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Method and device for random access and synchronization of bit streams for multimedia applications

A random access point and random image access technology, applied in the field of media streaming, can solve the problems of not being able to consider the possibility, the encoder does not understand the actual application of the underlying media data, etc.

Active Publication Date: 2021-05-07
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the encoding process, the encoder may not know the actual application in which the underlying media data will be used
Therefore, the decision to encode a random access point I image as an instantaneous decoding refresh image or a broken link access image cannot take into account all possibilities

Method used

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  • Method and device for random access and synchronization of bit streams for multimedia applications
  • Method and device for random access and synchronization of bit streams for multimedia applications
  • Method and device for random access and synchronization of bit streams for multimedia applications

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Embodiment Construction

[0032] The following description is a preferred mode of carrying out the present invention. The purpose of this description is to illustrate the general principles of the invention, not to limit it. The scope of protection of the present invention should be defined by the claims.

[0033] Figure 1A and Figure 1B Two examples of group-of-picture structures are shown for representing in-sequence pictures / access point sequences, where intra pictures are type 3 streaming access points instead of instantaneous decode refresh pictures. The instantaneous decoding refresh picture is an intra frame (Intra frame) with a refresh point of the decoder. In other words, it is an open group-of-pictures structure based media segment that has the advantage of more efficient encoding, resulting in lower encoding rates. Arrowed lines represent coded reference dependencies. In the present invention, I picture, P picture and B r An image is called an anchor picture, which means it can be us...

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Abstract

The invention discloses a method and device for switching representations. On the server side, the leading image information related to the leading image in the open image group is sent in the media presentation description. Each leading picture corresponds in output order to a picture preceding the random access picture in the segment, and the encoding of the picture is based on the random access picture. On the client side, the original representation and the target representation are received, and leading image information for the target representation is determined from the received media presentation description. Presentation switched presentation, where a presentation is given that switches from the original representation to the target representation by switching the presentation from the image in the original representation to the image in the target representation at a stream access point corresponding to Random access images within a segment of the identified target representation.

Description

[0001] priority statement [0002] This application requires the U.S. Provisional Patent Application No. 62 / 202,588 filed on August 7, 2015, the U.S. Provisional Patent Application No. 62 / 205,153 filed on August 14, 2015, and the U.S. Provisional Patent Application No. 62 / 205,153 filed on May 13, 2016 Priority to US Provisional Patent Application No. 62 / 335,871. The aforementioned US Provisional Patent Application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to media streaming on the Internet. Specifically, the present invention relates to a method and device for rendering seamless switching between two streams including multiple segments using an open Group of Pictures (GOP) structure. Background technique [0004] The HyperText Transfer Protocol (HTTP) is a set of standards that allows users of the World Wide Web to exchange information found on web pages. Standards for Internet access have been addressed. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/2343
CPCH04N21/2343H04N21/4621H04N21/6125H04N21/8456H04N21/44016H04N21/8455
Inventor 陈鲁林刘杉
Owner MEDIATEK INC