Audio Signal Processing

Audio signal processing, sometimes referred to as audio processing, is the intentional alteration of auditory signals, or sound, often through an audio effect or effects unit. As audio signals may be electronically represented in either digital or analog format, signal processing may occur in either domain.Analog processors operate directly on the electrical signal, while digital processors operate mathematically on the digital representation of that signal.

Word Processor

A word processor may be viewed as an electronic device or a computer application software that performs word processing: the composition, editing, formatting and sometimes printing of any sort of written material. Word processing can also refer to advanced shorthand techniques, sometimes used in specialized contexts with a specially modified typewriter.

Typical features of a word processor include:

•  font application,
•  spell checking,
•  grammar checking,
•  a built-in thesaurus,
•  automatic text correction,
•  Web integration and HTML exporting.

The word processor emerged as a stand-alone office machine in the 1970s and 1980s, combining the keyboard text-entry and printing functions of an electric typewriter with a dedicated computer processor for the editing of text.

 Although features and designs varied among manufacturers and models, and new features were added as technology advanced, word processors typically featured a monochrome display and the ability to save documents on memory cards or diskettes.

As the more versatile combination of personal computers and printers became commonplace, and computer software applications for word processing became popular, most business machine companies stopped manufacturing word processor machines.

Data Processing System

Data processing is any process that a computer program does to enter data and summarise, analyses or otherwise convert data into usable information. Because data are most useful when well-presented and actually informative, data-processing systems are often referred to as information systems. Data-processing systems typically manipulate raw data into information. 

Data processing may or may not be distinguished from data conversion, when the process is merely to convert data to another format, and does not involve any data manipulation.

Digital Signal Processor

A digital signal processor (DSP) is a specialized microprocessor with an architecture optimized for the operational needs of digital signal processing.Digital signal processing algorithms typically require a large number of mathematical operations to be performed quickly and repeatedly on a series of data samples. Many DSP applications have constraints onlatency; that is, for the system to work, the DSP operation must be completed within some fixed time, and deferred processing is not viable.Most general-purpose microprocessors and operating systems can execute DSP algorithms successfully, but are not suitable for use in portable devices such as mobile phones because of power supply and space constraints. A specialized digital signal processor, will tend to provide a lower-cost solution, with better performance, lower latency, and no requirements for specialized cooling or large batteries.