Information processing apparatus, information processing method and program

• US 8,738,674 B2
• Filed: 10/23/2006
• Issued: 05/27/2014
• Est. Priority Date: 10/25/2005
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kobayashi, Yoshiyuki
• Primary Examiner(s): Ngo, Chuong D
• Assistant Examiner(s): SANDIFER, MATTHEW D
• Application Number:
  US11/584,626
• Publication Number:
  US 20070112558A1
• Time in Patent Office: 2,773 Days
• Field of Search: 708200-209, 708/422, 717151-161
• US Class Current: 708/200
• CPC Class Codes: G10H 1/0025 Automatic or semi-automatic music composition, e.g. producing random music, applying rules from music theory or modifying a musical piece automatically producing a series of tones G10H1/26
• CPC Class Codes: G10H 1/38 Chord
• CPC Class Codes: G10H 2210/081 for automatic key or tonality recognition, e.g. using musical rules or a knowledge base
• CPC Class Codes: G10H 2210/111 Automatic composing, i.e. using predefined musical rules
• CPC Class Codes: G10H 2210/151 using templates, i.e. incomplete musical sections, as a basis for composing
• CPC Class Codes: G10H 2210/555 Tonality processing, involving the key in which a musical piece or melody is played tonality analysis, detection or identification G10H2210/081
• CPC Class Codes: G10H 2210/576 Chord progression
• CPC Class Codes: G10H 2250/011 Genetic algorithms, i.e. using computational steps analogous to biological selection, recombination and mutation on an initial population of, e.g. sounds, pieces, melodies or loops to compose or otherwise generate, e.g. evolutionary music or sound synthesis
• CPC Class Codes: G10H 2250/031 Spectrum envelope processing

Abstract

An information processing apparatus to create an arithmetic expression by combining one or more operators includes a detection unit to detect a permutation of plural operators existing in common to the plural created arithmetic expressions, and a registration unit to register the detected permutation of the operators as a new operator.

Claims

1. An information processing apparatus, comprising:

a memory device storing program code; and

a processor executing the program code to perform;

extracting a common operator permutation existing in a plurality of arithmetic expressions, the common operator permutation comprising a plurality of operators;

registering the extracted common operator permutation as a new operator after the extraction;

creating a first new expression using the new operator;

calculating a contribution ratio of the new operator to the first new expression;

comparing the contribution ratio with a pre-determined value;

re-using the new operator for a second new expression if the contribution ratio is higher than or equal to the pre-determined value; and

modifying the new operator if the contribution ratio is lower than the pre-determined value.

2. The information processing apparatus according to claim 1, wherein the common operator permutation comprises at least one of a processing symmetry axis or a parameter.

3. The information processing apparatus according to claim 1, wherein the processor further executing the program code to perform:

creating a plurality of operator permutations, each of the created operator permutations including a specified number of operators, and

identifying one of the created permutations, which has a high appearance frequency in the plurality of the arithmetic expressions, as the common operator permutation.

4. The information processing apparatus according to claim 1, wherein the processor further executing the program code to perform creating a new arithmetic expression by combining one or more operators including the new operator.

5. The information processing apparatus according to claim 1, wherein the contribution ratio is a ratio of the new operator as an arithmetic result of the new expression.

6. An information processing method of an information processing apparatus comprising a processor and a memory device, the method comprising the steps of:

extracting, by the processor, a common operator permutation existing in a plurality of arithmetic expressions, the common operator permutation comprising a plurality of operators;

registering, by the processor, in the memory device the extracted common operator permutation as a new operator after the extraction;

creating, by the processor, a first new arithmetic expression including the new operator;

calculating, by the processor, a contribution ratio of the new operator to the first new expression;

comparing, by the processor, the contribution ratio with a pre-determined value;

re-using the new operator for a second new expression if the contribution ratio is higher than or equal to the pre-determined value; and

modifying the new operator if the contribution ratio is lower than the pre-determined value.

7. The method according to claim 6, further comprising:

creating, by the processor, a plurality of operator permutations, each of the created operator permutations including a specified number of operators, and

identifying, by the processor, one of the created permutations, which has a high appearance frequency in the plurality of the arithmetic expressions, as the common operator permutation.

8. The method according to claim 6, further comprising:

creating, by the processor, a new arithmetic expression by combining one or more operators including the new operator.

9. A non-transitory computer-readable storage medium tangibly storing a program to create a new arithmetic expression including one or more operators, the program causing a computer to execute a process comprising the steps of:

extracting, by the computer, a common operator permutation existing in a plurality of arithmetic expressions, the common operator permutation comprising a plurality of operators;

registering, by the computer, the extracted common operator permutation as a new operator after the extraction;

creating, by the computer, a first new arithmetic expression including the new operator;

calculating, by the computer, a contribution ratio of the new operator to the first new expression;

comparing, by the computer, the contribution ratio with a pre-determined value; and

re-using the new operator for a second new expression if the contribution ratio is higher than or equal to the pre-determined value; and

modifying the new operator if the contribution ratio is lower than the pre-determined value.