VRC100-2A

The VRC100-2A has the following features including Highly accurate real-time operation 98-99%+* and up to 200-word vocabulary;Trainable for any vocabulary in any language;Usable with direct microphone, wireless communication, or telephone;Selectable decision threshold for rejection of unwanted inputs;Input/output port configuration for easy product integration;17 user commands for maximum flexibility.

The VRC100-2A training algorithm automatically rejects utterances during training that do not sufficiently agree with the same utterance from previous training samples of the word. This prevents significant alteration of a vocabulary reference pattern caused by spurious noise (bumping the microphone, door closure, coughing, speaking inconsistencies, or simply failing to utter the prompted vocabulary item. In such an event, it may be necessary to repeat an utterance before being prompted to the next sequential utterance. User prompting is accomplished via the host processor and display. Verification is provided during training by the VRC100-2A.This EPROM firmware accommodates 17 user commands for user flexibility.There are two training commands. The normal training command is issued when all or part of the specified vocabulary is cleared and then trained a selectable number of samples. The training update command is used when the stored reference patterns of the specified vocabulary are to be augmented by additional training.Voice Recognition Chip Set VRC100-2A, figure 1, consists of two chips used as building blocks for speech recognition systems and capable of recognizing as many as 100 words or short phrases. This capability may be expanded to 200 words by use of additional RAM. The VRC100-2A permits a flexible system design to meet user requirements. The two integrated circuits are designated ASA-16 and 100-2A. Figure 1 shows a simplified block diagram using the VRC100-2A.

The reset command is used to initialize the recognizer and the associated RAM. Reset causes the word boundary and adaptive gain parameters to return to default value. The VRC100-2A chip set also allows rejection control of invalid utterances via the set reject and read reject threshold commands. Two commands allow reading or writing of word boundary and background noise parameters. Another command allows the object code to be downloaded and executed.