DIPOL Weekly Review – TV and SAT TV, CCTV, WLAN

No. 1/2022 (January 3, 2022)

Artificial intelligence begins to understand the relationships between objects in an observed scene.

When you look at objects ahead, you will perceive the relationships that exist between them, starting with the position of those objects in relation to the others. For example, there is a phone on the desk in front of the monitor screen and a laptop on its left. You do not think about what coordinates an object has. Without the knowledge of the relative position of the objects, a robot designed, for example, to help in the kitchen, would find it hard to execute a command such as: “pick up the knife that is on the left side of the stove and place it on the cutting board." In an effort to solve this problem, researchers at MIT have developed a model that understands the basic relationships between objects in a scene. This model represents individual relationships one at a time and then combines them to describe the entire scene. This allows more accurate images to be generated from textual descriptions, even if the scene contains several objects arranged in different relationships between them. This solution can be used in situations where industrial robots need to perform complex, multi-step tasks, such as stacking items in a warehouse or assembling equipment. It also brings us closer the possibility of machines learning and integrating into their environment, just as humans do.
To the right of the figure, there is the final image that has been generated from the textual description.
The algorithm developed by the researchers can generate an image of a scene, based on a textual description of the relationship between objects, such as "wooden table to the left of the blue stool, red couch to the right of the blue stool." The system breaks these sentences into two smaller pieces that describe each individual relationship ("wooden table to the left of the blue stool" and "red couch to the right of the blue stool"), and then models each piece separately. These pieces are then merged in an optimization process that generates a scene image. By breaking the sentences into shorter pieces, for each relationship, the system can combine them in different ways, so it is better able to adapt to scene descriptions it has not seen before. The system also works in the reverse direction, where, given an image, it can find textual descriptions that match the relationships between objects in the scene. Moreover, the model can be used to edit the image by rearranging objects in the scene to fit the new description.
The researchers compared their model with other deep learning methods that had been given text descriptions and tasked them with generating images depicting matching objects and relationships between them. In each case, their model performed better than the baseline methods. People were also asked to evaluate whether the generated images matched the original scene description. In the most complex examples, where descriptions included three relationships, 91 percent of participants said the new model performed better.
While the initial results are encouraging, the researchers would like to see how their model performs on more complex real-world images with noisy backgrounds and objects that obscure one another. They are also interested in eventually integrating their model into robotics systems, allowing the robot to infer relationships between objects from the videos and then apply that knowledge to manipulate objects in the world.

House amplifiers in SMATV antenna systems – 700 MHz band.

One of the key parts of a coaxial path in cable networks are broadband amplifiers. They are mainly designed to amplify the higher frequency RF signal so as to enable its further distribution (loss compensation on passive network elements: cabling, splitters, sockets). Broadband amplifiers are devices enabling the transmission of signals in the forward (to the subscriber) and reverse (from the subscriber) directions, provided that they have return channel.
The implementation of 5G technology on the released 700 MHz band, so far used by DVB-T digital terrestrial television, enabled in the extension of DIPOL range with new models of house amplifiers with an integrated signal filter LTE 700. The operating band for these amplifiers is limited by the top frequency of 694 MHz.
Product HS-004T MA-049T HA-131T HA-205R65
   R81004  R81049  R81131  
Code R81004 R81049 R81131 R82307
Frequency range [MHz] 88-230
470-694
88-108
174-230
470-694
88-694 5-65
47-862
Max. output level [dBμV] 121 115 122 115
Gain
forward [dB]
36-39/39-44 30/34 36 27/36
Return channel  NO NO NO YES
Gain
reverse [dB]
- - - 27/-4
LTE700 filter YES YES YES NO

Main components of a modular IP video intercom.

The modular second generation IP video intercom Hikvision is characterized by high functionality and expansion options. The gate/door station can be assembled of different components depending on the needs. An essential part of the modular door station is the main module with a camera. The display module shows information on the status of the door/gate station. It informs the caller about calling action, that the door has been opened, allows selecting the destination contact from the list of residents (max. 500) in order to make a call. If a code lock functionality is required, then a keypad has to installed that allows the lock to be unlocked and to select the subscriber’s number. If the user wants to open the door using RFID transponders, such a reader must be added. One door station can be expanded with up to 8 add-on modules (1 main module + 8 add-on modules) for different functionality depending on the requirements.
Main module with expansion modules in the IP system
Main module of IP video intercom Hikvision DS-KD8003-IME1
Main module
DS-KD8003-IME1/EU
G73652
Card Reader Module: Hikvision DS-KD-E  (EM 125kHz)
EM 125 kHz card reader module
DS-KD-E
G73660
Mifare card reader module 13.56 MHz Hikvision DS-KD-M
Mifare 13,56 MHz card reader module
DS-KD-M
G73662
Indicator Module: Hikvision DS-KD-IN (for IP video intercom)
Indicator module
DS-KD-IN
G73664
Name Tag Module: Hikvision DS-KD-KK (6-button, for IP video intercom)
Name tag module
6-button DS-KD-KK
G73666
Numeric Keypad: Hikvision DS-KD-KP (for IP video intercom)
Numeric keypad module
DS-KD-KP
G73668
IP Video Intercom Display Module: Hikvision DS-KD-DIS (3.5
Display module 3.5"
DS-KD-DIS
G73670
Blank module: DS-KD-BK Hikvision for IP video intercom
Blank module
DS-KD-BK
G73672

how to move to another computer the list of devices managed by iVMS-4200?

Devices managed by the client software are placed on a special list which, along with other iVMS-4200 program settings, can be transferred between different computers. This is also useful when installing a new software version, as it is then recommended to uninstall the application.
To generate the configuration file click the Main Menu button and from the drop down menu select System → Export configuration file.
iVMS-4200 is client software dedicated to the management and supervision of Hikvision security systems, such as recorders (IP, TurboHD), video intercoms, access control, set-top boxes, etc. The software allows you to easily and conveniently monitor all systems by offering viewing from IP cameras, remote playback of recordings, remote configuration, handling of alarm events, two-way audio transmission, e-map support, recording to a HDD and many more. The application can manage 256 devices and display images from 64 cameras in total on 4 monitors.

How to choose the right GSM/LTE repeater?

The repeater is used to amplify GSM, DCS, 3G, LTE signal and bring it inside the premises. The repeater has to be connected with an external antenna, directed towards the base station of the operator, and to an internal antenna which will distribute the amplified signal. The following are the criteria for selecting a suitable amplifier.
    • The first important information to have before purchasing an amplifier is the type of band to be amplified:
      • GSM, EGSM – this band is found in and outside the city. By amplifying this band, you can talk as well as transmit data (Internet) through the cellular network.
      • DCS – this band is primarily found in the city due to the large capacity of the base station (need to support a large number of terminals).
      • WCDMA (3G) – this band is found in the city and allows for high speed data transmission (mobile internet (HSDPA), video calling and other 3G services).
      • LTE – this band allows for high speed data transmission (mobile internet (LTE), calling (VoLTE)).
    • Another important information is the size of the area to be covered by the amplified signal:
      • For the GSM signal:
        • less than 300 m2, then the Signal GSM-305 A6765 repeater is a suitable device,
        • more than 300 m2, and less than 800 m2, the Signal GSM-505 A6775 repeater with several outdoor antennas A741001 has to be used,
        • less than 1200 m2, the Signal GSM-1205 A6785 repeater is the right choice,
        • more than 1200 m2, use Signal GSM-1205 A6785 with A741001 antennas.
      • In the case of GSM, DSC, 3G, LTE signals (Signal GDW-505 A6777), a device covering an area of 500 m2 with one internal antenna is available.
N-male to N-male Cable (5m RF-5)N-male to N-male Cable (10m RF-5)GSM/DCS/UMTS Antenna: TRANS-DATA KYZ8.2/9.5GSM Amplifier/Repeater SIGNAL GSM-505 (without PSU)AC/DC Adapter: 9 VDC, 3A (2.1/5.5 mm) WT48-0903000-TTwo-way TRANS-DATA GSM SplitterGSM/DCS/UMTS Antenna: TRANS-DATA DW3-AGSM/DCS/UMTS Antenna: TRANS-DATA DW3-A

Joining oblique (APC) and straight (UPC) optical connectors.

Single mode fiber optic connectors can come in two ferrule cut versions: APC (angled physical contact) and UPC (Ultra Physical Contact). In UPC connectors the ferrule face is flat, whereas in the APC, the connector face is polished at an 8 degree angle. Thanks to the latter solution, when the light passes through the media boundary (i.e. at the junction of two connectors), the reflection of light is much lower, which has favorable effect on transmission performance.
In many cases transmitting devices require using specific type of ferrule ground. The use of other than recommended type results in much higher attenuation of the connection and in extreme cases can lead to damage of the connector in the device or cable plug. Always make sure what type of connector is used in a given device. In case the fiber optic cable is terminated with an inappropriate type of connector, an adapter and connecting pachcord or a much more convenient solution with an adapter can be used.
Single mode adapter SC/APC male - SC/UPC female
When the device requires an SC/APC (green) connector and the cable is ended with the SC/UPC (blue) connector, the L4401 adapter can be used to ensure proper ferrule matching. Otherwise the L4402 adapter should be used.
Other versions of hybrid adapters are available here.

New products offered by DIPOL

TRANS-DATA 5G DZ7 antenna
The TRANS-DATA 5G DZ7 A741009 is an external omnidirectional antenna designed to improve the 5G/LTE signal reception. The antenna offers a gain of 3-5 dBi in the bands: 617-960, 1710-2700, 3300-4200 MHz, making it ideal for mobile signal reception.



Compact IP Camera: Hikvision DS-2CD2686G2-IZS(C) (8 MP, 2.8-12 mm MZ, 0,003 lx, IR up to 60 m, WDR, IK10, H.265, AcuSense)
Compact IP camera Hikvision DS-2CD2T43G2-2I K05264 belongs to the second generation of cameras based on the AcuSense technology, notable for even more effective filtering out of false alarms. The device is dedicated for use in CCTV systems based on IP DVRs/NVRs. The camera is fitted with an 8 Mpix 1/1.8" CMOS sensor and an IR illuminator with a range up to 60 m to ensure proper visibility in low-light conditions. It has a varifocal 2.8-12 mm Motozoom type lens, enabling remote viewing angle change in the range 108-46°. The lens focuses automatically after the focal length change.

Video Intercom Kit: Hikvision 2-Wire DS-KIS703-P
DS-KIS703-P – 2-WIRE HIKVISION 2ND GENERATION VIDEO INTERCOM KIT G73306 is a complete 2-Wire Hikvision 2nd generation video intercom kit which includes the DS-KV8103-IMPE2 door station, DS-KH6320-WTPE2 monitor, a surface-mounted protective housing, and a power supply. To power the system connect the DC 24 V power supply to the monitor. The door station is powered from the monitor after the devices are directly connected via a 2-wire bus. The electric door strike can be supplied directly from the door station using the dedicated DC 12 V output

Worth reading

Signal Fire AI-8C and AI-9 – which model to choose? One of the most common questions from installers thinking of buying fiber optic splicers is the choice of the model. Signal Fire offers two models of splicers: AI-8C L5870 and AI-9 L5875.
These splicers do not differ from each other in the way they work and in their use and configuration. Both models splice fibers in the same way, and they are configured using a smartphone with an appropriate app. What makes the two models different from each other is the appearance and the additional capabilities of the AI-9 model to verify the correctness of the completed fiber optic link...>>>more
LTE antenna selection
LTE antenna selection