JP2003006977A - Digital information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the movement of the recording information from a digital reproducing device to a general purpose analog recorder and to eliminate the disadvantage for a copyright holder. SOLUTION: The addition of an APS signal to an analog output signal is stopped when the information is moved to the analog recorder, and also the picture quality is made to the deteriorated state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus for reproducing digital information such as video and audio from a recording medium, and particularly outputting the reproduced information to another apparatus by the authority of the copyright holder. The present invention relates to a reproducing device which is intended to be restricted.

[0002]

2. Description of the Related Art In the field of television broadcasting, an apparatus for recording and reproducing the same, and a package medium such as movie software, digital broadcasting has started and a consumer digital recording / reproducing apparatus corresponding thereto has been put on the market. ing. Packaged software used in this device will appear in the near future. The advantage of digital broadcasting and digital recording devices is that there is little or no quality deterioration in the information transmission process or recording / reproduction process. However, when a large number of high quality copies of information are created and distributed in places where the copyright holder does not know, and when the copying is repeated, there is a problem that the profit is not returned to the copyright holder.

US Pat. No. 5,896,454,
A method of attaching 2-bit copy control information to information is disclosed. This is to control the operation of the recording apparatus by selecting any one of three, copy prohibition, copy authorization, and copy authorization for one generation only, depending on the will of the copyright holder and the information creator. The recording apparatus does not perform the recording operation if the copy is prohibited, but performs the recording operation if the copy is authorized. If copying is authorized for only one generation, the recording device rewrites the control information with information that does not allow further copying, and then performs the recording operation.

In the broadcast, if the copy control information is prohibited from being copied, there is a problem that the user has no means for viewing the broadcast when a visitor happens to come. Therefore, Japanese Patent Laid-Open No. 2000-149417 discloses a method of solving this problem by using a means of temporary recording even when the copy control information indicates copy prohibition. In this method, information is physically recorded once on a recording medium, but a period of 90 minutes or the like is set during the reproduction and viewing, and the information is erased after the reproduction or the time limit. That is, instead of storing it for a long time and recording it for multipurpose use, the broadcast is equivalently delayed for viewing within 90 minutes. Since the recording medium does not remain for a long time, the inconvenience of the user can be solved without giving a disadvantage to the copyright holder. In addition, due to its character, the temporary record is
This is often done using a hard disk recorder or the like built into the receiving device.

The same temporary recording is possible even when the copy control information indicates copy authorization for only one generation. For example, a limit of 90 minutes is set, and within the time limit, the copy control information on the recording medium is kept showing the copy authorization of only one generation, and after the time limit has passed, the information that does not allow further copying is changed. Rewrite. This can also substantially obtain the effect of delaying broadcasting by 90 minutes, for example.

After the information is rewritten so that it cannot be copied any more, it is impossible to copy the information from the disk to the tape, for example. This may be inconvenient for the user. Therefore, on the condition that the information on the original recording medium cannot be reproduced, an operation of "moving" to re-record on another recording medium is permitted. Since the number of recording media is not increased, it is possible to change the recording media without giving any disadvantage to the copyright holder.

[0007]

DISCLOSURE OF THE INVENTION The matters disclosed in the above-mentioned prior art are applicable to the case where digital information is recorded by an apparatus based on a digital recording system, or when copying between a plurality of digital recording or reproducing apparatuses. I am trying. However, it is considered that the analog recording device that has been widely used in the past will be used frequently in the future. It seems that there is a great need for, for example, "moving" the information once recorded or temporarily recorded in a new digital recording device to a conventional analog recording device. This is not described in the above-mentioned publicly known documents. It is necessary to provide the user with a means for realizing it without giving the copyright holder a disadvantage.

In view of the above problems, an object of the present invention is a device for realizing an operation such as moving to an analog recording device without violating the original intention of the copyright holder or the like or giving a disadvantage. To provide.

[0009]

In order to achieve the above object, in the digital information reproducing apparatus of the present invention, when the reproduced information is output from the apparatus in the analog signal format, the reproduced digital information is output. When outputting digital information to be reproduced from the device, which includes copy control information indicating whether to add an analog copy control signal for making recording impossible even when supplied to the analog information recording device, An analog copy control signal addition circuit that adds an analog copy control signal, a quality deterioration circuit that deteriorates the quality of output information, and copy control information is detected from reproduced digital information, and an analog copy control signal addition circuit and quality deterioration And a control detection circuit for controlling the circuit. When moving the reproduced digital information to the analog information recording device, the control detection circuit stops the analog copy control signal adding circuit from adding the analog copy control signal regardless of the detected copy control information. At the same time, the quality of the information output to the quality deterioration circuit is deteriorated.

In the digital information reproducing apparatus of the present invention, the reproduced digital information includes the first copy control information indicating whether or not the digital information can be recorded on another recording medium, and the analog copy. An analog copy control signal adding circuit, which includes the second copy control information indicating whether to add the control signal and adds the analog copy control signal when the reproduced digital information is output from the apparatus in the analog signal format. A quality deterioration circuit for deteriorating the quality of information to be output, a reproduction disabling circuit for disabling at least a part of the digital information on the recording medium, and a first copy control information and a first copy control information from the reproduced digital information. A control detection circuit that detects the second copy control information and controls the analog copy control signal addition circuit, the quality deterioration circuit, and the reproduction disable circuit. Provided. When the detected first copy control information indicates that recording on another recording medium is not permitted and the reproduced digital information is transferred to the analog information recording device, the control detection circuit detects the detected second copy control information. Regardless of the copy control information, the analog copy control signal addition circuit stops adding the analog copy control signal, deteriorates the quality of the information output to the quality deterioration circuit, and instructs the reproduction disable circuit to move. At least a part of the digital information that has been generated is made unplayable.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings as necessary. The present invention mainly relates to a method of recording information on an analog recording device, and particularly moving the information, but before the description thereof, the entire system to which the present invention is applied will be described.

FIG. 1 is a block diagram showing an embodiment of the entire system used in the present invention, and shows an example of transmitting / receiving information by broadcasting and recording / reproducing. This includes the device to which the invention is applied.
1 is an information providing station such as a broadcasting station, 2 is a relay station, 3 is a receiving device, 4 is a first recording / reproducing device, 5 is a display, 6 is a second recording / reproducing device, and 7 is a third recording / reproducing device. Is.
When recording a broadcast or the like, all of the first recording / reproducing apparatus 4, the second recording / reproducing apparatus 6, the third recording / reproducing apparatus 7, or the recording / reproducing apparatus 7 may be recorded in accordance with the copy control information attached thereto. , Either one or two can be recorded. The first recording / reproducing apparatus 4 will be described here as a digital recording system built in the receiving apparatus 3.
The recording medium may be a non-removable medium such as a hard disk. A removable device such as a video disk or a video tape may be used, but the recording / reproducing device built in the receiving device may be used for storing information for a relatively short period of time. For example, the temporary recording described above is mainly used. You can also use something that cannot be removed, such as when doing. The second recording / reproducing device 6 will be described here as a digital recording system, and the third recording / reproducing device 7 will be described as an analog recording system here.
As described above, the present invention records on an analog recording device,
Since it is related to movement, the third recording / reproducing apparatus 7 is necessary for performing the operation intended by the present invention. However, if either the first recording / reproducing apparatus 4 or the second recording / reproducing apparatus 6 does not exist, or if it exists, the intended operation can be realized. If only the information currently being broadcast is recorded in the third recording / reproducing device 7, neither the first recording / reproducing device 4 nor the second recording / reproducing device 6 exists or does not exist. However, it is possible if it is not operating.

The information providing station 1 such as a broadcasting station transmits a signal wave modulated by information via a relay station 2 such as a broadcasting satellite. Of course, other transmission methods such as cable transmission, telephone line transmission, and terrestrial broadcast transmission may be used. This signal radio wave received by the receiving device 3 on the receiving side is demodulated into an information signal as described later, and then, if necessary, the first recording / reproducing device 4, the second recording / reproducing device 6, Or a signal suitable for recording in the third recording / reproducing apparatus 7 and recorded. Also,
It is sent to the display 5. Here, the user can directly view the information content. Further, the information reproduced by the first recording / reproducing apparatus 4 and the second recording / reproducing apparatus 6 described above is given to the display 5 via the receiving apparatus 3, and the information such as the original video and audio is viewed. The information reproduced by the third recording / reproducing device 7 is also displayed on the display 5 by the same route.
However, since this is an analog device which has been generally used conventionally, its reproduction output may be directly applied to the analog input terminal of the display 5. When a removable recording medium on which information is recorded in advance, such as package software, is provided, the reproduction operation is performed after the reproduction operation is performed by, for example, the second recording / reproducing apparatus 6 to the third recording / reproducing apparatus 7. Be seen. Information is often exchanged between devices by digital signals, but for example, the receiving device 3 and the display 5 may be connected by analog signals.

FIG. 2 is a block diagram showing a configuration example of the information providing station 1 such as a broadcasting station in the above system. 11
Is a source generation unit, 12 is an encoding circuit for performing compression by the MPEG system, 13 is a scramble circuit, 14 is a modulation circuit, 15 is a transmission antenna, 16 is a management information addition circuit, 1
Reference numeral 7 is an input terminal.

Information such as video and audio generated by the source generating section 11 including a camera, a recording / reproducing apparatus, etc. is compressed by the encoding circuit 12 so that the information can be transmitted in a smaller occupied band. If necessary, the scramble circuit 13 performs transmission encryption so that only a specific viewer can view. After being modulated by the modulation circuit 14 to be a signal suitable for transmission, it is emitted as a radio wave from the transmission antenna 15 toward the relay station 2 such as a broadcasting satellite. At this time, the management information addition circuit 16 adds the information such as the current time, starting with the above-mentioned copy control information. Although omitted in FIG. 1, the request information is input from the input terminal 17 via a telephone line or the like. This is utilized in systems such as video-on-demand that determine the information to be sent in response to the viewer's request.

Actually, a plurality of pieces of information are often multiplexed on one radio wave by a method such as time division or spread spectrum. Although not shown in FIG. 2 for simplification, in this case, there are a plurality of systems of the source generation unit 11 and the encoding circuit 12, and the encoding circuit 12 and the scramble circuit 13 are provided.
A multiplex circuit that multiplexes a plurality of information is placed between and.

FIG. 3 is a block diagram showing an example of the configuration of the receiving device 3 in the system of FIG. 301 is RF
/ IF conversion circuit, 302 is a demodulation circuit, 303 is an error correction circuit, 304 is a descramble circuit for canceling the transmission code applied to the signal, 305 is the first demultiplexing circuit, 306 is an input / output terminal, and 307 is A second demultiplexing circuit, 308 is a decoding circuit, 309 and 310 are output terminals, 311 is a control circuit for controlling the entire receiving apparatus 3, 312 is an information management circuit, 313 is a command input circuit, and 314 is an input terminal. is there. Reference numeral 4 denotes a first recording / reproducing apparatus, which is incorporated in the receiving apparatus 3 as described in FIG. In the figure, the solid line shows the flow of main information such as video and audio, and the dotted line shows the flow of control signal information between each component.

First, regarding the components 301 to 310, the flow of information such as video and audio shown by solid lines will be described. Radio waves from a relay station such as a broadcasting satellite are input to the RF / IF conversion circuit 301. RF here
The radio waves in the band are frequency-converted into the IF band (Intermediate Frequency) and become a signal in a constant band that does not depend on the receiving channel, and the modulation operation performed for transmission by the demodulation circuit 302 is demodulated. Further, the error correction circuit 303
Then, after the error of the code generated during the transmission is detected and further corrected, the descramble circuit 304 cancels the transmission cipher. Then, it is sent to the first and second demultiplexing circuits 305 and 307. As described above, particularly in the case of digital broadcasting, a plurality of pieces of information are often multiplexed on one channel by a method such as time division or spread spectrum. The demultiplexing circuit separates only the desired information from this. The reason for providing the two demultiplex circuits is not only to enable so-called back program recording but also to provide the first demultiplex circuit 305.
This is to remove information that is not worth recording. In other words, the information often includes additional information such as weather forecasts and program broadcast schedules, which can be viewed at the time of broadcasting, but is not worth recording and watching at a later date. It can also be removed.

The output of the first demultiplexing circuit 305 is given to the first recording / reproducing apparatus 4, and if necessary,
It is recorded on the recording medium. The signal is also given to the input / output terminal 306, and signals are transmitted / received to / from the second recording / reproducing device 6 connected thereto. The input / output terminal 306 is a bidirectional terminal, and exchanges information to be recorded / reproduced with the second recording / reproducing apparatus 6 as digital data, for example. Generally, the connection according to the IEEE 1394 standard is often used.
Information transmitted from the descramble circuit 304, information reproduced by the first recording / reproducing apparatus 4, or a second recording / reproducing apparatus from the input / output terminal 306 is provided in the second demultiplexing circuit 307. The information reproduced in 6 is connected, and any one of the information desired to be viewed is selected, and further the desired information is separated. In the next decoding circuit 308, the data compression of the moving image performed before transmission is decoded and sent to the external device via the output terminals 309 and 310. For digital broadcasting, the number of scanning lines is 100, for example.
There are more than 0 HD (High Definition) information and about 500 SD (Standard Definition) information. According to this, if the former is HD output and the latter is SD output,
The information of the output terminal 309 is displayed on the HD compatible display.
It is preferable to supply the information of the output terminal 310 to the SD compatible display and the third recording / reproducing apparatus 7 of FIG. Therefore, the information of the output terminal 310 is preferably converted into analog, but the information of the output terminal 309 may be digital or analog depending on the input of the display.

Next, the control signal shown by the dotted line will be described. The control circuit 311 uses 305, 3
Control signals are exchanged with the respective constituent elements 07 and 308, and the entire receiving apparatus 3 is controlled so as to perform a desired operation. The information management circuit 312 supplies management data when the control circuit 311 performs control in response to a request. For example,
Information on the reception contract is managed here. When the user specifies the channel that he / she wants to watch, this specification is made on input terminal 3
14 and is sent to the control circuit 311 via the command input circuit 313. The control circuit 311 requests the information management circuit 312 for receiving contract information. When it is determined that there is a contract with the channel designated by the user, a control signal is sent to each of the above-mentioned components to instruct the receiving operation of the corresponding channel. Further, the information management circuit 312 manages timer reservation information by the user. At the reserved time for viewing, the control circuit 311 sends a control signal to each of the above-mentioned components to start the receiving operation.

Further, the first recording / reproducing apparatus 4 is the receiving apparatus 3
If it is built in, the recording / reproducing operation is performed according to the user's instruction input from the input terminal 314. Therefore, the output of the command input circuit 313 is supplied. This control signal may be supplied from the control circuit 311.

Next, FIG. 4 is a block diagram showing a configuration example of the control information signal in this embodiment. This control information is received by the receiving device 3 and is input to the first recording / reproducing device 4 or the second recording / reproducing device 6 to control the recording operation thereof, and when it is recorded on the recording medium, The contents are rewritten and recorded internally as necessary. Control information corresponding to this is recorded in advance in package software or the like. The contents will be explained. First, the type is whether the program is sold, rented, or made by yourself,
Indicates attribute information such as from broadcasting.

The copy control indicates whether or not the information can be recorded on the medium. Copy Never, Copy
One Generation (copy authorization for only one generation), Copy Free
One of the (copy authorization) is selected and decided by the copyright holder such as the creator of the information. In broadcasting, it is often given by the management information giving circuit 16 shown in FIG. Co
When showing py Free, you can record it as is. Copy O
When indicating ne Generation, as a general rule, Copy No mor
e (This was copied once with Copy One Generation,
Rewrite as "Prohibit copying any more"). If the temporary recording described below is allowed, Copy One Generatio
It is temporarily recorded either as n or rewritten as Copy No More. If it shows Copy Never,
In principle, it cannot be recorded, but if temporary recording is allowed, it will be recorded as Copy never. If the information software is provided on a recording medium, the right holder shall record it at the time of creation. That is, Copy Never, Copy One Generation, Cop
Since there are 4 states such as y No More and Copy Free, it can be transmitted with 2-bit information. Copy Never is (1,1), Copy One Generation is (1,0), Copy
No More is (0,1) and Copy Free is (0,0).

APS is copy control information (APS; Analogue Protection System; corresponding to analog copy control signal) to an analog recording device. This controls whether or not copying to an analog recording device is possible by adding a pseudo sync pulse to an analog video signal as described in, for example, Japanese Patent Laid-Open No. 61-288582. The operation of the third recording / reproducing apparatus 7 will be described later. In the previous copy control and APS in FIG. 4,
It is one of the most important elements in the present invention.

Pause is copy control information Copy
When indicating Never, it indicates whether or not the above-mentioned temporary recording can be performed. Temporary recording is called the Pause function because it functions as if the broadcasting was paused for a certain time.
For example, if temporary recording is permitted, "0" is set, and if it is prohibited, "1" is set. This allows the copyright holder side to manage the possibility of temporary recording.

Further, it is also possible to allow temporary recording in the information of Copy One Generation and utilize this bit to control the possibility of temporary recording. This does not allow temporary recording "1"
In case of, the copy control information is rewritten as Copy No More and recorded. If the temporary recording is “0”, copy control information is recorded as Copy One Generation, or
Or, if it is within the time limit when playing back and outputting after rewriting as Copy No More and recording, Copy One Gener
ation and rewrite and output.

In any case, if the temporary recording is "0", it may be rewritten to "1" which does not allow the temporary recording. It is possible to solve the problem of repeated temporary recording in another recording device within the time limit.

The time is, for example, the current time at the time of broadcasting given by the management information giving circuit 16 of FIG. For example, the temporary recording of the copy control information that is set as Copy Never has a limit on the time that can be played and viewed, but the time information is important for managing this.

[0029] Broadcasting means HD information (HD; High Def
inition; high definition), SD information (SD; Standard Defini)
(standard definition), etc., indicating the broadcasting system used by the information.

In the case of Copy Never information, the Pause time means a time limit during which the information can be reproduced and viewed after being temporarily recorded. This is generally as short as 90 to 120 minutes, which may be inconvenient for the user. For example, if it was temporarily recorded at midnight, it must be viewed before going to bed. Therefore, various times can be set by adding, for example, 3-bit information as the Pause time. "0
"01" is 90 minutes, "010" is a day, "011" is a week, "100" is a month, "101" is a half year, "11".
“0” is one year, “111” is unlimited, etc. As a result, the inconvenience of the user due to the short Pause time can be eliminated under the control of the copyright holder.
Even if you allow temporary recording for e Generation information,
You may use this bit. After temporary recording, during this period, the above-mentioned copy control information is copied to Copy One Generation.
Leave it as it is and rewrite it as Copy No More after the time limit has passed. Alternatively, copy control information to Cop
When rewritten as y No More and recorded and played back within the time limit, this is rewritten and output as Copy One Generation.

The above is recorded at a relatively fine time interval such as each frame of the image or each fixed amount of data as needed. The structure of the control information signal shown in FIG. 4 is an example, and various structures can be applied to the structure. Further, in the present invention, all the contents are not essential, and some of them may be omitted. Of course, the order is not limited to this.

Next, an example of the configuration of the decoding circuit 308 used in the present invention will be described with reference to the circuit block diagram of FIG. 5, and the operation of "moving" to the third recording / reproducing apparatus 7 which is an analog recording apparatus will be described. explain.

In FIG. 5, the terminals of 309 and 310 may be the same as those shown in FIG. 30801 is an input terminal, 30802 is a decoding circuit for compression operation performed before transmission, such as MPEG, 308
Reference numeral 03 is a control information detection circuit, 30804 is an up converter, 30805A is a down converter, 30805B is an image quality deterioration circuit, 30806 is a first switch, 3080
Reference numeral 7 is a second switch, 30808 is a resolution limiting circuit, 30809 is an APS addition circuit, 30810 is a third switch, and 30811 is an input terminal.

The most important operation of the decoding circuit 308 is the decoding of compression, and therefore the decoding circuit 308.
02 is a typical component. However, since this is a circuit block that outputs information from the receiving device 3 to an external device, other than the decoding circuit 30802, such as conversion of a signal format, addition of a signal, restriction of resolution as necessary, conversion to an analog signal, and the like. Many components are also provided.

The input terminal 30801 is input from the output of the second demultiplexing circuit 307 shown in FIG. 3, for example, information currently being broadcast, the first recording / reproducing device 4, or the input / output terminal 306. The reproduction information from the second recording / reproducing device 6 is given. This is decoded by the decoding circuit 30802, and the compression operation by MPEG etc. performed before the transmission is undone. Of these, at least information such as video and audio is given to the up converter 30804, the down converter 30805A, the first switch 30806, and the second switch 30807. Further, at least the control information is the control information detection circuit 30.
803. As described above, the output terminal 30
9 is suitable for outputting information to an HD compatible display, and the output terminal 310 is suitable for outputting information to the third recording / reproducing device 7 or the like by conventional analog recording. The signal format conversion for this purpose is as follows. To be done.

In the embodiment shown in FIG. 5, the decoding circuit 30802 inputs the information to the control information detection circuit 30803, but the second demultiplex circuit 307 shown in FIG. 3 outputs the control information detection circuit. The information may be directly input to 30803.

The control information detection circuit 30803 detects the APS from the control information shown in FIG. 4 and supplies the result to the APS signal addition circuit 30809. Also, the broadcasting system is detected and the result is given to the first switch 30806, the second switch 30807, and the third switch 30810. In addition, the restriction information such as the resolution is detected and the result is given to the restriction circuit 30808 such as the resolution. Although this control information is not shown in FIG. 4 in order to avoid complication of description, it may be added as 1-bit information, if necessary, so that the resolution and the like can be limited as described below. .

First, in the control information detection circuit 30803, as shown in FIG.
A case will be described in which the information is judged to be SD information from the information of the broadcasting system of. At this time, the first switch 30806
And the second switch 30807 selects a signal on the lower side (denoted by b in the figure) on the drawing, and the third switch 30810 selects the signal on the upper side (a in the figure) and connects it to the next component. . This information is an interlaced signal of about 480 to 540 scanning lines (hereinafter referred to as 480i to 540i).

Of the outputs of the decoding circuit 30802, those that are sent from the output terminal 310 to the external third recording / reproducing device 7 etc., pass through the second switch 30807 as they are, and pass through the image quality deterioration circuit 30805B to the APS. It is given to the additional circuit 30809. Image quality deterioration circuit 30805
The operation of B will be described later, but the quality of the image actually output deteriorates when "moving" is performed. When the control information detection circuit 30803 detects a request to apply the copy control information APS to the analog recording device and output it from the APS information of FIG. 4, the APS addition circuit 308.
In 09, it is impossible to normally record information by the external third recording / reproducing circuit 7 by adding a pseudo sync signal as described in JP-A-61-288582, for example. .

Of the outputs of the decoding circuit 30802, the external display 5 (here, HD
First, an upconverter 30804 converts an interlaced signal (hereinafter, referred to as 1080i) of about 1080 scanning lines into a signal which is apparently equivalent to HD information. Become. Then, the first switch 30806 and the third switch 308
It is given to the output terminal 309 via 10.

Next, the case where the control information detection circuit 30803 determines that the information is HD information will be described. This information is an interlaced signal (1080i) of about 1080 scanning lines. At this time, the first switch 3080
6 and the second switch 30807 select the signal on the upper side (a in the drawing) in the drawing, and the third switch 30810 selects the signal on the lower side (b in the drawing) and connects it to the next component.

Of the outputs of the decoding circuit 30802, those which are sent from the output terminal 310 to the external third recording / reproducing device 7 etc. are first subjected to a down converter 30805A to reduce the number of scanning lines, for example, signals of 480i to 540i. Then, the second switch 30807 and the image quality deterioration circuit 308
05B, and further upon request, the APS addition circuit 30
At 809, a pseudo sync signal is added to the output terminal 310.

Of the outputs of the decoding circuit 30802, those output from the output terminal 309 to the external display 5 pass through the first switch 30806 as they are and are given to the resolution limiting circuit 30808. When the control information detection circuit 30803 detects a request to limit resolution when analog output of HD information is performed from a device, for example, the resolution limitation circuit 30808 changes
Resampling or filtering in the horizontal direction,
For example, it is limited to about 960 pixels, and in the vertical direction, for example, it is converted into a progressive signal (hereinafter 540P) of about 540 scanning lines, or converted into 480P, 480i, 540i, etc. to limit. Then, it passes through the third switch 30810 and is given to the output terminal 309. Since the HD information has high quality, it is often avoided to output the analog information in an analog format which can be easily processed by a third party. Therefore, the output terminal 309
This limitation may be applied when analog output is performed from. Especially used when the copy control information is other than Copy Free.

Even if the information is HD information, if the resolution limitation is not required, the resolution limiting circuit outputs the input information as it is without limiting the resolution. Alternatively, this can be realized by selecting the input information on the a side of the third switch 30810.

The output terminals 309 to 480i, 540i, 54
When 0P (or less than 720P) information is output and input to the display 5, if the display 5 is HD compatible, it can be up-converted here and converted into a high definition information format for display. Many. This up-conversion processing is performed by the resolution limiting circuit 3080.
It is also possible to carry out together with 8.

A DA for converting information into analog information
The conversion circuit has not been described so far, but the location is not particularly limited. If connecting to the display with analog information, the third switch 30810 and the output terminal 309
And between the APS adding circuit 30809 and the output terminal 310. Of course, in the former case, it may be outside the output terminal 309 and in front of the display 5. If you want to connect the display 5 with digital information,
Naturally, it is inside the display 5. Even in this case, especially when an analog output is provided on the display 5,
It may be necessary to limit the resolution here.

Next, an operation mode called "move" or "move" will be described. This records the information whose copy control information was Copy One Generation, and
It is applied after it becomes opyNo More, or after it is temporarily recorded and the above time limit is exceeded and it is output as CopyNo More. Copy NoMor
Even if it is e, if you do not increase the recorded medium,
Even if the medium is changed, there is no disadvantage to the copyright holder. For example, the user is provided with a means for moving what is first recorded on the hard disk to a tape and storing it, which improves usability.

The conditions for carrying out this movement are as follows. (1) When recording on a new medium, by deleting all or part of the information on the original medium, it is possible to reproduce and output information of at least a practical level quality from the original medium. Try not to. (2) The number of devices to move to is limited to one.

Among the above conditions, (1) achieves the purpose by generating a meaningless code as information in the recording circuit in the case of a disk medium and overwriting the recorded encrypted information on the medium, for example. it can. (2) In the case where both the source device and the destination device are new digital recording devices, device authentication such as key exchange is performed between them, and this is done only between the two devices. 1
It suffices if it is satisfied on a one-to-one basis. If you do this,
Even if a bus is connected to a device other than the destination device, there is no fear of recording there and the number of recorded media will not increase. At the time of migration, the copy control information output from the migration source device may be rewritten as Copy One Generation so that the migration destination device can record it. At this time, the original Copy One Generation
Unlike, it must prevent recording on multiple devices. This can be satisfied if the above-mentioned authentication is performed.

However, the device connected as the destination is
It must be taken into consideration also in the case of the third recording / reproducing apparatus 7 which is a conventional analog recording apparatus. This only supplies an analog signal and does not have the one-to-one device authentication function as described above.

Here, it is assumed that the device as the movement source is the first recording / reproducing device 4. When the second recording / reproducing device 6 is the source of movement, the operations of the first and second recording / reproducing devices are simply reversed, and therefore the description thereof is omitted.

It is assumed that the only device that functions as a destination is the third recording / reproducing device 7 connected to the output terminal 310 of FIG. That is, it is assumed that the second recording / reproducing apparatus 6 is not connected to the input / output terminal 306, or even if it is connected by a cable, it is not authenticated as a destination. It is assumed that the user gives an instruction to move with a command from the input terminal 314. The reproduction output from the first recording / reproducing apparatus 4 reaches the output terminal 310 through the above-mentioned process and is given to the third recording / reproducing apparatus 7. Original copy control information
Those that impose restrictions such as Copy One Generation may require the addition of APS to the conventional analog output, and it is not possible to move to the third recording / reproducing apparatus 7 as it is. Therefore, in the case of movement, the APS addition circuit 30 from the control circuit 311 via the input terminal 30811 of FIG.
A command is sent to 809 and A
Do not add the PS signal. After the movement, the first recording / reproducing apparatus 4 records a meaningless code as information on the corresponding portion of the recording medium so that further reproduction cannot be performed. This allows the transfer to the analog recording device. In this case, it is possible to move to a plurality of analog recording devices, and it is possible to repeat copying after that, but in the case of general-purpose analog devices, it is unlikely that the quality will be higher than a certain level, especially if copying is performed. There is no problem because the repetition of the above causes a large quality deterioration.

Depending on the system, the APS of FIG. 4 is effective only when the copy control information is Copy No More, and at this time, it may be utilized as information indicating whether or not recording to the analog recording device is permitted. In this case, when performing the movement operation instead of recording, the control detection circuit 30803
According to the information of the APS detected by, when the control information for adding the APS signal is detected, the control information is added to make it impossible to move to the analog recording device, and when the information not added is detected, it is moved. Is possible. Also, APS
There is also a method of enabling movement without adding the APS signal regardless of the information of. In the former case, input terminal 30811 to A
The connection to the PS addition circuit 30809 becomes unnecessary. Also,
When the copy control information is other than Copy No More, whether or not to permit recording to the analog recording device is to be separately determined. It is determined according to the detected copy control information.

Next, consider a case where both the second recording / reproducing apparatus 6 and the third recording / reproducing apparatus 7 are connected as the destination apparatus. It is assumed that the authentication between the former and the first recording / reproducing apparatus 4 has already been established. As described above, since there is a limit to the quality of what is recorded by a general-purpose analog recording device, it may be acceptable to move to both devices. (However, movement to multiple digital recording devices is not allowed.) However, considering the original intention of movement, consider the case of either one. First, there is a method of inquiring the user which device to move to. Input terminal 31
In response to the response command from 4, the destination device is selected.

If the second recording / reproducing apparatus 6 is selected, a command is sent from the control circuit 311 to the APS adding circuit 30809 via the input terminal 30811 so that the APS signal is added regardless of the contents of the APS shown in FIG. Then, the third recording / reproducing apparatus 7 cannot record. The copy control information of the information sent to the second recording / reproducing apparatus 6 is Copy One Generat.
Ion is rewritten by the first recording / reproducing apparatus 4 and output. After the movement to the second recording / reproducing apparatus 6, the information of the relevant portion in the first recording / reproducing apparatus 4 is also impossible to reproduce any more.

If the movement to the third recording / reproducing apparatus 7 is selected, the APS signal is not added by the APS adding circuit 30809 so that recording can be performed here, and it is established between the first and second recording / reproducing apparatuses. The device authentication that was being performed is abandoned and the transfer is not performed during this period. After that, the information of the corresponding portion in the first recording / reproducing apparatus 4 makes further reproduction impossible.

Further, instead of allowing the user to select the destination device, the device can be automatically set. Either one may be selected, but the second recording / reproducing device 6 which can be limited to only one moving destination is preferentially selected, and there is no problem that the number of recorded media increases.

Finally, the image quality deterioration circuit 30805B of FIG. 5 will be described. This is for deteriorating the image quality when moving information to the third recording / reproducing apparatus 7 which is a conventional analog recording apparatus and is connected to the output terminal 310. That is, when moving to a conventional analog recording device, it is difficult to limit the number of devices to be moved to one, and there is a problem that copying can be performed any number of times after moving. In the present invention, since a certain amount of stopping is applied to this, the image quality is deteriorated to the extent that it cannot be used for commercial purposes or to the extent that it cannot be practically used even if it is duplicated by an analog device. In the operations other than the movement, the image signal is not deteriorated positively, and the information signal is passed as it is. Therefore, the control information from the input terminal 30811 is connected, and switching is performed so as to deteriorate the image quality during the movement operation. The method of image quality deterioration can easily reduce the horizontal resolution by simply limiting the frequency band.
In addition to this, a method of deteriorating the waveform response in a portion where the image content changes abruptly can be considered. Both can be realized by either analog or digital methods. The position of the image quality deterioration circuit 30805B is not limited to the example of FIG. 5, and may be between the APS addition circuit 30809 and the output terminal 310, for example. Although not shown, quality degradation may be performed on the reproduced audio signal by limiting the frequency band or increasing distortion.

[0059]

As described above, according to the present invention, it is possible to move to an analog recording device which has been generally used, and the usability for the user can be improved. Also, when a plurality of devices are connected, the user can select which device to move to. In addition, digital,
When both analog devices are connected, if the former is preferentially selected as the movement destination and automatically selected, the original operation of the movement mode in which the number of recorded media is not increased can be performed. Further, when moving to the analog recording device, the image quality is deteriorated to such an extent that it cannot be commercialized or cannot be practically used even if it is copied more than that. Therefore, it is possible to stop the creation of the copy by the analog recording device. And so on.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an entire digital information transmission / reception recording system to which the present invention is applied.

2 is a block diagram showing an example of a configuration of an information providing station 1 such as a broadcasting station in FIG.

3 is a block diagram showing an example of a configuration of a receiving device 3 in FIG.

FIG. 4 is a block diagram showing an example of the configuration of a control information signal according to the present invention.

5 is a block diagram showing an example of a configuration of a decoding circuit 308 in FIG.

[Explanation of symbols]

1 ・ ・ Information stations such as broadcasting stations 16 ... Management information addition circuit 2 ... Relay station 3 ... Receiving device 308 ... Decoding circuit .. Control information detection circuit 30805A Down converter 30805B Image quality deterioration circuit 30809 ... APS addition circuit 4 ... First recording / reproducing device 5 ... Display 6 ... Second recording / reproducing device 7 --- The third recording / reproducing device

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Atsushi Yoshioka             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department F-term (reference) 5C053 FA13 FA20 GA11 GB37 JA21                       LA06 LA07                 5D044 AB05 AB07 BC01 BC06 CC03                       CC04 DE15 DE49 DE50 FG18                       HH13 HL08                 5D080 AA03 AA07 BA03 DA07 EA02                       EA35 GA01

Claims (2)

[Claims] 1. A digital information reproducing apparatus for reproducing digital information including video information or audio information from a recording medium, wherein the reproduced digital information includes reproduced information in analog signal format from the apparatus. When output, it includes copy control information indicating whether or not an analog copy control signal for making recording impossible even if supplied to an analog information recording device is added, and the reproduced digital information is converted into an analog signal format. When outputting from the device, the analog copy control signal adding circuit that adds the analog copy control signal, the quality deterioration circuit that deteriorates the quality of the information output in the analog signal format, and the digital information that is reproduced Detects the copy control information and controls the analog copy control signal addition circuit and the quality deterioration circuit In the case of moving the reproduced digital information to the analog information recording device, the control detection circuit is configured so that the analog copy control signal adding circuit is irrespective of the detected copy control information. A digital information reproducing apparatus characterized in that the addition of the analog copy control signal is stopped and the quality of the information output to the quality deterioration circuit is deteriorated. 2. A digital information reproducing apparatus for reproducing digital information including video information or audio information from a recording medium, wherein the reproduced digital information is recorded on another recording medium. The first copy control information indicating whether or not to permit the recording and the analog for making recording impossible even when supplied to the analog information recording device when the reproduced information is output from the device in the analog signal format. An analog copy control including second copy control information indicating whether to add a copy control signal, and adding the analog copy control signal when the reproduced digital information is output from the apparatus in an analog signal format. A signal addition circuit, a quality deterioration circuit that deteriorates the quality of the information output in the analog signal format, and a digital information on the recording medium. A reproduction disabling circuit for disabling at least a part of the circuit, and the analog copy control signal adding circuit and the analog copy control signal adding circuit for detecting the first copy control information and the second copy control information from the reproduced digital information. It is shown that a quality deterioration circuit and a control detection circuit for controlling the reproduction disable circuit are provided, and that the first copy control information detected by the control detection circuit is not permitted to be recorded on another recording medium. When the digital information to be recorded is transferred to the analog information recording device, the control detecting circuit adds the analog copy control signal to the analog copy control signal adding circuit regardless of the detected second copy control information. The quality of the information output to the quality deterioration circuit is deteriorated, and at the same time, the digitization signal instructed to move to the reproduction disabling circuit is stopped. Digital information reproducing apparatus characterized by regenerating disabling at least a portion of the Le information.