2014منتدى Video Assist and Video Accessories
Nmbus WiMi6200 HD-SDI wireless video transmitter performance and capabilities
مضى على هذا 12 سنة. قد تكون المعدات والأسعار قد تغيّرت منذ ذلك الحين.
ما توصّل إليه النقاش
- The WiMi6200 can transmit HD 1080p video up to 3000 feet line-of-sight using standard 6dBi antennas with 2 frame latency when receiving on a dedicated receiver unit.
- The system can penetrate multiple building walls, with confirmed transmission through 4+ house walls in production use.
- وتعمل شبكة ويفي للتوصيل إلى الحواسيب المحمولة والأجهزة المحمولة على نطاق أقصر بحوالي 200 قدم مع 4-6 إطارات للراحة بالمقارنة مع جهاز الاستقبال المخصص.
- Latency changes based on bitrate, with 12 Mbps producing 2 frames of delay while 25 Mbps produces 4 frames of delay.
- The transmitter uses 802.11n WiFi on the 5GHz band with 50mW transmitting power and 3x MIMO antenna technology.
- The device can transmit to multiple receivers simultaneously in multicast mode or to a single receiver with WiFi streaming disabled.
- The system performed reliably through RF-dense environments and on location commercial productions with consistent transmission through building walls.
- Picture quality from the transmitter was noted as superior to some competing wireless video systems for focus pulling and video village monitoring.
- The 2 frame latency can cause noticeable lip-sync issues between audio and video in scenarios where synchronized monitoring is critical.
- Power connector is 4-pin mini-XLR with no option for alternative connectors like Lemo at the time of discussion.
- Audio delay can be managed using external audio delay units to compensate for video latency.
يعتمد على
- FCC approval status was pending at the time of discussion with confirmation expected Monday.
- Latency may be problematic for focus pullers and director monitoring in sync-critical situations.
- Dedicated receiver required to achieve the full 3000 foot range and 2 frame latency specifications.
- WiFi streaming option has significant latency increase to 4-6 frames compared to dedicated receiver path.
- The system uses open WiFi transmission which raises potential security concerns about unauthorized viewing.
- European regulatory approval was not addressed in the thread.