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    • 5. 发明授权
    • Device, method, and medium for generating audio fingerprint and retrieving audio data
    • 用于生成音频指纹和检索音频数据的设备,方法和介质
    • US08380518B2
    • 2013-02-19
    • US11598134
    • 2006-11-13
    • Hyounggook KimYuan Yuan SheKiwan EomXuan ZhuJiyeun Kim
    • Hyounggook KimYuan Yuan SheKiwan EomXuan ZhuJiyeun Kim
    • G10L23/00G10L19/02H03M13/00
    • G06Q30/0276G10L19/0212G10L25/48
    • Provided are device, method, and medium for generating an audio fingerprint and retrieving audio data. The device for generating an audio fingerprint includes: a coefficient extracting section partially decoding audio data in a compression area and extracting MDCT (Modified Discrete Cosine Transform) coefficients; a coefficient selecting section selecting an MDCT coefficient robust to noises from the extracted MDCT coefficients; a modulation spectrum generating section transforming the selected MDCT coefficient by the use of a Fourier transform method and generating a modulation spectrum; and a bit conversion section quantizing the generated modulation spectrum and generating an audio fingerprint. As a result, it is possible to accurately and rapidly retrieve the audio data recorded in a variety of environments. Since elements based on MP3 are used, it is possible to apply to MP3 applications in various manners. In addition, it is possible to apply to classification of audio data such as classification of music moods and classification of music genres and various other fields such as extraction of a specific event from moving images of sports.
    • 提供用于生成音频指纹和检索音频数据的设备,方法和介质。 用于产生音频指纹的装置包括:系数提取部分,对压缩区域中的音频数据进行部分解码并提取MDCT(改进的离散余弦变换)系数; 系数选择部分,从提取的MDCT系数中选择对噪声鲁棒的MDCT系数; 调制频谱生成部,通过使用傅里叶变换方法变换所选择的MDCT系数,生成调制频谱; 以及比特转换部分,对生成的调制频谱进行量化并生成音频指纹。 结果,可以准确且快速地检索记录在各种环境中的音频数据。 由于使用基于MP3的元素,因此可以以各种方式应用于MP3应用。 此外,可以应用于诸如音乐心情的分类和音乐流派的分类等音频数据的分类以及诸如从运动的运动图像中提取特定事件的各种其它领域。