Abstract:
A method and apparatus to manage recorded broadcasting programs, in which a list of each of the recorded programs is automatically generated using electronic program guide (EPG) information for more efficient management of the recorded programs. The method includes: (a) detecting information on a starting time and an ending time for recording when a recording mode is enabled; (b) extracting information on programs included between the starting time and the ending time, respectively, from electronic program guide (EPG) information, and (c) storing the information extracted in step (b) in a file allocation table (FAT) to be matched with information on recording time and locations of corresponding programs recorded in a recording unit.

Description:
This application claims the priority of Korean Patent Application No. 2002-63846, filed on Oct. 18, 2002, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a method and apparatus for recording a television (TV) broadcasting program, and more particularly, to a method and apparatus for automatically generating and managing a list of broadcasting programs recorded on a recording unit. 
     2. Description of the Related Art 
     As data processing technologies are particularly developing in the field of televisions, broadcasting stations are becoming able to transmit various kinds of additional information, including general information on TV programs, together with video and audio signals, and users can receive through TV receivers and utilize such additional information for many purposes. 
     In other words, typical analog broadcasting systems have transmitted a very limited amount of additional information. Thus, it has not been possible to provide users with various services because there is a limit to the additional information that can be inserted and transmitted in predetermined intervals of horizontal synchronization signals. However, recently developed digital broadcasting systems can massively transmit additional information for users&#39; conveniences. Such additional information includes not only electronic program guide (EPG) information including general information on TV programs but also information regarding education, games, on-line commercial transactions, etc., and the coverage of the additional information is inclined to increase. 
     In addition, the range of functions of a digital TV receiver is likely inclined to increase from a basic function for processing the broadcasting signals and outputting them through a display device to a function for recording broadcasting programs on a recording unit, such as a hard disc drive (HDD), incorporated in the digital TV receiver in accordance with a user&#39;s preferences. 
     Usually, a list of recorded broadcasting programs is stored in a file allocation table (FAT) of a HDD for efficient management thereof. However, in a conventional method of managing the list of recorded broadcasting programs, title information of only a starting program, i.e., a broadcasting program that corresponds to the starting time of recording, has been extracted from EPG information and stored in the FAT, together with track information and information on the recording time. That is, in a case where two or more programs are recorded at one time in the same file, only the starting program can be managed since only the title information of the starting program is stored in the FAT. Thus, it is hard to know and impossible to access directly each of the other programs recorded in the same file as the starting program. As well, many inconveniences in managing the recorded programs exist. 
     SUMMARY OF THE INVENTION 
     The present invention provides a method and apparatus for managing recorded broadcasting programs, in which a list of each of the recorded programs is automatically generated using electronic program guide (EPG) information for more efficient management of the recorded programs. 
     According to an aspect of the present invention, there is provided a method of managing a list of recorded broadcasting programs, which includes the steps of (a) detecting information on a starting time and an ending time of recording when a recording mode is enabled; (b) extracting information on programs included between the starting time and the ending time, respectively, from electronic program guide (EPG) information, and (c) storing the information extracted in step (b) in a file allocation table (FAT) to be matched with information on the recording time periods and locations of corresponding programs recorded in a recording unit. 
     According to another aspect of the present invention, there is provided an apparatus for managing a list of recorded broadcasting programs, which includes a broadcasting signal receiving unit for selecting and demodulating only such broadcasting signals that correspond to a selected channel from received broadcasting signals in accordance with a channel control signal; a memory for storing electronic program guide (EPG) information separated from the broadcasting signals received through the broadcasting signal receiving unit; a recording unit for storing a broadcasting program selected in a recording mode; and a controller for implementing control processes of extracting information on programs included between the starting time and the ending time, respectively, from the EPG information, and storing the extracted information in a file allocation table (FAT) to be matched with information on the recording time periods and locations of corresponding programs recorded in the recording unit. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects and advantages of the present invention will become more apparent by describing in detail preferred embodiments thereof with reference to the attached drawings in which: 
         FIG. 1  is a block diagram of an apparatus for managing a list of recorded broadcasting programs according to the present invention; 
         FIG. 2  is a flowchart of a method of managing a list of recorded broadcasting programs according to the present invention; 
         FIG. 3  is a schematic diagram of an example of an upper level menu displaying a list of recorded broadcasting programs according to the present invention; and 
         FIG. 4  is a schematic diagram of an example of a lower level menu displaying a detailed list of sub programs recorded in connection with a main program according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In a digital broadcasting system, audio and video data streams are compressed in a format of digital information data, and system and program information are compressed in accordance with a program and system information protocol (PSIP). Information other than audio and video data information, e.g., information regarding a broadcasting program, is decoded and displayed on a screen as electronic program guide (EPG) information via an adequate graphic signal processing procedure. 
     The PSIP is an ATSC standard for digital broadcasting using ground waves or through cables, in which standards for program information and system information are defined. More specifically, the PSIP defines a method of providing various kinds of information on broadcasting programs by parsing broadcasting signals encoded in accordance with an MPEG (Moving Picture Experts Group) standard. 
     Referring to  FIG. 1 , an apparatus for managing a list of recorded broadcasting programs according to the present invention includes an antenna  101 , a tuner  102 , a channel decoder  103 , a demultiplexer  104 , an audio data processor  105 , a video data processor  106 , a speaker  107 , a mixer  108 , a display device  109 , a hard disc drive (HDD)  110 , a key input device  111 , a controller  112 , a graphic signal processor  113 , a memory  114 , and a timer  115 . 
     The apparatus shown in  FIG. 1  basically operates as follows. When a TV is powered on and a channel is selected using keys of the key input device  111 , the tuner  102  receives a channel control signal from the controller  112 , and in accordance with the channel control signal, selects such broadcasting signals that correspond to the selected channel from broadcasting signals received through the antenna  101 . The selected broadcasting signals are output to the channel decoder  103 . Then, the channel decoder  103  recovers digital signals detected from the selected broadcasting signals in the unit of packets and outputs the recovered digital broadcasting signals to the demultiplexer  104 . The demultiplexer  104  separates audio data, video data, and additional information data from the recovered digital broadcasting signals and outputs the separated audio, video, and additional information data in different bitstreams. 
     The separated audio data is decoded and converted to analog signals through the audio data processor  105 , and the converted analog audio signals are ultimately output through the speaker  107 . 
     Meanwhile, the separated video data is decoded and is subject to signal processing such as error corrections through the video data processor  106 . The decoded video data is mixed with graphic signals produced from the graphic signal processor  113  via the mixer  108 , and the mixed signals are ultimately output via the display device  109 . 
     The additional information data separated by the demultiplexer  104  includes electronic program guide (EPG) information. The EPG information input to the controller  112  is stored in the memory  114  under the control of the controller  112 . 
     The timer  115  generates time information. The HDD  110  receives from the channel decoder  103  and stores the audio and video data of a broadcasting program selected by a user in a normal or a reserved recording mode and outputs reproduced audio and video data of a recorded broadcasting program to the channel decoder  103  in a reproduction mode. 
     The HDD  111  includes a file allocation table (FAT) in which information regarding the broadcasting programs is recorded on the HDD  111 . A method of managing the FAT in a normal or a reserved recording mode will now be described with reference to  FIG. 2  together with  FIG. 1 . 
     The controller  112  determines whether a recording start instruction to start normal or reserved recording operations is generated in accordance with a corresponding key value input through the key input device  111  (STEP  210 ). 
     In accordance with the recording start instruction received in STEP  210 , audio and video data of a selected broadcasting program is stored at unrecorded locations of the HDD  110  and information on the present time corresponding to the starting time for recording is detected from the timer  115  (STEP  220 ). 
     Thereafter, the controller  112  determines whether a recording stop instruction to terminate the normal or the reserved recording operations is received in accordance with a corresponding key value input through the key input device  111  (STEP  230 ). 
     If the recording stop instruction is received in STEP  230 , the corresponding recoding operations are disabled in the HDD  110  and information on the present time that corresponds to the ending time for recording is detected from the timer  115  (STEP  240 ). 
     Thereafter, the controller  112  extracts information on the broadcasting programs recorded between the starting time and the ending time for recording from EPG information stored in the memory  114  (STEP  250 ). 
     Thereafter, the controller  112  analyzes the information extracted in STEP  250  in terms of titles, recorded time, and recorded locations of the recorded broadcasting programs and updates the FAT of the HDD  110  with the analyzed information (STEP  260 ). 
     When a recorded program list menu is called for later after the recording of the broadcasting programs, the controller  112  performs a control process to display recorded program lists specified as shown in  FIGS. 3 and 4  using the FAT produced in accordance with the flowchart of  FIG. 2 . 
     That is, when a program list display mode is selected, the controller  112  reads information required for an upper level program list menu from the FAT of the HDD  110 , and the read information data is processed through the graphic signal processor  113  and displayed on a screen as shown in  FIG. 3 . Referring to  FIG. 3 , the upper level program list menu includes the number of detailed lists of the recorded programs, titles of programs corresponding to starting times of recordings, and total recording time information of each recording. 
     Accordingly, the upper level program list menu shown in  FIG. 3  indicates that, for example, broadcasting programs starting with PROGRAM 1 are recorded for 100 minutes and are stored in the first recorded program list. However, a user is not able to know whether the first program list includes only PROGRAM 1 or multiple programs in addition to PROGRAM 1 from the upper level program list menu shown in  FIG. 3 . 
     To solve this problem, a detailed list menu as shown in  FIG. 4  is provided using the FAT produced in accordance with the flowchart of  FIG. 2 . That is, when a detailed display mode is selected in the upper level program list menu, the controller  112  performs a control process to display a detailed list of the programs included in the selected upper level program by matching titles and recording time periods of the detailed programs. 
     For example, when a user selects the detailed display mode after selecting PROGRAM 1 in the upper level program list menu using an up or down cursor key of the key input device  111 , the controller  112  reads information on the titles and the recording time periods of the detailed programs recorded together with PROGRAM 1 for 100 minutes from the FAT stored in the HDD  110 , and the read information data is processed through the graphic signal processor  113  and displayed on the screen as shown in  FIG. 4 . 
     Referring to  FIG. 4 , the detailed program list menu indicates that PROGRAM 1 recorded for 100 minutes includes PROGRAM A recorded for 10 minutes, PROGRAM B for 20 minutes, PROGRAM C for 10 minutes, PROGRAM D for 10 minutes, PROGRAM E for 30 minutes, and PROGRAM F for 20 minutes. In this case, the title of PROGRAM 1 is the same as that of PROGRAM A. 
     If an edit mode is selected for a program, e.g., PROGRAM B, among the detailed programs displayed as shown in  FIG. 4 , the controller  112  moves the selected PROGRAM B to the nearest unrecorded location of the HDD and deletes the title of PROGRAM B from the detailed list shown in  FIG. 4 . After editing PROGRAM B, the edited PROGRAM B can be added via the upper level program list menu. If a delete mode is selected, the selected program is erased from the HDD  110  and the corresponding information is deleted from the FAT of the HDD  110 . Further, when a play or reproduction mode is selected, the controller  112  traces the location where the selected program is stored and reproduces the selected program. Accordingly, it is possible to access directly and to edit each and every detailed program recorded on a HDD together with a main program. 
     As described above, according to the present invention, a detailed list of recorded broadcasting programs together with a main program is automatically produced using EPG information. Therefore, it is possible to manage effectively each and every program recorded with the main program and access and edit the respective recorded programs. 
     The present invention can be implemented on a recording unit with a code that is readable by a computer. The recording unit that can be read by a computer may include any kind of recording devices in which data that is readable by the computer is stored. Examples of the recording unit include ROM, RAM, CD-ROM, magnetic tape, hard discs, floppy discs, flash memory, optical data storage devices, and even carrier waves, for example, transmission over the Internet. Moreover, the recording unit may be distributed among computer systems that are interconnected through a network, and the present invention may be stored and implemented as a code in the distributed system. 
     While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.