CN113163195A - Demodulation board card - Google Patents

Abstract

The application discloses demodulation integrated circuit board, demodulation integrated circuit board includes: and a tuning module. The demodulation module is connected with the tuning module and is used for demodulating the frequency point signal to generate a demodulation signal. The first control module is connected with the demodulation module. The second control module is connected with the first control module. The descrambling port is connected with the first control module. The first control module sends an identification instruction based on the received demodulation signal, the second control module sends a descrambling instruction to the first control module according to the identification instruction, and the first control module responds to the descrambling instruction to perform information interaction with a descrambling port and descrambles the demodulation signal to generate a descrambling signal. The demodulation board card provided by the application is designed based on the 6U standard, and has the characteristic of strong universality; in addition, the demodulation board card of the application also has the dual functions of demodulation and descrambling of radio frequency signals, the using functions of the demodulation board card are effectively enriched, and the using requirements of cable digital television monitoring equipment and users are further met.

Description

Demodulation board card

Technical Field

The application relates to the technical field of board card equipment, in particular to a demodulation board card.

Background

The cable digital television monitoring device comprises: the system comprises a case, a monitoring board card, a network switching board card, a main control board card, a demodulation board card, a transcoding board card, a power supply board card, a liquid crystal display and a fan module.

The existing demodulation board card has the defects of no unified software and hardware standardized design, low integration level and low expansibility. The method specifically comprises the following aspects: 1. the integration level is low, and the occupied cabinet space is large; 2. the function is single, and the use requirement of the cable digital television monitoring equipment cannot be met; 3. the maintenance is difficult, and the carrying is inconvenient; 4. the expansibility is poor, and the coupling degree is low.

Therefore, the current demodulation board card lacks a standardized design and has a single function, so that the practicability of the demodulation board card is poor, and the use experience of a user is influenced.

Content of application

Objects of the invention

The application provides a demodulation integrated circuit board, this demodulation integrated circuit board have that expansibility is strong and the abundant characteristics of function, can show the practicality that promotes the demodulation integrated circuit board, satisfy cable digital television monitoring facilities's user demand.

(II) technical scheme

In a first aspect, an embodiment of the present application provides a demodulation board card designed based on a standard 6U, including a tuning module, a demodulation module, a first control module, a second control module, and a descrambling port, where the tuning module is configured to perform frequency point analysis on a radio frequency signal to select a frequency point signal. The demodulation module is connected with the tuning module and is used for demodulating the frequency point signal to generate a demodulation signal. The first control module is connected with the demodulation module. The second control module is connected with the first control module. And the descrambling port is connected with the first control module.

The first control module sends an identification instruction based on the received demodulation signal, the second control module sends a descrambling instruction to the first control module according to the identification instruction, and the first control module responds to the descrambling instruction to perform information interaction with the descrambling port and descrambles the demodulation signal so as to generate a descrambling signal.

In some embodiments, the descrambling port and the first control module interact through a DVB-CI port.

In some of these embodiments, a substrate board, a first network card, and a CPCI adapter are also included. The base material board is provided with the tuning module, the demodulation module, the first control module, the second control module and the descrambling port. The first network card is arranged on the substrate board, and the first control module is connected with one end of the first network card. The CPCI adapter is arranged on the substrate board and connected with the other end of the first network card. Wherein the descrambling signal is configured to be output through the CPCI adaptor.

In some embodiments, the mobile phone further comprises a second network card, the second network card is disposed on the substrate board, one end of the second network card is connected to the first control module, and the other end of the second network card is connected to the CPCI adapter.

In some of these embodiments, a faceplate and two extraction aids are also included. A faceplate is located at an opposite end of the substrate board from the CPCI adapter. The two pull-out aids are arranged at two opposite ends of the panel, and the demodulation board card is detachably arranged in the clamping groove of the case through the two pull-out aids. Wherein the descrambling port is arranged on the panel.

In some of these embodiments, the demodulator card further includes a signal port. The signal port is arranged on the panel and is used for transmitting the input of the radio frequency signal.

In some of these embodiments, the demodulator cards further include a network port. And the network port is arranged on the panel. The demodulation board card is configured to be in network connection with an external device through the network port.

In other embodiments, the demodulator card further comprises a reset key, a power indicator light and a status indicator light disposed on the panel. The reset key, the power indicator and the status indicator are electrically connected with the substrate plate through the panel.

In other embodiments, the panel has a length dimension of 266.7mm, and two of the extraction aids are disposed at opposite ends of the panel in the length direction. The power indicator and the status indicator are arranged along the width direction of the panel, the reset key, the network port and the signal port are arranged along the length direction, and the power indicator and the status indicator are positioned between the reset key and the network port along the length direction.

In a second aspect, an embodiment of the present application provides a cable digital television monitoring front-end device, including any one of the above demodulation board cards.

(III) advantageous effects

The technical scheme of the invention has the following beneficial technical effects: the demodulation board card provided by the application is designed based on the 6U standard, and has the characteristic of strong universality; in addition, the demodulation board card of the application also has the dual functions of demodulation and descrambling of radio frequency signals, the using functions of the demodulation board card are effectively enriched, and the using requirements of cable digital television monitoring equipment and users are further met.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings 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 application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a block diagram of a working principle of a demodulation board card according to an embodiment of the present application;

fig. 2 is a block diagram illustrating a working principle of a demodulation board card according to an embodiment of the present application;

fig. 3 is a structural diagram of a demodulation board according to an embodiment of the present application;

fig. 4 is a structural diagram of a demodulator card according to an embodiment of the present application.

The attached drawings indicate the following:

110. the device comprises a tuning module, 120, a demodulation module, 130, a first control module, 140, a second control module, 150, a descrambling port, 160, a substrate board, 170, a first network card, 180, a CPCI adapter, 190, a second network card, 200, a DVB-CI port, 300, a panel, 400, a plug assistant, 310, a signal port, 320, a network port, 330, a reset key, 340, a power indicator, 350, a status indicator, 360 and an information nameplate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The cable digital television monitoring equipment comprises a case, a monitoring board card, a network switching board card, a main control board card, a demodulation board card, a transcoding board card, a power supply board card, a liquid crystal screen and a fan module.

In the process of implementing the demodulation board card based on the related art, the inventor finds that the current demodulation board card in the related art lacks a standardized design and has a single function, so that the practicability of the demodulation board card is poor, and the use experience of a user is influenced.

In view of the above technical problems, as shown in fig. 1 to 4, a first embodiment of the present application provides a demodulation board card designed based on a standard 6U, where the demodulation board card includes a tuning module 110, a demodulation module 120, a first control module 130, a second control module 140, and a descrambling port 150, and the tuning module 110 is configured to perform frequency point analysis on a radio frequency signal to select a frequency point signal. The demodulation module 120 is connected to the tuning module 110, and the demodulation module 120 is configured to demodulate the frequency point signal to generate a demodulated signal. The first control module 130 is connected to the demodulation module 120. The second control module 140 is connected to the first control module 130, and the descrambling port 150 is electrically connected to the first control module 130.

The first control module 130 sends an identification instruction based on the received demodulation signal, the second control module 140 sends a descrambling instruction to the first control module 130 according to the identification instruction, and the first control module 130 performs information interaction with the descrambling port 150 in response to the descrambling instruction, and descrambles the demodulation signal to generate a descrambling signal.

The demodulation integrated circuit board in this application embodiment has the characteristics that the integrated level is high based on the standard design of 6U (44.45 mm is 1U, 266.7mm is 6U), and in addition, the demodulation integrated circuit board of this application still has the dual function to the demodulation of radio frequency signal and descrambling, and the characteristics that the commonality is strong can effectively enrich the service function of demodulation integrated circuit board, further satisfies wired digital television monitoring facilities and user's user demand.

The tuning module 110 may be a tuner, the demodulation module 120 may be a demodulator, the descrambling port 150 may be a PCMCIA (PERSONAL COMPUTER memory device INTERNATIONAL ASSOCIATION) interface, when the demodulation board performs descrambling, a CAM (video card) card is installed in the descrambling port 150, each CAM card stores a key (authorization information) corresponding to a demodulation signal to be descrambled, and the key corresponds to the demodulation signal to be descrambled one by one, and if the key is successfully bound to the demodulation signal to be descrambled, a descrambling signal is generated and output to the chassis.

Further, the descrambling port 150 and the first control module 130 may interact with signals through a DVB-CI (DVB general interface for conditional access and other control applications) port 200.

In some embodiments, the demodulator card further includes a substrate board 160, a first network card 170, and a CPCI adapter 180. The substrate board 160 is provided with a tuning module 110, a demodulation module 120, a first control module 130, a second control module 140, and a descrambling port 150. The first network card 170 is disposed on the substrate 160, and the first control module 130 is connected to one end of the first network card 170. The CPCI adapter 180 is disposed on the substrate 160, and the CPCI adapter 180 is connected to the other end of the first network card 170. Wherein the descrambled signal is configured to be output through the CPCI adaptor 180.

In the embodiment of the present application, the CPCI adapter 180 has the advantages of hot plug, high openness, high reliability, and the like, and meanwhile, the CPCI adapter 180 has a higher bandwidth, and can implement high-speed data communication. Compared with the traditional design, the demodulation board card designed by the CPCI adapter 180 has higher durability and shock resistance, and can meet the specialized requirements of users.

The demodulation board card may further include a second network card 190, the second network card 190 is disposed on the substrate board 160, one end of the second network card 190 is connected to the first control module 130, and the other end is connected to the CPCI adapter 180. The first network card 170 and the second network card 190 are used for demodulating information interaction between the board card and the chassis. The first network card 170 and the second network card 190 may both be ethernet cards.

In the above application embodiment, the first network card 170 and the second network card 190 are arranged on the demodulation board card, so that the bandwidth of communication between the demodulation board card and the chassis can be significantly increased, and the practicability of the demodulation board card and the use experience of a user are further improved.

As can be seen from the above, the main control board is electrically connected to the slot in the slot of the chassis through the CPCI adapter 180, so that the descrambling signal output by the first control module 130 is transmitted to the chassis through the first network card 170 and/or the second network card 190. By configuring the first network card 170 and the second network card 190, the information transmission efficiency between the demodulation board card and the chassis and the requirement of big data communication can be effectively improved, so that the demodulation card has the characteristics of supporting the CPCI connection of the dual ethernet interfaces and supporting the data and management of the dual ethernet interfaces to be flexibly deployed.

In some embodiments, the number of descrambling ports 150 may be multiple, specifically, the number of descrambling ports 150 may be four, the tuning module 110 performs frequency point analysis on the radio frequency signal, may generate four modulated signals, and the four modulated signals are demodulated by the demodulation module 120 to generate four demodulated signals. The demodulation module 120 can simultaneously and independently demodulate four modulated signals.

The number of the DVB-CI ports 200 may be multiple, specifically four, the four DVB-CI ports 200 correspond to the four descrambling ports 150 one to one, and the demodulation board further includes an analog-to-digital conversion module (not shown in the figure), where the analog-to-digital conversion module is configured to perform analog-to-digital conversion on the demodulated signal to generate a digital demodulation signal. Four CAM cards are correspondingly installed in the four descrambling ports 150, each CAM card stores a key corresponding to the demodulation signal to be descrambled, the keys correspond to the demodulation signal to be descrambled one by one, if the keys are successfully bound with the demodulation signal to be descrambled, a descrambling signal is generated and is output to the case through the CPCI adapter 180. The four descrambling ports 150 can descramble the four demodulated signals independently at the same time. And descrambling port 150 includes, but is not limited to, various CAM cards that can be plugged in, including perpetual video, abacus, digital video, kanis, edid, and via.

In the embodiment of the present application, the four descrambling ports 150 can independently descramble four paths of demodulated signals at the same time, thereby significantly improving the descrambling efficiency of the demodulation card and meeting the use requirements of users.

In some embodiments, the demod board further comprises a faceplate 300 and two pull-outs 400. The panel 300 is located at the opposite end of the substrate board 160 from the CPCI adapter 180. The two pull-out aids 400 are disposed at opposite ends of the panel 300, and the demodulation board card is configured to be detachably mounted in the slot of the chassis through the two pull-out aids 400. Wherein the descrambling port 150 is arranged at the panel 300.

Further, the demodulation board further includes a signal port 310, where the signal port 310 is configured to receive an RF signal modulated based on QAM (Quadrature Amplitude Modulation), and specifically supports 16/32/64/128/256QAM demodulation mode. The signal port 310 is disposed on the panel 300, and the signal port 310 is used for transmitting an input of an rf signal. The signal port 310 may be an RF (radio frequency signal) signal port 310.

In other embodiments, the demodulator card further includes a network port 320. Network port 320 is disposed on panel 300. The demodulator card is configured to be connected to an external device through a network port 320. Or the external device is configured to electrically debug the demodulator card through the network port 320. The network port 320 is an RJ45 type serial interface.

Similarly, the demodulator card further includes a reset key 330, a power indicator 340 and a status indicator 350 disposed on the panel 300. The reset key 330, the power indicator 340 and the status indicator 350 are electrically connected to the substrate board 160 through the panel 300. Reset key 330 may support independent resetting of the demodulator cards.

Specifically, the panel 300 may be rectangular, the length dimension of the panel 300 is based on a standard 6U design (1U ═ 44.45mm), that is, the length dimension of the panel 300 is 266.7mm, and two extraction aids 400 are disposed at opposite ends of the panel 300 in the length direction. The power indicator lights 340 and the status indicator lights 350 are arranged along the width direction of the panel 300, the reset key 330, the network ports 320 and the signal ports 310 are arranged along the length direction, and along the length direction, the power indicator lights 340 and the status indicator lights 350 are positioned between the reset key 330 and the network ports 320, and the four descrambling ports 150 are arranged in the panel 300 in a rectangular array.

The reset key 330 is used for resetting the demodulation card, the power indicator 340 is used for displaying the power-on state of the demodulation card, and the status indicator 350 is used for displaying the working state of the demodulation card.

In the embodiment of the present application, the descrambling port 150, the two unplugging aids 400, the signal port 310, the network port 320, the reset key 330, the power indicator 340 and the status indicator 350 are integrated on the panel 300, and the panel 300 is designed based on the 6U standard, so as to identify that the demodulation board card of the present application has the characteristics of high integration level and rich functions, and can meet the pursuit of miniaturization and standardization of equipment and the use requirements of users.

Further, the demodulation board card can further include an information nameplate 360, and the information nameplate 360 is disposed on the panel 300, so that a user can recognize the function and the use method of the demodulation board card through the information nameplate 360. The information nameplate 360 can be a two-dimensional code nameplate.

In another embodiment, the demod board further supports SPTS (Single-program transport stream) and MPTS (Multi-program transport stream) output.

In a second aspect, an embodiment of the present application provides a cable digital television monitoring front-end device, including any one of the above demodulation board cards.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the above terms will be understood by those skilled in the art according to the specific situation.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A demodulation board card, wherein the demodulation board card is designed based on standard 6U, comprising:

the tuning module (110) is used for carrying out frequency point analysis on the radio frequency signals so as to select the frequency point signals;

the demodulation module (120) is connected with the tuning module (110), and the demodulation module (120) is used for demodulating the frequency point signals to generate demodulated signals;

a first control module (130) connected to the demodulation module (120);

a second control module (140) connected to the first control module (130);

a descrambling port (150) connected with the first control module (130);

the first control module (130) sends an identification instruction based on the received demodulation signal, the second control module (140) sends a descrambling instruction to the first control module (130) according to the identification instruction, and the first control module (130) responds to the descrambling instruction to perform information interaction with the descrambling port (150) and descrambles the demodulation signal so as to generate a descrambling signal.

2. The board of claim 1,

the descrambling port (150) and the first control module (130) interact through a DVB-CI port (200).

3. The board card of claim 1, further comprising:

a substrate board (160), the substrate board (160) having the tuning module (110), the demodulation module (120), the first control module (130), the second control module (140), and the descrambling port (150) disposed thereon;

the first network card (170) is arranged on the substrate board (160), and the first control module (130) is connected with one end of the first network card (170);

the CPCI adapter (180) is arranged on the substrate board (160), and the CPCI adapter (180) is connected with the other end of the first network card (170);

wherein the descrambling signal is configured to be output through the CPCI adaptor (180).

4. The board card of claim 3, further comprising:

and the second network card (190) is arranged on the substrate board (160), one end of the second network card (190) is connected with the first control module (130), and the other end of the second network card (190) is connected with the CPCI adapter (180).

5. The board card of claim 3, further comprising:

a faceplate (300) located at an opposite end of the substrate plate (160) from the CPCI adapter (180);

the two unplugging assisters (400) are arranged at two opposite ends of the panel (300), and the demodulation board card is detachably arranged in a clamping groove of the case through the two unplugging assisters (400);

wherein the descrambling port (150) is provided to the panel (300).

6. The demodulator card of claim 5, further comprising:

a signal port (310) disposed on the panel (300), the signal port (310) for transmitting an input of the radio frequency signal.

7. The demodulator card of claim 6, further comprising:

a network port (320) provided to the panel (300);

wherein the demodulator card is configured to be network connected to an external device through the network port (320).

8. The demodulator card of claim 7, further comprising:

a reset key (330), a power indicator (340) and a status indicator (350) disposed on the panel (300);

the reset key (330), the power indicator (340) and the status indicator (350) are electrically connected to the substrate board (160) through the panel (300).

9. The demodulator card of claim 8,

the length of the panel (300) is 266.7mm, and the two extraction aids (400) are arranged at two opposite ends of the panel (300) in the length direction;

the power indicator (340) and the status indicator (350) are arranged along a width direction of the panel (300), the reset key (330), the network port (320) and the signal port (310) are arranged along the length direction, and the power indicator (340) and the status indicator (350) are located between the reset key (330) and the network port (320) along the length direction.

10. A cable digital television monitoring headend comprising the demodulator card of any of claims 1-9.

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