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Bandwidth adjustment for real-time video transmission

A video and bandwidth technology, applied in the field of video encoding and decoding, can solve problems such as packet loss, real-time video transmission, and bit stream decoding errors

Active Publication Date: 2020-06-30
ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during transmission or storage of a video bitstream, packet loss or other errors may occur, resulting in errors in the decoding of said bitstream
It is also common for the available channel bandwidth to change from time to time, causing problems for real-time video transmission

Method used

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  • Bandwidth adjustment for real-time video transmission
  • Bandwidth adjustment for real-time video transmission
  • Bandwidth adjustment for real-time video transmission

Examples

Experimental program
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Embodiment Construction

[0036] Digital video can be used for entertainment, video conferencing, advertising and generally information sharing. User expectations for digital video quality will be high, as users expect the same high spatial and temporal quality of video broadcast over the limited-bandwidth shared Internet as video broadcast over dedicated cable channels. For example, digital video coding compresses the bit stream of digital video to allow high-quality digital video transmission over networks with limited bandwidth. For example, digital video quality can be defined as the degree to which the output decompressed and decoded digital video matches the input digital video.

[0037] Video encoding and decoding integrates various technologies to compress and decompress digital video streams, so that high-quality digital video streams can be transmitted in networks with limited bandwidth capabilities. These techniques may process a digital video stream into a series of digital data blocks, pr...

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PUM

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Abstract

A method for bandwidth adjustment for real-time video transmission is disclosed herein. The method comprises transmitting, by a sender, a first portion of the video bitstream encoded using a current bitrate and transmitted as a series of data packets, receiving, by the sender, a back channel message from the receiver, wherein the back channel message comprises receiver-side bandwidth parameters determined by the receiver in response to receiving the series of data packets, determining, by the sender, round trip delay data based on a sender-side time stamp difference of sending and receiving of the series of data packets, adjusting, by the sender using the processor, the current bitrate for encoding the video bitstream based on the receiver-side bandwidth indicators and the roundtrip delay data, and transmitting, to the receiver, a second portion of the video bitstream encoded using the adjusted current bitrate.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of the U.S. patent application "Video Coding and Decoding with Backchannel Message Management" (Application No. 14 / 982698, filed on December 29, 2015), and the aforementioned patent The application itself is a partial continuation application of the US patent application "Method and System for Video Processing with Back-Channel Message Management" (Application No. 14 / 867143, filed on September 28, 2015). The entire contents of the aforementioned two applications are hereby incorporated herein by reference. technical field [0003] The present invention relates to video encoding and decoding, and more particularly, to video encoding and decoding using backchannel messages for initial bandwidth estimation and bandwidth adjustment in real-time video transmission. Background technique [0004] A digital video bitstream can be encoded to effectively compress the video into a digi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/262H04N21/2385H04N19/146
CPCH04N19/146H04N21/2385H04N21/26216
Inventor 谷群山
Owner ALIPAY (HANGZHOU) INFORMATION TECH CO LTD