Lost frame recovering method and equipment as well as speech enhancing method, equipment and system

A voice enhancement and recovery method technology, applied in the field of communication, can solve the problems of increasing system resource consumption, multi-system resource memory usage, CPU usage, etc., to achieve the effect of reducing system resource consumption and improving quality

Inactive Publication Date: 2010-11-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Because the prior art needs to decode relevant frames earlier when performing frame recovery, and then recover according to the waveform of the decoded relevant frames; and the decoding process often needs to consume more system resources (such as memory usage, CPU usage rate, etc.) etc.), therefore, if the network conditions are poor and there are many frame data to be recovered, multiple decoding operations need to be performed, which greatly increases the consumption of system resources

Method used

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  • Lost frame recovering method and equipment as well as speech enhancing method, equipment and system
  • Lost frame recovering method and equipment as well as speech enhancing method, equipment and system
  • Lost frame recovering method and equipment as well as speech enhancing method, equipment and system

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Embodiment 1

[0059] Embodiment 1 of the present invention provides a speech enhancement method, see figure 2, is a flow diagram of an embodiment of the present invention. After receiving the code stream, first determine the type of the missing frame according to the type of the adjacent frame, and then use the characteristic parameters obtained after deparameterizing the adjacent frames to construct the characteristics of the missing frame parameters, and finally encode the characteristic parameters of the constructed lost frame to restore the lost frame. Since the embodiment of the present invention restores the lost frame by obtaining the characteristic parameters after solving the parameters, it can be regarded as a restoration process in the "parameter domain". Specifically, see image 3 , the embodiment of the present invention includes the following steps:

[0060] S101. Determine the type of the lost frame according to the type of the adjacent frame adjacent to the lost frame;

...

Embodiment 2

[0086] Based on the first embodiment above, the embodiment of the present invention provides a speech enhancement method based on different working modes. In order to meet the requirements for transmission quality and delay in practical applications, when it is determined that there is a lost frame and the lost frame needs to be recovered, By entering different modes to deal with different practical application scenarios.

[0087] The system here refers to the system that has applied the voice enhancement technology of the embodiment of the present invention; in this system, in order to prevent network jitter (Jitter), a jitter buffer (Jitter Buffer) may be set up, by buffering a certain amount of frames, and performing Reordering to prevent jitter, through the setting of the jitter buffer, makes the transmission more stable and improves the transmission quality, but on the other hand it will cause delay.

[0088] When the system provides a Jitter Buffer, it can also be obtain...

Embodiment 3

[0104] The embodiment of the present invention is based on the above embodiment, taking the system adopting AMR-NB (Adaptive Multi-RateNarrow-Band, Adaptive Multi-Rate Narrow-Band) coding as an example to describe the speech enhancement technology in detail, see Figure 5 , including the following steps:

[0105] S301. Obtain frame data;

[0106] Obtaining the frame data can be obtained by directly obtaining the frame data processed by the front end, or by adding a receiving unit at the local end by analyzing the data packets (Packet) transmitted by the network. In practical applications, in order to adapt to various network transmission protocols, the encoded frames will be packaged according to the network transmission type (such as IP packets, RTP packets, etc.). In the form of packets, the loss of frames is relatively small, which can improve the reliability of transmission; in some application scenarios that need to transmit multiple channels of data, a packet may also c...

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Abstract

The embodiment of the invention discloses lost frame recovering method and equipment as well as speech enhancing method, equipment and system, wherein the lost frame recovering method comprises the following steps of: determining the type of a lost frame according to the type of an adjacent frame adjacent to the lost frame; obtaining a characteristic parameter obtained after unlocking the parameter of the adjacent frame, wherein the characteristic parameter is used for determining the characteristic information of coded data in the frame; constructing the characteristic parameter conforming to the type of the lost frame according to the correlation between the characteristic parameter of the adjacent frame and the characteristic information of the coded data in each frame; and recovering the lost frame according to the constructed characteristic parameter of the lost frame. Through the method, the lost frame recovery of a parameter domain can be realized, and system resources consumed in the recovering process are reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a frame loss recovery method, equipment and a voice enhancement method, equipment and system. Background technique [0002] Voice transmission has a wide range of applications in the field of communication, a common voice transmission system such as figure 1 Shown: the original voice data (analog signal) is sampled to obtain a waveform signal (digital signal) based on the sample point value, and then encoded to form a code stream with the frame as the basic unit, and through the corresponding transmission network (such as IP network, TFO network) for transmission. Due to the constraints of various network environment factors, there will be phenomena such as network congestion and jitter, resulting in frame loss, which will affect the voice quality. [0003] In order to achieve speech enhancement (i.e. improve speech quality), the prior art generally adopts a line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L21/02
Inventor 张梦晗李玉龙张德明覃景繁
Owner HUAWEI TECH CO LTD
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