Signal Processors

Digital signal processors (DSPs) are integrated circuits with architecture that is specially optimised to suit the rapid processing of audio and visual signals. The abbreviation DSP also refers to digital signal processing in general.

DSPs change analogue signals into a digital (binary) feed using an analogue to digital converter. The signal is then typically measured, compressed or mathematically filtered before passing through a digital to analogue converter and then to a loudspeaker feed, for instance. Although this task can be performed by any microprocessor, DSP chips are more power-efficient and have special memory structures for multi-tasking. They contain programmable and data memory, processors and interfaces, with traders at ensuring companies can get the supplies they need.

One of the most basic examples of a signal processor is an MP3 player, which records sound and plays it back. Additional functions include equalisation, adjustable volume and a user interface. Home security and entertainment systems also use DSPs, as well as video compression during conference calls (to minimise bandwidth use) and removal of echo on mobile phone conversations. Other applications include speech recognition, industrial processes, computer graphics and medical hardware engineering.

In music and media, digital signal processors are part of standard equipment set-ups in recording studios, where they are connected with audio and media accessories such as mixers and sound effect devices for recording and playback sessions. DJ equipment uses signal processors with amplifiers, cables and electrical connectors. An AV-technology supplier will be able to advise on technical specifications to meet particular requirements. To locate a signal processor distributor, lists wholesale sellers and DSPs with high-performance specifications, ample cache memory and wide data buses.

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