“digital signal processing”的概念、定义、翻译、参考文献-科学参考

digital signal processing

Computer

The branch of signal processing that uses digital systems to operate on signals. The advantages of digital over analogue signal processing are that memory is more easily employed (so that time may be re-run in different speeds and directions) and that a wider range of arithmetic operations and algorithmic complexity is possible; the main advantage, however, is that the possible precision is arbitrarily high. Where filtering of continuous signals is implemented digitally, the accuracy of the filter bandwidth, cut-off frequencies, and skirt slopes is not dependent on the value of passive components, which may change with time and temperature. A further advantage is that the function implemented may be altered by programming the digital function, allowing the implementation of variable bandwidth filters and the like. The main disadvantage is that in some instances digital techniques are slower than analogue techniques. Many specialized digital devices have been developed that retain the advantages but nevertheless operate at high speed, at the cost of flexibility.

Electronics and Electrical Engineering

The use of a microprocessor specifically designed to process data of the form usually required in signal processing applications. The DSP processor, or DSP chip, was developed to meet the operational requirements for processing large amounts of data at the speeds required for speech, audio, telecommunication, and video processing systems. These chips are characterized by short word length, fast CPUs, and on-chip ADCs and DACs, a Harvard architecture, on-chip ROM and RAM for storing filter coefficients and data, extensive pipelining, dedicated hardware multipliers, but limited program memory. Second-generation DSP architectures have removed on-chip data acquisition equipment, increased program memory space, and accelerated arithmetic operations.

单词	digital signal processing
释义	digital signal processing Computer The branch of signal processing that uses digital systems to operate on signals. The advantages of digital over analogue signal processing are that memory is more easily employed (so that time may be re-run in different speeds and directions) and that a wider range of arithmetic operations and algorithmic complexity is possible; the main advantage, however, is that the possible precision is arbitrarily high. Where filtering of continuous signals is implemented digitally, the accuracy of the filter bandwidth, cut-off frequencies, and skirt slopes is not dependent on the value of passive components, which may change with time and temperature. A further advantage is that the function implemented may be altered by programming the digital function, allowing the implementation of variable bandwidth filters and the like. The main disadvantage is that in some instances digital techniques are slower than analogue techniques. Many specialized digital devices have been developed that retain the advantages but nevertheless operate at high speed, at the cost of flexibility. Electronics and Electrical Engineering The use of a microprocessor specifically designed to process data of the form usually required in signal processing applications. The DSP processor, or DSP chip, was developed to meet the operational requirements for processing large amounts of data at the speeds required for speech, audio, telecommunication, and video processing systems. These chips are characterized by short word length, fast CPUs, and on-chip ADCs and DACs, a Harvard architecture, on-chip ROM and RAM for storing filter coefficients and data, extensive pipelining, dedicated hardware multipliers, but limited program memory. Second-generation DSP architectures have removed on-chip data acquisition equipment, increased program memory space, and accelerated arithmetic operations.
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