ST-SIM

ST-SIM quantifies spectral and temporal similarity between vibrotactile signals to provide objective quality measures that correlate with human perceptual ratings for Tactile Internet (TI) and haptic codec evaluation.

Key Features:

• Spectral and Temporal Similarity Measures: Computes perceptual spectral similarity and temporal similarity components to evaluate the fidelity of vibrotactile signals.
• Objective Quality Assessment: Produces objective quality metrics that align with subjective human perceptual experiences for vibrotactile signals.
• Large-Scale Subjective Validation: Validated using two extensive subjective experiments collecting participant ratings to assess correlation with human opinion.
• VTQA Database: Supports the creation of the VibroTactile Quality Assessment (VTQA) database containing subjective ratings and corresponding vibrotactile signals.

Scientific Applications:

• Vibrotactile Compression and Transmission: Provides objective metrics and the VTQA database to develop and evaluate vibrotactile compression and transmission methods.
• Standardization and Codec Development: Supplies quality measures for standardization efforts in Tactile Internet (TI) and for designing and assessing haptic codecs.

Methodology:

Computes perceptual spectral similarity and temporal similarity between reference and test vibrotactile signals (dual spectral–temporal approach) and validates these metrics against subjective ratings from two large-scale experiments contributing to the VTQA database.