WO1995020219A1 - A device for controlling the outputting of voice - Google Patents

Abstract

A device for controlling the outputting of voice comprises a microcomputer, a playback unit with the functional card of four-channel logical selecting replay and the control card between the microcomputer and the playback unit. According to the outputting control information included in the outputting control information that mixingly recorded together with the voice information on cassette, the device controls the outputing of the voice information and the data information. The control card has a microprocessor to be the control part. The communications are controlled by a control softward and the operation of the playback unit is managed by the orders send by the computer.

Description

 TECHNICAL FIELD

 The present invention relates to a control device, in particular to a control device for a four-track logic selective re-listening function card type playback core. technical background

 The four-track logic selection and replay function cassette type playback core is composed of a motor, two upper electromagnetic coil control levers, a head loading state switch, a tape direction switch, a tape entry and exit state switch, and a mechanical part. The two electromagnetic wires 圏 are energized or de-energized to attract or release the control lever to control the loading of the magnetic head, the direction of the tape, the normal or fast tape, and the movement of the movement is controlled by the control circuit. At present, a cassette tape capable of recording voice information and data information at the same time, when the voice information and the data information are output, the existing control device cannot control the output of the voice information and the data information as needed, and the control circuit cannot detect the correctness of the output content. It may cause the output content to be inconsistent with the requirements. Disclosure of invention

 The object of the present invention is to address the above-mentioned shortcomings, and propose a voice output control device that can control the output of voice information and data information as needed, and can detect the correctness of the output content.

 The invention includes a microcomputer, a four-track logic selection and replay function card type playback movement core, a four-track logic selection and replay function card type playback core control card, and a movement control software stored in a piece of EPR0M on the control card; The movement and the control card are connected through a control line, and the control card and the microcomputer communicate with each other through the microcomputer's I / O bus; it uses the microcomputer to control the movement of the four-track logic selection and replay function card-type playback movement through the movement control card. And the output of voice information and data information in conjunction with voice information. The cassette tape used is a cassette tape which records voice information and data information on different magnetic recording tracks, one of which is used as a voice track to record natural voice information; the other track is used as a data track, which is encoded after The digital signal format records voice-related data information. Data information is data that is controlled and output in conjunction with voice information.

Four-track logic selection and re-listening function card-type playback movement control card includes single-chip microcomputer U4, digital signal processing circuit composed of two-stage amplification circuits U8C, U8D, voice signal amplification circuit composed of two-stage amplification circuits U8 U8B, volume control Circuit U11 and includes decoder U2 and register U3, U5]: / O port control circuit;

The data track signal of the magnetic tape is sent to the microcontroller U ⁴ through the amplification circuit U ⁸ C and USD;

 The voice track signal is sent to the volume control circuit U11 via the amplification circuit U8A ^ U8B;

 The microcontroller U4 is connected to the volume control circuit through the volume control line, and is connected to the movement through the control line;

 The register U5 of the I / O port control circuit is connected to the data bus of the microcontroller U4, the register U5 is connected to the register U3 by the data bus, and the decoder U2 is connected to U5.

 The signal of the data track of the magnetic tape is read out by the U8D op amp in the digital signal processing circuit, and is amplified and formed into a square wave signal to be processed by the single-chip microcomputer. Read it out and send it to the speaker. Brief description of the drawings

 The present invention is further described in detail with reference to the drawings:

 FIG. 1 is a structural block diagram of the present invention;

 Figure 2-1, Figure 2-2, Figure 2-3, Figure 2-4, Figure 2-5 is the electrical schematic diagram of the control card; Figure 3 is a flowchart of the control software of the present invention. Way of carrying out the invention

 As shown in FIG. 1, the present invention is composed of a movement core, a control card, a microcomputer, and control card software. The movement core and the control card are connected through a control line, and the control card and the microcomputer communicate with each other through a microcomputer bus. The data information is transmitted to the microcomputer, and the status information of the movement is also fed back to the microcomputer.

 As shown in Fig. 2, Fig. 2 is assembled from Fig. 2-1, Fig. 2-2, Fig. 2-3, Fig. 2-4, and Fig. 2-5. The control card 8031 single-chip microcomputer is the core, including digital signal processing circuit, Voice signal amplifier circuit, volume control circuit and I / O port control circuit.

 As shown in Figure 2-1, Figure 2-2, Figure 2-3, Figure 2-4, Figure 2-5:

1. It is a digital signal processing circuit, which is composed of op amp TLO ⁸⁴ (U8C, U8D) and some additional resistors, capacitors and other components. When the movement is in the playback state, the magnetic head read signal passes through the shielded wire, C7, U8C : U8D is sent to pin 8 of 8031, which amplifies and reshapes the signal on the data track of the tape into a square wave signal and sends it to the microcontroller for processing.

 2. It is a speech signal amplifier circuit, which is composed of op amps TL0S4 (U8A, U8B), volume control circuit TBA820 (U11), and some additional resistors and capacitors. Among them, 118 U8B and peripheral circuits constitute a two-stage universal amplifier. The weak voice signal on the tape is shielded to C4,

Replacement page (Article 26) After being sent to U8A for amplification, U8B sends the volume control circuit U11 for further amplification, and U11 pushes the speaker through C13 to make a sound.

3, is a single-chip microcomputer subsystem, which is composed of a single-chip microcomputer 8031 (U4), 74LS373 (U1), EPR0M2764 (U6), and a piece of GAL20V8 (U ⁷ ), Ul is an address latch, which latches the lower eight bits of the single-chip computer U4; U7 For the drive circuit of the playback core, the U7 is used to control the U7 to complete the mechanical actions such as tape transport, fast forward, fast reverse, and stop by the control line. U6 is a 8KX 8 EPROM ^ This device reads the signal Fetch program, movement control program, and interface program for communication with microcomputer.

 4. I / O port control circuit, consisting of GAL20V8 (U2), 74LS374 (U3, U5), IB is a command register, and commands issued by the microcomputer (such as tape transport, fast forward, fast rewind, etc.) are stored first via the data bus In this register 74LS374 (U3), the microcontroller receives commands from this register and executes the corresponding actions; U5 is the data register, and the data read from the tape by the microcontroller is stored in this register for the computer to read; U2 is the address decoder, choose the appropriate microcomputer I / O ports operate on this control card.

 When the control card receives a playback command from the microcomputer, the voice information recorded on the tape's voice track is read, amplified, and sent to the speaker by a voice signal amplification circuit composed of TL084 (U8A ^ U8B), TBA820 (Ull); The data information recorded on the data track of the magnetic tape is read out by a digital signal processing circuit composed of TL084 (U8C. U8D), which is amplified, shaped, and converted into a square wave signal to be sent to the microcontroller.

 After receiving the data from the control card, the microcomputer sends fast-forward, fast-reverse, pause, tape changeover, fast search for the content to be played and playback to the control card, and can control the amplification of the voice amplifier circuit to adjust. volume.

 The quick search and playback of the content to be broadcast is based on the principle of the shortest time positioning the magnetic head at the beginning of the content to be broadcast, and the movement enters the playback state.

 Briefly describe its control process:

 (1) The microcomputer sends a command to the register (such as the playback command). The 8031 reads from this register and controls the movement to generate corresponding actions.

 (2) During playback, the information read by the SO from the data track is immediately sent to the data register for reading by the microcomputer.

(3) Synchronous transmission process: Because synchronized data information is recorded on the tape, the 8031 reads the information from the data track and sends it to the data register. After receiving the information, the microcomputer performs the corresponding actions. Industrial applicability The present invention has great advantages when combined with multi-disciplinary audio-visual education software. Firstly, the teaching method of ordinary TV universities is not limited by fixed time, and it is easy to repeat the learning process at will. Secondly, the speaker output is completely natural language, non-mechanical language, which is conducive to language learning. In addition, the voice information and data information are output synchronously, so that the audio-visual education computer system is full of sound and image, improving the teaching quality, and can also arbitrarily position the tape content and arbitrarily specify the content to be played. Finally, due to the use of cassette tapes To record the voice signal, which eliminates the disadvantages of large amount of multimedia voice processing data and high cost, and is easy to popularize.

Claims

Claim

1. A voice output control device, including a microcomputer, a four-track logic selective replay function, a card-type playback movement,

 It is characterized by a four-track logic selection and listening function card-type playback movement control card. The control card is connected to the microcomputer through an I / O bus, and the control card is connected to the movement through a control line.

2. The voice output control device according to claim 1,

 It is characterized in that the four-track logic selection and listening function card-type playback movement control card includes a single-chip microcomputer ϋ4, a digital signal processing circuit composed of two-stage amplifier circuits U8C, U8D, and a two-stage amplifier circuit U8A ^ U8B. Voice signal amplifying circuit, volume control circuit U11, and including decoder U2 and registers U3 and U5: L / 0 port control circuit;

 The data track signal of the magnetic tape is sent to the microcontroller U4 through the amplification circuits U8C and U8D;

 The voice track signal is sent to the volume control circuit U11 via the amplification circuit U8 U8B;

 The microcontroller U4 is connected to the volume control circuit through the volume control line, and is connected to the movement through the control line;

The register U5 of the I / O port control circuit is connected to the data bus of the microcontroller U4, the register U5 is connected to the register u ³ by the data bus, and the decoder u ^{2 is} connected to us.