Digital signal (signal processing)
In the context of digital signal processing (DSP), a digital signal is a discrete time, quantized amplitude signal. In other words, it is a sampled signal consisting of samples that take on values from a discrete set (a countable set that can be mapped one-to-one to a subset of integers). If that discrete set is finite, the discrete values can be represented with digital words of a finite width. Most commonly, these discrete values are represented as fixed-point words (either proportional to the waveform values or companded) or floating-point words.
- Comment
- enIn the context of digital signal processing (DSP), a digital signal is a discrete time, quantized amplitude signal. In other words, it is a sampled signal consisting of samples that take on values from a discrete set (a countable set that can be mapped one-to-one to a subset of integers). If that discrete set is finite, the discrete values can be represented with digital words of a finite width. Most commonly, these discrete values are represented as fixed-point words (either proportional to the waveform values or companded) or floating-point words.
- Depiction
- Has abstract
- enIn the context of digital signal processing (DSP), a digital signal is a discrete time, quantized amplitude signal. In other words, it is a sampled signal consisting of samples that take on values from a discrete set (a countable set that can be mapped one-to-one to a subset of integers). If that discrete set is finite, the discrete values can be represented with digital words of a finite width. Most commonly, these discrete values are represented as fixed-point words (either proportional to the waveform values or companded) or floating-point words. The process of analog-to-digital conversion produces a digital signal. The conversion process can be thought of as occurring in two steps: 1. * sampling, which produces a continuous-valued discrete-time signal, and 2. * quantization, which replaces each sample value with an approximation selected from a given discrete set (for example, by truncating or rounding). It can be shown that an analog signal can be reconstructed after conversion to digital (down to the precision afforded by the quantization used), provided that the signal has negligible power in frequencies above the Nyquist limit and does not saturate the quantizer. Common practical digital signals are represented as 8-bit (256 levels), 16-bit (65,536 levels), 24-bit (16.8 million levels), and 32-bit (4.3 billion levels) using pulse-code modulation where the number of quantization levels is not necessarily limited to powers of two. A floating point representation is used in many DSP applications.
- Hypernym
- Signal
- Is primary topic of
- Digital signal (signal processing)
- Label
- enDigital signal (signal processing)
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- 16-bit
- 24-bit
- 32-bit
- 8-bit
- Analog-to-digital conversion
- Category:Digital signal processing
- Companded
- Countable
- Digital signal processing
- Discrete set
- Discrete time and continuous time
- File:Digital.signal.discret.svg
- File:Discrete cosine.svg
- Fixed-point arithmetic
- Floating point
- Floating-point
- Injective function
- Integer
- Linear function
- Nyquist limit
- Power of two
- Pulse-code modulation
- Quantization (signal processing)
- Sampling (signal processing)
- Saturation arithmetic
- Signal (electrical engineering)
- Word (computer architecture)
- SameAs
- 2PDSt
- Q25345908
- Дигитален сигнал (обработка на сигнали)
- Цифровий сигнал (обробка сигналів)
- Subject
- Category:Digital signal processing
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- WasDerivedFrom
- Digital signal (signal processing)?oldid=1119510454&ns=0
- WikiPageLength
- 4557
- Wikipage page ID
- 47577590
- Wikipage revision ID
- 1119510454
- WikiPageUsesTemplate
- Template:Digital electronics
- Template:For
- Template:Reflist
- Template:Short description
