Technology that makes video live streaming more economical and convenient; Source: broadcastengineering; Translated by: Ericfenglei@onebandsys.com
Live video broadcasting through traditional SNG is an expensive and complex technology that requires professional logistical support. For this reason, utilizing advanced cellular technology for live streaming and professional online video transmission simplifies the process while making it more cost-effective. This is a technology that has been widely validated in the field of video broadcasting.
The so-called cellular technology utilizes multiple transmission channels and wireless networks—such as 2.5G, 3G, 4G LTE, WiFi, and WiMAX—to achieve stable and reliable high-definition video transmission solutions.
The technical challenges of cellular technology:
A high-quality video transmission means smooth, stable, and uninterrupted delivery. However, the current characteristics of wireless transmission are instability and fluctuations. Transmitting video over such networks often results in black screens, pixelation, video jitter, and audio-video synchronization issues, problems that persist even in a 4G network environment. Factors that can affect transmission quality, including available bandwidth, latency, and network loss (packet loss), can change the quality of video transmission in just a millisecond.
Therefore, there exists an undeniable inherent gap between high-quality video transmission and cellular technology. However, cellular technology has now proven that we have the capability to bridge this gap and achieve our high-quality transmission goals.
Architecture of Cellular Technology:
Cellular technology uses H.264 encoding to compress video, which is then transmitted through multiple modulator channels that carry portions of the video data packets separately. Unlike transmission over a single channel, cellular technology effectively avoids a single point of failure, minimizing risk, and multi-channel transmission significantly enhances the reliability of video transmission.
The goal of cellular technology is to minimize the risks of live streaming systems while maximizing the quality of live video and the overall performance of the system. To achieve this objective, the cellular system must be capable of real-time, continuous monitoring of all available links within the system and understand how to optimize each link's performance (including current and future links). The system should also be able to dynamically adapt encoding based on variations in the total bandwidth provided by all links, adjusting encoding according to bandwidth changes. For any data loss, the system must automatically compensate and recover. At the receiving end, the system can accept data transmitted back from anywhere in the world, automatically reassemble data signals received from multiple channels, and reconstruct the video stream.
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