Speech Recognition

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  • Topic: Speech recognition, Speech processing, Facial recognition system
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  • Published : May 23, 2013
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Document: Datasheet

Date: 6-Aug-12

Model #: 1180

Product’s Page: www.sunrom.com/p-762.html

Speech Recognition System based on HM2007
The speech recognition system is a completely assembled and easy to use programmable speech recognition circuit. Programmable, in the sense that you train the words (or vocal utterances) you want the circuit to recognize. This board allows you to experiment with many facets of speech recognition technology. It has 8 bit data out which can be interfaced with any microcontroller for further development. Some of interfacing applications which can be made are controlling home appliances, robotics movements, Speech Assisted technologies, Speech to text translation, and many more.

Features
• • • • • • Self-contained stand alone speech recognition circuit User programmable Up to 20 word vocabulary of duration two second each Multi-lingual Non-volatile memory back up with 3V battery onboard. Will keep the speech recognition data in memory even after power off. Easily interfaced to control external circuits & appliances

Specification
Parameter Input Voltage Output Data Value 9 to 15 V DC 8 bits at 5V Logic Level Note Use a commonly available 12V 500ma DC Adapter Any microcontroller like 8051, PIC or AVR can be interfaced to data port to interpret and implement specialized applications

Applications
There are several areas for application of voice recognition technology.

• • • •

Speech controlled appliances and toys Speech assisted computer games Speech assisted virtual reality Telephone assistance systems

• •

Voice recognition security Speech to speech translation

Introduction
Speech recognition will become the method of choice for controlling appliances, toys, tools and computers. At its most basic level, speech controlled appliances and tools allow the user to perform parallel tasks (i.e. hands and eyes are busy elsewhere) while working with the tool or appliance. The heart of the circuit is the HM2007 speech recognition IC. The IC can recognize 20 words, each word a length of 1.92 seconds.

Complete Schematic of System
VCC VCC CN1 SIP10 R1 6.8K C3 100nF M1 MIC C1 100nF VCC DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 1 2 3 4 5 6 7 8 9 10

DATA OUT
R2 220R R3 220R VCC R6 220R R7 220R R8 220R R9 220R R10 220R R11 220R R12 220R VCC R13 220R R14 220R R15 220R R16 220R R17 220R S2 LT543 b 1 S1 LT543 b 1

READY
D1 LED C2 100nF

+
R4 470R Y1 3.579 Mhz 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 U1 HM2007 GND X2 X1 S1 S2 S3 RDY K1 K2 K3 K4 TEST WLEN CPUM WAIT DEN SA0 SA1 SA2 SA3 SA4 SA5 SA6 SA7 D2 VCC 28 3V BT1 3V BATT BAT85 SA0 SA1 SA2 SA3 SA4 SA5 SA6 SA7 SA8 SA9 SA10 SA11 SA12 ME MR U4 HY6264 10 9 A0 8 A1 7 A2 6 A3 5 A4 4 A5 3 A6 25 A7 24 A8 21 A9 23 A10 2 A11 A12 OE WE CS1 CS2

VCC C4 100nF R5 22K U2 74HC573 9 8 D7 7 D6 6 D5 5 D4 4 D3 3 D2 2 D1 D0 11 1 LE OE 20

S1 S2 S3 K1 K2 K3 K4 VCC DEN SA0 SA1 SA2 SA3 SA4 SA5 SA6 SA7

AGND VDD MICIN LINE VREF D7 D6 D5 D4 D3 D2 D1 D0 MR/MW ME NC NC SA12 SA11 SA10 SA9 SA8 GND VDD D3 BAT85 D0 D1 D2 D3 D4 D5 D6 D7

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 VCC 3V

VCC

D7 D6 D5 D4 D3 D2 D1 D0 MR ME

D0 D1 D2 D3 D4 D5 D6 D7 DEN

GND

Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0

12 13 14 15 16 17 18 19

DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7

VCC

U3 CD4511B 7 1 A 2 B 6 C D 4 5 3 BI LE LT

16

a b c d e f g

13 12 11 10 9 15 14

VCC

VDD

5 4 3 2 1 a 2 4 f 5 g c 7 9 d 10 9 8 7 6 5 4 3 2 1 a 2 4 f 5 g c 7 9 d 10 9 8 7 6 10 e Sheet 1 Rev of 1 10 e

6

GND

1
SA12 SA11 SA10 SA9 SA8 SW1

2
SW2

10

3
SW3 K4

SW4

4

SW5

5

SW6

6
K3

SW9 11 12 13 15 16 17 18 19 D0 D1 D2 D3 D4 D5 D6 D7

7

SW7

8 0

SW8

9
K2 VCC

VCC

U5 CD4511B 7 1 A 2 B 6 C D 4 5 3 BI LE LT

16

8

CLEAR
SW10

TRAIN
SW12 K1

a b c d e f g

13 12 11 10 9 15 14

VDD

6

S3

S2

S1

GND

22 27 20 26 C7...
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