The purpose of digital signal processing is to measure or filter real-world continuous analog signals. Therefore, it is necessary to convert the signal from the analog domain to the digital domain before performing digital signal processing, which is usually implemented by an analog to digital converter. The output of digital signal processing is often also transformed into the analog domain, which is achieved by a digital-to-analog converter.
Digital signal processing algorithms require the use of computers or specialized processing devices such as digital signal processors (DSPs) and application specific integrated circuits (ASICs). Digital signal processing technology and equipment have the advantages of flexibility, accuracy, strong anti-interference, small size, low cost, and high speed. These are unmatched by analog signal processing technology and equipment.
The implementation methods of DSP generally have the following types:
Implemented in software on a general purpose computer
Add a dedicated acceleration processor to the general purpose computer system
Realized with a general-purpose microcontroller
Implemented with a universal programmable DSP
Implemented with a dedicated DSP chip
Among the above several methods, the disadvantage of the first method is that the speed is slow, and generally can be used for the simulation of the DSP algorithm; the second and fifth methods are highly specific, and the application is greatly limited, and the second method is also It is not convenient for the independent operation of the system; the third method is only suitable for implementing a simple DSP algorithm; only the fourth method makes the application of digital signal processing open a new situation.
Simple implementation of DSP audio processing
Most of the processing of audio in traditional audio equipment uses analog devices, which are bulky, have low precision, are susceptible to environmental influences, and are susceptible to aging and are affected. The use of a digital audio processor greatly reduces the size of the device, improves the accuracy, and the digital device is less affected by the environment, does not affect performance due to aging, and has high flexibility, good reliability, and is easy to develop and upgrade. The essence of digital audio signal processing is to use digital filtering instead of analog filtering to digitally transform the collected audio signal.
The emergence of Digital Signal Processor (DSP) has brought digital signal processing technology to the forefront and has been rapidly developed. In terms of audio quality, digital audio is converted to analog/digital-to-analog, and the closer to analog audio quality, the better. However, digital technology has great advantages in audio editing, synthesis, effect processing, storage, transmission and networking, and in terms of price.
The audio technology in the digital age is not a discarding variable, but an organic combination of the two, learning from each other's strengths, using digital technology to pursue the analog sound quality, and using digital means to make up for the weakness of traditional audio equipment. Audio systems are not limited to the previous analog category, but are moving toward digital.
In modern society, the demand for data communication is diversifying and personalizing. Wireless data communication, as a powerful means of providing data exchange to the public quickly, accurately, safely, flexibly and efficiently, is increasingly demanding in the market. It is in this case that 3G and 4G communication will be continuously introduced, but whether it is 3G or 4G, future communication will be inseparable from DSP technology. DSP is a powerful special microprocessor, the main application. In terms of high-speed mathematical operations and real-time processing of data, voice, and video signals, it can be said that DSP will play a pivotal role in the future communication field.
In the digital conference system, DSP floating-point processing technology can be used to make the sound quality clearer and more perfect.
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