公开(公告)号：US09961398B2

公开(公告)日：2018-05-01

申请号：US15429306

申请日：2017-02-10

Applicant: BEIJING BAIDU NETCOM SCIENCE AND TECHNOLOGY CO., LTD.

Inventor： Yongxing Li ,  Huifeng Shen ,  Jun Ge ,  Jingbo Huang ,  Xu Li

IPC: H04N21/438 ,  H04N21/2387 ,  H04N21/472 ,  H04N21/44 ,  H04N21/234 ,  H04N21/434 ,  H04N21/433

CPC classification number: H04N21/4383 ,  H04N21/234 ,  H04N21/2387 ,  H04N21/4331 ,  H04N21/4345 ,  H04N21/44 ,  H04N21/47217

Abstract: Disclosed is a method and device for switching video streams. The method comprises: acquiring video streams of a video in response to receiving a playback request for the video sent by a terminal, the video streams comprising: a video stream with a first group of pictures (GOP) frame number and a video stream with a second GOP frame number; sending the video stream with the first GOP frame number to the terminal, searching for a third key frame in the video stream with the first GOP frame number, and extracting a decoding time stamp (DTS) of the third key frame; searching the video stream with the second GOP frame number for a frame having an identical DTS; determining whether the frame is a fourth key frame in response to finding the frame having the identical DTS; and sending the video stream with the second GOP frame number to the terminal.

公开(公告)号：US11310558B2

公开(公告)日：2022-04-19

申请号：US16911777

申请日：2020-06-25

Applicant: BEIJING BAIDU NETCOM SCIENCE AND TECHNOLOGY CO., LTD.

Inventor： Yongxing Li

IPC: H04N21/234 ,  H04N21/24 ,  H04N21/2662 ,  H04N21/4402 ,  H04N21/442 ,  H04N21/44

Abstract: The present disclosure provides a buffer processing method, apparatus, device and computer storage medium, where the method comprises: if it is detected that a drop of an available bandwidth of a receiving terminal exceeds a preset first threshold, detecting whether a drop of a video frame rate of the receiving terminal exceeds a preset second threshold, the second threshold being smaller than the first threshold; if YES, adjusting a buffer size of the receiving terminal; and if NO, keeping the buffer size of the receiving terminal unchanged. The manner provided by the present disclosure can optimize the buffer of the receiving terminal and reduce the delay.

公开(公告)号：US20180084020A1

公开(公告)日：2018-03-22

申请号：US15430167

申请日：2017-02-10

Applicant: Beijing Baidu Netcom Science and Technology Co., Ltd.

Inventor： Yongxing Li ,  Huifeng Shen

IPC: H04L29/06 ,  H04L12/26

CPC classification number: H04L65/4092 ,  H04L43/0894 ,  H04L43/16 ,  H04L65/4076 ,  H04L65/601 ,  H04L65/602 ,  H04L65/607 ,  H04L65/80

Abstract: A method and apparatus for adaptively providing multiple bit rate streaming media in a server. The method for adaptively providing multiple bit rate streaming media comprises: acquiring network quality information; in the case that it is determined based on the network quality information that bit rate switching is needed, selecting one queue from all queues as the transmitting queue, wherein multimedia data frames with different bit rates for the same media content are stored in different queues; reading the multimedia data frame from the transmitting queue and sending it, and deleting all multimedia data frames in other queues having the same media content as the already-sent multimedia data frame. The technical solutions provided by the present disclosure reduces bit rate switching delay while implementing adaptive bit rate switching, and implements quick and seamless adaptive bit rate switching.

公开(公告)号：US20180054649A1

公开(公告)日：2018-02-22

申请号：US15429306

申请日：2017-02-10

Applicant: BEIJING BAIDU NETCOM SCIENCE AND TECHNOLOGY CO., LTD.

Inventor： Yongxing Li ,  Huifeng Shen ,  Jun Ge ,  Jingbo Huang ,  Xu Li

IPC: H04N21/438 ,  H04N21/2387 ,  H04N21/472 ,  H04N21/44 ,  H04N21/234 ,  H04N21/434 ,  H04N21/433

CPC classification number: H04N21/4383 ,  H04N21/234 ,  H04N21/2387 ,  H04N21/4331 ,  H04N21/4345 ,  H04N21/44 ,  H04N21/47217

Abstract: Disclosed is a method and device for switching video streams. The method comprises: acquiring video streams of a video in response to receiving a playback request for the video sent by a terminal, the video streams comprising: a video stream with a first group of pictures (GOP) frame number and a video stream with a second GOP frame number; sending the video stream with the first GOP frame number to the terminal, searching for a third key frame in the video stream with the first GOP frame number, and extracting a decoding time stamp (DTS) of the third key frame; searching the video stream with the second GOP frame number for a frame having an identical DTS; determining whether the frame is a fourth key frame in response to finding the frame having the identical DTS; and sending the video stream with the second GOP frame number to the terminal.