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    • 2. 发明专利
    • Interpolation filter support for sub-pixel resolution in video coding
    • 内插滤波器支持视频编码中的子像素分辨率
    • JP2014057333A
    • 2014-03-27
    • JP2013217909
    • 2013-10-18
    • Qualcomm Incorporatedクゥアルコム・インコーポレイテッドQualcomm Incorporated
    • YE YANMARTA KARCZEWICZ
    • H04N19/50
    • H04N7/364H04N7/014H04N19/117H04N19/136H04N19/147H04N19/182H04N19/192H04N19/463H04N19/523
    • PROBLEM TO BE SOLVED: To provide filtering techniques applied by an encoder and a decoder during a prediction stage of a video encoding and/or decoding process.SOLUTION: The filtering techniques may enhance the accuracy of predictive data used during fractional interpolation, and may improve predictive data of integer blocks of pixels. The present invention includes 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 concern techniques for encoding information in a bitstream to convey the type of filter used, and optionally the filter coefficients used. Predictive coding of filter coefficients is also described.
    • 要解决的问题:在视频编码和/或解码过程的预测阶段期间提供由编码器和解码器应用的滤波技术。解决方案: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。 本发明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编码器和解码器之间需要发送的数据量以配置用于插值的滤波器支持, 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。 其他方面涉及用于在比特流中编码信息以传送所使用的滤波器的类型以及可选地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。