N2 - In building speech recognition based applications, robustness to different noisy background condition is an important challenge. In this paper bimodal approach is proposed to improve the robustness of Hindi speech recognition system. Also an importance of different types of visual features is studied for audio visual automatic speech recognition (AVASR) system under diverse noisy audio conditions. Four sets of visual feature based on Two-Dimensional Discrete Cosine Transform feature (2D-DCT), Principal Component Analysis (PCA), Two-Dimensional Discrete Wavelet Transform followed by DCT (2D-DWT- DCT) and Two-Dimensional Discrete Wavelet Transform followed by PCA (2D-DWT-PCA) are reported. The audio features are extracted using Mel Frequency Cepstral coefficients (MFCC) followed by static and dynamic feature. Overall, 48 features, i.e. 39 audio features and 9 visual features are used for measuring the performance of the AVASR system. Also, the performance of the AVASR using noisy speech signal generated by using NOISEX database is evaluated for different Signal to Noise ratio (SNR: 30 dB to −10 dB) using Aligarh Muslim University Audio Visual (AMUAV) Hindi corpus. AMUAV corpus is Hindi continuous speech high quality audio visual databases of Hindi sentences spoken by different subjects. L1 - http://journals.pan.pl/Content/101422/PDF/17_paper.pdf L2 - http://journals.pan.pl/Content/101422 PY - 2015 IS - No 4 EP - 619 DO - 10.1515/aoa-2015-0061 KW - Aligarh Muslim University audio visual corpus KW - AVASR KW - bimodal KW - DCT KW - DWT A1 - Upadhyaya, Prashant A1 - Farooq, Omar A1 - Abidi, M.R. A1 - Varshney, Priyanka PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 40 DA - 2015[2015.01.01 AD - 2015.12.31 AD] T1 - Comparative Study of Visual Feature for Bimodal Hindi Speech Recognition SP - 609 UR - http://journals.pan.pl/dlibra/publication/edition/101422 T2 - Archives of Acoustics