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Details, datasheet, quote on part number:65-0087
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| Part: | 65-0087 |
| Category: | Communication => Telephony => Speech |
| Description: | Use This Low-cost ic to Build a Complete Speech Recognition Solution With Very Few External Components. |
| Company: | Sensory, Inc. |
| Datasheet: | Download 65-0087 datasheet File size : 532 kB |
| Request For quote: | Find where to buy 65-0087
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Datasheet text preview:
Voice ExtremeTM IC
Speech Recognition Controller
Data sheet
Description
The Voice ExtremeTM IC (VE-IC), from the Interactive SpeechTM family of products, is an 8-bit microcontroller designed specifically for speech applications in consumer electronic products. Combined with a 2MB external flash memory, the VE-IC offers the flexibility of a microcontroller with advanced speech technology, including high-quality speech recognition, speech and music synthesis, speaker verification, and voice record and playback. Products can use one or all of the VE-IC features in a single application. The VE-IC supports Sensory SpeechTM 6, the latest speech recognition technology from Sensory, which includes a number of new techniques that significantly improve recognition performance over previous versions. Using sophisticated neural network technology, on-chip speech recognition algorithms reach an accuracy of greater than 97% for speaker-independent recognition and greater than 99% for speaker-dependent recognition. The VE-IC can be purchased in DIE or TQFP packages, or fully assembled as a part of the VE Module. A low-cost development system, the VE Toolkit, contains all software and hardware to create voice activated products.
Features
Full Range of Sensory SpeechTM 6 Capabilities Speaker-independent speech recognition Speaker-dependent speech recognition High quality speech synthesis and sound effects Speaker verification Three-voice music synthesis Voice record & playback Integrated Single-Chip Solution 4 MIPS 8-bit microcontroller On-chip A/D and D/A converters, pre-amplifier, and AGC 32kHz clock for time keeping (DIE package only) Secondary Timer 2 14 I/O lines RS-232 serial interface (uses three I/O) 16-bit external memory bus 24x24 Multiplier for rapid recognition processing Low Power Requirements 2.85 5.25V operation ~10mA operating current at 3V Power down mode; <5 µA standby current The Voice ExtremeTM System Built-in VE-C Interpreter (a subset of ANSI-C) Built-in Dynamic Memory Handler Built-in Speech Technology Firmware
Voice ExtremeTM IC Block Diagram
I/O RS232 SPEAKER
VE-IC
SPEECH PROCESSING UNIT
CPU
I/O RS232
PWM
DAC
AMPLIFIER
MICROPHONE
M IC PREAMP
ADC
AGC
VE-C INTERPRETER
SPEECH TECHNOLOGY FIRMWARE
DYNAMIC MEMORY HANDLER
Mb 2 FLASH
© 2001 Sensory Inc.
P/N 80-0204-C
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Voice ExtremeTM IC
Data sheet
VE-IC architecture
The VE-IC is a highly integrated device that combines: 8-bit microcontroller On-chip VE-C Interpreter 2 Mb Flash memory manager RAM (2.5 Kbytes) A/D converter and D/A converter Input amplifier and pulse width modulator The VE-IC has an external memory interface, with 16-bit addresses and 8-bit data buses, for accessing external 2 Mb Flash memory. Two bi-directional ports provide 14 generalpurpose I/O pins to communicate with external devices (RS232 uses three I\O). The VE-IC has a high frequency (14.32 MHz) oscillator as well as a low frequency (32,768 Hz) oscillator suitable for timekeeping applications (available in Die version). The processor clock can be selected from either source, with a selectable divider value. The device performs speech recognition when running at 14.32 MHz. There are two programmable 8-bit counters / timers, one derived from each oscillator.
AiFE1 AiFE2 AiNŲ AiN1 AOFE1
A[16:17] A[15:0]
PRE-AMP
AOFE2 AOFE3
2Mb FLASH MEMORY INTERFACE SPEECH PROCESSING UNIT 2K TECHNOLOGY SRAM REGISTER SPACE
(448 bytes)
D[7:0] -RDC -W RC -RDD -W RD
ADC
DACOUT
DAC ANALOG CONTROL PULSE W IDTH MODULATOR OSC1 TIMER1 TIMER2 INTERRUPT LOGIC
BUFOUT/ PW M
STACK SPACE
(8 levels)
XI1, XO1 CPU
XI2, XO2 OSC2 PORT 0
VOICE EXTREME INTERPRETER
(INTERNAL ROM)
P1.0-P1.7
TIMING AND CONTROL BREAK POINT REGISTER
I/O Notes: P0.0 = RS232 data IN (RCV) P0.1 = RS232 data OUT (XMT) P1.7 = Serial port enable P0.5 = A16 (can be shared with Keypad only) P0.6 = A17 (can be shared with Keypad only)
-RESET PDN
P0.0-P0.7
Speech recognition
The VE-IC uses a neural network to perform speaker-independent or speaker-dependent speech recognition and uses the external flash memory to store speech recognition information. The VE-IC has several additional speech recognition features as described below. Continuous Listening Continuous Listening allows the chip to continuously listen for a specific word. With this feature a product can be used in a normal environment and only "activates" when a specific word, preceded by quiet, is spoken. Speech and music synthesis The VE-IC provides high-quality speech synthesis by using a hybrid of a time-domain compression scheme that improves on conventional ADPCM and a customized reuse of sounds. Speech synthesis uses the external flash to store audio sounds for synthesis. The VE-IC provides high-quality, low-cost three-voice music synthesis which allows multiple, simultaneous instruments for harmonizing; it uses a MIDI-like system to generate music. Record and playback The VE-IC can perform audio record and playback at various compression levels depending on the quantity and quality of playback desired. Data rates of under 14,000 bits per second are achievable while maintaining very high quality reproduction. VE-IC also performs silence removal to improve sound quality and reduce memory requirements. Speaker verification The VE-IC can also perform text-dependent speaker verification. After a speaker trains the chip on a specific word, the chip is able to identify whether that word is spoken by the original speaker, thus providing biometric security. Word spot Word Spot provides the ability to recognize trigger words embedded in continuous speech; thus the password sequence "Robert Henson" could be recognized if spoken as "My name is Robert John Henson". WS can only be used with the Speaker Dependent technology; thus it always requires a training phase. 2 P/N 80-0204-C © 2001 Sensory Inc.
PORT 1
Data sheet
Voice ExtremeTM IC
Using the VE-IC
Creating applications using the VE-IC requires the development of electronic circuitry, software code, and speech/music data files. Software code for the VE-IC can be developed using the VE-C Language (a subset of ANSI-C). The Voice ExtremeTM IDE offers a friendly environment for developing Voice ExtremeTM. For more information about the Voice ExtremeTM development tools, please contact Sensory or Visit the web site www.voice-extreme.com. The following sample circuit provides an example of how the VE-IC might be used in a consumer electronic product. Sample Application Circuit (Die)
Microphone Sensitivity RX determine the microphone sensitivity, by default the microphone gain is pre-set to a level suitable for armslength user interfaces with a 2.2K resistor at RX and 4.7nF capacitor at CX. If a different microphone gain is desired, select the values of RX and CX from the table below: R4 1K 1.5K 2.2K 2.7K 3.9K 4.7K C28 10nF 6.8nF 4.7nF 3.3nF 2.7nF 2.2nF Microphone Note Close range or headset Arms length Distance
© 2001 Sensory Inc.
P/N 80-0204-C
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Voice ExtremeTM IC
Data sheet
2Mbit Flash Memory This memory is required on the VE-IC and all VE applications. Because of the powerful dynamic memory handler of VE system software, this Flash is designed to store the application code, speaker independent weight sets, speech templates, record and playback data, program data, and music data. These are the 2Mbit flash supported (for further information please refer to manufacturer documentation): Manufacturer SST WINBOND +5 Vdd 29EE020 29C020 +3 Vdd 29LE020 29LV020 29V020
4X5 Matrix Keypad Support The VE-IC supports a 4x5 keypad that can be controlled using functions built into the VE-C language. When the keypad is scanned, the columns are driven (active low), the rows are sensed (pulled high) and all previous configuration and output values for these pins are saved and restored. The keypad I/O pinouts are as follows: Pin P0.3 P1.3 P0.4 P1.4 P0.5 1 4 7 * P1.5 2 5 8 0 P0.6 3 6 9 # P1.6 A B C D P0.2 E F G H
General Purpose I/O The VE Module has 14 general-purpose I/O pins. Each line can be programmed as an input with a weak pull-up resistor (~150k ohm), input with a strong pull-up resistor (~10k ohm), input without pull-ups, or as an output. Note: If an application is stand-alone (once you download the program via asynchronous serial I/O), the two serial I/O pins, P0.0 and P0.1, and the serial port enable, P1.7, may be used for other purposes. Since I/O pins P0.5 and P0.6 are connected to the address bus of the Flash memory, they can be used only for the matrix keypad; they should not be used under any other circumstances since they are allocated as Flash address lines. Power The typical operating current is 10 mA operating at 14.32 MHz and 3V. Lowering clock frequency reduces power consumption, although speech recognition requires a 14.32 MHz clock. Standby current is <5µA in power down mode. Oscillators Two independent oscillators in the VE-IC provide a high-frequency clock and a 32kHz time-keeping clock. Both oscillators work with an external crystal, a ceramic resonator or LC. The oscillator characteristics are: Pins Frequency Notes Oscillator #1 XI1 and XO1 14.32 MHz Oscillator #2 XI2 and XO2 32768 Hz Available only with DIE package
Clock The VE-IC uses a fully static core the processor can be stopped (by removing the clock source) and restarted without causing a reset or losing contents of internal registers. Static operation is guaranteed from DC to 14.32 MHz. Preamplifier The on-chip preamplifier circuit consists of three stages with a maximum overall gain of about 500. The amplifier includes a Vref input that is used to set the amplifier center voltages and must be driven by a low impedance voltage supplied by an external source. The signal inputs of all stages have an 80 K input impedance to the 4 P/N 80-0204-C © 2001 Sensory Inc.
Data sheet
Voice ExtremeTM IC
Vref pad. In a typical design, AOFE1 would be directly coupled to AIFE2, and AOFE2 would be capacitively coupled to AIN0 through an RC lowpass filter to remove DC offset and digital noise. AOFE3 would be bypassed to Vref with a small (220pF) capacitor for additional noise suppression. Analog output The VE-IC offers two separate options for analog output. The DAC (Digital to Analog Converter) output provides a general-purpose 10-bit analog output that may be used for speech output (with the inclusion of an audio amplifier), or other purposes requiring an analog waveform. For speech applications that require driving a small speaker, the PWM (Pulse-Width Modulator) output can be used instead of the DAC output. The PWM output can directly drive a 32 ohm speaker. Serial (RS-232) Communication Serial communication at the application level in Voice ExtremeTM are always performed at 9600 baud, 8 data bits, no parity, 1 stop bit (the download operation runs at 115Kbaud). If an application is stand-alone (once you download the program via asynchronous serial I/O), the two serial I/O pins, P0.0 and P0.1, and the serial port enable, P1.7, may be used for other purposes.
© 2001 Sensory Inc.
P/N 80-0204-C
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