Abstract
New quantization method based on magnitude-sign split scheme for bandwidth scalable wideband speech codec is proposed. In the high-band codec, the signal is band-pass filtered and each band is transformed independently into DCT domain. The DCT coefficients are split into magnitude and sign, and each is quantized separately based on its unique characteristics. In addition, the quantized gain parameter in the low-band codec is utilized in the high-band codec for an enhanced performance. The 19.8kbps bandwidth scalable wideband codec consisting of G.729E for low-band and the proposed codec for high-band is developed, and it is confirmed that the proposed codec has better subjective performance than 24kbps G.722.1.
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References
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© 2005 Springer-Verlag Berlin Heidelberg
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You, JH., Park, CM., Lee, JI., Ahn, CB., Oh, SJ., Park, H. (2005). Magnitude-Sign Split Quantization for Bandwidth Scalable Wideband Speech Codec. In: Ho, YS., Kim, H.J. (eds) Advances in Multimedia Information Processing - PCM 2005. PCM 2005. Lecture Notes in Computer Science, vol 3767. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11581772_43
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DOI: https://doi.org/10.1007/11581772_43
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-30027-4
Online ISBN: 978-3-540-32130-9
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