专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明申请

WO2010144408A1 DIGITAL IMAGE COMPRESSION BY ADAPTIVE MACROBLOCK RESOLUTION CODING 审中-公开
标题翻译：数字图像压缩自适应宏块解码编码
公开(公告)号：WO2010144408A1
公开(公告)日：2010-12-16
申请号：PCT/US2010/037722
申请日：2010-06-08
申请人： MOTOROLA MOBILITY, INC. , USLUBAS, Serhan , KATSAGGELOS, Aggelos K. , ISHTIAQ, Faisal , HSIANG, Shih-Ta , MAANI, Ehsan
发明人： USLUBAS, Serhan , KATSAGGELOS, Aggelos K. , ISHTIAQ, Faisal , HSIANG, Shih-Ta , MAANI, Ehsan
IPC分类号： H04N7/26 , H04N7/46 , H04N7/50
CPC分类号： H04N19/59 , H04N19/132 , H04N19/147 , H04N19/176 , H04N19/182 , H04N19/19 , H04N19/33 , H04N19/46 , H04N19/61
摘要： Disclosed is an image encoder that divides (1000) a digital image into a set of "macroblocks." If appropriate, a macroblock is "downsampled" (1004) to a lower resolution. The lower-resolution macroblock is then encoded by applying spatial (and possibly temporal) prediction (1006). The "residual" of the macroblock is calculated (1010) as the difference between the predicted and actual contents of the macroblock. The low-resolution residual is then either transmitted to an image decoder or stored for later use (1010). In some embodiments, the encoder calculates (1008) the rate-distortion costs of encoding the original-resolution macroblock and the lower-resolution macroblock and then only encodes (1010) the lower-resolution macroblock if its cost is lower. When a decoder receives (1104) a lower-resolution residual, it recovers the lower-resolution macroblock using standard prediction techniques (1106). Then, the macroblock is "upsampled" (1110) to its original resolution by interpolating the values left out by the encoder. The macroblocks are then joined (1114) to form the original digital image.
摘要翻译：公开了一种图像编码器，其将（1000）数字图像划分为一组“宏块”。如果合适，则将宏块“下采样”（1004）降低到较低的分辨率。然后通过应用空间（和可能的时间）预测（1006）来对低分辨率宏块进行编码。计算宏块的“残差”（1010）作为宏块的预测和实际内容之间的差。然后将低分辨率残差传送到图像解码器或存储以供稍后使用（1010）。在一些实施例中，编码器计算（1008）编码原始分辨率宏块和较低分辨率宏块的速率失真成本，然后仅在低成本较低分辨率宏块编码（1010）低分辨率宏块。当解码器接收（1104）较低分辨率残差时，它使用标准预测技术（1106）来恢复较低分辨率的宏块。然后，通过内插编码器剩下的值，将宏块“上采样”（1110）到其原始分辨率。然后将宏块连接（1114）以形成原始数字图像。

IPRDB

热门服务

关于我们

友情链接

联系方式