公开(公告)号：US10924739B2

公开(公告)日：2021-02-16

申请号：US16177156

申请日：2018-10-31

Applicant: ATI Technologies ULC

Inventor： Dennis Lew ,  Jiao Wang ,  Lei Zhang ,  Edward A. Harold

IPC: H04N7/12 ,  H04N19/124 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176

Abstract: Systems, apparatuses, and methods for calculating a quantization parameter (QP) for encoding video frames to meet a given bit budget are disclosed. Control logic coupled to an encoder calculates a complexity indicator that represents a level of difficulty in encoding a previous video frame. The complexity indicator is based at least in part on a first parameter associated with the previous video frame and corresponds to one or more of a variance, an intra-prediction factor, and an inter-to-intra ratio. The complexity indicator is then used by the control logic to calculate a preferred QP to use to encode the current video frame to meet a given bit budget. By using the preferred QP generated based on the complexity indicator, the encoder is able to make fewer QP adjustments during the frame. This helps to improve the visual quality of the resulting encoded video bitstream.

公开(公告)号：US20170214941A1

公开(公告)日：2017-07-27

申请号：US15007748

申请日：2016-01-27

Applicant: ATI Technologies ULC

Inventor： Jiao Wang

IPC: H04N19/597 ,  H04N19/11

Abstract: A method, apparatus and system uses the intra prediction modes that were used to encode a base view data block as well as the intra prediction modes used to encode neighboring data blocks to the base view data block as a set of candidate intra prediction modes for use in encoding a collocated data block in the dependent view. A sum of absolute difference (SAD) calculation may also be used to determine and select the candidate intra prediction mode that has the smallest value and hence best encoding properties for the dependent view data block. The data block in the dependent view is then encoded using the selected candidate intra prediction mode.

公开(公告)号：US09609358B2

公开(公告)日：2017-03-28

申请号：US13948968

申请日：2013-07-23

Applicant: ATI Technologies ULC

Inventor： Jiao Wang

IPC: H04N19/00 ,  H04N19/59 ,  H04N19/176 ,  H04N19/147 ,  H04N19/103 ,  H04N19/14 ,  H04N19/40

CPC classification number: H04N19/59 ,  H04N19/103 ,  H04N19/14 ,  H04N19/147 ,  H04N19/176 ,  H04N19/40

Abstract: A method and apparatus are described for performing video encoding mode decisions in a video transcoding system. A down-scaled frame may be received that includes at least one macroblock. The down-scaled frame may be associated with a full-scale frame having a plurality of macroblocks that have been downsampled. A weighting factor and a distance measure factor may be determined for each of the macroblocks in the full-scale frame. Predicted blocks may be generated based on the weighting and distance measure factors.

公开(公告)号：US20170085871A1

公开(公告)日：2017-03-23

申请号：US14861049

申请日：2015-09-22

Applicant: ATI Technologies ULC

Inventor： Jiao Wang ,  Ying Zhang

IPC: H04N19/105 ,  H04N19/166 ,  H04N19/895

CPC classification number: H04N19/105 ,  H04N19/109 ,  H04N19/166 ,  H04N19/172 ,  H04N19/177 ,  H04N19/503 ,  H04N19/895

Abstract: In a video coding system, a method includes transmitting a first encoded picture from an encoder for reception by a decoder as part of an encoded bitstream. The first encoded picture acts a first reference picture for one or more subsequent pictures in the output encoded bitstream. The method further includes receiving, at the encoder, an indication from the decoder that there was an error in receiving the first encoded picture, and selecting a second reference picture from a buffer of reference pictures at the encoder. The selected second reference picture selected as being earlier than the first reference picture in an encoding order of the encoded bitstream. The method further includes configuring the encoder to encode a set of one or more pictures for the encoded bitstream using the second reference picture and signaling the first reference picture as a non-reference picture.

公开(公告)号：US20150030082A1

公开(公告)日：2015-01-29

申请号：US13948968

申请日：2013-07-23

Applicant: ATI Technologies ULC

Inventor： Jiao Wang

IPC: H04N19/33

CPC classification number: H04N19/59 ,  H04N19/103 ,  H04N19/14 ,  H04N19/147 ,  H04N19/176 ,  H04N19/40

Abstract: A method and apparatus are described for performing video encoding mode decisions in a video transcoding system. A down-scaled frame may be received that includes at least one macroblock. The down-scaled frame may be associated with a full-scale frame having a plurality of macroblocks that have been downsampled. A weighting factor and a distance measure factor may be determined for each of the macroblocks in the full-scale frame. Predicted blocks may be generated based on the weighting and distance measure factors.

Abstract translation: 描述了用于在视频代码转换系统中执行视频编码模式决定的方法和装置。 可以接收包括至少一个宏块的缩小帧。 缩小的帧可以与具有已经被采样的多个宏块的满量程帧相关联。 可以为满量程帧中的每个宏块确定加权因子和距离测量因子。 可以基于加权和距离测量因子来生成预测块。

公开(公告)号：US11368692B2

公开(公告)日：2022-06-21

申请号：US16177128

申请日：2018-10-31

Applicant: ATI Technologies ULC

Inventor： Jinbo Qiu ,  Yang Liu ,  Ihab Amer ,  Lei Zhang ,  Edward A. Harold ,  Zhiqi Hao ,  Jiao Wang ,  Gabor Sines ,  Haibo Liu ,  Boris Ivanovic

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/172

Abstract: Systems, apparatuses, and methods for generating a model for determining a quantization strength to use when encoding video frames are disclosed. A pre-encoder performs multiple encoding passes using different quantization strengths on a portion or the entirety of one or more pre-processed video frames. The pre-encoder captures the bit-size of the encoded output for each of the multiple encoding passes. Then, based on the multiple encoding passes, the pre-encoder generates a model for mapping bit-size to quantization strength for encoding video frames or portion(s) thereof. When the encoder begins the final encoding pass for one or more given video frames or any portion(s) thereof, the encoder uses the model to map a preferred bit-size to a given quantization strength. The encoder uses the given quantization strength when encoding the given video frame(s) or frame portion(s) to meet a specified bit-rate for the encoded bitstream.

公开(公告)号：US09832479B2

公开(公告)日：2017-11-28

申请号：US14046095

申请日：2013-10-04

Applicant: ATI Technologies ULC

Inventor： Jiao Wang

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/513 ,  H04N19/597 ,  H04N7/14 ,  H04N21/2365

CPC classification number: H04N19/513 ,  H04N7/147 ,  H04N19/597 ,  H04N21/2365

Abstract: A motion estimation apparatus and method (carried out electronically) provides for encoding of multiview video, such as stereoscopic video, by providing motion estimation for pixels in a dependent eye view, using motion vector information from a colocated group of pixels in a base eye view and neighboring pixels to the colocated group of pixels in the base eye view. The method and apparatus encodes a group of pixels in a dependent eye view based on the estimated motion vector information. The method and apparatus may also include obtaining a frame of pixels that includes both base eye view pixels and dependent eye pixels so that, for example, frame compatible format packing can be employed. In one example, estimating the motion vector information for a block of pixels, for example, in a dependent eye view is based on a median value calculation of motion vectors for a block of pixels in a base eye view and motion vectors for neighboring blocks of pixels to the colocated group of pixels in the base eye view. An apparatus and method may include transmitting the encoded dependent eye view and base eye view information to another device and decoding the encoded dependent eye view and base eye view information for display.

公开(公告)号：US09736477B2

公开(公告)日：2017-08-15

申请号：US14021185

申请日：2013-09-09

Applicant: ATI Technologies ULC

Inventor： Jiao Wang

IPC: H04N19/109 ,  H04N19/137 ,  H04N19/176 ,  H04N19/40 ,  H04N19/59 ,  H04N19/147 ,  H04N19/19

CPC classification number: H04N19/109 ,  H04N19/137 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/40 ,  H04N19/59

Abstract: A method and apparatus are described for performing video encoding mode decisions. A down-scaled frame is received that includes a macroblock corresponding to a first subset of macroblocks of a first area in a full-scale frame. A first average motion vector is calculated for the first subset of macroblocks, and a second average motion vector is calculated for a second subset of macroblocks of a second area surrounding the first subset of macroblocks. A comparison of a threshold to a distance measure between absolute values of the first and second average motion vectors is performed. A prediction mode for the macroblock in the down-scaled frame is determined based on the comparison to generate predicted blocks.

公开(公告)号：US09497439B2

公开(公告)日：2016-11-15

申请号：US13942280

申请日：2013-07-15

Applicant: ATI TECHNOLOGIES ULC

Inventor： Jiao Wang

IPC: H04N19/51 ,  H04N13/00 ,  H04N19/597 ,  H04N19/53

CPC classification number: H04N13/161 ,  H04N19/53 ,  H04N19/597

Abstract: Generally, an apparatus and a method for encoding multiview video downscale two views of the multiview video, determine a shift between the downscaled views, and encode one the two views using the shift.

Abstract translation: 一般来说，用于对多视点视频进行二次视图缩减的多视点视频编码的装置和方法，确定缩小的视图之间的移动，并使用该移位对两个视图进行编码。

公开(公告)号：US20150271491A1

公开(公告)日：2015-09-24

申请号：US14223160

申请日：2014-03-24

Applicant: ATI Technologies ULC

Inventor： Jiao Wang

IPC: H04N19/11 ,  H04N19/593 ,  H04N19/40

CPC classification number: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/40

Abstract: An apparatus and a method for selecting an intra prediction mode for use in video transcoding obtain information from a decoder portion of a video transcoder regarding one or more intra prediction modes used in previously encoding one or more data blocks of a source image. The apparatus and method select an intra prediction mode for encoding a decoded data block corresponding to the one or more data blocks of the source image based on the information obtained from the decoder portion regarding the one or more intra prediction modes used in previously encoding the one or more data blocks of the source image.

Abstract translation: 一种用于选择用于视频代码转换的帧内预测模式的装置和方法，用于从视频转码器的解码器部分获得关于在先前编码源图像的一个或多个数据块中使用的一个或多个帧内预测模式的信息。 该装置和方法基于从解码器部分获得的关于在先前编码的一个或多个帧内预测模式中的一个或多个帧内预测模式的信息，选择用于对与源图像的一个或多个数据块相对应的解码数据块进行编码的帧内预测模式 或更多的源图像的数据块。