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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
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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, which cannot meet the requirements of multiple multimedia programs for fast, reliable, and reliable transmission. Requirements for flexible and efficient program distribution, power saving and confidentiality

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

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

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

[0075] Since 1994, our country has also started the research work of high-definition television. And in 1998 successfully developed China's first generation of high-definition TV function prototype. Chinese experts organized by the radio and television authority and the State Administration of Radio, Film and Television have formulated digital TV and digital high-definition TV standards. Tsinghua University's Digital Mul...

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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, ...

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Application Information

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