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method for datenreduktion in the storage and / or transfer digital audio signals for studio applications
method for datenreduktion in the storage and / or transfer digital audio signals for studio applications
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机译：存储和/或传输数字音频信号以用于录音棚应用中的日期还原方法
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摘要
A data compression process is disclosed for the storage and/or transmission of digital audio signals. Known processes, such as ASPEC, allow high quality music to be transmitted in a data stream that contains less than 10 % of the information contained in the data stream used in a CD. Known compression processes do not measure up, however, to the requirements of the professional studio technology, as the subsequent processing of the audio signals that takes place in the studio leads to audible disturbances. The disclosed process is insensitive to subsequent processing, such as tandem coding, mixing or fading. To achieve this insensitivity, the transposition of the audio signal from the time domain to the frequency domain is carried out with perfect reconstruction by means of a filter bank, the psychoacoustic masking effect is utilised to an essentially less extent, and a cascade multidimensional Huffman code is used for coding variable word lengths. This process allows audio signals destined to be used in studio technology to be transmitted at a data rate of 192 kbit/sec per channel.
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