Voice Input Code Identifier (VICI).

This report describes the development, operation and performance characteristics of an improved Advanced Development Model of a Voice Input Code Identifier (VICI). The VICI is an isolated word recognition system capable of recognizing the English digits and four control words, CANCEL, ERASE, VERIFY and TERMINATE. The improved VICI system is based upon equipment previously developed under Contract F30602-74-C-0171. This original VICI system was intended for use by male talkers only and required wide bandwidth speech data input. The advanced development model is capable of operation with input speech which has been limited to telephone bandwidth. It will accept digits and control words as spoken by either male or female talkers. No training of the system by a speaker is necessary. By the use of an alpha-numeric output display, a speaker using the system can verify that each digit spoken into the system was correctly recognized. Errors can be corrected through the use of the control words. In addition, the system can detect and correct many single digit errors which occur within six digit code groups. This error correction algorithm uses check digits which are included in the code groups to detect errors. The system then corrects the errors when possible or requests a reentry of the data by the talker. A speaker dependent software package also was developed which provides for the recognition of up to 200 words.