发明名称 |
Methods and apparatuses for compressing digital image data |
摘要 |
Methods and apparatuses for compressing digital image data are described herein. In one embodiment, a wavelet transform is performed on each pixel of a frame to generate multiple wavelet coefficients representing each pixel in a frequency domain. The wavelet coefficients of a sub-band of the frame are iteratively encoded into a bit stream based on a target transmission rate, where the sub-band of the frame is obtained from a parent sub-band of a previous iteration. The encoded wavelet coefficients satisfy a predetermined threshold based on a predetermined algorithm while the wavelet coefficients that do not satisfy the predetermined threshold are ignored in the respective iteration. Other methods and apparatuses are also described.
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申请公布号 |
US7522774(B2) |
申请公布日期 |
2009.04.21 |
申请号 |
US20050077106 |
申请日期 |
2005.03.09 |
申请人 |
SINDHARA SUPERMEDIA, INC. |
发明人 |
RAMASASTRY JAYARAM;CHOUDHURY PARTHO;PRASAD RAMESH |
分类号 |
G06K9/36;H04N7/26 |
主分类号 |
G06K9/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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