Graduate School and Research Center in Digital Sciences

Automatic speech recognition and speech variability: A review

Benzeghiba, Mohamed;De Mori, R;Deroo, O;Erbes, T;Jouvet, D;Fissore, L; Laface, P;Mertins, A;Ris, C;Rose, R;Tyagi, Vivek;Wellekens, Christian J

Speech Communication, Volume 49, Issues 10-11, October-November 2007

Major progress is being recorded regularly on both the technology and exploitation of automatic speech recognition (ASR) and spoken language systems. However, there are still technological barriers to flexible solutions and user satisfaction under some circumstances. This is related to several factors, such as the sensitivity to the environment (background noise), or the weak representation of grammatical and semantic knowledge. Current research is also emphasizing deficiencies in dealing with variation naturally present in speech. For instance, the lack of robustness to foreign accents precludes the use by specific populations. Also, some applications, like directory assistance, particularly stress the core recognition technology due to the very high active vocabulary (application perplexity). There are actually many factors affecting the speech realization: regional, sociolinguistic, or related to the environment or the speaker herself. These create a wide range of variations that may not be modeled correctly (speaker, gender, speaking rate, vocal effort, regional accent, speaking style, non-stationarity, etc.), especially when resources for system training are scarce. This paper outlines current advances related to these topics.

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Title:Automatic speech recognition and speech variability: A review
Keywords:Speech recognition;Speech analysis; Speech modeling; Speech intrinsic variations
Department:Digital Security
Eurecom ref:2363
Copyright: © Elsevier. Personal use of this material is permitted. The definitive version of this paper was published in Speech Communication, Volume 49, Issues 10-11, October-November 2007 and is available at :
Bibtex: @article{EURECOM+2363, doi = {}, year = {2007}, month = {10}, title = {{A}utomatic speech recognition and speech variability: {A} review}, author = {{B}enzeghiba, {M}ohamed and {D}e {M}ori, {R} and {D}eroo, {O} and {E}rbes, {T} and {J}ouvet, {D} and {F}issore, {L} and {L}aface, {P} and {M}ertins, {A} and {R}is, {C} and {R}ose, {R} and {T}yagi, {V}ivek and {W}ellekens, {C}hristian {J}}, journal = {{S}peech {C}ommunication, {V}olume 49, {I}ssues 10-11, {O}ctober-{N}ovember 2007}, url = {} }
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