[ Huaqiang Security Network News ] We can now recall that in the 1960s, when TV changed our lives, there was a "TV generation", and with the development of society, computers came in the 1980s, computers The change of our life and work, the achievement of the "computer generation", is now in the digital age, so the digital age has arrived. 
Among them, the digital video intercom has brought us a good model and distribution method. Compared with the traditional intercom products, the current digital video intercom has been very intelligent, digital and networked. The big embodiment, digital video intercom products not only play the role of visual intercom, remote unlocking, alarm, etc., but also realize remote video surveillance, transaction alarm, access control, three-table CC, information release, smart home control, Internet access And value-added services such as video on demand and even mobile phone linkage. Most of these products have built-in powerful SoC processors and touch TFT displays, especially the standard network functions, which bring more imagination to the products. More and more PVR, DPF digital photo frames can be integrated. Digital video intercoms quietly act as another center of the digital home, depending on digital media capabilities such as phones and media players.
Through the technical development strategy, the digital intercom system generally consists of several modules, such as indoor unit, ladder machine, switch, management machine, etc. Visitors visit, dial the designated indoor unit through the ladder machine, and the ladder machine passes the visitor. After the video and audio information is digitized, the code is compressed and transmitted to the designated indoor unit. The indoor unit receives the video signal transmitted from the network for decompression display, and after determining the identity of the visitor, press the unlock button to open the door lock of the ladder. At the same time, VoIP is also implemented between the ladder machine and the indoor unit, and the two terminals can realize two-way voice intercom, which provides the owner with the need to further identify and confirm the identity of the visitor.
The system provides two-way video and voice transmission between the two indoor units or between the indoor unit and the management unit. In terms of function realization, the ladder machine and the management machine can all be attributed to indoor units. The indoor unit has the most comprehensive functions, and realizes compressed transmission and reception of audio and video, reception decompression display and echo cancellation function, and can be used as a terminal for implementing various network value-added services.
The early digital video intercom video coding format was mostly H.263, which was designed to be compatible with videophones. H.264 as an upgraded version of H.263 provides greater compression ratio and better network adaptability. Based on this, more and more digital video intercom products adopt the H.264 standard as a video compression format. Digital video intercom is currently in an accelerated period of development, both in the market and in technology, and is increasingly becoming an important part of the digital home. Its three main elements: video compression, voice processing, and network transmission make digital video intercom and other home multimedia products. As a result, with the development of technology, higher requirements have been placed on the built-in processor.
All in all, the improvement of digital video intercom technology needs to be improved by the advancement of the times and the needs of people.
Through the technical development strategy, the digital intercom system generally consists of several modules, such as indoor unit, ladder machine, switch, management machine, etc. Visitors visit, dial the designated indoor unit through the ladder machine, and the ladder machine passes the visitor. After the video and audio information is digitized, the code is compressed and transmitted to the designated indoor unit. The indoor unit receives the video signal transmitted from the network for decompression display, and after determining the identity of the visitor, press the unlock button to open the door lock of the ladder. At the same time, VoIP is also implemented between the ladder machine and the indoor unit, and the two terminals can realize two-way voice intercom, which provides the owner with the need to further identify and confirm the identity of the visitor.
The system provides two-way video and voice transmission between the two indoor units or between the indoor unit and the management unit. In terms of function realization, the ladder machine and the management machine can all be attributed to indoor units. The indoor unit has the most comprehensive functions, and realizes compressed transmission and reception of audio and video, reception decompression display and echo cancellation function, and can be used as a terminal for implementing various network value-added services.
The early digital video intercom video coding format was mostly H.263, which was designed to be compatible with videophones. H.264 as an upgraded version of H.263 provides greater compression ratio and better network adaptability. Based on this, more and more digital video intercom products adopt the H.264 standard as a video compression format. Digital video intercom is currently in an accelerated period of development, both in the market and in technology, and is increasingly becoming an important part of the digital home. Its three main elements: video compression, voice processing, and network transmission make digital video intercom and other home multimedia products. As a result, with the development of technology, higher requirements have been placed on the built-in processor.
All in all, the improvement of digital video intercom technology needs to be improved by the advancement of the times and the needs of people.
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