公开(公告)号：US20090257493A1

公开(公告)日：2009-10-15

申请号：US12420270

申请日：2009-04-08

申请人： Yan Ye ,  Martha Karczewicz

发明人： Yan Ye ,  Martha Karczewicz

IPC分类号： H04N7/32

CPC分类号： H04N7/364 ,  H04N7/014 ,  H04N19/117 ,  H04N19/136 ,  H04N19/147 ,  H04N19/182 ,  H04N19/192 ,  H04N19/463 ,  H04N19/523

摘要： This disclosure describes filtering techniques applied by an encoder and a decoder during the prediction stage of a video encoding and/or decoding process. The filtering techniques may enhance the accuracy of predictive data used during fractional interpolation, and may improve predictive data of integer blocks of pixels. There are several aspects to this disclosure, including a useful twelve-pixel filter support that may be used for interpolation, techniques that use coefficient symmetry and pixel symmetry to reduce the amount of data needed to be sent between an encoder and a decoder to configure the filter support for interpolation, and techniques for filtering data at integer pixel locations in a manner that is similar to sub-pixel interpolation. Other aspects of this disclosure concern techniques for encoding information in the bitstream to convey the type of filter used, and possibly the filter coefficients used. Predictive coding of filter coefficients is also described.

摘要翻译： 本公开描述了在视频编码和/或解码过程的预测阶段期间由编码器和解码器应用的滤波技术。 滤波技术可以增强在分数插值期间使用的预测数据的精度，并且可以改善整数像素块的预测数据。 本公开的方面有几个方面，包括可用于插值的有用的十二像素滤波器支持，使用系数对称性和像素对称性的技术来减少在编码器和解码器之间发送的数据量以配置 用于内插的滤波器支持，以及以类似于子像素插值的方式在整数像素位置处对数据进行滤波的技术。 本公开的其它方面涉及用于对位流中的信息进行编码以传送所使用的滤波器的类型以及可能使用的滤波器系数的技术。 还描述了滤波器系数的预测编码。