公开(公告)号：US20130034149A1

公开(公告)日：2013-02-07

申请号：US13198588

申请日：2011-08-04

申请人： Venkata Naga Poleswara Rao Karuchula ,  Ashish Bajaj ,  Surya Manikya Phanindra Kalanadhabhatla ,  Praneeth Paladugu ,  Aditya Bhuvanagiri

发明人： Venkata Naga Poleswara Rao Karuchula ,  Ashish Bajaj ,  Surya Manikya Phanindra Kalanadhabhatla ,  Praneeth Paladugu ,  Aditya Bhuvanagiri

IPC分类号： H04N7/50

CPC分类号： H04N7/50 ,  H04N11/04 ,  H04N19/103 ,  H04N19/124 ,  H04N19/134 ,  H04N19/136 ,  H04N19/176 ,  H04N19/61

摘要： This disclosure relates to techniques for preventing or reducing the appearance of undesirable color and/or gray patches in decoded video sequences due to generation of out-of-bound quantized transform coefficients during video encoding. Insufficient compression of a video block according to a selected encoding mode and a selected quantization parameter (QP) value may result in the generation and subsequent clipping of out-of-bound quantized transform coefficients for a given video coding standard. The techniques include predicting whether out-of-bound quantized transform coefficients will be generated for a video block, and adjusting at least one of the selected encoding mode and the selected QP value for the video block to prevent the generation of out-of-bound quantized transform coefficients. According to the techniques, the generation of out-of-bound quantized transform coefficients for a video block may be predicted based on difference parameter threshold values, which may be pre-generated and stored in a video encoder.

摘要翻译： 本公开涉及用于在视频编码期间由于产生超出量化的变换系数而在解码的视频序列中防止或减少不期望的颜色和/或灰色斑纹的出现的技术。 根据选择的编码模式和所选择的量化参数（QP）值对视频块的压缩不足可能导致对于给定的视频编码标准的产生和后续的量化变换系数的削波。 这些技术包括预测是否将针对视频块产生外界量化的变换系数，以及调整所选择的编码模式和视频块的所选QP值中的至少一个，以防止产生超出限制 量化变换系数。 根据这些技术，可以基于可以预先生成并存储在视频编码器中的不同参数阈值来预测视频块的外联量化变换系数的生成。

公开(公告)号：US08792550B2

公开(公告)日：2014-07-29

申请号：US13198588

申请日：2011-08-04

申请人： Venkata Naga Poleswara Rao Karuchula ,  Ashish Bajaj ,  Surya Manikya Phanindra Kalanadhabhatla ,  Praneeth Paladugu ,  Aditya Bhuvanagiri

发明人： Venkata Naga Poleswara Rao Karuchula ,  Ashish Bajaj ,  Surya Manikya Phanindra Kalanadhabhatla ,  Praneeth Paladugu ,  Aditya Bhuvanagiri

IPC分类号： H04N7/50 ,  H04N11/04 ,  H04N7/26

CPC分类号： H04N7/50 ,  H04N11/04 ,  H04N19/103 ,  H04N19/124 ,  H04N19/134 ,  H04N19/136 ,  H04N19/176 ,  H04N19/61

摘要： This disclosure relates to techniques for preventing or reducing the appearance of undesirable color and/or gray patches in decoded video sequences due to generation of out-of-bound quantized transform coefficients during video encoding. Insufficient compression of a video block according to a selected encoding mode and a selected quantization parameter (QP) value may result in the generation and subsequent clipping of out-of-bound quantized transform coefficients for a given video coding standard. The techniques include predicting whether out-of-bound quantized transform coefficients will be generated for a video block, and adjusting at least one of the selected encoding mode and the selected QP value for the video block to prevent the generation of out-of-bound quantized transform coefficients. According to the techniques, the generation of out-of-bound quantized transform coefficients for a video block may be predicted based on difference parameter threshold values, which may be pre-generated and stored in a video encoder.

摘要翻译： 本公开涉及用于在视频编码期间由于产生超出量化的变换系数而在解码的视频序列中防止或减少不期望的颜色和/或灰色斑纹的出现的技术。 根据选择的编码模式和所选择的量化参数（QP）值对视频块的压缩不足可能导致对于给定的视频编码标准的产生和后续的量化变换系数的削波。 这些技术包括预测是否将针对视频块产生外界量化的变换系数，以及调整所选择的编码模式和视频块的所选QP值中的至少一个，以防止产生超出限制 量化变换系数。 根据这些技术，可以基于可以预先生成并存储在视频编码器中的不同参数阈值来预测视频块的外联量化变换系数的生成。