CN2287320Y - Speech output device of computer printer interface - Google Patents

Abstract

The utility model provides a speech output device of microcomputer printer interface, composed of a printer interface cartridge, a speech operation demonstrator chip which is arranged in the cartridge, being produced by TI and being provided with a slice loading microprocessor, a control circuit comprised a transistor amplifying circuit and an active speaker. The speech chip is provided with a CPU, an ROM, an RAM, an input-output circuit, an advanced speech synthesizer circuit, etc. An LPC-12 can synthesize high grade voice in a low data rate by adopting an algorithm of linear predictive coding. The utility model makes the chip connect with the printer interface control line of the microcomputer in order to form an instantaneous speech power whose hardware is the most simplified, and the speech output device of microcomputer printer interface is applicable to speech teaching, words checking, etc.

Description

The instantaneous speech power of microcomputer printer interface

The utility model relates to a kind of voice output expansion interface device of microcomputer, exactly, relate to a kind of printer interface that can directly insert microcomputer, the output control line that utilizes printer interface is controlled this device work and is exported the computing machine auxiliary device of voice, belongs to the Computer Applied Technology field.

In recent years, multimedia technology develops very fast as an emerging technology widening computer application field.It transfers to Computer Processing to information mediums such as literal, data, figure, image and sound as a conglomerate, thereby computing machine has been brought into a sound, literary composition, the integrated new application of figure, and, computing machine, household electrical appliance, communication facilities are formed a whole, by the unified multimedia system of controlling and managing and constituting of computing machine, more will bring great variety and influence again to the human lives.Present multimedia computer all is that sound blaster by wherein is to comprising voice, musical sound is handled in interior various sound signals and is realized input and output, though the price of this sound blaster has been made a price reduction to three, 400 yuan, perhaps also want cheap, but still dislike functional redundancy and fetch long price for " the popular computer " and " computer learning machine " user that only need voice output.

The purpose of this utility model provides a kind of instantaneous speech power that utilizes the microcomputer printer interface, this device output lamprophonia, reliable operation, and circuit structure is extremely simple, so with low cost.

The utility model is achieved in that it is made up of printer interface cartridge and the control circuit in it, active audio amplifier, it is characterized in that: the control circuit in the printer interface cartridge is that the sheet that has by a Texas ,Usa instrument company (TEXAS) carries the transistor amplifier circuit that the speech synthesizer chip of microprocessor is connected with this chip rear end and constituted.

Above-mentioned Texas ,Usa instrument company (TEXAS) to have the model that sheet carries the speech synthesizer chip of microprocessor be TSP50C1X series.

It is above-mentioned that to have the model that sheet carries the speech synthesizer chip of microprocessor can be TSP50C1X series; The 2nd pin～four data output ends of the 5th pin in the printer interface should be connected with the 1st leg～the 4th leg PA3～PA1 of this chip at this moment, the 6th pin (reset terminal) of printer interface, the 7th pin (power end), the 8th pin (sheet choosing end) then should be connected with the 9th leg PB1 with the 6th leg INT, the 10th leg VDD, the 8th leg PB  of this chip respectively with the 9th pin (read/write control end), and the 10th pin in the printer interface (state-detection end) then is connected with the 13rd leg PA7 of this chip; The 11st leg DA2, the 12nd leg DA1 of this chip are speech output end, and its rear end is connected to a transistor amplifier circuit, and links to each other with active audio amplifier by plug; The then whole ground connection of the 5th leg VSS of this chip, the 7th leg OSC1 and the 14th, 15,16 leg PA6, PA5, PA4.

The utility model is a kind of popular microcomputer instantaneous speech power that utilizes the speech synthesizer chip of the up-to-date release of Texas ,Usa instrument company to develop.The structure that this chip adopts sheet to carry 8-bit microprocessor, itself be exactly that a microprocessor adds the voice operation demonstrator system, it has circuit units such as CPU, ROM, RAM, imput output circuit and advanced speech compositor, voice operation demonstrator wherein adopts up-to-date linear predictive coding algorithm LPC-12, can be with the synthetic high-quality voice of low data rate, not only help saving memory span, and, the voice that it produced are more melodious more naturally than the speech chip of early model, and can keep required low bit rate.Because the phonetic synthesis of this speech chip directly by the control of the microprocessor in the sheet, forms a kind of complementary innovation structure that both unite two into one, and can predict that this chip will become the design and the developing direction of chipspeech from now on.The utility model is exactly to utilize this novel voice chip to link to each other with the printer interface control line of microcomputer, constitute the voice output control circuit of a hardware minimization, be aided with active audio amplifier again, form an instantaneous speech power of realizing purposes such as phonetic teaching, literal check and correction with microcomputer.This device circuit hardware configuration is realized simplified design, reliable operation, and voice legible, with low cost, can on " popular computer " that the applicant develops and produces, install and promote the use of.

Fig. 1 is that structure of the present utility model is formed synoptic diagram.

Fig. 2 is a control circuit electrical schematic diagram of the present utility model.

Referring to Fig. 1, the utility model is made up of printer interface cartridge 1 and control circuit (not shown) and active audio amplifier 2 in it, wherein printer interface cartridge 1 is the standard computer printing machine interface cartridge of common 25 pins, link to each other to connect by control circuit in the cartridge 1 and printer interface control and receive speech data and the control signal that microcomputer is exported, the treatment conversion of the chipspeech of the TSP50C1X series on the process control circuit becomes voice signal output, and sending into active source of sound 2 through transistor amplifier circuit again is exportable clear melodious voice signal.

Referring to an embodiment electrical schematic diagram shown in Figure 2.The control circuit is here selected the speech chip of TSPS5OC04 model for use.The 2nd pin in the printer interface 3～the 5th pin (four data output end) should link to each other with the 1st leg～the 4th leg PA3～PA0 of this chip, and the 6th pin (reset terminal) in the printer interface, the 7th pin (power end), the 8th pin (sheet choosing end), the 9th pin (read/write control end) then should be connected with the 6th leg INT, the 10th leg VDD, the 8th leg PB0, the 9th leg PB1 and the 13rd leg PA7 of this chip respectively with the 10th pin (state-detection end).The 11st leg DA2, the 12nd leg DA1 of this chip are speech output end, and its rear end is connected to the amplifying circuit of a transistor T, link to each other with active audio amplifier 2 by plug G again.The then whole ground connection of the 5th leg VSS of this chip, the 7th leg OSC1 and the 14th, 15,16 leg PA6, PA5, PA4.

Principle of work of the present utility model is: carry 8 bit CPUs because the speech chip that is adopted contains sheet, so it can pass through printer interface control line swap data with micro-mainframe computer.At first main frame sends speech data signal to the TSP5OC04 chip by its four DOL Data Output Line, send the request signal of sheet choosing and read/write control simultaneously again by PB0, the PB1 end of chip, this speech chip takes out data when mute state, decipher processing; And decode results deposited in the RAM data byte deposit, send the signal that data have received by PA7 simultaneously.Said process constantly repeats again and again, just can with a byte of a byte of speech data deposit in the RAM.When speech chip receives end mark, this chip just changes calculating, pronunciation state over to: voice operation demonstrator will be visited RAM and addressing relevant data byte respectively this moment, the data mode of data based LPC-12 of decoding is produced another data, and these data are exactly the initial sample of voice signal data.Compositor returns this voice signal to CPU then, arithmetical unit ALU among the CPU carries out interpolation processing to this signal, the another one data field that the signal that improves tonequality through interpolation processing is transferred to again among the RAM is temporary, change through D/A again, the digital quantity pulse modulated is formed simulating signal, through internal low pass filter output, just can drive active audio amplifier output voice signal through the transistor circuit amplification more again.

In a word, the utility model is to utilize the novel voice chip of Texas Instruments to succeed in developing, and not only can improve the phonetic synthesis quality, and compressed voice synthesizes desired memory space, and reduced peripheral components, make that circuit structure is simple, reliable operation and reduce manufacturing cost.

Claims (3)

1, a kind of instantaneous speech power of microcomputer printer interface, it is made up of printer interface cartridge and the control circuit in it, active audio amplifier, it is characterized in that: the control circuit in the printer interface cartridge is that the sheet that has by a Texas ,Usa instrument company (TEXAS) carries the transistor amplifier circuit that the speech synthesizer chip of microprocessor is connected with this chip rear end and constituted.

2, the instantaneous speech power of microcomputer printer interface as claimed in claim 1 is characterized in that: above-mentioned Texas ,Usa instrument company (TEXAS) to have the model that sheet carries the speech synthesizer chip of microprocessor be TSP50C1X series.

3, the instantaneous speech power of microcomputer printer interface as claimed in claim 2 is characterized in that: above-mentioned to have the model that sheet carries the speech synthesizer chip of microprocessor can be TSP50C1X series; The 2nd pin～the 5th pin in the printer interface should be connected with the 1st leg～the 4th leg PA3～PA1 of this chip at this moment, the 6th pin (reset terminal) of printer interface, the 7th pin (power end), the 8th pin (sheet choosing end) then should be connected with the 9th leg PB1 with the 6th leg INT, the 10th leg VDD, the 8th leg PB  of this chip respectively with the 9th pin (read/write control end), and the 10th pin in the printer interface (state-detection end) then is connected with the 13rd leg PA7 of this chip; The 11st leg DA2, the 12nd leg DA1 of this chip are speech output end, and its rear end is connected to a transistor amplifier circuit, and links to each other with active audio amplifier by plug; The then whole ground connection of the 5th leg VSS of this chip, the 7th leg OSC1 and the 14th, 15,16 leg PA6, PA5, PA4.

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