KR20050105350A - The real time epg client/server system and method - Google Patents

Abstract

The present invention relates to a client / server system and a control method to which a real time electronic program guide (RT-EPG) is applied.

Program data handling part (10) and RT-EPG server system (3) of client system (1) including TV, PVR, DVD, VCR product line with program receiving / output function or recording function to provide RT-EPG service. Program information request message M_1 including BSI / PTI / PCI information, program information response message M_2 including PNI / PDI / PST / PET information, and BSI using the Program Information Search Part 30 By sending a program information change message (M_3) that optionally includes / PNI / OCI / ODI / OST / OET / RCI / RDI / RST / RET / RI information, regardless of the type of broadcaster for which the user is receiving services It provides the effect of operating a unified RT-EPG server system (3) that can provide an integrated real-time electronic program guide (RT-EPG) service.

Description

Client / server system and control method applying real-time electronic program guide. {The Real Time EPG Client / Server System and Method}

The present invention relates to a client / server system and a control method to which a real time electronic program guide (RT-EPG) is applied.

Hereinafter, an electronic program guide (EPG) according to the prior art will be described. The client system receives the electronic program programming information from the EPG server, and if the user executes the electronic program guide function, the client system screen outputs the program schedule based on the received information, and when the user selects a specific program from the screen outputted program schedule, Change channel to the channel. In addition, the program screen and the reduced screen of the channel where the icon on the table is located at the same time outputs the screen, if the user selects a channel to view the reduced screen to the enlarged screen, if the user changes the channel corresponding to the changed channel Display program information for a certain time.

However, in the EPG technology according to the prior art, there are various types of broadcasters, including local wired / cable broadcasters, broadcasters providing satellite broadcasting services, and airborne broadcasters, and the date, channel, and time broadcast even though the same program is broadcast for the various broadcasters. Since these different cases exist, it is impossible to provide an integrated and unified EPG service to a client system using a single EPG server, so that not only a separate EPG server is operated for each broadcasting company, but also a user can use the EPG function. In use, there is a problem in that it is inconvenient to use a part of the broadcast screen due to a broadcast screen that is enlarged / reduced and a program information guide subtitle that disappears after being output for a predetermined time every time the channel is changed in the channel search process.

Accordingly, the present invention is to solve the above problems, regardless of the type of broadcaster that the user is using, the "program" provided in the remote control to display the name of the program currently being viewed in the process of viewing the program Only when you input the "Check information" key or when you press the "Set reserved program" key on the remote control to register the program you are currently watching as a reserved program, the program information request message is sent to the RT-EPG server. The program information is registered using the program information response message as a screen output or a reserved program, and when a program whose organizational information is changed in the RT-EPG server is searched, the program information change message is transmitted to the client system. Received program If the reserved program information corresponding to the program information before the change of the information change message exists in the memory of the client system, the reserved program information existing in the memory is updated with the program information after the change of the received program information change message. The purpose of the present invention is to provide a client / server system and a control method to which an integrated and unified real-time Real-Time Electronic Program Guide function is applied to solve the problems and inconveniences.

1 is a program data handling part 10 embedded in a client system 1 for providing a real time electronic program guide service according to the present invention, a program information search part 30 embedded in a server system 3, And a block diagram showing an interworking structure between a client and a server system.

FIG. 2 is a diagram illustrating a remote controller 11 for using the RT-EPG service according to the present invention, wherein a reserved program setting key 11a is input to register a program being watched as a reserved program and a user is watching. It characterized in that it comprises a program information confirmation key (11b) input to confirm the program information.

Client system (1) including a TV, PVR, DVD, VCR family applied to the program receiving / output function or recording function for providing the RT-EPG service according to the present invention for achieving the above object, and RT- The EPG server system 3 is characterized in that, in the client system 1, a video signal is connected to a program data handling part 10 that collectively controls the RT-EPG function of the client system 1 and the program data handling part. Memory 17 that stores variable information / reserved program registration information for RT-EPG function control connected to the Display Part 16 for outputting the program data handling part and RT-EPG connected to the Program Data Handling Part. In the server system (3) for providing an RT-EPG service, characterized in that it comprises a Signaling Control Part (15) for transmitting information for providing a function, RT-EPG of the server system (3) Function And a Signaling Control Part (35) which is connected to the Program Information Search Part (30) for overall control and the Program Information Search Part for transmitting information for providing the RT-EPG function. The signaling control part 15 of (1) and the signaling control part 35 of the server system 3 include broadcaster unique code information (BSI), current time information (PTI), and current viewing for providing RT-EPG service. Program information request message (M_1) including channel information (PCI), program name information (PNI), program day information (PDI), program start time information (PST), program information including program end time information (PET) Response message (M_2), broadcaster unique code information (BSI), program name information (PNI), channel information before change (OCI), weekday information before change (ODI), start time information before change (OST), end time before change Information (OET), channel information after change (RCI) To change the program information change message (M_3), which optionally includes the day of the week information after change (RDI), start time information after change (RST), end time information after change (RET), and deletion information (RI). It is characterized by forming a network using a wireless channel (2) to interwork.

The Program Data Handling Part 10, which collectively controls the RT-EPG function of the client system 1, is connected to the Program Data Handling Part 10 by wire / wirelessly and applied to the keypad or remote controller 11 of the client system. A reserved program setting key 11a / program information confirmation key 11b, a Display Control Part 10d connected to the Program Data Handling Part to control subtitle information supporting a Graphic User Interface related to the RT-EPG function, and Detecting part (10e) connected to the Program Data Handling Part to detect the overall operating state of the client system including whether channel information / function keys (11a, 11b) being viewed by the client system, and the Program Data Handling Part; Another feature is that it is composed of a Time Control Part (10t) connected to calculate the time information.

The Program Data Handling Part 10 of the client system 1 that provides the RT-EPG Service to the user includes a reserved program setting key 11a, a program information confirmation key 11b, a Display Control Part 10d, and a Detecting Part. 10e and the broadcaster unique code information used by the user when the broadcaster unique code information (BSI) used by the user is not set in the initial setting item based on the information inputted and outputted from the time control part (10t). (B) outputting a notice requesting a BSI setting; outputting a notice requesting the current time information (PTI) setting if the PTI is not set in the initial setting item; and Enters the reserved program setting key 11a to register the program currently being viewed as a reserved program, or checks the program information key (1) In the case of inputting 1b), the server system generates a program information request message M_1 including the retrieved information by retrieving broadcaster unique code information BSI, current time information PTI, and current viewing channel information PCH. (3) transmitting the program information and the program day time information (PDI, PST, PET) when the program information response message (M_2) is received from the server system. If the program information response message (M_2) is received by inputting the reserved program setting key (11a), the client system generates the reserved program information including the program name information (PNI) and the program day time information (PDI, PST, PET). Storing in the memory 17 of (1), and when the program information change message M_3 is received from the server system, the pre-change program information (BSI, PNI, OCI, ODI, OST included in the received message). If reserved program information corresponding to the " OET " exists in the memory 17, the memory 17 can be stored using the changed program information (RCI, RDI, RST, RET) or deletion information (RI) included in the received message. And updating or deleting the reserved program information existing on the back panel. The variable information constituting the program information request message (M_1) includes a broadcaster unique code BSI (Broadcasting Station Information) information set by a user, present time PTI (Present Time Information) information, and present viewing channel PCI (Present Channel Information) information. The variable information constituting the program information response message M_2 includes program name PNI information, program day PDI information, program start time PST information, and program end time. Variable information constituting time program end time (PET) information and constituting the program information change message (M_3) includes broadcaster unique code BSI (Broadcasting Station Information) information and channel OCI (Original Channel Information) information before change and before change. ODI (Original Day Information) information and the program start time before the change OST (Original Start Time) information and the program end before the change OET (Original End Time) information and after change Channel RCI (Recent Channel Information) and day after change RDI (Recent Day Information) information and program start time after change RST (Recent Start Time) information and program end time after change RET ( And optionally include Recent End Time (RI) information and Delete RI (Remove Indicator) information. PTI information constituting the program information request message M_1, PST / PET information constituting the program information response message M_2, and OST / OET / RST / RET constituting the program information change message M_3. Information and the ST / ET information constituting the reserved program variable information on the memory 17 can be selectively configured to include year, month, day, day of the week, am / pm, hour, minute, and second information. do.

The display control part 10d of the program data handling part 10 of the client system 1 includes a broadcaster information setting guide, a current time information setting guide, program information, and a program as shown in FIGS. 7 to 8. And controlling information related to a graphical user interface (GUI) for outputting information for registering a reservation program including information.

Detecting part (10e) of the Program Data Handling Part (10) of the client system (1) is whether the user inputs the channel information and the reserved program setting key (11a) and whether the program information confirmation key (11b) is input It detects the overall operating state of the client system, including, and transmits to the Program Data Handling Part (10).

The time control part 10t of the program data handling part 10 of the client system 1 is for calculating year, month, day, day of the week, and time information, and in particular, a front switch or a remote controller of the client system 1. Calculating the current time information at the time when the user inputs the reserved program setting key 11a / program information confirmation key 11b applied to (11), and receives a program information change message M_3 from the server system 3; Performing comparison operation of the time information for searching whether the reserved program information corresponding to the program time information (ODI, OST, OET) before the change included in the message exists in the memory 17 of the client system 1. Characterized in that it comprises a step.

The memory 17 of the client system 1 stores the broadcasting station unique code BSI (Broadcasting Station Information) information and the reserved program setting information set by the user. The reserved program setting information includes program name PN (Program Name) information, program day PD (Program Day) information, channel CH (Channel) information, start time ST (Start Time) information, and end time ET (End Time) information. Characterized in that the configuration.

The RT-EPG function of the server system 3 is collectively controlled and program information corresponding to the information included in the received program information request message M_1 is generated to generate and transmit a program information response message M_2. The program information search part 30 for generating and transmitting a program information change message M_3 when a change of program organization information is detected includes a time control part 30t connected to the program information search part to calculate time information. It is characterized by another configuration.

The Program Information Search Part 30, which collectively controls the RT-EPG function of the server system and stores program organization information for each broadcaster, is based on information inputted to and output from the Time Control Part 30t and the Signaling Control Part 35. Receiving a program information request message (M_1) from (1) corresponding program information that satisfies both the broadcaster unique code information (BSI), the current time information (PTI) and the current viewing channel information (PCI) included in the received message The program information response message (M_2) including the program name information (PNI) and the program time information (PDI, PST, PET) of the searched program is searched from the program programming information for each broadcasting company, and transmitted to the client system (1). And the unique code of the broadcaster whose program programming information is changed when the program programming information is changed due to the broadcaster's circumstances. BSI, changed program name information (PNI), changed program information (OCI, ODI, OST, OET), changed program information (RCI, RDI, RST, RET) and changed program are closed. Constructing a program information change message (M_3) optionally including the set deletion information (RI) and transmitting the program information change message (M_3) to the client system (1); And transmitting to the client system 1.

The time control part 30t of the program information search part 30 of the server system 3 is for calculating year, month, day, day of the week, and time information, and in particular, a program information request message ( M_1), and comparing the time value for searching for program information corresponding to the current time information (PTI) included in the received message.

Other objects, features and advantages of the present invention will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of a client / server system and a control method to which a real-time electronic program guide (RT-EPG) according to the present invention will be described will be described with reference to the accompanying drawings.

FIG. 3 is a diagram illustrating an example of a message (M_1, M_2) flow generated in a program information request / response process between client / server systems among RT-EPG functions according to the present invention. 3) the program information request message M_1 is transmitted, and in response to the message, the server system 3 transmits the program information response message M_2 to the client system 1. The program information request message M_1 includes broadcaster unique code information BSI uniquely assigned to each broadcaster to distinguish broadcasters, and a reserved program setting key 11a or a program information confirmation key applied to a client system 1 by a user. Current time information (PTI) at the time of inputting 11b and current viewing channel information (PCI) at the time when the user inputs the reserved program setting key 11a or program information confirmation key 11b applied to the client system 1. The program information response message (M_2) is broadcaster unique code information (BSI), current time information (PTI) and the current viewing channel information included in the program information request message (M_1) Program name information (PNI), program day information (PDI), and program time of a specific program found in the Program Information Search Part (30) of the server system It is characterized in that it comprises the operation time information (PST) and the program end time information (PET).

4 is a flowchart illustrating an example of a control process of a client / server system for processing the program information request / response messages M_1 and M_2 shown in FIG. 3 among the RT-EPG functions according to the present invention. The details of the case where the reserved program setting key 11a / program information confirmation key 11b applied to the client system 1 are input are described below.

In the Program Data Handling Part 10 of the client system 1,

(a) When the user turns on the power of the client system 1, the client system initializes the RPI (Record Program Indicator) variable value, which is variable information for determining whether the reserved program setting key 11a is input, to 0. Step S1;

(b) checking, by the user, an initial setting item for the RT-EPG service, and checking whether broadcaster unique code information (BSI) is set (S2);

(c) In step (b), if the BSI is not set, the user outputs a list of broadcasters including a local cable broadcaster, a satellite broadcaster, an airborne broadcaster, and the like. Requesting to select a broadcaster that is being used from the outputted broadcaster list screen, and if the user selects a specific broadcaster, setting unique broadcast code for each broadcaster assigned to the selected broadcaster as a BSI value (S3);

(d) checking whether the current time information (PTI) of the client system 1, which is an initial setting item for the RT-EPG service, is set (S4);

(e) outputting a screen requesting the user to set the current time information when the current time information (PTI) is not set as a result of the check in step (d) (S5);

(f) When the user inputs (S6) a reserved program setting key 11a applied to the client system 1 to register the program he is currently watching as a reserved program, it is determined whether the reserved program setting key 11a is input. Setting an RPI (Record Program Indicator) variable value as variable information to 1 (S8);

(g) inputting a program information confirmation key 11b applied to the client system 1 to confirm the program name information of the program currently being viewed by the user (S7);

(h) When the user inputs the reserved program setting key 11a or the program information confirmation key 11b in step (f) or step (g), broadcaster specific code information (BSI) stored in the memory 17. And current time information PTI detected at the time control part 10t at the time when the keys 11a and 11b are input and current detected at the detecting part 10e at the time when the keys 11a and 11b are input. Retrieving viewing channel information (PCI) (S9);

(i) constructing a program information request message M_1 including BSI, PTI, and PCI information retrieved in step (h), and transmitting the same to the server system 3 using the signaling control part 15 (S10). )Wow;

In the Program Information Search Part 30 of the server system 3,

(j) Upon receiving the program information request message M_1 from the signaling control part 35 connected to the fourth Program Information Search Part (S11), the broadcaster unique code information (BSI) and the current time included in the received message are received. Search for program name information (PNI), program day and week information (PDI), program start time information (PST), and program end time information (PET) of a specific program that satisfies both information (PTI) and current viewing channel information (PCI) Step S12;

(k) constructing a program information response message (M_2) including the PNI, PDI, PST, and PET information retrieved in step (j), and transmitting the same to the client system 1 using the signaling control part 35; (S13);

In the Program Data Handling Part 10 of the client system 1,

(l) receiving the program information response message (M_2) from a signaling control part (15) connected to the program data handling part (S14);

(m) In the above process, when the user inputs the program information confirmation key 11b and the RPI (Record Program Indicator) value, which is variable information on the memory 17 of the client system 1, is set to 0, the (l) Searching for PNI (Program Name Information) information included in the message M_2 received in the step, and outputting the PCI information and PNI information to the Display Part 16 for a predetermined time using the Display Control Part 10d. (S15);

(n) In the above process, when the user inputs the reserved program setting key 11a, when the value of the RPI (Record Program Indicator), which is variable information on the memory 17 of the client system 1, is set to 1, (l) The PNI (Program Name Information) information, PDI (Program Day Information) information, PST (Program Start Time) information, and PET (Program End Time) information included in the message M_2 received in the step are searched to register a reservation program. If the user inputs a confirmation key for outputting a notice for checking and outputting the reserved program information and registering the reserved program information as a reserved program, registering and storing as a reserved program on the memory 17 of the client system 1 (S16). )Wow;

(o) A client / server system and a control method to which a real-time electronic program guide (RT-EPG) is applied, including setting and initializing RPI (Record Program Indicator) information to 0 (S17).

5 is a diagram illustrating an example of a message (M_3) flow generated in a process of changing program information transmitted between client / server systems among RT-EPG functions according to the present invention. When the changed program information on the information is retrieved, the program information change message M_3 is transmitted to the client system 1, and the client system 1 that has received the message M_3 changes the information contained in the message M_3. If the reserved program information corresponding to the previous program information exists on the memory 17 of the client system 1, the reserved program information is updated to the latest information using the changed program information included in the message M_3. The program information change message (M_3) includes broadcaster unique code information (BSI), program name information (PNI), pre-change channel information (OCI), pre-change day information (ODI), and Pre-change program start time information (OST), pre-change program end time information (OET), post-change channel information (RCI), post-change day information (RDI), post-change program start time information (RST) It is characterized in that it is configured to optionally include the program termination time information (RET) after the change, and the deletion information (RI) that means to delete the registered reservation program due to the program termination.

FIG. 6 is a flowchart showing an example of a control process of a client / server system for processing a program information change message shown in FIG. 5 among RT-EPG functions according to the present invention. FIG. Details of the case where the program information is retrieved are described below.

In the Program Information Search Part 30 of the server system 3,

(p) When program information of a specific program is changed due to broadcaster circumstances or program termination, and program information whose program information is changed is detected in the program information search part 30 (S21), broadcaster unique code information (BSI) of the changed program is detected. ), Program name information (PNI), pre-change channel information (OCI), pre-change day information (ODI), pre-change program start time information (OST), pre-change program end time information (OET) The channel information (RCI) after the change, the day information (RDI) after the change, the program start time information (RST) after the change and the program end time information (RET) after the change are selectively set, and the changed program is terminated. Setting delete information RI in step S22;

(q) constructing a program information change message (M_3) including the information set in step (p) and transmitting it to the client system (1) using the signaling control part (35) (S23);

In the Program Data Handling Part 10 of the client system 1,

(r) Upon receiving the program information change message M_3 from the signaling control part 15 connected to the program data handling part at step S24, the program information before the change included in the received message (BSI, PNI, OCI, Retrieving whether reserved program information corresponding to ODI, OST, and OET exists on the memory 17 of the client system 1 (S25);

(s) If the corresponding reserved program information exists in the memory 17 of the search result client system 1 in step (r) (S26), the corresponding reserved program registration information is sent to the program information change message (M_3). Updating the post-change information included in the step S27;

(t) In the step (r), if the corresponding reserved program information exists in the memory 17 of the search result client system 1 (S26) and RI information is set in the program information change message M_3, the client And deleting the corresponding reserved program information existing on the memory 17 of the system 1 (S28).

7 is a diagram illustrating an example of an initial setting screen including a broadcaster unique code information setting guide and a current time setting guide for using the RT-EPG function according to the present invention.

FIG. 8 is a diagram illustrating an example of program information displayed on a screen when a user inputs a program information confirmation key 11b applied to the client system 1 among the RT-EPG functions according to the present invention.

As described above, in the client system, when the user inputs the reserved program setting key 11a applied to the remote controller 11 of the client system 1 in order to register the program that the user is currently watching as a reserved program. Alternatively, only when the user inputs the program information confirmation key 11b applied to the remote controller 11 of the client system 1 to confirm the program information currently being viewed, the client system is the RT-EPG server system 3. By using the program information response message received by transmitting the program information request message including the broadcaster unique code information set in (1), the current time information, and the current viewing channel information, the corresponding program information is output to the screen output or reserved program. In the function of registering and in the RT-EPG server system 3, on the program organization information for each broadcasting company, A program including broadcaster unique code information, program name information, pre-change program information, and post-change program information of the program in which the change has occurred to the client system 1 only when the program information in which the change occurs is retrieved. The reserved program information corresponding to the program information before the change included in the program information change message is stored on the memory of the client system 1 that receives the program information change message by transmitting the information change message at a predetermined time interval for a predetermined period. If registered, based on the function of updating the reserved program information registered in the memory with the post-change program information included in the program information change message, regardless of the type of broadcaster for which the user is provided with a reception service. Integrated real-time electronic program It provides Id (RT-EPG) difference in the RT-EPG server system 3 unification that can provide a service to run.

1 is a block diagram illustrating a server / client system to which an RT-EPG service according to the present invention is applied.

2 is a view showing a remote control for applying the RT-EPG service according to the present invention.

3 is a diagram illustrating a message flow transmitted between a server / client system in a program information request process among RT-EPG functions according to the present invention.

4 is a flowchart illustrating a program information request process among RT-EPG functions according to the present invention.

5 is a diagram illustrating a message flow transmitted between a server and a client system in a process of changing program information among RT-EPG functions according to the present invention.

6 is a flowchart illustrating a process of changing program information among RT-EPG functions according to the present invention.

7 is a view showing an example of an initial setting screen for using the RT-EPG function according to the present invention.

8 is a view showing an example of program information that is output on the screen when requesting the program information of the RT-EPG function according to the present invention.

* Description of Major Symbols in Drawings *

* 1: Client System

10: Program Data Handling Part

10d: Display Control Part

10e: Detecting Part

10t: Time Control Part

11: Remote Control Transmitter

11a: reservation program setting key

11b: Program information confirmation key

15: Signaling Control Part

16: Display Part

17: Memory

* 2: Wire or Wireless Connection & Channel (Signaling Connection)

* 3: Server System

30: Program Information Search Part

30t: Time Control Part

35: Signaling Control Part

Claims (7)

In video equipment including TV, digital / satellite broadcasting receiver, VCR, PVR, DVD, product line with program viewing or recording function, Program Data Handling Part (10) that controls the RT-EPG function collectively, and unique code of broadcasting company Memory 17 for storing variable information for RT-EPG function control including information, a remote controller 11 to which a reserved program check key 11a and a program information check key 11b are applied, and signaling for information transmission. A client 1 composed of a control part 15; A server 3 comprising a Program Information Search Part 30 for overall control of the RT-EPG function and a Signaling Control Part 35 for transmitting information; And, Applying a real-time electronic program guide comprising a wired / wireless channel (2) for transmitting a program information request message, a program information response message, and a program information change message between the signaling control parts (15.35) of the client / server. Client / Server System. In the client system (1) and server system (3) composed of a TV, a digital / satellite broadcast receiver, a VCR, a PVR, a DVD, a family of products including a program or a program viewing or recording function, Using the current time information (PTI) and the current viewing channel information (PCI) at the time when the broadcasting company unique code information (BSI) and the function keys 11a and 11b are input, the information about a specific program is derived. Broadcaster's unique code information (BSI), program name information (PNI), pre-change channel information (OCI), pre-change day information (ODI), pre-change program start time information (OST) and pre-change program end time information (OET) And change channel information (RCI), change day of the week information (RDI), change program start time information (RST), change program end time information (RET), and delete information (RI) which is set when the program is closed. A client / server system to which a real-time electronic program guide is applied, characterized by updating or deleting the reserved program information registered on the memory (17) of the client system (1) using the variable. In the client system (1) consisting of a video device including a TV, a digital / satellite broadcast receiver, a VCR, a PVR, a DVD, a product line with a program viewing or recording function, If the broadcaster unique code information (BSI), which is a user initial setting item for using the RT-EPG service, is not set, the screen output information requesting the user to set the broadcaster unique code information (BSI), When the current time information (PTI), which is a user initial setting item for using the RT-EPG service, is not set, a screen for outputting information requesting the user to set the current time information (PTI) is displayed. Client system and control method applying program guide. In the client system (1) consisting of a video device including a TV, a digital / satellite broadcast receiver, a VCR, a PVR, a DVD, a product line with a program viewing or recording function, When the reserved program setting key 11a or the program information confirmation key 11b applied to the remote controller 11 of the client system 1 is inputted, Program information request including broadcast station unique code information (BSI) set or retrieved from client system 1 and current time information (PTI) and current viewing channel information (PCI) at the time when the function keys 11a and 11b are inputted A client / server system and control method applying a real-time electronic program guide, comprising: constructing a message (M_1) and transmitting it to a server system (3) using a signaling control part (15). Satisfies both broadcaster unique code information (BSI), current time information (PTI), and current viewing channel information (PCI) included in the program information request message M_1 received by the signaling control part 35 of the server system 3. Program name information (PNI), program day information (PDI), program start time information (PST), and program end time information (PET) A program information response message (M_2) including the retrieved PNI, PDI, PST, and PET information is constructed and transmitted to the client system 1 using the signaling control part 35. Applied client / server system and control method. In the client system (1) consisting of a video device including a TV, a digital / satellite broadcast receiver, a VCR, a PVR, a DVD, a product line with a program viewing or recording function, Program Name Information (PNI) or Program Day Information (PDI) information or Program Start Time (PST) information or PET included in the program information response message M_2 received from the signaling control part 15 of the client system 1 And a method of controlling a client / server system using a real-time electronic program guide, wherein the program information is registered as a screen output or a reserved program for a predetermined time using program end time information. In the client system (1) and server system (3) composed of a TV, a digital / satellite broadcast receiver, a VCR, a PVR, a DVD, a family of products including a program or a program viewing or recording function, The server system (3) that detects the change in the programming information of a specific program on the program programming information for each broadcaster is the broadcaster's unique code information (BSI), program name information (PNI), channel information before the change (OCI), Day before change (ODI), Program start time information before change (OST), Program end time information before change (OET), Channel information after change (RCI), Day information after change (RDI), Program start time information after change Client information using the Signaling Control Part 35 by configuring a program information change message M_3 that optionally includes an RST, a program end time information after the change, and a deletion information RI if the program is terminated. To (1), The client system 1 that has received the program information change message M_3 has a reservation program corresponding to the pre-change program information (BSI, PNI, OCI, ODI, OST, OET) included in the program information change message M_3. If the information exists on the memory 17 of the client system 1, the corresponding reserved program information is used by using the post-change information RCI, RDI, RST, RET, and RI included in the program information change message M_3. Client / server system and control method applying real-time electronic program guide, characterized in that for updating or deleting.