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Voice experience quality evaluation platform based on QoS (quality of service) and evaluation method

A technology of quality of experience and evaluation method, applied in the field of network communication, which can solve the problems of difficult QoS parameters, lack of stability of the experimental platform, and inability to meet the needs of QoE research.

Inactive Publication Date: 2011-04-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing network simulation software such as NIST Net and NS2 only focus on the research of the characteristics of the network itself, and there is no voice transmission and coding settings in such software, so these simulation software alone cannot meet the needs of QoE research
However, in the experiment of the influence of QoS on QoE based on the real network, it is difficult to accurately set the QoS parameters, which is not repeatable, and requires a lot of expensive equipment such as routers and switches, as well as related software and hardware support.
There are also some traditional experimental environments of this kind. The QoS damage to the source files is simulated by encoding the voice source files and covering them with silence. The process of simulating the whole process of voice transmission is less realistic and accurate
In addition, the above experimental environments did not consider the precise control of the waveform, volume, and recording mode of the terminal equipment, making the experimental platform lack of stability

Method used

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  • Voice experience quality evaluation platform based on QoS (quality of service) and evaluation method
  • Voice experience quality evaluation platform based on QoS (quality of service) and evaluation method
  • Voice experience quality evaluation platform based on QoS (quality of service) and evaluation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a QoS-based voice quality of experience (QoE) evaluation platform, such as figure 1 As shown, the platform mainly includes the following seven modules:

[0044] 1) a time synchronization module, used to realize the time synchronization between the voice sending end and the receiving end;

[0045] 2) The voice playback module is used to play a standard voice file using an audio player at the sending end to simulate call behavior;

[0046] 3) The voice transmission module is used to establish a voice transmission channel based on the network. This module is divided into two parts: one part is used to encode the voice signal at the sending end and transmit it to the network, and the other part is used to receive the network signal at the receiving end. Medium voice data, play the voice signal after decoding;

[0047] 4) The network simulation module is used to simulate the IP network environment and realize the simulation of network delay, jitter, ...

Embodiment 2

[0067] This embodiment adopts the QoS-based voice quality of experience (QoE) evaluation platform and evaluation method described in Embodiment 1 to evaluate the impact of packet loss (packet loss) on voice quality, and the specific evaluation steps are as follows:

[0068] Step A1, set the following parameters in NIST Net:

[0069] Delay: 50ms; Jitter: 0ms; Packet loss rate: 0%, 0.2%, 0.4%, ..., 3.6%, 3.8%, 4%;

[0070] Step B1, set the transmission protocol on Open Phone as RTP; encode G.711A-LAW; jitter buffer 40ms; voice packet size is 10ms, 20ms, 30ms, 40ms respectively;

[0071] Step C1, set volume in Power mixer to 25-35; waveform to 40-50; recording: 1-10;

[0072] Step D1 performs clock synchronization;

[0073] Step E1, set the audio file start playing time, set TI=15 seconds according to the size of the source file; number of cycles=10;

[0074] Steps F1, G1, H1, the sending end uses audio player software to play the voice source file, and the receiving end start...

Embodiment 3

[0077] This embodiment adopts the QoS-based voice quality of experience (QoE) evaluation platform and evaluation method described in Embodiment 1 to evaluate the impact of jitter (Jitter) on voice quality, and the specific evaluation steps are as follows:

[0078] Step A2, set the following parameters in NIST Net:

[0079] Delay is 50ms; packet loss rate is 0%; Jitter: 0ms, 2ms, 4ms, 6ms, 8ms, 12ms, 14ms, 16ms;

[0080] Step B2, set the transmission protocol in Open Phone as RTP; encode G.711A-LAW; the voice packet size is 20ms; the jitter buffer is 20ms, 40ms, 60ms, 80ms respectively;

[0081] Step C2, set volume in Power mixer to 25-35; waveform to 40-50; recording: 1-10;

[0082] Step D2 performs clock synchronization;

[0083] Step E2, set the audio file start playing time, set TI=15 seconds according to the size of the source file; number of cycles=10;

[0084] Steps F2, G2, H2, the sending end uses audio player software to play the voice source file, and the receiving...

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Abstract

The invention discloses a voice experience quality evaluation platform based on QoS (quality of service) and an evaluation method, and the evaluation method comprises the following steps: step one, a voice playing module adopts an audio player to play a voice source file, send voice signals and simulate pronunciation behaviors; step two, a first voice transmission module encodes the voice signalsand transmits the encoded voice signals to a network simulation module; step three, the network simulation module simulates an IP network environment so as to realize simulation of network parameters; step four, a second voice transmission module receives and decodes the voice signals transmitted by the network simulation module; step five, a voice recording module records and stores the decoded voice signals to form a voice target file and simulate audition behaviors; and step six, a voice quality evaluation module evaluates and detects the experience quality of the voice target file transmitted by the network simulation module. In the invention, the overall transmission process of voice signals from a mouth to ears can be simulated, thus having better authenticity, safety, accuracy and repeatability.

Description

technical field [0001] The invention belongs to the technical field of network communication, and relates to a QoS-based voice experience quality evaluation platform and evaluation method. Background technique [0002] As the audio service becomes one of the mainstream services of the IP network, an important index to measure whether the quality of an audio service meets user requirements is Quality of Experience (QoE). QoE is the evaluation of service performance from the user's point of view, and it is the end-to-end service quality that users can perceive. Compared with other factors, network transmission is the main reason that affects QoE, so analyzing and researching the impact of network transmission on QoE is a problem that needs to be solved urgently. Obviously, QoE and network quality of service (Quality of Service, QoS) are not only related but also have differences in objects and perspectives. By studying the relationship between QoS and QoE, the mapping relatio...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08G10L19/00G10L11/00G10L25/00
Inventor 张大陆胡治国陈志伟张起强
Owner TONGJI UNIV
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