Method and device for testing speech quality

Abstract

This invention provides a method for testing phonetic quality in which, a calling terminal in a tested network segment of IP network utilizes the IP address parameters of the calling and the called end to deliver reference phonetic documents to the called terminal, the called end utilizes the IP address parameters of the calling and called ends to receive the step down phonetic document formed at the local end transferred by the tested network section finally, the reference and step down phonetic documents are used to evaluate the phonetic quality to get the load phonetic quality of the tested network section. This invention provides the test device including: a user interface module, an outboard interface module, a delivery module a receive module, a file forward module and PESQ computing module.

Description

technical field [0001] The invention relates to a test method of a communication network, in particular to a method and device for testing voice quality applied to an IP network. Background technique [0002] With the continuous maturity of the Next Generation Network (NGN) technology, the voice bearer on the IP 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 are directly or indirectly connected to IP networks, and use IP networks to transmit multimedia data. For example, the transmission of voice is to encode the user's voice signal into a voice frame that can be transmitted on IP in the format of G.711 protocol, G.729 protocol or G.723.1 protocol. At the same time, G.711 on the IP network, G.729 or G.723.1 speech frames are decoded into speech signals. In order to better transmit voice signals, it is usually nec...

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are; 1. It can only be used for devices that provide Z interfaces. The test results include the impact of all network components on voice quality, and cannot locate specific components that affect voice quality; MG's pure IP network bears the voice quality and effect to effectively evaluate, so it cannot provide a basis for whether equipment such as H.323 terminals can be used on the IP network; The test equipment must also have an analog telephone interface; the voice files used in the test are not analog signals, but digital signals encoded by a certain algorithm stored on the computer, so special hardware equipment is required to realize the sending, receiving and sampling of voice files Coding, etc.; the cost is very high. If the test is carried out in different places, two devices are needed, which is more expensive; 3. Only end-to-end test can be carried out, and the impact of a single component such as a TMG on voice quality cannot be evaluated.

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