitudes of the two waves. This process is called “constructive interference.”
Phase in audio refers to the position of a sound wave in time. Think of a sine wave on a graph. The wave's phase is its position along the x-axis. For a periodic waveform, the phase tells you the point along its shape where the wave's pattern begins.
One of the most common causes of phase problems comes from recordings of the same source made with two or more mics placed at different distances. The distance variations cause the sound to arrive at the mics (and therefore get recorded) at slightly different times.
In communications and electronics it means the alteration of the waveform of an information-bearing signal, such as an audio signal representing sound or a video signal representing images, in an electronic device or communication channel.
1. : the act of twisting or altering something out of its true, natural, or original state : the act of distorting. a distortion of the facts. 2. : the quality or state of being distorted : a product of distorting: such as.
Phase Distortion in the amplifier is also known as delay distortion. As the name indicates whenever there is a time delay between input and occurrence of the signal at the output. It is said to be phase distorted signal. It occurs mainly due to electrical reactance.
When positions on the graticule are transformed to positions on a projected grid, four types of distortion can occur: distortion of sizes, angles, distances, and directions. Map projections that avoid one or more of these types of distortion are said to preserve certain properties of the globe.
Distortion refers to the altering or deformation of an audio signal's original waveform. Technically, any kind of audio processing (EQ, compression, time-based effects, etc.) alters an audio signal, but in audio production, the term is used to describe either intentional or undesired sonic destruction.
Her face was distorted by pain. The odd camera angle distorted her figure in the photograph. The sound of the guitar was distorted. Heat caused the plastic to distort.
Signal distortion is not usually significant for lengths less than 30 feet (or 1000 picofarads). To minimize the distortion, use low capacitance cable (less than 30 picofarads per foot), in the shortest length possible for the application.
Harmonic distortion may be measured by looking at the output spectrum on a spectrum analyzer and observing the values of the second, third, fourth, etc., harmonics with respect to the amplitude of the fundamental signal. The value is usually expressed as a ratio in %, ppm, dB, or dBc.
The only way to solve these problems is to work in the linear range for all components and enforce impedance matching. Component manufacturing imperfections, and roughness on microstrip and stripline traces, are also responsible for nonlinear distortion at mmWave frequencies.
Distortion and overdrive are forms of audio signal processing used to alter the sound of amplified electric musical instruments, usually by increasing their gain, producing a "fuzzy", "growling", or "gritty" tone.
Technically distortion is ANY deviation in the shape of an audio waveform between two points in a signal path. Given that understanding, just about any audio process (equalization, compression) are all forms of distortion.