CN212936043U - Multiplex signal multiplexing device, multiplex signal multiplexer and system - Google Patents
Multiplex signal multiplexing device, multiplex signal multiplexer and system Download PDFInfo
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- CN212936043U CN212936043U CN202021953338.6U CN202021953338U CN212936043U CN 212936043 U CN212936043 U CN 212936043U CN 202021953338 U CN202021953338 U CN 202021953338U CN 212936043 U CN212936043 U CN 212936043U
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Abstract
The utility model provides a multiple signal multiplexing device, multiple signal multiplexer and system, the device is including receiving module, processing module and transmission module, and processing module's input is connected to receiving module's output, and processing module's output passes through transmission module and connects display terminal, wherein: the receiving module is used for receiving the radio frequency signal and sending a corresponding baseband signal to the processing module according to the received radio frequency signal; and the processing module is used for receiving the baseband signal sent by the receiving module, processing the received baseband signal to obtain a data stream signal, and outputting the data stream signal to the display terminal through the transmission module. The received radio frequency signals are converted to obtain data stream signals, and the data stream signals are sent to the display terminal, so that the requirement of the multiplex signal multiplexing device on a main control chip of the display terminal is reduced, and the multiplex signal multiplexing device is realized under the condition of not increasing the cost of a television.
Description
Technical Field
The utility model relates to a signal processing especially relates to a multiple signal multiplexing device, multiple signal multiplexer and system.
Background
Along with the popularization of smart televisions, the television function is more and more complicated, the USB interface is mostly installed to current smart televisions, multiplex can be realized to the utilization USB interface, and want to realize above-mentioned function, then need the main control chip have multichannel intermediate frequency signal input to need carry out video decoding to intermediate frequency signal, because need compromise display terminal system operation simultaneously and video decoding, consequently to display terminal's main control chip require very high, greatly increased the television cost.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a multiplex signal multiplexing device, multiplex signal multiplexer and system, aims at solving prior art and leads to the too high problem of display terminal cost for realizing that multiplex program is multiplexing.
In order to achieve the above object, the utility model provides a multiplex signal multiplexing device, multiplex signal multiplexing device includes receiving module, processing module and transmission module, receiving module's output is connected processing module's input, processing module's output passes through transmission module connects display terminal, wherein:
the receiving module is used for receiving the radio frequency signal and sending a corresponding baseband signal to the processing module according to the received radio frequency signal;
the processing module is configured to receive the baseband signal sent by the receiving module, process the received baseband signal to obtain a data stream signal, and output the data stream signal to a display terminal through a transmission module.
Optionally, the receiving module includes at least one tuner, and an output end of the tuner is connected to an input end of the processing module;
the tuner is used for tuning the received radio frequency signal to obtain a baseband signal and sending the baseband signal to the processing module.
Optionally, the processing module includes a demodulation unit and a conversion unit, an input end of the demodulation unit is connected to an output end of the tuner, an output end of the demodulation unit is connected to an input end of the conversion unit, and an output end of the conversion unit is connected to the transmission module.
Optionally, the demodulating unit includes at least one demodulator, the number of the demodulators is equal to the number of the tuners, the input terminals of the demodulators are connected to the output terminals of the tuners, the output terminals of the demodulators are connected to the input terminals of the converting unit,
the demodulator is configured to receive a baseband signal sent by the tuner, demodulate the received baseband signal to obtain a transport stream signal, and send the transport stream signal to the conversion unit.
Optionally, the conversion unit includes bridge chips, the number of the bridge chips is the same as the number of the tuners, the input ends of the bridge chips are connected to the output ends of the demodulators, the output ends of the bridge chips are connected to the transmission module,
the bridge chip is used for receiving the transmission stream signal sent by the demodulator, converting the transmission stream signal into a data stream signal, and sending the data stream signal to a display terminal through the transmission module.
Optionally, the transmission module includes at least one USB device interface, the number of the USB device interfaces is equal to the number of the tuners, the input end of the USB device interface is connected to the output end of the bridge chip, the output end of the USB device interface is connected to the display terminal,
and the USB equipment interface is used for receiving the data stream signal output by the bridging chip and sending the received data stream signal to the display terminal.
Optionally, the communication interface of the tuner is connected to an I2C bus, the communication interface of the demodulator is connected to an I2C bus, and the communication interface of the bridge chip is connected to an I2C bus.
Optionally, the transmission module further includes a power module, a power input end of the power module is connected to a positive power end of the USB device interface, a negative power end of the power module is connected to a negative power end of the USB device interface, and a power output end of the power module is respectively connected to the power end of the tuner, the power end of the demodulator, and the power end of the bridge chip.
In addition, to achieve the above object, the present invention also provides a multiplexer including the multiplex signal multiplexing device as described above.
In addition, in order to achieve the above object, the present invention further provides a multiplex signal multiplexing system, the system includes a display terminal and the multiplex signal multiplexer according to claim 9, the display terminal is provided with a USB host interface, the multiplex signal multiplexer is provided with a USB device interface, and the USB host interface is connected to the USB device interface.
The utility model provides a multiplex signal multiplexing device, multiplex signal multiplexer and system, the device is including receiving module, processing module and transmission module, receiving module's output is connected processing module's input, processing module's output passes through transmission module connects display terminal, wherein: the receiving module is used for receiving the radio frequency signal and sending a corresponding baseband signal to the processing module according to the received radio frequency signal; the processing module is configured to receive the baseband signal sent by the receiving module, process the received baseband signal to obtain a data stream signal, and output the data stream signal to a display terminal through a transmission module. The received radio frequency signals are converted to obtain data stream signals, and the data stream signals are sent to the display terminal, so that the requirement of the multiplex signal multiplexing device on a main control chip of the display terminal is reduced, and the multiplex signal multiplexing device is realized under the condition of not increasing the cost of a television.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of an embodiment of the multiplexing device of the present invention;
fig. 2 is a detailed block diagram of an embodiment of the multiplexing device of the present invention;
fig. 3 is a connection diagram of an I2C bus according to an embodiment of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
The reference numbers illustrate:
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a multiplex signal multiplexing device is applied to the multiplex signal multiplexer, please refer to fig. 1, and fig. 1 is the utility model discloses the functional module diagram of a multiplex signal multiplexing device embodiment. In this embodiment, the multiplexing apparatus includes a receiving module 100, a processing module 200, and a transmitting module 300, wherein an output terminal of the receiving module 100 is connected to an input terminal of the processing module 200, and an output terminal of the processing module 200 is connected to a display terminal through the transmitting module 300, wherein:
the receiving module 100 is configured to receive a radio frequency signal, and send a corresponding baseband signal to the processing module 200 according to the received radio frequency signal;
the processing module 200 is configured to receive the baseband signal sent by the receiving module 100, process the received baseband signal to obtain a data stream signal, and output the data stream signal to a display terminal through the transmission module 300.
The radio frequency signal is modulated and has an electric wave with a certain transmission frequency. To enable the over-the-air distribution of television signals, video must be modulated from the television signal into high frequency or radio frequency signals, each occupying a channel, so that multiple television programs can be simultaneously distributed over the air without causing confusion.
The baseband signal refers to an original electrical signal without modulation and is characterized by a low frequency, and the signal spectrum starts from the vicinity of zero frequency and has a low-pass form.
The data stream signal is a signal that can be directly played by the display terminal.
In the embodiment, the received radio frequency signal is converted to obtain the data stream signal, and the data stream signal is sent to the display terminal, so that the requirement of the multiplex signal multiplexing device on a main control chip of the display terminal is reduced, and the multiplex signal multiplexing device is realized without increasing the television cost.
Further, referring to fig. 2, the receiving module 100 includes at least one tuner 110, and an output terminal of the tuner 110 is connected to an input terminal of the processing module 200;
the tuner 110 is configured to tune the received radio frequency signal to obtain a baseband signal, and send the baseband signal to the processing module 200.
Further, the processing module 200 includes a demodulating unit 210 and a converting unit 220, an input end of the demodulating unit 210 is connected to an output end of the tuner 110, an output end of the demodulating unit 210 is connected to an input end of the converting unit 220, and an output end of the converting unit 220 is connected to the transmitting module 300.
Further, the demodulating unit 210 includes at least one demodulator 211, the number of the demodulators 211 is the same as the number of the tuners 110, the input terminal of the demodulator 211 is connected to the output terminal of the tuner 110, the output terminal of the demodulator 211 is connected to the input terminal of the converting unit 220,
the demodulator 211 is configured to receive a baseband signal sent by the tuner 110, demodulate the received baseband signal to obtain a transport stream signal, and send the transport stream signal to the conversion unit 220.
The demodulator 211 performs demodulation of the agc baseband signal into a TS signal, and the demodulator 211 performs channel search, agc, auto detection and frequency locking, FFT conversion, and the like.
Further, the conversion unit 220 includes bridge chips 221, the number of the bridge chips 221 is the same as the number of the tuners 110, the input end of the bridge chip 221 is connected to the output end of the demodulator 211, the output end of the bridge chip 221 is connected to the transmission module 300,
the bridge chip 221 is configured to receive the transport stream signal sent by the demodulator 211, convert the transport stream signal into a data stream signal, and send the data stream signal to a display terminal through the transmission module 300.
The bridge chip 221 is a TS-to-USB chip, and is configured to convert the TS signal into a USB data stream signal. Bridge 221 is widely used in PC TVs and TV sticks, such as CY7C68013 by Cypress, where CY7C68013 has a programmable slave FIFO interface, and can operate as master or slave depending on the setting. In addition, the method can also be realized by using an FPGA or a special chip
After the data reaches the bridge chip 221, it can be selected whether the bridge chip 221 is required to intervene in the received data or automatically submit the data to the host chip by USB. Since TS stream data is continuous data stream and is insensitive to data errors, the latter is generally selected under the tv main control chip because the latter adopts a direct mode, which can effectively exert the full-speed function of the bridge chip 221, and the USB3.0 can also be used to implement a USB 4K tv scheme, a 4K satellite tv, and the like.
Further, the transmission module 300 includes at least one USB device interface 310, the number of the USB device interfaces 310 is the same as the number of the tuners 110, the input end of the USB device interface 310 is connected to the output end of the bridge chip 221, the output end of the USB device interface 310 is connected to a display terminal,
the USB device interface 310 is configured to receive the data stream signal output by the bridge chip 221, and send the received data stream signal to the display terminal.
Further, referring to fig. 3, the communication interface of the tuner 110 is connected to the I2C bus, the communication interface of the demodulator 211 is connected to the I2C bus, and the communication interface of the bridge chip 221 is connected to the I2C bus.
Further, the transmission module 300 further includes a power module, a power input end of the power module is connected to a positive power end of the USB device interface 310, a negative power end of the power module is connected to a negative power end of the USB device interface 310, and a power output end of the power module is respectively connected to the power end of the tuner 110, the power end of the demodulator 211, and the power end of the bridge chip 221.
The following description is made in principle with reference to fig. 2:
The utility model discloses still protect a multiple signal multiplexer, this multiple signal multiplexer includes as above multiple signal multiplexing device, this multiple signal multiplexing device's structure can refer to above-mentioned embodiment, no longer gives details here. It should be understood that, since the protection device of the present embodiment adopts the technical solution of the above-mentioned multiplexing device, the protection device has all the advantages of the above-mentioned multiplexing device.
The utility model discloses still protect a multiple signal multiplex system the system include display terminal and as above the multiple signal multiplexer, be provided with USB host computer interface on the display terminal, be provided with USB equipment interface on the multiple signal multiplexer, USB host computer interface and USB equipment interface connection. It should be understood that, since the protection device of the present embodiment adopts the technical solution of the above-mentioned multiplexer, the protection device has all the advantages of the above-mentioned multiplexer.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. The term "comprising", without further limitation, means that the element so defined is not excluded from the group of processes, methods, articles, or systems that include the element. The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a multiplex signal multiplexing device, its characterized in that, the device includes receiving module, processing module and transmission module, the output of receiving module is connected processing module's input, processing module's output passes through transmission module connects display terminal, wherein:
the receiving module is used for receiving the radio frequency signal and sending a corresponding baseband signal to the processing module according to the received radio frequency signal;
the processing module is configured to receive the baseband signal sent by the receiving module, process the received baseband signal to obtain a data stream signal, and output the data stream signal to a display terminal through a transmission module.
2. The signal multiplexing device of claim 1 wherein said receiving module includes at least one tuner, an output of said tuner being connected to an input of said processing module;
the tuner is used for tuning the received radio frequency signal to obtain a baseband signal and sending the baseband signal to the processing module.
3. The apparatus according to claim 2, wherein the processing module comprises a demodulating unit and a converting unit, an input terminal of the demodulating unit is connected to an output terminal of the tuner, an output terminal of the demodulating unit is connected to an input terminal of the converting unit, and an output terminal of the converting unit is connected to the transmitting module.
4. The multiplex signal multiplexing apparatus according to claim 3, wherein said demodulating unit includes at least one demodulator, the number of said demodulators corresponding to the number of tuners, the inputs of said demodulators being connected to the outputs of said tuners, the outputs of said demodulators being connected to the inputs of said converting unit,
the demodulator is configured to receive a baseband signal sent by the tuner, demodulate the received baseband signal to obtain a transport stream signal, and send the transport stream signal to the conversion unit.
5. The multiplex signal multiplexing device according to claim 4, wherein said conversion unit includes bridge chips, the number of said bridge chips is equal to the number of tuners, the input terminals of said bridge chips are connected to the output terminals of said demodulators, the output terminals of said bridge chips are connected to said transmission module,
the bridge chip is used for receiving the transmission stream signal sent by the demodulator, converting the transmission stream signal into a data stream signal, and sending the data stream signal to a display terminal through the transmission module.
6. The multiplexing device of claim 5, wherein the transmission module comprises at least one USB device interface, the number of the USB device interfaces is equal to the number of the tuners, the input terminal of the USB device interface is connected to the output terminal of the bridge chip, the output terminal of the USB device interface is connected to the display terminal,
and the USB equipment interface is used for receiving the data stream signal output by the bridging chip and sending the received data stream signal to the display terminal.
7. The multiplexing device of claim 6 wherein the communication interface of the tuner is connected to an I2C bus, the communication interface of the demodulator is connected to an I2C bus, and the communication interface of the bridge chip is connected to an I2C bus.
8. The multiplexing device according to claim 6, wherein the transmission module further comprises a power module, a power input terminal of the power module is connected to a positive power terminal of the USB device interface, a negative power terminal of the power module is connected to a negative power terminal of the USB device interface, and a power output terminal of the power module is respectively connected to the power terminals of the tuner, the demodulator and the bridge chip.
9. A multiplexer, characterized in that it comprises a multiplexing device according to any one of claims 1 to 8.
10. A multiplex signal multiplexing system comprising a display terminal and the multiplex signal multiplexer of claim 9, wherein the display terminal is provided with a USB host interface, the multiplex signal multiplexer is provided with a USB device interface, and the USB host interface is connected to the USB device interface.
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| CN202021953338.6U CN212936043U (en) | 2020-09-08 | 2020-09-08 | Multiplex signal multiplexing device, multiplex signal multiplexer and system |
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| CN202021953338.6U CN212936043U (en) | 2020-09-08 | 2020-09-08 | Multiplex signal multiplexing device, multiplex signal multiplexer and system |
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