JP3166346B2 - Video additional information transmission method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates is related to video additional information transmission method for adding the ID data in the vertical blanking interval of the video signal, ID de recorded in the particular recording medium
Data from outside to perform signal processing
I have.

[0002]

2. Description of the Related Art Conventionally, a video signal is separated into a color signal, a luminance signal, and the like, and is magnetically separated by a recording device such as a camcorder or a VCR.
The recorded signal is recorded on a recording medium such as a tape, and is reproduced as a video by reproducing the recorded signal on a screen of a television receiver or a monitor device. In some cases, information such as the date and time associated with the video signal is transmitted together with the video signal as ID data to be displayed on a screen.

[0003]

However, in order to transmit such ID data to an external medium, it is necessary to use an ID data transmission connection cable or the like. Also in case of storing in the recording medium together with the video information has been can be recorded as a subcode to another area of the recording medium, there is no means for transmitting the ID data, for example recording
Even when dubbing was performed between media , the ID data could not be transmitted.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. B
LK signal addition encoder and / or A BLK signal decoder is provided and the V.V. Required for playback in BLK section
The ID data is encoded and added, and the ID data is recorded / transmitted on a recording medium together with the video signal , and reproduced based on the result of querying the ID at the time of reproduction.
Signal processing is performed .

[0005]

[Function] Especially concerning reproduction of video recorded on a recording medium
If it is possible to transmit data and control data and recording data of equipment that reproduces the recording medium with video signals
Both match the ID data and the data for inquiry during playback
By treatment of the to play signal to determine is performed Unisuru.

[0006]

BRIEF DESCRIPTION an overview of various embodiments of the image additional information transmission method related to the present invention. FIG. 1 (a)-
(D) shows a signal addition encoder E (hereinafter simply referred to as an encoder) for a camcorder, a VCR, a television receiver, or the like;
FIG. 3 is a diagram showing an outline in a case where a signal detection decoder D (hereinafter, simply referred to as a decoder) is provided. FIG. 1A shows an outline of a case in which an encoder E is provided in a camcorder. In this case, ID data such as date and time and temperature at the time of shooting by a user are recorded together with video signals on a video tape T during a vertical blanking period. Can be recorded.

FIG. 1B is a diagram schematically showing a case where an encoder E and a decoder D are provided in a VCR. In this case, at the time of recording, the encoder E adds ID data to the vertical blanking period of the video signal and records it on the video tape T. At the time of reproduction, the decoder D extracts the ID data added to the vertical blanking period. Various controls, provision of information to a user, and the like can be performed.

[0008] Then, as shown in FIG.
By providing the television receiver with the decoder D,
ID data added to the vertical blanking period of the video signal input from the VCR described with reference to FIG. 1B is extracted, and based on the ID data, for example, aspect conversion, letterbox, letterbox size, etc. Screen control such as screen format and panning information can be automatically performed.

Further, as shown in FIG. 1D, it is also possible to input the ID data extracted by the decoder D to, for example, an air conditioner, a lighting device or the like to perform various controls.

A specific example of a system using the video additional information transmission system of the present invention will be described below. FIG. 2A is a diagram showing an example in which ID data is added to a vertical blanking period when shooting is performed by a television camera-integrated camcorder. In this figure, 1 is a camera block, 2 is a pressure sensor for observing water pressure and the like, 3 is a global positioning system (GPS) for measuring radial latitude, altitude, 4 is a weather sensor,
Reference numeral 5 denotes a weather observation device for observing temperature, humidity, pressure, weather, rainfall, snowfall, and the like, and supplies weather data.

Reference numeral 6 denotes a keyboard for inputting data and the like, which externally supplies data such as a photographing location, a diameter and latitude, an altitude, and a depth to the camcorder. C indicates a built-in timer and supplies data of the date, time, and time at the time of shooting.
The supplied data are added by the encoder E during the vertical blanking period and are recorded on the video tape T together with the video signal.

[0012] In this case, since the respective data obtained when the image was captured by the camcorder is recorded simultaneously with the video, the situation at that time can be confirmed at the time of reproduction, and it is effective for observation of living things, weather, astronomical objects, and the like. Can be used. When photographing a child's growth record, data such as age, height, and weight at the time of photographing can be recorded on the videotape T together with the video using the keyboard 6.

FIG. 2B is a diagram showing an example in which an encoder E is provided in a VCR and used in a medical institution such as a hospital. In the figure, the same reference numerals as those in FIG. 2A denote the same parts, 7 denotes a medical viewing device, and X denotes an X-ray camera. For example, in a certain examination, the medical monitoring device 7 can simultaneously record examination data on the patient's body temperature, pulse, respiration, blood pressure, etc. on the video tape T while photographing the patient with the X-ray camera X.

FIG. 3 is a diagram showing an example of recording a program name, a channel name, and the like during a vertical blanking period using a VCR. In this figure, reference numeral 8 denotes a tuner for selecting a broadcast radio wave, 9 denotes a teletext decoder, and M denotes a control microcomputer.

When managing the recorded contents of the video tape T or searching for the contents, data such as a program title, a program name, a channel name, a broadcast station name, and a broadcast date are transmitted via the encoder E. In addition, by adding the image to the vertical blanking period at the same time as the video and storing it, it is possible to refer to or search for the title of the program, the name of the broadcast station, etc. at any time during the reproduction of the video tape T.

FIG. 4 is a diagram showing an example of recording a reception state such as an electric field intensity, an antenna level, a C / N ratio, and a ghost during a vertical blanking period using a VCR. In this figure 8
3 is a tuner for selecting a broadcast radio wave as in FIG. 3, 10 is an electric field strength meter, and 11 is a ghost amount detector.

When recording a broadcast program, the data of the reception status is added to the vertical blanking period via the encoder E, so that when the program is reproduced, the video tape T is bad if the video is disturbed or the like. Or the reception status is bad.

The ghost canceling control signal is transmitted on a broadcast radio wave,
Cannot be recorded because of its narrow frequency band. Therefore, by encoding and recording the tap coefficient of the ghost removal filter and the like during the vertical blanking period via the encoder E, the ghost can be canceled by the tap coefficient and the like at the time of reproduction.

FIG. 5A is a diagram showing an example of recording index information such as a position, a remaining tape amount, and a time code on a video tape. At the time of recording, the microcomputer M adds the index information (position, remaining tape amount, time code, etc.) of the video tape T to the vertical blanking period via the encoder E and records it on the video tape T, and at the time of reproduction, the index information is decoded. D extracts the microcomputer M
Performs control for performing the search start.

As shown in FIG. 5B, an arbitrary scene of the video recorded on the video tape, for example, V1 to V6 is compressed as it is to form one video data VR. By recording in the vertical blanking period, it is possible to search the entire video tape using the recorded video as an index.

Next, the recording of the ID of the property (S signal, composite signal) of the recording signal will be described with reference to FIGS. 6 (a) to 6 (f). In these figures, Y1 and Y2 are luminance signal processing units, C1 and C2 are chrominance signal processing units, S is a Y / C separation circuit,
F indicates a YX filter.

The video signal is processed by dividing it into a Y signal and a C signal. When the input of the video signal is a composite signal, as shown in FIG. After the separation of the luminance signal and the chrominance signal in S, the luminance signal is processed and recorded by the luminance signal processing unit Y1 and the color signal processing unit C1. However, if a chroma signal component remains in the luminance signal, a beat may be generated.
As shown in (b), the band of the luminance signal is limited by the YX filter F to remove the chroma signal component.

On the other hand, as shown in FIGS. 6 (c) and 6 (d), when the input of the video signal is S input, the luminance signal and the chroma signal are separated and input, so that the chroma signal component is included in the luminance signal. It does not remain, and there is no need to provide the YX filter F during reproduction.

Therefore, as shown in FIG. 6E, SW1 and SW2 are switched under the control of the microcomputer M at the time of recording, and information indicating whether the signal is an S signal or a composite signal is added by the encoder E, and at the time of reproduction, FIG. ), The decoder D extracts the additional information and switches SW3. In the case of the S signal input, the decoder D passes the YX filter F.

Next, recording of field, frame, sequence information, and phase information at the time of sub-sampling will be described. FIG. 7 shows MUSE (Multipul Sub-nyquist sampling).
FIG. 4 is a diagram showing a sub-sampling pattern of an encoding method. When discriminating the first field / second field of a video signal from, for example, a difference in waveform of an equalizing pulse portion, it is difficult to avoid erroneous discrimination with a non-standard signal such as variable speed reproduction. Therefore, by adding the field information of the video signal during the vertical blanking period, the determination becomes easy.

As shown in FIG. 7, when the transmission band is compressed by sub-sampling as in the MUSE system, as shown in FIG. Is done by changing In this case, by adding the phase information of each field to the vertical blanking period, resampling can be easily performed according to the phase information at the time of reproduction or demodulation.

Next, a case where virtual reality effect information is recorded will be described with reference to FIG. In this figure, H is a master tape, I is a slave tape, C is a console for inputting virtual reality effect information, and E is an encoder. The virtual reality effect is an effect for simulating a viewer's environment, such as wind direction, wind speed, acceleration, temperature and humidity, inclination, lighting, and the like, to obtain a sense of reality.

The air conditioner is controlled in accordance with the temperature of the room where the viewer is present according to the scene of the movie or the like being watched. For example, the temperature is reduced in the snow scene, the temperature is increased in the Hawaii scene, and the image of the roller coaster is displayed. Adding the acceleration increases the sense of realism. Since these virtual reality effects are linked to the video, the control data needs to be stored on the video tape in synchronization with the video.

Conventionally, it has been necessary to record such information in a data recorder or the like and link it with a VCR. However, as shown, at the stage of manufacturing the slave tape I from the master tape H, the virtual reality effect information is added from the console C via the encoder E to the vertical blanking period. Extract reality effect information,
The interlocking operation between the image of the projector P and the peripheral devices such as the air conditioner A, the lighting device L, the blower fans Fu, and the acceleration generator G is facilitated.

Also, by recording audio information such as surround, 3-1 format, and multi-sound simultaneously with the virtual reality effect information, it is possible to enjoy a realistic sound according to the scene of the video.

Next, recording of the variable speed reproduction flag will be described with reference to FIG. In this figure, T is a VCR video tape, E
Denotes an encoder, 12 denotes a video processing circuit provided in the television receiver, and D denotes a decoder.

In a television receiver, it is sometimes better to switch the characteristics of the deflection system and the AFC system when a video signal for variable speed reproduction of a VCR is input. For example, at the time of variable speed playback for the time axis fluctuation of vertical and horizontal frequency, the time constant is made relatively short,
It is desirable that the length be longer during normal reproduction.

Therefore, the encoder E provided in the VCR adds status information indicating whether normal reproduction or variable-speed reproduction is to be performed to the television receiver by adding it to the vertical blanking period, and outputs the result to the television receiver. -Da D
Then, by extracting the status information, judging between normal reproduction and variable speed reproduction and controlling the video processing circuit 12, the characteristics of the deflection system and the AFC system can be switched.

The time axis variation may vary depending on the type of media.
There is C characteristic. However, it is difficult for the television receiver to handle various media, and the parameters are set to compromises, so that the sense of stability of the image is impaired.

In this case, a time constant suitable for various media, A
By adding the FC characteristic parameter to the vertical blanking period, it becomes possible for the television receiver to set the optimal characteristic according to the parameter.

Next, recording of a flag for discriminating a standard signal or a non-standard signal will be described with reference to FIG. In this figure 13
Denotes a two-dimensional Y / C separation circuit, and 14 denotes a three-dimensional Y / C separation circuit.

In the case of the low-frequency conversion VCR, H, V
There is a case where there is no correlation between the phase and the frequency of the subcarrier. However, since the three-dimensional Y / C separation circuit is premised on the correlated signal, the Y / C separation may not be performed well, and it is necessary to determine whether the correlation exists. Therefore, conventionally, the Y / C separation process is performed by making the determination by the motion detector U and switching the switch SW.

In the present invention, a flag for discriminating between a standard signal and a non-standard signal is added to the vertical blanking period by an encoder E provided in the VCR, so that the flag is extracted by the decoder D and the standard signal or non-standard signal is extracted. The standard signal can be easily determined, and the switch SW is switched according to the determination result.
Y / C separation processing corresponding to each signal can be performed.

Next, recording of a flag for determining whether the video is a rental video will be described. FIG. 11A shows an outline of flag recording, FIG. 11B shows a VCR, and FIG.
Is a diagram showing an outline of detecting the flag in a television receiver, where H is a master tape, I is a slave tape, E is an encoder, T is a copy tape, 15, 1 and 1.
Reference numeral 6 denotes a video processing unit.

In the case of a rental video, the reproduction quality is not always good and noise is often noticeable. For example, when the user manually switches to a reproduction mode called a rental position or the like, the image quality is slightly softened during reproduction. , The noise canceller was applied deeply.

In this case, as shown in FIG. 11A, when the slave tape I is manufactured from the master tape H, the encoder E determines whether the video is a rental video during the vertical blanking period of the video signal. Record the flag. Then, a duplicate tape T on which the flag is recorded is manufactured from the slave tape I.

When reproducing the duplicated tape T, FIG.
As shown in FIGS. 1 (b) and 1 (c), the decoder D detects the flag of the tape, and if the flag is a rental video, the video signal circuits 15 and 16 automatically switch various image quality elements. , The noise canceller can be applied deeply.

In addition, in order to prevent illegal dubbing, by recording a dubbing prohibition flag, it is possible to control so that dubbing cannot be performed when the decoder D detects the flag. .

Next, a description will be given of an example of the state of the camcorder itself when photographing and recording with the camcorder, that is, an example in which data such as shutter speed is recorded and corrected during reproduction. 12 (a) and 12 (b) are diagrams showing the outline, where c is a camera block, E is an encoder, T is a video tape for recording and reproduction, D is a decoder, and 17 is data extracted by the decoder D. A reference numeral 18 denotes a video processing unit.

FIG. 12A shows data such as white balance data, aperture data, zoom ratio, focus data (distance measurement data), shutter speed, etc., and camera shake information data when photographing with a camcorder. As described above, the data is recorded on the video tape T by being added to the vertical blanking period by the encoder E. Then, at the time of reproduction, as shown in FIG. 12 (b), the data is extracted by the decoder D, the comparison operation unit 17 outputs correction data to the video processing unit 18,
Various corrections can be made.

Next, the determination of a three-dimensional (3D) image will be described. When the two images are taken at different positions, that is, the image viewed with the right eye and the image viewed with the left eye are shifted, and the respective images are viewed with both right and left eyes using dedicated glasses or the like, a stereoscopic effect can be obtained. In this case, a three-dimensional effect is obtained by holding an inter-frame hold of each field signal using a liquid crystal shutter or a liquid crystal display at the time of reproduction, and displaying an image that is shifted at the time of shooting.

FIGS. 13A and 13B are diagrams showing waveforms of sample and hold pulses of a normal image and a stereoscopic image.
As shown in FIG. 13A, the sample and hold pulses of each field of the normal image are synchronized in phase, but the sample and hold pulses of each field of the stereoscopic image are shown in FIG. 13B. Thus, when trying to view a stereoscopic image because of the phase shift, it is necessary to detect whether or not the video on the video tape is a stereoscopic image and switch the sample hold pulse. Therefore, by adding a flag for determining whether or not the phase is shifted for each field to the vertical blanking section, the identification is facilitated.

FIG. 14 is a diagram showing a part of a circuit block when a sample hold pulse is identified and output. In this figure, 19L and 19R are liquid crystal display elements, 20L
, 20R denotes a liquid crystal driver hold circuit, 21 denotes a pulse generator, and D denotes a decoder.

By adding a flag for discriminating between the image viewed by the right eye and the image viewed by the left eye, that is, the first field / second field, to the vertical blanking interval, the decoder D extracts the flag from the video signal during reproduction. First
The field / second field is determined. In accordance with the discrimination result, the pulse generator 21 supplies the left and right liquid crystal driver hold circuits 20L and 20R to each other as shown in FIG.
By outputting the sample and hold pulse at the timing of the waveform shown in (b) and driving the liquid crystal display elements 19L and 19R, a stereoscopic image can be obtained.

Next, an example in which an encryption code, a security code, and the like are added to the vertical blanking period will be described. FIG. 15 is a diagram showing the outline thereof, in which D is a decoder, 22 is a video processing unit, and M is a microcomputer, which performs an inquiry of a password or a keyword input from a password input device 24 and the like. 2
Reference numeral 3 denotes a mute circuit for muting an image when the password, the keyword and the like are not collated.

Recently, there are a lot of software such as violence, adults, etc. which are not desired to be shown to children. In this case, it is desirable that an ID code such as an encryption code or a security code be added to the vertical blanking period and recorded on the tape so that only a specific user can see it.

Therefore, in a normal reproduction operation, such software is applied so that the video is not output by the mute circuit 23, and the ID code is extracted by the decoder D at the time of reproduction, and the microcomputer M inputs the ID code and the password. Inquiry of the personal identification number, keyword, and the like input by the device 24 is performed. Then, the video can be output only when the password, the keyword, and the like match the ID code. If the password and the keyword are not collated, the video may be muted as described above, or a message may be output on a blue screen.

FIG. 16 shows an outline of V.ID data applicable to the present invention.
It is a waveform diagram at the time of inserting additional information as 20-bit data using the 0th line and the 283rd line. In this figure, reference numeral 25 denotes a horizontal synchronizing signal, reference numeral 26 denotes a color burst signal, reference numeral 27 denotes a reference signal, and 20-bit additional information is provided after the reference signal 27. This data includes CRCC (Cyclie Redundanc)
y Check code) and ID code and I
It is preferable to determine a signal other than the D code. The above explanation uses magnetic tape (video tape) as an example.
However, other recording media such as disks can be used in the same way.
It is something.

[0054]

As described above, according to the video additional information transmission system of the present invention, the vertical blanking of the input video signal is performed.
During the horizontal video period at a predetermined position in the period,
ID data related to the playback of the video signal
Recorded, recorded on a recording medium, and played back on this recording medium.
Demodulates the ID data by a decoder when
ID data and input related to the reproduction included in the demodulated output
When it is determined that the entered ID for inquiry matches
The video signal output from the recording medium is reproduced.
For example, recording that can be recorded and played back
When there is an input queried with a specific ID for the medium,
An effect such as being able to output a reproduced video signal is produced.Also , since various data or information can be added to a vertical blanking period, that is, a part of the video signal and recorded on a recording medium, another No need for control transmission lines
Transmitted to another recording medium or recording / reproducing device, etc.
Signal processing can be performed according to the ID information
An effect called.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a video additional transmission system according to the present invention.

FIG. 2 is an explanatory diagram of data recording at the time of shooting and recording.

FIG. 3 is an explanatory diagram of recording of recorded program data.

FIG. 4 is an explanatory diagram of recording of reception status data.

FIG. 5 is an explanatory diagram of index information recording on a video tape.

FIG. 6 shows properties of a recording signal (S signal, composite signal)
FIG. 4 is an explanatory diagram of information recording.

FIG. 7 is an explanatory diagram of recording of phase information at the time of sub-sampling.

FIG. 8 is an explanatory diagram of recording virtual reality effect information.

FIG. 9 is an explanatory diagram of recording of a determination flag for variable speed reproduction of a VCR.

FIG. 10 is an explanatory diagram of recording of a determination flag of a standard signal / non-standard signal.

FIG. 11 is an explanatory diagram of rental video information recording.

FIG. 12 is an explanatory diagram of recording of state data of a video camera at the time of shooting.

FIG. 13 is a waveform diagram of a sample hold pulse.

FIG. 14 is a diagram illustrating a part of a circuit block for obtaining a stereoscopic (3D) image.

FIG. 15 is an explanatory diagram of recording special ID information.

FIG. 16 is a diagram showing an example of a waveform diagram when additional information is inserted.

[Explanation of symbols]

 E Data encoder D Data decoder

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 5/76-5/956 G11B 20/10-20/12

Claims (1)

(57) [Claims] To 1. A within a horizontal picture period at a predetermined position in a vertical blanking period of the input video signal, recorded on the recording medium the ID data about the reproduction of the input video signal is recorded via the encoder When reproducing the recording medium, the ID data is demodulated by a decoder, and the ID data relating to the reproduction included in the demodulated output and the input are demodulated.
When it is determined that the entered ID for inquiry matches
Video additional information transmission method, wherein was Unishi by reproducing the video signal output from the serial recording medium.