Hard disk Recorder (Digital
Video Recorder, referred to as DVR), that is, digital video recorder, compared with the traditional analog video recorder, using hard disk recording, it is often called hard disk recorder, also known as DVR.
It is a set of image storage and processing computer system, with the image/voice for a long time video recording, recording, remote monitoring and control functions. DVR uses digital recording technology, in image processing, image storage, retrieval, backup, and network transmission, remote control and other aspects are also far superior to analog monitoring equipment, DVR represents the development direction of TV monitoring system, is the market TV monitoring system of choice products.
The main functions of DVR include: monitoring function, recording function, playback function, alarm function, control function, network function, password authorization function and work schedule function. The following features are also included:
Video storage
All hard disk recorders can be connected to the serial port hard disk, users can choose different sizes of hard disk connection according to their own video storage time.
Video viewing
Hard disk video recorder with BNC, VGA video output, can be used with TV, monitor, computer monitor and other display equipment. Some manufacturers also integrate the display screen with the hard disk video recorder.
Video viewing is divided into real-time video viewing and video playback.
Video management
All DVR manufacturers are equipped with centralized management software, which can be used to manage video images of multiple hard disk recorders and unified video storage functions.
Remote access
Hard disk video recorder through the network setting, can achieve remote access, mobile phone access. Let the monitoring in the case of a network, to achieve anytime and anywhere view.
The outstanding characteristics of hard disk video recorder are reflected in the following aspects:
1. The realization of digital high-fidelity storage of analog programs can record and store analog audio and video programs that are widely disseminated and collected by individuals in advanced digital ways. Recording once and playing repeatedly will not cause any decline in quality.
2. Comprehensive input and output interfaces provide antenna/TV cable, AV terminal, S terminal input interface and AV terminal, S terminal output interface. Can record almost all TV programs and other players, camera output signals, easy to connect with other audio-visual equipment.
3. Multiple optional image recording levels for the same program source, provides three image quality recording levels: high, medium and low. When the highest grade is selected, the image quality is close to that of DVD.
4. Large-capacity long-term program storage, strong scalability users can choose 20.4GB, 40GB or larger capacity hard disk for program storage. With a capacity of 20.4GB, the relationship of recording time at the selected bit rate is shown in the following table:
Bit rate (Mbps) Recorded program time (hours) 6 7 4 10 2 20 1.15 38
5. With advanced Timeshifting function When the user has to interrupt watching TV programs, just press the Timeshifting key, and the programs from the interrupted time will be automatically saved, and the user can continue to watch the programs from the interrupted position after handling the business, without any sense of pause.
6. Perfect reservation recording/play program function. Users can freely set the starting time and length of time to start recording/playing programs. Through the editing of the schedule, various intermittent television programs, including TV series, can be systematically recorded.
7. Powerful network information Home appliance center users through the network communication interface, the use of DVR customized web browser, equipped with the corresponding network resources, will be able to enjoy a wealth of network online information.
8. Provide a convenient way to manage recorded programs Users can organize and classify recorded programs according to recording time, program types, etc., and set bookmarks at their favorite locations.
9. Provide any way to play because of the fast and random storage characteristics of the hard disk, you can enjoy the recorded and recording programs in more ways than the current DVD player, more flexible stunts can be played, the image is smoother when playing fast, and the detail resolution is higher when playing slow.
