To keep the levels constant you've done everything you can
think of. You've tried fixing the amplifier, and placed speakers in strategic
positions. However, you still couldn't reduce the eco. You can hear background sound
and response. To combat these sound excellence issues there is a simple
solution - DSP.
We take a look at some of the fundamentals of Digital Signal
Processing.
What is DSP?
Digital Signal Processors (DSP) take real-time signals like
audio, video, voice, temperature, location or pressures that are digitized and
then accurately man oeuvre them. It is designed for accomplishment of mathematical
functions like subtract, add, divide and multiply very quickly. DSP is a
programmable chip and is capable of carrying out millions of floating point
operations per second. Typical DSP application fields are audio signal
processing, video signal processing, image processing and telecommunications
devices. DSP is the base of many technologies. A signal is a part of
information in binary or digital form. Digital Signal Processing applications improve signal superiority or abstract important information by removing
unwanted parts of the signal.
How they work
Signals from real world sources are transformed by Digital
Signal Processing into digital data that can then be analyzed. The signals will
be usually in analog form. Study is performed in digital form because when we
reduce a signal to numbers its contrivance can be influenced in more depth than
when they are from real world sources.
The digital data can be transformed into an analog signal
with amplify quality when the DSP has completed its work. A DSP can magnify
frequencies, sort noise from a signal, and hold back others.
Categories of Audio Signal Processors
Signal processors can be single or multi-functional, digital
or analog, or incorporated with other components in a sound system. Most were
unconnected devices, but became multi-functional over time with digital signal
processors integrating a wide range of functions at a small of the cost of
individual processors.
The problem solving topographies in DSPs today are Gain
Control and Volume, Equalization, Filters, Compressors, Dynamics Processor,
Expanders and Noise Gates, Limiters, Speech Leveler, Delay, GA Mixers, Automatic
Microphone Mixers, etc.
Although you can find it everywhere it is an extremely
refined chip technology. DSP chips are used in fax machines, sound cards,
modems, high-capacity hard disks, cellular phones, and digital TVs. about 65%
of the world's digital cellular phones, DSPs are used as the engine. This
number will only increase with the increase in wireless applications. Digital
signal processing is used in many fields including music processing, sonar,
biomedicine, radar, speech, and seismology, communications and imaging.
Advantages
You need to consider some of the most common issues you face
in sound reinforcement to determine whether DSP can help your sound system. The
DSP tools can remedy many issues if you have reasonably good room acoustics. If
you have poor tone quality by using graphic equalizer, a DSP tool, you can
rectify the problem. Similarly, DSP tools like Downward Expander, Delay,
Compressor, and Automatic Mixer can rectify issues like unwanted noise, frequency
response issues, sound source too loud, and feedback, respectively.
Disadvantages
Adding DSP to your system isn't an alternative for subsequent
conventional sound support rules. For instance, audio processing will not
prevent echo. DSP has no effect once sound energy is released by the
loudspeaker. The problem will only become worse if you raise the level of the
sound system.
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