An algorithm which reduces undesirable frequencies in the signal.
a basic building block in any Digital Signal Processing (DSP) sys-tem
a computer program, typically running in a Digital Signal Processor (DSP) at high enough speed to process audio one sample at a time
a device that outputs a signal where each sample is given by a linear combination of past and present input samples and past output samples (assuming we want to restrict the discussion to causal systems)
a linear combination of the input data and possibly the output data
an algorithm for processing digitalsignals , which may be implemented in software , by a dedicated digital circuit , or a digital signal processor
an algorithm for processing numeric data, and which can also be used in digital signal processors to function in a similar way to an electronic filter
an electronic filter implemented in a digital computer and, thus, in discrete time
Software configured filters that are used to condition digitized signals utilizing DSP's (Digital Signal Processor's) or hardware structures such as certain types of Gate Arrays. These structures can be configured to mathematically manipulate digital data to provide the equivalent of analog filters or to produce filters not realizable in the analog world.
A process which employs electronic circuits to modify or selectively transmit digital signals in a manner analogous to that of photographic filters acting upon light.
A filter (usually linear), in discrete time, that is normally implemented through digital electronic computation.
A filter which acts on the data after it has been sampled and digitized. Often used in DSAs to provide antialiasing protection before internal re-sampling.
An algorithm operating upon a sequence of discrete-time sampled data, designed to pass signals with selected temporal or spatial frequencies while attenuating signals with other temporal or spatial frequencies. Such filters are often used to pass desired signals while suppressing noise or interfering signals. Common types are low-pass filters, which suppress high-frequency energy; high-pass filters, which reject low-frequency energy; and bandpass filters, which reject low- and high-frequency energy, and pass only a limited range of frequencies in between.
A filter that's implemented digitally. A digital filter accepts digital inputs (typically samples read from an A/D converter) and produces digital outputs. The data is processed in firmware running on a DSP. [ more
In electronics, a digital filter is any electronic filter that works by performing digital mathematical operations on an intermediate form of a signal. This is in contrast to older analog filters which work entirely in the analog realm and must rely on physical networks of electronic components (such as resistors, capacitors, transistors, etc.) to achieve the desired filtering effect.