Pattern matching apparatus

Details Pattern matching apparatus Pattern matching apparatus

1987-07-28

1988-05-03

Shaw, Gareth D.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

G10L 500

Patent

active

047425474

ABSTRACT:
A pattern matching apparatus wherein an input pattern is compared against a reference pattern by a distance or similarity measure (d.sub.ij) between data at respective time points (i, j) of the two patterns. An integration variable (g.sub.ij) of the distance measure is developed along a time path between the time axes of the two patterns to provide a measure of pattern matching. According to the invention, the path may deviate from 45.degree., i.e. the input pattern becomes locally time-compressed or time-expanded, only toward the time axis of the longer pattern. Therefore, local time compression or expansion is allowed only if the total input pattern length requires time compression or expansion, respectively, to match the total length of the reference pattern.

REFERENCES:
patent: 4467437 (1984-08-01), Tsuruta et al.
D. P. Algorithm Optimization for Spoken Word Recognition Sakoe et al., IEEE ASSP, Feb. 1978 pp. 43-49.
Digital Processing of Speech Signals, Rabiner et al. Prentice-Hall Inc., 1978 pp. 476-477.

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