公开(公告)号：US10728568B1

公开(公告)日：2020-07-28

申请号：US15933028

申请日：2018-03-22

Applicant: Amazon Technologies, Inc.

Inventor： Charles Benjamin Franklin Waggoner ,  Yongjun Wu ,  Hai Wei

IPC: H04N19/46 ,  H04N19/52 ,  H04N19/176

Abstract: Techniques are described for adaptive encoding of different visual elements in a video frame. Characteristics of visual elements can be determined and used to set encoding parameters for the visual elements. The visual elements can be encoded such that one visual element is encoded differently than another visual element if they have different characteristics.

公开(公告)号：US10694238B1

公开(公告)日：2020-06-23

申请号：US16044274

申请日：2018-07-24

Applicant: Amazon Technologies, Inc.

Inventor： Avinash Priya Khurana ,  Timothy Prins ,  Yongjun Wu

IPC: H04N7/025 ,  H04N21/262 ,  H04N21/235 ,  H04N21/2343 ,  H04N21/234

Abstract: Methods and apparatus are described for estimating the peak bit rate for content and specifying the BANDWIDTH tag value for HLS content. This disclosure also describes techniques by which live content and VOD content can be stitched together in a way that harmonizes the different requirements for the BANDWIDTH tag for the different types of content.

公开(公告)号：US10681104B1

公开(公告)日：2020-06-09

申请号：US15799143

申请日：2017-10-31

Applicant: Amazon Technologies, Inc.

Inventor： Yongjun Wu ,  Henry Liu ,  Amritaansh Verma

IPC: H04L29/06 ,  H04L29/08

Abstract: Techniques are described for handling offsets (gaps or overlaps) that occur between segments of streaming content, e.g., between a segment of primary content (e.g., a live sporting event) and a segment of secondary content (e.g., ad content) dynamically inserted into the stream. The effect of such offsets can be that synchronization between the video and audio portions of the stream can be lost. By tracking a cumulative offset derived from the audio portion of the stream and applying that offset to the presentation times of each affected sample of both the audio and video portions of the stream, synchronization of the audio and video is maintained.

公开(公告)号：US10484446B1

公开(公告)日：2019-11-19

申请号：US15421145

申请日：2017-01-31

Applicant: Amazon Technologies, Inc.

Inventor： Charles Benjamin Franklin Waggoner ,  Marc Joliveau ,  Stefan Christian Richter ,  Yongjun Wu

IPC: H04L29/06 ,  H04L29/08 ,  H04N21/2187 ,  H04N21/858 ,  H04N21/6373 ,  H04L12/801

Abstract: Techniques are described that enable the use of variable bit rate (VBR) encoding for live content.

公开(公告)号：US10432690B1

公开(公告)日：2019-10-01

申请号：US15888410

申请日：2018-02-05

Applicant: Amazon Technologies, Inc.

Inventor： Lei Li ,  Yongjun Wu ,  Samuel James Van Pelt ,  Amarsingh Buckthasingh Winston ,  Kyle Bradley Koceski ,  Mairo Pedrini ,  Christopher Steven Mark Pringle ,  Mushegh Malkhasyan

IPC: H04L29/06 ,  H04L29/08

Abstract: Methods and apparatus are described for partitioning a manifest file to generate smaller manifest files for media content playback. A server partitions a manifest file prior to receipt of a request from a client or in response to a request from a client for a manifest for media content for a particular temporal range or subset of playback options.

公开(公告)号：US10425642B1

公开(公告)日：2019-09-24

申请号：US15041606

申请日：2016-02-11

Applicant: Amazon Technologies, Inc.

Inventor： Yongjun Wu

IPC: H04N19/124 ,  H04N19/137 ,  H04N19/172 ,  H04N19/18 ,  H04N19/31 ,  H04N19/645 ,  H04N19/86

Abstract: Techniques are described for encoding noisy media content to improve its visual quality. Quantization parameters can be applied to residual coefficient matrices of portions of an image frame as a compression technique. To improve the visual quality of media content, the quantization parameters to be applied can be adjusted to fit within a range around a representative quantization parameter of all of the portions of the image frame.

公开(公告)号：US10136146B1

公开(公告)日：2018-11-20

申请号：US15078898

申请日：2016-03-23

Applicant: Amazon Technologies, Inc.

Inventor： Yongjun Wu ,  Lei Li ,  Amarsingh Buckthasingh Winston

IPC: H04N19/33 ,  H04N19/70 ,  H04N19/48 ,  H04N19/91 ,  H04N21/2662 ,  H04N19/115 ,  H04N19/46

Abstract: Techniques for encoding media content are described that reduce the overhead associated with metadata when the encoded content is streamed over a network. Some of these techniques involve the selection of parameters or consolidation of information to ensure consistency or uniformity of metadata values. Others relate to the recognition and removal of redundancies or optional information. Still others take advantage of characteristics of specific bit rate scenarios to more efficiently represent information.

公开(公告)号：US09998746B2

公开(公告)日：2018-06-12

申请号：US15040602

申请日：2016-02-10

Applicant: Amazon Technologies, Inc.

Inventor： Yongjun Wu ,  Charles Benjamin Franklin Waggoner ,  Amarsingh Buckthasingh Winston

IPC: H04N5/92 ,  H04N19/44 ,  H04N19/426 ,  H04N19/48 ,  H04N19/625 ,  H04N19/124 ,  H04N19/136 ,  H04N19/46 ,  H04N19/176 ,  H04N19/134 ,  H04N19/122 ,  H04N19/61 ,  H04N19/18 ,  H04N19/42

CPC classification number: H04N19/44 ,  H04N19/122 ,  H04N19/124 ,  H04N19/134 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/42 ,  H04N19/426 ,  H04N19/45 ,  H04N19/46 ,  H04N19/48 ,  H04N19/61 ,  H04N19/625

Abstract: Techniques are described for optimizing memory used by a video decoder. A residual coefficient matrix including non-zero value residual coefficients of a larger parent matrix with both non-zero and zero value residual coefficients can be provided to the decoder. Residual coefficient matrix metadata can also be provided so that a modified and reduced inverse transform matrix can be selected and applied to the residual coefficient matrix.

公开(公告)号：US20170230677A1

公开(公告)日：2017-08-10

申请号：US15040602

申请日：2016-02-10

Applicant: Amazon Technologies, Inc.

Inventor： Yongjun Wu ,  Charles Benjamin Franklin Waggoner ,  Amarsingh Buckthasingh Winston

IPC: H04N19/44 ,  H04N19/48 ,  H04N19/46 ,  H04N19/124 ,  H04N19/136 ,  H04N19/426 ,  H04N19/625

CPC classification number: H04N19/44 ,  H04N19/122 ,  H04N19/124 ,  H04N19/134 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/42 ,  H04N19/426 ,  H04N19/45 ,  H04N19/46 ,  H04N19/48 ,  H04N19/61 ,  H04N19/625

Abstract: Techniques are described for optimizing memory used by a video decoder. A residual coefficient matrix including non-zero value residual coefficients of a larger parent matrix with both non-zero and zero value residual coefficients can be provided to the decoder. Residual coefficient matrix metadata can also be provided so that a modified and reduced inverse transform matrix can be selected and applied to the residual coefficient matrix.

公开(公告)号：US12101529B1

公开(公告)日：2024-09-24

申请号：US17448039

申请日：2021-09-17

Applicant: Amazon Technologies, Inc.

Inventor： Yongjun Wu ,  Zaixi Shang ,  Sriram Sethuraman ,  Hai Wei ,  Xiaohan Nie

IPC: H04N7/10 ,  G06T5/70 ,  G06T7/11 ,  G06T7/194 ,  G06T11/00 ,  G06V10/22 ,  G06V20/40 ,  H04N21/44 ,  H04N21/488 ,  H04N21/81

CPC classification number: H04N21/44008 ,  G06T5/70 ,  G06T7/11 ,  G06T7/194 ,  G06T11/00 ,  G06V10/225 ,  G06V20/40 ,  H04N21/488 ,  H04N21/812 ,  G06T2207/10016 ,  G06T2207/30221

Abstract: Techniques are described for facilitating client-side augmented reality overlay of secondary content during live events. Regions for overlaying secondary content are identified along with attributes for each region. A client device may then used the attributes to overlay secondary content in each region prior to playback.