Speech recognition system utilizing IC cards for storing unique voice patterns

• US 4,961,229 A
• Filed: 07/21/1989
• Issued: 10/02/1990
• Est. Priority Date: 09/24/1985
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Takahashi, Tsutomu
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): Hoff, Marc S.
• Application Number:
  US07/383,255
• Time in Patent Office: 438 Days
• Field of Search: 381/42, 364/513.5, 235/382, 235/382.5
• US Class Current: 704/246
• CPC Class Codes: G06Q 20/341 Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
• CPC Class Codes: G06Q 20/40145 Biometric identity checks
• CPC Class Codes: G07C 9/257 electronically G07C9/26 takes precedence
• CPC Class Codes: G07F 7/1008 Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
• CPC Class Codes: G10L 17/00 Speaker identification or verification techniques

Abstract

A speech recognition system for identifying a person by his voice includes an IC card, an IC card reader, a microphone, an A/D converter, an analyzer, and a collating circuit. The IC card is carried by a person whose voice pattern is stored therein. The IC card reader reads out the voice pattern from the IC card. The microphone, the A/D converter, and the analyzer cooperate to extract an actual voice pattern of the person carrying the IC card. The collating circuit collates the voice pattern read out from the IC card with the actual voice pattern from the analyzer.

Claims

1. A speech recognition system for identifying a person by his voice, comprising:

an IC card carried by a person, for storing only his voice pattern;

means for reading out said voice pattern from said IC card;

means for extracting an actual voice pattern of said person carrying said IC card; and

means for collating said voice pattern read out from said IC card with said actual voice pattern from said voice pattern extracting means;

wherein said actual voice pattern extracting means comprises a microphone, an A/D converter for converting a voice signal input at said microphone into a digital signal, and an analyzing means for analyzing an output signal from said A/D converter and detecting a voice pattern identification parameter;

said speech recognition system further comprising;

writing means for writing in said IC card an analysis result of said analyzing means which represents a result of the voice signal input at said microphone from said analyzing means, said writing replacing an old voice pattern stored in said IC card with a new voice pattern.

2. A speech recognition system for identifying persons by their respective voices, comprising:

an IC card associated with each of the persons for storing only their respective voice patterns;

an IC card reader for reading a voice pattern from said IC card inserted in said speech recognition system;

means for extracting an actual voice pattern of one of the persons associated with said inserted IC card;

an analyzer for analyzing an output signal from said IC card reader and detecting a voice pattern identification parameter, and for analyzing the extracted actual voice pattern and detecting an actual voice pattern identification parameter;

means for comparing the voice pattern read out from said IC card with the actual voice pattern from said means for extracting in order to determine whether the voice pattern and the actual pattern correspond to each other; and

a writing unit for writing into said IC card an analysis result of said analyzer which represents a determination that a similarity between the voice pattern identification parameter and the actual voice pattern identification parameter falls outside a predetermined range, said writing replacing an old voice pattern stored in said IC card with a new voice pattern.