Echo Perception in Wideband Telecommunication Scenarios – Comparison to E-model’s Narrowband Echo Findings
نویسندگان
چکیده
Talker echoes are one of the influencing factors which need to be addressed during migration of telecommunication towards wideband transmission. A recently carried out talking and listening test (TALT) focusing on wideband echo disturbances is introduced and the results are summarized. The E-Model, a planning tool for telecommunication networks, considers the degradation of the speech quality caused by narrowband echoes. The results of the wideband echo TALT were compared to ITU-T Recommendation G.131 and to the current modeling of narrowband echoes within the E-Model. The aim is to find out whether the E-Model is already capable to cover the degradation due to wideband echoes or whether it is necessary to update the E-Model in order to cover also wideband residual echoes.
منابع مشابه
Wideband Echo Perception
The migration of telecommunication towards wideband transmission may also introduce new types of degradations. This paper focuses on the influence of echoes. The different frequency content of un-cancelled residual echoes in wideband transmission, especially the signal energy in higher frequency ranges above 3 kHz, significantly changes the echo perception and echo disturbance compared to the n...
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