AVB can improve the problem solved
From the origin of AVB, the emergence of AVB is due to the fact that the communication protocols including Dante, CobraNet and EtherSound are all independently established by each manufacturer. It is not a true international standard. This may be common in the future. Sexuality and compatibility have certain obstacles. In this case, the Institute of Electrical and Electronics Engineers (IEEE) 802.1 committee formed a special working group to propose and introduce the AVB technical standards.
AVB is the abbreviation of Audio Video Bridging, translated into Chinese is the audio and video bridging technology. It is a protocol technology that transmits professional uncompressed audio and video signals based on Ethernet three-layer network. It can support most professional audio and video signal formats and supports up to 512 channels of uncompressed or multi-channel compressed data format audio. The signal supports the transmission of compressed 1080i/p HD video signals over Ethernet, while its bandwidth usage is only 130 Mbit/s. AVB eliminates the buffering delay of the network, allowing multi-channel audio streams and video streams of different sampling rates to be transmitted between different networks and different distances, and supports standard timing and clock signals. All AV devices refer to unified time. Basic, coordinated play.
While the channel capability is greatly enhanced, AVB also greatly shortens the transmission and processing time. The network switch can comprehensively identify the current amount of audio and video information, and intelligently set the priority to ensure its transmission, and at the same time, out of the box. Use, no settings are required. In addition, AVB data can be used in the same network as e-mail, control systems, network communication systems, and VoIP. When using a standard IT infrastructure, AVB technology can easily apply proven IT industry protocols to save time.
AVB implementation costs are low
The current AVB standards are open for use, ie no royalties are charged. With a single standard, manufacturers can also focus on developing standards-compliant products, resulting in economies of scale that mean lower overhead, greater efficiency, and better product compatibility, while further increasing product synchronization rates. And reduce the delay.
In addition, the AVB standard has been developed through IEEE, which will not be outdated and will continue to improve with the implementation of Ethernet technology. And the most important point is that it has a strong advantage in audio, while also transmitting video and control signals, in addition to the powerful advancement of the AVnu Alliance (AVnu Alliance is Cisco, Intel, Samsung, Broadcom, Harman International, Xilinx Joined in August 2009 to create an industry alliance whose mission is to promote the use and certification of AVB standards and to ensure compatibility between AVB devices.
In recent years, many audio manufacturers have joined the ranks to ensure that their research and development work can strictly follow these standards. There is no patent fee, which makes it difficult for the industry to pay attention to AVB. For a time, people have high hopes for this, and believe that the emergence of AVB will create a new era of audio and video industry, and the private agreements of various companies will be eliminated.
There are still some problems in AVB that have yet to be resolved.
However, there are still some problems in AVB that need to be solved. For example, AVB can only determine and use only audio standards. The video standard has not been determined. The audio and video synchronization is the biggest feature of AVB. If there is less AVB, the video is missing. Legs, the advantage is greatly reduced. In addition, the current AVB switch has a fixed port and requires hardware investment. The most important core of AVB technology lies in the AVB switch, but it is different from the existing Ethernet switch and cannot be compatible. No small overhead.
The advantage of AVB lies in the application of large-scale multi-channel projects. Such projects involve a large amount of money, and the equipment of the project side is cautious, and more mature products are selected. The AVB is relatively new, and the support project is not flexible enough to be compatible with existing equipment. In addition, the video standard is delayed, and the investment is much higher than other protocols in the market, so it is rarely used. On the other hand, other technologies, such as Dante, which entered the market earlier, are as powerful and more flexible in terms of audio as AVB. The products have been accepted in the tested market and adopted by leading companies such as Kramer, Sennheiser, YAMAHA, HARMAN and CISCO. It is also the role of leading the benchmark, while the price is more economical than AVB, making the Dante market bigger and bigger.
AVB market has great potential
However, although the Dante protocol is a self-contained transmission protocol, since Dante's protocol architecture is fully compliant with the AVB specification, it is based on the Ethernet three-layer network architecture. Therefore, when the system is upgraded, Dante only needs to update all network card versions. It can be automatically upgraded to the AVB system without changing any hardware devices, so we have reason to believe that the AVB market potential will be infinitely magnified as the AVB video standard development and existing obstacles are gradually eliminated.
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