Automatic Sound Signals Quality Estimation (3/4)
To Audio Codecs Quality Analyzer page
Applications: quality estimation of sound transmission through telephone network of general use
The picture represents applying the method described above for quality estimation of sound transmission through telephone network of general use. The given scheme is applicable both for local and for long-distance connections.
Server of sound quality estimation generates an initial signal (or chooses among signals prepared before) and transfers it to one of the telephone subscribers taking part in the testing. The subscriber received the signal establishes a standard connection with the second subscriber and reproduced the initial signal. The second subscriber records the receiving sound signal and transfers it to the sound quality estimation server.
The sound quality estimation server compares the initial and the test signals according to the suggested method and gives the quality estimation of the signal transferred through the telephone network. The received estimation can be used for improving the subscriber service, deciding about the necessity of equipment changing or setting (both on the side of the subscriber and on the station), as advertising and others.
Applications: quality estimation of sound transferred through IP-network
Similarly to telephone network quality estimation of sound transferred through IP-network is performed. It differs from the previous application in the way of transferring the initial and the signal under test from the sound quality estimation server to subscribers and in the way of data transfer between subscribers.
Quality estimations received can be used for choosing codecs used in VoIP-connection and when choosing operators, providing IP-telephony services.
Applications: sound quality estimation of cellular and satellite connection
The introduced method and software can be effectively used for quality estimation of cellular and satellite connections. Received estimations subscribers use for choosing operators and telephone models and operators use for optimization of base station locations.
Applications: quality estimation of systems and algorithms (methods) for sound data compression
Every codec version (or codec with a set of parameters) requires estimation and comparison with the analogs. Every developer can refer to sound sample base, compress and restore a signal and receive objective quality estimation of the codec work.
Such a system allows managing the codec developing process and the optimization of their parameters much more effectively. Ultimate consumer will be able to receive not just functioning, but optimal algorithm.
Applications: rooms’ sound quality estimation
In this case initial signal is a signal from the microphone located opposite the speaker and signals under test are those from microphones located in different parts of the room, in places where hearers and sound reproducing equipment are located.
The received estimations can be used for optimization of the location of sound reproducing equipment, furniture and spectators’ places.
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