Satellite digital video broadcast receiving circuit and signal receiving method thereof

A digital video broadcasting and receiving circuit technology, which is applied in the field of satellite digital video broadcasting, can solve the problem of high cost of DVB-S system installation
CN101312508AInactive Publication Date: 2008-11-26MSTAR SEMICON INC
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
MSTAR SEMICON INC
Publication Date
2008-11-26
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a digital video broadcasting (DVB-S) receiving circuit with multiple inputs and a signal receiving method, which can receive the planet input signals provided by a plurality of low noise frequency alias demultiplier (LNB), to reduce the construction cost of the DVB-S system. The DVB-S receiving circuit comprises a selecting circuit and a bonding device, wherein the selecting circuit comprises a plurality of signal paths for receiving and transmitting a plurality of planet input signals, the selecting circuit triggers one of the signal paths according to a control signal to output one of the planet input signals, the bonding device bonds the signal paths into a single path to be connected with a DVB-S turner for following treatment.
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Description

technical field

[0001] The invention relates to a Digital Video Broadcasting-Satellite (DVB-S for short), especially a DVB-S receiving circuit with multiple input terminals and a signal receiving method thereof. Background technique

[0002] Satellite digital video broadcasting is a widely used digital satellite TV transmission specification. For each satellite channel signal (usually a video of a different channel), it is first down-converted by a low noise block (LNB) , and then sent to individual DVB-S receivers for subsequent processing. FIG. 1A is a structure diagram of a DVB-S system in the background technology, which receives signals from two different satellites through antennas 14, 19 and LNBs 12, 13, and sends them to DVB-S receivers 10, 11 respectively. In other words, the satellite signals received by each LNB need to be processed by a separate DVB-S receiver, which results in a high cost of setting up the DVB-S system.

[0003] For example, when setting up a ...

Claims

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