Data compression and expansion of an audio signal

Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion

Reexamination Certificate

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Details

C341S065000, C341S143000

Reexamination Certificate

active

10872844

ABSTRACT:
A data compression apparatus for data compressing an audio signal includes an input terminal (1) for receiving the audio signal, a 1-bit A/D converter (4) for A/D converting the audio signal so as to obtain a bitstream signal, a lossless coder (10) for carrying out a lossless data compression step on the bitstream signal so as to obtain a data-compressed bitstream signal, and an output terminal (14) for supplying the data-compressed bitstream signal.

REFERENCES:
patent: 3913016 (1975-10-01), Candy
patent: 3925731 (1975-12-01), Brainard et al.
patent: 4546342 (1985-10-01), Weaver et al.
patent: 4754483 (1988-06-01), Weaver
patent: 5023611 (1991-06-01), Chamzas et al.
patent: 5220568 (1993-06-01), Howe et al.
patent: 5224087 (1993-06-01), Maeda et al.
patent: 5323396 (1994-06-01), Lokhoff
patent: 5381145 (1995-01-01), Allen et al.
patent: 5530655 (1996-06-01), Lokhoff et al.
patent: 5539829 (1996-07-01), Lokhoff et al.
patent: 5606618 (1997-02-01), Lokhoff et al.
patent: 5742930 (1998-04-01), Howitt
patent: 5777992 (1998-07-01), Lokhoff
patent: 6269338 (2001-07-01), Bruekers et al.
patent: 6289306 (2001-09-01), Van Der Vleuten et al.
patent: 6535845 (2003-03-01), Van Der Vleuten et al.
patent: 6691086 (2004-02-01), Lokhoff et al.
patent: 6778965 (2004-08-01), Bruekers et al.
patent: 7107212 (2006-09-01), Van Der Vleuten et al.
L. Risbo, “Improved Stability and Performance from Signal-Delta Modulators using 1-bit Vector Quantization,” IEEE International Symposium on Circuits and Systems, 1993. ISCAS '93, May 3-6, 1993, pp. 1365 to 1368.
Wikipedia, “Huffman coding”, 6 pages, Jul. 20, 2006.

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