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Satellite digital TV receiving apparatus and receiving method

A technology of satellite digital TV and receiving equipment, applied in the field of satellite digital TV system, can solve the problems of satellite users being easy to receive illegal programs, poor security, difficult to manage, etc., so as to improve channel utilization, improve security, and save bandwidth. Effect

Inactive Publication Date: 2005-12-21
CENT ACADEME OF SVA GROUP
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AI Technical Summary

Problems solved by technology

[0011] Poor security: MPEG2 is a mature video and audio codec technology in the world, and the threshold for mastering this technology is low; there are many illegal set-top boxes on the market, and there are a lot of private installations; if the satellite transponder is attacked by criminals, satellite users can easily receive illegal program, difficult to manage

Method used

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  • Satellite digital TV receiving apparatus and receiving method
  • Satellite digital TV receiving apparatus and receiving method
  • Satellite digital TV receiving apparatus and receiving method

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The present invention provides a satellite digital TV receiving device, the block diagram of an embodiment of which is as follows image 3 shown, including:

[0032] The front-end processing module 302 receives satellite radio frequency signals, converts them into I and Q band signals, and outputs a Transport Stream (TS) code stream after channel demodulation. According to an embodiment of the present invention, the front-end processing module 302 includes:

[0033] The tuner 304 converts the received satellite radio frequency signal into I and Q band signals; and

[0034] The channel demodulation device 306 is connected with the tuning device 304, and performs channel demodulation on I and Q band signals. The channel demodulation device 306 generally includes: a demodulation device 308, which is connected with the t...

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PUM

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Abstract

Receiving radio frequency signal from satellite, the pre-processing module converts the received signal to signal in I, Q wave bands. Passing through channel demodulation, the signal in I, Q wave bands are outputted as code stream of transmission stream (TS). Received by the processing module at back end, the TS code stream through message source decoding is turned to output video stream and audio stream. The control module including the processing module at back-end and the processing module at front-end implements the above said operation. AVS standard compression is adopted to save bandwidth. Under same bandwidth of satellite transponder, comparing with prior art, the invention raises number of transmitted satellite channel to more than two times. The invention also raises security since all new encoding and decoding technique of AVS with complex algorithm difficult for lawbreaker to be managed.

Description

technical field [0001] The present invention relates to a satellite digital TV system, more specifically, to a satellite digital TV receiving device and a receiving method thereof. Background technique [0002] In the satellite digital TV system, the entire satellite digital TV system is composed of the transmitting end, the forwarding satellite, the signal receiving and the user terminal equipment, and its general structure is as follows: [0003] Sender: Reference figure 1 The basic structure diagram of the sending end is shown, and the sending end is divided into two parts, one part is the signal formation, that is, the source coding and multiplexing part, that is, the source encoder 102 in the figure, which receives the original data of video, audio and other data . The other part is signal transmission, that is, channel coding and digital modulation, including multiplexer 104 , encoder 106 , modulator 108 and transmitting station 110 in the figure. The coding scheme ...

Claims

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Application Information

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IPC IPC(8): H04N21/434
Inventor 董峰张钰何平曹文锋王瑜王国中侯钢
Owner CENT ACADEME OF SVA GROUP
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