KR20000031426A - Method for researching public opinion in satellite broadcasting system - Google Patents

Abstract

PURPOSE: A method for researching a public opinion in a satellite broadcasting system is provided to research the public opinion without separated additional expenses. CONSTITUTION: A researching method of public opinion in a satellite broadcasting system transmits a message for requesting a research of public opinion through a satellite by loading in an RCM(Receiver Command Message) packet among an RSMS(Resource and Subscriber Management System) for performing the research of public opinion in the RSMS(3). The Rcm packet is transmitted, and caption data for displaying is transmitted by containing in an elementary stream or an RSMS message so a user as to select a content of research on a TV screen at the same time. A receiver(4) decodes the received Rcm packet. The receiver(4) transmits an inputted user's opinion about the research of public opinion to the RSMS(3) when a checking operation is finished after receiving a message of research and inputting in a smart card(6) for the checking operation. And the receiver(4) disconnects a contact with the RSMS(3), and transmits a checking signal of disconnection for checking the disconnection to the RSMS(3). The RSMS(3) performs the research of public opinion by synthesizing each user's opinion received from receivers.

Description

Survey Method of Satellite Broadcasting System

The present invention relates to a satellite broadcasting system, and more particularly, to a method for polling a satellite broadcasting system.

Until now, satellite broadcasting systems have only been providing general A / V services, but in the coming multimedia era, the success or failure of the media will depend on how diverse and high quality services can be provided to consumers. Depends As shown in FIG. 1, the satellite broadcasting system includes a program and data signal source 1 that generates broadcast related signals through various signal processing, and a broadcast related signal generated by the program and data signal source 1, as shown in FIG. A transmission earth station (2), a resource and subscriber management system (RSMS) (3) for transmitting the data to the satellite via a satellite antenna, and receive and demodulate the channel signal transmitted by the satellite. Receiver for converting into a viewable signal (4), Smart card (6) that stores personal information and viewing details to receive limited broadcasts, such as paid programs, modem for communicating with the RSMS (3) (7), it consists of a Public Switched Data Network (PSDN) or a Public Switched Telephone Network (PSTN), which is a communication network between the modem 7 and the RSMS 3.

In this case, a signal multiplexed with video, audio, and additional information to be transmitted in a satellite broadcasting system is called a transport stream. Detailed information multiplexed by the transport stream is largely shown in FIG. 2. It is divided into elementary stream and resource & subscriber management system (RSMS) stream. The elementary stream includes video information, audio information, and data added from digital broadcast. The primary purpose for broadcast is the basic stream. The RSMS stream is side information.

In this case, the RSMS stream is divided into a service information (SI) and an RSMS message, of which SI is program specific information (PSI) and program guide information (PMM), which are program designation information for enabling the receiver to demultiplex TS. Guide Message (RSM) is divided into RSMS messages. Information is transmitted only when the CA is used. The RSMS message is divided into an Entitlement Control Message (ECM), an Entitlement Management Message (EMM), and a Receiver Command Message (RCM).

In addition, programs that are serviced through satellite broadcasting systems are required to use the smart card and pay the corresponding fee to pay for free channels such as KBS and MBC. -Per-View), PPC (Pay-Per-Channel), etc., the smart card (6) stores the history as much as watched and the contents of the service to charge the service fee for a certain period through a modem The center is sent to the RSMS 3.

Conventionally, when a poll is needed among broadcasting programs, for example, in the case of a candidate candidate for presidential election, each broadcaster is commissioned by a specialized agency dedicated to polling, and the specialized agency surveys public opinion by telephone. A poll was conducted to inform the broadcaster.

Also, in case of discussion, entertainment, sports broadcasting, etc., in case of asking viewer's opinion or requesting viewer's participation, viewer should make a separate call or use fax.

The public opinion poll of the TV broadcast program according to the prior art has a problem in that the participant has to present his / her opinion by using a communication means such as a separate telephone or a fax, thereby causing inconvenience to the user and paying a separate cost.

Accordingly, an object of the present invention is to provide a method for public opinion polling of a satellite broadcasting system, which is designed to solve the above-mentioned conventional problems, so that polling can be easily performed at no additional cost.

1 is a layout diagram schematically showing the configuration of a satellite broadcasting system;

2 is a diagram showing the configuration of a transport stream;

3 is a view for explaining a public opinion survey method of the satellite broadcasting system according to the present invention;

The present invention comprises the steps of transmitting via the transmitter and the satellite the character data for displaying the RCM (Receiver Command Message) and the RCM PID and the survey contents including the poll message by assigning a reservation code in the RSMS, Receiving text data from the receiver, displaying the corresponding survey content on the screen, receiving RCM and RCM PID, and accessing the corresponding RSMS through the communication network with the RSMS access number of the RCM application demuxed and decoded according to the RCM PID. And, when a poll command is transmitted from the RSMS, the opinion input by the viewer according to the content of the poll displayed on the screen is transmitted to the RSMS, and the RSMS is characterized in that it comprises the step of surveying the opinion according to the opinion of the viewer.

Hereinafter, a public opinion survey method of a satellite broadcasting system according to the present invention will be described with reference to the accompanying drawings.

3 is a view for explaining a public opinion survey method of the satellite broadcasting system according to the present invention.

In the polling method of the satellite broadcasting system according to the present invention, in order to perform a poll in the RSMS (3), the poll request message is transmitted to the RCM packet in the RSMS message through the satellite.

At this time, the caption data for displaying the poll content so that the user can view and select the poll on the TV screen is transmitted in the base stream or RSMS message.

The receiver 4 then demuxes and decodes the received RCM packet.

At this time, the poll request message included in the RCM packet and the detailed operations of the demuxing / decoding are as follows.

Message description Fcode (Hex) Usage Upload Request 0 × 0301 Service message 0 × 0302 A poll 0 × 03XX (XX: Reserved RCM code)

First, Table 1 is a RCM (Receiver Command Message) packet defined in the RSMS (3) message. The present invention assigns a reserved code among several Fcode (Function codes) to add a poll message.

construction Number of bits value CA_descriptor () { descriptor_tag 8 0 × 09 descriptor_length 8 6 CA_system_ID 16 RSMS Center ID reserved 3 111 EMM_PID 13 × reserved 3 111 RCM_PID 13 × }

In order to detect necessary data from the RCM packet, a PID (Packet ID) is required, so that the RCM PID is included in the CAT Descriptor of the CAT (Conditional Access Table) in PSI (Program Specific Information) information as shown in Table 2 below. Transfer to (4).

shape size Explanation Point byte One 0 × 00 Address 4 Satellite Broadcasting Service Address Fcode 2 RCM command (0 × 03XX) Application Message 0-173 message FCS 4 Frame Check Sequence Stuffing 173 Stuffing byte

Therefore, the receiver 4 demuxes the RCM packet with the RCM PID transmitted as described above, and as a result, the demuxed RCM packet has a format as shown in Table 3 below.

At this time, the address of the satellite broadcasting service composed of 4 bytes means the address of the area to be investigated, and public opinion of a specific area can be investigated.

MSB (byte A3) byte A2 byte A1 byte A0 Explanation 0000 0000 X X X Broadcast address 0000 0001 X X X Assigned Address 0000 0010 X X X Assigned Address 0000 0011 X X X Assigned Address 0000 0100 X Service group address 0000 0101 X X 64K Group Address 0000 0110 X 256 group addresses 0000 0111 An individual address

At this time, the receiver may also investigate public opinion by region, age, or propensity according to the smart card address shown in Table 4.

Of the A2, A1, and A0 bytes, the byte marked 'X' is ignored because it is a byte not involved in addressing.

Subsequently, the receiver 4 decodes an application message consisting of 0 to 173 bytes of the RCM packets of Table 3 received for each address of the smart card according to a function code, and the decoding result application message is a table. It has the same form as 5.

Off set Size (byte) Justice Explanation 0 One CTRL Flag byte for message avoidance / continuous message identification One One N Number of poll RSMS centers in the message 2 2 RSMS ID Opinion Poll RSMS Center ID 4 16 RSMS Number PSTN number for modem for public opinion poll 20 16 RSMS Number PSDN number for modem for public opinion poll … … … Stuffing byte (FF) 172 One EOM End message

Therefore, the receiver 4 catches the poll message according to the decoded application message, dials the PSDN / PSTN telephone number included in the application message, and connects to the poll RSMS 3 via the PSDN / PSTN.

The connection request signal is transmitted to the RSMS 3 so that data communication with the RSMS 3 is possible.

The RSMS 3 then responds to the connection request signal from the receiver 4 and sends a command to the receiver 4 to send a poll message, ie the poll content.

On the other hand, the monitor or TV screen of the receiver (4) is displayed on the broadcast program and the corresponding survey content, the viewer checks the poll contents through the monitor or TV screen and the opinions of the remote control or the key panel of the TV body, etc. To enter.

Therefore, the receiver 4 receives the poll message, inputs it to the smart card 6 for confirmation, and transmits the opinion about the poll entered by the viewer to the RSMS 3 when the confirmation is completed.

Subsequently, the RSMS 3 requests a short circuit to the receiver 4 when reception of opinions related to the polls is completed.

The receiver 4 short-circuits the connection with the RSMS 3 and then transmits a short-circuit confirmation signal to the RSMS 3 to confirm the short circuit.

The RSMS 3 then receives a short confirmation signal to short the connection with the receiver 4.

Accordingly, the RSMS 3 performs a poll by synthesizing each viewer's opinion received from the receivers.

The public opinion polling method of the satellite broadcasting system according to the present invention surveys public opinion using the RCM packet of the RSMS without changing the communication standard of the satellite currently being serviced, thus reducing the cost of the public opinion survey and at the same time, making the survey quick and easy. There is an effect that can be performed.

Claims (2)

In the satellite broadcasting system comprising a transmitter, a resource and subscriber management system (RSMS), a receiver, Allocating a reservation code in the RSMS to transmit a receiver command message (RCM) including an opinion message, RCM PID, and text data for displaying the contents of the opinion on the screen via a transmitter and a satellite; The receiver receives the text data and displays the corresponding survey content on the screen, receives the RCM and RCM PIDs, and sends the RSMS access number of the application message of the demuxed and decoded RCM according to the RCM PID to the corresponding RSMS through the communication network. Connecting; And when the opinion command is transmitted from the RSMS, sending the opinion input by the viewer according to the contents of the opinion displayed on the screen to the RSMS, and the RSMS conducts a survey according to the opinions of the viewers. Survey method of satellite broadcasting system. The method of claim 1, The application message is a flag byte for message avoidance / continuous message identification consisting of 1 byte, the number of polling RSMS centers consisting of 1 byte, the RSMS center ID consisting of 2 bytes, and the PSTN number for polling modem consisting of 16 bytes. And a polling modem PSDN number consisting of 16 bytes, a stuffing byte, and a message ending byte of 1 byte.