发明名称 |
Lossless audio coding/decoding method and apparatus |
摘要 |
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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申请公布号 |
EP1575032(A2) |
申请公布日期 |
2005.09.14 |
申请号 |
EP20050251452 |
申请日期 |
2005.03.10 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
ENNMI, OH;KIM, JUNGHOE;LEI, MIAO;LEE, SHIHWA;KIM, SANGWOOK |
分类号 |
H03M7/30;G10L19/00;G10L19/02;H03M7/40;(IPC1-7):G10L19/00 |
主分类号 |
H03M7/30 |
代理机构 |
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主权项 |
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地址 |
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