H.264 video Development Technology

Real-time audio and video communication development is also called Instant Messaging development.

In short, the development of real-time audio and video communication is based on the advanced H. 264 video coding standards, AAC audio coding standards and P2P technology, the high quality, wide adaptability, distributed, and modular Network Audio/Video interaction platform designed by integrating audio/video coding and multimedia communication development technologies can meet people's real-time communication needs.

With the development of the Internet, communication between people has gradually moved from telephone to Internet. Every day, quite a few people are using various network communication tools, such as QQ, ICQ, MSN, and Sina Weibo. We can see that people are very keen on instant communication on the Internet, and they can accommodate far more than we expected. However, most of the network communication tools are still dominated by text, and most of the voice and video functions are not mature enough. Many aspects need to be taken into account to achieve voice and video completely through the network, such: hardware, software, technology, and network. The pure text communication method is very inefficient and does not conform to people's common habits. as a tool for recreation, it is far from reaching a true communication method. Therefore, the development of real-time audio and video communication was born.

The development of real-time audio and video communication involves a wide range of technical fields, mainly in the following areas:

Audio Technology: AAC formed the International Standard ISO 1997-7 in 13818. The Advanced Audio Coding AAC has been developed to become a new generation of audio compression standards following the MPEG-2 audio standard (ISO/IEC13818-3.

Currently, the most advanced video technology is not h. 264 none, H. the biggest advantage of 264 is the high data compression ratio. h. 264 of the compression ratio is more than 2 times of the MPEG-2, is the MPEG-4 of 1.5 ~ 2 times. H.264 has many new features that are different from the old standard, and they work together to improve coding efficiency. Especially in intra-Frame Prediction and encoding, inter-Frame Prediction and encoding, variable vector block size, 1/4 Pixel Motion Estimation, multi-reference frame prediction, adaptive loop block filter, integer transformation, quantization and transformation coefficient scanning, entropy coding, and weighted prediction all have their own unique considerations.

Real-time audio and video communication development must adopt Dynamic buffering technology to adapt to different network environments (Lan, enterprise private network, Internet, 3G network), and dynamically adjust relevant parameters according to different network statuses, the instant messaging platform has excellent performance in a variety of network environments, and is optimized for applications such as the Internet and 3G networks, it provides upper-layer applications with Dynamic Adjustment interfaces for video quality and audio quality.

H.264 video Development Technology