CN100362857C - wireless audiovisual television receiver - Google Patents

Abstract

The invention discloses a wireless audio-visual television receiver, which realizes the wireless connection between the television and audio-visual equipment by independently setting a wireless transmitting box outside the television and setting a matching wireless receiving board inside. The wireless transmitting box receives the audio and video signals output by the peripheral media display terminal, and transmits them through the antenna after processing, and then is received by the wireless receiving board in the TV to convert them into corresponding audio signals and brightness/color signals. The high-speed signal is reproduced on this machine, so that users can enjoy the wonderful programs played by TV stations, VCRs, VCDs, and DVDs without connecting any signal lines to this machine, making the whole home look neat and simple, and truly realizing The TV can be placed at will.

Description

wireless audiovisual television receiver

technical field

The invention relates to an improvement of a television circuit, in particular to a television circuit for enabling a liquid crystal television to realize wireless audio-visual reception.

Background technique

With the rapid development of the integrated circuit industry and the rapid emergence of new technologies and new products, color TV sets have also developed from the original one that can only receive a single TV signal to external video recorders, VCD players, DVD players and other functions. Media display terminals, but more and more audio and video cables have brought inconvenience to people, especially for popular high-end TV products, such as LCD TVs, when we hang them on On the wall, the connection between the TV and audio-visual equipment is cumbersome and messy, which affects the appearance of the entire home. The previous patent with the notification number CN2552269Y discloses a transmission and reception control device for a wireless audio-visual display device, which receives audio and video signals from a DVD player by setting a wireless audio-visual transmitting module, and transmits them through an antenna after being processed by an internal circuit. Going out; adding a receiving module in the display for wireless reception, and then realizing the playback and output of the contents of the video disc player in the display. However, the prior patented technology can only realize the wireless transmission and wireless reception functions of the content in the DVD player, video camera or video recorder. For the TV programs broadcast by the TV station, due to the lack of necessary radio frequency signal access and processing modules, it is impossible to realize the TV Program wireless transmission and reception functions.

Contents of the invention

In order to solve the problem that the wireless transmission and reception of TV programs cannot be realized in the prior art, the present invention provides a wireless audio-visual TV receiver, which not only realizes the wireless connection between the TV and other audio-visual When connecting any signal line, you can enjoy the wonderful programs played by the TV station, so that the whole home looks simple and beautiful.

In order to solve the above technical problems, the utility model is realized through the following technical solutions:

A wireless audio-visual television receiver, in which a wireless transmitting box is independently arranged outside the television, and a wireless receiving board matched with the transmitting box is additionally provided inside the television; the transmitting box receives audio, audio, and The video signal is processed and transmitted through the antenna; the wireless receiving board receives the signal sent by the transmitting box and converts it into a corresponding audio signal and brightness/chromaticity signal for display by the TV; on the wireless transmitting box A radio frequency input terminal is provided, and the radio frequency input terminal is connected with a wired signal line to receive a radio frequency television signal sent by a TV station.

As a preferred embodiment of the present invention, the wireless transmitting box is provided with an S terminal and an AV terminal that can be connected to the peripheral media display terminal, and the radio frequency input terminal converts the radio frequency television signal sent by the TV station into a composite video signal and audio carrier signal output; the S terminal and the AV terminal are connected with the peripheral media display terminal, respectively receive the brightness/chromaticity signal and composite video and audio signals output by it; the composite video signal output by the radio frequency input terminal, the S terminal The output luminance/chrominance signal and the composite video signal output by the AV terminal are encoded by a video digital encoding chip, and then output to a data compression chip; the audio signal carrier signal output by the radio frequency input terminal and the audio signal output by the AV terminal After the audio processing chip is decoded, it is output to an audio encoding chip for digital encoding through analog-to-digital conversion, and the encoded digital signal is sent to the data compression chip, which is compressed and processed together with the video digital encoding signal into compressed data in MPEG2 format Under the control of the central processing unit, it is transmitted through the wireless network card through the antenna.

As another preferred embodiment of the present invention, in the wireless receiving board, the wireless network card receives the compressed data sent by the transmitting box through the antenna, and outputs it to a data decompression chip under the control of the central processing unit, and compresses the data The audio signal and video signal decoded into digital format, wherein, the video signal is decoded by a video decoding chip into a brightness/chromaticity signal and enters into an S terminal of the TV; the audio signal is decoded into an analog audio signal by an audio decoding chip Enter the TV audio input terminal corresponding to the S terminal, and the TV drives the monitor to display video images according to the input brightness/chroma signal and audio signal.

As a further limitation to the first preferred embodiment, in the wireless transmitting box, the central processing unit is connected with a remote control receiver, and the remote control receiver is connected in parallel with the remote control circuit of the TV set to realize wireless transmission. The selection of the input signal source at the transmitting box end; the selection menu is provided by a menu display chip, which is connected with the video decoding chip; the data compression encoding chip is connected with an SDRAM memory, and stores the compression of the MPEG2 format of its output Data; the central processing unit is connected with a flash memory FLASH chip, and the driver program of each chip on the entire launch board is stored in the FLASH chip.

As a further limitation to the second preferred embodiment, in the wireless receiving board, the data decompression chip is connected with an SDRAM memory, and stores its decoded audio and video signals; the central processing unit is connected with a flash memory FLASH chip , storing the drivers of each chip on the entire receiving board in the FLASH chip.

Compared with the prior art, the advantages and positive effects of the present invention are: the present invention independently sets a wireless transmitting box outside the TV set, and sets a matching wireless receiving board inside, and receives the audio output from the TV station and peripheral media display terminals through the transmitting box , video signal, and after it is processed, it is transmitted through the antenna, and then received by the wireless receiving board in the TV, which is converted into the corresponding audio signal and brightness/chromaticity signal and reproduced on the machine, thus realizing the TV The wireless connection between the machine and the radio frequency signal line and audio-visual equipment enables users to enjoy the wonderful programs played by the TV station or video recorder, VCD, and DVD player without connecting any signal lines to the machine, thus making the whole home look simple and truly The TV can be moved as one wishes and placed arbitrarily.

Description of drawings

Fig. 1 is the block diagram of the circuit principle of wireless transmitting box of the present invention;

Fig. 2 is the circuit schematic block diagram of the built-in wireless receiving board of the TV set of the present invention;

Fig. 3 is a functional block diagram of the audio and video signal display circuit inside the TV set of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the schematic block diagram of the circuit of wireless transmission box of the present invention, is provided with radio frequency input terminal tuner, S-Video input terminal and two-way AV input terminal on wireless transmission box, described radio frequency input terminal is connected with wired signal line, After the radio frequency TV signal sent by the TV station is internally tuned, mixed, placed, detected, and discriminated, the composite video signal and the audio carrier signal are respectively output; the S-Video terminal and the AV terminal are connected with peripheral media display terminals such as video recorders , VCD machine or DVD machine are connected to receive the output brightness/chrominance signal Y/C and composite video and audio signals respectively. Among them, the composite video signal output by the RF input terminal, the Y/C signal output by the S-Video terminal, and the composite video signal output by the AV terminal are encoded by the video digital encoding chip SAA7115H, and then output to the data compression chip uPD61051; and the RF input terminal The output audio carrier signal and the audio signals output by the two AV terminals enter an audio processing chip MSP3450, and the audio processing chip MSP3450 decodes the input stereo audio signals, and then outputs them to the audio coding chip PCM1800E through analog-to-digital conversion Perform digital encoding, and transmit the encoded digital audio signal to the data compression chip uPD61051. The data compression chip uPD61051 compresses the received digital audio signal and video signal together into compressed data in MPEG2 format, which is stored in a 64M SDRAM memory chip. The flash memory FLASH chip stores the drivers of each chip on the entire launch board. After the launch box is powered on, the control power is handed over to the central processor TF-530. Under its control, the compressed data in MPEG2 format is passed through the wireless network card. The antenna transmits out, thus completing the signal transmission process.

Fig. 2 is a schematic block diagram of the circuit of the built-in wireless receiving board of the TV set of the present invention. On the TV side, after the wireless transmission system is successfully connected, the antenna of the wireless receiving board receives the compressed data in MPEG2 format transmitted from the transmitting end, and under the control of the central processing unit TF-530, the data decompression chip uPD61051 decodes it into Video signal and audio signal in digital format (uPD61051 chip is reversible for data compression and decoding in MPEG2 format). Among them, the digital video signal is decoded by the video decoding chip ADV7177 into a brightness/chroma signal Y/C and enters into one S-VIDEO terminal of the TV; the digital audio signal is decoded into an analog audio signal by the audio decoding chip PCM1740 and enters into the S-VIDEO terminal. -VIDEO terminal corresponding to the TV audio input terminal, so as to complete the wireless input of the TV signal.

In addition, there is a remote control receiving signal processing pin in the central processor chip of the wireless receiving board, which is connected in parallel with the remote control circuit of the TV set. Taiwan, system conversion and other functions. Among them, the menu of the wireless part is provided and displayed by the menu display chip T8570D.

Fig. 3 is a functional block diagram of the audio and video signal display circuit inside the TV set of the present invention, taking a liquid crystal TV as an example. The brightness/chromaticity signal sent by the receiving board enters the analog-to-digital conversion decoding chip VPC3230D through the wireless S-VIDEO connection, converts the analog signal into a digital signal and enters the central processing unit Gm1501 inside the LCD TV, and then drives the LCD screen display. The audio signal sent by the receiving board is decoded by the audio processing chip MSP3450, and then amplified by the power amplifier chip TDA7266B to drive the speaker output, thus completing the reproduction of the audio and video signal on the LCD TV. The other functions of this machine are the same as those of ordinary color LCD TVs.

The present invention realizes the wireless audio-visual function of the color TV by adopting the above circuit structure, and the circuit can not only be applied to the current liquid crystal TV, but also be applicable to other types of color TVs such as plasma. Of course, the above descriptions are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention shall also belong to protection scope of the present invention.

Claims (10)

1. wireless audiovisual television receiver, at the outside wireless transmission box that independently is provided with of described television set, television set inside has additional one and the supporting wireless receiving plate of described launch-box; Described launch-box receives audio frequency, the vision signal of peripheral media display terminal output, with its processing after antenna launch; Described wireless receiving plate receives the signal that launch-box sends, and the signal-powered machine of looking of corresponding audio signal and brightness/chroma that converts it into shows; It is characterized in that: described wireless transmission box is provided with rf input terminal, and described rf input terminal links to each other with the wire signal line, receives the radio television signal that TV station sends.

2. wireless audiovisual television receiver according to claim 1 is characterized in that: described wireless transmission box is provided with the S terminal and the AV terminal that can link to each other with the peripheral media display terminal.

3. wireless audiovisual television receiver according to claim 2 is characterized in that: the radio television signal that described rf input terminal sends TV station changes into composite video signal and the output of sound carrier signal; Described S terminal links to each other with the peripheral media display terminal with AV terminal, receives the brightness/chroma signal of its output and composite video, audio signal respectively; The composite video signal of the brightness/chroma signal of the composite video signal of described rf input terminal output, the output of S terminal and AV terminal output is exported to a data compression chip behind digital video coding chip coding; The audio signal of the sound carrier signal of described rf input terminal output and AV terminal output is after Audio Processing chip decoding, export to an audio encoding chip through analog-to-digital conversion and carry out digital coding, and the digital signal after will encoding sends described data compression chip to, with the digital video code signal together compress be processed into the MPEG2 form packed data under the control of central processing unit, launch through antenna by wireless network card.

4. according to claim 1 or 2 or 3 described wireless audiovisual television receivers, it is characterized in that: wireless network card receives the packed data that described launch-box sends by antenna in described wireless receiving plate, under the control of central processing unit, export to a data decompression shrinking chip, packed data is decoded into the audio signal and the vision signal of number format, wherein, vision signal is decoded into the road S terminal that the brightness/chroma signal enters into television set through a video decoding chip; Audio signal then is decoded into simulated audio signal by an audio decoder chip and enters into and the corresponding tv audio input terminal of S terminal, and television set shows tv screen according to the brightness/chroma signal and the audio-signal-driven display of input.

5. wireless audiovisual television receiver according to claim 4, it is characterized in that: in described wireless receiving plate, the remote control circuit that the remote control of central processing unit receives pin and this machine of television set is in parallel, and realization is to the selection of wireless transmission box end input signal source and finish and search functions such as platform, system conversion under the radio frequency; Described choice menus is provided by a menu display chip, and it links to each other with described video decoding chip.

6. wireless audiovisual television receiver according to claim 3 is characterized in that: in described wireless transmission box, the data compression coding chip links to each other with a SDRAM memory, stores the packed data of the MPEG2 form of its output.

7. wireless audiovisual television receiver according to claim 3 is characterized in that: in described wireless transmission box, central processing unit links to each other with a flash memory FLASH chip, the driver of each chip on the whole expelling plate of storage in described FLASH chip.

8. wireless audiovisual television receiver according to claim 4 is characterized in that: in described wireless receiving plate, the data decompression shrinking chip links to each other with a SDRAM memory, stores its decoded sound, vision signal.

9. wireless audiovisual television receiver according to claim 4 is characterized in that: in described wireless receiving plate, central processing unit links to each other with a flash memory FLASH chip, the driver of each chip on the whole dash receiver of storage in described FLASH chip.

10. wireless audiovisual television receiver according to claim 3, it is characterized in that: in described wireless transmission box, the model of digital video coding chip is SAA7115H, the model of Audio Processing chip is MSP3450, the model of audio encoding chip is PCM1800E, the model of data compression chip is uPD61051, and it is the chip realization of TF-530 that central processing unit adopts a model; In described wireless receiving plate, the model of data decompression shrinking chip is uPD61051, and the model of video decoding chip is ADV7177, and the model of audio decoder chip is PCM1740, and it is the chip realization of TF-530 that central processing unit adopts a model.

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