发明授权
- 专利标题: Efficient visually lossless compression
- 专利标题(中): 高效视觉无损压缩
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申请号: US14134285申请日: 2013-12-19
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公开(公告)号: US09135723B1公开(公告)日: 2015-09-15
- 发明人: Zhiying Guo , Yun Gong , Dam LeQuang
- 申请人: MARVELL INTERNATIONAL LTD.
- 申请人地址: BM
- 专利权人: MARVELL INTERNATIONAL LTD.
- 当前专利权人: MARVELL INTERNATIONAL LTD.
- 当前专利权人地址: BM
- 主分类号: G06K9/36
- IPC分类号: G06K9/36 ; G06T9/00 ; H04N19/146 ; H04N19/124
摘要:
Systems, methods, and other embodiments associated with efficient visually lossless compression are described. According to one embodiment, an apparatus includes a transform logic configured to receive image data divided into segments and generate a matrix of transform coefficients corresponding to a segment. The apparatus also includes a rate control logic configured to select (i) a set of quantization levels from a plurality of sets of quantization levels and (ii) a quantization level from the selected set of quantization levels based, at least in part, on a desired visual quality. Each set of quantization levels corresponds to a different target compression ratio for the image data. The apparatus further includes a quantization logic configured to quantize the matrix of transform coefficients according to the selected quantization level to produce an array of integers. The apparatus also includes an encoding logic configured to encode the array of integers as a bit stream.
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