2D Tactile Signal Coding Using Orthogonal Frequency Compression

Solution Overview

Problem

As the number of tactile presentation elements in two-dimensional tactile presentation devices increases, so does the data amount, leading to increased processing loads and potential transmission delays, which can result in undesirable delays in tactile reproduction.

Innovation Solution

A coding device that orthogonally transforms two-dimensional tactile signals based on a time signal to compress information, removing frequency components difficult for humans to perceive, and a decoding device that decodes this compressed data to efficiently concentrate energy on the low-frequency side of the spectrum, allowing for effective tactile reproduction with reduced data amounts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the number of tactile presentation elements is increased to enable diverse tactile stimuli, then tactile presentation capability is improved, but data amount increases leading to processing load increase and transmission delay

Engineering Contradiction:

Improvetactile presentation capabilityVSAvoidtransmission delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent extracts and removes frequency components from the tactile signal that are difficult for humans to perceive. By applying orthogonal transformation to the two-dimensional tactile signal and eliminating less significant frequency components, the system reduces data amount while preserving the essential tactile information that users can actually sense, thereby decreasing transmission delay without significantly compromising tactile presentation capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the representation parameters of the tactile signal by transforming it from the time domain to the frequency domain through orthogonal transformation. This parameter transformation allows the system to identify and remove redundant frequency components, reducing the data amount and transmission time while maintaining the perceptual quality of tactile stimuli

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the number of tactile presentation elements is increased to enable diverse tactile stimuli, then tactile presentation capability is improved, but processing load increases

Engineering Contradiction:

Improvetactile presentation capabilityVSAvoidprocessing load

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extracts and removes frequency components from the tactile signal that are difficult for humans to perceive. By applying orthogonal transformation to the two-dimensional tactile signal and eliminating less significant frequency components, the system reduces data amount while preserving the essential tactile information that users can actually sense, thereby decreasing transmission delay without significantly compromising tactile presentation capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the representation parameters of the tactile signal by transforming it from the time domain to the frequency domain through orthogonal transformation. This parameter transformation allows the system to identify and remove redundant frequency components, reducing the data amount and transmission time while maintaining the perceptual quality of tactile stimuli

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach reduces data amounts while ensuring tactile reproducibility, improving the efficiency of tactile reproduction systems by concentrating energy on perceivable frequency components and removing less significant ones, thus minimizing the risk of unnatural sensations.

Implementation Method 1

a coding unit that performs coding of compressing information amount by orthogonally transforming a two-dimensional tactile signal based on a time signal

Methodology Applied

Scientific EffectOrthogonal transformation:

Implementation Method 2

a decoding unit that decodes coded data obtained by performing coding of compressing information amount by orthogonally transforming a two-dimensional tactile signal based on a time signal

Methodology Applied

Scientific EffectEnergy concentration on low-frequency components:

Data Source

PatentUS11967976B2Coding device, coding method, decoding device, decoding method, and program

Publication Date: 2024.04.23 SONY GROUP CORP

AI summary

To reduce data amount while ensuring tactile reproducibility of a two-dimensional tactile signal, and improve the efficiency of a system related to tactile reproduction.Coding is performed to compress information amount by orthogonally transforming a two-dimensional tactile signal based on a time signal. By orthogonally transforming a two-dimensional tactile signal based on a time signal, it is possible to compress information amount by removing frequency components that are difficult for humans to perceive, as in the case of an image signal, for example. Accordingly, it is possible to reduce data amount while ensuring tactile reproducibility of a two-dimensional tactile signal, and improve the efficiency of a system related to tactile reproduction.