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

• US 20090217806A1
• Filed: 05/01/2009
• Published: 09/03/2009
• 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: Shishido, Ichiro, Makino, Masaaki
• Granted Patent: US 7,745,718 B2
• Time in Patent Office: Days
• US Class Current: 84/616
• 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

1-17. -17. (canceled)

18. A music-piece classifying apparatus comprising:

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

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

third 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; and

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

19. A music-piece classifying apparatus as recited in claim 18, wherein the third means comprises:

means for deriving genres of the music pieces from the bibliographic information segments about the music pieces;

means for deciding whether or not each of the music pieces is music in content according to the derived genre thereof; and

means for selecting only the bibliographic-information impression words as final impression words for the music pieces decided to be not music in content.

20. A music-piece classifying apparatus as recited in claim 18, wherein the third means comprises:

means for deriving genres of the music pieces from the bibliographic information segments about the music pieces;

means for deciding whether or not each of the music pieces is music in content according to the derived genre thereof;

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 decided to be music in content;

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; and

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.

21. A music-piece classifying apparatus as recited in claim 18, wherein the third means comprises:

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; and

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.

22. A music-piece classifying apparatus as recited in claim 18, wherein the third means comprises:

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 ranking the bibliographic-information impression words and the feature-quantity impression words according to the derived confidences and the derived probabilities; and

means for, from the bibliographic-information impression words and the feature-quantity impression words, a prescribed number of ones higher in rank as final impression words.

23. A music-piece classifying apparatus as recited in claim 18, wherein the third means comprises:

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; and

means for 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.

24. A music-piece classifying method comprising the steps of:

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

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

selecting ones from the bibliographic-information impression words and the feature-quantity impression words as final impression words assigned to the respective music pieces; and

classifying the music pieces according to the final impression words.

25. A computer readable medium including a computer program for music-piece classification, the computer program comprising the steps of:

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

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

selecting ones from the bibliographic-information impression words and the feature-quantity impression words as final impression words assigned to the respective music pieces; and

classifying the music pieces according to the final impression words.