Lossless compression of binary audio signals

R. V. D. Vleuten, Fons Bruekers
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引用次数: 1

Abstract

A binary data format, known as direct stream digital (DSD), has been proposed for the representation of audio signals. The typical sample rate of these binary audio signals is 64 x 44.1 kHz, so the bit rate equals 64 x 44100 = 2.8 Mbit/s (per audio channel). In order to reduce this rate, without affecting the audio quality in any way, lossless compression of these signals is necessary. Because the well-known general compression methods for binary data are too complex to be practically applied to these signals, we have developed a new lossless compression method that exploits only linear dependencies in the signal, which allows a real-time hardware implementation, even for contexts (memory) of 100 bits, or more. The encoder and decoder block diagrams for our method are shown.
无损压缩二进制音频信号
一种被称为直接流数字(DSD)的二进制数据格式已经被提出用于音频信号的表示。这些二进制音频信号的典型采样率是64 x 44.1 kHz,因此比特率等于64 x 44100 = 2.8 Mbit/s(每个音频通道)。为了在不影响音频质量的情况下降低这个速率,对这些信号进行无损压缩是必要的。由于众所周知的二进制数据的通用压缩方法过于复杂,无法实际应用于这些信号,因此我们开发了一种新的无损压缩方法,该方法仅利用信号中的线性依赖关系,从而允许实时硬件实现,即使对于100位或更多的上下文(内存)也是如此。给出了我们方法的编码器和解码器框图。
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