-
公开(公告)号：US20180302628A1
公开(公告)日：2018-10-18
申请号：US16013934
申请日：2018-06-20
发明人： Mandayam Narasimhan , Ajay Luthra
IPC分类号： H04N19/156 , H04N19/14 , H04N21/434 , H04N19/31 , H04N19/36 , H04N19/34 , H04N21/2362 , H04N19/70 , H04N19/30 , H04N21/238 , H04N21/2343 , H04N19/46 , H04N21/44 , H04N19/187
摘要： A method is provided for signaling individual layer parameters in a transport stream that includes: indicating, using a supplemental enhancement information (SEI) message in the video stream, operation point information; inserting the operation point information in the transport stream using an operation point descriptor; and providing the operation point descriptor in a Program Map Table (PMT).
-
92.发明申请公开(公告)号：US20180027039A1
公开(公告)日：2018-01-25
申请号：US15655464
申请日：2017-07-20
发明人： Praveen N. Moorthy , Mark S. Schmidt , Ajay Luthra , Baozhou Li
CPC分类号： H04L65/601 , H04L1/0002 , H04L65/4069 , H04L65/4084 , H04L65/607 , H04L65/608 , H04L65/80 , H04L67/02 , H04L67/303 , H04N21/2393 , H04N21/2401 , H04N21/2402 , H04N21/25808 , H04N21/26216 , H04N21/26258 , H04N21/2662 , H04N21/41407 , H04N21/44004 , H04N21/4621 , H04N21/8456
摘要： A method for distributing video content from a server to a plurality of media devices is provided allowing adaptive bit rate encoding to better utilize bandwidth. The method includes: determining, by the server, the bandwidth to allocate to each of the plurality of media devices using a hypertext transfer protocol-based live streaming client model or a need parameter vector, refining this determination by utilizing client feedback regarding client buffer level and playback state, client hardware capabilities, and client internally measured download rate, and providing the allocated bandwidth to each of the plurality of media devices; wherein the video content is transmitted in a plurality of segments from the server, and wherein each segment is transmitted at a bitrate that may vary from segment to segment.
-
公开(公告)号：US20170347138A1
公开(公告)日：2017-11-30
申请号：US15602226
申请日：2017-05-23
发明人： Shiv Saxena , Peter A. Borgwardt , Ajay Luthra
IPC分类号： H04N21/2365 , H04N21/234 , H04N19/154 , H04L29/06 , H04N21/239 , H04N21/2343
CPC分类号： H04N21/23655 , H04L65/4084 , H04L65/607 , H04N19/154 , H04N19/40 , H04N19/59 , H04N19/70 , H04N21/23418 , H04N21/23439 , H04N21/2393
摘要： A method is provided for improved transcoding of an encoded bit stream to be delivered in accordance with adaptive bit rate (ABR) streaming at a highest available selected bit rate using metadata. The method includes receiving a first encoded ABR stream for a given content item that is encoded at a highest available bit rate. Also received is metadata associated with encoding the given content item at a selected bit rate lower than the highest available bit rate. A second encoded ABR stream is generated for the given content item at the selected bit rate from the first encoded ABR stream and the metadata associated with encoding the given content item at the selected bit rate.
-
公开(公告)号：US20170346874A1
公开(公告)日：2017-11-30
申请号：US15682068
申请日：2017-08-21
发明人： Mark S. Schmidt , Praveen N. Moorthy , Ajay Luthra , Paul Moroney
IPC分类号： H04L29/06 , H04N21/2343
CPC分类号： H04L65/607 , H04L65/4069 , H04N21/2343
摘要： Methods and systems are described for adaptively transmitting streaming data to a client. In one embodiment, the method comprises receiving, in a server, a request for a data asset from the client, transcoding at least an segment of the data asset according to initial transcoding parameters, transmitting a first fragment of the transcoded segment of the data asset from the server to the client over a communication channel, generating an estimate of a bandwidth of the communications channel at least in part from information acknowledging reception of at least the first fragment of the transcoded segment of the data asset by the client, generating adaptive transcoding parameters at least in part from an estimate of a bandwidth of the communications channel, the estimate generated at the server, transcoding a further segment of the data asset according to the adaptive transcoding parameters, and transmitting the further segment of the data asset.
-
95.发明申请公开(公告)号：US20170026646A1
公开(公告)日：2017-01-26
申请号：US15217046
申请日：2016-07-22
发明人： Koohyar Minoo , Zhouye Gu , David M. Baylon , Ajay Luthra
IPC分类号： H04N19/124 , H04N19/182 , H04N19/186 , H04N19/172
CPC分类号： H04N19/124 , H04N19/117 , H04N19/136 , H04N19/172 , H04N19/174 , H04N19/179 , H04N19/182 , H04N19/186 , H04N19/36 , H04N19/46
摘要： A method of encoding a digital video data applies adaptive pre-processing to data representing high dynamic range (HDR) and/or wide color gamut (WCG) image data prior to encoding and complementary post-processing to the data after decoding in order to allow at least partial reproduction of the HDR and/or WCG data. The example methods apply one or more color space conversions, and a perceptual transfer functions to the data prior to quantization. The example methods apply inverse perceptual transfer functions and inverse color space conversions after decoding to recover the HDR and/or WCG data. The transfer functions are adaptive so that different transfer functions may be applied to video data sets including different groups of frames, frames or processing windows in a single frame. Information on the data set and information on the applied transfer function is passed as metadata from the encoder to the decoder.
摘要翻译： 对数字视频数据进行编码的方法对编码之后的高动态范围（HDR）和/或宽色域（WCG）图像数据的数据应用自适应预处理，以便在解码之后对数据进行补充后处理，以便允许 至少部分再现HDR和/或WCG数据。 示例性方法应用一个或多个颜色空间转换，并且在量化之前将感知传递函数应用于数据。 示例性方法在解码之后应用反向感知传递函数和反色彩空间转换以恢复HDR和/或WCG数据。 传递函数是自适应的，使得不同的传递函数可以应用于包括单个帧中的不同组帧，帧或处理窗口的视频数据集。 关于数据集的信息和应用传递函数的信息作为元数据从编码器传递到解码器。
-
-
-
-
搜索结果
95 条记录 (耗时 0.022 秒)
