公开(公告)号：US20150334397A1

公开(公告)日：2015-11-19

申请号：US14814446

申请日：2015-07-30

Applicant: Apple Inc.

Inventor： Thomas Pun ,  Roger Kumar ,  Xiaochun Nie ,  Hsi-Jung Wu

IPC: H04N19/126 ,  H04N19/146 ,  H04N19/625 ,  H04N19/176 ,  H04N19/61

CPC classification number: H04N19/126 ,  H04N19/146 ,  H04N19/149 ,  H04N19/176 ,  H04N19/196 ,  H04N19/197 ,  H04N19/61 ,  H04N19/625

Abstract: Method For Implementing A Quantizer In A Multimedia Compression And Encoding System is disclosed. In the Quantizer system of the present invention, several new quantization ideas are disclosed. In one embodiment, adjacent macroblocks are grouped together into macroblock groups. The macroblock groups are then assigned a common quantizer value. The common quantizer value may be selected based upon how the macroblocks are encoded, the type of macroblocks within the macroblock group (intra-blocks or inter-blocks), the history of the motion vectors associated with the macroblocks in the macroblock group, the residuals of the macroblocks in the macroblock group, and the energy of the macroblocks in the macroblock group. The quantizer value may be adjusted in a manner that is dependent on the current quantizer value. Specifically, if the quantizer value is at the low end of the quantizer scale, then only small adjustments are made. If the quantizer value is at the high end then larger adjustments may be made to the quantizer. Finally, in one embodiment, the quantizer is implemented along with an inverse quantizer for efficient operation.

Abstract translation: 公开了一种在多媒体压缩和编码系统中实现量化器的方法。 在本发明的量化器系统中，公开了几种新的量化思想。 在一个实施例中，相邻宏块被分组在一起成为宏块组。 然后向宏块组分配一个公共量化器值。 可以基于宏块如何编码，宏块组（块内或块内）中的宏块的类型，与宏块组中的宏块相关联的运动向量的历史来选择公共量化器值，残差 的宏块组中的宏块的能量，以及宏块组中的宏块的能量。 可以以取决于当前量化器值的方式来调整量化器值。 具体地，如果量化器值处于量化器标尺的低端，则仅进行小的调整。 如果量化器值处于高端，则可以对量化器进行较大的调整。 最后，在一个实施例中，量化器与用于有效操作的逆量化器一起被实现。

公开(公告)号：US09819939B2

公开(公告)日：2017-11-14

申请号：US14814446

申请日：2015-07-30

Applicant: Apple Inc.

Inventor： Thomas Pun ,  Roger Kumar ,  Xiaochun Nie ,  Hsi-Jung Wu

IPC: H04N7/18 ,  H04N19/126 ,  H04N19/625 ,  H04N19/146 ,  H04N19/196 ,  H04N19/176 ,  H04N19/149 ,  H04N19/61

CPC classification number: H04N19/126 ,  H04N19/146 ,  H04N19/149 ,  H04N19/176 ,  H04N19/196 ,  H04N19/197 ,  H04N19/61 ,  H04N19/625

Abstract: Method For Implementing A Quantizer In A Multimedia Compression And Encoding System is disclosed. In the Quantizer system of the present invention, several new quantization ideas are disclosed. In one embodiment, adjacent macroblocks are grouped together into macroblock groups. The macroblock groups are then assigned a common quantizer value. The common quantizer value may be selected based upon how the macroblocks are encoded, the type of macroblocks within the macroblock group (intra-blocks or inter-blocks), the history of the motion vectors associated with the macroblocks in the macroblock group, the residuals of the macroblocks in the macroblock group, and the energy of the macroblocks in the macroblock group. The quantizer value may be adjusted in a manner that is dependent on the current quantizer value. Specifically, if the quantizer value is at the low end of the quantizer scale, then only small adjustments are made. If the quantizer value is at the high end then larger adjustments may be made to the quantizer. Finally, in one embodiment, the quantizer is implemented along with an inverse quantizer for efficient operation.

公开(公告)号：US20190020876A1

公开(公告)日：2019-01-17

申请号：US16120242

申请日：2018-09-01

Applicant: Apple Inc.

Inventor： Thomas Pun ,  Roger Kumar ,  Xiaochun Nie ,  Hsi-Jung Wu

IPC: H04N19/126 ,  H04N19/176 ,  H04N19/196 ,  H04N19/149 ,  H04N19/61 ,  H04N19/146 ,  H04N19/625

Abstract: Method For Implementing A Quantizer In A Multimedia Compression And Encoding System is disclosed. In the Quantizer system of the present invention, several new quantization ideas are disclosed. In one embodiment, adjacent macroblocks are grouped together into macroblock groups. The macroblock groups are then assigned a common quantizer value. The common quantizer value may be selected based upon how the macroblocks are encoded, the type of macroblocks within the macroblock group (intra-blocks or inter-blocks), the history of the motion vectors associated with the macroblocks in the macroblock group, the residuals of the macroblocks in the macroblock group, and the energy of the macroblocks in the macroblock group. The quantizer value may be adjusted in a manner that is dependent on the current quantizer value. Specifically, if the quantizer value is at the low end of the quantizer scale, then only small adjustments are made. If the quantizer value is at the high end then larger adjustments may be made to the quantizer. Finally, in one embodiment, the quantizer is implemented along with an inverse quantizer for efficient operation.

公开(公告)号：US10104375B2

公开(公告)日：2018-10-16

申请号：US15648329

申请日：2017-07-12

Applicant: Apple Inc.

Inventor： Thomas Pun ,  Roger Kumar ,  Xiaochun Nie ,  Hsi-Jung Wu

IPC: H04N19/00 ,  H04N19/126 ,  H04N19/61 ,  H04N19/149 ,  H04N19/625 ,  H04N19/176 ,  H04N19/196 ,  H04N19/146

Abstract: Method For Implementing A Quantizer In A Multimedia Compression And Encoding System is disclosed. In the Quantizer system of the present invention, several new quantization ideas are disclosed. In one embodiment, adjacent macroblocks are grouped together into macroblock groups. The macroblock groups are then assigned a common quantizer value. The common quantizer value may be selected based upon how the macroblocks are encoded, the type of macroblocks within the macroblock group (intra-blocks or inter-blocks), the history of the motion vectors associated with the macroblocks in the macroblock group, the residuals of the macroblocks in the macroblock group, and the energy of the macroblocks in the macroblock group. The quantizer value may be adjusted in a manner that is dependent on the current quantizer value. Specifically, if the quantizer value is at the low end of the quantizer scale, then only small adjustments are made. If the quantizer value is at the high end then larger adjustments may be made to the quantizer. Finally, in one embodiment, the quantizer is implemented along with an inverse quantizer for efficient operation.

公开(公告)号：US20170318295A1

公开(公告)日：2017-11-02

申请号：US15648329

申请日：2017-07-12

Applicant: Apple Inc.

Inventor： Thomas Pun ,  Roger Kumar ,  Xiaochun Nie ,  Hsi-Jung Wu

IPC: H04N19/126 ,  H04N19/61 ,  H04N19/196 ,  H04N19/146 ,  H04N19/176 ,  H04N19/149 ,  H04N19/625

CPC classification number: H04N19/126 ,  H04N19/146 ,  H04N19/149 ,  H04N19/176 ,  H04N19/196 ,  H04N19/197 ,  H04N19/61 ,  H04N19/625

Abstract: Method For Implementing A Quantizer In A Multimedia Compression And Encoding System is disclosed. In the Quantizer system of the present invention, several new quantization ideas are disclosed. In one embodiment, adjacent macroblocks are grouped together into macroblock groups. The macroblock groups are then assigned a common quantizer value. The common quantizer value may be selected based upon how the macroblocks are encoded, the type of macroblocks within the macroblock group (intra-blocks or inter-blocks), the history of the motion vectors associated with the macroblocks in the macroblock group, the residuals of the macroblocks in the macroblock group, and the energy of the macroblocks in the macroblock group. The quantizer value may be adjusted in a manner that is dependent on the current quantizer value. Specifically, if the quantizer value is at the low end of the quantizer scale, then only small adjustments are made. If the quantizer value is at the high end then larger adjustments may be made to the quantizer. Finally, in one embodiment, the quantizer is implemented along with an inverse quantizer for efficient operation.