JPH08228180A - Method and equipment for receiving information - Google Patents

Abstract

PURPOSE: To simultaneously receive and record the plural pieces of information in multiplexed information. CONSTITUTION: When the transmission of the plural pieces of the information is requested from a terminal 2 through a public line network 4, a center 1 transmits the multiplexed information for which the plural pieces of the information for which the transmission is requested are multiplexed through a broadcasting satellite 3 based on a transmission request from the terminal 2. At the time, when the plural pieces of the information are multiplexed overlapping at the same time, the terminal 2 demultiplexes the prescribed one of the plural pieces of the information for which the transmission is previously requested from the received multiplexed information, records it, also tentatively records the multiplexed information as it is and then, demultiplexes the other prescribed one of the plural pieces of the information for which the transmission is requested.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information receiving method and apparatus, and more particularly, to an information receiving method and apparatus suitable for use in the case of providing music information and the like by broadcasting media such as satellites.

[0002]

2. Description of the Related Art Conventionally, as a method for a person to obtain desired music, one has to go to a record store and purchase a storage medium such as a CD (compact disc) or an MD (mini disc) and watch it. Alternatively, a method of viewing a broadcast medium such as an FM broadcast or a cable broadcast, or recording desired music from the broadcast media, and viewing the music may be considered.

However, there are cases where it is difficult to reliably obtain the desired record at a predetermined time because the desired record is sold out or the desired music is not broadcast easily.

From this, B-ISDN (Broadband)
As one of the applications in a high-speed communication network represented by Integrated Services Digital Network), video-on-demand (hereinafter referred to as "video-on-demand") that enables viewing of video / music information stored in a predetermined center via this communication network. , VOD) services are currently under consideration.

An information providing system applicable to a music providing service for providing music by broadcasting media such as satellites has been considered. This is because when the terminal side makes a transmission request for predetermined information to the center that is the transmission side, the center side creates a transmission schedule for that information, and based on this, that information is transmitted via the satellite at a predetermined time. It is a system that is sent to the terminal side.

According to this system, the user can obtain desired music while staying at home.
Moreover, the center can be realized at low cost and the transmission cost for information transmission can be kept low, even compared with future information providing systems that are premised on the existence of a high-speed information communication network represented by VOD services. There is an advantage that it can be done.

[0007]

However, when a user requests transmission of a plurality of pieces of music at the same time, when the plurality of pieces of music have already been requested to be transmitted by another user and are set in the transmission schedule of the center, Those music are
It may be time-division multiplexed and transmitted. In that case, since only one of the time-division-multiplexed music can be recorded on the user terminal,
Scheduling may be performed again at the center. Therefore, there is a problem that the waiting time of the user may be long.

Further, in the center, a plurality of the same music are incorporated in the schedule. As a result, there is a problem that the schedule becomes long, the transmission cost of information transmission rises, and the waiting time of the user increases.

The present invention has been made in view of such a situation, and by recording the multiplex information in which a plurality of pieces of information are multiplexed as it is, even when a plurality of pieces of information are simultaneously transmitted, those pieces of information are transmitted. It ensures that the information can be received.

[0010]

According to a first aspect of the present invention, there is provided an information receiving method for receiving and recording multiplexed information obtained by multiplexing a plurality of pieces of information transmitted from a center. When a predetermined one of the separated information is recorded, a predetermined one of the separated information is recorded, and an operation for recording the predetermined one of the information is performed, when another predetermined one of the information is recorded, The multiple information is recorded as it is, and other predetermined information is separated from the recorded multiple information.

An information receiving apparatus according to a second aspect of the invention is an information receiving apparatus for receiving and recording multiplexed information in which a plurality of information transmitted from a center are multiplexed, and separating the predetermined information from the multiplexed information. First separating means, first recording means for recording a predetermined information separated by the first separating means, second recording means for directly recording the multiplex information, and multiplex recording for the second recording means. Second separation means for separating other predetermined information from the information is provided.

Further, the second recording means, when the first recording means is performing an operation for recording a predetermined one of the information, when recording another predetermined one of the information, the multiplex information is kept as it is. It can be recorded.

When the first recording means can record the predetermined information, other predetermined information is separated from the multiplex information recorded in the second recording means by the separating means and then separated by the separating means. Other predetermined information may be recorded by the first recording means.

In the multiplex information recorded in the second recording means, other predetermined information of the multiplex information is separated by the separating means, recorded in the first recording means, and then erased. can do.

The multiplex information may be time-division multiplex information.

Further, the information can be information having a temporal element such as music and moving images.

The second recording means may be a hard disk.

The second recording means may be a magneto-optical disk.

The first recording means may be a music recording medium.

The first recording means may be a moving picture recording medium.

[0021]

In the information receiving method or apparatus according to the present invention, the other information in the multiplex information is recorded while the predetermined information is separated and recorded from the received multiplex information. In this case, the multiplex information is once recorded as it is. Then, other information is separated from the recorded multiplex information. Therefore, even when a plurality of desired pieces of information are multiplexed so as to overlap with each other in time, all the pieces of information can be recorded.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of an embodiment of a music providing system to which the information receiving method and device of the present invention are applied. In FIG. 1, a center 1 stores music information, and a terminal 2 is installed in each home. Predetermined information can be transmitted from the center 1 to the terminal 2 by the broadcasting satellite 3, and information can be transmitted bidirectionally between the center 1 and the terminal 2 by the public line network 4. Has become.

FIG. 2 is a block diagram showing a configuration example of the center 1 of FIG. As shown in FIG. 2, the center 1 requests a music storage unit 11 that stores music to be serviced, an information compression unit 12 that compresses information for more efficient transmission of music information, and music information. A scramble processing unit 13 that provides only to the terminal 2 and scrambles to prevent viewing on any terminal 2, a multiplexing processing unit 14 for time division multiplexing a plurality of music information, and a plurality of music storage devices The music storage device control unit 15 for controlling the stored music storage unit 11, the scrambler control unit 16 for controlling the scramble processing unit 13 including a plurality of scramblers, and the CPU 17 for executing the control program. ing.

The center 1 further includes a RAM 18 for storing a transmission schedule based on a request from the terminal 2, a scramble key and billing information for each terminal 2, a ROM 19 for storing a control program and terminal information, and a public line network 4. A modem 20 for exchanging information with the terminal 2, a system bus 21 of the CPU 17 including a data bus, an address bus, a control bus, etc., music information output from the multiplexing processing unit 14, and a satellite broadcast image. A modulation processing unit 23 that multiplexes and modulates voice information, an antenna 25 that transmits an output signal from the modulation processing unit 23, and a timer 24 that includes a clock and can notify the current time are provided.

The music storage unit 11 is composed of 16 CD changers 101 to 116 (however, some are not shown), and its output is 1 of the information compression unit 12.
Six MPEG / Audio encoders 201 to 21
6 (however, some are not shown). By passing through this information compression unit 12,
A 16-bit, 44.1 kHz sampling, stereo 1.4 Mbps audio signal is compressed to 128 kbps. The output of the information compression unit 12 is input to each of the 16 scramblers 301 to 316 (however, some are not shown) of the scramble processing unit 13,
Encryption processing is performed.

The output of the scramble processing unit 13 is subjected to time division multiplexing processing in the multiplexing processing unit 14 to obtain 128 kb.
The 16 ps audio signals are combined into one 2 Mbps signal. The output of the multiplexing processor 14 is the modulation processor 2
3, is multiplexed with a normal video / audio signal, modulated, and sent to the broadcasting satellite 3 through the antenna 25. Then, the broadcasting satellite 3 transmits the predetermined signal transmitted via the antenna 25 to the terminal 2.

In the case of this example, assuming that the average time of music served is 5 minutes, 4608 will be calculated in 24 hours.
It is possible to transmit songs. This is the music storage unit 1
If the music stored in 1 is 4608, it means that the user can obtain the desired music after 24 hours at worst. The number of 4,600 songs corresponds to the number of songs provided in a general karaoke box, and can be said to be a number that can sufficiently satisfy users who subscribe to the service.

FIG. 3 is a block diagram showing a configuration example of the terminal 2 of FIG. The terminal 2 has an antenna 31 for receiving a satellite broadcast from the broadcasting satellite 3, a tuner 32 for demodulating a signal corresponding to a predetermined channel from the received signal and further extracting only a digital signal, and a plurality of music information multiplexed. A multiplexed signal demultiplexing unit 33 (first demultiplexing unit, second demultiplexing unit) for extracting only target music information from the signal, and a descrambler 3 for returning the scrambled signal to the original.
4, a compressed signal decoding unit 35 for restoring the information-compressed signal to the original music, a music recording device 36 (first recording means) for recording the decompressed music, and for controlling the music recording device 36 A music recording device controller 37 is provided.

The terminal 2 further includes a CPU 38 for executing a control program, a transmission start time and a transmission end time of requested information, and a RAM for storing a descramble key.
39, a ROM 40 for storing a control program, a modem 41 for exchanging information with the center 1 via the public network 4, a system bus 42 of a CPU 38 including a data bus, an address bus, a control bus, a user An input unit 43 for requesting information from the terminal 2, a display unit 44 for notifying the user of information from the center 1 and the state of the terminal 2, and music recorded in the music recording device 36 by the user. A timer 46 capable of notifying the present time and a 2 Mbps signal output from the tuner 32 are temporarily recorded as they are, with a built-in music reproducing unit 45 including an amplifier and a speaker for listening and listening, and a clock. A temporary recording device 47 (second recording means) is provided for this purpose.

The signal corresponding to the radio wave of the satellite broadcast received by the antenna 31 is sent to the tuner 32, and the signal of the target frequency is demodulated. Further, the video and audio signals are separated and a 2 Mbps digital signal is extracted. This signal is input to the multiplexed signal demultiplexing unit 33, and one channel of 16 time-division multiplexed signals of 128 kbps is demultiplexed. The output of the multiplex signal separation unit 33 is input to the descrambler 34, and the encrypted information is restored.

The output of the descrambler 34 is input to the compressed signal decoding unit 35, and the signal compressed to 128 kbps is restored to the original 16-bit, 44.1 kHz sampling, stereo 1.4 Mbps digital audio signal. The output of the compressed signal decoding unit 35 is input to the music recording device 36 and recorded on an MD (mini disc). Therefore,
The user can freely listen to the music information recorded in the music recording device 36 through the music reproducing unit 45.

Further, the digital signal output from the tuner 32 is temporarily stored in the temporary recording device 47, and thereafter,
The signals accumulated in the temporary recording device 47 are added to the multiplex signal separation unit 3
It is also possible to transmit to the No. 3 and perform the same processing as the above-mentioned case.

Next, with reference to the flow chart shown in FIG. 4, a procedure in the case where the terminal 2 makes a transmission request of desired music to the center 1 will be described. First, when the user inputs the music name of the desired music to the terminal 2 via the input unit 43, the CPU 38 controls the modem 41 to connect the modem 20 in the center 1 to the line in step S101, and the desired music is input. ID and R corresponding to the music name of each music
The terminal ID peculiar to the terminal stored in the OM 40 is transmitted to the center 1, and a transmission request for music corresponding to the music ID is made.

When the center 1 receives the transmission request from the terminal 2, the CPU 17 in the center 1 searches the current transmission schedule stored in the RAM 18 in step S102, and the music requested by the terminal 2 is retrieved. It is determined whether the music corresponding to the ID is already set in the transmission schedule.

If it is determined that the music ID is not included in the schedule, the process proceeds to step S103 and C
The music requested by the terminal 2 is sent to the RAM 1 by the PU 17.
It is newly added to the schedule in 8.

Next, in step S104, the CPU 1
7, a scramble key for encrypting and transmitting the newly scheduled music is created, which is also stored in the RAM 18, and the process proceeds to step S105.

In step S105, the CPU 17
As a result, the terminal information in the ROM 19 is searched, and the terminal unique key is searched from the terminal ID sent from the terminal 2.

Next, in step S106, the CPU 1
7, the scramble key for encrypting the music is encrypted based on the terminal unique key retrieved in step S105, and the encrypted encrypted scramble key is created.

Next, in step S107, the CPU 1
7 transmits to the terminal 2 via the modem 20, the schedule information such as the channel on which the music is multiplexed, the transmission start time and the transmission end time, and the encrypted scramble key. The terminal 2 receives the schedule information and the encrypted scramble key via the modem 41 and supplies them to the CPU 38. Then, the CPU 38 sends the schedule information and the encrypted scramble key supplied from the modem 41 to the RAM 3
Supply to 9. The RAM 39 stores this schedule information as a reception schedule and also stores an encrypted scramble key.

On the other hand, in step S102, the CPU
When it is determined by 17 that the music information requested by the terminal 2 is already included in the transmission schedule,
It is not necessary to set a new schedule, and since the scramble key for the music information should have already been created when the transmission schedule is set, the process proceeds to step S111, and the CPU 17 deletes the scramble key from the RAM 18. Search for. After that, similarly to the above-mentioned procedure, the process proceeds to step S105.

The user can request the center 1 for a plurality of music by executing the above procedure only a plurality of times.

FIG. 5 shows an example of the transmission schedule created by the above procedure. Thus, channels 1 to 1
The transmission schedule of each music in each of 6 is stored. Further, since the length of one music piece varies depending on the piece of music, the transmission start time and the transmission end time of the music on each channel are varied as shown in FIG. Here, as an example, it is assumed that the song requested by the user is incorporated in the schedule as shown by music 1-1 and music 2-2 in FIG. This schedule may be considered to be previously incorporated into the schedule in step S102 of FIG. 4, or may be considered to be a schedule newly set up by this user.

Next, the procedure for transmitting music in the center 1 will be described with reference to the flowchart shown in FIG. In step S201, the CPU 17 acquires the current time from the timer 24, and then the step S202
Then, it is determined whether or not the current time has reached the music transmission start time of the transmission schedule stored in the RAM 18. As a result, when it is determined that the current time has not yet reached the transmission start time, step S20 is performed again.
Returning to step 1, the processes of step S201 and step S202 are repeatedly executed.

On the other hand, if it is determined in step S202 that the current time has reached the transmission start time of music 1-2 in FIG. 5, the process proceeds to step S203 and the CP
The U17 retrieves the scramble key created for the music from the RAM 18, and, via the scrambler control unit 16, the scrambler corresponding to the channel 1 in the scramble processing unit 13, in this case, the scrambler 301, the scramble key. Then, the scrambler 301 is operated.

Next, in step S204, the CPU 1
Reference numeral 7 instructs the CD changer of the music storage unit 11 (CD changer 101 corresponding to channel 1 in this case) to play back the music via the music storage device control unit 15.
The CD changer 101 starts playing.

Thus, as described above, the music is
The signal is converted into a corresponding signal through the music storage unit 11, the information compression unit 12, the scramble processing unit 13, the multiplexing processing unit 14, and the modulation processing unit 23, and then transmitted to the broadcasting satellite 3 by radio waves by the antenna 25. To be done.

Next, in step S205, the CPU 1
7, the current time is acquired from the timer 24, the process proceeds to step S206, and it is determined whether or not the current time has reached the transmission end time of the music currently being reproduced stored in the RAM 18. When it is determined in step S206 that the current time has not yet reached the transmission end time, the process returns to step S205 again, and the processes of steps S205 and S206 are repeatedly executed.

On the other hand, when it is determined in step S206 that the current time has reached the transmission end time, the process proceeds to step S207, and the CPU 17 causes the system bus 21
Via, the music storage device controller 15 is instructed to stop the reproduction of the music. The music storage device controller 15
According to a command from the CPU 17, the CD changer of the music storage unit 11 (in this case, the CD changer 101).
To stop playing the music. The CD changer 101 stops the reproduction of the music based on a command from the music storage device controller 15.

Next, in step S208, the CPU 1
7 deletes the schedule information of the music whose transmission has ended from the transmission schedule stored in the RAM 18. Since the CPU 17 can execute the processes described above with reference to the flowchart of FIG. 6 in parallel,
As shown in, it is possible to transmit a plurality of pieces of music information.

Next, a music receiving procedure in the terminal 2 will be described with reference to the flowchart shown in FIG. Here, a case where the music 1-2 shown in FIG. 5 is received and recorded will be described. First, step S301
At 38, the CPU 38 obtains the current time from the timer 46, the process proceeds to step S302, and the current time is the transmission start time of the music stored in the RAM 39 as the reception schedule, in this case, the music 1 for which the transmission request is made.
It is determined whether or not the time 8:00, which is the transmission start time of -2, has been reached. When it is determined that the current time has not reached the transmission start time, the process returns to step S301, and the processes of step S301 and step S302 are repeatedly executed.

On the other hand, when it is determined in step S302 that the current time has reached the transmission start time (8:00), the process proceeds to step S303, in which the CPU 38 causes the music recording device control section 37 to execute. Music recording device 3
It is determined whether 6 is in operation. At this point,
Since the music recording device 36 is not in operation, step S3
Proceeding to 04, the CPU 38 commands the multiplex signal separating unit 33 to output only the first channel from the 2 Mbps time division multiplex signal.

Next, in step S305, the CPU 3
8 retrieves from the RAM 39 the encrypted scramble key for the music received from the center 1 via the public line network 4, further retrieves the terminal unique key stored in the ROM 40 in advance, and extracts these two keys from the descrambler 34. To operate the descrambler 34.

Next, in step S306, the CPU 3
8 indicates to the music recording device control section 37 that the music recording device 3
Command 6 to start recording. According to the instruction from the CPU 38, the music recording device control unit 37 instructs the music recording device 36 to record the 16-bit, 44.1 kHz sampling, stereo audio signal supplied from the compression signal decoding unit 35. Music recording device 36
Starts recording based on a command from the music recording device controller 37.

As a result, the multiplex signal separation unit 33 separates the 128 kbps signal corresponding to channel 1 from the 2 Mbps time division multiplex signal supplied thereto,
It is supplied to the descrambler 34. The descrambler 34 descrambles the signal corresponding to the channel 1 supplied from the multiplex signal demultiplexing unit 33 based on the encrypted scramble key supplied from the CPU 38 and the terminal unique key, and descrambles the signal. The processed signal is supplied to the compressed signal decoding unit 35. Then, the compressed signal decoding unit 35 restores the signal supplied thereto to the original signal and then supplies the signal to the music recording device 36 for recording.

In this way, the predetermined music requested to be transmitted includes the antenna 31, the tuner 32, and the multiplex signal separation unit 3.
3, the descrambler 34, and the compressed signal decoding unit 35, and is supplied to the music recording device 36 and recorded there.
Accumulated.

Next, in step S307, the CPU 3
8, the current time is acquired from the timer 46, the process proceeds to step S308, and the current time is the transmission end time of the currently recorded music in the reception schedule stored in the RAM 39, in this case, music 1-2. It is determined whether or not the transmission end time of 8:05 has been reached. When it is determined that the current time has not yet reached the transmission end time, the process returns to step S307, and the processes of steps S307 and S308 are repeatedly executed.

On the other hand, when it is determined in step S308 that the current time has reached the transmission end time, the process proceeds to step S309, and the CPU 38 causes the music recording device control unit 37 to notify the music recording device 36 of this. Command to instruct to stop recording music. The music recording device controller 37 instructs the music recording device 36 to stop the recording of this music according to the instruction from the CPU 38.
The music recording device 36 stops the recording of this music according to a command from the music recording device controller 37.

Next, in step S310, the CPU 3
Reference numeral 8 deletes the schedule information of the music for which recording is completed from the reception schedule stored in the RAM 39.

Next, the receiving procedure for receiving the music 2-2 shown in FIG. 5 will be described with reference to the flowchart of FIG. First, in step S501, C
The PU 38 acquires the current time from the timer 46, the process proceeds to step S502, and the current time is stored in the RAM 3
It is determined whether or not the transmission start time of the music 2-2 in the reception schedule recorded in 9 (time 8: 1 in this case) has been reached. As a result, when it is determined that the current time has not yet reached the transmission start time, the process returns to step S501 again, and steps S501 and S502.
The process of is repeatedly executed.

On the other hand, when it is determined in step S502 that the current time has reached the transmission start time of music 2-2, the process proceeds to step S503, and the CPU 38 causes
Through the music recording device controller 37, it is determined whether or not the music recording device 36 is in operation. At this point, the music recording device 36 is recording the music 1-2, so it is determined that the music recording device 36 is in operation, and step S50 is performed.
Go to 4.

In step S504, the CPU 38
Instructs the temporary recording device 47 to record the output signal of the tuner 32. The temporary recording device 47 is a CP
Recording of an output signal from the tuner 32 is started in accordance with a command from U38.

Next, in step S505, the CPU
38, the current time is acquired from the timer 46, and the process proceeds to step S506, where the current time is the transmission end time of the music currently being recorded in the reception schedule recorded in the RAM 39 (in this case, the music of FIG. It is determined whether the transmission end time of 2-2 (time 8: 6) has been reached. As a result, if it is determined that the current time has not yet reached the transmission end time, the process returns to step S505 again, and the processes of steps S505 and S506 are repeatedly executed.

On the other hand, when it is determined in step S506 that the current time has reached the transmission end time (8:06), the process proceeds to step S507, and the CPU 38
The temporary recording device 47 is instructed to stop the recording operation.
The temporary recording device 47 stops the recording operation according to the instruction from the CPU 38.

As a result, the information of the music 2-2 is recorded in the temporary recording device 47 via the antenna 31 and the tuner 32. Further, since the temporary recording device 47 records the information from the tuner 32 in a multiplexed state, in addition to the music 2-2, the music 1 multiplexed between the time 8:01 and the time 8:06 is recorded. -2, music 1-3, music 3-2, music 4
-2, a part of music 4-3 etc. is recorded simultaneously.

Next, in step S508, the CPU
38 deletes the schedule information of the music (music 2-2) that has been temporarily recorded by the temporary recording device 47 from the reception schedule stored in the RAM 39. Then, the CPU 38 records in the RAM 39 the information that the music 2-2 has been recorded in the temporary recording device 47 and has not been recorded in the music recording device 36 yet.

Next, in step S509, the CPU 3
8, it is determined via the music recording device control section 37 whether or not the music recording device 36 is in operation. In the case of this example, since the recording operation of the music 1-2 ends at 8:05, it is determined that the music recording device 36 is not in operation, and the process immediately proceeds to the next step S510. , When the music 1-3 following the music 1-2 is also recorded, the music recording device 36 is still in operation,
It waits until the operation of the music recording device 36 stops.

In step S510, the CPU 38
Is supplied to the multiplex signal demultiplexer 33.
It is instructed to output only the signal corresponding to the second channel from the time division multiplexed signals of Mbps.

Next, in step S511, the CPU
By 38, the encrypted scramble key received and stored for the music from the RAM 39 is retrieved, while RO
From M40, the terminal unique key stored in advance therein is taken out, and these two keys are supplied to the descrambler 34. The descrambler 34 operates to descramble the signal supplied thereto based on the encryption scramble key and the terminal unique key.

Next, in step S512, the CPU
38 commands the temporary recording device 47 to reproduce the previously recorded multiplex information. Next, the CPU 38 commands the music recording device 36 via the music recording device control unit 37 to start recording.

As a result, first, the temporary recording device 47
The reproduction of the multiple information recorded there is started, and the music 2-2
The multiplex information including is supplied to the multiplex signal separation unit 33.
Then, in the multiplex signal separation unit 33, only the signal of channel 2 corresponding to the music 2-2 is separated and supplied to the descrambler 34. The signal supplied to the descrambler 34 is descrambled based on the encryption scramble key and the terminal unique key, and is supplied to the compressed signal decoding unit 35. The signal supplied to the compressed signal decoding unit 34 is then decoded into the original signal, supplied to the music recording device 36, and recorded and accumulated.

In this way, even when a plurality of pieces of information are multiplexed and transmitted so as to overlap in time, it is possible to record all of these pieces of information. Therefore, in the center 1, it is not necessary to duplicately incorporate a plurality of information into the transmission schedule, and the waiting time for the user can be shortened. Moreover, since the transmission schedule can be shortened, the transmission cost can be reduced.

Although a method of receiving and recording two pieces of information multiplexed at the same time has been described here, three or more pieces of information multiplexed at the same time are received,
Also in the case of recording, it can be realized by applying a method basically similar to the case described above. That is, even when receiving three or more pieces of multiplexed information, it is possible to perform processing with the same hardware as when receiving two pieces of multiplexed information as described above.
The cost of the terminal can be reduced.

Next, of the above-described music transmission request, music transmission, and music reception procedures, a scramble descrambling procedure for encrypting and transmitting and receiving music will be described with reference to the flowchart of FIG. explain.

In the ROM 40 of the terminal 2, the terminal ID and the terminal unique key unique to the terminal are written in advance.
Manages all terminal IDs and terminal unique keys in association with each other.

In step S 401, the signal corresponding to the transmission request of the predetermined music and the signal corresponding to the terminal ID are transmitted from the terminal 2 to the center 1 via the public line network 4. Next, in step S402, the center 1 searches for a terminal unique key corresponding to the terminal ID of the terminal 2 received via the public line network 4.

Then, in step S403, a scramble key for the predetermined music requested to be transmitted in step S401 is determined (search is performed if already determined). Next, in step S404, the scramble key is encrypted with the terminal unique key to generate an encrypted scramble key, and in step S405, this encrypted scramble key is transmitted to the terminal 2 via the public line network 4.

When the actual music is transmitted, step S40
In step 6, after the music to be transmitted is scrambled by the scramble key to be encrypted music, step S
At 407, the broadcast wave is broadcast to the terminal 2 via the broadcast satellite 3. When the terminal 2 receives the encrypted music transmitted by the broadcast wave, it decrypts the encrypted scramble key with the terminal unique key in step S408 to generate a descramble key, and receives the descramble key in step S409. The encrypted music is descrambled and extracted as actual music.

In the above embodiment, the case where the music information is transmitted from the center and the terminal receives the music information has been described. However, software such as a moving picture or game software is transmitted and received. Is also possible.

Further, in the above embodiment, the information is transmitted from the center to the terminal by using the broadcasting satellite, but it is also possible to use the terrestrial broadcasting.

[0080]

According to the information receiving method or apparatus of the first or second aspect, while the predetermined information is separated and recorded from the received multiple information, other information in the multiple information is recorded. In the case of recording, since the multiplex information is once recorded as it is and the other information is separated, it is possible to record the multiplex information even when the multiple information is time-multiplexed and multiplexed. . Therefore, regardless of the number of desired pieces of information, it is possible to make the waiting time until the pieces of information are similar. In addition, the efficiency of information transmission can be improved, and an increase in information transmission cost can be suppressed. Furthermore, since the multiplex information is recorded as it is, the same hardware can be used for processing regardless of the number of information, and the cost of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a music providing system to which an information receiving method and device of the present invention are applied.

FIG. 2 is a block diagram showing a configuration example of a center 1 of FIG.

3 is a block diagram showing a configuration example of a terminal 2 of FIG.

FIG. 4 is a flowchart showing a procedure for requesting transmission of predetermined music from the terminal 2 to the center 1.

FIG. 5 is a diagram showing an example of a transmission schedule.

FIG. 6 is a flowchart showing a procedure of transmitting music by the center 1.

FIG. 7 is a flowchart showing a procedure for receiving music by the terminal 2.

FIG. 8 is a flowchart showing a procedure for receiving music by the terminal 2.

FIG. 9 is a diagram showing a procedure of scrambling information in the center 1 and descrambling information in the terminal 2.

[Explanation of symbols]

1 center 2 terminal 3 broadcasting satellite 4 public line network 11 music storage unit 12 information compression unit 13 scramble processing unit 14 multiplexing processing unit 15 music storage device control unit 16 scrambler control unit 17 CPU 18 RAM 19 ROM 20 modem 21 system bus 23 Modulation Processing Section 24 Timer 25 Antenna 31 Antenna 32 Tuner 33 Multiplexed Signal Separation Section (First Separation Means, Second Separation Means) 34 Descrambler 35 Compressed Signal Decoding Section 36 Music Recording Device (First Recording Means) 37 Music Recording Device Control unit 38 CPU 39 RAM 40 ROM 41 Modem 42 System bus 43 Input unit 44 Display unit 45 Music reproducing unit 46 Timer 47 Temporary recording device (second recording means) 101, 102, 103, 116 CD changer 201, 202, 203, 216 MPEG / A udi
o Encoder 301, 302, 303, 316 Scrambler

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Claims (11)

[Claims] 1. An information receiving method for receiving and recording multiplexed information in which a plurality of information transmitted from a center are multiplexed, wherein a predetermined one of said information is separated from said multiplexed information, and said separated information When a predetermined one of the information is recorded and an operation for recording the predetermined one of the information is performed, and when another predetermined one of the information is recorded, the multiplex information is directly recorded and recorded. An information receiving method, characterized in that other predetermined information is separated from the multiplex information. 2. An information receiving device for receiving and recording multiplexed information in which a plurality of pieces of information transmitted from a center are multiplexed, wherein a first part of the information is separated from the multiplexed information.
Separation means, first recording means for recording a predetermined one of the information separated by the first separation means, second recording means for directly recording the multiplex information, and the second recording means. An information receiving apparatus, comprising: second separating means for separating another predetermined one of the information from the multiplex information. 3. The second recording means, when the first recording means is performing an operation for recording a predetermined one of the information, when recording another predetermined one of the information, The information receiving apparatus according to claim 2, wherein the multiplex information is recorded as it is. 4. When the first recording means is capable of recording predetermined information, other predetermined information of the information is separated by the separating means from the multiplex information recorded in the second recording means, The information receiving apparatus according to claim 2, wherein another predetermined one of the information separated by the separating unit is recorded by the first recording unit. 5. The multiplex information recorded in the second recording means, after the other predetermined information of the multiplex information is separated by the separating means and recorded in the first recording means. The information receiving apparatus according to claim 4, wherein the information receiving apparatus is erased. 6. The information receiving apparatus according to claim 5, wherein the multiplex information is time-division multiplexed multiple pieces of information. 7. The information receiving apparatus according to claim 5, wherein the information is information having a temporal element such as music or a moving image. 8. The information receiving apparatus according to claim 5, wherein the second recording means is a hard disk. 9. The information receiving apparatus according to claim 5, wherein the second recording means is a magneto-optical disk. 10. The information receiving apparatus according to claim 5, wherein the first recording means is a music recording medium. 11. The information receiving apparatus according to claim 5, wherein the first recording means is a moving image recording medium.