Comparative evaluation of 9 driving recorders: 6 resolutions such as Hikvision, Philips and Ren E are not up to standard?

Driving recorder is almost essential for driving. On the one hand, it can prevent touching porcelain or traffic disputes, leaving first-hand video evidence, on the other hand, it can record the beautiful scenery on the road.

"140-degree wide angle", "1080P high-definition picture" and "6-layer high-definition lens" are often advertised by manufacturers, so how do we choose 1 driving recorder? Which driving recorder has good picture quality? Low radiation?

In June, 2020, Consumer Report purchased 9 kinds of driving recorders from the market, including 360, Hikvision, Xiaomi, Ling Du, Philips, Man-to-Man, Jiedu, PAPAGO, Ren E, and sent them to a third-party authoritative testing agency for testing, and compared their shooting effects.

Objective indicators: visual resolution, radiation disturbance field strength.

Subjective indicators: scene quality score with good light, scene quality score with poor light, and driving video score.

1, recommend 360, PAPAGO. The CCR score of 360 G300 is 8.5, with excellent image quality and the highest measured resolution. The shape of 360G300 is different from other driving recorders, and it can be directly attached to the glass. The CCR score of PAPAGO N29 1 is 8.4, and the subjective experience and field shooting are excellent. Many volunteers think the picture quality is pleasing to the eye and clear.

2. Online banking and Philips are not recommended. T8 of Ren 'e Line is a rearview mirror driving recorder. When it is used, the rearview mirror needs to be removed, and the interface is a cigarette lighter interface, and the pictures taken are gray. Philips ADR800sp scored at the bottom, with the lowest visual resolution detection result, poor image quality, blue picture and large color difference.

The picture of driving recorder is more concerned by consumers. If the picture is not clear enough, the purpose of recording and sharing will not be achieved.

In the product pages and publicity pages of driving recorders, there are common resolution terms or titles such as "1080P high-definition image quality", "1296P ultra-clear camera", "1440P high-definition", but can this title really represent image quality?

It is worth mentioning that the nominal 1080P means that the resolution is 1920 1080, which means that the horizontal resolution is 1920 and the vertical resolution is 1080. Similarly, 1296P represents the resolution of 2340 1296, and 1440P represents the resolution of 2560 1440.

At present, there is no corresponding exclusive national standard to limit or require the image quality of driving recorder. The full name of the driving recorder in the national standard is GB/T 19056-20 12 "Automobile Driving Recorder". The national standard requires the safety and basic functions of the driving recorder, but there is no requirement for the image quality that most affects the experience and is often promoted by manufacturers.

You can refer to YD/T 1607-20 16 "Technical Requirements and Test Methods for Image and Video Transmission Characteristics of Mobile Terminals" to test the resolution of the driving recorder.

The nominal values and corresponding limits of the nine driving recorders are as follows:

According to YD/T 1607-20 16 "Technical Requirements and Test Methods for Image and Video Transmission Characteristics of Mobile Terminals", the horizontal and vertical visual resolution of the central field of view of a camera with a nominal total number of pixels less than 20 million should not be less than 65% of the theoretical limit of image high resolution.

That is to say, the nominal resolution 1080P stands for 1920 1080, and the horizontal and vertical visual resolution of the actual survey center field of view should not be lower than 1248 702.

So, can the test results be achieved?

Six models of Hikvision and Philips are suspected of "virtual standard", and consumers can't fully trust the "1080P" pixel nominal of the merchant.

The results show that six driving recorders, such as Biaopai, Jiedu, Ling Du, Ren E Hang, Hikvision and Philips, have failed to reach 65% of the nominal resolution, or are suspected of being "fake"!

Among them, 360, Xiaomi and PAPAGO have higher visual resolution, while Philips has the most general definition.

For example, Hikville's visual standard is "1080P", and the visual resolution should be no less than 1248 702, and the measured value is 1000 700, which can't reach the marked resolution!

Therefore, it is not the higher the nominal image quality of the driving recorder, the better the image quality. Taking the test results as an example, the visual resolution of the staring mini2s with nominal support of 1440P pixels is not as clear as that of the 360 G300 with nominal support of 1080P.

Therefore, when purchasing a driving recorder, consumers can't believe all the terms declared by the manufacturer, such as "1080p" and "1440p".

Consumers are not optimistic about the "virtual standard" problem of the resolution of six driving recorders.

The engineer in charge of this test told us that the name of the manufacturer may refer to hardware and software, but in the eyes of consumers, it refers to the final image. The industry threshold of driving recorder is low, the constraint is weak, and the situation of false standard is serious. In the early years, there were similar "fake labels" on mobile phones. With the development, the situation of false labels has decreased.

For the manufacturer, the nominal 1080P is a parameter derived from hardware, which refers to the resolution of the photosensitive element of the driving recorder, namely CMOS, and the pixel refers to the physical unit that can be independently photosensitive on the electronic image sensor. The final effect of the video picture is related to the lens quality, the area of CMOS, signal processing and so on. So the unclear imaging may be related to the quality of the lens or CMOS.

In other words, the manufacturer's nominal refers to hardware, such as CMOS, and consumers think it is the final shooting effect, so the manufacturer's nominal and consumer's cognition are misplaced.

It is not only a driving recorder, but also a similar situation in the fields of mobile power supply, U disk, hard disk and network speed. The nominal "10000mAh" mobile power supply refers to the internal battery capacity, but consumers think it is the final output capacity. The nominal 128G hard disk is not used that much.

This print will inform all enterprises of the test results, but no reply has been received as of press time.

Radiation disturbance field strength is one of the important indexes to measure the quality of driving recorder. The functions of driving recorder are more and more abundant, and a large number of components, chips and integrated circuits are used in it. If the product is not designed properly, it may cause electromagnetic interference to other vehicle-mounted electronic equipment, affect the normal work of other equipment, and may also cause certain harm to human body.

Nine kinds of driving recorders were sent to the third-party authoritative testing institutions, and the radiated disturbance field strength of the samples was tested according to GB 34660-20 17 "Electromagnetic Compatibility Requirements and Test Methods for Road Vehicles".

The results show that the radiation disturbance of nine driving recorders meets the standard, and consumers can use them with confidence.

In addition to clarity, consumers also need to pay attention to other parameters of driving recorder image quality: field of view angle, distortion, tolerance and so on.

If the driving recorder is not clear enough and the picture is seriously distorted, the purpose of recording and sharing will not be achieved. If the viewing angle is not wide enough to capture more vehicles and pedestrians, there may be some omissions. If the brightness of the picture is too dark, the license plate will even be unclear ... Therefore, the image quality is an important parameter to measure the performance of 1 driving recorder.

The picture is not clear and the picture quality is good. After all, you need to actually speak with experience.

In this evaluation, the image quality of nine driving recorders was compared by shooting three scenes of good light, dark light and driving video, and compared and scored according to clarity, field of view, distortion, tolerance, color reproduction, noise, anti-shake and frame rate.

The results show that PAPAGO has the best experience and good image quality. E-ray rearview mirror driving recorder is not recommended, the experience is average and the picture quality is blurred.

The specific analysis is as follows:

(1) Scenes with good light

In the case of roads with strong daylight during the day, the pictures taken by nine driving recorders have different performances, such as small field of view angles such as marking and sharpness, but shallow distortion, and the linear changes on the road are not obvious, while the pictures taken by three driving recorders, such as Ren Ehang, Jiedu and Philips, are seriously deformed, and the straight lines on the road become curves.

In addition, in this case of severe light contrast, the buildings in the upper right corner of four driving recorders, such as Ling Du, Papago, Leinei Line and Jiedu, have disappeared, and the tolerance is poor.

In addition, driving recorders all use wide-angle cameras, which claim that the viewing angle is between 90 ~ 150, but the distortion effect of wide-angle cameras is generally obvious.

(2) Dark scene

In addition to good road lighting during the day, our vehicles need to be used in dark places, such as underground parking lots, so the quality of driving recorders in dark conditions can not be ignored.

The results show that in the case of shooting the license plate number of vehicles 3 meters away in the underground parking lot, three of the nine driving recorders, such as PAPAGO, Jiedu and Gaze, can clearly see the license plate number, while the license plate numbers of three such driving recorders, such as Philips, Ren Ehang and Ling Du, are blurred in the field of vision.

(3) Driving video

In the actual use process, the vehicle is moving, so this magazine installed a driving recorder on the vehicle to take dynamic pictures and analyze the pictures.

The results show that the pictures taken by PAPAGO driving recorder are clear and stable, and can be shared as travel notes, while the pictures taken by Philips are blue and those taken by Ren E line are gray.

The full name of driving recorder in national standard is "automobile driving recorder". At present, there are three main models of driving recorder: card machine model, rearview mirror model and screenless model.

It is worth mentioning that of the nine driving recorders, only Hikvision and Gaze have no screen, so they can't view the picture in real time.

, Jiedu and Ren E lines are rearview mirror models. When using them, you need to remove the rearview mirror and have streaming media function. A camera can be installed at the rear of the car to replace the rearview mirror function, which may not be very suitable for some consumers. In addition, these three rearview mirror driving recorders can only use the cigarette lighter interface, which may occupy the interface on the car, resulting in the inability to charge the mobile phone and poor experience, while the other six driving recorders are equipped with USB interface data lines.

In addition to the image quality, the driving recorder usually has a variety of functions to deal with various situations encountered in daily driving, such as circular video recording, emergency video recording, playback, recording, electronic dog and so on. , consumers can buy on demand.

1. Be wary of publicity such as 1080p and full HD when purchasing a driving recorder. The higher the nominal value does not mean that the picture is clearer.

2. The field of view can be selected from about 120 to 140. If the field of vision is too wide, the picture may be seriously deformed.

3. Choosing a driving recorder with good image quality can not only record more clearly and ensure the validity of the evidence, but also be used to make travel notes or Vlog and share the happiness of traveling with friends.