Invention Grant
US09077965B2 Method and apparatus for performing lossy image compression through source quantization and lossless compression kernel, and related method and apparatus for image decompression
有权
用于通过源量化和无损压缩内核执行有损图像压缩的方法和装置，以及用于图像解压缩的相关方法和装置
- Patent Title: Method and apparatus for performing lossy image compression through source quantization and lossless compression kernel, and related method and apparatus for image decompression
- Patent Title (中): 用于通过源量化和无损压缩内核执行有损图像压缩的方法和装置，以及用于图像解压缩的相关方法和装置
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Application No.: US14049229Application Date: 2013-10-09
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Publication No.: US09077965B2Publication Date: 2015-07-07
- Inventor: Tung-Hsing Wu , Han-Liang Chou , Kun-Bin Lee , Chi-Cheng Ju
- Applicant: MEDIATEK INC.
- Applicant Address: TW Science-Based Industrial Park, Hsin-Chu
- Assignee: MEDIATEK INC.
- Current Assignee: MEDIATEK INC.
- Current Assignee Address: TW Science-Based Industrial Park, Hsin-Chu
- Agent Winston Hsu; Scott Margo
- Main IPC: G06K9/36
- IPC: G06K9/36 ; H04N19/194 ; H04N19/176 ; H04N19/124 ; H04N19/127 ; H04N19/146
Abstract:
An image compression method has at least the following steps: receiving source pixel data of a plurality of blocks of a frame; when a lossless compression mode is enabled for the frame, bypassing a source quantization operation and applying a lossless compression kernel to source pixel data of each of the blocks; and when a lossy compression mode is enabled for the frame, applying the source quantization operation to the source pixel data of each of the blocks to generate input pixel data of each of the blocks, and applying the lossless compression kernel to the input pixel data of each of the blocks. For example, the source quantization operation employs an adaptive quantization parameter for each of the blocks such that a size of compressed data of the frame generated under the lossy compression mode does not exceed a bit budget.
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