CN102006432A - Device, terminal and method for transmitting RF audio/video signals - Google Patents
Device, terminal and method for transmitting RF audio/video signals Download PDFInfo
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Abstract
本发明公开了一种发射射频(RF)音视频信号的装置，包括：音视频输出模块、音视频转换控制模块、RF音视频信号调制模块、RF发射模块；其中，音视频转换控制模块，用于对来自音视频输出模块的音视频信号进行转换控制，经过转换控制后的音视频信号由RF音视频信号调制模块调制成RF音视频信号，再通过RF发射模块发射。本发明还相应地公开了一种发射RF音视频信号的终端及方法。通过本发明，无线上网电子终端设备采用发射RF音视频信号方案后，在室内，可以支持与电视机无线传输音视频信号，实现无线显示功能，从而扩大了无线上网电子终端设备的应用范围。
The invention discloses a device for transmitting radio frequency (RF) audio and video signals, comprising: an audio and video output module, an audio and video conversion control module, an RF audio and video signal modulation module, and an RF transmission module; wherein, the audio and video conversion control module uses In order to convert and control the audio and video signals from the audio and video output module, the converted and controlled audio and video signals are modulated into RF audio and video signals by the RF audio and video signal modulation module, and then transmitted through the RF transmitting module. The invention also correspondingly discloses a terminal and method for transmitting RF audio and video signals. Through the present invention, after the wireless Internet access electronic terminal equipment adopts the scheme of transmitting RF audio and video signals, it can support the wireless transmission of audio and video signals with the TV set indoors to realize the wireless display function, thereby expanding the application range of the wireless Internet access electronic terminal equipment.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a device, a terminal, and a method for transmitting Radio Frequency (RF) audio/video signals.
Background
As the most common video connection method, the RF antenna and the Radio Frequency (RF) interface used by the analog closed circuit connected television set can simultaneously transmit analog video and audio signals. For the video and audio mixed coded signals transmitted by the RF interface, the circuit of the display device can perform a series of separation, decoding and outputting imaging on the mixed coded signals.
At present, in the application of the RF wireless transmission technology, there is mainly a television signal transmitting tower of a broadcast station, and a home television can receive a television program signal through a self-contained antenna. However, the existing wireless internet electronic terminal device cannot transmit RF audio/video signals temporarily, so that it cannot support wireless transmission of audio/video signals with a television, which affects the application range of the wireless internet electronic terminal device.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a device, a terminal and a method for transmitting RF audio/video signals, which enable a wireless internet electronic terminal device to transmit RF audio/video signals, thereby expanding the application range of the wireless internet electronic terminal device.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an apparatus for transmitting RF audio-video signals, comprising: the device comprises an audio and video output module, an audio and video conversion control module, an RF audio and video signal modulation module and an RF transmitting module; wherein,
the audio/video output module is used for outputting audio/video signals needing RF transmission to the audio/video conversion control module;
the audio/video conversion control module is used for performing conversion control on the audio/video signals from the audio/video output module;
the RF audio and video signal modulation module is used for modulating the audio and video signals which are converted and controlled by the audio and video conversion control module into RF audio and video signals;
and the RF transmitting module is used for carrying out RF transmission on the RF audio and video signals modulated by the RF audio and video signal modulating module.
The audio and video conversion control module performs conversion control on the audio and video signals from the audio and video output module to: carrying out audio operational amplification and filtering on the received audio signal, modulating the audio signal into FM or AM audio, and carrying out denoising processing on the received video signal;
the RF audio and video signal modulation module modulates the audio and video signals after the conversion control into RF audio and video signals, and the RF audio and video signal modulation module is characterized in that: and modulating the audio signal and the video signal processed by the audio/video conversion control module to form an RF audio/video signal.
The device also comprises a user interaction module which is used for informing the audio and video output module to output corresponding audio and video according to the user operation.
A terminal for transmitting RF audio video signals, comprising means for transmitting RF audio video signals, said means for transmitting RF audio video signals further comprising: the device comprises an audio and video output module, an audio and video conversion control module, an RF audio and video signal modulation module and an RF transmitting module; wherein,
the audio/video output module is used for outputting audio/video signals needing RF transmission to the audio/video conversion control module;
the audio/video conversion control module is used for performing conversion control on the audio/video signals from the audio/video output module;
the RF audio and video signal modulation module is used for modulating the audio and video signals which are converted and controlled by the audio and video conversion control module into RF audio and video signals;
and the RF transmitting module is used for carrying out RF transmission on the RF audio and video signals modulated by the RF audio and video signal modulating module.
The audio and video conversion control module performs conversion control on the audio and video signals from the audio and video output module to: carrying out audio operational amplification and filtering on the received audio signal, modulating the audio signal into FM or AM audio, and carrying out denoising processing on the received video signal;
the RF audio and video signal modulation module modulates the audio and video signals after the conversion control into RF audio and video signals, and the RF audio and video signal modulation module is characterized in that: and modulating the audio signal and the video signal processed by the audio/video conversion control module to form an RF audio/video signal.
The terminal also comprises a user interaction module which is used for informing the audio and video output module to output corresponding audio and video according to user operation.
A method of transmitting RF audio-video signals, comprising:
the audio/video output module outputs audio/video signals needing RF transmission to the audio/video conversion control module;
the audio/video conversion control module is used for carrying out conversion control on the audio/video signals from the audio/video output module;
the RF audio and video signal modulation module modulates the audio and video signals after the conversion control into RF audio and video signals;
and the RF transmitting module is used for carrying out RF transmission on the RF audio and video signals modulated by the RF audio and video signal modulating module.
The audio and video conversion control module performs conversion control on the audio and video signals from the audio and video output module to: carrying out audio operational amplification and filtering on the received audio signal, modulating the audio signal into FM or AM audio, and carrying out denoising processing on the received video signal;
the RF audio and video signal modulation module modulates the audio and video signals after the conversion control into RF audio and video signals, and the RF audio and video signal modulation module is characterized in that: and modulating the audio signal and the video signal processed by the audio/video conversion control module to form an RF audio/video signal.
The method further comprises the following steps: and the user interaction module informs the audio and video output module to output corresponding audio and video according to the user operation.
The invention relates to a device, a terminal and a method for transmitting RF audio and video signals.A audio and video conversion control module performs conversion control on the audio and video signals from an audio and video output module, the audio and video signals after the conversion control are modulated into the RF audio and video signals by a RF audio and video signal modulation module and are transmitted by a RF transmitting module. By adopting the scheme of transmitting the RF audio and video signals, the wireless internet electronic terminal equipment can support the wireless transmission of the audio and video signals with the television indoors and realize the wireless display function, thereby expanding the application range of the wireless internet electronic terminal equipment.
Drawings
FIG. 1 is a schematic diagram of an apparatus for transmitting RF audio/video signals according to the present invention;
FIG. 2 is a schematic flow chart of a method for transmitting RF audio/video signals according to the present invention;
fig. 3 is a schematic block diagram of a wireless internet electronic terminal device for transmitting RF audio/video signals according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an audio-video conversion control & RF audio-video signal modulation module according to an embodiment of the present invention.
Detailed Description
The basic idea of the invention is: the audio and video conversion control module is used for carrying out conversion control on the audio and video signals from the audio and video output module, the audio and video signals after the conversion control are modulated into RF audio and video signals by the RF audio and video signal modulation module, and the RF audio and video signals are transmitted through the RF transmitting module.
Fig. 1 is a schematic structural diagram of an apparatus for transmitting RF audio/video signals according to the present invention, as shown in fig. 1, the apparatus includes: the device comprises an audio and video output module, an audio and video conversion control module, an RF audio and video signal modulation module and an RF transmitting module; wherein,
the audio/video output module is used for outputting audio/video signals needing RF transmission to the audio/video conversion control module;
the audio/video conversion control module is used for performing conversion control on the audio/video signals from the audio/video output module;
the RF audio and video signal modulation module is used for modulating the audio and video signals which are converted and controlled by the audio and video conversion control module into RF audio and video signals;
and the RF transmitting module is used for carrying out RF transmission on the RF audio and video signals modulated by the RF audio and video signal modulating module.
Generally, the device may further include a user interaction module, configured to notify the audio/video output module to output corresponding audio/video according to a user operation. The user interaction module may be a keyboard.
The audio/video output module is generally located on a motherboard (e.g., an electronic terminal motherboard with a wireless internet access function).
The RF transmitting module is generally a radio frequency antenna (such as an antenna for wireless internet access and an antenna for transmitting RF audio/video signals).
The audio and video conversion control module performs conversion control on the audio and video signals from the audio and video output module to: the received audio signals are subjected to audio operational amplifier and filtering, the audio signals are modulated into FM or AM audio, and the received video signals are subjected to denoising processing, and correspondingly, the RF audio/video signal modulation module modulates the audio/video signals subjected to conversion control into RF audio/video signals: and modulating the audio signal and the video signal processed by the audio/video conversion control module to form an RF audio/video signal.
The apparatus may be located on a mobile terminal.
The invention also correspondingly provides a terminal for transmitting the RF audio and video signals, which comprises a device for transmitting the RF audio and video signals, and the device for transmitting the RF audio and video signals further comprises: the device comprises an audio and video output module, an audio and video conversion control module, an RF audio and video signal modulation module and an RF transmitting module; wherein,
the audio/video output module is used for outputting audio/video signals needing RF transmission to the audio/video conversion control module;
the audio/video conversion control module is used for performing conversion control on the audio/video signals from the audio/video output module;
the RF audio and video signal modulation module is used for modulating the audio and video signals which are converted and controlled by the audio and video conversion control module into RF audio and video signals;
and the RF transmitting module is used for carrying out RF transmission on the RF audio and video signals modulated by the RF audio and video signal modulating module.
The audio and video conversion control module performs conversion control on the audio and video signals from the audio and video output module to: carrying out audio operational amplification and filtering on the received audio signal, modulating the audio signal into FM or AM audio, and carrying out denoising processing on the received video signal;
the RF audio and video signal modulation module modulates the audio and video signals after the conversion control into RF audio and video signals, and the RF audio and video signal modulation module is characterized in that: and modulating the audio signal and the video signal processed by the audio/video conversion control module to form an RF audio/video signal.
The terminal also comprises a user interaction module which is used for informing the audio and video output module to output corresponding audio and video according to user operation.
The present invention also provides a method for transmitting RF audio/video signals, fig. 2 is a schematic flow chart of the method for transmitting RF audio/video signals according to the present invention, as shown in fig. 2, the method includes:
step 201: the audio and video output module outputs the audio and video signals needing RF transmission to the audio and video conversion control module.
Step 202: the audio and video conversion control module is used for carrying out conversion control on the audio and video signals from the audio and video output module.
The audio/video conversion control module can be used for performing conversion control on the audio/video signals from the audio/video output module: the received audio signal is subjected to audio operational amplifier and filtering, the audio signal is modulated into FM or AM audio, and the received video signal is subjected to denoising processing.
Step 203: and the RF audio and video signal modulation module modulates the audio and video signals subjected to conversion control into RF audio and video signals.
Here, the RF audio/video signal modulation module modulates the audio signal and the video signal processed by the audio/video conversion control module to form an RF audio/video signal.
Step 204: and the RF transmitting module is used for carrying out RF transmission on the RF audio and video signals modulated by the RF audio and video signal modulating module.
It should be noted that the user interaction module may notify the audio/video output module to output corresponding audio/video according to the user operation.
The following describes the implementation of the technical solution in further detail with reference to specific embodiments.
Examples
Fig. 3 is a schematic block diagram of a wireless internet electronic terminal device for transmitting RF audio/video signals according to an embodiment of the present invention. As shown in fig. 3, the wireless internet electronic terminal device is composed of the following parts: the system comprises a power management module, a clock, other application function control, a wireless modulation and demodulation circuit, a Memory, a man-machine interaction interface, an audio output interface, a video output interface, an audio-video conversion control & RF audio-video signal modulation module, an RF transmitting antenna, interaction equipment and a peripheral interface control circuit, such as a USB (universal serial bus), an audio video, an SIM (subscriber identity module) card, an SD (secure Digital Memory card) card interface, other application function circuits and the like, wherein the peripheral interface control circuit, the wireless modulation and demodulation circuit, the audio output interface, the video output interface, the man-machine interaction interface and other application function control are all positioned on a central processing unit, and functions of all parts are explained below.
The central processing unit is the most core part and comprises modulation and demodulation, coding/decoding, encryption/decryption, calling and running of programs in the memory, processing of internal digital signals, control of various functional modules through a general purpose input/output (GPIO) port to realize corresponding functions, and provision of various interfaces and the outside to realize the functions of connection or communication.
The wireless modulation and demodulation circuit part is connected with a bus interface of the processor, and realizes the receiving and transmitting of wireless signals by carrying out information source, channel coding, decoding, encryption and the like, amplification, filtering and the like on the signals.
The memory is connected with the bus of the processor to realize the storage of the codes of the system operation and the data and programs of the user.
The audio/video conversion control and RF audio/video signal modulation module is connected with the audio output interface and the video output interface of the central processing unit, and can convert the audio/video signals output by the central processing unit into RF audio/video signals through software configuration and send the RF audio/video signals through the RF transmitting antenna.
The interaction device (keyboard or/and mouse, sensor, etc.) is connected with the man-machine interface of the processor for realizing man-machine interaction.
The peripheral interfaces are connected with various interfaces of the processor and are used for realizing respective functions, such as SIM card, SD card, USB and the like. The SIM card mainly performs two functions: storing data (controlling access to various data) and completing the whole process of client identity authentication and client information encryption algorithm under the security condition. The SD card is used for storing the function of multimedia information. The USB interface is used for communicating with a USB peripheral.
The other application function circuits are connected with the control pins of the processor and can be used for realizing other functions except internet surfing and short messages according to the actual design requirements. For example, FM radio function can be realized by matching with FM circuit, and recorder, BT (Bluetooth), wireless local area network (WiFi), Global Positioning System (GPS) and the like can be realized.
The power management comprises the functions of supplying power to the whole system, realizing charging management and the like. The clock is used to provide a reference frequency.
The system realizes the following processes of surfing the Internet/short messages and other functions: when receiving, the wireless signal received by the wireless receiving and transmitting circuit is demodulated, the processor processes the data, and transmits RF audio and video signals through the audio and video conversion control circuit and the radio frequency circuit, thereby realizing the display of contents such as internet surfing, short messages and the like, the playing of related audio and the like of the television.
The audio-video conversion control and RF audio-video signal modulation module can adopt an integrated chip module and can support multiple television systems. For example, NTSC, PAL, SECAM, can support UHF (460MHz 880 MHz). Fig. 4 is a schematic structural diagram of an audio-video conversion control & RF audio-video signal modulation module according to an embodiment of the present invention, as shown in fig. 4. After receiving the audio signal, the audio/video conversion control and RF audio/video signal modulation module firstly modulates the audio signal into FM or AM audio through audio operational amplifier and filtering; the audio-video conversion control and RF audio-video signal modulation module receives the video signal, after denoising processing, the audio signal and the processed audio signal enter the RF modulation module, and after the audio signal and the processed audio signal are modulated into the RF audio-video signal by the RF modulation module, the RF audio-video signal is transmitted out through the RF transmitting antenna.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (9)
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| CN2010105529314A CN102006432A (en) | 2010-11-19 | 2010-11-19 | Device, terminal and method for transmitting RF audio/video signals |
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| CN2010105529314A CN102006432A (en) | 2010-11-19 | 2010-11-19 | Device, terminal and method for transmitting RF audio/video signals |
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Application publication date: 20110406 |