Patent ID: 9626970
Date: 2017-04-18
CPC Classifications: G10L,H04M

Claim:
1. A method of speaker identification for audio content, the audio content being of a format based on multiple channels, the method comprising: extracting, from a first audio clip in the format, a plurality of spatial acoustic features across the multiple channels and location information, the first audio clip including a plurality of frames for each of a plurality of channels, the first audio clip including audio content corresponding to voices from a speaker, the spatial acoustic features including acoustic characteristics of the voices from the speaker; constructing a first model for the speaker based on the spatial acoustic features and the location information, the first model indicating a characteristic of the voices from the speaker; and identifying whether the audio content contains voices from the speaker based on the first model, wherein the spatial acoustic features include an intra-channel shifted delta cepstrum (SDC) feature and an inter-channel SDC feature, and wherein extracting the spatial acoustic features from the first audio clip comprises: for each of the multiple channels, extracting a cepstrum coefficient for each frame of the first audio clip in a frequency domain; determining an intra-channel SDC feature for each of the multiple channels based on difference between the cepstrum coefficients for the channel over a predetermined number of frames; and determining an inter-channel SDC feature for each two of the multiple channels based on difference between the cepstrum coefficients for the two channels.