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The TEXAS INSTRUMENTS LPC SPEECH CHIPS are a series of speech synthesizer digital signal processor integrated circuits created by Texas Instruments beginning in 1978. They continued to be developed and marketed for many years, though the speech department moved around several times within TI until finally dissolving in late 2001. The rights to the speech-specific subset of the MSP line, the last remaining line of TI speech products as of 2001, were sold to Sensory, Inc. in October 2001.

CONTENTS

* 1 Theory * 2 History * 3 TI LPC Speech chip family * 4 References

THEORY

Speech data is stored through pitch-excited linear predictive coding (PE-LPC), where words are created by a lattice filter , selectably fed by either an excitation ROM (containing a glottal pulse waveform) or an LFSR (linear feedback shift register ) noise generator. Linear predictive coding achieves a vast reduction in data volume needed to recreate intelligible speech data.

HISTORY

The TMC0280/TMS5100 was the first self-contained LPC speech synthesizer IC ever made. It was designed for Texas Instruments by Larry Brantingham, Paul S. Breedlove, Richard H. Wiggins, and Gene A. Frantz and its silicon was laid out by Larry Brantingham. The chip was designed for the 'Spelling Bee' project at TI , which later became the Speak & Spell . A speech-less 'Spelling B' was released at the same time as the Speak used on all non-super versions of the Speak & Spell except for the 1980 UK version, which used the TMC0280/CD2801 below. Publicly sold as TMS5100. It was also used on the Byron Petite Electronic Talking Typewriter toy. Superseded in 1979 by TMS5100A and TMS5110.

1980

* TMC0280 AKA CD2801: Used in the Speak & Math , Speak designed for use by the TI consumer division for the TI 99/4A speech module; also used on the 4th generation Bally/Midway pinball tables' Squawk and Talk speech board (part number AS-2518-61), on the Environmental cabinet version of the Bally/Midway arcade game Discs of TRON , on (earlier) Apple II
Apple II
Echo 2 cards, and on the Zaccaria arcade games Jack Rabbit and Money Money, and Zaccaria pinball machines Pinball
Pinball
Champ and Soccer Kings. Superseded by TMS5220 in late 1980/1981, and possibly sold as cheap, 'fire-sale' stock in 1982–1983. Uses the 'final' chirp table. * CD2802: A version of the TMS5100/5110 with different LPC and Chirp tables, not the same as either the TMS5100(A) or TMS5110(A). Used on the Touch and Tell only, never sold outside of the company. Uses its own, unique, chirp table. * TMS5110A (after 1985: TSP5110A): Die shrink of TMS5110, pin and function compatible. Used on at least two home computer products. It was used on the arcade game Bagman by Valadon Automation, by Omnicron Electronics on the TCC-14 Talking Clock/Calendar, and on the arcade game A.D. 2083 by Midcoin. Used on the Chrysler Electronic Voice Alert vehicle monitoring system. Uses the 'final' chirp table. * TMS5220 (AKA CD2805E?): Improved version of the TMS5200, pin but not function compatible (has new LPC tables); used on (later) Apple II Echo 2 cards, (rumor) on the very last run of TI 99/4A speech modules, on the BBC Micro
BBC Micro
, in Bally/Midway 's NFL Football arcade game, and in many Atari, Inc. arcade games, including Star Wars
Star Wars
, Firefox , Return of the Jedi , Road Runner , The Empire Strikes Back . Later Atari arcade games used the TMS5220C, see below. The TMS5220 was also used in and Zaccaria pinball machines Farfalla, Devil Riders, Time Machine, Magic Castle, Robot, Clown, Pool Champion, Blackbelt, Mexico '86, Zankor, and Spooky. The TMS5220 was also used on Venture Line's Looping and Sky Bumper, Olympia 's Portraits, and Exidy 's Victory and Victor Banana arcade machines. Superseded by TMS5220C in 1983/1984. Uses the 'final' chirp table. HP 82967A Speech synthesis module, adding 1500-word vocabulary to Series 80 computers.

1983

* TMS5220C (after 1985: TSP5220C): has the two NOP commands the parallel FIFO interface reworked to control speech rate, added external full reset; minor change apparent to the way energy values affect unvoiced frames. Otherwise identical, pin-compatible, and a drop-in replacement to the TMS5220. Used on the Atari
Atari
arcade games Indiana Jones and the Temple of Doom , 720° , Gauntlet , Gauntlet II , A.P.B. , Paperboy , RoadBlasters , Vindicators Part II, and finally Escape from the Planet of the Robot Monsters . Also used on the IBM PS/2
PS/2
Speech Adapter and the Pacific Educational Systems RS-232 Speech adapter. Manufactured into the early 1990s.

1985

* TSP50C50: CMOS, uses LPC-12 instead of LPC-10, uses TMS60C20 256Kb/32KiB serial ROM instead of TMS6100 . Uses 'D6' LPC tables and chirp tables, which were common for the whole TSP50Cxx series. Has built in low-pass analog filter. Manufactured into the early 1990s.

1986

* TSP50C40 (later MSP50C40): TSP50C50 plus a simple 8-bit microcontroller with on-chip mask ROM. Was used in a number of TI's consumer division products. was named CM54129/CM54169 for the speak -webkit-column-width: 30em; column-width: 30em; list-style-type: decimal;">

* ^ A B C D ftp://ftp.whtech.com/pc%20utilities/qboxpro.zip * ^ "VC&G - VC&G Interview: 30 Years Later, Richard Wiggins Talks Speak & Spell Development". * ^ http://americanhistory.si.edu/archives/speechsynthesis/ss_ti.htm * ^ "DATAMATH". * ^ A B http://nouspikel.group.shef.ac.uk//ti99/speech.htm * ^ "DATAMATH". * ^ "DATAMATH". * ^ "DATAMATH". * ^ "Petite electronic talking typewriter.". * ^ "DATAMATH". * ^ "DATAMATH". * ^ "DATAMATH". * ^ "andys-arcade Online Store for JAMMA video arcade game PCBs obscure ics and arcade parts!". * ^ U.S. Patent 4,403,965 * ^ U.S. Patent 4,631,748 * ^ MAWS - searchable information about resources in MAME .122u8 * ^ "Album Speech". * ^ EE Times. "." June 14, 2001.

Notes

* ftp://ftp.whtech.com/datasheets%20and%20manuals/Datasheets%20-%20TI/TMS5220.PDF - TMS5220 datasheet * Video - Demonstration of TMS5220 via emulation and demo of QBOX Pro software.

* v * t * e

Speech synthesis

FREE SOFTWARE

SPEAKING

* eSpeak /eSpeakNG * Gnopernicus * Gnuspeech * Orca * Festival Speech Synthesis System /Flite * FreeTTS * Automatik Text Reader

SINGING

* eCantorix * Lyricos / Flinger * Sinsy * Cadencii

Proprietary software

SPEAKING

* DECtalk * Software Automatic Mouth * Talk It! * Microsoft Agent * Microsoft Speech API * Microsoft text-to-speech voices * Readspeaker * Voice browser * CoolSpeech * BrowseAloud * IVONA * CereProc * CeVIO Creative Studio * Voiceroid * LaLaVoice

SINGING

* Alter/Ego * Cantor * CeVIO Creative Studio * Chipspeech * Symphonic Choirs * Vocaloid
Vocaloid
* NIAONiao Virtual Singer * Vocalina * Utau * Realivox * PPG Phonem

MACHINE

* Echo 2 * Pattern playback * Phasor * RIAS * Texas Instruments LPC Speech Chips * TuVox

APPLICATIONS

* AOLbyPhone * DialogOS * Dr. Sbaitso * MBROLA * Microsoft Narrator * Microsoft Speech Server * PlainTalk * Voice font

PROTOCOLS

* Speech Synthesis Markup Language * SABLE
SABLE
* VoiceXML

Developers/ Researchers

* Alan W. Black * Catherine Browman * Franklin Seaney Cooper * Gunnar Fant * Haskins Laboratories * Wolfgang von Kempelen * Ignatius Mattingly * Philip Rubin * Yamaha

PROCESS

* Articulatory synthesis * Concatenative synthesis * Currah * Inverse filter * PSOLA * Phase vocoder * Self-voicing

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