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    • 9. 发明授权
    • Complexity scalable perceptual tempo estimation
    • 复杂性可扩展感知速度估计
    • US09466275B2
    • 2016-10-11
    • US13503136
    • 2010-10-26
    • Arijit BiswasDanilo HollosiMichael Schug
    • Arijit BiswasDanilo HollosiMichael Schug
    • G10H7/00G10H1/40
    • G10H1/40G10H2210/076G10H2230/015G10H2240/075
    • The present document relates to methods and systems for estimating the tempo of a media signal, such as audio or combined video/audio signal. In particular, the document relates to the estimation of tempo perceived by human listeners, as well as to methods and systems for tempo estimation at scalable computational complexity. A method and system for extracting tempo information of an audio signal from an encoded bit-stream of the audio signal comprising spectral band replication data is described. The method comprises the steps of determining a payload quantity associated with the amount of spectral band replication data comprised in the encoded bit-stream for a time interval of the audio signal; repeating the determining step for successive time intervals of the encoded bit-stream of the audio signal, thereby determining a sequence of payload quantities; identifying a periodicity in the sequence of payload quantities; and extracting tempo information of the audio signal from the identified periodicity.
    • 本文件涉及用于估计媒体信号(诸如音频或组合视频/音频信号)的速度的方法和系统。 特别地,该文件涉及人类听众感知的节奏的估计,以及用于以可缩放的计算复杂度进行速度估计的方法和系统。 描述用于从包括频谱带复制数据的音频信号的编码比特流中提取音频信号的速度信息的方法和系统。 该方法包括以下步骤:在音频信号的时间间隔中确定与包含在编码比特流中的频谱带复制数据量相关联的有效载荷数量; 重复音频信号的编码比特流的连续时间间隔的确定步骤,从而确定有效载荷量的序列; 识别有效载荷数量序列中的周期; 以及从所识别的周期中提取音频信号的速度信息。