Bit rate control method in video transmission process

A rate control and video transmission technology, applied in digital video signal modification, image communication, selective content distribution, etc., can solve problems such as affecting user experience

Active Publication Date: 2019-07-19
ZHONGGUANG REDIANYUN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual operation of this method, the size of the buffer area is adjusted by adjusting the 25% variation range of the playback speed. However, the 25% variation of the playback speed leads to a large abnormal state of the picture and sound, which affects the user experience.

Method used

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  • Bit rate control method in video transmission process
  • Bit rate control method in video transmission process

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] Embodiments of the present invention will be described below with reference to the accompanying drawings. see figure 1 , a code rate control method of a video transmission process, the method comprising:

[0033] S1. According to the comparison of the transmission delay in the current period of the buffer zone and the transmission delay in the previous period, predict the change of the transmission delay in the next period; if the predicted transmission del...

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Abstract

The invention relates to a video transmission rate adaptation method applied to wireless networks. The video transmission rate adaptation method includes preliminarily arranging an output cache area at an output end of a buffer area; storing data packets outputted from the buffer area in the output cache area and acquiring the total amount of the stored data packets in current unit time thresholds; adjusting the speeds for reading data of the buffer area if the total amount of the data packets stored within the current unit time thresholds is unequal to the total amount of data packets storedwithin a previous unit time threshold and fluctuates within the range of 10% of the total amount of the data packets stored within the previous unit time threshold; adjusting the strength of encodersfor processing I frames of images in a next time frame if the total amount of the data packets stored within the current unit time thresholds does not fluctuate within the range of 10% of the total amount of the data packets stored within the previous unit time threshold but fluctuates within the range of 35% of the total amount of the data packets stored in the previous unit time threshold. Unittime thresholds for storing the corresponding data packets are preset in the output cache area.

Description

technical field [0001] The invention relates to the field of video playback, in particular to a code rate control method in the video transmission process. Background technique [0002] As the requirements for video playback are getting higher and higher, traditional streaming media systems use the method of buffering frames to overcome the instability caused by channel changes and other reasons. The buffering of frames uses a certain delay in exchange for video fluency. When the signal condition deteriorates and the buffer underflows, the media playback will be paused, and the playback will continue after buffering. However, this method is likely to cause interruption of video playback, and it is difficult to ensure the real-time performance of video transmission, which affects the user's viewing experience. [0003] In view of the above problems, the patent document 201310006416.X discloses a bit rate smoothing method for real-time video transmission under wireless network...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/2662H04N19/146
Inventor 纪琦华蒲珂曾泽基方宏李哲山鲁豪胡彬魏明
Owner ZHONGGUANG REDIANYUN TECH CO LTD
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