CN211089789U

CN211089789U - Video transmission circuit and system compatible with DVBS2 and ATSC standard

Info

Publication number: CN211089789U
Application number: CN202020235163.9U
Authority: CN
Inventors: 龙宇环; 李荣明; 吴子明; 李勇
Original assignee: Dongguan Jinruixian Digital Technology Co ltd
Current assignee: Dongguan Jinruixian Digital Technology Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-07-24
Anticipated expiration: 2030-02-28

Abstract

A video transmission circuit compatible with DVBS2 and ATSC standards and a video transmission system compatible with DVBS2 and ATSC standards comprise an ATSC input port, a DVBS2 input port, a video conversion component and a selection control component, wherein the ATSC input port accesses an ATSC video signal and converts the ATSC video signal into a L VDS signal, the video conversion component converts a L VDS signal into an HDMI signal, the function selection component generates a first switching signal or a second switching signal according to the received selection signal, the DVBS2 input port drives a display module under the ATSC standards according to the first switching signal or drives the display module under the DVBS2 format according to the second switching signal, and the embodiment realizes the integrated design of the DVBS2 and the ATSC standards, is applicable to video transmission standards in different ranges and brings great convenience to a video playing process.

Description

Video transmission circuit and system compatible with DVBS2 and ATSC standard

Technical Field

The application belongs to the technical field of electronic circuits, and particularly relates to a video transmission circuit compatible with DVBS2 and ATSC standards and a video transmission system compatible with DVBS2 and ATSC standards.

Background

At present, there are three different standards for Digital tv, ATSC (Advanced Television systems committee) is the national standard for Digital tv in the united states, DVBS (Digital video Broadcasting-Satellite Broadcasting system standard) is the national standard for Digital tv in pan-europe, and based on DVBS, DVBS2 (new generation Digital Satellite Broadcasting standard) is derived, ISDB (Integrated services Digital Broadcasting) is the national standard for Digital tv in japan, and the standards used in different regions are inconsistent.

At present, televisions on the market basically support one of video signal standards, and the compatibility is low; for example, if a user uses a digital tv suitable for the ATSC standard in the united states, the digital tv cannot be used in european countries, which causes great inconvenience to the use of the digital tv and cannot meet the requirement of compatible use of digital tvs in different regions.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a video transmission circuit compatible with DVBS2 and ATSC standards and a video transmission system compatible with DVBS2 and ATSC standards, and aims to solve the problem that the conventional digital television can only support a single type of digital television standard and has low compatibility.

A first aspect of an embodiment of the present application provides a video transmission circuit compatible with DVBS2 and ATSC standards, which is connected to a display module, and includes:

an ATSC input port configured to access an ATSC video signal and convert said ATSC video signal into an L VDS signal;

a video conversion component coupled to the ATSC input port and configured to convert an L VDS signal to an HDMI signal;

a function selection component configured to generate a first switching signal or a second switching signal according to the received selection signal; and

the video conversion component, the function selection component and the display module are connected and configured to access the HDMI signal according to the first switching signal and output a first video decoding signal to the display module according to the HDMI signal, or access a DVBS2 video signal according to the second switching signal and output a second video decoding signal to a DVBS2 input port of the display module according to the DVBS2 video signal.

In one embodiment, the method further comprises:

a power supply enabling component connected between the ATSC input port and the DVBS2 input port and configured to output the power supply enabling signal output from the DVBS2 input port to the ATSC input port.

In one embodiment, the ATSC input port comprises: an ATSC control chip.

In one embodiment, the video conversion component comprises: and a video conversion chip.

In one embodiment, the method further comprises:

and an electromagnetic suppression component connected with the video conversion component and the DVBS2 input port and configured to perform electromagnetic interference suppression on the HDMI signal.

In one embodiment, the method further comprises:

a power supply component connected with the video conversion component and configured to output a power supply signal;

the video conversion component is used for converting the L VDS signal into an HDMI signal according to the power supply signal.

In one embodiment thereof, the power supply assembly comprises: and a voltage stabilizing chip.

In one embodiment, the method further comprises:

an information cue component coupled to the DVBS2 input port and configured to output a first information cue signal when the DVBS2 input port outputs the first video decoded signal and a second information cue signal when the DVBS2 input port outputs the second video decoded signal.

In one embodiment, the method further comprises:

a communication extension interface coupled to the video conversion component and configured to access communication signals;

the video conversion component is configured to convert the L VDS signal to an HDMI signal according to the communication signal.

A second aspect of an embodiment of the present application provides a video transmission system compatible with DVBS2 and ATSC standards, including: a video transmission circuit as described above.

Compared with the prior art, the video transmission circuit compatible with the DVBS2 and the ATSC standard has the advantages that the ATSC input port is used as a signal transmission channel of the DVBS2 control component, the video conversion component is used as a conversion bridge of a L VDS signal and an HDMI signal, the DVBS2 input port can be compatible with the HDMI signal and the DVBS2 video signal, the design of an all-in-one machine of the DVBS2 and the ATSC standard is achieved, the DVBS2 and the ATSC standard can be quickly switched through the function selection component, the compatibility of video transmission is high, and good visual experience is brought to people.

Drawings

Fig. 1 is a schematic structural diagram of a video transmission circuit compatible with DVBS2 and ATSC standards according to an embodiment of the present application;

fig. 2 is a schematic diagram of another structure of a video transmission circuit compatible with DVBS2 and ATSC standards according to an embodiment of the present application;

fig. 3 is a schematic circuit diagram of an ATSC input port according to an embodiment of the present application;

fig. 4 is a schematic circuit diagram of a video conversion module according to an embodiment of the present application;

fig. 5 is a schematic circuit diagram of a power supply module according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a video transmission system compatible with DVBS2 and ATSC standards according to an embodiment of the present application.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in 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.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Fig. 1 is a schematic diagram illustrating a structure of a video transmission circuit 10 compatible with DVBS2 and ATSC standards according to a preferred embodiment of the present application, the video transmission circuit 10 is connected to a display module 20, the video transmission circuit 10 is capable of outputting a video decoding signal to the display module 20 under a format of DVBS2 or ATSC standard so that the display module 20 can display a clear video in real time, and the video transmission circuit 10 has high video transmission compatibility; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:

the video transmission circuit 10 includes: ATSC input port 101, video conversion component 102, function selection component 103, and DVBS2 input port 104.

The ATSC input port 101 is configured to access an ATSC video signal and convert the ATSC video signal into an L VDS (L ow-Voltage Differential Signaling) signal.

Optionally, the ATSC video signal is originated from a mobile terminal or a storage medium, the ATSC video signal contains video data, and the ATSC input port 101 can compatibly identify and transmit the ATSC video signal.

The ATSC video signal is in an ATSC standard transmission format, the ATSC input port 101 performs format conversion on the ATSC video signal, and at this time, the ATSC input port 101 is used as a video transmission channel of ATSC, and L VDS signals are compatible for transmission in various communication environments so as to conform to the ATSC video transmission format.

The video conversion component 102 is connected to the ATSC input port 101 and configured to convert L VDS signals into HDMI (High Definition Multimedia Interface) signals.

The HDMI signal is suitable for the digital video transmission specification, supports the data transmission rate of 2.25GB/s, and contains complete image information after the video format of L VDS signal is converted by the video conversion component 104.

The function selection component 103 is configured to generate either a first switching signal or a second switching signal.

Optionally, the function selecting component 103 generates a first switching signal or a second switching signal according to a received selection signal, where the selection signal is input by a user using a key or input by the user using an electronic device, and the selection signal includes video selection information of the user, and the electronic device may be a remote controller, an intelligent terminal, or a server; the switching process between DVBS2 and the ATSC standard can be directly controlled by function selection component 103.

The DVBS2 input port 104 is connected to the video conversion module 102, the function selection module 103, and the display module 20, and is configured to access the HDMI signal according to the first switching signal and output the first video decoding signal to the display module 20 according to the HDMI signal, or access the DVBS2 video signal according to the second switching signal and output the second video decoding signal to the display module 20 according to the DVBS2 video signal.

The DVBS2 input port 104 can compatibly recognize the HDMI signal or the DVBS video signal, and the DVBS2 input port 104 outputs the first video decoding signal or the second video decoding signal to the display module 20, wherein the first video decoding signal or the second video decoding signal both include video data, so that the display module 20 video displays to conform to the ATSC standard or the DVBS2 video playing format.

Optionally, the DVBS2 input port 104 is connected to the mobile terminal, and the mobile terminal outputs the DVBS2 video signal to the DVBS2 input port 104, so that the DVBS2 input port 104 realizes a video driving function in the DVBS2 format, and outputs the second video decoding signal to the display module 20 through the DVBS2 input port 104, thereby ensuring the video signal conversion efficiency of the DVBS2 input port 104 in the DVBS2 format.

The function selection component 103 can directly control the signal conversion process of the input port 104 of the DVBS2, and the input port 104 of the DVBS2 realizes video driving under the ATSC standard or the DVBS2 format, so that the compatibility is strong; specifically, when the function selecting component 103 outputs the first switching signal to the DVBS2 input port 104, the DVBS2 input port 104 decodes the HDMI signal to obtain a first video decoding signal, and the display module 20 realizes video playing under the ATSC standard; when the function selecting module 103 outputs the second switching signal to the DVBS2 input port 104, the DVBS2 input port 104 decodes the DVBS2 video signal to obtain a second video decoding signal, and the display module 20 realizes video playing in the DVBS2 format.

In the present embodiment, the ATSC video signal includes audio data and video data matched with the audio data, and in the ATSC video transmission format, the video conversion component 102 converts the L VDS signal, and then the DVBS2 input port 104 drives the display module 20 to perform video display and audio playing under the ATSC standard.

In the DVBS2 video transmission format, the DVBS2 input port 104 directly accesses the DVBS2 video signal, the DVBS2 input port 104 implements video decoding in the DVBS2 transmission format, and the display module 20 brings high-end experience to the audiovisual demand of the user in the DVBS2 transmission format.

As an alternative implementation, fig. 2 shows another structural schematic of the video transmission circuit 10 provided in this embodiment, and compared with the structural schematic of the video transmission circuit 10 in fig. 1, the video transmission circuit 10 in fig. 2 further includes: and a power supply enabling component 105, wherein the power supply enabling component 105 is connected between the ATSC input port 101 and the DVBS2 input port 104, and is configured to output the power supply enabling signal output from the DVBS2 input port 104 to the ATSC input port 101.

When the function selection component 103 selects to output the first switching signal or the second switching signal, the ATSC input port 101 accesses the power supply enabling signal and successfully powers on, and after the ATSC input port 101 accesses the power supply enabling signal and successfully powers on, the ATSC input port 101 can realize ATSC video signal conversion and transmission.

As an alternative implementation, referring to fig. 2, the video transmission circuit 10 further includes: an Electromagnetic Interference (EMI) suppression component 106, the Electromagnetic Interference (EMI) suppression component 106 being connected to the video conversion component 102 and the DVBS2 input port 104 and configured to perform EMI suppression on the HDMI signal; the HDMI signal can be prevented from being distorted during transmission by the electromagnetic interference suppression component 106, the transmission path of the DHMI signal has higher interference immunity, and the DVBS2 input port 104 performs video driving according to the HDMI signal after electromagnetic interference suppression.

As an alternative embodiment, referring to fig. 2, the video transmission circuit 10 further includes a power supply component 107, the power supply component 107 is connected to the video conversion component 102 and configured to output a power signal, and the video conversion component 102 is configured to convert L VDS signals into HDMI signals according to the power signal.

The power supply component 107 supplies power to the video conversion component 102, and the power supply component 107 outputs a power supply signal according to the rated voltage and/or the rated current of the video conversion component 102, so that the power-on safety of the video conversion component 102 is guaranteed; after the video conversion component 102 is connected to the power signal, a stable signal conversion function can be realized.

As an alternative implementation, referring to fig. 2, the video transmission circuit 10 further includes: and the information prompting component 108, wherein the information prompting component 108 is connected with the input port 104 of the DVBS2 and is configured to output a first information prompting signal when the input port 104 of the DVBS2 outputs a first video decoding signal and output a second information prompting signal when the input port 104 of the DVBS2 outputs a second video decoding signal.

Optionally, the information prompt component 108 includes a display screen, and the ATSC video transmission state or the DVBS2 video transmission state can be indicated in real time through the display screen, so that a user can obtain the video format switching state of the video transmission circuit 10 in real time; illustratively, the information prompt component 108 emits light of a first color when the DVBS2 input port 104 is in the ATSC standard video transmission format, and the information prompt component 108 emits light of a second color when the DVBS2 input port 104 is in the DVBS2 video transmission format.

As an alternative implementation, referring to fig. 2, the video transmission circuit 10 further includes a communication extension interface 109, the communication extension interface 109 is connected to the video conversion component 102 and configured to access a communication signal, and the video conversion component 102 is configured to convert L VDS signals into HDMI signals according to the communication signal.

Optionally, the communication extension interface 109 is connected to the mobile terminal, the communication extension interface 109 accesses a communication signal output by the mobile terminal and controls a signal format conversion state of the video conversion component 102, and only when the video conversion component 102 receives the communication signal, the video conversion component 102 outputs an HDMI signal, so that the ATSC video transmission process of the video conversion component 102 has higher control flexibility.

As an optional implementation manner, the ATSC input port 101 includes an ATSC control chip, where the model of the ATSC control chip is MSD3553, the ATSC control chip implements video driving under an ATSC standard transmission format to convert an ATSC video signal, and the ATSC input port 101 has a relatively simplified circuit structure, fig. 3 shows a schematic circuit structure of the ATSC input port 101 provided in this embodiment, please refer to fig. 3, the ATSC input port 101 includes an ATSC control chip U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first inductor L1, a second inductor L2, and a first resistor R1.

An analog power supply pin AVDD of an ATSC control chip U1, a first end of a first capacitor C1, a first end of a first inductor L1 and a first end of a second inductor L2 are connected to a first direct current power supply in common, optionally, the first direct current power supply is a 3.3V direct current power supply, a second end of the first capacitor C1 is grounded GND, a second end of the first inductor L1 is connected with a voltage upper limit driving pin TFH of an ATSC control chip U1, a second end of the second inductor L2 is connected with a voltage lower limit driving tube TF L of the ATSC control chip U1, and an electric energy fluctuation range accessed by the ATSC control chip U1 can be limited by combining the voltage upper limit driving pin TFH and the voltage lower limit driving pin TF L, and the ATSC control chip U1 works in a rated voltage range.

The first end of the second capacitor C2 and the first end of the first resistor R1 are commonly connected to the voltage-stabilizing control pin CP of the ATSC control chip U1, the second end of the first resistor R1 is connected to the first end of the third capacitor C3, the first end of the fourth capacitor C4 is connected to the digital power pin DVSS of the ATSC control chip U1, the second end of the second capacitor C2, the second end of the third capacitor C3, the ground pin DVSS of the ATSC control chip U1, and the second end of the fourth capacitor C4 are commonly connected to the ground GND.

The video input pin of ATSC control chip U1 is used to access ATSC video signals.

The signal output pin of the ATSC control chip U1 is connected to the video conversion module 102.

As shown in FIG. 3, the video input pin of ATSC control chip U1 includes VOP and VON, and the signal output pin of ATSC control chip U1 includes XTA L _ 0.

As an alternative embodiment, the video conversion module 102 includes a video conversion chip U2, the model of the video conversion chip is L T2611, and the video conversion chip can convert L VDS signals into HDMI signals, thereby improving the efficiency of ATSC standard video transmission, for example, fig. 4 shows a schematic circuit structure of the video conversion module 102 provided in this embodiment, please refer to fig. 4, the video conversion module 102 includes a video conversion chip U2, a fifth capacitor C5, a sixth capacitor C6, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first crystal oscillator Y1.

The first input and output end of the first crystal oscillator Y1, the first end of the second resistor R2 and the first end of the fifth capacitor C5 are connected to the oscillation signal input end XTA L0 of the video conversion chip U2 in common, the second input and output end XTA L1 of the first crystal oscillator Y1, the second end of the second resistor R2 and the first end of the sixth capacitor C6 are connected to the oscillation signal output pin XTA L1 of the video conversion chip U2 in common, the second end of the fifth capacitor C5 and the second end of the sixth capacitor C6 are connected to the ground GND in common, and the oscillation frequency can be output to the video conversion chip U2 through the first crystal oscillator Y1.

A first end of the third resistor R3 and a first end of the fourth resistor R4 are commonly connected to a hot plug pin HTX _ HPD of the video conversion chip U1, a second end of the fourth resistor R4 is grounded GND, and a second end of the third resistor R3 is used for connecting in a hot plug driving signal; the video conversion chip U1 can be enabled to support the hot plug function by the hot plug driving signal.

The video input pin of video conversion chip U2 is connected to ATSC input port 101.

The signal output pin of the video conversion chip U2 is connected to the input port 104 of the DVBS 2.

As shown in FIG. 4, the video input pins of the video conversion chip U2 include L3 _ N2 and L3 _ P2, and the signal output pins of the video conversion chip U2 include L0 _ N0 and L0 _ P0.

As an alternative embodiment, the DVBS2 input port 104 includes: the model of the DVBS2 control chip is, for example, model number of DVBS2 control chip: MSD6a538, with the DVBS2 control chip, can implement video driving functions in either ATSC video format or DVBS2 video format.

As an alternative embodiment, the power module 107 includes a voltage regulator chip, where the model of the voltage regulator chip is L P3002, and after the power is converted by the voltage regulator chip, the power module 102 can be powered on safely, for example, fig. 5 shows a schematic circuit structure of the power module 107 provided in this embodiment, and referring to fig. 5, the power module 107 includes a voltage regulator chip U3, a fifth resistor R5, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10.

A power supply input pin VIN of the voltage stabilizing chip U1, a first end of a fifth resistor R5 and a first end of a seventh capacitor C7 are connected to a second direct-current power supply in common, and optionally, the second direct-current power supply is a 1-10V direct-current power supply; the second end of the seventh capacitor C7 is grounded to GND, the second end of the fifth resistor R5 and the first end of the eighth capacitor C8 are commonly connected to the enable control pin EN of the regulator chip U3, and the second end of the eighth capacitor C8 is grounded to GND.

The power output pin VOUT of the regulator chip U3, the first terminal of the ninth capacitor C9, and the first terminal of the tenth capacitor C10 are commonly connected to the video conversion module 102, the second terminal of the ninth capacitor C9 is connected to the ground GND, and the second terminal of the tenth capacitor C10 is connected to the ground GND.

Fig. 6 shows a schematic configuration of a DVBS2 and ATSC standard compatible video transmission system 60 by which the present embodiment passes, the ATSC video transmission system 60 including the video transmission circuit 10 as described above; referring to the embodiments shown in fig. 1 to fig. 5, the video transmission system 60 in this embodiment implements a DVBS2 and ATSC standard all-in-one design, which has higher compatibility and brings higher visual enjoyment to users.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A DVBS2 and ATSC compatible video transmission circuit coupled to a display module, the video transmission circuit comprising:

2. The video transmission circuit according to claim 1, further comprising:

3. The video transmission circuit of claim 1, wherein the ATSC input port comprises: an ATSC control chip.

4. The video transmission circuit of claim 1, wherein the video conversion component comprises: and a video conversion chip.

5. The video transmission circuit according to claim 1, further comprising:

6. The video transmission circuit according to claim 1, further comprising:

7. The video transmission circuit of claim 6, wherein the power supply component comprises: and a voltage stabilizing chip.

8. The video transmission circuit according to claim 1, further comprising:

9. The video transmission circuit according to claim 1, further comprising:

10. A video transmission system compatible with DVBS2 and ATSC standards, comprising: a video transmission circuit as claimed in any one of claims 1 to 9.