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Frequency-Based Coloring of the Waveform Display to Facilitate Audio Editing and Retrieval

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The audio waveform display provides the visual focus in audio-editing systems yet sounds are difficult to see in the display. Using a new technique, the display is colored to represent the frequency content to make sounds more visible. This requires extraction of frequency information from the audio signal and an appropriate mapping of this information to the color space. Ideally, the coloring is independent of recording level, and similar sounds are represented by similar colors. Audio-editing systems are enhanced by the improved user interface. Audio-retrieval systems can present colored waveform displays as visual “thumbnails” in a list of search results.

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AES - Audio Engineering Society