sampling frequency
Noun: 1. (Telecommunications, Signal Processing): The rate at which samples of a continuous analog signal are taken per unit of time (usually per second) to convert it into a digital signal. It is measured in hertz (Hz). A higher sampling frequency allows for a more accurate digital representation of the original signal.
The term "sampling frequency" is used to specify the technical parameter that defines how often an analog signal is measured during the analog-to-digital conversion process. * The audio CD standard uses a sampling frequency of 44.1 kHz. * To accurately capture the signal, the sampling frequency must be at least twice the highest frequency present in the analog signal. * Increasing the sampling frequency generally improves the quality of the digitized recording.
- Nyquist-Shannon Sampling Theorem: This fundamental theorem states that to perfectly reconstruct a signal, the sampling frequency must be greater than twice the maximum frequency (bandwidth) of the signal being sampled. This minimum required rate is called the Nyquist rate.
- Aliasing: If the sampling frequency is too low (below the Nyquist rate), a distortion artifact called aliasing occurs, where high-frequency components of the signal appear as lower frequencies in the digital output.
- Sample Rate (n): A common synonym for "sampling frequency."
- Sampling Rate (n): A common synonym for "sampling frequency."
- Nyquist Frequency (n): Defined as half the sampling frequency. It represents the maximum frequency that can be uniquely represented at a given sampling rate.
- Undersampling (n): The process of sampling a signal at a rate lower than the Nyquist rate, often intentionally to achieve specific effects in signal processing.
- Oversampling (n): The process of sampling a signal at a rate significantly higher than the Nyquist rate, often used to improve performance or simplify filtering.
- Sample Rate
- Sampling Rate
- To set the sampling frequency: To define or choose the rate.
- You need to set the sampling frequency in the software before you begin recording.
- To increase/raise the sampling frequency: To use a higher rate.
- For high-fidelity audio, we increased the sampling frequency to 96 kHz.
- To be limited by the sampling frequency: To have a constraint defined by the rate.
- The reproducible frequency range is limited by the sampling frequency of the system.
- (telecommunication) the frequency of sampling a continuously varying signal