Data processing method and device

A technology for data and data volume, applied in the field of data processing methods and devices, can solve the problems of inaccurate bit rate of streaming media data, asynchronous bit rate, and stuck streaming media data transmission, etc., to achieve the effect of improving transmission efficiency

Active Publication Date: 2018-09-14
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

[0005] In order to solve the problem that the determined bit rate of streaming media data during transmission is inaccurate and the transmission of streaming media data is stuck due to the out-of-synchronization between the network bandwidth prediction and the adjusted bit rate of the first device, the embodiment of the present invention provides a A data processing method and device

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Embodiment Construction

[0067] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0068] First, some nouns involved in this article are explained.

[0069] 1. I frame (also known as intra picture): represents a key frame, which is a coded image frame that compresses the amount of streaming media data by removing redundant information in the image space as much as possible.

[0070] 2. P frame (also known as predictive frame): it is a coded image frame that compresses the amount of streaming media data by sufficiently reducing the temporal redundancy information of the previous coded frames in the image sequence. That is to say, the P frame compresses the data of this frame according to the different characteristics of the current frame and the adjacent previous frame image (I frame or P frame). An image sequence us...

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Abstract

The invention discloses a data processing method and device and belongs to the technical field of data. The method comprises the steps of obtaining practical transmission efficiency of streaming mediadata, wherein the practical transmission efficiency is determined according to a ratio between second streaming media data quantity received by a second device and first streaming media data quantitysent by a first device; inputting the practical transmission efficiency and preset target transmission efficiency into a proportion-integration-differentiation (PID) controller, thereby obtaining anadjustment coefficient; and adjusting a transmission bit rate of the streaming media data by a coder according to the adjustment coefficient. According to the method and the device, the problem that the streaming media data transmission is delayed due to the fact that a network bandwidth predicted by the first device is asynchronous with an adjustment bit rate is solved. The first device does notneed to predict the network bandwidth, so the adjustment coefficient which is not suddenly changed within short time can be obtained through utilization of the PID controller. The transmission efficiency of the streaming media data is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of data processing, and in particular, to a data processing method and device. Background technique [0002] In streaming media technology, a first device sends streaming media data to a second device in real time, and accordingly, the second device receives and plays the streaming media data sent by the first device in real time. [0003] Since the first device needs to send streaming media data to the first device through the network, when the network bandwidth of the network is low, or the network delay is long, or the network bandwidth changes seriously with the movement of the first device, if the first device Sending streaming media data to the second device at the same bit rate in different time periods will cause a problem of unsmooth transmission. At this time, how to ensure that the second device can smoothly transmit streaming media data is an urgent problem to be solved. Wh...

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Application Information

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IPC IPC(8): H04N21/238H04N21/2662
CPCH04N21/23805H04N21/2662H04N19/146
Inventor 许湔
Owner HANGZHOU HIKVISION DIGITAL TECH
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