data network, almost all devices are facing the demand for intelligent transformation. At present, the whole country has achieved large-scale 4G coverage. As a necessary device for law enforcement records, should law enforcement recorder also keep pace with the times? Hynutta DSJ-HYTH7A1 is an intelligent law enforcement recorder.
Styling: Different camera
HEINT DSJ-HYTH7A1 is a law enforcement recorder with cellular data transmission function. In layman's terms, it is possible to use SIM cards to realize data communication. This product is the larger of the law enforcement instruments we have tested, because the rotatable camera, removable large-capacity battery, and a large 2.8-inch touch screen all take up more volume and space.
rotatable camera
HEINT DSJ-HYTH7A1's camera is no longer fixed, but is located at the top of the machine and can be flipped 216 degrees. This provides law enforcement officers with a lot of flexibility in recording the real situation on the spot. For diverse scenarios, such as overpasses, tunnels, streets, etc., the lens angle can be flexibly adjusted to capture the best picture, and stored as evidence.
side buttons
Hynenda DSJ-HYTH7A1 has one more sliding switch
2.8-inch LCD screen
Hynenda DSJ-HYTH7A1 side buttons are different from those of the past products in that there is an additional switch that can be toggled up and down. This switch is used to turn on the video recording function, and there is a clear voice prompt when it is turned on and off. This physical switch also has a strong locking function, which can prevent the accidental abortion of recording due to incorrect touch. The 2.8-inch large-area LCD screen on the body adopts a full touch screen design, which is very large in size and is basically the same as a mobile phone.
Video: clearer and more cost-effective
For video shooting, it is not just the number of resolution that determines the clarity, but also depends on the compression rate. Hynut DSJ-HYTH7A1 takes into account the storage space problems caused by excessive video size. So what's the solution? It is to use the new compression algorithm. The traditional Mpeg algorithm videos are relatively large.
The algorithm of H.265 is more advanced
H.265 compressed video volume is generally only 50% of the H.264 algorithm
HEINT DSJ-HYTH7A1 uses the latest H.265 video compression algorithm. With the consistent clarity, the volume of the video can be compressed to about half of the original. For law enforcement recorders, smaller videos actually have dual meanings. They not only save space in law enforcement instruments, but also have other uses. Please continue to read. At the same time, the device adopts the dual-code stream solution, which can realize real-time video return and record while transmitting.
Wireless video transmission : Is it a mobile phone?
Open the physical lock of the battery compartment on the back of the Hytera DSJ-HYTH7A1, and you can see that the battery capacity is 3500mAh, which is almost the same as the battery capacity of mainstream mobile phones. Unlike ordinary law enforcement recorders, there is a sim card card under the battery, which can be inserted into the sim card for mobile phones. You can see that this battery comes with a physical lock, which can be easily disassembled.
Remove the battery and expose the SIM card door
SIM card slot under this lid
The author tests a mobile phone card inserted into China Telecom - supports 4G
, but we look at the packaging and there is no license to access the network, which means that this product does not have the call function of a mobile phone. SIM card insertion is only used as a data card. Then this has two meanings: 1. Use a 4G data network to perform PTT public network intercom; 2. Use a 4G network to realize video return.
uses 4G transmission, which is fast and timely
, so the second significance of H.265 is very obvious: it can save the traffic of video backhaul. The traffic of existing 4G data cards is generally limited, generally around 40GB. It is normal for a video with a clarity of 1080P to be several hundred MB and GB. Therefore, better compression can save both traffic and upload time.
actual test: video shooting quality
old tradition, the author tests law enforcement recorder to take pictures of bicycle riding on the road from work to home. The whole journey is 9 kilometers, about 30 minutes. Hainuda product has anti-shake function, so the author half fixes it in front of the car basket. Beijing's Fourth Ring Road is asphalt road, and the bike has very frequent and dense vibrations on it, which can well test the anti-shake ability. This can be reflected in relatively extreme conditions whether Hyainuda products have the ability to shoot videos clearly.
Clear license plate
Street lights are not illuminated enough, and they automatically switch to black and white mode
Pure black environment can also easily take pictures of the handwriting on the exterior wall
When we recorded it, it was already dark and the illumination was reduced. In fact, this is not good for the test. Because the illumination is insufficient, the law enforcement device turned on the automatic color and black and white switching mode to ensure the extraction of clearer key information. Through the video interception, we can see that whether in a relatively dark environment with street lights or without street lights, Hynnda DSJ-HYTH7A1 can shoot key information such as license plates well, and it is very clear, and this is still based on very bumpy conditions.
4G call and upload
Previously, we introduced that Hynnetta DSJ-HYTH7A1 has a sim card slot, which can be inserted into the sim card of the mobile phone to realize data communication. We plugged in China Telecom's mobile phone card (the author's own, supports 4G data), and we can see that after inserting, it supports 4G baseband and can use the Telecom's 4G network. Calls still use 4G data for PTT calls.
Telecom
Regarding transmission speed, it is a variable, which depends entirely on the number of users of the 4G network. If there are many users, the data will be crowded, and it will naturally be slow. Otherwise, it will be very fast. The 4G network in Zhongguancun area that the author tested is actually very crowded, but the data bandwidth resources occupied by calls are extremely low, so it has no impact. If the indoor signal is not good, you can switch to WiFi network to ensure network speed and call quality.
Actual test: Public network call HyteraHyTalk APP can realize PoC call between the mobile phone and the law enforcement recorder
Public network call is another function we tested. The so-called public network calls can not only be established between multiple HNUT law enforcement recorders with digital call functions, but also between the law enforcement recorder and the mobile phone. Just install an App called HyteraHyTalk on the mobile phone. Android phones can be installed very easily and can make calls after logging in to the server. HiNetta has a very rich call settings, from one-to-one full-duplex call to one-to-many group broadcast group calls. As long as the settings are made, it can be realized. For collective action command of law enforcement, the convenience of digital calls is fully reflected.
Battery life and encrypted
From the file name, you can see that the continuous recording was 8 hours and 43 minutes
HEINTA DSJ-HYTH7A1's built-in battery reaches 3500mAh, which is larger than most of the smartphones we use. Because it is a very professional device, the standby and working power consumption of the device itself is very low. During the use, we set the video format to 720P, and the battery capacity is 97% at the beginning of the actual recording, and it starts automatically from 16:54. The last time the battery exhausts is 0:41. The actual recording time is 8 hours and 43 minutes, which is basically consistent with the 9 hours promoted. However, there may be few such applications in reality.
removable battery capacity reaches 3500mAh, which is larger than most smartphones. How can the videos captured by
be exported? If the HINENDA DSJ-HYTH7A1 is directly connected to the computer through the USB interface , there will be no prompt pop-up on the USB drive, and the USB debugging option cannot be found in the settings options. They have been blocked, which means that the videos and images on the HINDA DSJ-HYTH7A1 are all encrypted. You can enter the password to play and watch on the device, but it is not possible to copy or delete it through the computer.
Only by unlocking the law enforcement device management tool can you copy images and videos by reading the USB flash drive, or directly upload the cloud
This is the security of the law enforcement recorder product, and the security of digital video evidence must be guaranteed. Only when the local special software management tool is unlocked can the law enforcement device appear in the form of a USB flash drive. At this time, the video can be copied or cut to a secure computer. Of course, considering the need to save data and evidence, it is best to backup multiple copies and store recovery methods such as Raid1 or Raid5.
Test summary
Hynenda DSJ-HYTH7A1 is a very ambitious product of Hynenda. This product integrates a 4G communication module, so digital intercom or even 4G video upload can be realized, which greatly shortens the time cost of the monitoring center to obtain on-site videos and can improve case handling efficiency. In the past, the export of live videos required returning to the monitoring center and using specialized equipment to perform.
Hynut DSJ-HYTH7A1's fixed chest clip is also different from before, and the machine focuses on
because it integrates many communication modules and a camera that can rotate 216 degrees. The weight and volume of Hynut DSJ-HYTH7A1 itself is larger than that of ordinary products. However, this weight and volume are acceptable.
large screen + Android, Hyundaida DSJ-HYTH7A1 has more possibilities in the future
Hyundaida DSJ-HYTH7A1 is a highly integrated and intelligent product. The large screen + Android system also provides unlimited possibilities for subsequent product function upgrades, and is an attempt for high-end law enforcement instruments. Calling based on 4G networks also replaces the traditional walkie-talkie, making the product two-in-one and giving the product higher value. For users, Hynutta DSJ-HYTH7A1 is more suitable for handling emergencies, realizing the first time to return the on-site situation, and improving the efficiency of the entire case handling process. The screen carried by Hynutta DSJ-HYTH7A1 is large enough to operate easily, which greatly improves the efficiency of use.
uses an Android system. Hynutta DSJ-HYTH7A1 can be expanded and compatible with third-party apps to help the product achieve more functions expansion and upgrades, such as facial recognition, and can be used to conduct further investigations of suspected people in areas with dense crowds. More other functional functions also require users to constantly explore.
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