Conditional Access System For Each Transmitter In Single Frequency Network, And A Method Thereof
First Claim
1. A conditional access system for a transmitter in a single frequency network for terrestrial and satellite digital broadcasting, the conditional access system comprising:
- a main broadcasting system for transmitting encoded broadcasting signals including a data stream and transmitter identification information (TII) through a main broadcasting network;
a repeating system for amplifying and transmitting encoded broadcasting signals of the main broadcasting network, or modulating and amplifying a stream input by the main broadcasting system through a private line, allocating a repeating system TIL value to be different from the main broadcasting system TII value and repeating broadcasting signals of the main broadcasting system through a repeating network;
a subscriber station for decoding the encoded signals of the main broadcasting network included in the broadcasting signals received through the main broadcasting network or the repeating network, transmitter identification information (TII), and an encoding key according to a predetermined decoding method; and
a decoding key provider for authenticating a user and transmitting the decoding key to a charged subscriber station through a mobile communication network,wherein the charged subscriber in the repeating network coverage stores the decoding key transmitted from the decoding key provider and decodes the broadcasting signals using the decoding key corresponding to the repeating system TII value.
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Accused Products
Abstract
The conditional access system in a single frequency network in a digital broadcasting system includes a main broadcasting system transmitting encoded broadcasting signals including a data stream and transmitter identification information (TII) through a main broadcasting network; a repeating system amplifying and transmitting encoded broadcasting signals of the main broadcasting network, or modulating and amplifying a stream input by the main broadcasting system through a cable, and repeating broadcasting signals of the main broadcasting system through a repeating network; a subscriber station decoding the encoded signals of the main broadcasting network included in the broadcasting signals received through the main broadcasting network or the repeating network, TII, and an encoding key according to a decoding method; and a decoding key provider receiving a decoding key from the main broadcasting or repeating system, authenticating a user, and transmitting the decoding key to a charged subscriber station through a mobile communication network.
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Citations
36 Claims
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1. A conditional access system for a transmitter in a single frequency network for terrestrial and satellite digital broadcasting, the conditional access system comprising:
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a main broadcasting system for transmitting encoded broadcasting signals including a data stream and transmitter identification information (TII) through a main broadcasting network; a repeating system for amplifying and transmitting encoded broadcasting signals of the main broadcasting network, or modulating and amplifying a stream input by the main broadcasting system through a private line, allocating a repeating system TIL value to be different from the main broadcasting system TII value and repeating broadcasting signals of the main broadcasting system through a repeating network; a subscriber station for decoding the encoded signals of the main broadcasting network included in the broadcasting signals received through the main broadcasting network or the repeating network, transmitter identification information (TII), and an encoding key according to a predetermined decoding method; and a decoding key provider for authenticating a user and transmitting the decoding key to a charged subscriber station through a mobile communication network, wherein the charged subscriber in the repeating network coverage stores the decoding key transmitted from the decoding key provider and decodes the broadcasting signals using the decoding key corresponding to the repeating system TII value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A conditional access subscriber station for a transmitter in a single frequency network for terrestrial and satellite digital broadcasting, the conditional access subscriber station comprising:
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an OFDM demodulator for selecting a channel when encoded broadcast signals are received through an antenna, and converting the received broadcast signals into OFDM signals; a TII extractor for extracting a TII signal and an encoded key from the OFDM signals; a key table for searching for a key value according to stored TII values; a DAB de-ensembler for dividing the OFDM demodulated broadcasting signals into DAB data and MPEG2 TS data signals; a network identification (NIS) decoder for combining three keys (main broadcasting station TII, repeater station Tll, and a decoding key) for decoding the received encoded broadcasting signals according to the TII by using the key table or an ID of a subscriber station, and decoding the MPEG2 TS data signals output by the DAB de-ensembler; and a multimedia processing module for processing the decoded MPEG2 TS data or DAB data to be displayable. - View Dependent Claims (26)
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27. A conditional access method for a transmitter by a charged subscriber in a single frequency network for terrestrial and satellite digital broadcasting, the conditional access method comprising;
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a) a charged subscriber receiving broadcasting signals including a data stream and transmitter identification information (Tip; b) searching a Tl(key table to find a corresponding key value depending on the cases of a receiver for exclusive use and a wireless communication combined receiver; c) applying TII of the main broadcasting network or the repeating network and an encoding key value so as to descramble the data stream; d) checking whether the data stream can be descrambled and decoded; e) the charged subscriber receiving a decoding key through a mobile communication network when the data stream cannot be descrambled and decoded; and f) decoding the data stream and receiving broadcasting signals when the data stream can be decoded, wherein the charged subscriber decodes the data stream using the decoding key corresponding to TII of the repeating network. - View Dependent Claims (28, 29)
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30. A conditional access method for a transmitter by an uncharged subscriber in a single frequency network for terrestrial and satellite digital broadcasting, the conditional access method comprising:
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a) an uncharged subscriber receiving broadcasting signals including a data stream and transmitter identification Information (TII); b) using the TII as a key value so as to descramble the data stream; c) checking whether the data stream can be descrambled and decoded; d) decoding the data stream and receiving broadcasting signals when the data stream can be decoded; and e) conditionally controlling receiving of the broadcasting signals when the uncharged subscriber'"'"'s terminal is handed off from the main broadcasting network to the repeating network. - View Dependent Claims (31, 32, 33, 34, 35)
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36. A conditional access system for a transmitter in a single frequency network for terrestrial and satellite digital broadcasting, the conditional access system comprising:
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a main broadcasting system for transmitting encoded broadcasting signals including a data stream and transmitter identification information (TII) through a main broadcasting network; a repeating system for amplifying and transmitting encoded broadcasting signals of the main broadcasting network, or modulating and amplifying a stream input by the main broadcasting system through a private line, allocating a repeating system TII value to be different from the main broadcasting system III value and repeating broadcasting signals of the main broadcasting system through a repeating network; and a decoding key provider for authenticating a user and transmitting the decoding key to a charged subscriber station through a mobile communication network, wherein the decoding key corresponds to the repeating system TII value.
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Specification