Time-frequency matrix two-dimensional channel dynamic allocation method in multimedia information transmission

A technology of multimedia information and dynamic distribution, applied in the field of digital information transmission, can solve the problems of fast and reliable transmission of multiple multimedia programs, flexible and efficient program distribution, power saving and confidentiality, etc.

Inactive Publication Date: 2005-04-06
TSINGHUA UNIV
View PDF3 Cites 53 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0033] To sum up the above, the three existing international standards for terrestrial digital TV broadcasting, the three DTTB systems are all designed for traditional continuous bit stream transmission, wh

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
  • Time-frequency matrix two-dimensional channel dynamic allocation method in multimedia information transmission
  • Time-frequency matrix two-dimensional channel dynamic allocation method in multimedia information transmission
  • Time-frequency matrix two-dimensional channel dynamic allocation method in multimedia information transmission

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0073] The present invention provides a time-frequency matrix (Time-Frequency Matrix, TFM) two-dimensional channel dynamic allocation method, in the time domain synchronous orthogonal frequency division multiplexing, namely TDS-OFDM, the system adopts two-dimensional time domain-frequency Domain channel allocation method to meet the flexible, high-efficiency, low-power, and real-time requirements of multimedia programs.

[0074] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0075] Since 1994, my country has also started research on high-definition television. And in 1998 successfully developed China's first-generation high-definition TV functional prototype. The competent authority of radio and television and the State Administration of Radio, Film and Television organized Chinese experts to formulate digital TV and digital high-definition television standards. Tsinghua University’s Digital Mult...

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

It is a multimedia information transmission time frequency matrix two-dimensional sub-channel dynamic alignment method, which belongs to digit information transmission technique field and comprises the following steps: to generate two-dimensional time zone and frequency zone matrix TFM channel alignment pattern according to certain rules; to align the multimedia program code flow input to the relative TDS-OFDM signal frame and OFDM sub-carrier wave according to the alignment pattern; to insert TFMp matrix information into the head frame group of TDS-OFDM; finally to send the complete signal of TDS-OFDM.

Description

technical field [0001] The invention belongs to the technical field of digital information transmission, and in particular relates to a time-frequency matrix (Time-Frequency Matrix, TFM) two-dimensional channel dynamic allocation method in multimedia information transmission using an Orthogonal Frequency Division Multiplexing (OFDM) multi-carrier modulation technology. Background technique [0002] Today's world has entered the information age, the society's demand for information has increased sharply and the functions of the information society have changed significantly, making the research and development of multimedia an inevitable trend of the times, and it has been more and more widely used. [0003] Multimedia is a new type of information technology that integrates data, text, sound, music, animation, video, images and other media into one, and realizes human-computer interactive information exchange and dissemination through digital processing. When people acquire, ...

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
IPC IPC(8): H04J4/00H04L27/26H04L29/06
Inventor 杨知行兰军
Owner TSINGHUA UNIV
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