Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Image compression method and device integrating hybrid coding and wordbook coding

A hybrid coding and image compression technology, applied in image communication, digital video signal modification, television, etc., can solve problems such as image layering or inaccurate block classification

Inactive Publication Date: 2010-08-18
TONGJI UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an image compression method and device integrating hybrid coding and dictionary coding, which solves the problems of image layering or inaccurate block classification in the compression of composite images in traditional image compression methods

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
  • Image compression method and device integrating hybrid coding and wordbook coding
  • Image compression method and device integrating hybrid coding and wordbook coding
  • Image compression method and device integrating hybrid coding and wordbook coding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0101] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0102] Both text / graphics and natural images have their own relatively mature compression methods. At present, H.264 based on the hybrid coding framework is the most effective method for natural video compression, and for text / graphics, Gzip compression based on the LZ (Lempel-Ziv) dictionary coding algorithm is undoubtedly a very effective method, the present embodiment Adopt H.264 and Gzip self-adaptive method to compress composite image, concrete compression process is as shown in Figure 9, comprises the following steps:

[0103] (1) Divide the image into multiple non-overlapping 16x16 macroblocks.

[0104] (2) For each macroblock, use H.264 and Gzip to compress respectively.

[0105] (3) In H.264 and Gzip, the compressed data generated by the method with fewer compressed bits is selected and put into the compressed code stream.

[0106] (4) Repea...

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 relates to an image compression method and a device with the integration of hybrid coding and dictionary coding, each macroblock is respectively compressed by adopting the hybrid coding method and the dictionary coding method, and compressed data which is generated by the method with fewer coding bits is finally selected to be placed in a compressed code stream. When the dictionary coding method is used for compressing each macroblock, the use of one of the following two methods can effectively improve the compression performance of an image: (1) the latest R (R is the number ofdata which is larger than one macroblock) bytes of data of the original image is taken as a dictionary. (2) the latest R (R is the number of data which is larger than one macroblock) bytes of data ofthe recovered image is taken as the dictionary. Compared with the prior art, the invention avoids the degradation of the compression performance of the past literature caused by image stratification or inaccurate block classification and improves the compression performance of the whole composite image compression method.

Description

technical field [0001] The invention relates to the relevant technical field of computer image compression, in particular to an image compression method and device integrating hybrid coding and dictionary coding. Background technique [0002] With the rapid development of network information technology, the interconnection between multiple computers and between hosts and other digital devices has become a reality and has become a development trend. This makes real-time screen transmission from server to client an urgent need. Due to the large amount of screen video data that needs to be transmitted, taking a 24-bit true-color screen image of 1280x1024 size as an example, the data that needs to be transmitted at 60 frames per second exceeds 200M bytes. If so much data needs to be transmitted under the current network conditions Achieving real-time transmission is impossible, so efficient data compression is essential. [0003] The prominent feature of computer screen images...

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): H04N7/26H04N7/32H04N19/13H04N19/176H04N19/503H04N19/56
Inventor 林涛王淑慧
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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