Power connector
The type of connector used in the recorder to power it. First of all, you should pay attention to this item if you plan to change the registrar with ready-made wiring for one or another type of connector (
miniUSB,
microUSB,
USB-C,
DC 12V). Thus, the replacement of the registrar rests simply on installing a new one without re-changing the cable.
Screen type
The sensor is a key element of any digital camera; it is from it and from signal processing technologies that the quality of the resulting image primarily depends. In this case, the type refers rather to the brand or brand of the matrix; it is usually indicated if the recorder is equipped with a high-quality sensor that is noticeably superior to most solutions on the market.
One of the most popular such options is
Sony. The specific characteristics of the matrices (
IMX179,
IMX222,
IMX291,
IMX307,
IMX317,
IMX322,
IMX323,
IMX326,
IMX335,
IMX415) may vary, but anyway, such a sensor is a sign of a high-end DVR.
In addition, there are models equipped with matrices from other manufacturers —
Aptina,
OmniVision,
Samsung(GalaxyCore),
Sandvik. Such solutions are generally considered to be simpler and more democratic than Sony — both in terms of price and functionality. Nevertheless, Samsung has a lot of developments in the field of electronics, and even such r
...elatively “simple” sensors are usually more advanced and of higher quality than “know-names”.
Another manufacturer that produces fairly high-quality matrices is Panasonic. Such sensors are not as widespread as those described above, but they are still found in video recorders, including pretty advanced.Processor
Model of the processor used in the dashcam
The term "video chip" is used mainly for devices with classic capabilities, "processor" — for advanced models with an abundance of non-standard functions. However, anyway, we are talking about the same component — the main computing unit, the characteristics of which directly affect the capabilities of the recorder as a whole. Knowing the model of the processor, you can find detailed data on it and evaluate how satisfied you are with a device based on such electronics. Of the most advanced modern chips, one can name, in particular,
Ambarella A7L,
Ambarella A12,
Novatek NTK96655,
Novatek NTK96660 and
HiSilicon Hi3516.
Field of view
The viewing angle provided by the main camera of the DVR. As a rule, it is indicated along the diagonal of the frame, less often - horizontally, because of this, models with the same numbers in the characteristics may differ somewhat in the actual field of view. So if you have doubts about this, when choosing, it does not hurt to find and watch video samples from different models.
Other things being equal, a wider viewing angle allows you to cover more space, but individual details in the frame are smaller. In addition, wide-angle lenses give geometric distortions of the image (however, DEWARP can be provided to eliminate them, see "Functions"). As for specific figures, viewing angles
up to 120° inclusive are considered relatively small for modern registrars, values of
121 - 140 ° can be called average,
141 - 160 ° are above average, and the most wide-angle models are able to cover a space
of more than 160 °.
Navigation
—
Speed on video. The ability to display data on the current speed of the car on the video being shot - usually in the form of numbers in one of the corners of the frame. As a rule, the device receives speed information from the built-in GPS sensor (see below). This function can be especially useful when analyzing ambiguous situations - for example, as additional evidence that the driver did not violate the speed limit.
—
GPS module. Built-in GPS satellite navigation module, which allows you to determine the current coordinates of the device. The specific ways in which this information can be used may vary depending on the other functionality of the registrar. Thus, it is data from GPS that is used to display speed on video (see above), as well as for the operation of the GPS informer and
GPS navigator described below. There are other options, sometimes quite original - for example, if you have
a 3G/4G modem, a beacon mode may be provided (
GPS tracker - see below).
—
GPS informant. A function that provides the driver with various useful information related to the current location. As the name suggests, the location itself is determined using GPS. One of the most popular ways to use an informant is to warn of approaching traffic cameras, stationary post
...s and speed control systems that are not detected by a traditional radar detector. In addition, other similar functions may be provided - for example, a message about an area with a high accident rate or a separate large hole on the road. To operate the GPS informer, a database of relevant objects is entered into the device’s memory; When purchasing, it doesn’t hurt to clarify what exactly this database contains, how fresh it is, and whether it allows for updating and manually adding points.
— GPS navigator. The device can operate as a full-fledged GPS navigator. For this, in addition to the GPS module itself, the design provides built-in maps, as well as a fairly large display to display them. This allows you to do without purchasing and using a separate navigator, but this function is not particularly popular in modern DVRs. Firstly, it significantly affects the cost of the device; secondly, a regular smartphone or tablet with GPS is often enough to navigate on public roads; thirdly, recorders most often have rather modest navigation capabilities and are often inferior even to smartphones/tablets, not to mention specialized devices.
— GPS tracker. Another function found in recorders with a GPS module (see above). A GPS tracker allows the device to operate in beacon mode, constantly transmitting data about the location of the car to one or another recipient - for example, taxi service dispatchers, the customer of cargo transportation, etc. Such beacons are also sold as separate devices, but it is easier (and sometimes cheaper) to buy and install a recorder with this function. In any case, it is worth considering that a 3G/4G modem is usually used to transfer data (see below) - so to use the tracker you will have to buy a SIM card and regularly pay for mobile communications.
— GLONASS. The device supports the GLONASS navigation system, the Russian analogue of the GPS described above. Most often, this function is provided in addition to the GPS module: simultaneous use of two systems improves the speed and accuracy of positioning, and also provides an additional guarantee in case of failures in one of them.
—Galileo. European satellite navigation system, created as an alternative to American GPS. Note that it is under the control of civilian departments, not the military. With a full fleet of 24 active satellites, the system provides an accuracy of up to 1 m in public mode and up to 20 cm with the GHA service. Working in conjunction with GPS, Galileo provides more accurate position measurements, especially in densely populated areas.Screen size
The diagonal of the display installed in the DVR.
A large display, on the one hand, provides additional convenience, on the other hand, it affects the dimensions and price of the entire device. Therefore, manufacturers choose a diagonal in such a way that the device can be used normally and at the same time it is not too expensive and bulky. So, for a classic registrar that does not have additional functions, a small display is enough —
2 – 2.5",
1.5 – 2", or even
less : it completely allows you to manage the settings and control what exactly gets into the frame, and to fully view the footage, you still need a computer, TV or other large screen. A size of
2.5 – 3 " by the standards of such devices can already be called average, and screens of
3" or more are typical mainly for fairly advanced models, often with an abundance of additional functions.
Also note that there are models that
do not have a display at all. To control the operation parameters and check the position of the frame, such a recorder is connected to an external device — for example, to a smartphone via Wi-Fi.
Screen resolution
Resolution of the display installed in the recorder.
The higher the resolution (with the same diagonal) — the clearer the image is, but the more expensive the screen itself. At the same time, high resolutions are not needed to set the camera in the desired position and to work with the basic settings of the device. So you should pay attention to this parameter only if you plan to use additional functions that require a high-quality “picture” — for example, a GPS navigator (see “Functions”) or a remote camera that plays the role of a reversing camera.
Max. memory card size
The largest size of the memory card allowed for the device. This limitation is primarily due to the fact that more powerful hardware is required to work with larger volumes. In addition, there are nuances associated with individual subspecies of cards. Anyway, this value cannot be exceeded: with a high probability, the registrar will either work incorrectly, or will not be able to work at all, or even completely fail.
Most modern registrars support cards
up to 32 GB or
64 GB, but there are models that are compatible with more capacious cards —
128 GB or even
256 GB.
Battery capacity
The capacity of the device's own battery (see "Power source").
The general purpose of the battery depends primarily on this indicator. If the recorder uses a relatively modest battery, up to 500 mAh, this most often means that it plays the role of a backup power supply in case of disconnection from the cigarette lighter (for example, in an accident when the on-board mains fails). In such cases, you can not pay special attention to the capacity - it is usually guaranteed to last at least a few minutes of autonomous recording, and for continuous operation, the device will still have to be connected to the cigarette lighter. But for full (not "spare") power, much more capacious batteries are required - at least 800 mAh, and ideally 1000 mAh and higher. The exception is ultra-compact motorcycle models that do not have screens and do not consume much energy - for them, 200 mAh or even less is sometimes enough.
It should be noted that, theoretically, a more capacious battery allows the device to work longer without recharging. However, in practice, comparing different models by this indicator essentially makes no sense: after all, the autonomy of the recorder also depends on its energy consumption, and it is determined by a number of characteristics. Moreover, manufacturers sometimes select batteries of different capacities for different models precisely with the calculation to achieve more or less the same operating time on a charge.