公开(公告)号：WO2013079524A3

公开(公告)日：2013-07-25

申请号：PCT/EP2012073825

申请日：2012-11-28

Applicant: DOLBY INT AB

Inventor： BISWAS ARIJIT ,  FINK MARCO ,  SCHUG MICHAEL

IPC: G10L25/48 ,  G06F17/30 ,  G10L19/022 ,  G10L19/16

CPC classification number: G10L19/02 ,  G10H1/0008 ,  G10H1/383 ,  G10H2210/066 ,  G10H2250/225 ,  G10L19/022 ,  G10L19/038 ,  G10L21/0388 ,  G10L25/54

Abstract: The present document relates to methods and systems for music information retrieval (MIR). In particular, the present document relates to methods and systems for extracting a chroma vector from an audio signal. A method (900) for determining a chroma vector (100) for a block of samples of an audio signal (301) is described. The method (900) comprises receiving (901) a corresponding block of frequency coefficients derived from the block of samples of the audio signal (301) from a core encoder (412) of a spectral band replication based audio encoder (410) adapted to generate an encoded bitstream (305) of the audio signal (301) from the block of frequency coefficients; and determining (904) the chroma vector (100) for the block of samples of the audio signal (301) based on the received block of frequency coefficients.

Abstract translation: 本文件涉及用于音乐信息检索（MIR）的方法和系统。 特别地，本文件涉及从音频信号中提取色度矢量的方法和系统。 描述了一种用于确定音频信号（301）的采样块的色度矢量（100）的方法（900）。 所述方法（900）包括从适于生成的基于频谱带复制的音频编码器（410）的核心编码器（412）接收（901）从所述音频信号（301）的采样块导出的对应的频率系数块 根据频率系数块的音频信号（301）的编码比特流（305）; 以及基于所接收的频率系数块来确定用于所述音频信号（301）的采样块的色度矢量（904）（904）。