CN2227896Y - Large screen receiving and playback machine for radio calling information - Google Patents

Abstract

The utility model provides a device which can receive paging information, display the paging information on large screen displays (televisions, computers, etc.), store the paging information, and be matched with key cards. The utility model comprises a radio frequency receiving and demodulation circuit for paging information, a decoder, a central processing circuit, and a composite video signal forming circuit. The utility model can also be provided with a communication interface circuit and an externally inserted type key card. The central processing circuit converts data into a dot matrix, wherein, the data is stored in the central processing circuit. The dot matrix is written in the display memory of the composite video signal forming circuit, and initialization is carried out, and thereby, required composite video signals are formed. The required composite video signals can also be transmitted to a PC through the communication interface circuit. Convenience is provided for users, and paid service for large-screen receiving of radio paging information is realized.

Description

Radio call information large-screen receives player

The utility model relates to a kind of chromacoder of near-field transmission system.

Since the wireless paging station was as a kind of information source, it not only can provide the person-to-person communication service, also can flourishing various information, for example stock, futures, weather forecast etc.Yet these information all are to receive by Chinese beeper, because the screen size of Chinese beeper is restricted, can only shows a little information, and can't store.Need to show bulk information in the practicality and can store and preserve as data.

The purpose of this utility model is to provide energy paging receiving information, it can be gone up at large screen display (for example TV, computer) to show, store, and best configuration key card, receive so that realization is paid.

Scheme of the present utility model is that the information that will receive the wireless paging station is converted into vision signal, so that play on television set, or delivers to PC demonstration and storage by the communication interface circuit simultaneously.But the key card that peripheral hardware is made by integrated circuit.

The utility model comprises that mainly one receives radio call message pick-up and the demodulator circuit that amplification, mixing, demodulation become the serial POCSAG format signal under the base band with radio call information radiofrequency signal; One with serial POCSAG format signal decode, error correction, transform the decoder be reduced into data-signal and discern, the serial POCSAG format signal output of the input termination radio call message pick-up of decoder and demodulator circuit; A central processing circuit, the input interface circuit of central processing circuit connects the data output end of decoder; A composite video signal forms circuit, the input that composite video signal forms circuit is connected with the central processing unit of central processing circuit through data wire, address wire, the control line of central processing circuit, and composite video signal forms the composite video signal output termination external device of circuit.

Radio frequency receives with demodulator circuit and by antenna the radiofrequency signal that paging centers sends is received, and through amplification, mixing the radiofrequency signal demodulation is become the serial POCSAG format signal under the base band and gives decoder.Decoder with serial POCSAG format signal decode, error correction, transform and to be reduced into data, and send central processing circuit after these data are discerned.The data that central processing circuit is deposited its data memory (needing the code of character display or the coordinate figure of curve) change into dot matrix (forming above-mentioned character and curve), and write in the demonstration memory of composite video signal formation circuit.Central processing circuit also will form circuit to composite video signal and carry out initialization, make composite video signal form the requirement that capable field sync signal that circuit produces can satisfy television set, like this composite video signal formation circuit data conversion one-tenth that central processing circuit the is provided composite video signal that can on television set, show.

Also can establish the communication interface circuit and be connected with central processing circuit, central processing circuit is given PC broadcast or storage with the data of its data memory storage by the communication interface circuit.

Also can connect the outside plug type key card in addition, can make by integrated circuit at central processing circuit.

The utility model can receive the information of wireless paging station and at television set or/and play on the PC and storage, greatly make things convenient for the user.Adopt the notion of extrapolation key card again, realize the paid service that radio call information large-screen receives, to satisfy user's demand.

Fig. 1 is a composition frame chart of the present utility model.

Fig. 2 is an embodiment composition frame chart of the present utility model.

Fig. 3 is radio frequency reception of the present utility model and demodulator circuit, decoder, central processing circuit interface circuit and key card circuit theory diagrams.

Fig. 4 is central processing unit of the present utility model, address latch, memory under program, data memory, decoder and communication interface circuit theory diagrams.

Fig. 5 is that address latch and data buffer, dot matrix Chinese character ROM and composite video signal form circuit theory diagrams.

Fig. 6 is clock signal circuit figure.

Fig. 7 is the reset signal circuit diagram.

Fig. 8 is a HGC display card slot pin schematic diagram.

Embodiment: as Fig. 1, the utility model comprises that the radio frequency of paging information receives and demodulator circuit (1), decoder (2), central processing circuit (3) and composite video signal formation circuit (4).Radio frequency receives paging centers's radiofrequency signal amplification, the mixing that antenna is received with demodulator circuit (1), demodulation becomes the serial POCSAG format signal under the base band and gives decoder (2), decoder is with the decoding of serial POCSAG format signal, error correction, conversion is reduced into data, and these data are discerned, those useless data are not reacted, if distinguish it is desired data, then notify central processing circuit (3) to take away, and deposit it data memory of central processing circuit in.When need with the paging information that receives when televising, data being changed into TV signal, therefore, need form circuit (4) by the composite video signal that has that data wire, address wire, control line are attached thereto.The data that data memory in the central processing circuit is deposited are the coordinate figures that need the code of character display or will show curve, central processing circuit need change into the coordinate figure of these character codes or curve the dot matrix of forming these characters and curve, and it is write in the demonstration memory of composite video signal formation circuit.Central processing circuit also will carry out initialization to compound frequency waveshaping circuit, makes composite video signal form the row of circuit generation, the requirement that field sync signal can satisfy television set.Like this, composite video signal forms circuit just can content displayed change into composite video signal output, gives television set and shows.

As Fig. 2, if need on PC, play or when storing data, then central processing circuit sends data to PC by the communication interface circuit (5) that adds.But the key card (6) that is connected with central processing circuit of peripheral hardware also.

Fig. 3 to Fig. 8 provides the circuit theory diagrams of the utility model embodiment.

As Fig. 3, radio frequency reception and demodulator circuit are by the digital display pager dash receiver of music EK-2076, R ₁, D ₁～D ₃, R ₃～R ₈, Q ₁, Q ₂Deng composition, the serial POGSAC format signal of its generation is by Q ₂C utmost point output, Q ₁, Q ₂, R ₅～R ₈Be used for the switching signal level, the signal with Transistor-Transistor Logic level send decoder U ₁Transform the data be reduced into and by integrated circuit U through decoder ₃The extrapolation key card of making is through interface circuit U ₂Give host CPU U ₄, U ₁The P34 mouth meet U ₄INTO end, be used for producing and interrupt to host CPU, notice is taken data away U ₁P35 mouth and U ₄P1,5 mouthfuls link to each other, as with U ₄Communication hold horizontal line, U ₄Utilize P1,5 mouthfuls to notify U ₁Peek finishes.U ₁P ₁Mouth and U ₂The PB mouth link to each other, be used for to U ₄Transmit data.Key card has certain valid expiration date, and paging centers can be with this machine and key card systems selling, and player does not have plug-in card as if detecting, and perhaps key card is expired promptly quits work, and that is to say, needs the effective key card of extrapolation to work.So the user needs to pay certain service charge and exchange new key card for to paging centers in accordance with regulations could continue to use, thereby realizes the paid service of paging centers.

As Fig. 3～8, central processing circuit is by interface circuit U ₂, central processing unit U ₄, address latch U ₅, memory under program U ₆, data memory U ₇, decoder U ₈, clock signal and reset signal circuit U ₉(and auxiliary circuit), address latch and data buffer U ₁₀, dot matrix Chinese character ROM U ₁₁Deng composition.

U ₄Pass through U ₂From U ₁The data that obtain are placed on U ₇(RAM) in, U ₆Be used to deposit U ₄Program.U ₄Arrive U etc. deposit data ₇After, need convert it into TV signal or send PC to.It is to utilize the display card " HGC display card " of 22 frequency monochrome displays with high degree of compatibility to realize that the utility model becomes data into TV signal.U ₄The HGC display card is initialized to graphics mode,, can makes its generation meet the capable field sync signal of television set requirement by the number of characters of level and vertical demonstration is set.

U ₂8255 PB mouth links to each other, and is used for transmitting data to 8031.8031 from U ₁The data that receive are placed on RAM U ₇In 6264.U ₆2764 are used for depositing 8031 program.

U ₄8031 with deposit data to RAM U ₇After 6264, need convert it into TV signal and on television set, play or send to PC, on PC, play or store.

It is to utilize the display card HGC display card of the double frequency monochrome display with high degree of compatibility to realize that this machine becomes data into TV signal.The HGC display card has the advantage of cost low (tens of yuan), high degree of compatibility, and very high cost performance is arranged.U ₄8031 are initialized to graphics mode with the HGC display card, by the number of characters of level and vertical demonstration is set, can make its generation meet the row of television set requirement, field synchronization.

The data memory storage is the code of required character display or the coordinate of curve in the central processing circuit, central processing unit 8031 converts it into the dot matrix that constitutes character or curve, and it is write the relevant position of the demonstration memory of HGC display card, generate vision signal by the HGC display card.The row that the HGC display card is sent, field synchronization and vision signal are delivered to R ₂₂～R ₂₈, Q ₆, Q ₇And U ₁₂Formed composite video signal.R ₂₂, R ₂₃, Q ₆Be used for row anti-phase synchronously, with door U ₁₂74LS08 is used for row is reached the synthetic composite synchronizing signal of field synchronization, R synchronously ₂₄～R ₂₈, Q ₇Be used for composite synchronizing signal and the synthetic composite video signal of vision signal.U ₁₁Be 16 * 16 dot matrix Chinese character ROM of 2M position, be used to provide the required dot matrix of demonstration Chinese character.U ₁₀Be used for latch address and data buffering, for dot matrix Chinese character ROM and HGC provide address wire and data wire.8031 P16, P17 mouth provide two the highest bit address for dot matrix Chinese character ROM.The display random access memory address of HGC display card is BOOOOH-BFFFFH, accounts for the 64K byte, and low 16 bit address provide by 8255, and high four bit address are according to its address requirement, and SA16, SA17, SA19 are set to high level, and SA18 is set to low level.U ₄P10-P14 mouth be used for producing IO read-write, MEMERY read-write and the Chinese character ROM U of HGC display card ₁₁Read signal and chip selection signal.C ₁, C ₂, C ₃, R ₁₉, R ₂₀, U _9/A, U _9/6, the oscillating circuit formed of 6M crystal oscillator is used to provide U ₄And U ₁, U ₃Clock.R ₂₁, D ₅, E ₁, U _9/CBe used for producing the RESET signal.

The communication interface circuit adopts serial communication mode, by R ₁₂～R ₁₈, D ₄, Q ₃～Q ₅Constitute serial interface circuit, RS232 be provided interface, so as with the PC communication.

The used key card of this machine is by U ₃(89C251) make.89C251 and U ₄(8031) pass through U ₂PC mouth high four and PA oral sex change data, the FLASH of band 2K in its sheet is used for the storage program, and encryption function is arranged.And, can carry out computing to data as CPU, therefore, encryption performance is good, is difficult for decoding, and can significantly reduce to forge the loss that card causes.At U ₃FLASH in have a kind of algorithm, according to this algorithm, U ₃The data that central processing unit is sent here are carried out computing, give central processing unit with operation result again, central processing unit is to U ₃, the data of sending here are judged, if the data of sending here meet the demands, think that then key card is effective, the circuit operate as normal.If the data of sending here do not meet the demands or do not receive data, distinguish that then key card is expired or do not have plug-in card, circuit quits work.Central processing unit is sent by paging centers to the data of key card transmission and the check value of operation result thereof, change once at set intervals, the algorithm that changes in the key card of back also must corresponding making alterations, and can meet the demands so that its foldback returns the data of central processing unit.

Claims (2)

1. radio call information large-screen receives player, comprises that one receives radio call message pick-up and the demodulator circuit that amplification, mixing, demodulation become the serial POCSAG format signal under the base band with radio call information radiofrequency signal; One with the decoder that serial POCSAG format signal is decoded, error correction, conversion are reduced into data-signal and discern, the serial POCSAG format signal output of the input termination radio call message pick-up of decoder and demodulator circuit; A central processing circuit, the input interface circuit of central processing circuit connects the data output end of decoder, it is characterized in that being provided with composite video signal and form circuit, the input that composite video signal forms circuit is connected with the central processing unit of central processing circuit through data wire, address wire, the control line of central processing circuit, and composite video signal forms the composite video signal output termination external device of circuit.

2. radio call information large-screen as claimed in claim 1 receives player, it is characterized in that connecing key card in addition at central processing circuit, key card is made up of integrated circuit 89C251, the data-interface of 89C251 through the interface circuit PC of central processing circuit mouth high four with the PA mouth after be connected with central processing unit.

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