Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion – With content reduction encoding
Reexamination Certificate
2005-03-10
2010-02-09
Chawan, Vijay B (Department: 2626)
Data processing: speech signal processing, linguistics, language
Audio signal bandwidth compression or expansion
With content reduction encoding
C704S230000, C704S500000, C704S200100, C704S219000, C704S229000, C341S051000, C341S107000, C375S240110, C375S240240, C375S240000
Reexamination Certificate
active
07660720
ABSTRACT:
A lossless audio coding and/or decoding method and apparatus are provided. The coding method includes: mapping the audio signal in the frequency domain having an integer value into a bit-plane signal with respect to the frequency; obtaining a most significant bit and a Golomb parameter for each bit-plane; selecting a binary sample on a bit-plane to be coded in the order from the most significant bit to the least significant bit and from a lower frequency component to a higher frequency component; calculating the context of the selected binary sample by using significances of already coded bit-planes for each of a plurality of frequency lines existing in the vicinity of a frequency line to which the selected binary sample belongs; selecting a probability model by using the obtained Golomb parameter and the calculated contexts; and lossless-coding the binary sample by using the selected probability model. According to the method and apparatus, a compression ratio better than that of the bit-plane Golomb code (BPGC) is provided through context-based coding method having optimal performance.
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Kim Jung-hoe
Kim Sang-wook
Lee Shi-hwa
Lei Miao
Oh Ennmi
Chawan Vijay B
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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