Results 281 to 290 of about 251,049 (300)
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Adaptive sub-band DCT coding for HDTV signal transmission
Signal Processing: Image Communication, 1990Abstract This paper presents an adaptive sub-band DCT coding for high-quality HDTV signal transmission. In the coder, the first stage quadrature mirror filters (QMFs) decompose the input signal into two bands in the horizontal direction, while the second stage filters decompose the two bands into four bands in the vertical direction.
Kazunari Irie, Ryozo Kishimoto
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Sub-Band Coding Of Images Using Nonrectangular Filter Banks
SPIE Proceedings, 1988A procedure for image coding using a non-rectangular subband decomposition is described in this paper. The procedure provides a hierarchical partition where at each stage a decomposition into two subbands is accomplished with no bias toward either the horizontal or the vertical high frequency content of the signal.
Rashid Ansari, A.Enis Cetin, Sang H. Lee
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Sub-band coding of audio using recursively indexed quantization
Proceedings of 1995 Workshop on Applications of Signal Processing to Audio and Accoustics, 2002A low-complexity audio data compression technique using sub-band coding (SBC) and a recursively indexed quantizer (RIQ) is proposed. The characteristics of the proposed system are investigated and several relevant implementation issues are described. The objective performance of the proposed system is compared to conventional coding techniques.
null Yang-Jeng Chen, R.C. Maher
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A sub-band coder designed for combined source and channel coding (speech coding)
ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003The coder is a dynamic bit allocation sub-band coder of the type first proposed by Ramstad (1982). It is structured in such a way that the relative importance of all bits is established as a byproduct of the dynamic bit allocation. It is shown that there is a difference in error sensitivity of four orders of magnitude between the most and the least ...
R.V. Cox +3 more
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IEEE Transactions on Image Processing, 1992
The authors consider the encoding of image subbands with a tree code that is asymptotically optimal for Gaussian sources and the mean squared error (MSE) distortion measure. They first prove that optimal encoding of ideally filtered subbands of a Gaussian image source achieves the rate distortion bound for the MSE distortion measure.
S, Nanda, W A, Pearlman
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The authors consider the encoding of image subbands with a tree code that is asymptotically optimal for Gaussian sources and the mean squared error (MSE) distortion measure. They first prove that optimal encoding of ideally filtered subbands of a Gaussian image source achieves the rate distortion bound for the MSE distortion measure.
S, Nanda, W A, Pearlman
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Coding of unquantized spectrum sub-bands in superwideband audio codecs
2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2011We present several new methods for coding of spectrum coefficients in embedded audio codecs. In audio codecs, the spectrum is often divided in sub-bands, and quantized using a vector quantization. In many applications, the limited bit-budget allocated to the vector quantization is not sufficient to cover all the sub-bands, and the distortion of the ...
Vaclav Eksler, Milan Jelinek
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Temporal domain sub-band video coding with motion compensation
[Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, 1992Temporal domain subband coding with motion compensation (MC-SBC) is a new technique of interframe data compression in video coding applications. Perfect reconstruction is possible with one-pixel accuracy for motion parameters and a trivial first-order quadrature mirror filter (QMF).
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A hybrid sub-band sinusoidal coding scheme
7th European Conference on Speech Communication and Technology (Eurospeech 2001), 2001Ho, M.S, Molyneux, D.J, Cheetham, Barry
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Transformed sub-band coding of speech using vector quantization
European Conference on Speech Technology, 1987H. A. Kaouri, J. V. McCanny
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Sub-band coding of the discrete cosine transform in ECG compression
, 2005 V.A. Allen, J. Belina
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