Network-estabilishing method and system for ground digital videocast single-frequency network |
Title： |
| Network-estabilishing method and system for ground digital videocast single-frequency network |
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Application Number： |
200610113120 |
Application Date： |
2006/09/15 |
Announcement Date： |
2007/02/28 |
Pub. Date： |
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Publication Number： |
1921623 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H04N 7/22 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Yang Hui, Pan Zhangyong, Yang Zhihang, Song Jian, Wang Jun, Wang Jintao |
Key Words： |
videocast single-frequency network, network-estabilishing method, system |
Abstract： |
The invention relates to a ground digit television broadcast single-frequency network technique. Wherein, the invention is characterized in that: it uses radio signal light transmission technique, to transmit the coded and standardized radio signal via wire television optical fiber to the city; at the shade area needed cover, extracting out signal via time delay match to emit at small power; and the optical fiber transmits the demodulated signal, therefore, the emitting point can avoid carrier wave and clock return, only with time delay adjustment. The invention can cover the shade area quickly at lower cost. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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