Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1998-05-06
2000-09-26
Chin, Stephen
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
375265, 375341, 714792, 714794, 714795, H04L 2302
Patent
active
061251496
ABSTRACT:
A trellis quantizer that produces an output sequence adapted for successively refinable decoded approximation employs a multi-level trellis graph. At any given level a next refinement level is obtained by replacing each transition of the trellis graph at the given level with a trellis graph. The codevectors of the refined trellis quantizer can be optimized for all levels of refinements by an iterative process that assesses the distortions resulting from modifying the codevectors. The optimizing is carried out concurrently for all levels of refinement, achieving thereby a quantizer that is optimized for whatever level of refinement the quantizer is asked to carry out. This optimization takes into account the probability distribution of incoming signal levels.
REFERENCES:
patent: 5162812 (1992-11-01), Aman et al.
patent: 5185747 (1993-02-01), Farahati
patent: 5586128 (1996-12-01), Chen
patent: 5812602 (1998-09-01), Hamblet
H. A. Aksu and M. Salehi, "Multi-Stage Trellis Coded Quantization (MSTCQ)," Proc. Conf. Inform. Sciences & Systems, Baltimore, Maryland, Mar. 1995.
M. W. Marcellin and T. R. Rischer, "Trellis Coded Quantization of Memoryless and Gauss-Markov Sources," IEEE Trans. on Communications, vol. 38, No. 1, Jan. 1990, pp. 82-93.
P. J. Sementilli et al., "Progressive Transmission in Trellis Coded Quantization-Based Image Coders," Conf. Image Processing, Santa Barbara, California, Oct. 1997.
H. Jafarkhani et al., "Entropy-Constrained Successively Refinable Scalar Quantization," Proc. IEEE Data Compression Conference, Mar. 1997, pp. 337-346.
V. A. Vaishampayan, "Design of Multiple Description Scalar Quantizers," IEEE Trans. on Information Theory, vol. 39, No. 3, May 1993; pp. 821-834.
V. A. Vaishampayan and J. Domaszewicz, "Design of Entropy-Constrained Multiple-Description Scalar Quantizers," IEEE Trans. on Information Theory, vol. 40, No. 1, Jan. 1994, pp. 245-250.
Jafarkhani Hamid
Tarokh Vahid
AT&T Corp.
Chin Stephen
Ha Dac V.
LandOfFree
Successively refinable trellis coded quantization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Successively refinable trellis coded quantization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Successively refinable trellis coded quantization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2106568