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BYOM 视频会议

用于 BYOM 视频会议的半导体解决方案

Semtech 的 AVX 芯片组经过特别设计,可通过铜缆布线和光纤长距离扩展高达 4KP60 4:4:4 (HDMI 2.0b) 的视听内容。AVX 采用 10G 以太网所用的相同技术,使用 Cat-6a 非屏蔽双绞线 (UTP) 电缆实现保证长达 100 米的传输,使用光纤则可达到数十公里。基于 AVX 的器件可同时传输非压缩质量的 4K 视频、多通道音频、千兆以太网、USB 2.0 和其他控制信号,为视频会议室应用中的独立点对点视听扩展开创前所未有的性能水平。

图 1.典型的“自备会议”(BYOM) 设置,用户将运行视频会议软件的设备通过 AVX 链路连接到远程显示器和摄像头。  

上图所示为典型的“自备会议”(BYOM) 会议室,用户将运行 Teams 或 Zoom 视频会议软件的笔记本电脑通过 AVX 链路连接到远程显示器和摄像头。会议室桌面上通常放着一个视听盒,支持通过 HDMI 和 USB 为会议摄像头连接笔记本电脑。然后使用一根铜缆将所有音频、视频和 USB 信号从视听盒传输到会议室墙壁上安装的扬声器、显示器和摄像头。通过使用以太网供电 (PoE),将 AVX 接收器配置为供电设备 (PSE),将 AVX 发射器配置为受电器件 (PD),则桌面视听盒仅需要一条 Cat 电缆连接即可连接远程视听、USB 和电源,从而减少了桌面上的电缆数量,确保简洁干净的设计。

Since AVX Links provide 10Gbps of bandwidth for AV and control signals, with video consuming less than 9Gbps, there is more than enough bandwidth left over to carry the full 480Mbps required by USB 2.0. This means that high quality, low-cost USB 2.0 webcams supporting up to 1080p30 video with very low latency can be used for a full HD video conferencing experience. Other AV extension technologies such as HDBaseT only offer up to 200Mbps maximum of USB 2.0 throughput, which means little to no support of high quality, low latency HD webcams.

Inside the Box with AVX200: Cost-Effective, Lowest End-to-End Latency Performance

MCUHD MI P ort Swi t ch F l a sh SPIXFIMDIO T MDS U SB 2 . 0 I2 C 25 Mhz

Figure 2. Pairing AVX100 with Icron’s ExtremeUSB enables full 480Mbps transmission of USB 2.0.

For the most cost-effective point-to-point matrix switch solution, providing the lowest end-to-end latency performance, Semtech’s AVX100 AV Extender can be used to transmit up to 4K60 video over 100m of Cat-6a standard copper category cabling. If shorter distances are required for smaller meeting rooms, Cat-6 or Cat-5e cable can be used. To enable the full 480Mbps transmission of USB 2.0, the AVX is paired with the ExtremeUSB® device from Icron Technologies. With such a low component count, compact and sleek AV hub designs can be realized for desktop AV connectivity.

MCUHD MI P ort Swi t ch F l a sh SPIXFIMDIO T MDS HD MI Output U SB 2 . 0 A VX Link I2 C PLL25MHz

Figure 3. When paired with Icron’s ExtremeUSB, an AVX100 based receiver provides seamless connectivity and extention of the highest quality HD webcams.

With just a handful of core components, an AVX100 based Receiver can be designed to connect HD and 4K displays, along with 1080p USB cameras, providing an end-to-end solution with sub-millisecond latency for high performance BYOD video conferencing applications using copper category cabling. Paired with the Icron ExtremeUSB device provides seamless connectivity and extension of the highest quality HD webcams. Further implementing PoE with the Receiver configured as the PSE means that the AV hub (Transmitter) can be fully powered over the AVX Link, removing the need for additional power connectivity on the meeting room table.

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