Pedal Data Generation from Key-Only Playing Data

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Solution Overview

Problem

Existing technologies require music piece data that distinctly represents key operations and pedal operations, but in some cases, only data defining sound production periods for keys is available without differentiation between key operations and pedal operations.

Innovation Solution

An information processing method and device that generate pedal data representing the operation period of a pedal extending sound production by key depression, and key depression data representing the key depression period, from playing data representing a playing content.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If music piece data is prepared that exclusively defines sound production period of each key, then the data structure is simple and easy to process, but the distinction between key operation and pedal operation is lost

Engineering Contradiction:

Improveease of data preparationVSAvoidloss of pedal operation information

Core Design Contradiction:

Ease of manufactureVSLoss of information

Solution Approach 1:

The patent segments the sound production period data into two distinct components: key depression data representing when keys are pressed, and pedal data representing when the pedal is operated. This segmentation allows the system to differentiate between key operations and pedal operations while maintaining processing simplicity, resolving the contradiction between ease of data preparation and preservation of operational distinction.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If music piece data distinguishes between key operation and pedal operation, then the playing control precision is improved, but the data complexity increases

Engineering Contradiction:

Improveprecision of playing controlVSAvoidcomplexity of data structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the differentiation of key and pedal operations into a unified data processing framework. By combining both operations into a single playability determination process that evaluates both key depression data and pedal data together, the system achieves precise playing control without proportionally increasing data structure complexity. The operations are processed simultaneously within the same control logic.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If pedal data is generated from playing data without distinct key and pedal operation definitions, then the adaptability to existing data formats is improved, but the accuracy of pedal operation detection may be reduced

Engineering Contradiction:

Improveadaptability to existing data formatsVSAvoidaccuracy of pedal operation detection

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent introduces key depression data as an intermediary element that indirectly indicates pedal operation. Instead of directly detecting pedal operations from audio (which would be imprecise), the system uses key depression patterns as a mediator to infer pedal timing, achieving both adaptability to existing data formats and sufficient accuracy for playing control.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12249305B2Information processing method, information processing device and a non-transitory storage medium

Publication Date: 2025.03.11 YAMAHA CORP

AI summary

An information processing method implemented by a computer, the information processing method including, generating pedal data representing an operation period of a pedal that extends sound production by key depression, from playing data representing a playing content.