[go: up one dir, main page]

WO2024109230A1 - 一种无线发射系统、方法和电视机 - Google Patents

一种无线发射系统、方法和电视机 Download PDF

Info

Publication number
WO2024109230A1
WO2024109230A1 PCT/CN2023/115546 CN2023115546W WO2024109230A1 WO 2024109230 A1 WO2024109230 A1 WO 2024109230A1 CN 2023115546 W CN2023115546 W CN 2023115546W WO 2024109230 A1 WO2024109230 A1 WO 2024109230A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
module
wireless
wireless transmission
dtv
Prior art date
Application number
PCT/CN2023/115546
Other languages
English (en)
French (fr)
Inventor
李志强
Original Assignee
深圳Tcl数字技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳Tcl数字技术有限公司 filed Critical 深圳Tcl数字技术有限公司
Publication of WO2024109230A1 publication Critical patent/WO2024109230A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present application relates to the field of mobile communication technology, and in particular to a wireless transmission system, method and television.
  • UHF wireless module refers to a combination of a transmitting module and a receiving module that uses UHF channels, i.e. radio waves with a frequency of 470MHZ to 900MHZ, for communication. Compared with 2.4GHZ/5GHZ/60GHZ wireless modules, it has the advantages of simple solution, low cost and large signal coverage. Therefore, more and more devices are using UHF wireless modules.
  • the UHF wireless module is used in the playback device: since the frequency of the UHF wireless module is between 470MHZ and 900MHZ, it is in the same frequency band as the DTV channel selected by the playback device such as a TV; therefore, the transmission signal of the UHF wireless module can easily interfere with the DTV signal, causing the playback device to fail to receive the DTV signal or to suffer from a loss of sensitivity.
  • the purpose of the present application is to provide a wireless transmission system, method and television set, which can effectively avoid the frequency interference problem between the wireless transmission module and the DTV receiving module.
  • the present application provides a wireless transmission system, including:
  • DTV receiving module wireless transmitting module
  • the wireless transmitting module is connected to the DTV receiving module
  • the DTV receiving module is used to receive DTV signals.
  • the DTV signals have several channels.
  • the corresponding frequency of the currently broadcast channel is a first frequency.
  • the transmitting frequency of the wireless transmitting module is a second frequency.
  • the first frequency is different from the second frequency.
  • the difference between the first frequency and the second frequency is not less than a safety threshold frequency value.
  • the wireless transmission system further includes:
  • the wireless receiving module is used to receive the signal sent by the wireless transmitting module.
  • the DTV receiving module includes:
  • High-frequency head used to receive DTV signals
  • the demodulation chip is connected to the tuner and is used to decode the DTV signal and output the audio and video signal.
  • the DTV receiving module further includes:
  • the main chip is connected to the tuner, the demodulation chip and the wireless transmission module respectively, and is used to identify the current broadcast channel and obtain the first frequency, and adjust the transmission frequency of the wireless transmission module to the second frequency.
  • the wireless transmission module is used to transmit signals in the UHF frequency band.
  • the wireless transmission system also includes an audio output module, which is connected to the wireless receiving module; the audio output module is used to receive the audio signal output by the wireless receiving module and play the sound according to the audio signal.
  • the wireless transmission system also includes a display module, which is connected to the wireless receiving module; the display module is used to receive the video signal output by the wireless receiving module and display image information corresponding to the video signal.
  • the embodiment of the present application also provides a television set, including a wireless transmission system, the wireless transmission system including a DTV receiving module and a wireless transmission module; the wireless transmission module is connected to the DTV receiving module; the DTV receiving module is used to receive a DTV signal, the DTV signal has a plurality of channels, and the currently playing channel
  • the corresponding frequency is the first frequency
  • the transmission frequency of the wireless transmission module is the second frequency
  • the first frequency is different from the second frequency.
  • the difference between the first frequency and the second frequency is not less than the safety threshold frequency value.
  • the wireless transmission system further includes:
  • the wireless receiving module is used to receive the signal sent by the wireless transmitting module.
  • the DTV receiving module includes:
  • High-frequency head used to receive DTV signals
  • the demodulation chip is connected to the tuner and is used to decode the DTV signal and output the audio and video signal.
  • the DTV receiving module further includes:
  • the main chip is connected to the tuner, the demodulation chip and the wireless transmission module respectively, and is used to identify the current broadcast channel and obtain the first frequency, and adjust the transmission frequency of the wireless transmission module to the second frequency.
  • the wireless transmission module is used to transmit signals in the UHF frequency band.
  • the wireless transmission system further includes an audio output module, which is connected to the wireless receiving module; the audio output module is used to receive the audio signal output by the wireless receiving module and play the sound according to the audio signal.
  • the present application also provides a wireless transmission method, the wireless signal transmission method comprising the following steps:
  • the transmission frequency of the wireless transmission module is adjusted to a second frequency to send a wireless signal; wherein the second frequency is different from the first frequency.
  • the frequency band of the wireless signal includes the UHF band.
  • the step of adjusting the transmission frequency to the second frequency according to the first frequency specifically includes:
  • the transmission frequency is identified, and when the transmission frequency is not within the target frequency range, the transmission frequency is adjusted to a second frequency within the target frequency range.
  • the wireless transmission method further includes the following steps before the step of receiving a DTV signal and identifying a current broadcast channel and obtaining a frequency corresponding to the current broadcast channel as a first frequency:
  • the difference between the first frequency and the second frequency is a preset value, and the preset value is not less than a safety threshold frequency value.
  • the present application provides a wireless transmission system, method and television, wherein the transmission frequency of the wireless transmission module in the wireless transmission system is different from the frequency of the DTV receiving module, thereby effectively avoiding the frequency interference problem between the wireless transmission module and the DTV receiving module and ensuring the effective reception of the DTV signal.
  • FIG1 is a first structural block diagram of a wireless transmission system provided in the present application.
  • FIG2 is a second structural block diagram of the wireless transmission system provided in the present application.
  • FIG3 is a third structural block diagram of the wireless transmission system provided in the present application.
  • FIG4 is a fourth structural block diagram of the wireless transmission system provided in the present application.
  • FIG5 is a fifth structural block diagram of the wireless transmission system provided in the present application.
  • FIG6 is a flowchart of the wireless transmission system provided in the present application.
  • FIG. 7 is a flow chart of an embodiment of a wireless transmission method provided by the present application.
  • FIG8 is a flow chart of another embodiment of the wireless transmission method provided by the present application.
  • the purpose of the present application is to provide a wireless transmission system, method and television set, which can effectively avoid the frequency interference problem between the wireless transmission module and the DTV receiving module.
  • the wireless transmission system includes a DTV receiving module 11 and a wireless transmission module 12.
  • the wireless transmission module 12 is connected to the DTV receiving module 11, and the DTV receiving module 11 is used to receive DTV signals.
  • the DTV signal has several channels, and the corresponding frequency of the currently broadcast channel is the first frequency.
  • the transmission frequency of the wireless transmission module 12 is the second frequency, and the first frequency is different from the second frequency, that is, the frequencies of the DTV receiving module 11 and the wireless transmission module 12 are not the same, thereby avoiding frequency interference between the wireless transmission module 12 and the DTV receiving module 11, and ensuring that the DTV receiving module 11 can effectively receive the DTV signal.
  • the wireless transmission module 12 is used to transmit a signal in the UHF band, and the DTV signal of the DTV receiving module 11 is in the same frequency band as the UHF band.
  • the transmission frequency of the wireless transmission module 12 is a second frequency, which is different from the first frequency of the currently broadcast channel of the DTV signal.
  • the DTV receiving module 11 identifies the first frequency of the currently broadcast channel of the DTV signal and obtains the first frequency, and outputs the first frequency to the wireless transmitting module 12.
  • the wireless transmitting module 12 determines whether the current frequency is the same as the first frequency based on the first frequency. If the first frequency is the same as the current frequency, the current frequency is adjusted to the second frequency, thereby staggering the first frequency of the currently broadcast channel to avoid the same-frequency interference problem between the wireless transmitting module 12 and the DTV receiving module 11.
  • the wireless transmission module 12 adjusts the current frequency to the second frequency; at this time, the first frequency and the second frequency
  • the difference between the two frequencies is not less than the safety threshold frequency value.
  • the safety threshold frequency value refers to the minimum frequency difference between the two signals without frequency interference. That is, when the current frequency of the wireless transmitting module 12 does not differ from the first frequency by the safety threshold frequency value, it will also interfere with the reception of the DTV signal by the DTV receiving module 11. Therefore, the first frequency and the second frequency are staggered by at least one safety threshold frequency value, which can avoid the problem of close frequency interference between the wireless transmitting module 12 and the DTV receiving module 11.
  • the DTV receiving module 11 includes a tuner 111 and a demodulation chip 112, and the demodulation chip 112 is connected to the tuner 111.
  • the tuner 111 is used to receive DTV signals, and can realize frequency selection, amplification and frequency reduction functions of the DTV signals, and output intermediate frequency signals to the demodulation chip 112 after frequency reduction of the received DTV signals, and the demodulation chip 112 decodes the DTV signals and outputs audio and video signals.
  • the DTV receiving module 11 also includes a main chip 113, which is connected to the tuner 111 and the demodulation chip 112 respectively.
  • the demodulation chip 112 After the demodulation chip 112 performs channel demodulation and channel decoding on the DTV signal, it outputs a transmission stream to the main chip 113, and the main chip 113 multiplexes and decodes the transmission stream and outputs an audio and video signal.
  • the main chip 113 is also used to switch the current broadcast channel of the DTV signal, and obtain the corresponding frequency of the current broadcast channel of the DTV signal received by the tuner 111 in real time, so as to provide a reference basis for the subsequent frequency adjustment of the wireless receiving module 13.
  • the DTV receiving module 11 is connected to the wireless receiving module 13 through the main chip 113, and the main chip 113 outputs the acquired first frequency to the wireless receiving module 13, and outputs the audio and video signal to the wireless transmitting module 12.
  • the signal transmission between the main chip 113 and the wireless receiving module 13 can be realized through the I2C bus, and can also be realized through the USB path, which is not specifically limited in this application.
  • the wireless receiving module 13 when the wireless receiving module 13 receives the first frequency output by the main chip 113, it compares the first frequency with the current frequency. When the first frequency is the same as or close to the current frequency, the current frequency is adjusted to the second frequency. Specifically, since the wireless transmitting module 12 is used to transmit a signal in the UHF band, that is, the current frequency itself is in the UHF band. The transmitting frequency of the wireless transmitting module 12 is staggered from the first frequency, and the wireless transmitting module 12 calculates a safe frequency range based on the first frequency, and the safe frequency range includes a first interval and a second interval.
  • the upper limit value of the first interval is the difference between the first frequency and the safety threshold frequency value
  • the lower limit value of the first interval is the lower limit value of the UHF frequency band
  • the lower limit value of the second interval is the sum of the first frequency and the safety threshold frequency value
  • the upper interval of the second frequency is the upper limit value of the UHF frequency band.
  • the safety threshold frequency value is A
  • the first frequency is B
  • the first interval is 470MHZ ⁇ (B-A)
  • the second interval is (B+A) ⁇ 900MHZ
  • the safety threshold frequency value A can be 40MHZ
  • the second frequency is within the first interval or the second interval, thereby ensuring that the second frequency differs from the first frequency by at least the safety threshold frequency value, thereby avoiding co-frequency or near-frequency interference between the wireless transmitting module 12 and the DTV receiving module 11.
  • the wireless transmission system further includes a wireless receiving module 13, the wireless receiving module 13 is connected to the wireless transmitting module 12 in communication, and the wireless receiving module 13 is used to receive the signal sent by the wireless transmitting module 12.
  • the wireless transmitting module 12 adjusts the transmission frequency according to the first frequency, it matches the frequency with the wireless receiving module 13, and after the frequency matching is successful, it transmits the signal at the second frequency.
  • the wireless transmitting module 12 modulates the audio signal or the video signal in the received audio and video signal onto the radio frequency carrier, and then sends it through the wireless signal of the second frequency, and the wireless receiving module 13 receives the wireless signal.
  • the wireless transmission system further includes an audio output module 14, and the audio output module 14 is connected to the wireless receiving module 13.
  • the wireless transmission module 12 modulates the audio signal and sends it to the wireless receiving module 13
  • the wireless receiving module 13 demodulates and decodes the received signal to restore the audio signal, and sends the audio signal to the audio output module 14, and the audio output module 14 plays the sound.
  • the wireless transmitting module 12 further includes a display module 15, and the display module 15 is connected to the wireless receiving module 13. After completion, it is sent to the wireless receiving module 13, which demodulates and decodes the received signal to restore the video signal, and sends the video signal to the display module 15, which displays the image information corresponding to the video signal.
  • the working process of the wireless transmission system includes the following steps:
  • the wireless transmitting module and the wireless receiving module perform frequency matching and operate at the second frequency
  • step 70 Determine whether the DTV signal switches channels. If so, return to step 20; if not, return to step 10.
  • the wireless transmission system in the present application will detect whether the DTV signal is currently being played. If the DTV signal is currently being played, it will identify the current playing channel of the DTV signal and obtain the frequency of the current playing channel as the first frequency. Then the first frequency is sent to the wireless transmission module, and the wireless transmission module calculates the safe frequency range according to the first frequency, and determines whether the current frequency is within the safe frequency range. If the current frequency is not within the safe frequency range, the current frequency is adjusted to the second frequency. After that, the wireless transmission module and the wireless receiving module are frequency matched, and after the frequency matching is completed, the signal will be sent and received at the second frequency. The DTV receiving module then determines whether the DTV signal switches channels.
  • the channel If the channel is not switched, it will continue to determine whether the currently playing signal is a DTV signal; if the DTV signal switches channels, it will continue to identify the currently playing channel and obtain the first frequency, so that the subsequent wireless transmission module's transmission frequency can be staggered with the first frequency, thereby avoiding the wireless transmission module from generating co-frequency or close-frequency interference with the reception of the DTV signal.
  • the wireless transmission system in this application can automatically identify the current broadcast channel of the DTV signal.
  • the transmission frequency of the wireless transmission module is dynamically adjusted according to the first frequency of the currently broadcast channel, so that the second frequency of the wireless transmission module is different from the first frequency, ensuring that the wireless transmission module and the DTV receiving module operate at different frequencies, avoiding the problem of close frequency or same frequency interference between the DTV receiving module and the wireless transmission module, thereby effectively improving the reliability of DTV signal reception.
  • the present application also provides a television set, which includes the above-mentioned wireless transmission system, that is, the television set includes a DTV receiving module and a wireless transmission module, wherein the wireless transmission module is used to transmit signals in the UHF frequency band, or it can be said that the television set includes a UHF wireless transmission module.
  • the television set can use wireless modules of other frequency bands, such as 2.4GHZ, 5.8GHZ or 60GHZ, but compared with wireless modules of other frequency bands, UHF wireless transmission modules are cheaper in cost, thereby reducing the cost of the television set.
  • the wireless transmission system in the present application can dynamically adjust the transmission frequency of the wireless transmission module according to the frequency information when identifying the frequency information of the current broadcast channel of the DTV signal, so that the transmission frequency of the wireless transmission module can be far away from the corresponding frequency of the current broadcast channel of the DTV signal, avoiding the problem of co-frequency or close-frequency interference, thereby solving the problem of interference of the UHF wireless transmission module with the DTV receiving module, and enabling the TV to apply a UHF wireless transmission module with lower cost and better performance. Since the wireless transmission system is described in detail above, it will not be repeated here.
  • the wireless transmission method comprises the following steps:
  • the frequency band corresponding to the wireless signal may be a UHF frequency band, and the DTV signal of the DTV receiving module is in the same frequency band as the UHF frequency band.
  • the current broadcast channel of the DTV signal is identified, and the corresponding frequency of the current broadcast channel, i.e., the first frequency, is obtained.
  • the transmitting frequency is adjusted to a second frequency different from the first frequency according to the first frequency, thereby avoiding frequency interference between the received DTV signal and the transmitted wireless signal, and ensuring that the received DTV signal is received correctly. Ensure that the reception of DTV signals is no longer interfered with.
  • step 200 specifically includes:
  • the target frequency range is the safe frequency range.
  • the current transmission frequency is adjusted to the target frequency range to obtain the second frequency.
  • the target frequency range includes a first interval and a second interval.
  • the upper limit value of the first interval is the difference between the first frequency and the safety threshold frequency value
  • the lower limit value of the first interval is the lower limit value of the UHF frequency band
  • the lower limit value of the second interval is the sum of the first frequency and the safety threshold frequency value
  • the upper interval of the second frequency is the upper limit value of the UHF frequency band.
  • step 100 also includes:
  • the wireless transmission method in the present application can be applied to a television, which can be a digital television.
  • the television decodes the DTV signal and outputs the audio and video signal while identifying the corresponding frequency of the current broadcast channel of the DTV signal.
  • the safe frequency range is calculated based on the first frequency of the current broadcast channel.
  • the current transmission frequency is adjusted to the second frequency.
  • the audio and video signal is then modulated and sent as a wireless signal of the second frequency, thereby completing the subsequent playback and display of the audio and video signal.
  • the present application provides a wireless transmission system, method and television, wherein the wireless transmission system includes a DTV receiving module and a wireless transmission module; the wireless transmission module is connected to the DTV receiving module; the DTV receiving module is used to receive a DTV signal, the DTV signal has a plurality of channels, the corresponding frequency of the currently broadcast channel is a first frequency, the transmission frequency of the wireless transmission module is a second frequency, and the first frequency is different from the second frequency; the wireless transmission module and the DTV receiving module in the present application are different in frequency.
  • the frequency operation can effectively avoid the frequency interference problem between the wireless transmitting module and the DTV receiving module.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

本申请公开了一种无线发射系统、方法和电视机，其中，无线发射系统包括DTV接收模块，无线发射模块；无线发射模块与所述DTV接收模块连接；DTV接收模块用于接收DTV信号，DTV信号具有若干频道，当前所播放频道的对应频率为第一频率，无线发射模块的发射频率为第二频率，第一频率与第二频率不同。

Description

一种无线发射系统、方法和电视机
本申请要求于2022年11月25日提交中国专利局、申请号为202211494483.6、申请名称为“一种无线发射系统、方法和电视机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及移动通信技术领域，特别涉及一种无线发射系统、方法和电视机。
背景技术
UHF无线模块是指使用UHF频道即频率为470MHZ～900MHZ的无线电波进行通讯的发送模块和接收模块组合，它相对2.4GHZ/5GHZ/60GHZ的无线模块具有方案简单、成本低、信号覆盖范围大的优点。因此，目前使用UHF无线模块的设备越来越多。
技术问题
但是，如果将UHF无线模块应用在播放装置上存在一个很大的缺点：由于UHF无线模块的频率在470MHZ～900MHZ，刚好和播放装置如电视选择的DTV频道在同一个频段；因此，UHF无线模块的发射信号很容易干扰到DTV信号，导致播放装置接收不到DTV信号或灵敏度受损。
因而现有技术还有待改进和提高。
技术解决方案
本申请的目的在于提供一种无线发射系统、方法和电视机，能够有效避免无线发射模块与DTV接收模块之间的频率干扰问题。
为了达到上述目的，本申请采取了以下技术方案：
本申请实施例提供一种无线发射系统，包括：
DTV接收模块，无线发射模块；
无线发射模块与DTV接收模块连接；
DTV接收模块用于接收DTV信号，DTV信号具有若干频道，当前所播放频道的对应频率为第一频率，无线发射模块的发射频率为第二频率，第一频率与第二频率不同。
在一些实施例中的无线发射系统，第一频率与第二频率的差值不小于安全门限频率值。
在一些实施例中的无线发射系统，无线发射系统还包括：
无线接收模块，用于接收无线发射模块发出的信号。
在一些实施例中的无线发射系统，DTV接收模块包括：
高频头，用于接收DTV信号；
解调芯片，与高频头连接，用于将DTV信号进行解码后输出音视频信号。
在一些实施例中的无线发射系统，DTV接收模块还包括：
主芯片，分别与高频头、解调芯片和无线发射模块连接，用于识别当前所播放频道并获取第一频率，并将无线发射模块的发射频率调整为第二频率。
在一些实施例中的无线发射系统，无线发射模块用于发射UHF频段的信号。
在一些实施例中的无线发射系统，无线发射系统还包括音频输出模块，音频输出模块与无线接收模块连接；音频输出模块用于接收无线接收模块输出的音频信号，并根据音频信号进行声音播放。
在一些实施例中的无线发射系统，无线发射系统还包括显示模块，显示模块与无线接收模块连接；显示模块用于接收无线接收模块输出的视频信号，并显示视频信号对应的图像信息。
本申请实施例还提供了一种电视机，包括无线发射系统，无线发射系统包括DTV接收模块和无线发射模块；无线发射模块与DTV接收模块连接；DTV接收模块用于接收DTV信号，DTV信号具有若干频道，当前所播放频道 的对应频率为第一频率，无线发射模块的发射频率为第二频率，第一频率与第二频率不同。
在一些实施例中的电视机，第一频率与第二频率的差值不小于安全门限频率值。
在一些实施例中的电视机，无线发射系统还包括：
无线接收模块，用于接收无线发射模块发出的信号。
在一些实施例中的电视机，DTV接收模块包括：
高频头，用于接收DTV信号；
解调芯片，与高频头连接，用于将DTV信号进行解码后输出音视频信号。
在一些实施例中的电视机，DTV接收模块还包括：
主芯片，分别与高频头、解调芯片和无线发射模块连接，用于识别当前所播放频道并获取第一频率，并将无线发射模块的发射频率调整为第二频率。
在一些实施例中的电视机，无线发射模块用于发射UHF频段的信号。
在一些实施例中的电视机，无线发射系统还包括音频输出模块，音频输出模块与无线接收模块连接；音频输出模块用于接收无线接收模块输出的音频信号，并根据音频信号进行声音播放。
本申请实施例还提供了一种无线发射方法，无线信号发射方法包括如下步骤：
接收DTV信号并识别当前播放频道，获取与当前播放频道对应的频率作为第一频率；
将无线发射模块的发射频率调整为第二频率以发送无线信号；其中，第二频率与第一频率不同。
在一些实施例中的无线发射方法，无线信号的频段包括UHF频段。
在一些实施例中的无线发射方法，根据第一频率将发射频率调整为第二频率的步骤具体包括：
根据第一频率获取目标频率范围；
识别发射频率，且当发射频率不在目标频率范围内时，则将发射频率调整至位于目标频率范围内的第二频率。
在一些实施例中的无线发射方法，接收DTV信号并识别当前播放频道，获取与当前播放频道对应的频率作为第一频率的步骤之前还包括：
将DTV信号进行解码后输出音视频信号。
在一些实施例中的无线发射方法，第一频率和第二频率的差值为预设值，预设值不小于安全门限频率值。
有益效果
本申请提供了一种无线发射系统、方法和电视机，其中，无线发射系统中无线发射模块的发射频率与DTV接收模块的频率不相同，从而有效避免了无线发射模块与DTV接收模块之间的频率干扰问题，确保DTV信号的有效接收。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请提供的无线发射系统的第一种结构框图。
图2为本申请提供的无线发射系统的第二种结构框图。
图3为本申请提供的无线发射系统的第三种结构框图。
图4为本申请提供的无线发射系统的第四种结构框图。
图5为本申请提供的无线发射系统的第五种结构框图。
图6为本申请提供的无线发射系统的工作流程图。
图7为本申请提供的无线发射方法的一实施例的流程图。
图8为本申请提供的无线发射方法的另一实施例的流程图。
具体实施方式
本申请的目的在于提供一种无线发射系统、方法和电视机，能够有效避免无线发射模块与DTV接收模块之间的频率干扰问题。
为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
请参阅图1，本申请提供的无线发射系统包括DTV接收模块11和无线发射模块12；无线发射模块12与DTV接收模块11连接，DTV接收模块11用于接收DTV信号。其中，DTV信号具有若干频道，当前所播放频道的对应频率为第一频率；无线发射模块12的发射频率为第二频率，第一频率与第二频率不同，即DTV接收模块11与无线发射模块12的频率并不相同，由此可避免无线发射模块12和DTV接收模块11之间的频率发生干扰，确保DTV接收模块11能够有效接收DTV信号。
在一些实施例中，无线发射模块12用于发射UHF频段的信号，而DTV接收模块11的DTV信号与UHF频段为同一个频段，为了避免无线发射模块12的发射频率对DTV接收模块11的DTV信号的干扰，无线发射模块12的发射频率为第二频率，第二频率与DTV信号的当前所播放频道的第一频率并不相同。
具体实施时，由DTV接收模块11识别DTV信号的当前所播放频道的第一频率并获取第一频率，将该第一频率输出至无线发射模块12，由无线发射模块12根据第一频率判断当前频率与第一频率是否相同，若第一频率与当前频率相同时，则将当前频率调整至第二频率，进而与当前所播放频道的第一频率错开，避免无线发射模块12与DTV接收模块11之间的同频干扰问题。
作为一种实施例，当无线发射模块12的当前频率与第一频率相近时，无线发射模块12将当前频率调整至第二频率；此时，第一频率与第二频率 之间的差值不小于安全门限频率值。需要说明的是，安全门限频率值是指两个信号之间不会发生频率干扰的最小频率差。即当无线发射模块12的当前频率与第一频率之间未相差安全门限频率值时，同样会干扰DTV接收模块11对DTV信号的接收，由此将第一频率和第二频率错开至少一安全门限频率值，可避免无线发射模块12与DTV接收模块11之间发生近频干扰的问题。
在一些实施例中，请参阅图2，DTV接收模块11包括高频头111和解调芯片112，解调芯片112与高频头111连接。其中，高频头111用于接收DTV信号，可实现对DTV信号的选频、放大和降频功能，将接收到的DTV信号降频后输出中频信号至解调芯片112，由解调芯片112将DTV信号进行解码后输出音视频信号。
作为一种实施例，DTV接收模块11还包括主芯片113，主芯片113分别与高频头111和解调芯片112连接。当解调芯片112对DTV信号进行信道解调和信道解码之后输出传输流至主芯片113，由主芯片113将传输流进行复用和解码之后输出音视频信号。其中，主芯片113还用于切换DTV信号的当前所播放的频道，并实时获取高频头111接收的DTV信号的当前所播放频道的对应频率，以便于为后续无线接收模块13的频率调整提供参考依据。
作为一种实施例，DTV接收模块11中通过主芯片113与无线接收模块13连接，由主芯片113将获取的第一频率输出至无线接收模块13，并将音视频信号输出至无线发射模块12。其中，主芯片113与无线接收模块13之间的信号传输可通过I2C总线实现，也可通过USB通路实现，本申请对此不做具体限定。
在一些实施例中，无线接收模块13接收到主芯片113输出的第一频率时，会将第一频率与当前频率进行对比，当第一频率与当前频率相同或相近时，则将当前频率调整至第二频率。具体地，由于无线发射模块12是用于发射UHF频段的信号，即当前频率本身在UHF频段内。为了使得无线发 射模块12的发射频率与第一频率错开，无线发射模块12根据第一频率计算出安全频率范围，该安全频率范围包括第一区间和第二区间。其中，第一区间的上限值为第一频率与安全门限频率值的差值，第一区间的下限值为UHF频段的下限值；第二区间的下限值为第一频率与安全门限频率值的和值，第二频率的上区间为UHF频段的上限值。无线发射模块12根据第一频率计算出安全频率范围之后，会选择将当前频率调整至第一区间或第二区间，具体选择时，可以以当前频率与哪一个区间更接近为依据进行调整，本申请对此不作限定。
例如，若UFH频段为470MHZ～900MHZ，安全门限频率值为A，第一频率为B，那么第一区间为470MHZ～(B-A)，第二区间为(B+A)～900MHZ，其中，安全门限频率值A可以是40MHZ，第二频率则在第一区间或第二区间内，由此确保第二频率与第一频率之间相差至少安全门限频率值，进而避免无线发射模块12和DTV接收模块11之间发生同频或近频干扰。
在一些实施例中，请参阅图3，无线发射系统还包括无线接收模块13，无线接收模块13与无线发射模块12通信连接，无线接收模块13用于接收无线发射模块12发出的信号。无线发射模块12根据第一频率调整发射频率之后，与无线接收模块13进行对频，对频成功之后，以第二频率发射信号。具体地，无线发射模块12将接收的音视频信号中的音频信号或者视频信号调制到射频载波上，然后通过第二频率的无线信号发送，由无线接收模块13接收该无线信号。
作为一种实施例，请参阅图4，无线发射系统还包括音频输出模块14，音频输出模块14与无线接收模块13连接。当无线发射模块12将音频信号调制完成后发送至无线接收模块13，无线接收模块13将接收的信号进行解调和解码以还原音频信号，并将音频信号发送至音频输出模块14，由音频输出模块14进行声音的播放。
作为另一种实施例，请参阅图5，无线发射模块12还包括显示模块15，显示模块15与无线接收模块13连接。当无线发射模块12将视频信号调制 完成后发送至无线接收模块13，由无线接收模块13将接收的信号进行解调和解码以还原视频信号，并将视频信号发送至显示模块15，由显示模块15显示该视频信号对应的图像信息。
为了进一步说明该无线发射系统的工作过程，以下举具体实施例对该无线发射系统的工作过程进行详细说明，请参阅图6，无线发射系统的工作过程包括如下步骤：
10、检测是否播放DTV信号，若是，则执行20；若否，则继续检测；
20、识别DTV信号的当前所播放频道并获取第一频率；
30、获取安全频率范围；
40、判断当前频率是否在安全频率范围内，若否，则执行50；若是，则执行步骤70；
50、调整当前频率至第二频率；
60、无线发射模块与无线接收模块进行对频，并以第二频率工作；
70、判断是否DTV信号是否切换频道，若是，则返回步骤20；若否，则返回步骤10。
本申请中的无线发射系统在进入工作状态之后，会检测当前是否在播放DTV信号，如果当前在播放DTV信号时，会识别该DTV信号的当前所播放频道，并获取当前播放频道的频率作为第一频率。之后将该第一频率发送至无线发射模块，无线发射模块根据第一频率计算安全频率范围，并判断当前频率是否在安全频率范围内，若当前频率未在安全频率范围内，则将当前频率调整至第二频率。之后无线发射模块与无线接收模块进行对频，对频完成后将以第二频率进行收发信号。再由DTV接收模块判断DTV信号是否切换频道，在没有切换频道时，则会继续判断当前播放的是否是DTV信号；若DTV信号切换了频道，则会继续识别当前所播放的频道并获取第一频率，以便于后续无线发射模块的发射频率能够与第一频率错开，进而避免无线发射模块对DTV信号的接收产生同频或近频干扰。
本申请中的无线发射系统能够自动识别DTV信号的当前所播放频道， 根据当前所播放频道的第一频率实现对无线发射模块的发射频率进行动态调整，使得无线发射模块的第二频率与第一频率不相同，确保无线发射模块和DTV接收模块以不同的频率工作，避免DTV接收模块和无线发射模块之间的近频或同频干扰问题，从而有效提高DTV信号接收的可靠性。
本申请还提供了一种电视机，该电视机包括上述的无线发射系统，即该电视机包括DTV接收模块和无线发射模块，其中，该无线发射模块用于发射UHF频段的信号，也可以说该电视机包括UHF无线发射模块。当然有些电视机可以采用其他频段的无线模块，例如2.4GHZ、5.8GHZ或60GHZ等频率，但是相比于其他频段的无线模块而言，UHF无线发射模块在成本上会更便宜，由此可以降低电视机的成本。
并且，本申请中的无线发发射系统在识别DTV信号的当前所播放频道的频率信息，根据该频率信息可动态调整无线发射模块的发射频率，使得无线发射模块的发射频率能够远离DTV信号的当前所播放频道的对应频率，避免产生同频或近频干扰问题，从而解决了UHF无线发射模块对DTV接收模块的干扰问题，使得电视机能够应用成本更低且性能更好的UHF无线发射模块。由于上文对该无线发射系统进行了详细描述，在此不再赘述。
本申请还提供了一种无线发射方法，请参阅图7，该无线发射方法包括如下步骤：
100、接收DTV信号并识别当前播放频道，获取当前播放频道对应的频率作为第一频率；
200、将无线发射模块的发射频率调整为第二频率以发送无线信号；其中，第二频率与第一频率不同。
其中，无线信号对应的频段可以是UHF频段，而DTV接收模块的DTV信号与UHF频段为同一个频段，为了DTV信号的接收收到无线信号的干扰，因此通过识别DTV信号的当前播放频道，并获取当前播放频道的对应频率即第一频率，在根据第一频率将发射频率调整为与第一频率不相同的第二频率，由此可避免接收DTV信号与发射的无线信号之间产生频率干扰，确 保DTV信号的接收不再受到干扰。
在一些实施例中，请参阅图8，步骤200具体包括：
210、根据第一频率获取目标频率范围；
220、识别发射频率，且当发射频率不在目标频率范围内时，则将发射频率调整至位于目标频率范围内的第二频率。
其中，目标频率范围即安全频率范围，当识别到当前的发射频率不在目标频率范围内时，则将当前的发射频率调整至目标频率范围内得到第二频率。其中，目标频率范围包括第一区间和第二区间。第一区间的上限值为第一频率与安全门限频率值的差值，第一区间的下限值为UHF频段的下限值；第二区间的下限值为第一频率与安全门限频率值的和值，第二频率的上区间为UHF频段的上限值。无线发射模块根据第一频率计算出安全频率范围之后，会选择将当前频率调整至第一区间或第二区间，进而确保第一频率和第二频率的差值不小于安全门限频率值。
进一步地，步骤100还包括：
10、将DTV信号进行解码后输出音视频信号。
需要说明的是，本申请中的无线发射方法可以应用于电视机中，该电视机可以是数字电视。电视机接收DTV信号后，在识别DTV信号的当前所播放频道的对应频率的同时，将该DTV信号进行解码后输出音视频信号。之后，根据当前所播放频道的第一频率计算安全频率范围，当当前的发射频率不在安全频率范围内时，则将当前的发射频率调整至第二频率。再将音视频信号进行调制后以第二频率的无线信号进行发送，由此完成后续音视频信号的播放显示。
综上，本申请提供一种无线发射系统、方法和电视机，其中，无线发射系统包括DTV接收模块，无线发射模块；无线发射模块与DTV接收模块连接；DTV接收模块用于接收DTV信号，DTV信号具有若干频道，当前所播放频道的对应频率为第一频率，无线发射模块的发射频率为第二频率，第一频率与第二频率不同；本申请中的无线发射模块和DTV接收模块以不同 的频率工作，能够有效避免无线发射模块与DTV接收模块之间的频率干扰问题。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其申请构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (20)

  1. 一种无线发射系统，其中，包括：
    DTV接收模块，无线发射模块；
    无线发射模块与所述DTV接收模块连接；
    DTV接收模块用于接收DTV信号，DTV信号具有若干频道，当前所播放频道的对应频率为第一频率，无线发射模块的发射频率为第二频率，第一频率与第二频率不同。
  2. 根据权利要求1所述的无线发射系统，其中，所述第一频率与第二频率的差值不小于安全门限频率值。
  3. 根据权利要求1或2所述的无线发射系统，其中，所述无线发射系统还包括：
    无线接收模块，用于接收无线发射模块发出的信号。
  4. 根据权利要求1或2所述的无线发射系统，其中，所述DTV接收模块包括：
    高频头，用于接收所述DTV信号；
    解调芯片，与所述高频头连接，用于将所述DTV信号进行解码后输出音视频信号。
  5. 根据权利要求4所述的无线发射系统，其中，所述DTV接收模块还包括：
    主芯片，分别与所述高频头、所述解调芯片和所述无线发射模块连接，用于识别当前所播放频道并获取所述第一频率，并将无线发射模块的发射频率调整为第二频率。
  6. 根据权利要求5所述的无线发射系统，其中，所述无线发射模块用于发射UHF频段的信号。
  7. 根据权利要求3所述的无线发射系统，其中，所述无线发射系统还包括音频输出模块，所述音频输出模块与所述无线接收模块连接；所述音频输出模块用于接收所述无线接收模块输出的音频信号，并根据所述音频 信号进行声音播放。
  8. 根据权利要求3所述的无线发射系统，其中，所述无线发射系统还包括显示模块，所述显示模块与所述无线接收模块连接；所述显示模块用于接收所述无线接收模块输出的视频信号，并显示所述视频信号对应的图像信息。
  9. 一种电视机，其中，包括无线发射系统；所述无线发射系统包括DTV接收模块和无线发射模块；所述无线发射模块与所述DTV接收模块连接；所述DTV接收模块用于接收DTV信号，DTV信号具有若干频道，当前所播放频道的对应频率为第一频率，无线发射模块的发射频率为第二频率，第一频率与第二频率不同。
  10. 根据权利要求9所述的电视机，其中，所述第一频率与第二频率的差值不小于安全门限频率值。
  11. 根据权利要求9或10所述的电视机，其中，所述无线发射系统还包括：
    无线接收模块，用于接收无线发射模块发出的信号。
  12. 根据权利要求9或10所述的电视机，其中，所述DTV接收模块包括：
    高频头，用于接收所述DTV信号；
    解调芯片，与所述高频头连接，用于将所述DTV信号进行解码后输出音视频信号。
  13. 根据权利要求12所述的电视机，其中，所述DTV接收模块还包括：
    主芯片，分别与所述高频头、所述解调芯片和所述无线发射模块连接，用于识别当前所播放频道并获取所述第一频率，并将无线发射模块的发射频率调整为第二频率。
  14. 根据权利要求13所述的电视机，其中，所述无线发射模块用于发射UHF频段的信号。
  15. 根据权利要求11所述的电视机，其中，所述无线发射系统还包括 音频输出模块，所述音频输出模块与所述无线接收模块连接；所述音频输出模块用于接收所述无线接收模块输出的音频信号，并根据所述音频信号进行声音播放。
  16. 一种无线发射方法，其中，所述无线信号发射方法包括如下步骤：
    接收DTV信号并识别当前播放频道，获取与所述当前播放频道对应的频率作为第一频率；
    将无线发射模块的发射频率调整为第二频率以发送无线信号；其中，所述第二频率与所述第一频率不同。
  17. 根据权利要求16所述的无线发射方法，其中，所述无线信号的频段包括UHF频段。
  18. 根据权利要求16所述的无线发射方法，其中，所述根据所述第一频率将发射频率调整为第二频率的步骤具体包括：
    根据所述第一频率获取目标频率范围；
    识别所述发射频率，且当所述发射频率不在所述目标频率范围内时，则将所述发射频率调整至位于所述目标频率范围内的所述第二频率。
  19. 根据权利要求16所述的无线发射方法，其中，所述接收DTV信号并识别当前播放频道，获取与所述当前播放频道对应的频率作为第一频率的步骤之前还包括：
    将所述DTV信号进行解码后输出音视频信号。
  20. 根据权利要求16所述的无线发射方法，其中，所述第一频率和所述第二频率的差值不小于安全门限频率值。
PCT/CN2023/115546 2022-11-25 2023-08-29 一种无线发射系统、方法和电视机 WO2024109230A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211494483.6 2022-11-25
CN202211494483.6A CN117134782A (zh) 2022-11-25 2022-11-25 一种无线发射系统、方法和电视机

Publications (1)

Publication Number Publication Date
WO2024109230A1 true WO2024109230A1 (zh) 2024-05-30

Family

ID=88849647

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/115546 WO2024109230A1 (zh) 2022-11-25 2023-08-29 一种无线发射系统、方法和电视机

Country Status (2)

Country Link
CN (1) CN117134782A (zh)
WO (1) WO2024109230A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006074271A (ja) * 2004-08-31 2006-03-16 Sanyo Electric Co Ltd 地上波デジタルｔｖ放送の無線再配信システム
US20060190972A1 (en) * 2004-08-31 2006-08-24 Hideki Kasamatsu Wireless redistribution system for terrestrial digital television broadcasting
US20070079339A1 (en) * 2005-10-05 2007-04-05 Casio Computer Co., Ltd. Wireless television system
CN1968397A (zh) * 2005-11-17 2007-05-23 陈意辉 Muds/mlds/mmds/mcds/mxds/mkds－thmab/s/s2多路邻频无线数字电视系统
CN103026748A (zh) * 2010-03-31 2013-04-03 索尼公司 方法、音频/视频设备以及通信装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006074271A (ja) * 2004-08-31 2006-03-16 Sanyo Electric Co Ltd 地上波デジタルｔｖ放送の無線再配信システム
US20060190972A1 (en) * 2004-08-31 2006-08-24 Hideki Kasamatsu Wireless redistribution system for terrestrial digital television broadcasting
US20070079339A1 (en) * 2005-10-05 2007-04-05 Casio Computer Co., Ltd. Wireless television system
CN1968397A (zh) * 2005-11-17 2007-05-23 陈意辉 Muds/mlds/mmds/mcds/mxds/mkds－thmab/s/s2多路邻频无线数字电视系统
CN103026748A (zh) * 2010-03-31 2013-04-03 索尼公司 方法、音频/视频设备以及通信装置

Also Published As

Publication number Publication date
CN117134782A (zh) 2023-11-28

Similar Documents

Publication Publication Date Title
US8781525B2 (en) Electronic apparatus, reception control method and recording medium
US8665143B2 (en) System and apparatus for cascading and redistributing HDTV signals
JP5021114B2 (ja) 無線中継システム及び方法
US9026049B2 (en) Apparatus and method for playing music
KR20090125976A (ko) 송신장치, 수신장치, 이를 결합한 전송시스템 및 그 방법
KR100790368B1 (ko) 인체통신을 위한 ｄｍｂ수신용 휴대 장치 및 그 방법과,인체통신을 이용한 ｄｍｂ수신용 ｈｍｄ 장치 및 그 방법
WO2024109230A1 (zh) 一种无线发射系统、方法和电视机
US7027106B2 (en) Digital/analog broadcast receiver receiving digital/analog broadcast in range of read carrier frequency
US20200145040A1 (en) Demodulation apparatus, reception apparatus, and demodulation method
KR20100019010A (ko) 신호수신장치, 방송수신장치 및 이를 이용한 신호처리방법
JP2002354360A (ja) デジタル放送受信装置
CN100377581C (zh) 可转换无线电波模式输出的数字广播接收机
JP7043644B1 (ja) 通信システム
US12244405B2 (en) Reception device
KR101219008B1 (ko) 채널 스캔 방법 및 장치
TWI264882B (en) Digital broadcast receiver capable of switching radio frequency output modes
CN210112018U (zh) 一种数字音频广播接收机
JP4351865B2 (ja) アンテナ内蔵分離型デジタルチューナ機器とデジタル放送受信機を備えた受信装置
JP2006115149A (ja) デジタル受信機及びデジタル放送受信方法
KR100504773B1 (ko) 피씨의 디지털 방송수신용 장치
KR20060000713A (ko) 디지털 케이블 방송 수신 장치 및 방법
US20120133435A1 (en) Amplification Circuit, Electronic Device, Amplification Method
JP2001285222A (ja) 受信エリア監視・制御方法及び放送システム
KR100707665B1 (ko) 위성 방송 수신기에서 다이젝을 이용한 ｌｎｂ의 능동적ｈ/ｖ 선택 방법
KR100392630B1 (ko) 케이블 모뎀 내장형 셋탑박스에서의 통신 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23893324

Country of ref document: EP

Kind code of ref document: A1