Method, device and system for forwarding video data

A video data and video technology, which is applied in the field of video communication, can solve problems such as picture blurring, shaking, and affecting the user's visual experience, and achieve the effect of reducing data traffic and improving transmission efficiency

CN101568027AActive Publication Date: 2009-10-28HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-10-28

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Abstract

The invention embodiment belongs to the field of video transmission, and discloses a method, a device and a system for forwarding video data. The method includes the following steps: receive and caching a media flow, analyzing the cached media flow, acquiring the TS packet therein, evaluating and identifying the vision sensitivity priority of each TS packet; discarding the TS packet with low vision sensitivity, re-encapsulating the TS packet with high vision sensitivity for forming a novel media flow; transmitting the novel media flow from re-encapsulation to customer equipment, wherein, the TS packet with high vision sensitivity at least includes a video TS packet encapsulating internal coding frames. The TS packet with low vision sensitivity in media flow can be discarded by the network equipment with implementing the invention embodiment. And the method, device and system for forwarding video data provided by the invention reduce the time of rapid channel switch, reduce the network congestion and improve the transmission efficiency, without affecting user vision experience.
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Description

technical field

[0001] The invention relates to video communication technology in network communication technology, in particular to a method, device and system for forwarding video data. Background technique

[0002] Internet Protocol Television (IPTV) is a broadband cable TV network that integrates various technologies such as the Internet, multimedia, and communication, and can provide users with a variety of interactive services including digital TV. A focal problem in the IPTV system is fast channel switching. In existing IPTV systems, channel switching delays are relatively long, which seriously affects the user's visual experience (Quality of Experience, QoE). There are many factors that affect the IPTV channel switching delay, including the time to leave the multicast group of the old channel, the time to join the multicast group of the new channel, the user terminal, such as the set-top box (Set Top Box, STB) de-jitter buffer filling time, waiting The time consumed...

Examples

Embodiment Construction

[0027] Embodiments of the present invention provide a method, device and system for forwarding video data, which are applied in the field of video transmission and are used to reduce data traffic in the network without affecting the user's visual experience. As a specific implementation, the embodiment of the present invention is applied to video transmission using MPEG-2TS standard encapsulation.

[0028] MPEG-2TS is a specification for combining video, audio and other data elementary streams into one or more data streams suitable for storage or transmission. Depending on the quality of the transmission medium. Two different format specifications are defined in MPEG-2: transport stream (Transport Stream, TS) and program stream (Program Stream, PS). The difference between the TS stream and the PS stream is that the packet structure of the TS stream is of fixed length, while the packet structure of the PS stream is of variable length. Since the TS stream adopts a fixed-length...