Digital Signal Processing
Digital signal processing involves the manipulation and automation of analog signal processing. Digital signals are sent through amplifiers or filters that change the frequency and also the amplitude of the signal. This change results in the alteration of the electrical signal and makes it digital in nature. The Digital Signaler uses an electronic device which converts the analog signal into digital. Digital signal processing can be used with analog as well as digital signals.
Digital signal processing is mostly used in industries where there is a need for a large scale digital manipulation of data. Digital signal processing has found its niche in the electronic appliances that play a key role in telecommunication, entertainment, medical, military, and other areas. Digital signal processing involves the utilization of digital signal processing, like by advanced computers or specialized digital signal processing devices, to do a wide range of signal processing functions. Digital Signal Processing is used for signal enhancement, demodulation, compression, and other lossless audio conversions.
Digital audio compression is an audio conversion process that takes digital voice signals and compresses them into a lower level representation. The result is a voice conversation becomes less difficult to understand. Digital audio compression (DAFC) is used in Wideband Digital Audio Compression (WDA). The Wideband Digital Audio compression algorithm converts voice signals of the high frequencies into low frequency raw analog audio, thereby, reducing distortions at the receiving end.
Digital audio post-processed (DAC) is a digital audio compression method that employs an AC-powered amplifier and compressor to improve the quality of compressed audio files. Unlike conventional compressors, digital compressors eliminate unwanted components from speech signals. They are able to compress audio in real time and achieve superior results when compared to conventional compressors. A good digital audio compressor will be able to adjust its compressor settings to handle any dynamic source.
Digital Signal Processing (DSP) is the process of converting digital information (digital audio) into analog signals which can then be sent to sound card, speakers, or headphones. The digital audio post-processor converts the analog signal into the desired digital signal, compressing and enhancing the signal as needed. DSPs are usually used on digital devices that will send and receive audio over a network such as MP3 players, digital video recorders (DVR), television sets, and telephone lines. Most common use of digital audio post-processing is to convert digital voice messages into telephone speech. There are also some digital audio post-processed devices that are designed for use in voice-over Internet protocol (VoIP) communications where the data that is sent is converted back into an analog signal to make it compatible with regular analog telephone service (ATC).
Digital Signage Processing offers a flexible method of transmitting digital information over long distances at an economical cost. Some digital signal processing tasks include amplitude and phase shifting, spectrum compression, bit reversal, and quantization. Digital Signage Processing is becoming one of the most popular technologies in the audio and video market. This technology is not only used in broadcast communications but also in electronic and hybrid appliances, home appliances, computer applications, and personal audio products and services. The price of digital signal processing equipment depends on the complexity of the job and the specifications needed.