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山东大学 软件学院
山东大学 软件学院
山东大学 软件学院
山东大学 软件学院
现状
最简单的——将完整的音频文件进行直接的数字
波形比对
准确率低!!!
改进版——可通过MD5和CRC算法,将数据转
换成紧凑的表示形式
结果对数据过于敏感,
鲁棒性较差!!
Gracenote Mobile
 音频指纹 : 能够代表一段音乐重要特征的
基于内容的紧致数字签名
现状 音频指纹
时域特征
频域
特征
时频特
征
山东大学 软件学院
 前端处理和建模
现状 音频指纹
预处理
分帧和重叠
转换
特征提取
后处理
指纹模型化
输入
• 音频信号
采样
AD处理
单声道转换
预加重
带通滤波 能量
音调
节拍
纠错码、矢量量化、量化直方图
山东大学 软件学院
 前端处理和建模
现状 音频指纹
山东大学 软件学院
音乐集 指纹提取
数据库
元数据
指纹提取 比对
未知音乐 音乐ID,
元数据
音乐集 指纹提取
数据库
元数据
指纹提取 比对
未知音乐 音乐ID,
元数据
现状 音频指纹 处理流程
山东大学 软件学院
 界面简洁明了,方便操作
 数据库中获取了DoubanFM的大量歌曲,提
高了辨析准确性
 利用用户的检索历史分析用户喜好。推荐
歌曲
现状 音频指纹
使用、特
色
山东大学 软件学院
山东大学 软件学院

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