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A system, base station and method for controlling video rate

A video and base station technology, applied in the field of video rate control systems, can solve the problems of rate adjustment lag and difficulty in finding, and achieve the effect of avoiding loss events

Inactive Publication Date: 2016-08-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the delay of the feedback mechanism itself, the rate adjustment always lags behind the occurrence of network congestion and loss events, making it impossible to avoid the adverse impact of loss events caused by network congestion on the quality of received video
[0008] It is difficult to find a video rate adjustment scheme that is suitable for wireless networks, does not require feedback from the receiving end, can dynamically adjust the parameters of video compression based on video content according to network conditions, and can consider all transmission delays

Method used

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  • A system, base station and method for controlling video rate
  • A system, base station and method for controlling video rate
  • A system, base station and method for controlling video rate

Examples

Experimental program
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example 1

[0088] Example 1: The specific operation steps are as follows:

[0089] (1) The encoder uses different QP values ​​to compress the input video

[0090] For a given video coding unit slice, different QP values ​​result in different compression bits. The encoder transmits the compressed bit number information shown in Table 1 obtained after encoding to the controller.

[0091] Table 1 Information from the encoder to the controller

[0092]

[0093] (2) The controller calculates the packet loss rate and delay of each data packet

[0094] In general, data packets output from video compression are divided into multiple information coding blocks of the same length before scheduling. These encoded blocks form a queue to be served by the queue scheduler. The service rate of the queue is the throughput rate of the wireless channel. The arrival rate of encoded blocks for this queue depends on the video stream rate. Given a video frame rate, the video streaming rate depends on t...

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Abstract

The embodiment of the invention discloses a system, a base station and a method for controlling video rate, and the system includes: a coding module, a control module and a queuing scheduling module. By applying the embodiment of the present invention, loss events caused by network congestion in the wireless network can be effectively avoided. Dynamic adjustment of video compression parameters based on video content can be performed according to network conditions without any feedback from the receiving end that finally receives video data. Moreover, since the embodiment of the present invention considers all transmission delays through the obtained system state parameters, the situation that the end-to-end delays of data packets at different arrival rates of data packets on the transport layer cannot be considered cannot be avoided.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular, to a system, a base station and a method for controlling a video rate. Background technique [0002] Video communication, especially real-time video communication, is expected to become the main communication service form in the Long Term Evolution (LTE, Long Term Evolution) wireless network. Due to the scarcity of wireless resources, from the perspective of operators, a good LTE-based video communication system should be able to achieve the maximum system capacity, that is, support the maximum number of users, and at the same time provide a satisfactory user experience, such as receiving video quality , video continuity, etc. [0003] In wireless networks, packet loss is mainly caused by two reasons: network congestion and random wireless channel errors. Like random wireless channel errors, packet loss caused by network congestion in low-bandwidth or f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/00H04N19/61H04W28/06H04W28/14
CPCH04L47/25H04L47/283H04L47/38H04N19/124H04N19/164H04N19/172H04N19/174H04N21/2402H04N21/2662
Inventor 张伟张锦芳李波杰慈松彭程晖
Owner HUAWEI TECH CO LTD