Method and apparatus for tracking pitch in audio analysis
AssigneeMicrosoft Corporation
InventorsEric I-Chao Chang, Jian-Lai Zhou
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Abstract
A computationally efficient and robust pitch detection and tracking system and related methods are presented. According to certain exemplary implementations a method is presented comprising identifying an initial set of pitch period candidates using a first estimation algorithm, filtering the initial set of candidates and passing the filtered candidates through a second, more accurate pitch estimation algorithm to generate a final set of pitch period candidates from which the most likely pitch value is selected.
Claims27
A method comprising:
- identifying an initial set of pitch value candidates within each frame of a plurality of frames of received audio content utilizing a first pitch estimation algorithm;
- and
- reducing the initial set of pitch value candidates to a select set of pitch value candidates based, at least in part, on pitch value re-scoring utilizing a second pitch estimation algorithm, wherein the select set of pitch values are selected in substantially real-time.
The computer readable media having computer instructions for performing acts comprising:
- identifying an initial set of pitch value candidates within each frame of a plurality of frames of received audio content utilizing a first pitch estimation algorithm;
- and
- reducing the initial set of pitch value candidates to a select set of pitch value candidates based, at least in part, on pitch value re-scoring utilizing a second pitch estimation algorithm, wherein the select set of pitch values are selected in substantially real-time.
An apparatus comprising logic configured to receive audio content, identify an initial set of pitch value candidates within each frame of a plurality of frames of the received audio content utilizing a first pitch estimation algorithm, and reduce the initial set of pitch value candidates to a select set of pitch value candidates based, at least in part, on pitch value re-scoring utilizing a second pitch estimation algorithm, wherein the select set of pitch values are selected in substantially real-time.
Dependencies are inferred from the claim text.