Pulse or digital communications – Pulse code modulation
Reexamination Certificate
2006-11-14
2006-11-14
Tran, Khai (Department: 2611)
Pulse or digital communications
Pulse code modulation
C370S203000, C370S429000, C382S128000
Reexamination Certificate
active
07136418
ABSTRACT:
A method and system for encoding and decoding an input signal in relation to the most perceptually relevant aspects of the input signal. A two-dimensional (2D) transform is applied to the input signal to produce a magnitude matrix and a phase matrix that can be inverse quantized by a decoder. A first column of coefficients of the magnitude matrix represents a mean spectral density (MSD) function of the input signal. Relevant aspects of the MSD function are encoded at a beginning of a data packet. The MSD function is also processed through a core perception model to determine bit allocation. The matrices are then quantized and priority ordered into a data packet, with the least perceptually relevant information at the end of the packet so that it may be ignored or truncated for scalability to the channel data rate capacity.
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Atlas Les E.
Vinton Mark S.
Anderson Ronald M.
Tran Khai
University of Washington
Ware Cicely
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