公开(公告)号：US09407915B2

公开(公告)日：2016-08-02

申请号：US13741927

申请日：2013-01-15

Applicant: Google Inc.

Inventor： Qunshan Gu ,  Xun Cai

IPC: H04N19/124 ,  H04N19/12 ,  H04N19/139 ,  H04N19/159 ,  H04N19/61 ,  H04N19/593 ,  H04N19/36 ,  H04N19/107

CPC classification number: H04N19/12 ,  H04N19/107 ,  H04N19/124 ,  H04N19/139 ,  H04N19/159 ,  H04N19/36 ,  H04N19/593 ,  H04N19/61

Abstract: A block of a frame of a video stream can be encoded using lossless coding that generates a transform domain residual block and a spatial domain difference block. The compression ratio of the coding may be improved by selecting an optimal quantization value on a per-block basis. The optimal quantization value can be selected by quantizing a residual block resulting from prediction of the block using a plurality of candidate quantization values and selecting the candidate quantization value that results in the fewest number of bits for the quantized residual block.

Abstract translation: 可以使用生成变换域残差块和空间域差分块的无损编码对视频流的帧的块进行编码。 可以通过在每个块的基础上选择最佳量化值来提高编码的压缩比。 可以通过使用多个候选量化值量化由块的预测产生的残差块并选择导致量化残差块的最少位数的候选量化值来选择最佳量化值。