公开(公告)号：EP1549073A3

公开(公告)日：2005-09-14

申请号：EP04027310.4

申请日：2004-11-17

申请人： NVIDIA Corporation

发明人： Prabhakar, Ram ,  Reddy, Harikrishna M. ,  Zhong, Lefan ,  Sun, Wei ,  Vainsencher, Leonardo ,  Vaduganathan, Visalakshi

IPC分类号： H04N7/24

CPC分类号： H04N19/103 ,  H04N19/129 ,  H04N19/136 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/42 ,  H04N19/48 ,  H04N19/593 ,  H04N19/61 ,  H04N19/89

摘要： A dynamic AC prediction technique is implemented in a data partition mode which automatically disables AC prediction for encoding the current macroblock in the next packet when packet overflow occurs. Otherwise, when there is no overflow, AC prediction remains enabled to maintain compression efficiency. More particularly, in the preferred embodiment, a determination is first made whether a macroblock causes a packet overflow if it is encoded in the current packet. If so, a new packet is initiated into which the macroblock is encoded without AC prediction as the first macroblock. Otherwise, the macroblock with AC prediction remains in the current packet and a new macroblock is encoded.

公开(公告)号：EP1549073A2

公开(公告)日：2005-06-29

申请号：EP04027310.4

申请日：2004-11-17

申请人： NVIDIA Corporation

发明人： Prabhakar, Ram ,  Reddy, Harikrishna M. ,  Zhong, Lefan ,  Sun, Wei ,  Vainsencher, Leonardo ,  Vaduganathan, Visalakshi

IPC分类号： H04N7/24

CPC分类号： H04N19/103 ,  H04N19/129 ,  H04N19/136 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/42 ,  H04N19/48 ,  H04N19/593 ,  H04N19/61 ,  H04N19/89

摘要： A dynamic AC prediction technique is implemented in a data partition mode which automatically disables AC prediction for encoding the current macroblock in the next packet when packet overflow occurs. Otherwise, when there is no overflow, AC prediction remains enabled to maintain compression efficiency. More particularly, in the preferred embodiment, a determination is first made whether a macroblock causes a packet overflow if it is encoded in the current packet. If so, a new packet is initiated into which the macroblock is encoded without AC prediction as the first macroblock. Otherwise, the macroblock with AC prediction remains in the current packet and a new macroblock is encoded.

摘要翻译： 动态AC预测技术在数据分区模式下实现，当分组溢出发生时，该数据分割模式自动禁用用于对下一个分组中的当前宏块进行编码的AC预测。 否则，当没有溢出时，AC预测仍然能够保持压缩效率。 更具体地，在优选实施例中，首先确定宏块如果在当前分组中被编码则导致分组溢出。 如果是，则发起新的分组，其中宏块被编码而没有AC预测作为第一宏块。 否则，具有AC预测的宏块保持在当前分组中，并且对新的宏块进行编码。