KR0174923B1 - Method and apparatus for selecting copy in direct broadcasting satellite receiver - Google Patents

Abstract

The present invention relates to a copy selection apparatus and method of a DBS receiver capable of selectively transmitting (copying) a broadcast signal received by a digital DBS to a storage medium. To solve this problem, a broadcast channel tuning command and a copy mode are provided. Command information means for applying a selection command or the like, and in response to a broadcast channel tuning command and a copy mode selection command, copy information in the digital packet data in the stream packet unit of the tuned broadcast channel is retrieved. It consists of a microprocessor for outputting a switching signal corresponding to the copy mode of the tuned broadcast channel, and a multiplexer for switching digital data provided from the MPEG2 system demux based on the copy mode switching signal of the microprocessor. Copy to storage media for more efficient use on personal computers or other digital devices There is an effect that can apply image and voice data.

Description

Copy Selecting Device and Method of DVD Receiver

1 is a block diagram showing a copy selection device of a DBS receiver according to the present invention.

2 is a flowchart for explaining the operation of the copy selection method of the DBS receiver according to the present invention.

3 (a) to 3 (f) are diagrams for explaining packet data according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

100: tuner 102: channel decoder

104: descrambler 106: MEPG2 system demux

108: video decoder 110: audio decoder

112: modem 114: smart card

116 memory 118: instruction permitting unit

120: microprocessor 122: multiplexer

124: recording medium

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for receiving a direct broadcast satellite (DBS), and more particularly, to record (copy) by selectively transmitting a broadcast signal (video and audio) received through a digital DBS to a storage medium. The present invention relates to a copy selection device and a method of a DBS receiver.

In general, paid broadcasts are mainly used for commercial subscribers by CATV in the US, BS, CS in Japan, PAY CABLE TV broadcasting by terrestrial waves in France, and recently by satellite communication broadcasting by BS and CS. It is possible to watch on a broadcast program and broadcast on a scramble (Scramble) electrically to the non-contractor.

In order to receive such scrambled broadcasts, the subscriber pays the fee to the program provider in advance or after a month or for a specific period, and the program provider gives the subscriber the right to watch at any time during the broadcast period of the channel. do.

This viewing authorization is achieved by the program provider providing a key value to descramble the program of the channel to the smart card in the subscriber's Integrated Reciver Decorder (IRD).

On the other hand, in satellite broadcasting, there is a service called PPV (Pay Per View) in addition to the monthly view as described above, there is a method for the user to selectively watch only a specific program of the future broadcast and pay a fee for it.

In order to view the PPV program, a purchase signal for purchasing the program is transmitted to the program provider through an integrated receiving decoder (IRD), and the program provider grants the program viewing right to the integrated receiving decoder (IRD) according to the needs of the subscriber. The fare information is recorded on the smart card in the integrated reception decoder (IRD).

In purchasing such a PPV program, an essential password is a value that a subscriber must input when applying for a PPV to prevent a third party from purchasing an expensive PPV program arbitrarily.

On the contrary, in the case of free broadcasting rather than paid broadcasting, viewers who want a program can watch regardless of the fee.

For example, in the case of a satellite broadcast program that has been signal processing as an existing analog signal, the broadcast program can be recorded using a VCR system or the like while watching the broadcast.

The video and audio signals of the broadcast program recorded (recorded) are used only in an analog signal arbitrarily limited technical field. In other words, in order to use the recorded broadcast video and audio in a personal computer or various digital devices, the digitalized signal must be converted again by a conversion device. Will be.

Accordingly, the present invention is to meet the digital satellite broadcasting, an object of the present invention is to copy the DBS receiver that can directly record (copy) to a digital storage medium with reference to the copy information included in the broadcast signal received as a digital signal To provide a selection device.

Another object of the present invention is to provide a copy selection method of a DBS receiver capable of directly recording (copying) to a digital storage medium by referring to copy information included in a broadcast signal received as a digital signal.

According to the present invention for achieving the above object, an MPEG2 system demux for receiving a satellite broadcast program and converting a channel decoded and descrambled broadcast channel into stream packetized data, the image and the packetized data In the DBS receiving apparatus having a modem, a mark card, etc. for restoring by voice and transmitting and receiving usage information in connection with the restoration,

A command approving unit for approving a broadcast channel tuning command and a copy mode (A / V, A, V) selection command according to the broadcast channel tuning command or the like;

Responsive to a broadcast channel selection command and a copy mode (A / V, A, V) selection command of the command granting unit, the copy information in the stream packet unit digital data of the selected broadcast channel is retrieved, and the retrieved copy information is retrieved. A microprocessor for outputting a switching signal corresponding to a copy mode provided from the command applying unit on the basis of a?

And a multiplexer for switching the stream packetized digital data provided from the MPEG2 system demux based on the copy mode switching signal of the microprocessor and delivered to the recording medium.

In addition, the MPEG2 system demux for receiving a channel broadcast program and converting a channel decoded and descrambled broadcast channel into stream packetized data, restores the packetized data to video and audio, In the DBS receiving method having a modem and a smart card for transmitting and receiving usage information,

A broadcast channel tuning command and a copy mode (A / V, A, V) selection command corresponding to the broadcast channel tuning command are inputted, and the stream packet unit digital of the broadcast channel and the broadcast channel tuned in accordance with the tuning channel tuning command is input. First steps 201 to 203 for acquiring data and retrieving free and paid copy information from the acquired data;

A second step (204 to 205) of determining whether the copy information is paid copy information if it is determined that the search result is not free copy information;

If it is determined in the second step as paid copy information, the possibility of copying is determined based on the rate information for this broadcast channel pro, and if the copy is possible as a result of this determination, it is authorized from the command authorizing unit 118. And a third step (206 to 207) for outputting a switching signal corresponding to the predetermined copy mode.

In more detail, when it is determined that the free copy information is the search result of the first step, a switching signal corresponding to a predetermined copy mode for the tuned broadcast channel is output.

Hereinafter, the present invention will be described in detail with reference to the illustrated drawings.

FIG. 1 is a block diagram illustrating a copy selection apparatus of a DBS receiver according to the present invention, and FIG. 2 is a flowchart illustrating the operation of the copy selection method of the DBS receiver according to the present invention.

Referring to FIG. 1, the copy selector of the DBS receiver of the present invention includes a tuner 100, a channel decoder 102, a descrambler 104, an MPEG2 system demux 106, a video and audio decoder 108 ( 110, a modem 112, a smart card 114, a memory 116, an instruction applier 118, a microprocessor 120, a multiplexer 122, and a recording medium 124.

The tuner 100 is connected to the satellite antenna 10 and tunes (tunes) the broadcast signal received from the satellite antenna 10 based on the broadcast channel tuning signal of the microprocessor 120 to be described later. Configured to be provided at 102.

The channel decoder 102 transmits a predetermined broadcast band (eg, third channel) among channels (eg, third channel (a)) of each broadcasting division time-division multiplexed (TDM) channel tuned by the tuner 100 and input. (B)) to decode the channel and provide it to the MPEG2 system demux 106 described later.

The MPEG2 system demuxer 106 uses the standardized and standardized MPEG2 to decode the decoded stream sequence data (TP) provided from the channel decoder 102 to video (VPES) and audio (APES) audio elementary sytream. And divided into packet units (for example, FIGS. 3C to 3D) and provided to the multiplexer 122, the video decoder, and the audio decoder 108 and 110, which will be described later.

When the broadcast channel provided from the channel decoder 102 is scrambled, the descrambler 104 is configured to be provided to the MPEG2 system demux 106 which describes a signal to descramble it. The key value is recorded and used in the smart card 114 via the modem 112.

The video decoder 108 is a video packet unit (e.g., FIG. 3 (c), video PES) among scrim packet united (e.g., FIG. 3 (b)) digital data provided from the MPEG2 system demux 106. And a reconstructed image obtained by decoding the converted digital data is output to a monitor (CRT).

The audio decoder 110 is a reconstructed voice obtained by decoding the digital data of the audio packet unit (e.g., FIG. 3 (d), audio PES) from the stream packetized digital data provided from the MPEG2 system demux 106. It is configured to output to the speaker (SP).

The modem 112 is connected to the receiving device PSTN of the program provider, and interfaced with the receiving device PSTN of the program provider according to a control signal of the microprocessor 120 to be described later. Information is provided to the microprocessor 120 and the smart card 114.

The smart card 114 is configured to receive and store a key value through the modem 112 based on a control command of the microprocessor 120 described later.

The memory 116 is configured to include various program logic for executing the apparatus, and to provide program logic to the microprocessor 120 as necessary.

The command applier 118 is configured to apply a broadcast channel tuning command and a copy mode (A / V, A, V) selection command according to the broadcast channel tuning command to be provided to the microprocessor 120 described later.

The microprocessor 120, in response to the broadcast channel selection command and the copy mode (A / V, A, V) selection command of the command authorizing unit 118, copies in the stream packet unit digital data of the tuned broadcast channel. Retrieves information, and outputs a switching signal corresponding to an applied copy mode from the command applier 118 based on the search result, and provides overall operation of the apparatus. To control.

The multiplexer 122 selectively switches the stream packetized digital data provided from the MPEG2 system demux 106 and transferred to the recording medium 124 described later based on the copy mode switching signal of the microprocessor 120. It is configured to.

The recording medium 124 refers to a recording medium capable of storing and restoring digital data of a packet-based video and audio signal provided from the multiplexer 122. The recording medium 124 includes a video cassette, a CD-ROM, and the like.

In addition, the recording medium 124 is configured to be connected to the external output terminal of the apparatus to use the recorded digital data in other applications.

The present invention configured as described above will be described in detail with reference to Examples.

The user authorizes a broadcast channel tuning command and a copy mode (A / V, A, V) selection command according to the broadcast channel tuning command using the command granting unit 118 to provide the microprocessor 120.

The microprocessor 120 applies the broadcast channel frequency corresponding to the broadcast channel tuning command input through the command applier 118 to the tuner 100.

Accordingly, the tuner 100 tunes a predetermined broadcast channel band among the broadcast channel frequency bands of the time division multiplexed broadcasters received through the satellite antenna 10 and then provides the channel decoder 102 to the channel decoder 102.

In this case, the predetermined broadcast channel corresponds to the broadcast channel frequency provided from the microprocessor 120.

That is, when the tuner 100 is input to the tuner 100 in the form of KBS, SBS, MBC, KBS, SBS, MBC, as shown in FIG. 3 (a), the microprocessor 118 in the tuner 100. For example, the KBS broadcast signal is tuned and output to the channel decoder 102.

Accordingly, the channel decoder 102 decodes the broadcasting channel frequency (KBS) provided through the tuner 100 and extracts the digital data extracted as an MPEG2 transport (TP) stream, that is, FIG. 3 (b) from the MPEG2 system demux. To 106.

At the same time, when the broadcast channel provided from the channel decoder 102 is scrambled, the descrambler 104 provides a signal for descrambler to the MPEG2 system demux 106, thereby providing the channel decoder 102 with the signal. The decoded broadcast channel is descrambled to restore a normal broadcast signal.

Accordingly, in the MPEG2 system demux 106, the digital data of the broadcast channel decoded and descrambled by the channel decoder 102 and the descrambler 104 is displayed as shown in FIGS. 3C and 3D. The video elementary stream (VPES) and audio (Audio Elementary Stream: APES) packetized data are separated and provided to the video and audio decoders 108 and 110 and the multiplexer 122.

At this time, the video and audio decoders 108 and 110 perform digital processing of the broadcast channel provided from the MPEG2 system demux 106 based on the broadcast channel permission control signal provided from the microprocessor 120 through the line 2. The data is decoded and then output to the monitor (CRT) and the speaker (SP).

On the contrary, if a control signal is applied that does not allow the output of video and audio provided from the microprocessor 120, the digital data of the broadcast channel provided from the MPEG2 system demux 106 is not decoded.

For example, the output of a control signal of allowing and disallowing a broadcast signal from the microprocessor 120 may be determined as information included in packet data provided from the MPEG2 system demux 106.

If the information contained in the packet data is determined to be free satellite broadcasting, a permission signal is output, and in the case of paid satellite broadcasting, broadcasting is allowed according to the billed amount of the smart card 114 connected to the microprocessor 120. The control signal is outputted by determining.

Subsequently, the user may wish to copy or copy the video and audio signals to the recording medium 124 for the satellite broadcast program.

Referring to FIG. 2, first, in step 201, a command for selecting a broadcast channel and a copy mode (A / V, A, V) selection command according to the broadcast channel tuning command are issued through the command applier 118. Provided by 120.

The microprocessor 120 tunes the broadcast channel on the basis of the input broadcast channel, obtains digital data in stream packetized units by the step 202, and then frees the data from the obtained data. The paid copy information is retrieved (step 203).

As a result of the search in step 230, if it is determined that the free copy information (e.g., FIG. 3 (e), 0) is not included in the stream packetized data of the tuned broadcast channel, the copy information is next Proceed to step 205 to determine whether the paid copy information.

In step 205, if it is determined that the paid copy information (e.g., FIG. 3 (f), 1) is not included in the stream packetized data of the tuned broadcast channel, the flow proceeds to step 208, where the user is unable to copy. At the same time, the copy mode ends.

If it is determined in step 205 that the paid copy information (e.g., FIG. 3 (f), 1) is included in the stream packetized data of the broadcast channel selected in step 205, proceed to step 206 and the fee for this broadcast channel pro. The possibility of copying is determined based on the information.

This is determined based on the available fee information of the user in the smart card 114, for example, if the available fee information is small, it is impossible to copy the tuned broadcast channel.

On the contrary, when there is a lot of available fee information, it is determined that the tuned broadcast channel can be copied.

If there is little charge information available in the step 206, it is impossible to copy the tuned broadcast channel, and thus the copy mode operation is terminated. If the opposite is the case, the process proceeds to step 207.

In step 207, the copy selection mode inputted through the command applier 201 is provided to the microprocessor 120.

Therefore, in the microprocessor 120, when the copy selection signal is input in the A / V mode (video / audio), packet data provided from the MPEG2 system decoder 106 (Figs. 3 (c) and (d)). That is, the multiplexer 122 is switched from a to b so that both video and audio packet data of the broadcast program of the satellite broadcast can be transmitted to the recording medium 124.

In addition, when the selection signal is in the V mode (video), the packet data (Fig. 3 (c)) provided from the MPEG2 system decoder 106, that is, the video packet data of the broadcast program of the satellite broadcast is recorded on the recording medium 124. The multiplexer 122 is switched from a to d so that it can be transmitted to.

When the selection signal is A mode (audio), the packet data (Fig. 3 (d)) provided from the MPEG2 system demux 106, that is, the video packet data of the broadcast program of the satellite broadcasting is recorded on the recording medium 124. The multiplexer 122 is switched from a to c so that it can be transmitted.

Accordingly, the packet data provided from the MPEG2 system demux 106 is transferred to the recording medium 124 through the switched multiplexer 122 to make a copy.

As such, the video and audio signals are packetized as digital signals by the MPEG2 system demux 106 and then stored in the recording medium 124 according to the copy selection signal selected by the user. This data can be used more efficiently in digital devices.

In addition, this invention can be modified in the range which does not limit the above-mentioned embodiment, and does not deviate from the technical summary of this application.

As described above, the present invention has an effect that the video and audio data can be applied more efficiently in a personal computer or other digital device by selectively transmitting (recording) the broadcast signal received as a digital signal to a storage medium. .

Claims (3)

MPEG2 system demux that receives satellite broadcasting program and converts channel decoding and descrambled broadcasting channel into stream packetized data, and restores the packetized data to video and audio, and uses information related to the restoration. A DBS receiving apparatus having a modem, a smart card, etc. for transmitting and receiving a signal, comprising: a command authorizing unit for applying a broadcast channel tuning command and a copy mode (A / V, A, V) selection command according to the broadcasting channel tuning command; 118; Responsive to the broadcast channel selection command and the copy mode (A / V, A, V) selection command of the command granting unit 118, retrieves copy information in the digital packet stream data of the tuned broadcast channel. A microprocessor (120) for outputting a switching signal corresponding to a copy mode provided from the command applying unit on the basis of the retrieved copy information; A multiplexer 122 for switching the stream packetized digital data provided from the MPEG2 system demux 106 and transferred to the recording medium 124 based on the copy mode switching signal of the microprocessor 120. Copy selector of the DBS receiver, characterized in that it comprises a. MPEG2 system demux that receives satellite broadcasting program and converts channel decoding and descrambled broadcasting channel into stream packetized data, restores the packetized data to video and audio, and uses information related to the restoration. In the DBS receiving method having a modem and a smart card for transmitting and receiving a signal, a broadcasting channel tuning command and a copy mode (A / V, A, V) selection command according to the broadcasting channel tuning command are inputted, A first step (201 to 203) of acquiring stream packet unit digital data of a broadcast channel tuned according to a broadcast channel and a tuning command, and retrieving free and paid copy information from the obtained data; A second step (204 to 205) of determining whether the copy information is paid copy information if it is determined that the search result is not free copy information; If it is determined in the second step as paid copy information, the possibility of copying is determined based on the rate information for this broadcast channel pro, and if this copy is possible, the predetermined predetermined value for the tuned broadcast channel is determined. And a third step (206 to 207) of outputting a switching signal corresponding to the copy mode. The copy of a DBS receiver according to claim 2, wherein if it is determined that the free copy information is a result of the search in the first step, a switching signal corresponding to the copy mode provided from the command applying unit is output. How to choose.