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Code rate adaptive method based on HTTP adaptive stream

A self-adaptive stream and self-adaptive technology, applied in electrical components, transmission systems, etc., can solve the problems of poor bit rate switching smoothness and low bit rate quality, and achieve the effect of simple, high bit rate, and smooth bit rate.

Active Publication Date: 2018-02-02
ZHENGZHOU SEANET TECH CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to provide a code rate based on HTTP adaptive stream in order to solve the technical problem of poor smoothness of code rate switching in the existing HTTP adaptive technology, or low quality of code rate selected due to insufficient use of bandwidth resources. Rate adaptive method, using this method for bit rate switching can realize the smooth switching of bit rate as much as possible while providing high-quality video bit rate, so as to improve user experience

Method used

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  • Code rate adaptive method based on HTTP adaptive stream
  • Code rate adaptive method based on HTTP adaptive stream
  • Code rate adaptive method based on HTTP adaptive stream

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Embodiment 1

[0069] refer to Figure 1-3 As shown, the specific process of using the above code rate adaptive method to operate the HTTP video segment data is:

[0070] Step 110, download the selected HTTP video segment data. In the process of downloading data, the download process will be sampled at equal time intervals, and the sampling bandwidth will be obtained by formula (1).

[0071]

[0072] Among them, S(k) represents the amount of data downloaded from the k-1th sampling time to the k-th sampling time, θ represents the sampling time interval, and T i (k) represents the k-th sampling bandwidth value during the i-th video segment data download process. When the entire video segment is downloaded, a sequence of sampled bandwidths is obtained:

[0073] TD i ={T i (1),T i (2)...T i (k)...T i (M)|θ} (2)

[0074] Step 120, detecting and obtaining information that can reflect the current bandwidth resource status of the terminal. The information includes, but is not limited to...

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Abstract

The invention provides a code rate adaptive method based on an HTTP adaptive stream. According to the method, time sampling is performed on a downloading process, an HTTP adaptive stream bandwidth estimation method is optimized, and the problem that bandwidth estimation is inaccurate when a section is too long is solved; and operation is only performed on an application layer, so as to be simplerto implement. The method specifically designs a safe code rate variation range via a just noticeable difference, and uses the range as a basic principle for selecting a code rate; the method has the characteristics of high code rate and smooth code rate, and improves film watching experience of users.

Description

technical field [0001] The invention relates to the field of multimedia communication, in particular to a code rate adaptive method of HTTP adaptive stream. Background technique [0002] In recent years, with the development of the Web platform and the acceleration of broadband connections, HTTP adaptive streaming media has become the most economical and popular multimedia transmission method today. Its main idea is: encode the original video into multiple bit rate versions on the server side and divide each bit rate version into a sequence of video segments of equal length, and the client downloads video segments by sending continuous HTTP requests. In the process of downloading each video segment, the purpose of dynamically adapting to the current terminal resource is achieved by switching the code rate. HTTP adaptive streaming media combines the advantages of RTSP streaming technology and HTTP progressive download technology, which effectively improves the user's viewing...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06
CPCH04L65/80H04L67/02H04L65/613H04L65/75H04L65/762
Inventor 朱小勇邓丽君耿立宏郭志川
Owner ZHENGZHOU SEANET TECH CO LTD
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