“data compression”的概念、定义、翻译、参考文献-科学参考

data compression

Computer

1. Another name for data compaction, although, strictly, data compaction is lossless while data compression need not be (see def. 2).
2. Removal from a file or data stream of information that may be redundant either in the sense of information theory, or in the sense that the retention of precision, definition, or some similar measure of quality is less important than the necessity to abbreviate the data. In the former sense, the abbreviation is lossless, while in the latter sense it is lossy. Compression permits either or both kinds, and so its effects are not always exactly reversible.
Generally, in the context of discrete and continuous systems, the output from continuous systems, if it is to be abbreviated, can often be lossily compressed. This is notably the case with sound, and with halftone and coloured images. See also image compression.

Internet

The process of reducing the size of a collection of data. There are three reasons for carrying out this activity: to save file space, to reduce the time taken for data to travel over a network connection, and to save space when backing up a file. There are a number of data compression algorithms in existence. They are categorized as either lossy compression schemes which results in some loss of the data, or a lossless compression schemes which results in no loss.

Electronics and Electrical Engineering

The process of reducing the amount of data that represents a signal with minimum degradation to the signal when it is reconstructed. This may be of interest in order to reduce transmission bandwidth or storage requirements. One example is speech data compression using linear predictive coding (see linear prediction).

单词	data compression
释义	data compression Computer 1. Another name for data compaction, although, strictly, data compaction is lossless while data compression need not be (see def. 2). 2. Removal from a file or data stream of information that may be redundant either in the sense of information theory, or in the sense that the retention of precision, definition, or some similar measure of quality is less important than the necessity to abbreviate the data. In the former sense, the abbreviation is lossless, while in the latter sense it is lossy. Compression permits either or both kinds, and so its effects are not always exactly reversible. Generally, in the context of discrete and continuous systems, the output from continuous systems, if it is to be abbreviated, can often be lossily compressed. This is notably the case with sound, and with halftone and coloured images. See also image compression. Internet The process of reducing the size of a collection of data. There are three reasons for carrying out this activity: to save file space, to reduce the time taken for data to travel over a network connection, and to save space when backing up a file. There are a number of data compression algorithms in existence. They are categorized as either lossy compression schemes which results in some loss of the data, or a lossless compression schemes which results in no loss. Electronics and Electrical Engineering The process of reducing the amount of data that represents a signal with minimum degradation to the signal when it is reconstructed. This may be of interest in order to reduce transmission bandwidth or storage requirements. One example is speech data compression using linear predictive coding (see linear prediction).
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