Previous: SOM-PAK:
Up: NEURAL NETWORK SIMULATION TOOLS
Next: Valentino
Previous Page: SOM-PAK:
Next Page: Valentino

TDNN

Name

TDNN (Time Delay Neural Network)

Source

i.n.a. (= ``information not available'')

Price

free of charge

Target usage

demonstration example; beginners

Model

Network Architecture

The network has one fixed, predefined topology for the recognition of the ten spoken digits 0-9 from continuous speech; the input layer consists of 16 x 11 units, i. e. the outputs of 15 frequency-domain bandpass-filters and one zero-crossing detector sampled at 10 equally spaced time points and one word endpoint.

Paradigms

Time Delay Neural Network

Limitations

Training takes exactly 64 iterations; training method not described. (see also network description above)

Implementation

Display

monochrome

User Interface

shell

Execution

By logging of commands

Data Format

ASCII files containing the paths and names of speech data files; 10 speech data files containing digitized speech data for an example of the spoken digits.

Evaluation

Scoring programs that calculate recognition accuracy based on an area and on a threshold criterion are enclosed with the package.

Performance

System Requirements

Hardware

PC

Operating System

DOS

Display

monochrome

Language

C, FORTRAN

Installation and Documentation

Installation

By lha in DOS

Sources available

Programs written and poorly commented in FORTRAN and C are included in the package.

Implementation language

C, FORTRAN

Documentation

Only a very short description of the files and programs is available. The simulation programs are broken up into five sub-directories. Front contains the feature extraction program. Prelearn contains the time delaying program. Learn contains the network training program. Recognize contains the testing program. And Useful contains several scoring programs, a segmentation program to isolate single digits from continuous speech based on network recognition, and a program to re-align (rejustify) the endpoints of the training digits.

Support

none

User Groups