Music-piece classifying apparatus and method, and related computer program

• US 7,745,718 B2
• Filed: 05/01/2009
• Issued: 06/29/2010
• Est. Priority Date: 10/28/2005
• Status: Active Grant

• Current Assignee: JVC Kenwood Corporation
• Original Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Inventors: Makino, Masaaki, Shishido, Ichiro
• Primary Examiner(s): Fletcher; Marlon T
• Application Number:
  US12/453,214
• Publication Number:
  US 20090217806A1
• Time in Patent Office: 424 Days
• Field of Search: None
• US Class Current: 84/615
• CPC Class Codes: G06F 16/68 Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually
• CPC Class Codes: G06F 16/683 using metadata automatically derived from the content
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/28 by using information signals recorded by the same method as the main recording G11B27/22 takes precedence
• CPC Class Codes: G11B 27/3027 used signal is digitally coded

Abstract

A bibliographic-information impression word is generated from a bibliographic information segment about selected one of music pieces. An acoustic feature quantity of an audio signal representing the selected music piece is calculated. A feature-quantity impression word is generated from the calculated acoustic feature quantity. A degree of conformity between the bibliographic-information impression word and the feature-quantity impression word is determined. Both the bibliographic-information impression word and the feature-quantity impression word are selected as final impression words when the determined conformity degree is greater than a predetermined threshold value. One is selected from the bibliographic-information impression word and the feature-quantity impression word as a final impression word when the determined conformity degree is not greater than the predetermined threshold value. A signal representing the final impression word or words is stored into a storage in relation to the selected music piece.

Claims

1. A music-piece classifying apparatus comprising:

means for generating bibliographic-information impression words on the basis of bibliographic information segments about music pieces;

means for generating feature-quantity impression words on the basis of acoustic feature quantities of audio signals representing the music pieces;

means for determining a degree of conformity between the bibliographic-information impression word and the feature-quantity impression word for each of the music pieces;

means for selecting both the bibliographic-information impression word and the feature-quantity impression word as final impression words when the determined degree is greater than a predetermined threshold value for each of the music pieces;

means for selecting either the bibliographic-information impression word or the feature-quantity impression word as a final impression word when the determined degree is not greater than the predetermined threshold value for each of the music pieces; and

means for classifying the music pieces according to the final impression words.

2. A music-piece classifying apparatus comprising:

means for generating bibliographic-information impression words on the basis of bibliographic information segments about music pieces;

means for generating feature-quantity impression words on the basis of acoustic feature quantities of audio signals representing the music pieces;

means for deriving confidences corresponding to the respective bibliographic-information impression words;

means for deriving probabilities corresponding to the respective feature-quantity impression words;

means for adding the derived confidences and the derived probabilities to get addition-result values for respective combinations of the bibliographic-information impression words and the feature-quantity impression words or ranking the bibliographic-information impression words and the feature-quantity impression words according to the derived confidences and the derived probabilities;

means for selecting the bibliographic-information impression word and the feature-quantity impression word in a combination greatest in addition-result value as final impression words, or selecting, from the bibliographic-information impression words and the feature-quantity impression words, a prescribed number of ones higher in rank as final impression words, or selecting the bibliographic-information impression words and the feature-quantity impression words in combinations corresponding to addition-result values greater than a prescribed value as final impression words; and

means for classifying the music pieces according to the final impression words.

3. A music-piece classifying apparatus comprising:

means for generating positively-assigned and negatively-assigned candidate impression words on the basis of bibliographic information segments about music pieces;

means for selecting, from the candidate impression words, ones not canceled by the negatively-assigned candidate impression words as bibliographic-information impression words;

means for generating feature-quantity impression words on the basis of acoustic feature quantities of audio signals representing the music pieces;

means for selecting ones from the bibliographic-information impression words and the feature-quantity impression words as final impression words assigned to the respective music pieces through a prescribed deciding process; and

means for classifying the music pieces according to the final impression words.