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A Bit Rate Adaptive Method Based on HTTP Adaptive Stream

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

Active Publication Date: 2019-12-17
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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  • A Bit Rate Adaptive Method Based on HTTP Adaptive Stream
  • A Bit Rate Adaptive Method Based on HTTP Adaptive Stream
  • A Bit Rate Adaptive Method Based on HTTP Adaptive Stream

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Experimental program
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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 present invention provides a code rate self-adaptive method based on HTTP self-adaptive flow. This method optimizes the bandwidth estimation method of HTTP self-adaptive flow by performing time sampling on the download process, and solves the problem of insufficient bandwidth estimation when the segments are long. The standard problem; and only in the application layer operation, the implementation is simpler. This method specifically designs the safe change range of the code rate through the minimum perceivable difference, and uses this as the basic principle for selecting the code rate. This method has the characteristics of high code rate and smooth code rate, and improves the user's viewing experience.

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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Patent Type & Authority Patents(China)
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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