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Noise reduction method and device concerning IP network voice data packet lost

A voice data, IP network technology, applied in the field of repairing noise reduction, can solve problems such as the inability of voice communication to break through, affecting the effect of voice communication, etc., to ensure high-quality transmission, reduce noise or noise interference, and play complete effects.

Inactive Publication Date: 2006-02-08
VIMICRO CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This mute technology eliminates the unbearable noise interference to voice communication to a certain extent, but when the receiver of the voice communication is in a situation where the data packet loss rate remains high, frequent muting will still be noticeable. The interruption and discontinuity of the voice will affect the effect of voice communication. This situation is called "quiet noise"
[0008] It can be seen from this that if the call quality problem caused by data packet loss in the IP network cannot be effectively solved, the bottleneck of voice communication will not be broken through

Method used

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  • Noise reduction method and device concerning IP network voice data packet lost
  • Noise reduction method and device concerning IP network voice data packet lost
  • Noise reduction method and device concerning IP network voice data packet lost

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] In order to illustrate the present invention more clearly, at first reference will be made to the attached figure 1 , 2 , 3. Describe in detail the principle of the method and device for repairing voice data packet loss in the prior art.

[0039] In the voice communication application based on the IP network, the voice data collector collects the voice data, and the voice data transmitter adopts the UDP protocol to pack the voice data in sequence, and sends them in sequence.

[0040] Usually, a buffer array with the same size and continuous addresses is configured in the voice data receiver at the receiving end, such as figure 1 shown. After the voice data receiver receives the voice data packets, it will put them into the buffer array according to the sequence numbers in the data packets, so as to achieve the purpose of sor...

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Abstract

The invention discloses a method for noise reduction and preventing the loss of IP network voice data pack which comprises the steps of: calculating the most economical convention length L by getting a section of voice data pack from sender and separating voice segments with L; packing the separated voice segments and sending via IP network; if data packs are lost on voice data receiver and their adjacent voice data packs are not lost, then generating an energy wavy line for restoring the lost voice data pack according to its adjacent data packs. The invention also provides apparatus for sending and receiving voice data packs. The inventive apparatus is characterized in keeping the restored voice data integrate and smooth during play and reducing interference.

Description

technical field [0001] The invention relates to a method for repairing and reducing noise after data packet loss when voice data is transmitted over an IP network, in particular to a noise reduction method for IP network voice data packet loss; [0002] The invention also relates to a voice sending device and a voice receiving device adopting the method. technical background [0003] With the popularization of the network, various network data communication applications bring people closer and closer in work and life, and the voice communication system among them is even more powerful, and has a tendency to replace the traditional analog telephone. It is precisely because the digital network voice communication system is playing an increasingly important role in work and life, and everyone's requirements for its call quality are becoming more and more stringent. [0004] At present, the vast majority of network voice communication systems use the User Datagram Protocol (ie,...

Claims

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Application Information

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IPC IPC(8): H04L1/24H04L12/56H04M7/00
Inventor 杨劲松傅群施健标焉勇
Owner VIMICRO CORP
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