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.
* 1 Theory * 2 History * 3 TI LPC Speech chip family * 4 References
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.
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 Superseded in 1979 by TMS5100A and TMS5110.
* 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
* 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
* 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.
* 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.
* 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.
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