Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion
Reexamination Certificate
2004-12-15
2010-10-05
Smits, Talivaldis Ivars (Department: 2626)
Data processing: speech signal processing, linguistics, language
Audio signal bandwidth compression or expansion
C704S230000, C704S239000, C704S501000
Reexamination Certificate
active
07809579
ABSTRACT:
Polyphonic signals are used to create a main signal, typically a mono signal, and a side signal. A number of encoding schemes for the side signal are provided. Each encoding scheme is characterized by a set of sub-frames of different lengths. The total length of the sub-frames corresponds to the length of the encoding frame of the encoding scheme. The encoding scheme to be used on the side signal is selected dependent on the present signal content of the polyphonic signals. In a preferred embodiment, a side residual signal is created as the difference between the side signal and the main signal scaled with a balance factor. The balance factor is selected to minimize the side residual signal. The optimized side residual signal and the balance factor are encoded and provided as encoding parameters representing the side signal.
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Bruhn Stefan
Enström Daniel
Johansson Ingemar
Taleb Anisse
Baker Matthew H
Nixon & Vanderhye P.C.
Smits Talivaldis Ivars
Telefonaktiebolaget LM Ericsson (publ)
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