Method and device for testing speech quality

Abstract

The method includes following steps: a) the testing front stage uses preset reference sound file to generate sound data; the sound data is sent to mobile terminal, and is fed back to the testing front stage from mobile terminal via loop back; b) the testing front stage makes separation and extraction for the received feedback sound data to form degrading sound data file; c) with the reference sound file and the degrading sound file, estimation and calculation is made for the sound quality to acquire the quality of sound loaded by tested system. The invention also discloses a device for testing sound quality consists of operating unit, front and back stage communication unit, data generating unit, sendreceive control unit, reception extracting unit, and estimation and calculation unit.

Description

technical field [0001] The invention relates to a mobile communication system, in particular to a method and device for testing voice quality in the mobile communication system. Background technique [0002] With the continuous maturity of the mobile communication technology, voice bearer on the mobile communication network has been more and more widely used. by figure 1 For example, various media gateways (MG), session initiation protocol (SIP) terminals, H.323 protocol terminals, H.248 terminals, and various telephones (such as analog telephones) are directly or indirectly connected to the mobile communication network, using mobile communication The network transmits multimedia data, such as voice transmission, that is, encodes the user's voice signal into a voice frame that can be transmitted on the mobile communication network in the format of AMR and EVRC, and also encodes the voice of AMR and EVRC on the mobile communication network. Frames are decoded into speech si...

AI Technical Summary

Problems solved by technology

The main shortcoming of described method is: 1, can only be tested to the equipment that provides Z interface, and its test result has included the impact of all network components on voice quality, can't locate the concrete component that has impact on voice quality; The quality and effect of the voice carried by the mobile communication network cannot be effectively evaluated; 2. Since the test needs to be performed through the analog phone port of the terminal, the test equipment must also have an analog phone interface; the voice files used for the test are not analog signals, but The digital signal encoded by a certain algorithm is stored on the computer, so special hardware equipment is required to realize the sending, receiving, sampling encoding, etc. of voice files; the cost is very high, and if the test is carried out in different places, two devices are required, which is more expensive ; 3. Only end-to-end testing can be carried out, and the impact on the voice quality of individual components cannot be evaluated. 4. It is inconvenient to test and monitor the communication network for a long time

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