Abstract:
A method of organizing programming data includes receiving a data stream including programming guide, which includes information describing aspects of broadcast programming; extracting a plot synopsis data from the programming guide relating to a series-type genre broadcasting program; and storing the plot synopsis data in a memory.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
   This application claims the benefit of the Korean Application No. P2002-49749, filed Aug. 22, 2002, the disclosure of which is hereby incorporated by reference. 
   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a digital TV and, more particularly, to a digital TV and a method for managing program information thereof to view past and future contents of series-type broadcast programs. 
   2. Discussion of the Related Art 
   Recent technical developments in digital TVs include an innovative method of transmitting broadcast signals. The Republic of Korea launched the “Mugungwha” satellite in August of 1996, which started testing digital broadcasting in July of 1996. The Mugungwha satellite broadcasting system is different from earlier satellite broadcasting systems in that it digitally broadcasts at the standard definition TV (SDTV) level, which is similar to terrestrial digital broadcasting. 
   Along with increased use of digital broadcasting, broadcasting of high definition and high quality audio has begun through, for example, satellite, terrestrial wave and cable. Compared to previous analog TV, the digital broadcasting system has various advantages in addition to high definition and high quality audio. 
   Digital broadcasting compresses high definition, high quality audio and video (A/V) using a video/audio compression method (MPEG-2 or AC-3) and transfers the compressed A/V to respective users through a satellite, terrestrial or cable band using, for example, QPSK, VSB or QAM transmission methods. 
   This compression technology enables the provision of one channel with various services. With a terrestrial wave, a single channel can be provided with at least four channels at the standard definition (SD) level or one channel for the high definition (HD) level. In order for digital TV to provide various services, additional information is transmitted together with the A/V. This information enables the digital TV to provide services such as a broadcast program guide for a greater number of channels. 
   An illustration of the digital TV and of the functions of a related art broadcasting program guide are shown in  FIGS. 1 ,  2 ,  3 A, and  3 B. 
     FIG. 1  is a block diagram of a related art digital TV.  FIG. 2  illustrates a screen image of a TV having a broadcast program guide function according to the related art.  FIGS. 3A and 3B  illustrate screen images of a TV having a detailed information guide according to the related art. 
   A digital TV, as shown in  FIG. 1 , includes a channel decoder  10  which selects a channel chosen by a user from broadcast signals received through an antenna and receives the selected signal to be decoded into a digital stream form such as VSB, QPSK or QAM in accordance with transmission type. A demultiplexing unit  20  receives the digital stream decoded by the channel decoder  10  and separates the digital stream into video, audio, and additional information. A microcomputer  30  receives the additional information separated by the demultiplexing unit  20 , extracts necessary broadcast information and outputs a control signal in accordance with a user&#39;s demand. A video processing unit  40  receives the video signal separated by the demultiplexing unit  20  according to the control signal of the microcomputer  30  to process the video signal into a signal enabled to be displayed on a screen. 
   The video processing unit  40  includes a video decoder (not shown) which decodes the video signal output from the demultiplexing unit  20 . A video display unit  50  enables the signal decoded by the video decoder to be displayed on the screen. 
   The broadcast program guide function of the above-constituted related art digital TV is similar to a broadcast program guide presented by a newspaper, and enables a user to readily view on the TV screen certain information concerning the programs which are being broadcasted or which are to be broadcast later. This information may include, for example, the title, time schedule, synopsis and the genre of the programs. 
   An image of a general broadcast program guide is displayed on a screen, as shown in  FIG. 2 . A user can select a currently broadcast program, such as by highlighting the program within the guide using a remote control. As shown in  FIG. 3A , detailed program information is displayed so that the user can determine whether to view the currently broadcast program. The user could also select a program which is not currently being broadcast but which is to be broadcast later. The detailed information about the future program would be displayed, as shown in  FIG. 3B . 
   As mentioned in the above explanation, the previous broadcast program guide function enables the user to obtain detailed information about programs that are being broadcasted or that will be broadcast so the user can view or reserve the program. 
   However, the related art digital TV system does not provide detailed information about series-type broadcast programs which were previously broadcast. For example, some serial-type programs are shown on a daily or weekly basis, and a user would have no way of viewing detailed information about programs in the series which aired days or weeks before. 
   SUMMARY OF THE INVENTION 
   Accordingly, the present invention is directed to a digital TV and a method for managing program information thereof that substantially obviates one or more problems due to limitations and disadvantages of the related art. 
   An object of the present invention is to provide a digital TV, a digital TV receiver, and/or a method for managing program information which provides a user with information about past, present, and future contents of a series-type broadcast program. 
   Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims herein, as well as the appended drawings. 
   To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a method of organizing programming data includes receiving a data stream including a programming guide, which includes information describing aspects of broadcast programming; extracting a plot synopsis data from the programming guide relating to a series-type genre broadcasting program; and storing the plot synopsis data in a memory. 
   In another aspect of the present invention, a method of organizing programming data includes receiving a data stream including a programming guide, which includes information describing aspects of broadcast programming; receiving a user&#39;s input selecting one or more program titles for which the user wishes to catalog the plot synopses; extracting the plot synopses data from the programming guide for the programs selected by the user; and storing the program synopses data in a memory. 
   In a further aspect of the present invention, an apparatus for organizing programming data includes a receiver to receive a data stream including a programming guide, which includes information describing aspects of broadcast programming; a control unit to extract a plot synopsis data from the programming guide relating to a series-type broadcasting program; and a memory to store the plot synopsis data. 
   It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory, not limitative, and are intended to provide further explanation of the invention as claimed. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principle of the invention. In the drawings: 
       FIG. 1  is a block diagram of a general digital TV in accordance with the background art; 
       FIG. 2  illustrates a screen image of a TV having a broadcast program guide function according to the background art; 
       FIG. 3A  and  FIG. 3B  illustrate screen images of a TV having a detailed information guide according to the background art; 
       FIG. 4  is a block diagram of a digital TV according to the present invention; 
       FIG. 5  illustrates a flowchart of a method of managing programming information of a digital TV according to a first embodiment of the present invention; 
       FIG. 6  illustrates an image of a user ID and password screen of a digital TV according to the present invention; 
       FIG. 7  illustrates an image of a screen of a digital TV, listing several broadcast series programs for a user according to the present invention. 
       FIG. 8  illustrates a screen image of a menu of past and future episodes of a series-type program according to the present invention. 
       FIG. 9A  and  FIG. 9B  illustrate detailed information about an episode of the series-type program selected from the menu of  FIG. 8 ; and 
       FIG. 10  is a flowchart of a method of managing programming information of a digital TV according to a second embodiment of the present invention. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like parts. 
     FIG. 4  is a block diagram of a digital TV according to the present invention. As shown in  FIG. 4 , a digital TV according to the present invention includes a channel decoder  200 , a demultiplexing unit  300 , a microcomputer  400 , a video processing unit  500 , a display unit  600 , and a memory  700 . The channel decoder  200  selects a channel chosen by a user from broadcast signals received through an antenna  100  and receives a signal of the selected channel to be decoded into a digital stream form such as VSB, QPSK, or QAM in accordance with a transmission type. The demultiplexing unit  300  receives the digital stream outputted from the channel decoder  200  and outputs video information, audio information, and additional information. The memory  700  stores program information, which is obtained from the additional information, and user setup information. The memory  700  may be included in the TV or, alternatively, in an internal hard drive of a set top box, such as a satellite or cable receiver set top box. 
   Additionally or alternatively, the microcomputer may be connected to a modem  710  which may be used to send data to and access data from an Internet or other database server containing a memory which stores the program information. When the user requests information on a series-type broadcast program, the modem  710  sends a request to the server, thereby prompting the server to send detailed data of past, present and future episodes of the series-type broadcast program to the TV or set top box (e.g., a personal video recorder (PVR)). The user can specify the number of episodes of data for which the user desires to view summaries. The microcomputer  400  checks whether a program of the selected channel is a series-type broadcast program using the program information stored in the memory  700 , determines whether to store or erase various kinds of information about the respective programs, and outputs a control signal according to a user&#39;s demand. The video processing unit  500  receives the video information outputted from the demultiplexing unit  300  and outputs a video signal, enabling an image to be displayed on a screen according to the control signal of the microcomputer  400 . The display unit  600  displays the video signal on the screen. 
   The digital TV according to the present invention selects the channel chosen by the user from the broadcast signals inputted through the antenna  100  and the channel decoder  200 , then decodes the selected signal into digital stream form, such as VSB, QPSK or QAM, in accordance with transmission type. 
   The digital signal inputted to the demultiplexing unit  300  is separated into the video information, the audio information and the additional information. The additional information is stored in a storing means, such as the memory  700 , or a database via the microcomputer  400  and modem  710 . The video information is implemented into the picture and image through the video processing unit  500 . Finally, the audio information is implemented into sound and voice through an audio processing unit (not shown). 
   The additional information may include, for example, a program association table (PAT), a time date table/time offset table (TDT/TOT), and an event information table (EIT). The PAT may include various kinds of information about the orders of TV programs. The TDT/TOT may include time information of the respective programs. The EIT may include various kinds of information about program titles, program synopses, broadcast program restricting rates, program start and end times, program running times, and program genres. 
   The program information stored in the memory  700  is updated periodically or regularly. In one embodiment, whenever a user turns on the TV, the program information is updated. In another embodiment, the program information is updated at a predetermined interval established by the user even if the TV is not turned on. When the program information is updated, the microcomputer  400  determines whether the corresponding program is a series-type broadcast program, such as a sitcom, soap opera or other serial, using the genre information of the respective programs and then determines whether to store, delete or ignore the corresponding detailed program information. 
   A method of managing program information according to a first and a second embodiment of the present invention follows. 
     FIG. 5  is a flowchart of a method of managing a program of a digital TV according to first embodiment of the present invention.  FIG. 6  illustrates an image of a user ID and password screen of a digital TV according to the present invention.  FIG. 7  illustrates an image of a screen of a digital TV listing broadcast series for a user according to the present invention.  FIG. 8  illustrates a screen image of a menu of past and future episodes of a series-type program according to the present invention.  FIG. 9A  and  FIG. 9B  illustrate detailed information about an episode of the series-type program selected from the menu of  FIG. 8 . 
   A user inputs an ID and password, as shown in  FIG. 6 , through input means (not shown), such as a remote controller, in step S 11  of  FIG. 5 . The user selects a specific channel from broadcast signals received through an antenna  100  and designates a desired series-type program in step S 12 . The TV displays a menu of broadcast series-type programs reserved by the user, as shown in  FIG. 7 , so that the user can add, delete and/or select a program. If a program is selected, a user can view synopses of past, present or future episodes of the program, as shown in  FIG. 8 . 
   To obtain and store the detailed information about the series-type program, the demultiplexing unit  300  separates the signal outputted from the channel decoder  200  into video information, audio information, and additional information, and inputs the additional information to the microcomputer  400 . Meanwhile, the video information is implemented into picture and image through the video processing unit  500  and the audio information is implemented into sound and voice through an audio processing unit (not shown), such that the extraction and analysis of the additional information will not hinder the viewing of programs by the user. 
   Subsequently, the microcomputer  400  determines whether to update the program information according to an update period set up by a user in step S 13 . In this case, in order to judge whether to update the program information stored in the memory  700 , the microcomputer  400  reads user-setup information stored in the memory  700 . The user-setup information includes the update period of the program information, (e.g., every 4 hours, every 8 hours) user authentication information such as a user ID and a user password, and the like. 
   If it is determined that the program information stored in the memory  700  is to be updated, the microcomputer  400  reads end times of the respective programs from the program information stored in the memory  700  in step S 14 . The microcomputer  400  compares the end times of the programs to a current time in step S 15 . If there exists a program that has been previously broadcasted before the current time, the microcomputer  400  reads the genre information and the user authentication information of the corresponding program from the memory  700  in step S 16 . 
   It is determined whether the program is a series-type broadcast program by reading genre information in step S 17 . As a result of the determination in step S 17 , if the program is a broadcast series, the ID and password which are inputted by the user are compared to the user authentication information to determine whether the current user is an authorized user in step S 18 . If the current user is an authorized user, the information about the program is stored in the memory  700  as it is in step S 19 . On the other hand, if the program is not a broadcast series, the information about the program is deleted from the memory in step S 20 . Namely, even if the program has been broadcast, the information about the program is saved in the memory  700  instead of being deleted, if the program is a broadcast series. 
   New information about the programs is updated from the additional information while the information about the previously broadcasted program is stored in the memory  700 . 
   When the user requests detailed information of the program on displaying broadcast program guide information in step S 21 , the above-stored program information verifies whether the program is a broadcast series in step S 22 . If the program is a broadcast series, then an image, as shown in  FIG. 9A , is displayed on the TV screen for the user in step S 23  and icons enabling the user to select detailed information about a current broadcast and information about previous broadcasts, respectively, of a program are displayed on the screen. However, if the program is not a broadcast series, current detailed information about the corresponding program is displayed only in step S 24 . 
   If the user intends to see the information for the previous broadcast of the program, the user selects an icon corresponding to the previous broadcast to display the information about the previous broadcast, as shown in  FIG. 9B . If the user selects a confirmation button, the image is shifted to the previous image. If a left/right arrow button is selected, detailed information about the next/last program centering around the displayed broadcast program is shown on the screen. Moreover, if the user selects a delete button, the corresponding program is erased from an internal memory  700 . 
     FIG. 10  illustrates a flowchart of a method of managing a program of a digital TV according to a second embodiment of the present invention. The demultiplexing unit  300  separates broadcast signals received through the antenna  100  into video information, audio information, and additional information and then inputs the additional information to the microcomputer  400 . 
   Subsequently, the microcomputer  400  determines whether to update program information according to an update period set up by a user. If the update period is, for example, an hour, the program information stored in the memory  700  should be updated every hour. If it is determined that the program information stored in the memory  700  needs to be updated, the microcomputer  400  reads end times of the respective programs from the program information stored in the memory  700  in step S 31 . 
   The end times of the programs are compared to a current time in step S 32 , the programs are classified into previously broadcasted programs and the other programs that are currently broadcasted or are to be broadcasted. For the programs that are currently broadcasted or are to be broadcasted, the information about the programs is stored in the memory  700 . For the programs determined to be broadcasted before the current time, genre information of the programs is read from the memory  700  in step S 33 . It is determined whether the programs broadcasted prior to the current time are broadcast series using the read genre information in step S 34 . 
   As a result of the determination in step S 34 , if there exists a program of the broadcast series, the information about the program is left in the memory  700  in step S 35 . On the other hand, if the programs are not broadcast series, the information about the programs is erased from the memory in step S 36 . Hence, the information about the programs of the broadcast series among the previously broadcasted programs is stored in the memory  700 , while the other information about the programs failing to be a broadcast series is erased from the memory  700  only. 
   As explained in the foregoing description, the method of managing the program information of the digital TV or set top box according to the present invention updates the broadcast program guide information stored in the internal memory as time elapses. The present invention determines whether the prior information, which used to be automatically erased from the internal memory, is deleted or kept in memory according to the genre information of the corresponding program. 
   Namely, when the user-setup time comes, a CPU reads the end time information about the broadcast programs of the respective channels from the memory to compare to the current time. If the end time of the program is prior to the current time as a result of the determination (which means that the program has ended), the CPU checks the genre information about the ended program. If the program is a broadcast series and is designated by the user, the CPU stores the information about the program in the internal memory. 
   Accordingly, the method of managing the program information of the digital TV according to the present invention enables the user to store, delete, and edit a list of broadcast series programs in accordance with the user&#39;s preference, and the listed programs will have their detailed information, which include a synopsis of the episode stored in the memory  700 . Thus, if the user misses the previous broadcast, the user can view a synopsis of the previous broadcast as well as other broadcast information (actors, guest stars, rating, etc.) to “catchup” on a missed episode in the plot of the series. Therefore, the present invention provides the user with greater convenience in viewing information on the contents of a broadcast series. 
   It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. 
   In an alternate embodiment, internet-based mega-memory can store all plot summaries or synopses for all series-based programs. A user selects a desired series-based program, and the user&#39;s receiver then accesses the mega-memory to obtain a list of stored plot synopses. Access to the service may be fee-based, for example, by subscription or pay-per-use basis. The alternate embodiment saves memory space on the user&#39;s receiver and provides user access to more, e.g., all plot synopses.