Data transfer method and device

Abstract

The invention discloses a data transmitting method, comprising: when detecting the change of data transmission network conditions, selecting an encoding / decoding algorithm whose compression ratio is suitable for the current network conditions, and adopting the selected encoding / decoding algorithm to make the follow-up data transmission. And the invention also discloses a data transmitting device, comprising: network condition monitoring module, encoding / decoding algorithm regulating module, and data transmitting module. And the invention raises the data transmitting rate. When the network conditions turn bad, it selects an encoding / decoding algorithm whose compression ratio is higher than that of the current encoding / decoding algorithm to reduce the network bandwidth occupied by the data transmission, to a certain extent, relieving network pressure, increasing Jitter Buffer depth shrinking rate, and reducing communication delay; when the network conditions turn good, it selects an encoding / decoding algorithm whose compression ratio is higher than that of the current encoding / decoding algorithm to increase transmitted data information and improving the received data quality. And the invention is simple to implement and easy to apply without adding any hardware equipment.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a data transmission method and device. Background technique [0002] With the development of Internet technology, the application of transmitting voice, video and other information through the Internet is becoming more and more extensive. When transmitting voice and video data, in order to reduce the bandwidth occupied by data transmission and speed up data transmission, it is necessary to compress and package the transmitted voice and video data packets. [0003] The process of transmitting data through the Internet will be described below by taking Voice over Internet Protocol (IP) (VOIP) transmission as an example. Figure 1 shows a typical network diagram of Voice over Internet Protocol (IP) (VOIP) transmission, as shown in Figure 1, the basic principle of VOIP transmission is as follows: Two IP voice gateways supporting Session Initiation Protocol (SIP) are connec...

AI Technical Summary

Problems solved by technology

It can be seen that the abnormal reception of data packets such as: out-of-order and packet loss is more serious, the number of data packets cached in the Jitter Buffer will be more, that is, the depth of the Jitter Buffer will be higher. At this time, the Jitter Buffer The speed at which the data packets are played to the user is slowed down, which increases the communication delay and the data transmission efficiency is low

[0006] At the same time, when there are few or no exceptions in the reception of data packets, the depth of the Jitter Buffer will decrease. At this time, the Jitter Buffer will play the received data to the user in time. However, when the network condition is good, the network can Provide more bandwidth for the user to transmit data packets, but because in the prior art, after the two ends of the communication negotiate and determine the voice codec algorithm when the call is established, the codec algorithm will not be changed, so the bandwidth occupied by the user to transmit data packets will be reduced. remains the same, bandwidth utilization is lower and thus data transfer less efficient

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