Real time decreased resolution conversion method and device for JPEG2000 compression code stream

A technology for compressing code streams and reducing resolution, which is applied in the field of VLSI implementation devices, and can solve problems such as the inability to complete compressed code streams and reduce resolution conversions in real time

Inactive Publication Date: 2008-02-13
INST OF COMPUTING TECH CHINESE ACAD OF SCI
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a real-time down-resolution conversion method and device for JPEG2000 compressed code streams, so as to overcome the defect that the existing JPEG2000 decoding equipment cannot complete the down-resolution conversion of compressed code streams in real time

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
  • Real time decreased resolution conversion method and device for JPEG2000 compression code stream
  • Real time decreased resolution conversion method and device for JPEG2000 compression code stream
  • Real time decreased resolution conversion method and device for JPEG2000 compression code stream

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] In order to make the purpose, technical solution and advantages of the present invention clearer, a method and device for reducing the resolution of a JPEG2000 compressed code stream according to the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0074] Before describing the real-time down-resolution converting method of the JPEG2000 compressed code stream of the present invention, the JPEG2000 compressed code stream (code stream) stipulated in the JPEG2000 standard is firstly described. As shown in Figure 1, the compressed code stream conforming to the JPEG2000 standard includes 5 parts: the main header (header), multiple color components 0, multiple color components 1, multiple color components 2, and the end of the code stream (End OfCodestr...

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 real-time descending resolution conversion method and a device for JPEG2000 compression bit stream. The method includes the following steps: step A. the invention detects inputted JPEG2000 compression bit stream, extracts bit stream and modifies effective information of a main header and a splicing block in color component/part of the header of the splicing block, detects each splicing block/part of the header of the splicing block and an encoding data packet, throws away the splicing block containing high resolution information/ part of the header of the splicing block and the encoding data packet, and produces output compression bit stream with low resolution. The invention has the characteristics by high real-time performance and good expansion.

Description

technical field [0001] The invention relates to the field of image compression processing, in particular to a JPEG2000 compressed code stream resolution reduction conversion method and a corresponding very large scale integrated circuit (VLSI) implementation device. Background technique [0002] With the development of multimedia technology and computer science, image compression and decompression functions have become an essential function of various multimedia devices. At present, JPEG2000 is widely used as a compression method in many practical devices, such as digital cameras and medical image devices, to compress and decompress images. [0003] The full name of JPEG is Joint Photographic Experts Group, which is a committee engaged in the formulation of still image compression standards under the International Standards Organization (ISO). It formulated the first set of international still image compression standards: ISO 10918-1 is what we commonly call JPEG. Due to t...

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 Applications(China)
IPC IPC(8): H04N7/26H04N19/42
Inventor 李玲郭勐王贞松
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap