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

Interactive digital multimedia cable TV system

A technology of TV broadcasting and broadcasting system, applied in the direction of high-definition television system, two-way working system, cable transmission adaptation, etc.

Inactive Publication Date: 2003-02-19
TSINGHUA UNIV
View PDF3 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, COFDM uses iterative approximation algorithm, which has problems of convergence error and convergence 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
  • Interactive digital multimedia cable TV system
  • Interactive digital multimedia cable TV system
  • Interactive digital multimedia cable TV system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] The invention proposes an interactive wired digital multimedia television broadcast transmission method and system. It is designed to provide media services in cable television systems, including HDTV, audio, video, data broadcasting, and interactive multimedia services. Uplink 20Mb / s payload transmission code rate; highly flexible operation mode: by selecting different modulation schemes, the system can support services with different transmission conditions; high reliability: can resist pulse interference and reflection caused by mismatch; Excellent network security: Encryption and authorization control at the physical transport layer; support multiple transport / network protocols, easy to interface with other broadcast and communication systems, such as MPEG2, ATM and IP protocol sets; use proprietary technology to reduce peak Average power ratio; multiple operating modes, compatible with European DVB-C standard.

[0045] The main object of the present invention is c...

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

Interactive wire digit multimedia TV broadcast system characterizes that it is one of any broadcast systems of single or two-way, interactive independer of interactive channels. The down-stream interactive signals are applied of the down-stream channel TDS-OFDM while the up-line interactive signals are in the up-line channel of CDMA TDS-OFDM. The interactive interface of broadcast channel and interactive channel or the common interface of single way broadcast system independent of interactive channel are the top box nulti-transfer network protocols and compatible with Europen DVB-C standard.

Description

technical field [0001] An interactive cable digital multimedia television broadcasting system belongs to the technical field of digital information transmission, and in particular relates to an interactive cable digital multimedia / TV broadcasting (Interactive Cable Digital Multimedia / TV Broadcasting, DMB-IC) technical field. Background technique [0002] Due to multipath interference and distortion during the retransmission process of the information sequence, the signal generated by linear convolution will produce time dispersion and intersymbol interference (ISI). [0003] Currently, there are two effective technologies for eliminating intersymbol interference: time-domain equalization and orthogonal frequency division multiplexing (OFDM). Time-domain equalizer technology is relatively mature and widely used in various communication fields, but its structure is complex and costly; and it is only effective for ISI with short delay. When the delay of intersymbol interferenc...

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): H04N7/10H04N7/173
Inventor 杨林杨知行
Owner TSINGHUA 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