Agora Lab, Inc.

Zhejiang Gongshang University

Jiang Li

Zheyuan Zhang

Xiaoning Jiang

Kelei Jiang

Fengqing Zhang

Zhendong Yu

Yang Ma

Xuyi Chen

A new real-time video communication device improves the clarity of shared screen by automatically adjusting the key frame's quantization parameter values. The adjustment depends on the underlying network's connection condition. When the connection bandwidth deteriorates, the key frame's quantization parameter value is further decreased on the value output from a standard H.264 encoder to derive a desirable quantization parameter value and thus achieve a desirable user experience of the shared screen. Moreover, the new real-time video communication device adjusts the frame rate of the shared screen based on the present quantization parameter value to achieve a more desirable user experience of the screen sharing.

System and method for automatically adjusting key frame quantization parameter and frame rate

A new real-time video communication system and method improves the clarity of shared screen by automatically adjusting the key frame's quantization parameter values. The adjustment depends on the underlying network's connection condition. When the connection bandwidth deteriorates, the key frame's quantization parameter value is further decreased on the value output from a standard H.264 encoder to derive a desirable quantization parameter value and thus achieve a desirable user experience of the shared screen. Moreover, the new real-time video communication system and method adjusts the frame rate of the shared screen based on the present quantization parameter value to achieve a more desirable user experience of the screen sharing.

The disclosure provides an MQTT-based distribution Internet of Things system and a method thereof. The system includes: a sensing ring including a plurality of data acquisition and monitoring devices and a sensing control module provided in a distribution network; an application ring including a plurality of application servers and an application control module; a communication ring including at least one communication module, each communication module being connected with the application control module and a corresponding sensing control module respectively. The application ring is configured to issue an application request, so that the sensing ring controls a distribution device in the distribution network according to the application request and acquires device data of the distribution device, and the sensing ring feeds the device data back to the application ring; and/or the sensing ring is configured to sense and acquire the device data of the distribution device, and send the device data to the application ring, so that the application ring performs data management, data processing, data analysis, data monitoring and data pre-warning on the device data. The method has a beneficial effect that the constructed distribution Internet of Things system is simpler.

MQTT-based distribution internet of things system and method thereof

Growing community of inventors

Hangzhou, China

Jiang Li