JP3381164B2 - Video signal transmission method, video signal recording method, video signal reproduction method, video signal recording device, and video signal reproduction device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal transmitting method, a video signal recording method, a video signal reproducing method, a video signal recording device and a video signal reproducing method capable of effectively preventing illegal copying of a video signal. It relates to the device.

[0002]

2. Description of the Related Art With the widespread use of recording / playback devices, prerecorded video tapes on which movies and the like are recorded are generally sold. It is forbidden by law to make a duplicate of such a recorded videotape, but if two recording / playback devices can be prepared, the above-mentioned recorded videotape can be easily duplicated by copying (dubbing). Can be created.

In order to prevent such illegal copying of a video tape, a 1-bit dubbing prevention signal is inserted in a state separable from a video signal, as disclosed in, for example, Japanese Patent Laid-Open No. 52-132811. The applicant has previously proposed a recorded recording medium.

[0004]

By the way, in the conventional method for preventing illegal copying by inserting a 1-bit dubbing prevention signal, the permission / prohibition of copying, that is, the presence or absence of copyright, is used for the 1-bit dubbing prevention signal. It can only be shown with the generation limit (SCMS: Serial C
opy Management System) cannot be supported.

Therefore, in view of the above-mentioned conventional circumstances, the present invention aims to enable not only the presence / absence of a copyright but also the generation restriction so that the copyright information and the generation information can be displayed. A method of transmitting a video signal, which is transmitted together with a signal, is provided.

Another object of the present invention is to provide a video signal recording method and a video signal recording apparatus capable of recording copyright information and generation information together with a video signal on a recording medium.

Another object of the present invention is to provide a video signal recording method and a video signal recording device capable of prohibiting recording on a recording medium together with a video signal based on copyright information and generation information. It is in.

Still another object of the present invention is to provide a video signal reproducing method and a video signal reproducing apparatus capable of outputting copyright information and generation information together with a reproduced video signal.

[0009]

A video signal transmission method according to the present invention superimposes a 20-bit digital signal on a 20th line or a 283rd line which is a video section other than an effective video section for displaying an image on a screen. As the 20-bit digital signal, 2-bit aspect information indicating an aspect ratio of a video signal, 4-bit header information, copyright information indicating whether or not there is a copyright, and copyable generation 1 or Generation information indicating 0, the header information indicates that the copyright information and generation information are included in [0000], and the copyright information and the generation for each odd field and even field of the video signal. When the copyright information is [1] and the generation information is [1], a video signal for which copying is prohibited is transmitted. In addition, the video signal recording method according to the present invention uses a video signal as a recording medium by superimposing a 20-bit digital signal on the 20th line or the 283rd line, which is a video section other than an effective video section for displaying an image on a screen. A video signal recording method for recording, comprising, as the 20-bit digital signal, 2-bit aspect information indicating an aspect ratio of a video signal, 4-bit header information, and a copyright indicating whether or not there is a copyright. Information and generation information indicating that the copyable generation is 1 or 0, the header information is [0000] indicating that the copyright information and the generation information are included, and an odd field of the video signal and The copyright information and the generation information are inserted in every even field, and when the copyright information is [1] and the generation information is [1], copying is prohibited. Wherein the recording the image signal on a recording medium. Further, according to the video signal recording method of the present invention, a 20-bit digital signal is superimposed on the 20th line or the 283rd line which is a video section other than the effective video section for displaying an image on the screen, and the 20-bit digital signal is added. , 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, copyright information indicating whether or not there is a copyright, and a generation indicating that the copyable generation is 1 or 0. Information, the header information is indicated by [0000] to include the copyright information and the generation information, and the video in which the copyright information and the generation information are inserted in every odd field and even field of the video signal. A video signal recording method for recording a signal on a recording medium, wherein copyright information and generation information included in the 20-bit data are detected and detected. Based on the copyright information and the generation information, permission or prohibition of recording the video signal on the recording medium is selected, and the copyright information is [1] and the generation information is [1]. It is characterized in that recording on a recording medium is prohibited.

According to the video signal reproducing method of the present invention, the 20th line or 283 which is a video section other than the effective video section for displaying an image on the screen of the video signal reproduced from the recording medium.
A 20-bit digital signal is superimposed on the line and
As a bit digital signal, 2-bit aspect information indicating the aspect ratio of a video signal, 4-bit header information, copyright information indicating whether or not there is a copyright, and the copyable generation is 1 or 0. It is indicated that the header information includes the copyright information and the generation information at [0000], and the copyright information and the generation information are included for each odd field and even field of the video signal. When inserted, if the copyright information is [1] and the generation information is [1], a video signal for which copying is prohibited is output.

The video signal recording apparatus according to the present invention is a video section other than an effective video section in which an image is displayed on the screen.
A 20-bit digital signal is superimposed on the 0th line or the 283rd line, and as the 20-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, and copyright or copyright The header information includes copyright information indicating no right and generation information indicating that the copyable generation is 1 or 0.
[000] indicates that the copyright information and the generation information are included, and an insertion processing unit that inserts the copyright information and the generation information into each of the odd field and the even field of the video signal is provided. 1], and when the generation information is [1], a video signal whose copying is prohibited is recorded on the recording medium. Further, the video signal recording apparatus according to the present invention superimposes a 20-bit digital signal on the 20th line or the 283rd line, which is a video section other than the effective video section for displaying an image on the screen, and outputs the 20-bit digital signal. , 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, copyright information indicating whether or not there is a copyright, and a generation indicating that the copyable generation is 1 or 0. Information, the header information is indicated by [0000] to include the copyright information and the generation information, and the video in which the copyright information and the generation information are inserted in every odd field and even field of the video signal. A video signal recording device for recording a signal on a recording medium, the information detecting means detecting the copyright information and the generation information contained in the 20-bit data. A recording control means for permitting or prohibiting recording of the video signal on a recording medium based on the copyright information and the generation information detected by the information detecting means, wherein the recording control means detects the detected copyright. Based on the information and the generation information, permission or prohibition of recording the video signal on the recording medium is selected, and the copyright information is [1] and the generation information is [1]. It is characterized by prohibiting recording to.

The video signal reproducing apparatus according to the present invention is the 20th line or 283 which is a video section other than the effective video section for displaying an image on the screen of the video signal reproduced from the recording medium.
A 20-bit digital signal is superimposed on the line and
As a bit digital signal, 2-bit aspect information indicating the aspect ratio of a video signal, 4-bit header information, copyright information indicating whether or not there is a copyright, and the copyable generation is 1 or 0. It is indicated that the header information includes the copyright information and the generation information at [0000], and the copyright information and the generation information are included for each odd field and even field of the video signal. It is characterized by including an insertion processing means for inserting, and outputting a video signal for which copying is prohibited when the copyright information is [1] and the generation information is [1].

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

A video signal transmission method according to the present invention is characterized in that copyright information and generation information are superimposed on a section other than an effective video section displayed on a screen of the video signal and the copyright information and the generation information are transmitted together with the video signal. For example, as in the first embodiment shown in FIG. 1, the copyright information S ₁ and the generation information S ₂ are alternately transmitted for each field together with the NTSC video signal.

In the first embodiment, the presence / absence of copyright for an NTSC video signal is shown by "1/0" in FIG.
1-bit copyright information S ₁ as shown in FIG. 3 is superimposed on the 20th line (the 20th line of the odd field), and the 1-bit generation as shown in FIG. The information S ₂ is transmitted on the 283rd line (the second of the even field
0 line), the copyright information S ₁ and the generation information S ₂ are alternately transmitted for each field together with the NTSC video signal.

As described above, by transmitting the copyright information and the generation information alternately for each field together with the NTSC video signal, the receiving side receives the horizontal sync signal and the vertical sync signal for the received NTSC video signal. Field determination based on the
The copyright information is detected from the line, and the second field of the even field is detected.
Generation information can be detected from the 0th line, and generation restriction can be performed using the above copyright information and generation information.

In the video signal transmission method according to the invention,
As in the second embodiment shown in FIG. 4, copyright information and generation information may be alternately transmitted field by field as a specific 1 bit of a video ID together with an NTSC video signal.

In the second embodiment, for an NTSC video signal, a 1-bit copyrighted information indicating "1/0" as a specific 1-bit of a video ID as shown in FIG. The right information S ₁ is superimposed on the 20th line (the 20th line of the odd field), and the number of generations that can be copied as a specific 1 bit of the video ID as shown in FIG.
The 1-bit generation information S ₂ indicating “/ 1” is superimposed on the 283rd line (the 20th line of the even field), and the NTS
Copyright information S ₁ and generation information S along with C format video signal
₂ is transmitted alternately for each field.

As described above, the copyright information and the generation information are alternately transmitted field by field as a specific 1 bit of the video ID together with the video signal of the NTSC system, so that the receiving side receives the received video signal of the NTSC system. ,
Field discrimination is performed based on the horizontal synchronizing signal and the vertical synchronizing signal, and the video I from the 20th line of the odd field
The copyright information can be detected as the specific 1 bit of D, and the generation information can be detected as the specific 1 bit of the video ID from the 20th line of the even field, and the copy information can be detected using the copyright information and the generation information. Generational restrictions can be applied.

Further, in the video signal transmitting method according to the invention,
As in the third embodiment shown in FIG. 7, the copyright information S ₁ and the generation information S ₂ may be transmitted for each field together with the NTSC video signal.

In the third embodiment, the presence / absence of copyright as shown in FIG.
The 1st bit copyright information S ₁ indicated by “0” and the 1-bit generation information S ₂ indicating the number of generations that can be copied “0/1” are used as data for 1 line, and the 20th line (the 20th line of the odd field) ) And the 283rd line (the 20th line of the even field), respectively, and the copyright information S ₁ and the generation information S ₂ are transmitted every field together with the NTSC video signal.

As described above, by transmitting the copyright information and the generation information together with the NTSC video signal in each field, the receiving side can transmit the copyright information and the generation information in each field for the received NTSC video signal. It is possible to detect and limit generation of copies.

Further, in the video signal transmitting method according to the invention,
As in the fourth embodiment shown in FIG. 9, the copyright information and the generation information may be transmitted in each field as the specific 2 bits of the video ID together with the NTSC video signal.

In the fourth embodiment, as shown in FIG. 10, for example, as shown in FIG. 10, a 1-bit copyright information S ₁ indicating the presence / absence of a copyright and a copy of the copyright information S ₁ are copied to an NTSC video signal. The 20th line (the 20th line of the odd field) and the 283rd are defined as the video ID for which 1-bit generation information S ₂ indicating the possible generation number “0/1” is assigned to specific 2 bits. The copyright information S ₁ and the generation information S ₂ are transmitted in each field together with the video signal of the NTSC system by being superposed on each line (the 20th line of the even field).

In the video ID, the header bit may be omitted as shown in FIG. 11 or the reference bit may be omitted as shown in FIG.

As described above, the copyright information and the generation information are transmitted in each field as the specific 2 bits of the video ID together with the NTSC video signal, so that the receiving side can receive each field of the received NTSC video signal. It is possible to detect generation information in each field as specific 2 bits of the video ID of the 20th line, and perform copy generation restriction using the copyright information and the generation information.

In the video signal transmission method according to the invention,
As in the fifth embodiment shown in FIG. 13, the copyright information S ₁ and the generation information S ₂ may be transmitted for each field as data for two lines of the NTSC video signal.

In the fifth embodiment, the presence / absence of copyright as shown in FIG.
The 1-bit copyright information S ₁ indicated by "0" is used as data for one line, and is superimposed on the 19th line (19th line of odd field) and the 282nd line (19th line of even field), and copied. The 20th line (the 20th line of the odd field) and the 283rd line (the 20th line of the even field) are used as 1-bit generation information S ₂ indicating the number of possible generations “0/1” as data for the next 1 line. ), The copyright information S ₁ and the generation information S ₂ are transmitted for each field together with the NTSC video signal.

As described above, the NTSC system video signal and 2 of the 19th line and the 20th line of each field are used.
Copyright information S ₁ and generation information S ₂ as line data
By transmitting each of the above in each field, the receiving side can detect the copyright information and the generation information in each field of the received NTSC video signal and limit the generation of copying.

Further, in the video signal transmitting method according to the present invention, as in the sixth embodiment shown in FIG. 15, the copyright information is provided together with the video signal of the NTSC system as each specific 1 bit of the video ID for 2 lines. Generation information may be transmitted every field.

In the sixth embodiment, 1-bit copyright information S ₁ indicating the presence / absence of copyright by "1/0" is specified for an NTSC video signal, for example, as shown in FIG. The video ID assigned to 1 bit of 1 is superimposed on the 19th line (the 19th line of the odd field) and the 283rd line (the 19th line of the even field) as data for one line, and the number of copyable generations The 20th line (the 20th line of the odd field) and the 283rd line (the even field) are used as the data for one line, which is the video ID in which the 1-bit generation information S ₂ indicating “0/1” is assigned to the specific 1 bit. And the copyright information S ₁ and the generation information S ₂ are transmitted in each field together with the NTSC video signal.

As described above, the copyright information and the generation information are transmitted for each field as a specific 1 bit of each video ID of the 19th line and the 20th line of each field together with the video signal of the NTSC system. For the received NTSC video signal, the copyright information and the generation information are detected for each field as a specific 1 bit of each video ID of the 19th line and the 20th line of each field, and the copyright information and the generation information are detected. Can be used to limit copy generation.

Here, in the above-described first to sixth embodiments, the NTSC system video signal is superimposed on the copyright information and the generation information on the 19th and 20th lines of each field to obtain the NTSC. Although the copyright information S ₁ and the generation information S ₂ are transmitted together with the video signal of the system, in the video signal transmission method according to the present invention, the line for superimposing the copyright information and the generation information is the line of each field. The line is not limited to the 19th line and the 20th line, and may be a line of a section other than the effective video section substantially displayed on the screen of the video signal. Further, the video signal transmission method according to the present invention is not only effective for NTSC system video signals, but can be applied to PAL system and HD system video signals.

For example, for an HD video signal, as shown in FIG. 17, for example, 1-bit copyright information S ₁ indicating the presence / absence of a copyright by "1/0" and the number of copyable generations "0" The 1st-bit generation information S ₂ indicating “/ 1” is assigned to a specific 2 bits as a video ID for one line, and the 32nd line (the 32nd line of the odd field) and the 595th line (the 1st line of the even field). 32 lines) and the copyright information S together with the HD video signal.
By transmitting ₁ and generation information S ₂ every field,
On the receiving side, generation information is detected for each field of the received HD video signal as specific 2 bits of the video ID of the 32nd line of each field, and the copy information is generated using the copyright information and the generation information. You can make restrictions.

In each of the embodiments of the video signal transmission method according to the present invention as described above, it is possible to perform copy generation restriction as shown in Table 1 by using the copyright information and the generation information.

[0036]

[Table 1]

Here, in Table 1 above, the copyright information S
₁ Is the presence or absence of copyright, S ₁ = 0, no copyright
Indicates S₁ = 1 indicates that there is copyright. Also generation
Information S₂ Indicates the number of generations that can be copied, and S₂ To = 0
Indicates that the number of copyable generations is [1], and S₂ =
With 1, the number of generations that can be copied

It indicates that it is [0].

When the copyright information S ₁ is "0", the copyright information S ₁ superposed on the analog video signal received by the television tuner 1 is, for example, as shown in FIG. When it is "0", the generation information S ₂
Is "0" or "1", the recording of the analog video signal by the first video tape recorder 2 is permitted, and the video tape from the recorded video tape on which the analog video signal is recorded is changed to another video tape. It is also possible to permit the dubbing of the analog video signal to, that is, the copying of the video signal from the first video tape recorder 2 to the second video tape recorder 3.

Further, as shown in FIG. 19, for example, the copyright information S ₁ superimposed on the analog video signal output from the television tuner (or video tape recorder) 4 is "1" and the generation information S ₂ Is 0, the recording of the analog video signal by the first video tape recorder 5 is permitted. Then, in the first video tape recorder 5, the copyright information S indicating that there is a copyright is available.
₁ = 1 and the number of copyable generations

The generation information S ₂ = 1 indicating [0] is superimposed on the analog video signal, and the copyright information S ₁ and the generation information S ₂ are recorded on a video tape together with the analog video signal. When the analog video signal recorded by the first video tape recorder 5 is reproduced, the reproduced video signal contains copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations.

Since the generation information S ₂ = 1 indicating that it is [0] is superimposed, dubbing of the analog video signal from the recorded video tape recording the analog video signal to another video tape, that is, the first video. Copying of the video signal from the tape recorder 5 to the second video tape recorder 6 can be prohibited.

Further, copyright information S ₁ indicating that there is a copyright
= 1 and the number of generations that can be copied

By recording the video signal on which the generation information S ₂ = 1 indicating [0] is superimposed on the recording medium, the video reproduced by the video disc player 7 from the video disc as shown in FIG. 20, for example. Recording the signal on the video tape by the video tape recorder 8 can be prohibited.

The copyright information S ₁ and the generation information S _{2 as} described above
The recording system of the video tape recorder that records the video signal on the video tape together with the video signal is configured as shown in FIG.

In the recording system of the video tape recorder shown in FIG. 21, the copyright information S ₁ and the generation information S are added to the input video signal.
_The superposition processing unit 10 for superposing ₂ is provided, and the superposition processing unit 1
A recording signal processing circuit 11 to which the input video signal is supplied via 0 generates a recording signal, and the recording signal is recorded on a video tape 13 via a recording head 12.

The superposition processing section 10 outputs a copy to the input video signal.
Copyright information S superimposed as P-protect information
₁ And generation information S₂ Copy protection information detection
The copy protection information detection unit 14 is provided with a unit 14.
Copyright information detected by S ₁ And generation information S₂ Based on
The control unit 15 writes new copy protection information.
Recording control signal is generated and the above new copy protection information
To the copyright information S by the encoder 16.₁ And generation information S₂ 
Converted to this copyright information S₁ And generation information S₂Copy
The above-mentioned input image by the superposition circuit 17 as the protection information.
It is designed to be superimposed on the signal.

The copy protection information detecting section 1 is also provided.
Reference numeral 4 includes a sync separation circuit 18 for separating a vertical sync signal and a horizontal sync signal from an input video signal. Based on the vertical sync signal and the horizontal sync signal obtained by the sync separation circuit 18, the timing generator 19 inputs the signal. A timing pulse indicating the position of the copy protection information of the video signal is generated, and based on the timing pulse generated by the timing generator 19, the decoder 20 outputs the copyright information S ₁ from the input video signal.
And generation information S ₂ is detected.

Then, in the control section 15, based on the copyright information S ₁ and the generation information S ₂ detected by the copy protection information detection section 14, the copy protection information and the recording control are performed according to the procedure shown in the flowchart of FIG. By generating a signal, copy generation control is performed.

That is, the control unit 15 first determines in step 1 whether or not there is a copyright based on the copyright information S ₁ . When the result of judgment in Step 1 without S ₁ = 0 i.e. copyright shifts to the step 2, copyright information S ₁ of S ₁ = 0 and S ₂ = 0 or S ₂ =
The copy protection information that causes the encoder 16 to output the first generation information S ₂ is generated, and in step 3, the recording control signal indicating the copy permission is generated.

If the result of the determination in step 1 is S ₁ = 1 (ie, there is a copyright), the process proceeds to step 4 and the copy generation is determined based on the generation information S ₂ . Then, the determination result in step 4 is S ₂ = 1 that is, the number of copyable generations is

If it is [0], the process proceeds to step 5 to generate a recording control signal indicating copy inhibition.

Further, when the result of the determination in step 4 is S ₂ = 0, that is, the number of copyable generations is 1, the process proceeds to step 6 and the copyright information S ₁ and S ₁ with S ₁ = 1
_The copy protection information for causing the encoder 16 to output the generation information S ₂ of ₂ = 1 is generated, and further, in step 7, the recording control signal indicating the copy permission is generated.

In the recording system of this video tape recorder, the recording signal processing circuit 11 performs a recording signal generation process in accordance with the recording control signal generated by the control section 15, and indicates copy permission. When the recording control signal is supplied from the control unit 15, the superimposition processing unit 10 generates a recording signal for the input video signal on which the copyright information S ₁ and the generation information S ₂ are superimposed. Also,
When the recording control signal indicating the copy prohibition is supplied from the control unit 15, the recording signal processing circuit 11 stops the generation processing of the recording signal.

In the video tape recorder having the recording system having such a configuration, the copyright information S ₁ and the generation information S ₂ are superimposed on the input video signal in a section other than the effective video section displayed on the screen. 10, the copyright information S ₁ and the generation information S ₂ can be recorded on the video tape 13 together with the video signal. A recording control signal is generated by the control unit 15 based on the copyright information S ₁ and the generation information S ₂ detected from the input video signal by the copy protection information detection unit 14, and the recording control signal is generated according to the recording control signal. Since the recording signal processing circuit 11 is configured to generate the recording signal, only the video signal for which copying is permitted by the control unit 15 can be recorded on the video tape 13.

The process of superimposing the copyright information S ₁ and the generation information S ₂ on the video signal is, for example, as shown in FIG.
It may be performed in the reproducing system of the video tape recorder.

The reproduction system of the video tape recorder shown in FIG. 23 is a superposition processing unit to which a reproduction video signal obtained by a reproduction signal processing circuit 23 to which a reproduction head 22 for scanning a recording track of the video tape 21 is connected is supplied. The superimposing processing unit 24 outputs a reproduced video signal in which the copyright information S ₁ and the generation information S ₂ are superposed as copy protection information.

The superposition processing section 24 includes a copy protection information detection section 25 for detecting copy protection information superposed on the reproduced video signal obtained by the reproduction signal processing circuit 23.
Based on the copy protection information detected by 5,
The control unit 26 generates new copy protection information, and the new copy protection information is encoded by the encoder 27.
Then, the copyright information S ₁ and the generation information S ₂ are converted into the copyright information S ₁ and the generation information S ₂ , and the copyright information S ₁ and the generation information S ₂ are superposed on the reproduced video signal by the superposition circuit 28 as copy protection information.

In addition, the control unit 26 generates copy protection information based on the copy protection information detected by the copy protection information detection unit 25 according to the procedure shown in the flowchart of FIG. Is supposed to do.

That is, the control unit 26 first determines in step 1 whether or not there is a copyright and the copy generation based on the copy protection information. When the result of judgment in Step 1 without copyright shifts to the step 2, copyright information S ₁ and S ₂ = 0 or S in S ₁ = 0
_The copy protection information that causes the encoder 27 to output the generation information S ₂ of ₂ = 1 is generated.

If the result of the determination in step 1 is that there is a copyright and the number of copyable generations is 1, the process proceeds to step 3 and the copyright information S ₁ and S ₂ = 0 with S ₁ = 1.
The copy protection information that causes the encoder 27 to output the generation information S ₂ is generated.

Furthermore, if the result of the determination in step 1 above is that there is copyright and the number of copyable generations is 0,
Moving to step 4, the copyright information S ₁ = 1 and S ₁ = S ₂ =
The copy protection information that causes the encoder 27 to output the first generation information S ₂ is generated.

In the video tape recorder equipped with such a reproducing system, the copyright information is reproduced in a section other than the effective video section displayed on the screen by the superposition processing section 24 for the reproduced video signal reproduced from the video tape 21. It is possible to output a reproduced image signal in which S ₁ and generation information S ₂ are superimposed, and it is possible to limit generation when recording the reproduced video signal with the video tape recorder having the recording system as described above.

Further, in each of the above-mentioned embodiments, the generation information S _{2 is set} to 1 on the assumption of the SCMS which restricts the copy of only one generation.
Although the number of bits is set as the number of bits, the generation information S ₂ may be set to have a number of bits to limit generation so that copying can be performed for a plurality of generations.

For example, as in the eighth embodiment shown in FIG. 25, it is superimposed on the 20th line (the 20th line of the odd field) and the 283rd line (the 20th line of the even field) of the NTSC video signal. Video ID
1 bit copyright information S ₁
And the 2-bit generation information S ₂ may be transmitted.

The video ID is, as shown in FIG.
Wide ID (2-bit data A), mode number (4-bit data B), data or flag (8-bit data C)
And an error check code (6 bit data D).

The wide ID (2-bit data A) is identification information regarding the transmission format of the video signal, and has a transmission aspect ratio of 16: 16 as shown in Table 2 below.
The first bit indicates whether it is 9 or 4: 3, and the second bit indicates whether the image display format is the letterbox format or the standard format.

[0063]

[Table 2]

The mode number (4 bit data B) is identification information for classifying the data or flag (8 bit data C) into 16 types of data, and as shown in Table 3 below, Define as flags and date / time data.

[0065]

[Table 3]

That is, the mode number is [000
0] indicates that the 8-bit data C is a system flag, and when [0001] indicates that the 8-bit data C is the year value of the date at the time of shooting. Show. Similarly, [1100] indicates the start of the character string, [1101] indicates that the 8-bit data C is character data, and [1110] indicates the end of the character string. Thereby, character information such as a program title can be recorded and transmitted.

Also, the above mode number

Defined in [0000]
The above 8-bit data C, that is, the system flag
Indicates the image status, as shown in Table 4 below.
Bit 0 is copyright information S₁ Assigned to
1 and bit 2 are generation information S ₂ Assigned to
Assigned to the information indicating whether or not the video 3 is a stereoscopic (3D) image.
In addition, bit 7 is the subtitle in the black area of the letterbox.
Is assigned to the information indicating whether or not there is.

[0068]

[Table 4]

Here, the information assigned to the bit 3 is a stereoscopic image obtained by recording an image having a left-right parallax between an odd field and an even field, and switching the odd field and the even field with a liquid crystal shutter or the like during reproduction. It is used to control the viewing 3D mode. In addition, the information assigned to bit 7 is that if the subtitle is in the black area of the letterbox, the subtitle disappears when you zoom on a screen with a wide aspect ratio, so do not zoom or slice the subtitle in the black area. , Is used to perform control such as displaying in other areas.

The copyright information S ₁ assigned to the bit 0 indicates the presence / absence of copyright by "1/0". Further, as shown in Table 5, the generation information S ₂ assigned to the bit 1 and the bit 2 indicates the number of generations [3] that can be copied at S ₂ = 11, and S ₂ = 10. The number of copyable generations [2], the number of copyable generations [1] at S ₂ = 01, and S ₂ = 00.
Indicates the number of generations that can be copied, “0”.

[0071]

[Table 5]

In the eighth embodiment, the copy generation restriction as shown in Table 6 can be performed by using the 1-bit copyright information S ₁ and the 2-bit generation information S ₂ .

[0073]

[Table 6]

That is, for example, as shown in FIG. 27, when the copyright information S ₁ = 0 indicating no copyright is superimposed on the video signal supplied from the video source 30, the generation information S ₂ is 00. , 01, 10 or 11, the recording of the video signal by the first video tape recorder 31 is permitted, and the video is recorded from the recorded video tape on which the video signal is recorded to another video tape. Signal dubbing, that is, copying of the video signal from the first video tape recorder 31 to the second video tape recorder 32, and the second video tape recorder 32.
It is also possible to permit copying of the above video signal from the video signal to the third video tape recorder 33.

Further, as shown in FIG. 28, for example, the copyright information S ₁ = 1 indicating that there is a copyright in the video signal supplied from the video source 30 and the number of copyable generations are

When the generation information S ₂ = 00 indicating that it is [0] is superimposed, the first video tape recorder 31 is prohibited from recording the video signal on the video tape.

Further, as shown in FIG. 29, for example, the copyright information S ₁ = 1 indicating that the video signal supplied from the video source 30 has the copyright and the generation indicating that the number of copyable generations is [1] When the information S ₂ = 01 is superimposed, the first video tape recorder 31 permits the video signal to be recorded on the video tape.

In the first video tape recorder 31, the copyright information S ₁ = 1 indicating that there is a copyright and the copyable generation number are decremented to obtain the copyable generation number.

The generation information S ₂ = 00 indicating [0] is superimposed on the video signal, and the copyright information S ₁ and the generation information S ₂ are recorded on the video tape together with the video signal. When the video signal recorded by the first video tape recorder 31 is reproduced, the reproduced video signal includes copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations.

Since the generation information S ₂ = 00 indicating that it is [0] is superimposed, dubbing of the video signal from the recorded video tape recording the video signal to another video tape, that is, the first video tape recorder. Copying of the video signal from 31 to the second video tape recorder 32 is prohibited.

That is, by superimposing the copyright information S ₁ = 1 indicating that there is a copyright and the generation information S ₂ = 0 1 indicating that the number of copyable generations is [1] on the video signal, It is possible to perform a generation restriction that permits copying of only one generation and prohibits copying of two or more generations.

Further, as shown in FIG. 30, for example, the copyright information S ₁ = 1 indicating that the video signal supplied from the video source 30 has the copyright and the generation indicating that the number of copyable generations is [2] When the information S ₂ = 10 is superimposed, the first video tape recorder 31 permits the video signal to be recorded on the video tape.

In the first video tape recorder 31, the copyright information S ₁ = 1 indicating that there is a copyright and the copyable generation number are decremented to indicate that the copyable generation number is [1]. ₂ [01] is superimposed on the video signal, and the copyright information S ₁ and the generation information S ₂ are recorded on a video tape together with the video signal. When the video signal recorded by the first video tape recorder 31 is reproduced, the reproduced video signal includes copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations is [1]. Since the generation information S ₂ = 01 indicating that the video signal is present is superimposed, dubbing of the video signal from the recorded video tape recording the video signal to another video tape, that is, the first video tape recorder 31 to the second video tape Copying of the above video signal to the video tape recorder 32 is permitted.

In the second video tape recorder 32, the copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations are decremented to obtain the number of copyable generations.

Generation information S ₂ indicating that it is [0]

[00] is superimposed on the video signal, and the copyright information S ₁ and the generation information S ₂ are recorded on a video tape together with the video signal. When the video signal recorded by the second video tape recorder 32 is reproduced, the reproduced video signal contains copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations.

Since the generation information S ₂ = 00 indicating that it is [0] is superimposed, dubbing of the video signal from the recorded video tape recording the video signal to another video tape, that is, the second video tape recorder. Copying of the above video signal from 32 to the third video tape recorder 33 is prohibited.

That is, by superimposing the copyright information S ₁ = 1 indicating that there is a copyright and the generation information S ₂ = 10 indicating that the number of copyable generations is [2] on the video signal, It is possible to perform generation restriction that permits copying up to two generations and prohibits copying over three generations.

Further, as shown in FIG. 31, for example, copyright information S ₁ = 1 indicating that the video signal supplied from the video source 30 has a copyright and a generation indicating that the number of copyable generations is [3]. When the information S ₂ = 11 is superposed, the video signal is transferred to the first video tape recorder 31.
Permits recording on videotapes.

In the first video tape recorder 31, the copyright information S ₁ = 1 indicating that there is a copyright and the copyable generation number are decremented to indicate that the copyable generation number is [2]. ₂ [10] is superimposed on the video signal, and the copyright information S ₁ and the generation information S ₂ are recorded on a video tape together with the video signal. When the video signal recorded by the first video tape recorder 31 is reproduced, the reproduced video signal contains copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations is [2]. Since the generation information S ₂ = 10 indicating that the video signal is present is superimposed, dubbing of the video signal from the recorded video tape recording the video signal to another video tape, that is, the first video tape recorder 31 to the second video tape recorder Copying of the above video signal to the video tape recorder 32 is permitted.

In the second video tape recorder 32, the copyright information S ₁ = 1 indicating that there is a copyright and the copyable generation number are decremented to indicate that the copyable generation number is [1]. ₂ [01] is superimposed on the video signal, and the copyright information S ₁ and the generation information S ₂ are recorded on a video tape together with the video signal. When the video signal recorded by the second video tape recorder 32 is reproduced, the reproduced video signal has copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations is [1]. Since the generation information S ₂ = 01 indicating that the video signal is present is superimposed, dubbing of the video signal from the recorded video tape recording the video signal to another video tape, that is, the second video tape recorder 32 to the third video tape recorder Copying of the above video signal to the video tape recorder 33 is permitted.

In the third video tape recorder 33, the copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations are decremented to obtain the number of copyable generations.

The generation information S ₂ = 00 indicating [0] is superimposed on the video signal, and the copyright information S ₁ and the generation information S ₂ are recorded on the video tape together with the video signal. And the third
When the above video signal recorded by the video tape recorder 33 is reproduced, the reproduced video signal includes copyright information S ₁ = 1 indicating that there is a copyright and the number of copyable generations.

Since the generation information S ₂ = 00 indicating that it is [0] is superimposed, dubbing of the video signal from the recorded video tape recording the video signal to another video tape, that is, the third video tape recorder. Copying of the video signal from 33 to the fourth video tape recorder 34 is prohibited.

That is, by superimposing the copyright information S ₁ = 1 indicating that there is a copyright and the generation information S ₂ = 11 indicating that the number of copyable generations is [3] on the video signal, It is possible to perform a generation restriction that permits copying up to three generations and prohibits copying over four generations.

As described above, by making the generation information S ₂ multi-bit, it is possible to perform generation restriction that permits copying over a plurality of generations.

[0089]

According to the video signal transmission method of the present invention, a 20-bit digital signal is superimposed on the 20th line or the 283rd line which is a video section other than the effective video section for displaying an image on the screen, and the 20-bit digital signal is added. As the digital signal of, the 2-bit aspect information indicating the aspect ratio of the video signal, the 4-bit header information, the copyright information indicating whether or not there is a copyright, and the copyable generation being 1 or 0. , Which indicates that the header information includes the copyright information and the generation information at [0000], and transmits the copyright information and the generation information for each odd field and even field of the video signal. If the copyright information is [1] and the generation information is [1], a video signal for which copying is prohibited is transmitted. Enable / disable not only, it is possible to carry out a copy of the generation restriction. Further, in the video signal recording method according to the present invention, a 20-bit digital signal is superimposed on the 20th line or the 283rd line which is a video section other than the effective video section for displaying an image on the screen, and the video signal is recorded on the recording medium. A video signal recording method for recording, comprising:
As a bit digital signal, 2-bit aspect information indicating the aspect ratio of a video signal, 4-bit header information, copyright information indicating whether or not there is a copyright, and the copyable generation is 1 or 0. It is indicated that the header information includes the copyright information and the generation information at [0000], and the copyright information and the generation information are included in each odd field and even field of the video signal. When the inserted copyright information is [1] and the generation information is [1], a video signal for which copying is prohibited is recorded on the recording medium. Therefore, permission / prohibition of copying is simply performed depending on the presence or absence of copyright. Not only can copy generation be restricted. Further, according to the video signal recording method of the present invention, the 20th line or the 283rd line, which is a video section other than the effective video section in which an image is displayed on the screen, is displayed.
A 2-bit aspect information indicating the aspect ratio of a video signal, 4-bit header information, and copyright information indicating whether or not there is a copyright, by superimposing a bit digital signal and as the 20-bit digital signal. , And the generation information indicating that the copyable generation is 1 or 0, the header information indicates that the copyright information and the generation information are included in [0000], and the odd field and the even field of the video signal. A video signal recording method for recording a video signal in which the above copyright information and generation information are inserted into a recording medium for each, wherein the copyright information and the generation information included in the above 20-bit data are detected and detected. Based on the copyright information and the generation information, recording or prohibition of the video signal on the recording medium is selected, and the copyright information is [1] and the generation information is [1 Since prohibits recording to a recording medium the video signal is not only permission / prohibition of copying the presence or absence of copyright, it is possible to perform copy generation limitation.

In the video signal reproducing method according to the present invention, the 20th line or the 28th line which is a video section other than the effective video section for displaying an image on the screen of the video signal reproduced from the recording medium.
Superimpose a 20-bit digital signal on 3 lines,
As a 0-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, copyright information indicating whether or not there is a copyright, and copyable generation 1 or 0 The header information includes [0000], which indicates that the copyright information and the generation information are included. The copyright information and the generation information are included for each odd field and even field of the video signal. When the copyright information is [1] and the generation information is [1], a video signal for which copying is prohibited is output. Therefore, it is possible to simply permit / prohibit copying depending on the presence or absence of copyright. No, it is possible to limit the generation of copy.

In the video signal recording apparatus according to the present invention, a 20-bit digital signal is superimposed on the 20th line or the 283rd line which is a video section other than the effective video section for displaying an image on the screen, and the 20-bit digital signal is added. As a signal
2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, copyright information indicating whether or not there is a copyright, and generation information indicating that the copyable generation is 1 or 0. [0000] indicates that the header information includes the copyright information and the generation information, and insert processing means for inserting the copyright information and the generation information in every odd field and even field of the video signal. If the copyright information is [1] and the generation information is [1], a video signal for which copying is prohibited is recorded on the recording medium. Therefore, only permission / prohibition of copying depending on the presence or absence of copyright. Instead, copy generation can be restricted. Further, the video signal recording device according to the present invention is
A 20-bit digital signal is superimposed on the 20th line or the 283rd line, which is a video section other than the effective video section for displaying an image on the screen, and the 20-bit digital signal is a 2-bit digital signal indicating the aspect ratio of the video signal. The header information includes aspect information, 4-bit header information, copyright information indicating whether or not there is a copyright, and generation information indicating that the copyable generation is 1 or 0, and the header information is [0000]. In the video signal recording device for recording the video signal in which the copyright information and the generation information are inserted into the recording medium for each odd field and even field of the video signal. The information detecting means for detecting the copyright information and the generation information contained in the 20-bit data, and the author's information detected by the information detecting means. Recording control means for permitting or prohibiting recording of the video signal on the recording medium based on the copyright information and the generation information, and the recording control means, based on the detected copyright information and generation information If the permission or prohibition of the recording of the signal on the recording medium is selected, and the recording of the video signal on which the copyright information is [1] and the generation information is [1] on the recording medium is prohibited, it is simply performed. Depending on the presence or absence of the right, not only copy permission / prohibition but also copy generation restriction can be performed.

Further, in the video signal reproducing apparatus according to the present invention, a 20-bit digital signal is added to the 20th line or the 283rd line which is a video section other than the effective video section for displaying an image on the screen of the video signal reproduced from the recording medium. It is possible to copy the signal by superimposing the signal, and as the 20-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, and copyright information indicating whether or not there is a copyright. And the generation information indicating that the generation is 1 or 0, and the header information is [0000].
Indicates that the copyright information and the generation information are included, and an insertion processing unit that inserts the copyright information and the generation information for each odd field and even field of the video signal is provided, and the copyright information is [1]. When the generation information is [1], a video signal for which copying is prohibited is output. Therefore, not only permission / prohibition of copying but also copy generation restriction can be performed depending on the presence or absence of copyright.

[Brief description of drawings]

FIG. 1 is a waveform diagram of a video signal for explaining a first embodiment of a video signal transmission method according to the present invention.

FIG. 2 is a waveform diagram showing a superimposed state of copyright information in the first embodiment.

FIG. 3 is a waveform diagram showing a generation information superimposition state in the first embodiment.

FIG. 4 is a waveform diagram of a video signal for explaining the second embodiment of the video signal transmission method according to the present invention.

FIG. 5 is a waveform diagram showing a superimposed state of copyright information in the second embodiment.

FIG. 6 is a waveform diagram showing a superimposition state of generation information in the second embodiment.

FIG. 7 is a waveform diagram of a video signal for explaining a third embodiment of the video signal transmission method according to the present invention.

FIG. 8 is a waveform diagram showing a superimposed state of copyright information and generation information in the third embodiment.

FIG. 9 is a waveform diagram of a video signal for explaining a fourth embodiment of the video signal transmission method according to the present invention.

FIG. 10 is a waveform diagram showing a superimposed state of copyright information and generation information in the fourth embodiment.

FIG. 11 is a waveform chart showing another superimposed state of the copyright information and the generation information in the fourth embodiment.

FIG. 12 is a waveform diagram showing another superimposed state of copyright information and generation information in the fourth embodiment.

FIG. 13 is a waveform diagram of a video signal for explaining the fifth embodiment of the video signal transmission method according to the present invention.

FIG. 14 is a waveform diagram showing a superimposed state of copyright information and generation information in the fifth embodiment.

FIG. 15 is a waveform diagram of a video signal for explaining the sixth embodiment of the video signal transmission method according to the present invention.

FIG. 16 is a waveform diagram showing a superimposed state of copyright information and generation information in the sixth embodiment.

FIG. 17 is a waveform diagram showing an example of a superimposition state of copyright information and generation information on an HD video signal in the seventh embodiment of the video signal transmission method according to the present invention.

FIG. 18 is a block diagram for explaining how to use the copyright information and the generation information in the video signal transmission method according to the present invention.

FIG. 19 is a block diagram for explaining another usage mode of the copyright information and the generation information in the video signal transmission method according to the present invention.

FIG. 20 is a block diagram for explaining another usage mode of copyright information and generation information in the video signal transmission method according to the present invention.

FIG. 21 is a block diagram showing a configuration example of a video signal recording device according to the present invention.

FIG. 22 is a flowchart showing an operation of the control unit in the video signal recording device.

FIG. 23 is a block diagram showing an embodiment of a video signal reproducing device according to the present invention.

FIG. 24 is a flowchart showing an operation of a control unit in the video signal recording device.

FIG. 25 is a waveform diagram of a video signal for explaining an eighth embodiment of the video signal transmission method according to the present invention.

FIG. 26 is a waveform diagram showing a superimposed state of copyright information and generation information in the eighth embodiment.

FIG. 27 is a block diagram for explaining a usage mode of copyright information and generation information in the eighth embodiment.

FIG. 28 is a block diagram for explaining another usage mode of the copyright information and the generation information in the eighth embodiment.

FIG. 29 is a block diagram for explaining a usage mode of copyright information and generation information in the eighth embodiment.

FIG. 30 is a block diagram for explaining another usage mode of the copyright information and the generation information in the eighth embodiment.

FIG. 31 is a block diagram for explaining another usage mode of the copyright information and the generation information in the eighth embodiment.

[Explanation of symbols]

1,4 Television tuner, 2,3,5,6,8
Video tape recorder, 7 video disc player,
10, 24 Superimposition processing unit, 11 Recording signal processing circuit, 1
2 recording heads, 13, 21 video tapes, 14, 2
5 copy protection information detection section, 15, 26 control section, 16, 27 encoder, 17, 28 superposition circuit, 1
8 sync separation circuit, 19 timing generator, 2
0 decoder, 22 reproduction head, 23 reproduction signal processing circuit, 30 video source, 31, 32, 33 video tape recorder

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Tsuchiya 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Within Sony Corporation (56) References JP-A-4-60962 (JP, A) JP-A 6-350959 (JP, A) JP 63-87653 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04N 5/91-5/956 H04N 7/08-7 / 088 G11B 20/10-20/12

Claims (7)

(57) [Claims] 1. The 2nd to 20th line or the 283rd line which is a video section other than an effective video section for displaying an image on a screen.
A 0-bit digital signal is superimposed, and as the 20-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, and copyright information indicating whether or not there is a copyright. And the generation information indicating that the copyable generation is 1 or 0, the header information indicates that the copyright information and the generation information are included in [0000], and the odd field and the even field of the video signal are included. An image characterized by transmitting the copyright information and the generation information for each of them, and transmitting a video signal in which copying is prohibited when the copyright information is [1] and the generation information is [1]. Signal transmission method. 2. The 2nd to 20th line or the 283rd line which is a video section other than an effective video section for displaying an image on a screen.
A video signal recording method for recording a video signal on a recording medium by superimposing a 0-bit digital signal, wherein the 20-bit digital signal includes 2-bit aspect information indicating an aspect ratio of the video signal and 4-bit aspect information. The header information includes copyright information indicating whether or not there is a copyright, and generation information indicating that the copyable generation is 1 or 0. The header information is [0000] and the copyright information and It is indicated that the copyright information and generation information are inserted in every odd field and even field of the video signal, the copyright information is [1], and the generation information is [1].
The video signal recording method is characterized in that a video signal whose copying is prohibited is recorded on a recording medium. 3. A 20th line or a 283rd line which is a video section other than an effective video section for displaying an image on a screen.
A 0-bit digital signal is superimposed, and as the 20-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, and copyright information indicating whether or not there is a copyright. And generation information indicating that the copyable generation is 1 or 0,
[0000] indicates that the header information includes the copyright information and the generation information, and the video signal in which the copyright information and the generation information are inserted in each odd field and even field of the video signal is recorded on a recording medium. A video signal recording method for recording, wherein copyright information and generation information included in the 20-bit data are detected, and based on the detected copyright information and generation information, the video signal is recorded on a recording medium. Select permission or prohibition of recording, the copyright information is [1], and the generation information is [1].
And a video signal recording method for prohibiting recording of the video signal on a recording medium. 4. A video section other than an effective video section for displaying an image on a screen of a video signal reproduced from a recording medium.
A 20-bit digital signal is superimposed on the 0th line or the 283rd line, and as the 20-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, and copyright or copyright The header information includes copyright information indicating no right and generation information indicating that the copyable generation is 1 or 0.
000] indicates that the copyright information and the generation information are included, and the copyright information and the generation information are inserted in every odd field and even field of the video signal, and the copyright information is [1], The above generation information is [1]
The video signal reproducing method is characterized by outputting a video signal whose copying is prohibited. 5. The 2nd to 20th line or the 283rd line which is a video section other than the effective video section for displaying an image on the screen.
A 0-bit digital signal is superimposed, and as the 20-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, and copyright information indicating whether or not there is a copyright. And generation information indicating that the copyable generation is 1 or 0,
[0000] indicates that the header information includes the copyright information and the generation information. The header information includes an insertion processing unit that inserts the copyright information and the generation information in every odd field and even field of the video signal. The copyright information is [1] and the generation information is [1].
The video signal recording apparatus is characterized in that a video signal whose copying is prohibited is recorded on a recording medium. 6. A 20th line or a 283rd line which is a video section other than an effective video section for displaying an image on a screen.
A 0-bit digital signal is superimposed, and as the 20-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, and copyright information indicating whether or not there is a copyright. And generation information indicating that the copyable generation is 1 or 0,
[0000] indicates that the header information includes the copyright information and the generation information, and the video signal in which the copyright information and the generation information are inserted in each odd field and even field of the video signal is recorded on a recording medium. A video signal recording device for recording, based on information detecting means for detecting copyright information and generation information contained in the 20-bit data, and copyright information and generation information detected by the information detecting means. A recording control means for permitting or prohibiting the recording of the video signal on the recording medium, the recording control means for recording the video signal on the recording medium based on the detected copyright information and generation information. Video signal recording characterized by selecting permission or prohibition, and prohibiting recording of a video signal whose copyright information is [1] and said generation information is [1] on a recording medium Location. 7. A second video section other than an effective video section for displaying an image on a screen of a video signal reproduced from a recording medium.
A 20-bit digital signal is superimposed on the 0th line or the 283rd line, and as the 20-bit digital signal, 2-bit aspect information indicating the aspect ratio of the video signal, 4-bit header information, and copyright or copyright The header information includes copyright information indicating no right and generation information indicating that the copyable generation is 1 or 0.
[000] indicates that the copyright information and the generation information are included, and an insertion processing unit that inserts the copyright information and the generation information into each of the odd field and the even field of the video signal is provided. 1] and the generation information is [1]
The video signal reproducing device is characterized by outputting a video signal whose copying is prohibited.