Basic knowledge of UHD conference cameras_2

IV. Features of HD Conference Cameras

HD conference cameras typically have the following features:

High-definition images: Utilizing a high-definition CMOS sensor, they capture high-quality, high-definition images and support multiple image output formats.

Smart Menu Programming: Built-in smart menu programming allows users to quickly and conveniently customize the camera to their needs.

Multiple Interface Support: HD conference cameras typically support a variety of interfaces, such as HDMI, USB, and 3G-SDI, for easy connection to other devices.

Ultra-low illumination: Utilizing ultra-low illumination technology, they capture clear, realistic images even in extremely low-light environments.

High-speed motion detection: Supports high-speed motion detection, automatically tracking moving objects and adjusting the camera's position and parameters to ensure optimal capture.

Multi-screen display: Supports multi-screen display, combining multiple camera feeds into a single view for viewing multiple scenes simultaneously.

Remote control: Supports remote control via the network, making camera operation more convenient.

Alarm function: Supports an alarm function. When an abnormality occurs, the camera automatically generates an alarm and records the alarm information.

Built-in Gravity Sensor: Supports a built-in gravity sensor, which automatically adjusts the camera's shooting angle and position to ensure the best possible shot.

Low-Power Sleep Function: Supports low-power sleep and wake-up functions, effectively reducing power consumption.

V. Specifications for HD Conference Cameras

Key specifications for HD conference cameras include the following:

Security Industry Standards: HD conference cameras must comply with security industry standards, such as GB/T 28181-2011, "Technical Requirements for Information Transmission, Exchange, and Control of Networked Security Video Surveillance Systems" and GA/T 646-2006, "Technical Requirements for Image and Video Communication Quality over Information Networks."

Audio and Video Coding Standards: HD conference cameras must support common audio and video coding standards, such as H.264 and H.265, to meet the image coding and transmission standards for video conferencing.

Network Communication Standards: HD conference cameras must support common network communication standards, such as TCP/IP and UDP, to ensure smooth network communication with other devices.

Image Quality Standards: HD conference cameras must meet relevant image quality standards, such as SNR (signal-to-noise ratio) and resolution, to provide high-quality images.

Other Related Standards: In addition to the standards listed above, HD conference cameras must also comply with other relevant standards, such as those for lightning protection, grounding, and anti-interference.

VI. What are the transmission protocols for HD conference cameras?

Common transmission protocols used by HD conference cameras include the following:

RTSP (Real-Time Streaming Protocol): RTSP is a real-time streaming protocol used for streaming media. It utilizes a push server approach, where the audio and video viewer sends a request, and the network camera continuously pushes audio and video encoded data encapsulated in RTP packets to the viewer. RTSP is commonly used for real-time audio and video transmission and supports remote control of streaming media, such as fast forward and rewind.

RTP (Real-time Transport Protocol): RTP is a real-time transport protocol used to provide a reliable end-to-end byte stream over unreliable internet networks. It is often used in conjunction with RTCP (Real-time Control Protocol), which monitors transmission quality and performs flow control. RTP is widely used for real-time audio and video transmission, such as video conferencing and live streaming.

HTTP (Hypertext Transfer Protocol): HTTP is a standard protocol for application-layer communication on the internet, widely used for communication between web browsers and servers. HD conference cameras provide web access via HTTP, enabling the transmission of audio and video data across complex networks.

UDP (User Datagram Protocol): UDP is a connectionless transmission protocol suitable for applications requiring fast data transmission. It provides a simple way to send and receive data segments. In HD conference cameras, UDP is often used to encapsulate real-time network audio and video data. Even if packet loss occurs during network transmission, the audio and video viewing on the client is not affected.

TCP (Transmission Control Protocol): TCP is a connection-oriented transmission protocol that provides a reliable data transmission service. It transmits data through the steps of establishing a connection, sending data, and receiving confirmation. TCP is typically used in applications requiring guaranteed data integrity and reliability, such as file transfers and email. In HD conference cameras, TCP is not typically used for real-time audio and video transmission because its reliability issues can lead to delays and packet loss.

Common transmission protocols used in HD conference cameras include RTSP, RTP, HTTP, UDP, and TCP. Different protocols have different characteristics and application scenarios, so you need to choose the appropriate protocol for transmitting audio and video data based on your specific needs.