CN210745355U - Audio and video switching circuit applied to vehicle-mounted equipment, vehicle-mounted equipment and vehicle - Google Patents
Audio and video switching circuit applied to vehicle-mounted equipment, vehicle-mounted equipment and vehicle Download PDFInfo
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Abstract
The utility model provides an audio frequency and video switching circuit, mobile unit and vehicle for mobile unit, audio frequency and video switching circuit includes: the device comprises an image acquisition component, a video control component, a video conversion component and a video switching component; the image acquisition assembly acquires image information of a preset area and generates an image processing signal; when the video control component detects that the earphone is accessed, a first switching signal is generated; when the earphone access is not detected, generating a second switching signal; when the earphone is connected, the video conversion assembly converts the composite video signal output by the earphone into a digital video signal; the video switching component outputs the digital video signal according to the first switching signal or outputs the image processing signal according to the second switching signal; according to the embodiment of the application, switching output can be performed between the digital video signal and the image processing signal according to the plugging condition of the earphone on the vehicle-mounted equipment, the compatibility is strong, the video switching process is simple and convenient, and the audio and video switching control cost is reduced.
Description
Technical Field
The application belongs to the technical field of electronic circuits, and particularly relates to an audio and video switching circuit applied to vehicle-mounted equipment, the vehicle-mounted equipment and a vehicle.
Background
Along with the continuous improvement of present people's standard of living, the car has become the indispensable electron device of people's daily life ratio gradually, and the function of car is more and more diversified, the car not only belongs to a vehicle, the mobile unit on the car has each aspect function such as audio playback, video playback and information recording, therefore the all-round operation function of mobile unit has extremely important practical meaning to the practical value of car, and mobile unit can realize compatible communication function with external terminal, therefore mobile unit has higher control security and reliability.
In order to meet the video control requirements of people, the vehicle-mounted equipment needs to be equipped with a video transmission function, so that people can view corresponding video information on a vehicle in real time, and the vehicle has an all-round control function; however, the video data streams output by the external terminal have different types and transmission modes, but the conventional vehicle-mounted device can only be applied to the transmission process of the video data streams of a single type, and cannot be compatible with the input and output of the video data streams of different types, so that the quality and efficiency of video transmission and video storage of the vehicle-mounted device are reduced, the application range and the practical value of the vehicle-mounted device are greatly limited, and great inconvenience is brought to the video watching process of a user.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the application provides an audio and video switching circuit applied to an on-board device, the on-board device and a vehicle, and aims to solve the problems that the conventional technical scheme only supports a transmission function of a single type of video data stream, the compatibility and the reliability are low, great inconvenience is brought to a video control process of the on-board device, and the practical value is low.
A first aspect of the embodiments of the present application provides an audio/video switching circuit applied to an on-vehicle device, including:
the image acquisition assembly is configured to acquire image information of a preset area and generate an image processing signal;
configured to detect whether to access a headset, and when detecting that the headset is accessed, generating a first switching signal; when the earphone is not detected to be accessed, the video control component generates a second switching signal;
a video conversion component configured to receive a composite video signal output by the headset and convert the composite video signal into a digital video signal when the headset is accessed; and
and the video switching component is connected with the image acquisition component, the video conversion component, the video control component and the signal storage device and is configured to output the digital video signal according to the first switching signal or output the image processing signal according to the second switching signal.
In one embodiment, the video control assembly comprises:
a video detection part configured to generate a first level signal when the earphone is detected to be accessed, and generate a second level signal when the earphone is not detected to be accessed; and
and a video encoding unit connected to the video detection unit and the video switching module, and configured to generate the first switching signal according to the first level signal or generate the second switching signal according to the second level signal.
In one embodiment thereof, the video detection component comprises:
the circuit comprises a first resistor, a second resistor, a third resistor, a first diode and a first interface chip;
a first end of the first resistor and a first end of the second resistor are connected in common to form a detection end of the video detection component, the detection end of the video detection component is used for detecting whether the earphone is connected or not, a second end of the first resistor, a first end of the third resistor and a cathode of the first diode are connected in common to a switching detection pin of the first interface chip, and a second end of the second resistor, a second end of the third resistor and an anode of the first diode are connected in common to the ground;
and the signal output pin of the first interface chip is connected with the video coding component.
In one embodiment thereof, the video encoding means comprises: the video coding chip, wherein the model of video coding chip is: HI3516CV 300;
the level input pin of the video coding chip is connected with the video detection component;
and a switching control pin of the video coding chip is connected with the video switching component.
In one embodiment thereof, the image acquisition assembly comprises: an image sensor chip, wherein the model of the image sensor chip is: IMX 291.
In one embodiment, the video conversion component comprises: an analog-to-digital conversion chip; the type of the analog-to-digital conversion chip is as follows: NVP 6112.
In one embodiment, the method further comprises:
the power supply conversion assembly is connected with the image acquisition assembly, the video control assembly, the video conversion assembly, the video switching assembly and the power supply device, is configured to convert electric energy output by the power supply device and supplies power to the image acquisition assembly, the video control assembly, the video conversion assembly and the video switching assembly.
A second aspect of the embodiments of the present application provides an in-vehicle apparatus, including:
an earphone socket for connecting the earphone;
according to the audio and video switching circuit, the audio and video switching circuit is connected with the earphone socket; and
and the signal storage equipment is connected with the audio and video switching circuit.
In one embodiment thereof, the vehicle-mounted device includes at least any one of a vehicle-mounted digital video recorder and a vehicle-mounted automobile drive recorder.
A third aspect of an embodiment of the present application provides a vehicle including:
the vehicle-mounted device as described above; and
and the power interface is connected with the vehicle-mounted equipment and used for transmitting the power supply electric energy output by the power adapter to the vehicle-mounted equipment when the power adapter is accessed.
The audio and video switching circuit applied to the vehicle-mounted equipment collects the video data streams in the external environment through the image collecting assembly and can be accessed to the video data streams in the earphones through the video conversion assembly, so that the audio and video switching circuit can be compatibly accessed to two paths of video data streams, and the control flexibility is high; the video control assembly can control the video switching assembly to switch between two paths of video data streams by detecting the plugging and unplugging of the earphones so as to output image information in an external environment or image information prestored by the earphones, the switching of the video data streams is simple, the cost is low, the video control diversity of the vehicle-mounted equipment is favorably improved, the actual video control requirement of a user is met, and the compatibility is strong; and when one of the video data streams fails, the other video data stream can be switched to for input through the video switching component, so that different vehicle-mounted monitoring scenes are met, and the user experience and the emergency monitoring capability are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an audio/video switching circuit applied to an on-vehicle device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a video control module according to an embodiment of the present application;
fig. 3 is a schematic circuit diagram of a video detection component according to an embodiment of the present application;
fig. 4 is a schematic circuit diagram of a video encoding unit according to an embodiment of the present application;
fig. 5 is another schematic structural diagram of an audio/video switching circuit applied to an in-vehicle device according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of an in-vehicle device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
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.
Referring to fig. 1, a schematic structural diagram of an audio/video switching circuit 10 applied to a vehicle-mounted device according to an embodiment of the present disclosure is provided, where the vehicle-mounted device includes a signal storage device and a signal display device, and the signal storage device is used for storing information, and the signal display device is used for displaying video; for example, the signal storage device can be used for accessing and storing the video data stream in real time, so that a user can conveniently extract the video data stream stored by the signal storage device in real time, the working state of the vehicle can be monitored more accurately and in real time based on the video data stream, and better use experience is brought to the user; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:
the audio/video switching circuit 10 includes: an image acquisition component 101, a video control component 102, a video conversion component 103, and a video switching component 104.
Wherein the image acquisition assembly 101 is configured to acquire image information of a preset area and generate an image processing signal.
Optionally, the preset area is a preset environment range, and for example, the preset area is a preset environment range around the vehicle-mounted device, so that the image acquisition assembly 101 can sensitively and accurately acquire surrounding environment information of the vehicle-mounted device, and further monitor the physical safety state of the vehicle in real time; after the format of the image information is converted by the image acquisition assembly 101, the image processing signal generated by the image acquisition assembly 101 belongs to the power signal, so that the image information in the external environment can be acquired in real time by the image acquisition assembly 101, the processing efficiency of the video data stream is improved, and the application range is wide.
The video control component 102 is configured to detect access to the headset, and when headset access is detected, generate a first switching signal; when the earphone access is not detected, a second switching signal is generated.
The earphone has a video information transmission function, whether the earphone is connected to the vehicle-mounted equipment or not can be detected through the video control component 102, and when the earphone is connected with the vehicle-mounted equipment in an electric power mode, the video data stream in the earphone can be processed and converted through the vehicle-mounted equipment; therefore, by detecting the plugging state of the earphone on the vehicle-mounted device, the video control component 102 respectively generates corresponding switching signals, and the video data stream switching function is realized through the switching signals, so that the audio and video switching efficiency and precision of the interior of the vehicle-mounted device are improved; when the earphone is inserted into the vehicle-mounted device or the earphone is not inserted into the vehicle-mounted device, the audio/video switching circuit 10 can respectively control and process different types of video data streams, the operation is simple and convenient, and the multifunctional audio/video control requirements of users are met.
The video conversion component 103 is configured to receive the composite video signal output by the headset and convert the composite video signal to a digital video signal when the headset is plugged in.
When the earphone is connected to the vehicle-mounted equipment and the data communication function is realized between the earphone and the vehicle-mounted equipment, the video conversion component 103 can acquire video information in the earphone; illustratively, the Composite video Signal is in a CVBS (Composite video broadcast Signal) format, and then the Composite video Signal transmits data in an analog waveform, and the Composite video contains color difference (hue and saturation) and brightness (brightness) information, and synchronizes them in a blanking pulse, and transmits them in the same Signal, so that the Composite video Signal contains a large amount of video data, and the integrity of the video data can be secured by the Composite video Signal, avoiding image distortion; in this embodiment, the video conversion component 103 can compatibly obtain video data output by the earphone, and perform signal format conversion on the composite video signal, the digital video signal can be compatibly transmitted in the audio/video switching circuit 10, the audio/video switching circuit 10 can identify the video data in the digital video signal, the video conversion component 103 has higher signal conversion accuracy, and the application range of the audio/video switching circuit 10 is improved.
The video switching component 104 is connected to the image capturing component 101, the video converting component 103 and the video control component 102, and is configured to output a digital video signal according to the first switching signal or output an image processing signal according to the second switching signal.
Illustratively, the video switching component 104 outputs the digital video signal or the image processing signal to a signal processing device of the vehicle-mounted device, wherein the signal processing device of the vehicle-mounted device includes: the signal storage device and the signal display device store digital video signals or image processing signals through the signal storage device, display the digital video signals or the image processing signals through the signal display device, and after the video switching assembly 104 switches and outputs different types of video data streams, the functions of displaying or storing and the like can be performed according to the actual requirements of users, so that the multifunctional vehicle-mounted video control requirements of the users are met.
The video switching component 104 has a video data stream switching function, and the video control component 102 can control the video switching component 104 to selectively output different types of video signals; exemplarily, the image processing signal number conforms to an MIPI (mobile industry Processor Interface) signal transmission format, so that the image processing signal is compatibly transmitted under a low-amplitude signal swing amplitude, a data distribution function can be realized in a channel transmission process, and the transmission efficiency is high; the digital video signal conforms to the BT.656 signal transmission format, so that the digital video signal contains multi-frame video data, dynamic scanning of video information can be realized according to the digital video signal, synchronous and complete image information can be displayed, and the transmission process of the digital video signal has higher anti-interference performance; therefore, the digital video signal and the image processing signal have different signal transmission format requirements, and can be suitable for specific signal transmission environments and states.
Specifically, when the video control component 102 detects the plugging state of the earphone in the vehicle-mounted device, the video switching component 104 switches and conducts different signal transmission channels respectively to transmit a video data stream output by the image acquisition component 101 or a video data stream output by the video conversion component 103; when the video control component 102 outputs the first switching signal to the video switching component 104, the video switching component 104 switches and conducts a branch between the video conversion component 103 and a signal processing device of the vehicle-mounted device to output the digital video signal, and the vehicle-mounted device stores or displays a video data stream output by the earphone, so that a user can acquire the video data stream output by the earphone at any time; when the video control component 102 outputs the second switching signal to the video switching component 104, the video switching component 104 switches and conducts a branch between the image acquisition component 101 and a signal processing device of the vehicle-mounted device, and the vehicle-mounted device can store or display image information of an external environment in real time, so that the external environment where the vehicle-mounted device is located can be monitored accurately in real time, and physical safety and stability of the vehicle-mounted device are guaranteed; therefore, the present embodiment implements the switching output function between two video data streams through the video switching component 104, the operation is simple, and under the control of the video control component 102, the video switching component 104 can selectively output different types of video data streams, thereby satisfying the multifunctional video control requirement of the user.
In the structural schematic of the audio/video switching circuit 10 shown in fig. 1, the image acquisition component 101 and the video conversion component 102 are combined to compatibly transmit two different types of video data streams, so that the application range is wide, processing and conversion of different types of video data are realized, and the transmission requirement of a user on a multifunctional video data stream is met; the video control component 102 can change the signal transmission state of the video switching component 104 for the plugging and unplugging condition of the earphone on the vehicle-mounted equipment, the video switching component 104 can flexibly and adaptively switch between two paths of video data streams, when the earphone is plugged into the vehicle-mounted equipment or the earphone is not plugged into the vehicle-mounted equipment, the video switching component 104 can output digital video signals or image processing signals in real time, and the safety and reliability of the video data are guaranteed; therefore, the audio/video switching circuit 10 in this embodiment can be compatible with different types of video data streams, and can realize free switching between two different types of video data streams according to the plugging/unplugging state of the earphone, and can support transmission of different types of video data streams on the basis of not changing the hardware circuit structure, so that the operation is simple and convenient, the cost of video data stream switching control is low, different vehicle-mounted monitoring scenes of the vehicle-mounted device are met, and the data transmission safety and the efficiency of the vehicle-mounted device are improved; the problems that in the prior art, the vehicle-mounted equipment cannot compatibly transmit different types of video data streams, the signal transmission function is single, the vehicle-mounted equipment cannot be suitable for different types of signal transmission environments, the multifunctional video control requirements of users cannot be met, the transmission safety of the video data of the vehicle-mounted equipment is reduced, and the user experience is poor are effectively solved.
As an alternative implementation, fig. 2 shows a schematic structure of the video control module 102 provided in this embodiment, please refer to fig. 2, where the video control module 102 includes: a video detection part 1021 and a video encoding part 1022, wherein the video detection part 1021 is configured to generate a first level signal when headphone access is detected and generate a second level signal when headphone access is not detected.
The video detection part 1021 can detect the plugging state of the earphone in the vehicle-mounted equipment in real time, and further generate a corresponding level signal; illustratively, the first level signal is a high level signal, and the second level signal is a low level state; therefore, in the embodiment, the level state of the signal output by the video detection component 1021 represents the plugging and unplugging state of the earphone in the vehicle-mounted device, so that high-precision and sensitive detection on the plugging and unplugging state of the earphone is realized, and further switching output of different video data streams is controlled; whether the earphone is connected to the vehicle-mounted equipment or not can be accurately, simply and conveniently acquired through the video detection part 1021, the requirement for audio and video switching is met, and the controllability is high.
The video encoding part 1022 is connected to the video detection part 1021 and the video switching component 104, and is configured to generate a first switching signal according to the first level signal or generate a second switching signal according to the second level signal.
When the video detection component 1021 detects the plugging state of the earphone on the vehicle-mounted device, the video detection component 1021 outputs a first level signal or a second level signal to the video coding component 1022, and after the level state of the level signal is identified and analyzed by the video coding component 1022, a corresponding switching signal can be output, wherein the first switching signal and the second switching signal both contain corresponding switching information, and then the video coding component 1022 outputs the first switching signal or the second switching signal to the video switching component 104, so that the compatible switching of the audio/video switching circuit 10 between two different video data streams is realized, the multifunctional video switching control requirement of a user is met, and the video control component 102 has high signal conversion efficiency and accuracy.
As an alternative implementation, fig. 3 shows a schematic circuit structure of the video detection unit 1021 in this embodiment, and referring to fig. 3, the video detection unit 1021 includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1 and a first interface chip J1.
The first end of the first resistor R1 and the first end of the second resistor R2 are connected together to form a detection end of the video detection part 1021, the detection end of the video detection part 1021 is used for detecting whether an earphone is connected or not, the plugging state of the earphone on the vehicle-mounted equipment can be sensitively sensed through the detection end of the video detection part 1021, and the detection precision and the sensitivity of the plugging state of the earphone are improved; the second end of the first resistor R1, the first end of the third resistor R3, and the cathode of the first diode D1 are commonly connected to the switching detection pin of the first interface chip J1, as shown in fig. 3, the switching detection pin of the first interface chip J1 is the 1 st pin; the second end of the second resistor R2, the second end of the third resistor R3 and the anode of the first diode D1 are connected to the ground GND in common; wherein, the first diode D1 can play a voltage stabilizing role in the plugging and unplugging state detection process of the earphone.
The signal output pin of the first interface chip J1 is connected to the video encoding component 1022; as shown in fig. 3, the signal output pin of the first interface chip J1 includes: and the 3 rd pin and the 6 th pin, after the video detection part 1021 detects the plugging state of the earphone on the vehicle-mounted device, the signal output pin of the first interface chip J1 outputs a corresponding level signal to the video coding part 1022, so that the precision and efficiency of audio/video switching are ensured.
Illustratively, the signals of the first interface chip U1 are: 0.5PITICH-6PIN, which can output signals of specific level states through the first interface chip U1; illustratively, when the headset is not plugged into the vehicle-mounted device, the switching detection pin of the first interface chip J1 is at a low level, the first interface chip U1 outputs a second level signal, and then the video data stream output by the image acquisition component 101 is transmitted to the signal storage device 20 through the video switching component 104, so that the signal storage device 20 can store the image information in the external environment in real time; when the earphone is inserted into the vehicle-mounted device, the detection end of the video detection part 1021 can sense the insertion state of the earphone, the detection end of the video detection part 1021 is at a high level, the video detection part 1021 outputs a first level signal at the moment, and the video switching component 104 switches the video data stream into a digital video signal to be output, so that the normal circuit function of the vehicle-mounted device when the earphone is externally connected is ensured, and the control is simple and convenient.
As an alternative implementation, fig. 4 shows a schematic circuit structure of the video encoding part 1022 provided in this embodiment, and referring to fig. 4, the video encoding part 1022 includes: the video coding chip U1, wherein the model of video coding chip U1 is: HI3516CV 300; a level input pin GPIO of the video coding chip U1 is connected with the video detection part 1021; the switching control pin mdio of the video coding chip U1 is connected to the video switching component 104. The video coding chip U1 can recognize and convert signals with different level states to change the video data stream switching state of the video switching component 104, which is beneficial to improving the efficiency and accuracy of switching different types of video data streams of the audio/video switching circuit 10.
As an alternative embodiment, the image capturing assembly 101 comprises: an image sensor chip U2, wherein the model of the image sensor chip U2 is: IMX 291; specifically, a signal output pin of the image sensor chip is connected to the video switching module 104; furthermore, the image sensor chip can collect the image information of the external environment in real time and convert the image information into an image processing signal, so that the processing efficiency of the video data stream is improved, and the audio/video switching circuit 10 can be used for compatibly and quickly transmitting the image information of the external environment.
As an alternative embodiment, the video conversion component comprises: an analog-to-digital conversion chip; the analog-to-digital conversion chip comprises the following types: NVP 6112.
Specifically, a signal input pin of the analog-to-digital conversion chip is used for accessing the composite video signal, and a signal output pin of the analog-to-digital conversion chip is connected with the video switching component 104; when the digital-to-analog conversion chip receives the composite video signal output by the earphone, the analog-to-digital conversion chip can change the signal form of the composite video signal in real time, so that the digital video signal has better signal transmission stability and compatibility, the video switching component 104 has higher switching output precision and efficiency for different types of video data streams, and the requirement of high-efficiency video control of users is met.
As an optional implementation manner, fig. 5 shows another structural schematic of the audio/video switching circuit 10 provided in this embodiment, and compared with the structural schematic of the audio/video switching circuit 10 in fig. 1, the audio/video switching circuit 10 in fig. 5 further includes: the power conversion component 105, the power conversion component 105 is connected with the image acquisition component 101, the video control component 102, the video conversion component 103, the video switching component 104 and the power supply device 20, and is configured to convert the electric energy output by the power supply device 20 and supply power to the image acquisition component 101, the video control component 102, the video conversion component 103 and the video switching component 104.
Optionally, the power supply device 20 is a charging pile or a lithium battery; the power conversion component 105 can realize an electric energy conversion function, the audio/video switching circuit 10 can be applied to different power systems, and electric energy output by the power conversion component 105 can be used for powering up circuit modules in the audio/video switching circuit 10 according to rated power, so that the switching output efficiency and accuracy of the audio/video switching circuit 10 on different video data streams are improved; specifically, the power conversion module 105 performs voltage boosting or voltage dropping on the electric energy output by the power device 20, and obtains a first power signal, a second power signal, a third power signal, a fourth power signal, and a fifth power signal; the image acquisition assembly 101 is powered on through a first power supply signal, the video control assembly 102 is powered on through a second power supply signal, the video conversion assembly 103 is powered on through a third power supply signal, and the video switching assembly 104 is powered on through a fifth power supply signal; therefore, the power conversion component 105 has a flexible electric energy conversion function, the power supply efficiency and the power supply accuracy of the internal circuit module of the audio/video switching circuit 10 are guaranteed, the video data transmission efficiency and the transmission safety of the audio/video switching circuit 10 are improved, and the stability and the practical value are higher.
Fig. 6 shows a structural schematic diagram of the vehicle-mounted device 60 provided in the present embodiment, and referring to fig. 6, the vehicle-mounted device 60 includes: the earphone socket 601, the audio/video switching circuit 10 and the signal storage device 30 as described above, the earphone socket 601 is used for accessing an earphone, and a compatible communication function can be realized between the earphone and the earphone socket 601; illustratively, when a 3.5mm earphone is plugged into the earphone socket 601, the internal signal transmission logic state of the in-vehicle device 60 can be changed to improve the transmission efficiency and compatibility of the video data stream output by the earphone; the audio/video switching circuit 10 is connected with the earphone socket 601; the signal storage device 30 is connected with the audio/video switching circuit 10; furthermore, in the same way of inserting the earphones into the earphone socket 601, the audio switching circuit 10 can realize the switching function between two video data streams, can support the compatible transmission of video data of different types, is convenient to operate, can selectively store the video information in the external environment and the video information output by the earphones through the signal storage device 30, improves the compatibility and reliability of the video information of the vehicle-mounted device 60, meets the complex application scene requirements of users, and has higher practical value.
Illustratively, the in-vehicle device 60 includes at least any one of an in-vehicle digital video recorder and an in-vehicle automobile drive recorder; in the embodiment, the audio/video switching circuit 10 is applied to the vehicle-mounted digital video recorder and the vehicle-mounted automobile running recorder, so that the data transmission compatibility and stability of the vehicle-mounted digital video recorder and the vehicle-mounted automobile running recorder can be guaranteed, the monitoring safety of the vehicle can be more comprehensively guaranteed through the video data stored in the vehicle-mounted digital video recorder and the vehicle-mounted automobile running recorder, and the cost of the video data compatible transmission is reduced.
Referring to the embodiments of fig. 1 to 5, the audio/video switching circuit 10 implements a switching function between different types of video data streams according to a plugging function of an earphone, the vehicle-mounted device 60 can support transmission of different types of video data streams, the transmission compatibility and stability of video data are higher, the circuit structure of the audio/video switching circuit 10 is simplified, the switching control cost of different types of video data streams is reduced, and good use experience is brought to a user; therefore, the problems that in the prior art, the vehicle-mounted equipment is only suitable for the transmission function of one type of video data stream, the multifunctional video data transmission requirement of a user cannot be met, and the compatibility of video data is low are effectively solved.
Fig. 7 shows a structural schematic diagram of a vehicle 70 provided in the present embodiment, and referring to fig. 7, the vehicle 70 includes: the vehicle-mounted device 60 and the power interface 701 are as described above, wherein the power interface 701 is connected with the vehicle-mounted device 60, and the power interface 701 is used for transmitting the power supply electric energy output by the power adapter to the vehicle-mounted device 60 when the power adapter is connected; the power adapter stores electric energy, the electric energy stored by the power adapter is transmitted through the power interface 701 to supply power to the vehicle-mounted device 60, the electric energy continuity and safety of the vehicle-mounted device 60 are guaranteed, and the vehicle 70 is compatibly connected with external electric energy to keep the vehicle-mounted video data of the vehicle-mounted device safe and reliable.
Referring to the embodiment of fig. 6, in the present embodiment, the vehicle-mounted device 60 is applied to the vehicle 70, the vehicle-mounted device 60 can store video data, and the vehicle-mounted device 60 can transmit different types of video data streams in a compatible manner, so that the safety and efficiency of transmission and storage of the internal video data of the vehicle-mounted device 60 are improved, and further, the driving safety and physical stability of the vehicle 70 can be monitored in an all-around manner according to the video data stored by the vehicle-mounted device 60, so that the vehicle 70 can be universally applied to different driving environments, and the user experience and the emergency monitoring capability are improved; the problems that in the prior art, the video data monitoring compatibility and the safety of the vehicle are low, the safety monitoring requirement of a user cannot be met, great inconvenience is brought to the vehicle video monitoring process of the user, and the use experience of the user is poor are effectively solved.
Various embodiments are described herein for various devices, circuits, apparatuses, systems, and/or methods. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.
Reference throughout the specification to "various embodiments," "in an embodiment," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with features, structures, or characteristics of one or more other embodiments without presuming that such combination is not an illogical or functional limitation. Any directional references (e.g., plus, minus, upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above …, below …, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to aid the reader's understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of the embodiments.
Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. The use of "for example" throughout this specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the disclosure, and the disclosure is not limited to such examples. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the disclosure.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. An audio and video switching circuit applied to vehicle-mounted equipment is characterized by comprising:
the image acquisition assembly is configured to acquire image information of a preset area and generate an image processing signal;
configured to detect whether to access a headset, and when detecting that the headset is accessed, generating a first switching signal; when the earphone is not detected to be accessed, the video control component generates a second switching signal;
a video conversion component configured to receive a composite video signal output by the headset and convert the composite video signal into a digital video signal when the headset is accessed; and
and the video switching component is connected with the image acquisition component, the video conversion component and the video control component and is configured to output the digital video signal according to the first switching signal or output the image processing signal according to the second switching signal.
2. The audio-video switching circuit of claim 1, wherein the video control component comprises:
a video detection part configured to generate a first level signal when the earphone is detected to be accessed, and generate a second level signal when the earphone is not detected to be accessed; and
and a video encoding unit connected to the video detection unit and the video switching module, and configured to generate the first switching signal according to the first level signal or generate the second switching signal according to the second level signal.
3. The audio-video switching circuit according to claim 2, wherein the video detection means comprises:
the circuit comprises a first resistor, a second resistor, a third resistor, a first diode and a first interface chip;
a first end of the first resistor and a first end of the second resistor are connected in common to form a detection end of the video detection component, the detection end of the video detection component is used for detecting whether the earphone is connected or not, a second end of the first resistor, a first end of the third resistor and a cathode of the first diode are connected in common to a switching detection pin of the first interface chip, and a second end of the second resistor, a second end of the third resistor and an anode of the first diode are connected in common to the ground;
and the signal output pin of the first interface chip is connected with the video coding component.
4. The audio-video switching circuit according to claim 2, wherein the video encoding means includes: the video coding chip, wherein the model of video coding chip is: HI3516CV 300;
the level input pin of the video coding chip is connected with the video detection component;
and a switching control pin of the video coding chip is connected with the video switching component.
5. The audio-video switching circuit of claim 1, wherein the image capture assembly comprises: an image sensor chip, wherein the model of the image sensor chip is: IMX 291.
6. The audio-video switching circuit of claim 1, wherein the video conversion component comprises: an analog-to-digital conversion chip; the type of the analog-to-digital conversion chip is as follows: NVP 6112.
7. The audio-video switching circuit of claim 1, further comprising:
the power supply conversion assembly is connected with the image acquisition assembly, the video control assembly, the video conversion assembly, the video switching assembly and the power supply device, is configured to convert electric energy output by the power supply device and supplies power to the image acquisition assembly, the video control assembly, the video conversion assembly and the video switching assembly.
8. An in-vehicle apparatus, characterized by comprising:
an earphone socket for connecting the earphone;
an audiovisual switching circuit as in any of claims 1-7, connected to the headset jack; and
and the signal storage equipment is connected with the audio and video switching circuit.
9. The in-vehicle apparatus according to claim 8, wherein the in-vehicle apparatus includes at least any one of an in-vehicle digital video recorder and an in-vehicle automobile drive recorder.
10. A vehicle, characterized by comprising:
the vehicle-mounted device according to claim 8; and
and the power interface is connected with the vehicle-mounted equipment and used for transmitting the power supply electric energy output by the power adapter to the vehicle-mounted equipment when the power adapter is accessed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921842724.5U CN210745355U (en) | 2019-10-30 | 2019-10-30 | Audio and video switching circuit applied to vehicle-mounted equipment, vehicle-mounted equipment and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921842724.5U CN210745355U (en) | 2019-10-30 | 2019-10-30 | Audio and video switching circuit applied to vehicle-mounted equipment, vehicle-mounted equipment and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210745355U true CN210745355U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921842724.5U Active CN210745355U (en) | 2019-10-30 | 2019-10-30 | Audio and video switching circuit applied to vehicle-mounted equipment, vehicle-mounted equipment and vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN210745355U (en) |
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- 2019-10-30 CN CN201921842724.5U patent/CN210745355U/en active Active
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