Norris J F, Lovely D F
Institute of Biomedical Engineering, University of New Brunswick, Canada.
Med Biol Eng Comput. 1995 Sep;33(5):629-35. doi: 10.1007/BF02510779.
The myoelectric signal, obtained by either surface or needle electrodes, is used in many areas of clinical research and diagnosis. The conventional method of storing such information is in digitised form on a computer. However, the bandwidth of the signal and the required resolution result in large memory requirements. Adaptive differential pulse code modulation is investigated as a method of reducing the memory requirements for myoelectric data storage. In this scheme, a 12-bit sample is reduced to four bits, thus reducing the memory requirements by a factor of three. In reality, this compression ratio is closer to 4:1 owing to the fact that the widths of most memories are organised as multiples of eight bits.
通过表面电极或针电极获取的肌电信号被用于临床研究和诊断的许多领域。存储此类信息的传统方法是将其以数字化形式存储在计算机上。然而，信号的带宽和所需的分辨率导致内存需求很大。研究了自适应差分脉冲编码调制作为一种减少肌电数据存储内存需求的方法。在该方案中，一个12位的样本被缩减为4位，从而将内存需求降低了三分之二。实际上，由于大多数存储器的宽度是以8位的倍数来组织的，所以这种压缩比更接近4:1。
