关键词: 语谱图, 伪彩色, 灰度, 映射变换

Abstract: Concerning that the human eye to color resolution is much higher than grayscale difference, this paper proposed a new method to show the spectrogram by C# procedure, which focused on the mapping transformation function and built up the relationship between spectral magnitude and color, to make pseudo-color display come true, and also used it for speech spectrogram display and audio signal processing interface design. Meanwhile in order to achieve better analysis and learning effects, the authors added audio play function so as to watch the spectrogram while listening to the corresponding audio. This method, with simple programming, flexible interface design and less demand on the equipment, can be realized on ordinary PC.

Key words: speech spectrogram, pseudo-color, gray-scale, mapping transformation