Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A video coding rate control method and system

A bit rate control and video coding technology, which is applied in the field of image processing, can solve the problem that the length of slice time cannot fully reflect the dynamics of video images, etc., achieve the effect of high picture clarity and coherence, and improve the quality of video coding

Active Publication Date: 2018-04-06
CHINA TELECOM CORP LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to adapt to the dynamic adaptive streaming mechanism of HTTP, the time length of stream slices of different code rates is fixed, and the size of stream slices of the same code rate is fixed. Since the current MBR technology uses a code rate based on CBR (constant code rate) The control method, which pre-encodes to generate a variety of code streams with different bit rates, cannot fully reflect the dynamics of video images in combination with the slice time length

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A video coding rate control method and system
  • A video coding rate control method and system
  • A video coding rate control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0077] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0078] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0079] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0080] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authoriz...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method and a system for controlling video encoding rate. The method includes: according to the slice time length T and the average code rate R of the code stream, calculate the allocatable bits T×R obtained by the corresponding slice; respectively calculate the coded I, B and P frames to obtain the frame or macroblock rate R(Qi); Calculate the interframe distortion according to the rate R(Qi), and obtain the quantization level parameter corresponding to the minimum interframe distortion of the entire video sequence, and determine the allocated GOP bits according to the quantization level parameter. The invention fully embodies the dynamics of the video picture content within the slice time length, and improves the video coding quality.

Description

technical field [0001] The invention belongs to the field of image processing, and in particular relates to a method and system for controlling video coding rate. Background technique [0002] At present, the OTT video system uses the HTTP dynamic adaptive streaming protocol to implement the flow control mechanism at the application layer, and provides a variety of code streams with different bitrates through MBR (Multiple Bitrate) technology, and slices them to adapt to different users and network conditions. Customers The end automatically selects slices of different bit rates for download, realizing smooth switching of videos of different quality levels, and improving the user's video playback experience. [0003] In order to adapt to the dynamic adaptive streaming mechanism of HTTP, the time length of stream slices of different code rates is fixed, and the size of stream slices of the same code rate is fixed. Since the current MBR technology uses a code rate based on CBR...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/134H04N19/124H04N19/154
Inventor 罗传飞赵学军杨征蒋力
Owner CHINA TELECOM CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com