In general, the main criteria for evaluating the merits of a vehicle-mounted DVR (MVR/MDR) system are stability, shock resistance, heat resistance, and miniaturization.
Vx-Works real-time operating systems are commonly used in on-board systems. It is designed for embedded systems and has a wide range of industrial and military applications, including Mars surface landing Mars controller. Unlike Windows and Linux systems, the stability of Windows systems has always been questioned. It occupies large system resources and is vulnerable to attacks. Linux systems are free software without special maintenance. In the CPU selection, the application of communication-level Freescale's Power PC, this CPU supports multi-task parallel processing. This CPU is widely used in industrial, communications and military fields. The world's first hardware-only audio/video synchronization MPEG4 compression/decompression chip VWeb2010 is adopted on the decoder chip, which is different from the compression algorithm + DSP chip on the market. This processing mode can provide high-definition DVD picture quality and support from CIF to D1 video format to ensure real-time synchronization of audio and video.
Through the above technical foundation, a stable platform for on-board DVRs is constructed to realize recording and recording of live images of automobiles (road signs, pedestrian conditions of vehicles) or internal live images (staff crew, passenger status) while the vehicle is in motion; providing a variety of convenient queries and playback In the mode, you can view and play back recorded scene images, and realize high-speed backup of recording data through the USB2.0 interface. In the system power supply link, taking into account the complexity of various types of vehicle-mounted environment power, usually two sets of voltage segments of 9-40VDC and 40-80VDC are adopted to meet various types of mobile vehicles. The management of power supply fully considers vehicle startup and driving. The process of voltage fluctuations, electromagnetic interference and other issues, to ensure the reliability and stability of the system when running.
The basic components that make up a digital vehicle surveillance system are: onboard hard disk recorders, cameras, monitors, and transmission lines. The camera is responsible for obtaining the video signal in the cabin and transmitting the image signal to the on-board DVR through the video coaxial cable. The DVR compresses the video signal and stores it on the hard disk according to the set compression format. At the same time, the DVR can also output each video signal to the monitor according to the user-selected combination.
Depending on the model chosen by the user, the functionality of the onboard DVR varies. Car DVRs should have the following basic functions:
1. Professional power supply design to meet the automotive power supply voltage fluctuations and a large electric pulse impact of the working environment.
2. Professional hard disk shock-absorbing design, lockable, removable, provide convenient data backup.
3. With an embedded operating system, it is stable and hard to freeze, and calls are quickly started.
4. Support multi-channel audio and video input real-time monitoring and recording.
5. Multiple modes of video recording (manual, timing, alarm linkage, dynamic detection) and quick query playback.
6. With video loss and dynamic alarm detection.
7. Three-level user management mode, safe and reliable, high density.
8. Supports large capacity HDDs without formatting, plug and play.
In addition to the above basic functions, the on-vehicle DVRs should also have powerful function expansion capabilities, and be able to provide different extension functions according to the needs of users. Depending on the model chosen by the user, the extended features supported by our products are:
The black brake function of the vehicle is used to record the driving process of the vehicle; GPS global positioning system and electronic map navigation function.
Real-time, two-way information wireless broadband transmission capabilities to achieve remote real-time monitoring and scheduling management; car entertainment features, video and audio data playback capabilities, can be used to play ads, entertainment programs in the car.
Let us first compare the processing and recording equipment of the three mainstream video signals of the on-board DVR in the market:
All video signals are input to the onboard DVR for processing. Depending on the type of hard disk recorder chosen by the user, the system supports different video compression formats. Currently, the main video image compression formats on the market are: M-JPEG (Motion JPEG), MPEG1, MPEG2, and MPEG4.
The functions supported by the DVR include: compressing and recording video images as video files, randomly searching video files, previewing video files, and backing up video files. (When previewing files, supporting fast-forward and fast-rewinding of images) Black box function, PTZ Control function, alarm function, another function expansion (entertainment program broadcast, advertisement play, etc.).
Vx-Works real-time operating systems are commonly used in on-board systems. It is designed for embedded systems and has a wide range of industrial and military applications, including Mars surface landing Mars controller. Unlike Windows and Linux systems, the stability of Windows systems has always been questioned. It occupies large system resources and is vulnerable to attacks. Linux systems are free software without special maintenance. In the CPU selection, the application of communication-level Freescale's Power PC, this CPU supports multi-task parallel processing. This CPU is widely used in industrial, communications and military fields. The world's first hardware-only audio/video synchronization MPEG4 compression/decompression chip VWeb2010 is adopted on the decoder chip, which is different from the compression algorithm + DSP chip on the market. This processing mode can provide high-definition DVD picture quality and support from CIF to D1 video format to ensure real-time synchronization of audio and video.
Through the above technical foundation, a stable platform for on-board DVRs is constructed to realize recording and recording of live images of automobiles (road signs, pedestrian conditions of vehicles) or internal live images (staff crew, passenger status) while the vehicle is in motion; providing a variety of convenient queries and playback In the mode, you can view and play back recorded scene images, and realize high-speed backup of recording data through the USB2.0 interface. In the system power supply link, taking into account the complexity of various types of vehicle-mounted environment power, usually two sets of voltage segments of 9-40VDC and 40-80VDC are adopted to meet various types of mobile vehicles. The management of power supply fully considers vehicle startup and driving. The process of voltage fluctuations, electromagnetic interference and other issues, to ensure the reliability and stability of the system when running.
The basic components that make up a digital vehicle surveillance system are: onboard hard disk recorders, cameras, monitors, and transmission lines. The camera is responsible for obtaining the video signal in the cabin and transmitting the image signal to the on-board DVR through the video coaxial cable. The DVR compresses the video signal and stores it on the hard disk according to the set compression format. At the same time, the DVR can also output each video signal to the monitor according to the user-selected combination.
Depending on the model chosen by the user, the functionality of the onboard DVR varies. Car DVRs should have the following basic functions:
1. Professional power supply design to meet the automotive power supply voltage fluctuations and a large electric pulse impact of the working environment.
2. Professional hard disk shock-absorbing design, lockable, removable, provide convenient data backup.
3. With an embedded operating system, it is stable and hard to freeze, and calls are quickly started.
4. Support multi-channel audio and video input real-time monitoring and recording.
5. Multiple modes of video recording (manual, timing, alarm linkage, dynamic detection) and quick query playback.
6. With video loss and dynamic alarm detection.
7. Three-level user management mode, safe and reliable, high density.
8. Supports large capacity HDDs without formatting, plug and play.
In addition to the above basic functions, the on-vehicle DVRs should also have powerful function expansion capabilities, and be able to provide different extension functions according to the needs of users. Depending on the model chosen by the user, the extended features supported by our products are:
The black brake function of the vehicle is used to record the driving process of the vehicle; GPS global positioning system and electronic map navigation function.
Real-time, two-way information wireless broadband transmission capabilities to achieve remote real-time monitoring and scheduling management; car entertainment features, video and audio data playback capabilities, can be used to play ads, entertainment programs in the car.
Let us first compare the processing and recording equipment of the three mainstream video signals of the on-board DVR in the market:
All video signals are input to the onboard DVR for processing. Depending on the type of hard disk recorder chosen by the user, the system supports different video compression formats. Currently, the main video image compression formats on the market are: M-JPEG (Motion JPEG), MPEG1, MPEG2, and MPEG4.
The functions supported by the DVR include: compressing and recording video images as video files, randomly searching video files, previewing video files, and backing up video files. (When previewing files, supporting fast-forward and fast-rewinding of images) Black box function, PTZ Control function, alarm function, another function expansion (entertainment program broadcast, advertisement play, etc.).
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