CN2233648Y - Piture-writing TV receiver using TV player - Google Patents

Abstract

The utility model relates to a picture-writing TV receiver, which comprises a high-frequency tuner, an intermediate frequency circuit, a frequency band selecting and tuning controller, a teletext decoding circuit, a TV game machine, a game card and a power circuit. The utility model is characterized in that a TV game machine, the game card frequency band selecting and tuning controller, and an interface circuit of the teletext decoding circuit are also comprised, wherein the TV game machine comprises a Chinese-English computer learning machine which takes the TV game machine as a core. The utility model has the advantages of no changing of an ordinary TV, displaying by the ordinary TV, easy installation, more functions and low cost, and is suitable for an ordinary household.

Description

The teletext receiver that utilizes electronic game machine to realize

The utility model relates to a kind of teletext receiving system, is to utilize electronic game machine specifically or is the teletext receiver that the Chinese and English computer learning machine of core is handled the teletext information that is received with the electronic game machine.

Teletext (Teletext) is multiplex's tranmission techniques of field of broadcast televisions, it is that various literal, graphical information are superimposed upon on the several rows of TV Field blanking interval with the form of digital signal, transmit simultaneously with normal broadcast television signal, its receiving equipment mainly is the television receiver that teletext decoder is installed.

Existing teletext receiver has three kinds: 1. type in the machine: increase the teletext decoding plate in general television set, utilize the vision signal of the TV signal receiving circuit output of television set inside, demodulating the teletext program image through the teletext decoding plate becomes the RGB tristimulus signals and send video amplifier circuit to show, this teletext receiver cost is minimum, there are not functions such as memory scan, be suitable for real-time reception, this teletext dash receiver, install comparatively complicated, being unsuitable for the general user installs additional general television set, can install additional general television set by the professional and technical personnel, or its product lot quantity be installed additional by television factory; 2. machine outer type: independently TV signal receiving unit, teletext decoding part, composite video signal coded portion and rf modulations part are arranged, it and general television set are relatively independent, just show teletext program with television set, this teletext receiver cost height, but do not need to change general television set, easy to connect; 3.PC card: computer teletext receiving card, be inserted in the expansion slot of computer, by computer to teletext information classify, multiple processing such as storage, demonstration, printing, retrieval, function is the most complete but a whole set of cost is the highest.

The purpose of this utility model is to utilize the television image processing capacity of electronic game machine, realizes that a kind of cost is low, teletext receiver easy for installation, flexible, powerful.

The purpose of this utility model is achieved in that a kind of teletext receiver that utilizes electronic game machine to realize, comprise high-frequency tuner (1), intermediate-frequency circuit (2), Frequency Band Selection and tuning controller (4), teletext decoding circuit (3), electronic game machine and game card (6), power circuit (7), wherein: described teletext receiving system also comprises electronic game machine and game card and Frequency Band Selection and tuning controller, the interface circuit of teletext decoding circuit (5), electronic game machine and game card are connected with Frequency Band Selection and tuning controller by interface circuit, realize the channel that TV signal is received, the selection of frequency range; Electronic game machine and game card are connected with the teletext decoding circuit by interface circuit, realize the control of teletext decoding circuit and reading of teletext data; Comprise central processing unit CPU and Graphics Processing Unit PPU in the described electronic game machine; Described game card comprises the procedure stores chip that has the teletext received processing program and has the storage chip of Chinese character dot matrix character library; It is characterized in that: above-mentioned interface circuit (5) comprises the two digit counter T that connect electronic game machine keyboard clock line CLK ₁With the triode BG that is connected electronic game machine keyboard data wiring LOAD ₁, wherein, two digit counter T ₁Signal end and clock line CLK join T ₁Terminal count output Q ₁, Q ₂Respectively with or the door G ₂, with the door G ₁Join, or door G ₂Output and the clock line SCL in the universal serial bus join, with door G ₁Output and R ₄C ₁Common and or the door G of the output of circuit ₃Input join, or the door G ₃Output and two digit counter T ₁Zero suppression end R join; Triode BG ₁Base terminal pass through resistance R ₃Join BG with the data line LOAD that packs into ₁Emitter terminal ground connection, BG ₁Collector terminal and Data In-Line DATA common with universal serial bus in data wire SDA join an above-mentioned or G ₂Output, BG ₁Collector terminal also respectively through resistance R ₁, R ₂With 5 ⁺Power end joins.

Electronic game machine in above-mentioned electronic game machine and the game card also comprises with the electronic game machine being the Chinese and English computer learning machine of core.

Above-mentioned Chinese and English computer learning machine also comprises keyboard, tapereader interface circuit, printer parallel interface, interface with floppy disk driver circuit, RS232C serial interface circuit except that comprising the existing part of electronic game machine.

In this programme, above-mentioned interface circuit can have two kinds of forms: a kind of form interface circuit is that control crank socket or the keyboard socket by electronic game machine is connected, and high-frequency tuner, intermediate-frequency circuit, Frequency Band Selection and tuning controller, teletext decoding circuit, interface circuit are relatively independent as a unit and electronic game machine and game card; Another kind of form interface circuit is to be connected with the internal bus of electronic game machine by game card, and high-frequency tuner, intermediate-frequency circuit, Frequency Band Selection and tuning controller, teletext decoding circuit, interface circuit are on game card.

Become intermediate-freuqncy signal from the radiofrequency signal of antenna socket input through high-frequency tuner, demodulate the video composite video signal through intermediate-frequency circuit again, partly demodulate teletext data through teletext decoding again, the teletext processing section of sending into electronic game machine and game card composition by interface circuit becomes the antenna socket that TV picture signal is delivered to television set, demonstrates teletext program by television set.

The utility model has the advantages that and made full use of electronic game machine and be the TV graphical disposal ability of the Chinese and English computer learning machine of core with the electronic game machine, realize a kind of teletext receiver, its existing machine outer type do not change television set, advantage easy for installation, the multiple Computer Processing function that the PC card is arranged again, and owing to utilized electronic game machine or be the Chinese and English computer learning machine of core with the electronic game machine, only TV signal receiving unit and teletext decoding part have been increased on its basis, so type is close in cost and the machine.

Provide embodiment of the present utility model below in conjunction with accompanying drawing.

The whole theory diagram of Fig. 1;

The interface circuit schematic diagram that Fig. 2 is connected with the control crank socket;

The interface circuit schematic diagram that Fig. 3 is connected with the internal bus of electronic game machine.

Among the figure: 1-high-frequency tuner, 2-frequency circuit; 3-Frequency Band Selection tuner control circuit; 4-teletext decoding circuit; 5-interface circuit; 6-electronic game machine and game card; 7-power circuit.

The entire block diagram that Fig. 1 has drawn the teletext receiving system that the utility model constitutes, wherein high-frequency tuner 1 and intermediate-frequency circuit 2 are used for the received RF TV signal, be converted into the normal video composite video signal.

Teletext decoding circuit 3 extracts teletext data line from the normal video composite video signal, become teletext data and be stored in the buffer storage, and I is provided ²The C universal serial bus conducts interviews to it.

The control data that Frequency Band Selection and tuning controller 4 are sent here by interface circuit 5 according to electronic game machine and game card 6 is selected the frequency range and the control tuning voltage of high-frequency tuner 1, to realize Frequency Band Selection, realize that this function can adopt frequency synthesis or D/A conversion to add approach such as Frequency Band Selection switch.Frequency synthesis can be adopted existing integrated circuits such as TSA5512; The D/A conversion adds the Frequency Band Selection switch and can adopt existing integrated circuits and discrete component to form, as utilizes AD7546 and peripheral cell to constitute.

Power circuit 7 is responsible for the each several part circuit supply voltage is provided: high-frequency tuner 1 required+33V tuning voltage; High-frequency tuner 1 and the required+12V voltage of intermediate-frequency circuit 2 work; Teletext decoding circuit 3 required+12V and+5V voltage; Interface circuit 5 required+5V voltages.Power circuit 7 can with transformer to the civil power step-down after rectification, filtering, after the integrated regulator voltage stabilizing, realize again.

Interface circuit 5 is used for Simulation with I ²The C serial bus protocol, electronic game machine and game card 6 simulate I by the control of interface circuit 5 ²The serial data signal line SDA of C universal serial bus and clock cable SCL.

Electronic game machine and game card 6 are by the selection of interface circuit 5 control received television signal channels, and control chart teletext decoding circuit 3 therefrom reads teletext data.Comprise central processing unit CPU and Graphics Processing Unit PPU in the electronic game machine; Comprise program storage and graphic dot matrix memory in the game card.

Electronic game machine in electronic game machine and the game card 6 can also be to be the Chinese and English computer learning machine of core with the electronic game machine.

Fig. 2 is the circuit theory diagrams by the interface circuit of the control crank socket realization of electronic game machine, five lines are arranged in the control crank socket of electronic game machine, except that+5V power supply and ground wire, also have clock line CLK, data pack into line LOAD, Data In-Line DATA, also comprise this five lines in the keyboard socket of electronic game machine, so pass through also available this circuit realization of interface circuit that the keyboard socket of electronic game machine is realized.Data In-Line DATA can do the serial data input, with I ²Data wire SDA in the C universal serial bus directly links to each other, and the data line LOAD that packs into can do serial data output, outputs to I after sending triode BG1 anti-phase by base resistance R3 ²On the data wire SDA in the C universal serial bus, so just can realize I ²The bi-directional data transmitting function of data wire SDA in the C universal serial bus.The pulsewidth of clock line CLK is narrow can not directly to realize I ²Therefore the function of clock line SCL in the C universal serial bus receives the input of two digit counter T1 to it, terminal count output Q0, the Q1 warp of T1 or door G2 output becoming I ²Clock line SCL in the C universal serial bus, terminal count output Q0, the Q1 of T1 through with Men Xiangyu after the power-on reset signal that produces with R4, C1 again by or door G3 mutually or after send the clear terminal R of two digit counter T1, per three pulses make I on the clock line CLK like this ²Clock line SCL in the C universal serial bus goes up and produces a high level pulse.Resistance R 1, R2 are I ²The data wire SDA of C universal serial bus and the pull-up resistor of clock line SCL.

Fig. 3 is the schematic diagram with the interface circuit of the internal bus realization of electronic game machine.The address bus of electronic game machine through decoder produce to select signal CS and bus be ready to signal RDY through with door G4 with after output, again with through the anti-phase read-write R/W of not gate G7 through with door G6 with after send the clock CLK input of d type flip flop T2, T3, any two bit data (as D0, D1) on the data/address bus are latched output by d type flip flop T2, T3; I is directly made in an output ²The clock line SCL of C universal serial bus; Another one is exported as I after base resistance R7, triode BG2 are anti-phase ²The data wire SDA of C universal serial bus.The address bus of electronic game machine through decoder produce to select signal CS and bus be ready to signal RDY through with door G4 with after output, again with read-write R/W through with door G5 with after output control the gating of triple gate G8, I ²The state of the data wire SDA of C universal serial bus is delivered on the data/address bus.Resistance R 5, R6 are I ²The data wire SDA of C universal serial bus and the pull-up resistor of clock line SCL.

Claims (4)

1, a kind of teletext receiver that utilizes electronic game machine to realize, comprise high-frequency tuner (1), intermediate-frequency circuit (2), Frequency Band Selection and tuning controller (4), teletext decoding circuit (3), electronic game machine and game card (6), power circuit (7), wherein: described teletext receiving system also comprises electronic game machine and game card and Frequency Band Selection and tuning controller, the interface circuit of teletext decoding circuit (5), electronic game machine and game card are connected with Frequency Band Selection and tuning controller by interface circuit, realize the channel that TV signal is received, the selection of frequency range; Electronic game machine and game card are connected with the teletext decoding circuit by interface circuit, realize the control of teletext decoding circuit and reading of teletext data; Comprise central processing unit CPU and Graphics Processing Unit PPU in the described electronic game machine; Described game card comprises the procedure stores chip that has the teletext received processing program and has the storage chip of Chinese character dot matrix character library; It is characterized in that: above-mentioned interface circuit (5) comprises the two digit counter T that connect electronic game machine keyboard clock line CLK ₁With the triode BG that is connected electronic game machine keyboard data wiring LOAD ₁, wherein, two digit counter T ₁Signal end and clock line CLK join T ₁Terminal count output Q ₁, Q ₂Respectively with or the door G ₂, with the door G ₁Join, or door G ₂Output and the clock line SCL in the universal serial bus join, with door G ₁Output and R ₄C ₁Common and or the door G of the output of circuit ₃Input join, or the door G ₃Output and two digit counter T ₁Zero suppression end R join; Triode BG ₁Base terminal pass through resistance R ₃Join BG with the data line LOAD that packs into ₁Emitter terminal ground connection, BG ₁Collector terminal and Data In-Line DATA common with universal serial bus in data wire SDA join an above-mentioned or G ₂Output, BG ₁Collector terminal also respectively through resistance R ₁, R ₂With 5 ⁺Power end joins.

2, the teletext receiver that utilizes electronic game machine to realize according to claim 1 is characterized in that: above-mentioned interface circuit (5) can also be comprise with the electronic game machine internal bus in selection signal end CS, be ready to signal and read RDA, read-write end R/W, data terminal D ₀, D ₁Be connected by data trigger T ₂, T ₃, with the door G ₄, G ₅, G ₆, not gate G ₇, triple gate G ₈, triode BG ₂The interface circuit that is constituted, wherein: select signal end CS, be ready to signal end RDY common with door G ₄Join, read-write end R/W is through not gate G ₇And G ₄Output with door G ₆Input join G ₆Output respectively with data trigger T ₂, T ₃Clock end CLK join T ₂, T ₃Data terminal separately with the D of bus ₀, D ₁End joins, T ₂Latch output through resistance R ₇With triode BG ₂Base terminal join BG ₂Emitter terminal ground connection, BG ₂Collector terminal divide three the tunnel, the one tunnel with triple gate G ₈Join, the other end is through resistance R ₅With 5 ⁺The V power end joins, and one tunnel data terminal SDA direct and universal serial bus joins again; T ₃The output that latchs divide two the tunnel, the one tunnel through resistance R ₆With 5 ⁺The V power end joins, and the other end is directly held with universal serial bus SCL and joined.

3, according to claim 1, the 2 described teletext receivers that utilize electronic game machine to realize, it is characterized in that: described electronic game machine also comprises with the electronic game machine being the Chinese and English computer learning machine of core.

4, according to claim 1, the 3 described teletext receivers that utilize electronic game machine to realize, it is characterized in that: described Chinese and English computer learning machine also comprises keyboard, tapereader interface circuit, printer parallel interface, interface with floppy disk driver circuit, RS232C serial interface circuit except that comprising the existing part of electronic game machine.

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