Abstract:
A broadcast program search method in a digital broadcasting radio receiving apparatus includes the step of activating the broadcast program search program and switching to a broadcast program search mode, the step of selecting a search item and setting the search condition of the search item by an operation by a user, the search step of performing search by the search item selected by the user on the basis of the selection of the search item and the set search condition of the search item, the channel selection step of selecting a channel on the basis of the search result in the search step, and the step of checking whether to again perform search if the search is unsuccessful, repeating the setting under the set search condition if search is to be again performed, and terminating the broadcast program search program if no search is to be again performed. A computer-readable storage medium recording a broadcast program search program for a digital broadcasting radio receiving apparatus is also disclosed. This storage medium includes processes equivalent to the steps of the above-mentioned broadcast program search method.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates to a broadcast program search method in a broadcast receiving apparatus for receiving a broadcast wave centering around DAB (Digital Audio Broadcasting) carried out in Europe, i.e., a broadcast wave which multiplexes a plurality of broadcast programs each containing audio data and broadcast program information and, more particularly, to a broadcast program search method in a digital broadcasting radio receiving apparatus by which a user can efficiently find a desired broadcast program, and a computer-readable recording medium recording a broadcast program search program.  
           [0003]    2. Description of the Prior Art  
           [0004]    Japanese Unexamined Patent Publication No. 10-107669 describes an example of a broadcast receiving apparatus for receiving a broadcast wave such as DAB, i.e., a broadcast wave which multiplexes a plurality of broadcast programs each containing audio data and broadcast program information. In the DAB broadcasting system, several broadcast programs (called services) are multiplexed on a certain frequency (called an ensemble), and several different broadcast contents (called service components) are contained in these broadcast programs.  
           [0005]    As shown in FIG. 1, a conventional broadcast receiving apparatus includes a DAB receiver  1 , a microcomputer controller  2  for controlling the DAB receiver  1 , an input unit  3  operated by a user, and a display unit  4  by which the user checks the state of reception. The microcomputer controller  2  comprises a CPU  7  and a memory  8 . The CPU  7  executes programs stored in the memory  8  to control the input unit  3 , the display unit  4 , and the DAB receiver  1 . Of these programs, a DAB control program  5  for controlling the DAB receiver  1  contains a broadcast program search program  6  in the prior art (Japanese Unexamined Patent Publication No. 10-107669).  
           [0006]    This conventional broadcast receiving apparatus having the above arrangement operates as follows.  
           [0007]    To find a desired broadcast program, a user presses a key or the like on the input unit  3  to switch broadcast programs one after another, and checks each broadcast program by a sound generated from a loudspeaker or information displayed on the display unit. The user repeats this operation until he or she finds the desired program.  
           [0008]    Unfortunately, this prior art has the following problems.  
           [0009]    That is, as described above, to find a desired broadcast program, a user presses a key or the like to switch broadcast programs one after another, and checks each broadcast program by a sound generated from a loudspeaker or information displayed on the display unit. In the DAB broadcasting system, however, a plurality of broadcast programs each containing audio data and broadcast program information are multiplexed. Therefore, to find a desired broadcast program by, e.g., a program type (to be abbreviated as a PTY hereinafter) as one broadcast program information, it is necessary, owing to the DAB format, to search as many as 16,384 program types (6 bits of a coarse code and 8 bits of a fine code, a total of 2 14 =16,384). This operation is difficult and cumbersome.  
           [0010]    Also, the conventional broadcast receiving apparatus with the above arrangement requires the following operation. That is, a user previously designates PTYs which he or she habitually listens to. From these previously designated PTYs, the use selects a PTY which he or she currently wants to search for or listen to, and searches for a broadcast program matching the selected PTY, by using the broadcast program search program  6  (a broadcast program searching means  56  in Japanese Unexamined Patent Publication No. 10-107669).  
           [0011]    Unfortunately, the search item is limited to a PTY. Therefore, if the broadcast program desired by the user is not found as a result of search, the user may be forced to perform the aforementioned cumbersome operation.  
           [0012]    Program types are, e.g., music, news, sport, and drama, and they are sometimes classified more finely. As an example, music is classified into classic, jazz, popular, and the like.  
         SUMMARY OF THE INVENTION  
         [0013]    The present invention has been made to solve the above problems of the prior art, and has as its object to provide a broadcast program search method in a digital broadcasting radio receiving apparatus by which a user can efficiently find a desired broadcast program, and a computer-readable storage medium recording a broadcast program search program.  
           [0014]    To achieve the above object, a broadcast program search method in a digital broadcasting radio receiving apparatus of the present invention is a broadcast program search method in a digital broadcasting radio receiving apparatus which comprises a DAB receiver which receives a DAB digital signal and transfers broadcast program information data in the digital signal to a microcomputer controller, an input unit operated by a user, a CPU for executing a stored program, a memory for storing a program, a microcomputer controller which receives the broadcast program information data and executes control by the program, a display unit for checking the state of each DAB broadcast station program, a DAB control program which controls the DAB receiver and analyses the broadcast program information data from the DAB receiver, and a broadcast program search program which starts operation upon a key operation of a user, characterized by comprising the step of activating the broadcast program search program and switching to a broadcast program search mode, the step of selecting a search item and setting the search condition of the search item by an operation by a user, the search step of performing search by the search item selected by the user on the basis of the selection of the search item and the set search condition of the search item, the channel selection step of selecting a channel on the basis of the search result in the search step, and the step of checking whether to again perform search if the search is unsuccessful, repeating the setting under the set search condition if search is to be again performed, and terminating the broadcast program search program if no search is to be again performed.  
           [0015]    A computer-readable storage medium recording a broadcast program search program of the present invention is a computer-readable storage medium recording a broadcast program search program for a digital broadcasting radio receiving apparatus which comprises a DAB receiver, a microcomputer controller which includes a CPU and a memory and controls the DAB receiver, an input unit operated by a user, a display unit for checking the state of reception, a program which is stored in the memory and controls the input unit, the display unit, and the DAB receiver, and a DAB control program which contains a broadcast program search program and controls the DAB receiver, characterized by comprising the process of activating the broadcast program search program and switching to a broadcast program search mode, the process of selecting a search item and setting the search condition of the search item by an operation by a user, the search process of performing search by the search item selected by the user on the basis of the selection of the search item and the set search condition of the search item, the channel selection process of selecting a channel on the basis of the search result in the search process, and the process of checking whether to again perform search if the search is unsuccessful, repeating the setting under the set search condition if search is to be again performed, and terminating the broadcast program search program if no search is to be again performed.  
           [0016]    The effect of the present invention is obvious from the above aspects. For example, if X types of PTYs, Y types of service labels, and Z types of service component labels are used, search takes about a few minutes when it is performed by checking sounds and displays. However, when the search method of the present invention is used, search can be performed within a few tens of seconds. Also, a user need only perform key operations several times. This eliminates the need to perform a cumbersome operation, by which a user operates keys to find a desired broadcast program, which is the problem of the prior art.  
           [0017]    In addition, a routine for storing search conditions in a memory obviates an operation of setting search items. This can release a user from this troublesome operation. Also, in the present invention, a PTY, a service label, and a service component label are used as search items. Therefore, unlike the conventional search in which the search item is limited to a PTY, a broadcast program desired by a user can be found without omission. Even if there is an omission, search can be again performed by changing the search conditions. Accordingly, search can be again performed even in a case where no broadcast program can be found by a PTY, which is the problem of the prior art.  
           [0018]    The above and many other objects, features and advantages of the present invention will become manifest to those skilled in the art upon making reference to the following detailed description and accompanying drawings in which preferred embodiments incorporating the principle of the present invention are shown by way of illustrative examples. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0019]    [0019]FIG. 1 is a block diagram showing the arrangement of an example of a broadcast receiving apparatus used in the present invention;  
         [0020]    [0020]FIG. 2 is a flow chart of a broadcast program search program according to the present invention;  
         [0021]    [0021]FIG. 3 is a flow chart of a search condition setting routine according to the first embodiment of the present invention;  
         [0022]    [0022]FIG. 4 is a flow chart of a search routine according to the first embodiment of the present invention;  
         [0023]    [0023]FIG. 5 is a flow chart of a PTY search routine according to the first embodiment of the present invention;  
         [0024]    [0024]FIG. 6 is a flow chart of a service label search routine according to the first embodiment of the present invention;  
         [0025]    [0025]FIG. 7 is a flow chart of a service component label search routine according to the first embodiment of the present invention;  
         [0026]    [0026]FIG. 8 is a channel selection routine according to the first embodiment of the present invention;  
         [0027]    [0027]FIG. 9 is a flow chart of a program information recording list formation routine according to the second embodiment of the present invention;  
         [0028]    [0028]FIG. 10 is a flow chart of a search condition setting routine according to the third embodiment of the present invention;  
         [0029]    [0029]FIG. 11 is a view showing the structure of a DAB transmission frame;  
         [0030]    [0030]FIG. 12 is a view showing the structure of an FIB made up of 256 bits;  
         [0031]    [0031]FIG. 13 is a view showing the structure of an FIG whose FIG type is 1(001) shown in FIG. 12;  
         [0032]    [0032]FIG. 14 is a view showing the structure of a Type 1 field whose Extension is 2 in an FIG data field shown in FIG. 13;  
         [0033]    [0033]FIG. 15 is a view showing the structure of a Type 1 field whose Extension is 1 in the FIG data field shown in FIG. 13, this Type 1 field containing data indicative of service label data; and  
         [0034]    [0034]FIG. 16 is a view showing the structure of a Type 1 field whose Extension is 4 in the FIG data field shown in FIG. 13.  
     
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS  
       [0035]    Several preferred embodiments of the present invention will be described below with reference to the accompanying drawings.  
         [0036]    [0036]FIG. 1 is a block diagram of an embodiment of a broadcast receiving apparatus used in the present invention. The broadcast receiving apparatus of this embodiment is a broadcasting receiver which operates by programs. This broadcast receiving apparatus includes a DAB receiver  1 , a microcomputer controller  2 , an input unit  3 , and a display unit  4 . The DAB receiver  1  receives a DAB digital signal and transmits broadcast program information data in the signal to the microcomputer controller  2 . The input unit  3  is used by a user to perform key operations. The microcomputer controller  2  has a CPU  7  for detecting the state of the input unit  3  and executing programs stored in a memory  8 . This microcomputer controller  2  operates by these programs. The display unit  4  displays the state of each broadcast program of DAB. The internal memory  8  of the microcomputer controller  2  contains a DAB control program  5  for, e.g., controlling the DAB receiver  1  and analyzing broadcast program information data from the DAB receiver  1 , and a broadcast program search program  6  which starts operating when a user performs a specific key operation.  
         [0037]    The overall operation of this embodiment will be described in detail below with reference to FIG. 1 and flow charts in FIGS.  2  to  8 .  
         [0038]    First, when a user wishes to find a desired broadcast program, he or she performs specific key inputting on the input unit  3  shown in FIG. 1 to start the operation of the broadcast program search program  6  shown in FIG. 1 and switch to a broadcast program search mode (step S 1  in FIG. 2). Next, the operation of a search condition setting routine  10  is started, and the user performs specific key inputting to select search items and set the search conditions of these search items. A search item is that specific information of a broadcast program, which is a condition for searching for the broadcast program.  
         [0039]    After the search condition setting routine  10  is completed, a search routine  11  starts operating to perform search on the basis of the search items selected by the user. If the search routine  11  finds a broadcast program on the basis of the search items selected by the search condition setting routine  10  (step S 2  in FIG. 2), the operation of a channel selection routine  12  is started. If no broadcast program is found (step S 2  in FIG. 2), a message for prompting the user to perform a key input operation is displayed on the display unit  4  shown in FIG. 1 to determine whether to again perform search (step S 3  in FIG. 2). If search is to be again performed (step S 3  in FIG. 2), the operation of the search condition setting routine  10  is started. If no search is to be again performed (step S 3  in FIG. 2), the broadcast program search program  6  is terminated.  
         [0040]    The operation of the search condition setting routine  10  is shown in the flow chart of FIG. 3. In this search condition setting routine  10 , the conditions of search concerning a broadcast program desired by the user are set. First, a search condition list and a search result list to be set by the search condition setting routine  10  are initialized (step S 10 ). The search condition list is a storage area for storing search conditions set for individual search items by a setting key (to be described later). When this search condition list is initialized, the operation of the search routine  11  shown in FIG. 2 need not be performed. The search result list is a storage area for storing the results of search by the search routine (to be described later). When this search result list is initialized, the broadcast program search program  6  can be terminated if the search result is NO in step S 2 , i.e., if the search condition setting routine  11  is interrupted or nothing can be found by the search routine  11 .  
         [0041]    Effective keys in FIG. 3 are a select key for selecting a search item, a setting key for setting a search condition for a selected search item, an interrupt key for interrupting the search condition setting routine  10 , and a decision key for storing the search condition of each search item and making the search routine  11  operable. In step S 11 , whether a key is effective is checked. If the key is found to be effective, the operation of the key is performed. If this effective key is the select key, search items are changed (step S 12 ). Examples of the search items are the PTY (a program type, e.g., news, music, and sport) of a broadcast program, a service label (a label which can be attached to a broadcast program), and a service component label (a label which can be attached to each individual broadcast content of a broadcast program). If the effective key is the setting key, the search condition of each search item is set (step S 13 ). For example, if the search item is a PTY, the “program type” of a desired broadcast program is set to “news”. If the effective key is the interrupt key, the search condition setting routine  10  is terminated (step S 14 ). If the effective key is the decision key, the search conditions set by the select key and the setting key are stored in the search condition list, and the search condition setting routine  10  is terminated (step S 15 ).  
         [0042]    The operation of the search routine  11  is shown in the flow chart of FIG. 4. In this search routine  11 , search is performed on the basis of the search conditions set in the search condition setting routine  10 . For example, in FIG. 4 the search items set by the search condition setting routine  10  are a PTY, a service label, and a service component label. In step S 20 , Flag is set to 0. This Flag is used as determination data to check the matching with the search result list for storing the search result of each search item, i.e., to check whether to perform step S 31  in which identical results for the same search item are removed.  
         [0043]    Next, whether to perform PTY search is checked (step S 21 ) by referring to the search condition list stored in the search condition setting routine  10 . If the search is to be performed, a PTY search routine is executed (step S 22 ), and Flag is set to 1 (step S 23 ). After the operation of the PTY search routine is executed (step S 22 ), or if no PTY search is to be performed, whether to perform service label search is checked (step S 24 ) by referring to the search condition list stored in the search condition setting routine  10 . If the search is to be performed, a service label search routine is executed (step S 24 ), and Flag is set to 1 (step S 26 ). After the operation of the service label search routine is executed (step S 24 ), or if no service label search is to be performed, whether to perform service component label search is checked (step S 27 ) by referring to the search condition list stored in the search condition setting routine  10 . If the search is to be performed, a service component label search routine is executed (step S 28 ), and Flag is set to 1 (step S 29 ). After the operation of the service component label search routine is executed (step S 28 ), or if no service component label search is to be performed, whether Flag is 1 is checked (step S 30 ). If YES in step S 30 , identical results in the search result list are removed (step S 31 ), and the search routine  11  is terminated. If NO in step S 30 , the search routine  11  is terminated.  
         [0044]    The operation of the PTY search routine is shown in the flow chart of FIG. 5. Broadcast program information on a broadcast wave received by the DAB receiver shown in FIG. 1 contains a plurality of receivable broadcast programs, and a broadcast program matching the PTY search condition is searched for. First, broadcast program information on a broadcast wave currently being received is searched for the PTY of a receivable broadcast program (step S 100 ). Whether this receivable PTY matches the PTY of the search condition is checked (step S 101 ). If YES in step S 101 , information pertaining to the receivable PTY is stored in the search result list (step S 102 ). If NO in step S 101 , the flow advances to step S 103 . In step S 103 , whether another searchable receivable PTY exists is checked. If YES in step S 103 , the flow returns to step S 100 . If NO in step S 103 , the PTY search routine is terminated.  
         [0045]    The operation of the service label search routine is shown in the flow chart of FIG. 6.  
         [0046]    As explained in the PTY search routine of FIG. 5, broadcast program information on a broadcast wave currently being received contains a plurality of receivable broadcast programs, and a broadcast program matching the service label search condition is searched for. First, broadcast program information on a broadcast wave currently being received is searched for the service of a receivable broadcast program (step S 110 ). The label of this receivable service is compared with the service label of the search condition (step S 111 ). If the comparison result is OK, information (SId, label) pertaining to the receivable service is stored in the search result list. If the comparison result is NG, the flow advances to step S 113 . In step S 113 , whether another searchable receivable service exists is checked. If YES in step S 113 , the flow returns to step S 110 . If NO in step S 113 , the service label search routine is terminated.  
         [0047]    The operation of the service component label search routine is shown in the flow chart of FIG. 7.  
         [0048]    As explained in the search routines of FIGS. 5 and 6, broadcast program information on a broadcast wave currently being received contains a plurality of receivable broadcast programs, and a broadcast program matching the service component label search condition is searched for. First, broadcast program information on a broadcast wave currently being received is searched for the service component of a receivable broadcast program (step S 120 ). The label of this receivable service component is compared with the service component label of the search condition (step S 121 ). If the comparison result is OK, information (SId, SCId label) pertaining to the receivable service is stored in the search result list. If the comparison result is NG, the flow advances to step S 123 . In step S 123 , whether another searchable receivable service component exists is checked. If YES in step S 123 , the flow returns to step S 120 . If NO in step S 123 , the service component label search routine is terminated.  
         [0049]    The operation of the channel selection routine  12  is shown in the flow chart of FIG. 8. In this channel selection routine  12 , a channel is selected on the basis of the search result list stored in the search routine  11 . First, No. is set to 1 (step S 40 ). This No. indicates the number of information to be selected from the search result list. A channel having this number No. in the search result list is selected (step S 41 ). A selected channel listening time is set (step S 42 ). Whether the search result list records only one program is checked (step S 43 ). If YES in step S 43 , the channel selection routine  12  is terminated. If NO in step S 43 , the flow advances to step S 44 . In step S 44 , whether the user has issued a selected channel determination request (a selected channel determination request is, e.g., to press a specific key if a program broadcast from a loudspeaker is the desired broadcast program). If YES in step S 44 , the channel selection routine  12  is terminated. If NO in step S 44 , the flow advances to step S 45 . In step S 45 , whether the selected channel listening time has elapsed is checked. If YES in step S 45 , the flow advances to step S 46 . If NO in step S 45 , the flow returns to step S 44 . In step S 46 , 1 is added to No. In step S 47 , whether the (No. −1)th broadcast program information in the search result list is the last one is checked. If YES in step S 47 , the flow returns to step S 40 . If NO in step S 47 , the flow returns to step S 41 . In this manner, the channels of broadcast programs in the search result list are selected in turn.  
         [0050]    The second embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Referring to a flow chart of a program information recording list formation routine shown in FIG. 9, the embodiment comprises step S 200  for forming a program information storage list concerning a PTY, step S 201  for forming a program information storage list concerning a service label, and step S 202  for forming a program information storage list concerning a service component label.  
         [0051]    The overall operation of this embodiment will be described in detail below with reference to the flow charts in FIGS. 2, 4,  5 ,  6 ,  7  and  9 .  
         [0052]    First, the program information storage list formation routine in FIG. 9 acquires program information pertaining to a PTY, a service label, and a service component label, during regular broadcasting reception, to be referred to when search is performed in the PTY search routine (step S 22 ), the service label search routine (step S 25 ), and the service component label search routine (step S 28 ) shown in FIG. 4 which is a flow chart of the search routine  11  shown in FIG. 2. Data of the program information storage list formed by this program information storage list formation routine is compared with the search conditions in step S 101  of the PTY search routine in FIG. 5, in step S 111  of the service label search routine in FIG. 6, and in step S 121  of the service component label search routine in FIG. 7. This improves the search speed and makes it possible to receive a broadcast program desired by a user.  
         [0053]    The third embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 10 is a flow chart of the search condition setting routine  10  in FIG. 2. In this embodiment, step S 300  for storing the set contents of search conditions by a search condition set content storage write key and step S 301  for reading out the set contents of search conditions by a search condition set content storage read key are added to FIG. 3 of the first embodiment.  
         [0054]    Details of the overall operation of this third embodiment will be explained below with reference to the flow chart in FIG. 10. This flow chart shown in FIG. 10 shows the operation of the search condition setting routine  10  in FIG. 2, and performs an operation similar to the flow chart shown in FIG. 3 in the explanation of the first embodiment. In this embodiment, the operations of steps S 300  and S 301  added to the flow chart in FIG. 3 will be described. In step S 11  of FIG. 10, whether a key is an effective key is checked. If the key is an effective key and this effective key is the search condition set content storage write key, a select key and a search condition set by the select key are written in a search condition storage list. The search condition storage list is a storage area for storing search conditions. If the effective key is the search condition set content storage read key, the contents of the search condition storage list are written in a search condition list. In this embodiment, a user can store the currently set search condition in the search condition storage list by using the search condition set content write key. For example, if a plurality of search condition set content storage write keys are available, the user can store a plurality of search conditions. To search for a desired broadcast program, the user can set desired search conditions at once by using the search condition set content storage read key. Since no search conditions need be input, search conditions can be efficiently set, i.e., search can be readily performed.  
         [0055]    FIGS.  11  to  16  illustrate information corresponding to individual search items of the embodiment.  
         [0056]    [0056]FIG. 11 is a view showing the structure of a DAB transmission frame. This transmission frame has a sync channel, FIC (Fast Information Channel), and MSC (Main Service Channel). The FIC is made up of a plurality of FIBs (Fast Information Blocks), and the MSC is made up of a plurality of CIFs (Common Interleaved Frames). DAB forms a broadcast wave by carrying various pieces of information on this transmission frame.  
         [0057]    [0057]FIG. 12 is a view showing the structure of the FIB. The FIB is composed of 256 bits and has a 30-byte FIB data field and a 16-bit CRC (Cycle Redundancy Check word). The FIB data field is made up of a plurality of FIGs (Fast Information Groups) as a useful data field, End marker, and Padding (an area for byte matching if 30 bytes of the FIG data field are not filled). Each FIG has FIG Type, Length (the bit length of an FIG data field subsequent to Length), and an FIG data field. FIG Type and Length form an FIG header.  
         [0058]    [0058]FIG. 13 is a view showing the structure of an FIG in FIG. 12 whose FIG Type is 1(001). This FIG is made up of Charset, OE (data indicating whether information in a Type 1 field belongs to this ensemble or another), Extension (the Extension number of FIG Type 1), and the Type 1 field.  
         [0059]    [0059]FIG. 14 is a view showing the structure of a Type 1 field when Extension in the FIG data field shown in FIG. 13 is 2. This Type 1 field contains Code which is data indicative of PTY data. Data following this Code changes in accordance with a C/F flag (Coarse/Fine flag): if the C/F flag is 0, the data is Coarse code (6 bits); if the C/F flag is 1, the data contains Coarse code and Fine code (8 bits).  
         [0060]    [0060]FIG. 15 is a view showing the structure of a Type 1 field when Extension in the FIG data field shown in FIG. 13 is 1. This Type 1 field contains service identification data (SId) indicating service label data, and a character data field (Character field). This character data field is the service label.  
         [0061]    [0061]FIG. 16 is a view showing the structure of a Type 1 field when Extension in the FIG data field shown in FIG. 13 is 4. This Type 1 field contains service component identification data (SId) indicating service component data, service identification data (SId), and a character data field (Character field). This character data field is the service component label.  
         [0062]    A computer-readable storage medium recording a broadcast program search program of the present invention will be described below with reference to the accompanying drawings.  
         [0063]    Referring to FIG. 1, in an environment having a DAB receiver  1 , a microcomputer controller  2  which controls the DAB receiver  1  and includes a CPU  7  and a memory  8 , an input unit  3  operated by a user, and a display unit  4  for checking the state of reception, the computer-readable storage medium recording the broadcast program search program of the present invention is a computer-readable storage medium recording a program which is stored in the memory  8  and controls the input unit  3 , the display unit  4 , and the DAB receiver  1 , and the broadcast program search program of the present invention contained in a DAB control program  5  for controlling the DAB receiver  1 .  
         [0064]    A broadcasting receiver which operates by programs includes the DAB receiver  1 , the microcomputer controller  2 , the input unit  3 , and the display unit  4 . The DAB receiver  1  receives a DAB digital signal and transmits broadcast program information data in the signal to the microcomputer controller  2 . The input unit  3  is used by a user to perform key operations. The microcomputer controller  2  has the CPU  7  for detecting the state of the input unit  3  and executing programs stored in the memory  8 . This microcomputer controller  2  operates by these programs. The display unit  4  displays the state of each broadcast program of DAB. The internal memory  8  of the microcomputer controller  2  contains the DAB control program  5  for, e.g., controlling the DAB receiver  1  and analyzing broadcast program information data from the DAB receiver  1 , and a broadcast program search program  6  which starts operating when a user performs a specific key operation.  
         [0065]    The broadcast program search program  6  is made up of a search condition setting routine  10  for, e.g., selecting a search item for searching for a broadcast program and setting the search condition of the search item, a search routine  11  for performing search by using the search item selected by a user, a channel selection routine  12  performed on the basis of the search by the search routine  11 , and a control routine for controlling these routines.  
         [0066]    The search condition setting routine  10  sets search conditions for a broadcast program desired by a user. Search items include a select key for selection, a setting key for setting the search condition of each search item, an interrupt key for interrupting the search condition setting routine  10 , and a decision key for storing the search condition of each search key and making the search routine  11  operable. Examples of the select key are the PTY (a program type, e.g., news, music, and sport) of a broadcast program, a service label (a label which can be attached to a broadcast program), and a service component label (a label which can be attached to each different broadcast content of a broadcast program).  
         [0067]    The search routine  11  performs search on the basis of the search conditions set by the search condition setting routine  10 . For example, in this embodiment, the search items set by the search condition setting routine  10  are a PTY, a service label, and a service component label. To avoid duplicate search by each selected item, the search condition setting routine  10  removes identical results from a search result list. In the search routine  11 , a PTY search routine, a service label search routine, and a service component label search routine are prepared. Broadcast program information on a broadcast wave currently being received contains a plurality of receivable broadcast programs. The search routine  11  searches these broadcast programs for one which matches the service label search condition.  
         [0068]    The channel selection routine  12  selects a channel on the basis of a search result list stored in the search routine  11 . In accordance with a number indicating the number of information to be selected from the search result list, the channel selection routine  12  selects a channel having the number No in the search result list, and sets a selected channel listening time. The channel selection routine  12  selects the channels of broadcast programs in the search result list in turn.  
         [0069]    A description of the operation of the broadcast program search program will be omitted, because the search method using the broadcast program search program of the digital broadcasting radio receiving apparatus has already been explained in detail with reference to FIG. 1 and the flow charts in FIGS.  2  to  8 .  
         [0070]    The second embodiment of the computer-readable storage medium recording the broadcast program search program will be described below. This embodiment comprises a routine for forming a broadcast program information storage list concerning a PTY, a routine for forming a broadcast program information storage list concerning a service label, and a routine for forming a broadcast program information storage list concerning a service component label. The operation of each routine has been described with reference to the flow charts in FIGS. 2, 4,  5 ,  6 ,  7 , and  9  in the second embodiment of the search method using the broadcast program search program, so a detailed description thereof will be omitted.  
         [0071]    The third embodiment of the computer-readable storage medium recording the broadcast program search program will be described below.  
         [0072]    In this embodiment, a routine for storing the set contents of a search condition set by a search condition set content storage write key and a routine for reading out the set contents of a search condition set by a search condition set content storage read key are added to FIG. 3 of the first embodiment of the search method using the broadcast program search program.  
         [0073]    The operation of each routine has been explained with reference to the flow chart in FIG. 10 in the third embodiment of the search method using the broadcast program search program, so a detailed description thereof will be omitted.