JP2000092401A - Receiving device, and recording and reproducing device for digital broadcast program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a viewer to easily select and view a desired program. SOLUTION: Character information held in character information buffers 2042 and 213 of a main reception part MR, and a subordinate reception part SR can be retrieved by a character information retriever 214 and a user inputs a character string as a retrieval key through a retrieval key acceptor 215, so that the corresponding character information is retrieved and sent to an output information generator 216. This output information generator 216 adds message information held previously in an output information raw material data hold part 217, in accordance with the retrieval result of the character information retriever 214 to the retrieval result and sends the result out as output information to an image processing circuit 206 and an audio processing circuit 207. Through performing those processings, a viewer only needs to input the character string as the retrieval key to easily understand a channel in which a program having desired contents is broadcast, and the desired program can be selected and viewed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast number receiving apparatus for receiving a digital broadcast program of a plurality of channels created by multiplexing program material data, and a digital broadcast program recording for recording and reproducing the digital broadcast program. It relates to a playback device.

[0002]

2. Description of the Related Art In a conventional television / radio broadcast, when a viewer watches a desired program, he or she checks a broadcast time and a channel by looking at a latte column of a newspaper or a broadcast program information magazine, and then switches the channel at that time. This is done by selecting. If there is a dedicated channel for program guide in satellite broadcasting or CATV broadcasting, etc., select and operate that channel once, find the desired program by looking at the program schedule and comments on the screen, and confirm the broadcast time and channel. , By selecting the channel at that time. Regarding the broadcast time, a broadcast system called video-on-demand (VOD) has been put to practical use, which allows a viewer to select a program and view the program at a desired time from the beginning.

[0003] However, in the conventional television / radio broadcasting system as described above, a viewer must search for a desired program by relying on some kind of program guide information.
In recent years, in the case of television / radio broadcasting, digitalization has entered the multi-channel era, and it is expected that it will be difficult for viewers to search for a desired program.

[0004] Further, with the digitization of broadcasting, a device for recording and reproducing the digital broadcasting program can be integrated with a personal computer, and the received data can be stored in a large-capacity storage medium (for example, a hard disk device). By storing, a large number of broadcast programs can be stored. However, with such a digital broadcast program recording / playback apparatus, it is not easy for the viewer to grasp the recorded content, and in this case, it is expected that the viewer will have difficulty in searching for the desired program. You.

[0005]

As described above, in a television / radio broadcasting system, a multi-channel era is approaching due to digitization, and a viewer can easily select and view a desired program. Is desired. In a digital broadcast program recording / playback apparatus,
Although a large number of broadcast programs can be recorded using a large-capacity storage medium, it is desired that the viewer can easily select and view a desired program.

The present invention has been made in view of the above circumstances, and provides a digital broadcast program receiving apparatus and a digital broadcast program recording / reproducing apparatus which allow a viewer to easily select and view a desired program. Aim.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, a digital broadcast program receiving apparatus according to the present invention receives program data obtained by combining program material data including character information based on program information. Then, after receiving the program data of the designated channel, separating the program information and the material data, decoding and decoding, and temporarily holding each, a main receiving unit, and a channel other than the receiving channel of the main receiving unit. After receiving the program data and separating the character information, decode and temporarily store the sub-receiver, and the character string input as the search key is stored in the main receiver and the sub-receiver. Character information searching means for searching a channel from information and identifying a channel including the detected character information; a character string search result and a channel obtained by this means; A configuration that includes a search result display means for presenting the at least one of an image or voice recognition result.

In this configuration, if the program creator inputs a character string such as a keyword indicating the program content as character information, the viewer inputs a character string as a search key, and the program of each channel is displayed. The character string of the search key can be searched from the included character information, and by presenting the search result and the information of the channel including the detected character string by image display or voice, the viewer can It becomes possible to select a program having desired contents from programs currently being broadcast.

[0009] Specifically, the search result presentation means, when there is a character string of a search key in the character information search means,
An image or sound indicating the character string of the search key and the channel in which the character string is found is generated, and synthesized with the image or sound material indicating the guide information and output. If a character string is not found, an image or sound of the character string of the search key is generated, and is synthesized with an image or sound material indicating that there is no corresponding channel and output.

A digital broadcast program recording / reproducing apparatus according to the present invention stores program data in which program material data including character information is combined based on program information on a recording medium, and reproduces arbitrary program data. A program information storage unit that stores only program information of the program data; a material storage unit that stores only program material data of the program data; and a character string input as a search key. Character information searching means for searching from the character information stored in the program information, and searching for the program information of the program having the character information searched by the means from the program information stored in the program information storage section. A program information search means for identifying the program selection number and the program title, and a character string search result obtained by this means, the program selection number and the program title, A configuration that includes a search result display means for presenting the at least one of voice.

In this configuration, if the program creator inputs a character string such as a keyword indicating the contents of the program as character information, the viewer inputs the character string as a search key, and the program is included in each program. The character string of the search key can be searched from the character information, and the search result, the selection number of the program including the detected character string, and the program title can be displayed in an image or by sound to allow viewing. The user can select a program having desired contents from the recorded programs.

[0012] Specifically, the search result presenting means, when there is a character string of a search key in the character information searching means,
It generates an image or sound indicating the character string of the search key and the program selection number and the program title identified by the program information search means, and synthesizes and outputs the image or sound material indicating the guide information, and outputs the character information. When the character string of the search key is not found by the search means, an image or a sound of the character string of the search key is generated, and is synthesized with an image or sound material indicating that there is no corresponding program, and is output.

In the present invention, MPEG4 (Moving Picture)
Object processing by the Experts Group phase 4) is available. That is, in MPEG4, since transmission is performed in units of objects, the attribute values, transmission rates, and contents can be determined in units of objects. Therefore, the character string search result, the channel, the program selection number, and the program title are each set as an image or sound object, and are synthesized with a guide image or sound object to easily generate and output a guide image or sound. It becomes possible.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. (First Embodiment) FIGS. 1 and 2 show the overall basic configuration of a digital broadcasting system to which the present invention is applied. That is, this system includes a digital broadcast program transmission system 101 (FIG. 1) for creating and broadcasting a program, and a digital broadcast program receiving apparatus 201 (FIG. 2) installed in each home or the like and having a function of receiving a digital broadcast program. .

In the digital broadcast program transmission system 101 shown in FIG. 1, program materials used in a program are taken in by a plurality or a plurality of types of material input devices 102. The material input device 102 varies depending on the type of program material. For example, a video camera is used for moving images, a scanner is used for still images, a microphone is used for audio, and P is used for characters.
C and the like. Further, the number of the material input devices 102 is not limited. All captured program material is digitized and MP
Program data storage device 1 as an object by EG4
03.

On the other hand, the program production device 104 reads the program material stored in the program data storage device 103,
The program is edited by determining the attribute values (display timing, display interval, vertical relationship between the materials, size, position, etc.) of the program material to be used. These program material attribute values are collectively stored in the program data storage device 103 as program information.

The program sending device 105 sends out programs sequentially according to the broadcast schedule by registering the program data stored in the program data storage device 103 in advance. When the transmission of the program is started, the program information and the program material are transferred to the encoder 106 according to the schedule determined in accordance with the information of the program data.

The encoder 106 has a data type,
For example, dedicated ones are started in accordance with types of program information, moving images, still images, sounds, characters, and the like, and sequentially perform encoding processing. The number of activated encoders depends on the number of program materials transmitted at that time.

The encoded program information and program material are multiplexed by a multiplexing device 107 and transmitted by a transmitting device 108.
After adding a synchronization code, an error correction code, and the like, the packet is decomposed into a plurality of packets, and then transmitted as a digital broadcast on a predetermined channel. Data transmission paths include not only communication satellites, but also terrestrial, CATV, broadcasting satellites, telephone lines,
There is the Internet.

Digital broadcast program receiving apparatus 20 shown in FIG.
In 1, a channel signal from a plurality of broadcasting stations provided with the digital broadcast program transmission system 101 having the above configuration is first selectively received by the receiving circuit 202 of the main receiving unit MR and demodulated as a data packet. After that, the data is separated according to the type of each data. The separated data are sent to decoders 2031 to 2035, respectively.

These decoders 2031 to 2035 are
Each data type, that is, program information, character information,
It is dedicated to moving image information, still image information, and audio information, and performs decoding processing of input data. The decoded program data is stored in corresponding buffers 2041 to 20 respectively.
45 temporarily held. Here, the output of the program information buffer 2041 is sent to the program information processing circuit 205, and a character information buffer (in consideration of a case where one program has two or more types of character information, the number corresponding to the type is prepared) Outputs of the video information buffer 2042, the moving image information buffer 2043, and the still image information buffer 2044 are sent to the image processing circuit 206, and the output of the audio information buffer 2045 is sent to the audio processing circuit 207.

The program information processing circuit 205 instructs the image processing circuit 206 and the audio processing circuit 207 to reproduce the received program material in accordance with the program information. The image processing circuit 206 performs a drawing / reproduction process in accordance with an instruction from the program information processing circuit 205 so that the designated program material is arranged in the designated position and in a vertical relationship, and displays it on the screen of the CRT 208. Similarly, the audio processing circuit 207
Performs an audio reproduction process so that the specified program material is reproduced at a specified volume (volume) according to an instruction from the program data processing circuit 205, and outputs an audio from an audio output device (such as a speaker) 209.

Further, the receiving apparatus 201 includes a sub receiving section SR including a plurality of character information obtaining circuits 2101 to 210n. Character information acquisition circuits 2101 to 210n
All have the same configuration, and include a receiving circuit 211, a decoder 212, and a character information buffer 213, for example, receive broadcast data of a channel previously selected or subscribed by a viewer, and separate character information in the broadcast data. To decode and hold temporarily.

The main receiving section MR and the sub receiving section SR
The character information held in the character information buffers 2042 and 213 can be searched by the character information searcher 214, and the user can search through the search key accepting unit (keyboard input, menu selection, voice input, etc.) 215. By inputting a character string serving as a key, the corresponding character information is retrieved and sent to the output information generator 216. The output information generator 216 adds the message information held in advance in the output information material data holding unit 217 to the search result in accordance with the search result of the character information search unit 214, and outputs the image information to the image processing circuit 206 and the audio processing The signal is sent to the circuit 207.

In the above configuration, the processing contents of the receiving apparatus will be described below by giving an example. First, in the above-mentioned digital broadcasting system, a program creator adds some supplementary information to a program so that the viewer can perform a program search process on an interesting matter. For example, in order to know whether there is a program in which a singer named "Yoko Yamada" has appeared among programs currently being broadcast, including programs that the viewer has not watched, The creator embeds information such as keywords in character information in the program.

Here, the program receiving apparatus 201 is provided with a character information search unit 214, a search key accepting unit 215, an output information generator 216, and an output information material data holding unit 217. The search key accepting unit 215 receives an object of interest to the viewer as character information. Search key acceptor 21
The character string (keyword) input to 5 is sent to the character information search unit 214.

In addition to the currently displayed program (hereinafter referred to as a front program) currently being received by the main receiving unit MR, a program which has been received by the sub receiving unit SR but has not been decoded and displayed (hereinafter referred to as a back program) Program). Only the character information data of the counter-program data is decoded and stored in the character information buffer 213.

The character information search unit 214 performs the processing shown in FIG. First, the character string of the key sent from the search key accepting unit 215 is received (S11). Next, a work list (hereinafter, this list is referred to as a "hit program list")
Is emptied (S12). Next, one of the character information buffers 2042 of the front program is selected (S13), and the character string of the search key is searched for the full text from the character information held in the selected character information buffer (S14). As a result of the full-text search, it is determined whether or not the data in the character information buffer includes a search key (S15). If the search key is included, the channel number received by the buffer is registered in the hit program list (S16). . If the data in the character information buffer does not include the search key, step S16 is not performed. Next, it is determined whether there is another buffer for the front program (S17). If there is, a buffer for the front program is selected (S18), and the process returns to step S14 to perform a full-text search for the character string of the search key. Thereafter, similar search processing is performed.

When the search processing for the buffer of the front program is completed, next, one of the character information buffers of the counter program is selected (S19), and the character string of the search key is full-text searched (S2).
0), it is determined whether the data in the character information buffer includes a search key (S21), and if so, the channel number of the buffer received is registered in the hit program list (S22). If the data in the character information buffer does not include the search key, step S22 is not performed. Next, it is determined whether there is another buffer for the counterprogram (S23). If so, the buffer for the counterprogram is selected next (S24), and the process returns to step S20 to perform a full-text search for the character string of the search key. Thereafter, similar search processing is performed.
When the search processing for the buffer of the front and back programs is completed by the above processing, the hit program list is output to the output information generator 216.

The output information generator 216 performs the processing shown in FIG. First, a character string of a hit program list and a search key is received from the character information searcher 214 (S31). Next, it is determined whether or not the hit program list is empty (S32),
If it is not empty, the data of the channel notification image and the channel notification sound as shown in FIG. 5A is obtained from the output information material data holding unit 217 (S33). next,
An image is generated by combining the channel notification image, the search key character string, and each element in the hit program list (S34). Next, the composite image is sent to the image processing circuit 206 and output to the display device 208 (S35). Similarly, a channel notification sound is sent to the sound processing circuit 207, and the sound output device 2
09 (S36).

If the hit program list is empty, the output information material data holding unit 217 sends the hit program list shown in FIG.
The refusal image and refusal sound data as shown in (b) are acquired (S37). Next, an image is generated by combining the refusal image and the search key character string (S38). Next, the composite image is sent to the image processing circuit 206, and the display device 208
(S39). Similarly, the rejection voice is sent to the voice processing circuit 207 and output to the voice output device 209 (S40).

As described above, in the digital broadcast program receiving apparatus, by performing the above-described processing, the viewer can simply input a character string as a search key, and the channel on which the program of the desired content is being broadcast is displayed. Can be easily grasped, so that a desired program can be easily selected and viewed.

FIG. 6 shows the configuration of a digital broadcast program recording / reproducing apparatus 301 used in the digital broadcast system according to the present invention. Note that the receiving section has the same configuration as the main receiving section MR of the apparatus shown in FIG. 2, and a description thereof will be omitted here.

This device 301 is a program information storage device 30
2 and a material storage device 303. Program information storage device 3
02 stores program information decoded by the receiving unit, and the material storage device 303 stores each material of character information, moving image information, still image information, and audio information decoded by the receiving unit. And a hard disk drive. Here, it is particularly assumed that the character information storage unit 3031 is formed inside the material storage device 303.

The program information storage device 302 receives a program selection command from a user (viewer) through the program selection accepting unit 304, reads out the program information of the corresponding program, and sends it to the program information processing circuit 305. The program information processing circuit 305, based on the input program information,
03 to the image processing circuit 306 and the audio processing circuit 307.
The reproduction instruction of each program material read from the program 03 is performed. The image processing circuit 306 performs drawing / reproduction processing in accordance with an instruction from the program information processing circuit 305 so that the designated program material is arranged in the designated position and in a vertical relationship.
08 on the screen. Similarly, the audio processing circuit 3
07, according to an instruction from the program data processing circuit 305,
Audio reproduction processing is performed so that the specified program material is reproduced at the specified volume (volume), and sound is output from an audio output device (such as a speaker) 309.

The apparatus 301 further includes a stored program information generator 310, a search key acceptor 311, a character information searcher 312, a program searcher 313, an output information generator 314, and an output information material data holding unit 315.

The stored program information generator 310 receives all program information from the program information storage device 302 in response to a program guide request from the user, creates a stored program guide image in a predetermined format, Display device 308
To be displayed.

The search key accepting unit 311 is for inputting a character string serving as a search key from the user, and the input information is sent to the character information searching unit 312. This character information searcher 3
Reference numeral 12 denotes a material storage device 303 for the input character string.
The character information storage unit 3031 is searched for, and the search result is sent to the program search unit 313. The program searcher 313 selects, from the program information storage device 302, program information of a program including the character information searched by the character information searcher 312, and the result is sent to the output information generator 314.

The output information generator 314 creates an image and a sound indicating a search result from the program information storage device 302 using material data registered in the output information material data holding unit 315 in advance. The created image is displayed on the display device 308 via the image processing circuit 306,
The sound is output through a sound processing circuit 307 to a sound output device 309.
Sound is reproduced from.

In the digital broadcast program recording / reproducing apparatus 301 having the above-described configuration, the stored program information generator 310 is configured as shown in FIG.
Is performed. First, all the stored program IDs and titles are acquired from the program information storage device 302 (S41). As shown in FIG. 8, the program information storage device 302 is a database including a set of a program ID and a title, and it is assumed that only one program information data is held for each program ID.

From the program ID and the title acquired from the program information storage device 302, a stored program information guide image as shown in the example of FIG. 9 is created (S42) and sent to the image processing circuit 306 (S43). The image processing circuit 306 displays the stored program information guide image on the display device 308, so that the viewer can know the stored program.

The viewer's selection of a program is performed by the program selection receiving unit 30.
4, the program information is notified to the program information storage device 302 as the program ID, and the program information data corresponding to the notified program ID is instructed to be transmitted to the program information processing circuit 305. The program information processing circuit 305 analyzes the program information data and extracts a program material having a program material ID appearing in the program information data into the image processing circuit 306 and the audio processing circuit 307.
To the material storage device 303, and also instructs the image processing circuit 306 and the audio processing circuit 307 to reproduce each program material.

In accordance with an instruction from the program information processing circuit 305, the image processing circuit 306 arranges the designated program material in a designated position and in a vertical relationship, performs a drawing / reproducing process, and displays it on the display device 308 on the screen. I do. Similarly, the audio processing circuit 307 performs reproduction processing of the specified program material at the specified volume (volume) according to the instruction of the program information processing circuit 305, and outputs the same from the audio output device 309.

In the above apparatus, the viewer can select an interesting program from all the stored programs. As an example, a case will be described in which a viewer wants to view a program in which a singer “Yamada Yoko” appears, and selects and reproduces the program from among stored programs.

First, the character information searcher performs the processing shown in FIG. First, a search key is received from the search key accepting unit 311 as a character string (S51). Next, the work list is emptied (hereinafter, the work list is referred to as a "hit material list") (S52). Next, the material storage device 312
One material ID is selected from the above (S53).

Here, as shown in FIG. 11, the material storage device 312 is a database composed of a set of material ID and material type, and only one material file corresponds to each material ID. For example, if the material type is text,
The material file is a text file, and when the material type is a moving image, the material file is a moving image file.

Subsequently, it is determined whether or not the material type of the material ID selected from the material storage device in the above processing is character (S5).
4) If it is a character, a full-text search is performed to determine whether or not the character string of the search key is included in the text file as the material file (S55). If the character string of the search key is included in the text file, the material ID is added to the hit material list (S56). Step S57
After performing the above search operation for all the material IDs in S58 and S58, the hit material list and the search key are sent to the program searcher 313 (S59).

The program search unit 313 performs the processing shown in FIG. First, a search key character string and a hit material list are received from the character information search unit 312 (S61). Next, the work lists “hit program list” and “hit program title list” are cleared (S62). Next, one material ID is extracted from the hit material list (S63). Next, it is checked whether or not the material ID is in a program used in the program (S65). Specifically, the program information storage device 3
02 is a unique program information data corresponding to each program ID as shown in FIG. Therefore, it is checked whether or not the material ID extracted from the hit material list in the above processing appears in the program information data.

If the material ID exists in the program information data, the program ID is added to the hit program list (S66),
The program title corresponding to the program ID is added to the hit program title list (S67). Step S
This is performed for all programs stored in the program information storage device 302 by 68 and S69. Further, similarly, after the above processing is performed for all the material IDs in the hit material list in steps S70 and S71, the hit program list, the hit program title list, and the search key are sent to the output information generator 314 (S72).

The output information generator 314 performs the processing shown in FIG. First, a character string of a hit program list, a hit program title list, and a search key is received from the program information search device 313 (S81). Here, it is determined whether the hit program list is empty, and if it is not empty, the program notification image and the program notification audio data as shown in the example of FIG. 14A are obtained from the output information material data holding unit 315. Do (S
83). Next, an image is generated by combining the program notification image, the search key character string, each element in the hit program list, and each element in the hit program title list (S84). Next, the composite image is sent to the image processing circuit 306, and the display device 30
8 (S85). Similarly, the program notification sound is sent to the sound processing circuit 307 and output to the sound output device 309 (S86). As a result, a list of program IDs corresponding to the character string of the search key and the program titles is displayed, and the user can view a desired program by designating the program ID.

If the hit program list is empty, the output information material data holding unit 315 reads the hit program list shown in FIG.
A refusal image and refusal sound data as shown in the example of (b) are acquired (S87). Next, an image is generated by combining the refusal image and the search key character string (S88). Next, the composite image is sent to the image processing circuit 306, and the display device 30
8 (S89). Similarly, the rejection voice is sent to the voice processing circuit 307 and output to the voice output device 309 (S90). This allows the user to know that there is no program corresponding to the search key character string in the stored programs.

Therefore, the digital broadcast program recording / reproducing apparatus having the above-described configuration can automatically determine a corresponding program according to a user's request, and can present a result of the determination to the user. Can be selected and played.

[0053]

As described above, according to the present invention, it is possible to provide a digital broadcast program receiving apparatus and a digital broadcast program recording / reproducing apparatus which allow a viewer to easily select and view a desired program.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a digital broadcast program transmission system used in a digital broadcast system according to the present invention.

FIG. 2 is a block diagram showing a configuration of an embodiment of a digital broadcast program receiving device according to the present invention.

FIG. 3 is a flowchart showing processing contents of the character information search device of the embodiment.

FIG. 4 is a flowchart showing processing contents of an output information generator according to the embodiment;

FIG. 5 is a diagram showing an example of a combined channel notification image and sound and a refusal notification combined image and sound generated by the output information generator.

FIG. 6 is a block diagram showing an embodiment of a digital broadcast program recording / playback apparatus according to the present invention.

FIG. 7 is an exemplary flowchart showing the processing contents of a stored program information generator according to the embodiment;

FIG. 8 is an exemplary view showing program information storage contents of the program information storage device of the embodiment.

FIG. 9 is an exemplary view showing an example of a stored program information guide image created in the embodiment.

FIG. 10 is an exemplary flowchart showing processing contents of the character information search device of the embodiment.

FIG. 11 is a view showing contents stored and held by the material storage device of the embodiment.

FIG. 12 is an exemplary flowchart showing the processing contents of the program search device of the embodiment.

FIG. 13 is a flowchart showing processing contents of the output information generator according to the embodiment;

FIG. 14 is a diagram showing an example of a combined program notification image and audio and a refusal notification combined image and audio generated by the output information generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 ... Digital broadcast program transmission system 102 ... Material input device 103 ... Program data storage device 104 ... Program production device 105 ... Program transmission device 106 ... Encoder 107 ... Multiplexing device 108 ... Transmission device 201 ... Digital broadcast program reception device 202 ... Reception Circuits 2031 to 2035 Decoder 2041 Program information buffer 2042 Character information buffer 2043 Video information buffer 2044 Still image information buffer 2045 Audio information buffer 205 Program information processing circuit 206 Image processing circuit 207 Audio processing circuit 208 Display device (CRT) 209 Audio output device 2101 to 210n Character information acquisition circuit 211 Receiving circuit 212 Decoder 213 Character information buffer 214 Character information searcher 215 Search key acceptor 216 Output information generation 217: Output information material data holding unit 301: Digital broadcast program recording / reproducing device 302: Program information storage device 303: Material storage device 304: Program selection acceptor 305: Program information processing circuit 306 ... Image processing circuit 307 ... Audio processing circuit 308 ... display device (CRT) 309 ... audio output device 310 ... stored program information generator 311 ... search key acceptor 312 ... character information searcher 313 ... program searcher 314 ... output information generator 315 ... output information material data holding unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tsutomu Owawa 70, Yanagicho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Yanagicho Plant (72) Inventor Shigeru Tashiro 1-1-1, Shibaura, Minato-ku, Tokyo Toshiba Corporation F term in the head office (reference) 5C025 AA23 AA28 AA29 CA09 CB05 CB07 DA01 DA05

Claims (6)

[Claims] 1. A digital broadcast program receiving apparatus for receiving program data obtained by combining program material data including character information based on program information, receives program data of a specified channel and separates the program information and the material data. After that, the main receiving unit that decodes and temporarily retains each, and receives the program data of a channel other than the receiving channel of the main receiving unit, separates the character information, and then decodes and temporarily stores And a character information search for identifying a channel including the detected character information by searching a character string input as a search key from character information held in the main reception unit and the sub reception unit. Means, and a character string search result and a channel identification result obtained by this means are presented by at least one of an image and a sound. And a search result presenting means. 2. The search result presenting means, when there is a character string of a search key in the character information search means, generates an image or a sound indicating the character string of the search key and a channel in which the character string is found. 2. The digital broadcast program receiving apparatus according to claim 1, wherein the digital broadcast program receiving apparatus is combined with an image or audio material indicating the guide information and output. 3. The search result presenting means further generates an image or sound of the character string of the search key when the character information search means does not find the character string of the search key, and determines that there is no corresponding channel. 3. The digital broadcast program receiving device according to claim 2, wherein the digital broadcast program receiving device synthesizes and outputs the image or audio material indicating the image. 4. A digital broadcast program recording and reproducing apparatus for storing program data obtained by combining program material data including character information based on program information on a recording medium and reproducing arbitrary program data. A program information storage unit that stores only information; a material storage unit that stores only program material data of the program data; and a character string input as a search key among character information stored in the material storage unit. A character information search means for searching from the program information stored in the program information storage unit for a program having the character information searched by the means; A program information search means for identifying, and a character string search result, a program selection number, and a program title obtained by this means. Digital broadcasting is characterized by comprising a search result presentation unit which presents the one program recording and reproducing apparatus. 5. The search result presenting means, when there is a character string of a search key in the character information search means, a character string of the search key, a program selection number and a program title identified by the program information search means. Generate an image or sound that indicates
5. The digital broadcast program recording / reproducing apparatus according to claim 4, wherein the digital broadcast program recording / reproducing apparatus is combined with an image or audio material indicating guide information and output. 6. The search result presenting means further generates an image or sound of the character string of the search key when the character string of the search key is not found by the character information search means, and there is no corresponding program. 6. The digital broadcast program recording / reproducing apparatus according to claim 5, wherein the digital broadcast program recording / reproducing apparatus synthesizes and outputs the image or audio material indicating the following.