JPH10326480A - Device and method for image signal recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate intermittent images which allows to understand the outline of the content of broadcasting at the time of recording broadcast image signals. SOLUTION: This device 1 records inputted image signals into a recording medium 15. At such a time a supplemented information detecting circuit 16 detects the supplement information included in the subcode of the inputted image signals, vertical fly-back period, etc. A characteristic amount detecting circuit 17 detects the characteristic amount indicating the amount of movement of an image signal and the presence of a telop, etc. A thinning-out processing circuit 18 records inputted image signals to the recording medium 15 after thinning a specified amount of inputted image signals out based on the control of a system controller 20, which seeks for the above-stated supplement information and a typical picture corresponding to the characteristic amount to cause the thinning-out processing circuit 18 to record this typical picture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal recording apparatus and a video signal recording method for recording a video signal such as a television broadcast and a digital satellite broadcast, and more particularly, to grasping the outline of the video signal to be recorded. The present invention relates to a video signal recording device for recording an intermittent video and a video signal recording method.

[0002]

2. Description of the Related Art In recent years, recording media such as optical disks, hard disks, and digital video tapes for recording video signals broadcasted by television broadcasting or digital satellite broadcasting are:
The storage capacity is on the order of several megabytes to several tens of gigabytes, and the capacity is increasing. Therefore, such a large-capacity recording medium enables continuous recording of a television broadcast or the like for a long time such as several hours to several tens of hours.

[0003]

By the way, when recording a television broadcast or the like using such a recording medium, the recording capacity is very large. Cannot confirm all contents. Therefore, in the case of recording a television broadcast or the like using such a large-capacity recording medium, a function for confirming the outline of the recorded contents, information on the recording position of each program, and the like is required.

[0004] However, it has been very difficult to confirm the outline of the content of the video signal recorded on the recording medium in the related art. For example, in order to confirm the outline of the content recorded on the recording medium, an interval reproduction in which a reproduction point is skipped at regular time intervals can be considered. In this interval reproduction, regardless of the information content of the recorded video signal, Playback is performed, and the contents are difficult to understand.

[0005] The present invention has been made in view of such circumstances, and when a broadcasted video signal is recorded on a recording medium, an intermittent video is generated which allows an outline of the recorded content to be grasped. It is an object to provide a video signal recording device and a video signal recording method.

[0006]

In order to solve the above-mentioned problems, a video signal recording apparatus according to the present invention reproduces a moving image from a broadcasted video signal and intermittently displays a representative screen from the reproduced moving image. Detecting means for detecting the additional information of the broadcast video signal; controlling means for controlling the intermittent interval of the representative screen detected by the detecting means according to the additional information; Recording means for recording the representative screen on a recording medium.

In this video signal recording device, a representative screen is detected according to the additional information, and an intermittent video signal is recorded.

A video signal recording apparatus according to the present invention reproduces a moving image from a broadcasted video signal and detects a representative screen intermittently from the reproduced moving image, and features of the broadcasted video signal. The image processing apparatus includes a feature amount detecting unit that detects an amount, a control unit that controls an intermittent interval of a representative screen detected by the detecting unit according to the feature amount, and a recording unit that records the representative screen on a recording medium.

In this video signal recording apparatus, a representative screen is detected in accordance with the characteristic amount and an intermittent video signal is recorded.

A video signal recording apparatus according to the present invention reproduces a moving image from a broadcasted video signal, and detects a representative screen intermittently from the reproduced moving image, and adds the broadcasted video signal. Additional information reproducing means for reproducing information;
A feature value detecting unit that detects a feature value of the broadcasted video signal; a control unit that controls an intermittent interval of a representative screen detected by the detecting device in accordance with the additional information and the feature value; Recording means for recording on a recording medium.

In this video signal recording apparatus, a representative screen is detected in accordance with the additional information and the characteristic amount, and an intermittent video signal is recorded.

A video signal recording method according to the present invention reproduces a moving image from a broadcasted video signal, reproduces additional information of the broadcasted video signal, and performs intermittent representative screen detection in accordance with the additional information. The representative screen is intermittently detected from the reproduced moving image by changing the interval, and the representative screen is recorded on a recording medium.

In this video signal recording method, a representative screen is detected according to the additional information and an intermittent video signal is recorded.

According to the video signal recording method of the present invention, a moving picture is reproduced from a broadcast video signal, the characteristic amount of the broadcast video signal is detected, and a representative screen intermittently detected in accordance with the characteristic amount. The representative screen is intermittently detected from the reproduced moving image by changing the interval, and the representative screen is recorded on a recording medium.

In this video signal recording method, a representative screen is detected in accordance with the characteristic amount and an intermittent video signal is recorded.

A video signal recording method according to the present invention reproduces a moving image from a broadcasted video signal, reproduces additional information of the broadcasted video signal, and detects a characteristic amount of the broadcasted video signal. Changing the intermittent interval of a representative screen to be detected according to the additional information and the feature amount, intermittently detecting the representative screen from the reproduced moving image, and recording the representative screen on a recording medium. .

In this video signal recording method, a representative screen is detected according to the additional information and the characteristic amount, and an intermittent video signal is recorded.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a video signal recording device according to an embodiment of the present invention will be described with reference to the drawings. The video signal recording apparatus according to this embodiment records a broadcast or transmitted video signal on a recording medium, detects a representative screen of the video signal, and generates an intermittent video by thinning out a video signal other than the representative screen. It is a device to do.

FIG. 1 shows a block diagram of a video signal recording apparatus according to an embodiment of the present invention.

The video signal recording apparatus 1 includes a video signal input processing circuit 2 to which an analog video signal broadcast or transmitted by wire is input, a camera signal input processing circuit 3 to which a transmission signal from a camera is input, A digital video signal input processing circuit 4 to which a broadcasted or transmitted digital video signal is input; a reception signal input processing circuit 5 to which a radio broadcasted video signal and audio signal are input; and a video signal input processing circuit 2 , A camera signal input processing circuit 3, a digital video signal input processing circuit 4, and a video signal switching circuit 6 for switching the video signal input processed by the reception signal input processing circuit 5, and a video for compressing the input video signal And a signal compression circuit 7.

The video signal recording apparatus 1 includes an audio signal input processing circuit 8 for receiving an analog audio signal broadcast or transmitted by wire, and a microphone signal input processing circuit 9 for receiving a transmission signal from a microphone. A digital audio signal input processing circuit 10 to which a broadcast or transmitted digital audio signal is input, an audio signal input processing circuit 8, a microphone signal input processing circuit 9, a digital audio signal input processing circuit 10, and a received signal An audio signal switching circuit 11 for switching an audio signal input processed by the input processing circuit 5, an audio signal detection processing circuit 12 for detecting an audio signal, and an audio signal compression circuit 1 for compressing an input audio signal.
3 is provided.

The video signal recording device 1 combines the video signal compressed by the video signal compression circuit 7 and the audio signal compressed by the audio signal compression circuit 13 to record the recording medium 1.
5 is provided with a recording processing circuit 14 for recording.

Further, an additional information detecting circuit 16 for detecting additional information of a broadcasted or transmitted video signal or additional information superimposed or added to each video signal, and a feature for detecting a characteristic amount of the video signal An amount detection circuit 17 and a thinning processing circuit 18 for detecting a representative screen and thinning other video signals are provided.

The video signal recording apparatus 1 stores a system controller 20 for controlling the thinning-out processing circuit 18 based on the additional information and the characteristic amount and for controlling each circuit, and data referred to by the system controller 20. The system includes a database 21 and an operation input processing circuit 22 for supplying operation input information to the system controller 20.

The video signal input processing circuit 2 receives, for example, an analog video signal broadcasted through a cable or a transmitted analog video signal. The video signal input processing circuit 2
The analog video signal is converted into a baseband video signal by demodulation or the like, and the baseband video signal is converted into a digital video signal and supplied to the video signal switching circuit 6.

The camera signal input processing circuit 3 receives, for example, a video signal captured by a video camera. If the video signal from the video camera is an analog signal, the camera signal input processing circuit 3 performs demodulation and the like to convert the video signal into a baseband video signal, and converts the baseband video signal into a digital video signal. It is supplied to the video signal switching circuit 6.
Further, if the video signal from the video camera is a digital signal, the camera signal input processing circuit 3 performs error correction, decoding processing such as expansion processing of the compressed signal, and supplies the video signal to the video signal switching circuit 6.

The digital video signal input processing circuit 4 receives, for example, a digitally transmitted video signal or a digitally broadcasted video signal. The digital video signal input processing circuit 4 performs processing such as demodulation of the input video signal, converts it into baseband digital data, performs error correction, decompresses a compressed signal, and performs video signal switching. Supply to circuit 6.

A video signal and an audio signal which are broadcast by radio and received by an antenna or the like are input to the reception signal input processing circuit 5. The received signal input processing circuit 5 performs processing such as demodulation of the received video signal, converts the received video signal into a baseband video signal, converts the baseband video signal into a digital video signal, and converts the baseband video signal into a digital video signal. To supply. Further, if the video signal is a digital signal, the video signal is subjected to decoding processing such as error correction and expansion processing of the compressed data, and is supplied to the video signal switching circuit 6. Also, the reception signal input processing circuit 5
Performs processing such as demodulation of a received audio signal, converts it into a baseband audio signal, converts this baseband audio signal into a digital audio signal, and converts the baseband audio signal into a digital audio signal.
To supply. Further, if the audio signal is a digital signal, the audio signal is subjected to decoding processing such as error correction and expansion processing of the compressed data, and is supplied to the audio signal switching circuit 11.

Digital video signals from the video signal input processing circuit 2, the camera signal input processing circuit 3, the digital video signal input processing circuit 4, and the received signal input processing circuit 5 are input to the video signal switching circuit 6. . At this time, the input video signal is, for example, a digital video signal of a color difference signal. The video signal switching circuit 6 includes a system controller 20
Based on the control, any one of the input video signals is selected and supplied to the video signal compression circuit 7, the additional information detection circuit 16, the feature amount detection circuit 17, and the thinning processing circuit 18.

The video signal compression circuit 7 receives a digital video signal from the video signal switching circuit 6 and an intermittent video signal from a thinning circuit 18 described later. The video signal compression circuit 7 converts one or both of the digital video signal from the video signal switching circuit 6 and the intermittent digital video signal from the thinning circuit 18 described later, for example, into MPEG2 (Movi).
ng Picture Experts Group 2) The data is compressed by the method or the like and supplied to the recording processing circuit 14. The audio signal input processing circuit 8 receives, for example, an analog audio signal broadcasted by a cable or a transmitted analog audio signal. The audio signal input processing circuit 8 converts the analog audio signal into a baseband audio signal by demodulating the analog audio signal, converts the baseband audio signal into a digital audio signal, and converts the analog audio signal into a digital audio signal.
To supply.

The microphone signal input processing circuit 9 receives, for example, an audio signal detected by a microphone. If the audio signal from the microphone is an analog signal, the microphone signal input processing circuit 9 converts the signal into a baseband audio signal by demodulation and the like, converts the baseband audio signal into a digital audio signal, and converts the audio into a digital audio signal. The signal is supplied to the signal switching circuit 11. If the audio signal from the microphone is a digital signal, the audio signal is supplied to the audio signal switching circuit 11 after performing error correction, decoding processing of decompression processing of the compressed signal, and the like.

The digital audio signal input processing circuit 10 includes:
For example, a digitally transmitted audio signal or a digitally broadcasted audio signal is input. The digital audio signal input processing circuit 10 performs processing such as demodulation of the input audio signal, converts the input audio signal into baseband digital data, performs error correction, decompresses the compressed signal, and performs audio signal switching. Supply to circuit 11.

The audio signal switching circuit 11 receives digital audio signals from the audio signal input processing circuit 8, the microphone signal input processing circuit 9, the digital audio signal input processing circuit 10, and the received signal input processing circuit 5. . The audio signal switching circuit 11 is controlled by the system controller 20 to
Any one of the input audio signals is selected and supplied to the audio signal detection processing circuit 12.

A digital audio signal from the audio signal switching circuit 11 is input to the audio signal detection processing circuit 12. The audio signal detection processing circuit 12 includes a system controller 20
Based on this control, an audio signal corresponding to the intermittent video signal after the video signal has been thinned out by a thinning processing circuit 18 described later is detected and supplied to the audio signal compression circuit 13. Alternatively, the audio signal detection processing circuit 12 supplies an audio signal corresponding to the intermittent video signal after the video signal has been thinned out by the thinning processing circuit 18 to the audio signal compression circuit 13 together with the input digital audio signal.

A digital audio signal from the audio signal detection processing circuit 12 is input to the audio signal compression circuit 13. The audio signal compression circuit 13 compresses the digital audio signal from the audio signal switching circuit 11 according to, for example, the MPEG2 method and supplies the compressed signal to the recording processing circuit 14. The digital video signal from the video signal compression circuit 7 and the digital audio signal from the audio signal compression circuit 13 are input to the recording processing circuit 14. The recording processing circuit 14 combines the digital video signal and the digital audio signal in a predetermined format, that is, according to the recording format of the recording medium 15. Also,
So-called FAT (File Allocation Table), TOC (T
It is generated in accordance with a recording medium that records file management information called “able of contents”, subcode, and the like, and is synthesized together with a digital video signal and a digital audio signal.
Note that the file management information and the like may be generated by the system controller 20 and recorded by the recording processing circuit 14 by synthesizing it with a video signal and the like. Then, the recording processing circuit 14
Modulates these video signals and the like to be recorded by a predetermined method, and performs processing such as addition of an error correction code to record the signals on the recording medium 15.

The recording medium 15 may be any recording medium such as a hard disk, a magnetic disk, a magneto-optical disk, and a memory card.

A digital video signal from the video signal switching circuit 6 is input to the additional information detection circuit 16. Further, the additional information supplied to the additional information detection circuit 16 is supplied together with the input video signal of the received signal from the antenna, the analog video signal, the camera signal, or the digital video signal. The additional information detection circuit 16 detects information other than the image data of the digital video signal, for example, information inserted in a vertical blanking period, pilot information, or additional information included in a header portion of the digital video signal. . Further, the additional information detection circuit 16 detects additional information supplied together with each input video signal. Details of the additional information will be described later.

A digital video signal from the video signal switching circuit 6 is input to the feature detection circuit 17. The feature amount detection circuit 17 detects a motion amount, a telop, and the like from the video signal, and outputs the detected motion amount, telop, and the like as a feature amount. The feature amount detection circuit 17 supplies the detected feature amount to the system controller 20. Details of this movement amount will be described later.

A digital video signal from the video signal switching circuit 6 is input to the thinning processing circuit 18. The thinning-out processing circuit 18 detects a representative screen from the supplied digital signal and generates an intermittent video signal in which images other than the representative screen are thinned out. The amount by which the video signal switching circuit 6 thins out images, that is, the interval between representative screens to be detected, is controlled by the system controller 20. The thinning processing circuit 18 supplies the generated intermittent video signal to the video signal compression circuit 7.

The system controller 20 is supplied with the additional information from the additional information detection circuit 16 and the feature quantity from the feature quantity detection circuit 17. The system controller 20
The representative screen detected by the thinning-out processing circuit 18 is controlled based on the input additional information and the feature amount. That is,
Controls the amount of thinning of the video signal.

The system controller 20 supplies an identification signal for identifying the representative screen to the recording processing circuit 14 in order to add a predetermined identification signal to the representative screen of the video signal detected by the video signal compression circuit 7. Recording processing circuit 14
Adds the identification signal to the video signal and records it on the recording medium 15.

The system controller 20 performs switching control processing of the video signal switching circuit 6 and the audio signal switching circuit 11. That is, the system controller 20 determines the types of the input video signal and audio signal, and performs this switching control process. Further, the system controller 20
Controls the audio signal detection processing circuit 12. That is,
The system controller 20 causes the audio signal detection processing circuit 12 to detect audio corresponding to the representative screen detected by the thinning processing circuit 18.

The system controller 20 is supplied with control information and the like from a database 21. The system controller 20 performs various controls based on the control information.

Operation input information from the operation input processing circuit 22 is supplied to the system controller 20.
The system controller 20 performs various controls based on the operation input information.

Next, the detection control of the above-described representative screen performed by the system controller 20 of the video signal recording apparatus 1 will be described with reference to flowcharts and the like.

FIG. 2 is a flowchart showing the contents of the control for detecting the representative screen performed by the system controller 20. The system controller 20 controls the video signal recording device 1
When the power supply or the like is input, the processing from step S1 is started. Unless otherwise indicated, the system controller 20 proceeds in the order of step numbers.
In step S1, the system controller 20
Initialize the controlled circuit.

In step S2, the system controller 20 determines whether or not there is an operation input from the operation input processing circuit 22. That is, in step S2, it is determined whether a representative screen is detected and an intermittent video is generated. The system controller 20 waits in step S2 until there is an operation input, and proceeds to step S3 when there is an operation input.

In step S3, the system controller 20 reads the additional information detected by the additional information detection circuit 16. At the same time, the system controller 20 reads the feature amount detected by the feature amount detection circuit 17. When a process that does not require either the additional information or the feature amount is performed in step S5 described later, a process of reading only the additional information or the feature amount is performed in step S3.

In step S4, the system controller 20 determines the contents of the process for detecting the representative screen. In step S4, for example, a process of selecting one process from a plurality of processes based on a user's operation input is performed. The specific contents of the plurality of processes will be described later in detail.

In step S5, the system controller 20 selects information necessary for the processing determined in step S4 from the acquired additional information and the characteristic amount. That is, the system controller 20 selects a specific parameter from the additional information and the characteristic amount, and uses the selected parameter later to determine the intermittent interval.

In step S6, the system controller 20 determines the intermittent interval of the video signal, which is the detection interval of the representative screen, based on the processing contents determined in step S4, and controls the thinning processing circuit 18.

In step S7, an identification signal is generated, and this identification signal is supplied to the recording processing circuit 4.

In step S8, the system controller 20 determines whether the additional information or the feature has been updated. When it is determined that the additional information or the feature amount has been updated, the processing from step S3 is repeated, and
If it is determined that the additional information or the feature has not been updated, the process proceeds to step S9.

In step S9, the system controller 20 determines whether the recording has been completed. If it is determined that the recording has not been completed, the processing from step S8 is repeated. That is, the system controller 20
Waits until the additional information or the feature value is updated in these steps S8 and S9 or the recording is completed. If it is determined that the recording has been completed, the system controller 20 ends the processing shown in this flowchart.

Next, specific examples of the above-described additional information and characteristic amounts will be given, and specific contents of the representative screen detection processing using these will be described.

Detection of representative screen when additional information is used
The additional information detected by the additional information detection circuit 16 includes, for example, a program genre, a broadcast time zone, a broadcast channel, and the like.

As a process of detecting the first representative screen using the additional information, the system controller 20 performs a process using the genre information of the program, that is, the information on the broadcast contents of the program. The system controller 20, as shown in FIG.
A process of detecting a representative screen is performed by changing a thinning rate between a case where a broadcasted program is a news program and a case where the broadcasted program is not a news program. When recording this news program, the recording is performed with a high thinning rate. This is a news program
This is because there are many explanations using voices and telops, and the contents can be understood even if the thinning rate is increased. Therefore,
The system controller 20 determines the content of the program to be broadcast based on the additional information, and in the case of a program such as a news program, which has many explanations by voice or telop, increases the thinning rate compared to other programs. To detect the representative screen.

As described above, the video signal recording device 1 can perform intermittent recording of the video signal suitable for the content of the program by changing the intermittent interval according to the program and detecting the representative screen. The contents can be grasped efficiently.

As a process of detecting the second representative screen using the additional information, the system controller 20 performs a process using the information on the broadcast time zone. As shown in FIG. 4, the system controller 20 performs processing for detecting a representative screen by changing a thinning rate between a case where a broadcasted program is a so-called golden time period with a high audience rating and a case other than that. I do. When recording a program broadcast during this golden time, a representative screen is detected with a thinning rate reduced compared to other time zones. Therefore, the system controller 20 determines the time slot of the program to be broadcast based on the additional information, and in the case of a time zone where the audience rating is generally high such as the time zone of the golden time, the system controller 20 compares the time slot with other time zones. To reduce the thinning rate to perform detection.

As described above, in the video signal recording apparatus 1, by intermittently changing the intermittent interval according to the broadcast time zone and detecting the representative screen, the video signal suitable for each time zone can be intermittently recorded. The content of the video signal can be grasped efficiently.

As a process of detecting the third representative screen using the additional information, the system controller 20 performs a process using the information of the broadcast channel. When there are a plurality of broadcast channels, that is, when there are a plurality of sources of broadcast video signals, for example, when there are three channels of an A channel, a B channel, and a C channel as shown in FIG. A process of detecting a representative screen by changing the thinning rate for each channel is performed. For example, a representative screen is detected at a high thinning rate when recording the B channel, a representative screen is detected at an intermediate thinning rate when recording the C channel, and a representative screen is detected at a low thinning rate when recording the A channel. Is detected.

As described above, the video signal recording apparatus 1 can perform intermittent recording of video signals suitable for each supply destination by detecting the representative screen by changing the intermittent interval according to the broadcast supply source. The content of the video signal can be grasped efficiently.

Detection Process of Representative Screen Using Feature Amounts The feature amounts detected by the feature amount detection circuit 17 include, for example, a video motion amount, that is, a motion vector between images, and a telop inserted in the screen. And the like.

As a first representative screen detection process using the feature amount, the system controller 20 performs a process using the motion amount of the video detected by the feature amount detection circuit 17. As shown in FIG. 6, the system controller 20 detects the representative screen at a low thinning rate when the broadcasted program is a sports program with a large amount of motion, and displays the representative screen at an intermediate thinning rate when the program is a drama or movie. The screen is detected, and in the case of a news program or the like, the representative screen is detected at a high thinning rate. In addition,
The motion amount of each program is determined not by using the instantaneous motion amount but by the motion amount obtained by averaging the motion amounts of a plurality of frames. The method of detecting the amount of motion by the feature amount detection processing circuit 17 is not particularly limited. Further, the detection may be performed using the motion amount added to the video signal.

The specific processing content of the detection processing of the first representative screen using the characteristic amount will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 7 corresponds to the process of step S6 in the process of FIG. 2 described above.

The system controller 20 reads the predetermined threshold values A and B from the database 21 in advance in step S1 shown in FIG. These thresholds are thresholds for setting the thinning rate based on the amount of motion of the video signal. The threshold A is a threshold indicating the upper limit of the amount of motion, and the threshold B is a threshold indicating the lower limit of the amount of motion. Therefore, the relation between the threshold A and the threshold B is such that the threshold A> the threshold B. In step S3 shown in FIG. 2, the system controller 20 determines the amount of motion of the video signal as the amount of characteristic.
7 beforehand. Note that the amount of motion here is not the amount of motion for each frame;
This is the average amount of motion of the video signal obtained by taking the average amount of motion over a certain period of time such as 0 frame.

First, in step S 11, the system controller 20 compares the average movement amount of the video signal read from the feature amount detection circuit 17 with the threshold value A. If the average motion amount is larger than the threshold A, the process proceeds to step S12. Then, in step S12, the thinning rate when the amount of motion is large is set, that is, set to a low thinning rate, and the process proceeds to step S16. If the average amount of motion is smaller than the threshold A in step S11, the process proceeds to step S13.

In step S 13, the system controller 20 compares the average motion amount of the video signal read from the feature amount detection circuit 17 with the threshold value B. If the average motion amount is smaller than the threshold B, the process proceeds to step S14. Then, in step S14, the thinning rate when the motion amount is intermediate is set, that is, the intermediate thinning rate is set, and the process proceeds to step S16. If the average amount of motion is smaller than the threshold B in step S13, step S15
Proceed to. Then, in step S15, the thinning rate when the amount of motion is large is set, that is, a high thinning rate is set, and the process proceeds to step S16.

In step S16, the system controller 20 performs a representative screen detection process. That is, the thinning control signal is supplied to the thinning processing circuit 18. In addition,
In the video signal recording device 1, the system controller 20 may supply only the intermittent interval information to the thinning processing circuit 18 and perform processing so that the thinning processing circuit 18 determines a representative screen to be detected independently. The frame position of the representative screen detected by the system controller 20 is determined, a detection control signal is supplied to the thinning processing circuit 18, and the thinning processing circuit 18 performs processing to detect each representative screen based on the control signal. Is also good.

In step S16, when the detection processing of the representative screen ends, the system controller 20 ends the processing.

As described above, in the video signal recording apparatus 1, by changing the intermittent interval according to the amount of motion and detecting the representative screen, the intermittent recording of the video signal suitable for the content of the motion of the program can be performed and recorded. The content of the video signal can be grasped efficiently.

As a process of detecting the second representative screen using the feature value, the system controller 20 performs a process using the telop information of the video detected by the feature value detection circuit 17. The system controller 20, as shown in FIG.
If the broadcasted program is a news program or the like having a large telop appearance frequency (hereinafter, the telop appearance frequency is simply referred to as the telop amount), the representative screen is detected at a high thinning rate. The representative screen is detected at an intermediate thinning rate, and in the case of a drama or movie, the representative screen is detected at a low thinning rate. Note that the telop amount of each program is not determined using the instantaneous telop amount, but is determined based on the average telop amount within a certain period of time. Further, the method of detecting a telop in a screen by the feature amount detection processing circuit 17 includes, for example, a method of detecting a pixel having a constant luminance continuously in the time axis direction and a method of detecting a region having a higher luminance level than neighboring pixels. A method of detecting, a method of detecting an edge in a screen to detect an edge pattern continuous to a predetermined area, a method of comparing contrast with a background and using a histogram thereof, and the like are considered. However, the method is not particularly limited. Alternatively, the detection may be performed using the telop amount added to the video signal.

The specific processing content of the detection processing of the second representative screen using the characteristic amount will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 9 corresponds to the process of step S6 in the process of FIG. 2 described above.

The system controller 20 reads the predetermined threshold values C and D from the database 21 in advance in step S1 shown in FIG. These thresholds are thresholds for determining the amount of thinning of the video signal. The threshold C is a threshold indicating the upper limit of the telop amount, and the threshold D is a threshold indicating the lower limit of the telop amount. Therefore, threshold C and threshold D
Is such that threshold value C> threshold value D. Further, the system controller 20 determines in step S3 shown in FIG.
The feature amount detection circuit 1 uses the telop amount of the video signal as the feature amount.
7 beforehand. Note that the telop amount here is not the telop amount for each frame, but is, for example, one minute or equation (1).
This is an average telop amount of a video signal obtained by taking an average telop amount for a certain time such as 0 minutes.

First, in step S 21, the system controller 20 compares the average telop amount of the video signal read from the feature amount detection circuit 17 with the threshold value C. If the average telop amount is larger than the threshold value C, step S
Proceed to 22. Then, in step S22, a thinning rate when the telop amount is large is set, that is, a high thinning rate is set, and the process proceeds to step S26. If the average telop amount is smaller than the threshold value C in step S21, the process proceeds to step S23.

In step S23, the system controller 20 compares the average telop amount of the video signal read from the characteristic amount detection circuit 17 with the threshold value D. If the average telop amount is larger than the threshold D, the process proceeds to step S24. Then, in step S24, the thinning rate when the telop amount is intermediate is set, that is, the intermediate thinning rate is set, and the process proceeds to step S26. Step S23
If the average telop amount is smaller than the threshold value D, the process proceeds to step S25. Then, in step S25, a thinning rate when the telop amount is small is set, that is, a low thinning rate is set, and the process proceeds to step S26.

In step S26, the system controller 20 performs a representative screen detection process. That is, the thinning control signal is supplied to the thinning processing circuit 18. In addition,
In the video signal recording device 1, the system controller 20 may supply only the intermittent interval information to the thinning processing circuit 18 and perform processing so that the thinning processing circuit 18 determines a representative screen to be detected independently. The frame position of the representative screen detected by the system controller 20 is determined, a detection control signal is supplied to the thinning processing circuit 18, and the thinning processing circuit 18 performs processing to detect each representative screen based on the control signal. Is also good.

In step S26, when the detection processing of the representative screen ends, the system controller 20 ends the processing.

As described above, in the video signal recording apparatus 1, by intermittently changing the intermittent interval according to the telop amount and detecting the representative screen, the intermittent recording of the video signal suitable for the contents of the telop of the program can be performed and recorded. The content of the video signal can be grasped efficiently.

As a process for detecting the third representative screen using the feature amount, the system controller 20 uses the motion amount of the video detected by the feature amount detection circuit 17 to determine a scene switching point. A process for detecting a so-called cut point is performed. FIG. 10 is a diagram specifically illustrating a process of detecting the third representative screen using the feature amount using a scene of a sports program (here, a soccer program). The system controller 20, as shown in FIG. 10, for detecting the screen point switched from the kick scene time t ₁ to the ball scene as a representative picture. The system controller 20 detects the point has been switched to the heading scene from the ball scene time t ₂ as the representative screen.

Specifically, the system controller 20
In order to detect such a cut point, a process of comparing the detected amount of motion between each image with a predetermined threshold and detecting a representative screen when the amount of motion is larger than the predetermined threshold is performed. Do.

As described above, in the video signal recording device 1, by detecting the cut point of the video signal and using the detected cut point as the representative screen, the video signal suitable for the content of the video can be intermittently recorded. The contents of the recorded video signal can be efficiently grasped.

As a process of detecting the fourth representative screen using the feature amount, the system controller 20 uses the motion amount of the video detected by the feature amount detection circuit 17 to determine a scene switching point. In addition to detecting a so-called cut point as a representative screen, a process of detecting a representative screen at regular intervals is performed for a portion of an image where scene switching is small. FIG. 11 is a diagram specifically showing a process of detecting the fourth representative screen using the feature amounts using a scene of a sports program (here, a soccer program). The system controller 20, as shown in FIG. 11, for detecting the screen point switched from the kick scene time t ₄ the ball scene as a representative picture. In addition, the system controller 20 detects the point at which switched to heading scene from the ball scene of the time t ₇ as the representative screen. Then, the system controller 20 detects the cut point, and also detects the representative screen at predetermined intervals as shown at time t ₃ , time t ₅ , and time t ₆ .

Specifically, the system controller 20
In order to perform such detection, the amount of motion between each of the detected images is compared with a predetermined threshold, and a process of detecting a representative screen when the amount of motion is larger than the predetermined threshold is performed. The thinning rate is changed by increasing or decreasing the threshold.

The details of the process of detecting the fourth representative screen using the characteristic amount will be described with reference to the flowchart shown in FIG.
The flowchart shown in FIG. 12 corresponds to the process of step S6 in the process of FIG. 2 described above.

The system controller 20 reads a predetermined threshold value E from the database 21 in advance in step S1 shown in FIG. This threshold E is set in advance. In addition, the system controller 20 reads out the amount of motion of the video signal from the feature amount detection circuit 17 as the feature amount in step S3 shown in FIG. In addition,
The movement amount here is, for example, a movement amount for each frame.

First, in step S 31, the system controller 20 compares the motion amount of the video signal read from the feature amount detection circuit 17 with the threshold value E. If the movement amount is smaller than the threshold value E, the process proceeds to step S32. Then, in step S32, a predetermined subtraction value is subtracted from the threshold value E, and the process ends. If the motion amount is larger than the threshold value E in step S31, the process proceeds to step S31.
Go to 33.

In step S33, the system controller 20 performs a representative screen detection process. That is, the thinning control signal is supplied to the thinning processing circuit 18. In addition,
The system controller 20 determines the frame position of the representative screen to be detected, and reduces the detection control signal to the thinning processing circuit 18.
, And the thinning processing circuit 18 performs processing to detect each representative screen based on the control signal. When the representative screen detection process is completed in step S33, the process proceeds to step S34.

In step S34, the system controller 20 adds a predetermined added value to the threshold value E and ends the processing.

When the process of step S34 is completed, the audio transmitting unit 10 proceeds to the process of step S8 shown in FIG. 2 for determining whether or not the additional information and the feature amount have been updated. In the process of detecting the fourth representative screen using the feature amount, the process of step S8 is not performed, and it is determined whether the operation of step S9 is completed. If the operation has not been completed, the processing from step S3 is repeated.

Here, the relationship between the subtraction value, which is a constant used to subtract a certain amount from the threshold value E in step S32, and the addition value, which is a constant used to add a certain amount from the threshold value E in step S34. Will be described. The threshold E is
As described above, this is a value for comparison with the amount of motion of each temporally continuous screen constituting a moving image. The system controller 20 compares the amount of motion with the threshold value E, and changes the threshold value E according to the comparison result. That is, the variable amount of the threshold value E is determined by an addition value added when a representative screen is detected and a subtraction value subtracted when a representative screen is not detected. The detection amount of the representative screen for the input moving image is determined by the value of the addition value and the value of the subtraction value. For example, if the ratio between the added value and the subtracted value is 1: 100, the input moving image 100
One representative screen is detected for each sheet. Also, this threshold E
As the absolute value of the addition value and the subtraction value, which are variable amounts of the above, increases, the detection sensitivity increases and the representative screen can be detected on average. Furthermore, if the variable amount is small, the detection of the representative screen varies depending on the detected amount of the difference.

As described above, the video signal recording apparatus 1 detects a cut point of a video signal and detects a representative screen at regular intervals when the number of scene changes is small. The signal can be intermittently recorded, and the contents of the recorded video signal can be grasped efficiently.

When both the additional information and the feature amount are used,
Representative Screen Detection Process As a first representative screen detection process using both the additional information and the feature amount, the system controller 20 determines the genre information detected by the additional information detection circuit 16 and the image detected by the feature amount detection circuit 17. The processing using the telop information is performed. As shown in FIG. 13A, the system controller 20 performs a process of detecting a representative screen that has a high thinning rate and preferentially detects a telop image in a case of a news program or the like having many telop images. In the case of a program such as a drama or a movie, the process of detecting a representative screen which has a low thinning rate and preferentially detects a telop image is performed. Perform detection processing.

The representative screen detection with the telop image priority is as follows.
As shown in FIG. 13B, after detecting the representative screen at equal intervals, it is determined whether or not a telop image exists near the detected representative screen. The screen is detected with priority. In this case, the system controller 20 needs to determine the telop using the instantaneous telop amount. That is, the system controller 20 needs to acquire from the feature amount detection circuit 17 whether or not a telop exists for each screen.

FIG. 14 shows the specific processing content of the first representative screen detection process using both the additional information and the feature amount.
This will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 14 corresponds to the process of step S6 in the process of FIG. 2 described above.

The system controller 20 reads out the telop information of the video signal from the feature detection circuit 17 as the feature in step S3 shown in FIG. In this step S3, genre information is read from the additional information detection circuit 16 as additional information. Note that the telop information here is information on whether or not a telop exists for each frame.

First, in step S41, the system controller 20 sets a telop flag for each frame in which a telop exists based on the telop information read from the additional information detection circuit 16.

Subsequently, in step S42, the system controller 20 determines the genre information and determines whether or not the program is a sports program. If it is determined in step S42 that the program is a sports program, in step S43,
A low thinning rate is set, and the process proceeds to step S47. If it is determined in step S42 that the program is not a sports program, the process proceeds to step S44.

In step S44, the system controller 20 further determines genre information to determine whether or not the program is a news program. If it is determined in step S44 that the program is a news program, in step S45, a high thinning rate is set, and the process proceeds to step S47. If it is determined in step S44 that the program is not a news program, the process proceeds to step S46 in which an intermediate draw rate is set in step S46.

At step S47, the system controller 20 performs a representative screen detection process. That is, the thinning control signal is supplied to the thinning processing circuit 18.

Subsequently, in step S48, the system controller 20 determines whether a telop flag exists near the detected representative screen. If it is determined that there is a frame with a telop flag set nearby, the process proceeds to step S49, the representative screen set in step S47 is changed to a frame with the telop flag set, and the process ends. If it is determined that there is no frame with the telop flag set in the vicinity, the process ends.

As described above, in the video signal recording apparatus 1, by detecting the representative screen using the additional information such as the genre information and the telop information and the characteristic amount, the video signal suitable for the content of the video can be intermittently recorded. The content of the recorded video signal can be grasped more efficiently.

Further, as a process of detecting the second representative screen using the additional information and the characteristic amount, the system controller 20
Performs processing using the information on the broadcast time zone detected by the additional information detection circuit 16 and the motion amount of the video detected by the feature value detection circuit 17. As shown in FIG. 15, when the time zone of a broadcast program is a time zone called a so-called golden time, as shown in FIG. 15, the system controller 20 detects the fourth representative screen using the above-described feature amount (hereinafter, frame time). Representative screen detection process) to detect the representative screen,
If the time zone of the program to be broadcast is a time zone other than the golden time, the representative screen is detected using the above-described third representative screen detection process using the characteristic amount (hereinafter, referred to as a cut point representative screen detection process). Is detected.

The specific processing content of the second representative screen detection processing using both the additional information and the characteristic amount is shown in FIG.
This will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 16 corresponds to the process of step S6 in the process of FIG. 2 described above.

In step S 1 shown in FIG. 2, the system controller 20 reads a predetermined threshold value from the database 21 in advance. In addition, the system controller 20 reads the motion amount of the video signal from the feature amount detection circuit 17 as the feature amount in step S3 shown in FIG. In this step S3, information on the broadcast time zone of the program is read from the additional information detection circuit 16 as additional information.

In step S51, the system controller 20 determines whether or not the program is a golden time program based on the information on the broadcast time zone. If it is determined that it is the golden time, in step S52, the frame capture detection process shown in the flowchart of FIG. 12 described above is performed, and the process ends.

When it is determined that the current time is not the golden time, in step S53, a cut point is detected by comparing a predetermined threshold value with a motion amount, and the cut point is detected as a representative screen.

As an example of the process of detecting the second representative screen using the additional information and the characteristic amount, an example is shown in which the process is switched to either the cut point representative screen detection process or the frame capture representative screen detection process depending on the broadcast time zone. However, switching between the cut point representative screen detection processing and the frame capture representative screen detection processing can be applied not only in accordance with the broadcast time zone but also in other cases. For example, in the case of a thinning interval of 1 frame / 5 seconds or more, a frame capture representative screen detection process is performed, and
In the case of a thinning-out interval of less than frame / 5 seconds, it is also possible to switch such that a cut point representative screen detection process is performed.

As described above, the video signal recording device 1 uses the detection processing of a plurality of representative screens using the additional information and the characteristic amount, and selects these as necessary based on an operation input or the like to detect the representative screen. Is performed, intermittent recording of the video signal suitable for the content of the video can be performed, and the content of the recorded video signal can be grasped more efficiently.

As described above, in the video signal recording device 1,
By performing the intermittent recording of the video signal using the additional information and the feature amount, the outline of the recorded video can be easily grasped. Furthermore, since the representative screen is efficiently selected according to the content of the video, an effective intermittent image that can grasp the outline of the video recorded in a short time can be generated.

Next, a learning process using the database 21 of the video signal recording device 1 will be described.

The system controller 20 saves the above-described additional information and information on the characteristic amount, and information such as the additional information input by the user using the operation input processing circuit 22 on the database 21 for a certain period of time. Then, statistical processing and the like are performed based on the information, and a thinning rate is set.

For example, as shown in FIG. 17, the database 21 has a table of the frequency distribution of each thinning rate in the broadcasting time zone. When there is no designation of operation input or the like, the system controller 20 refers to this frequency distribution,
The representative screen is detected by selecting the highest frequency thinning rate.

The specific processing content of the detection processing using the learning processing will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 18 corresponds to the process of step S4 in the process of FIG. 2 described above.

In step S 1 shown in FIG. 2, the system controller 20 reads the frequency distribution of the past thinning rates from the database 21. In addition, the system controller 20 reads the additional information from the additional information detection circuit 16 and the feature amount from the feature amount detection circuit 17 in step S3 shown in FIG.

First, in step S61, the system controller 20 determines whether or not there is a setting of a thinning rate or a method of setting each thinning rate by the user. If there is a designation from the user, step S62
The system controller 20 specifies the thinning rate based on the operation input. That is, this step S
From 62, the above-described specific thinning rate setting processing is performed.
The representative screen is detected. If there is no designation from the user in step S61, the process proceeds to step S63.

In step S63, the system controller 20 determines whether or not there is frequency distribution data indicating the information of the thinning rate on the database 21. If the system controller 20 determines that there is no frequency distribution data in the database 21, the process proceeds to step S64, in which the thinning rate is set to an initial value, for example, an intermediate thinning rate, and the process ends. If it is determined that the data of the frequency distribution exists on the database 21, the process proceeds to step S65.

In step S65, the system controller 20 adds additional information and the like read in advance to the frequency distribution on the database 21.

Subsequently, in step S66, the system controller 20 performs statistical processing, and based on the statistical processing, sets a thinning rate in step S67.

As described above, in the video signal recording device 1,
By storing the thinning rate for a certain period in the database 21 and setting the thinning rate based on the information stored in the database 21, a suitable thinning rate can be set.

Next, an identification signal supplied from the system controller 20 of the video signal recording device 1 to the recording processing circuit 14 will be described.

The system controller 20 determines the thinning rate and the representative screen to be detected as described above, and controls the thinning processing circuit 18 based on the thinning rate and the like. Further, the system controller 20 supplies an identification signal to the recording processing circuit 14 according to the thinning rate and the like. Recording processing circuit 14
Records the identification signal together with the video signal as a subcode or ID code of the video signal.

For example, when a video signal is recorded on an optical disk, as shown in Table 1 below, a subcode is recorded for each sector which is the minimum recording unit. At the time of reproduction, intermittent video signal reproduction is performed based on this subcode.

[0124]

[Table 1]

As described above, in the video signal recording device 1, by adding the identification signal to the video signal, it is possible to record the normal video signal on the recording medium 15 and to record the intermittent reproduction information in this video signal. it can. That is, two types of normal video signals and intermittent video signals are not recorded on the recording medium 15, and the recording medium 15 can be used efficiently. Therefore, the video signal recording device 1 can record a video signal that can be intermittently reproduced when reproduced and can also be reproduced normally.

[0126]

In the video signal recording apparatus according to the present invention, a representative screen is detected according to the additional information and the intermittent video signal is recorded, so that the outline of the recorded content can be grasped. Can be generated, and by reproducing the intermittent video, a video signal corresponding to the content of the additional information can be efficiently grasped.

In the video signal recording apparatus according to the present invention, the representative screen is detected in accordance with the characteristic amount and the intermittent video signal is recorded, so that the intermittent video which can grasp the outline of the recorded content is generated. By reproducing the intermittent video, a video signal corresponding to the content of the feature can be efficiently grasped.

In the video signal recording device according to the present invention, the representative screen is detected in accordance with the additional information and the characteristic amount and the intermittent video signal is recorded, so that the outline of the recorded content can be grasped. A video can be generated, and by reproducing the intermittent video, a video signal corresponding to the content of the additional information and the feature can be efficiently grasped.

In the video signal recording method according to the present invention, a representative screen is detected in accordance with the additional information and an intermittent video signal is recorded, so that an intermittent video which can grasp the outline of the recorded content is generated. By reproducing the intermittent video, a video signal corresponding to the content of the additional information can be efficiently grasped.

In the video signal recording method according to the present invention, the representative screen is detected in accordance with the characteristic amount and the intermittent video signal is recorded, so that the intermittent video which can grasp the outline of the recorded content is generated. By reproducing the intermittent video, a video signal corresponding to the content of the feature can be efficiently grasped.

In the video signal recording method according to the present invention, the representative screen is detected according to the additional information and the characteristic amount and the intermittent video signal is recorded, so that the outline of the recorded content can be grasped. A video can be generated, and by reproducing the intermittent video, a video signal corresponding to the content of the additional information and the feature can be efficiently grasped.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video signal recording apparatus according to an embodiment to which the present invention is applied.

FIG. 2 is a flowchart showing processing contents of a system controller of the video signal recording device.

FIG. 3 is a diagram illustrating a thinning rate of a representative screen detected by the video signal recording device.

FIG. 4 is a diagram illustrating a thinning rate of a representative screen detected by the video signal recording device.

FIG. 5 is a diagram illustrating a thinning rate of a representative screen detected by the video signal recording device.

FIG. 6 is a diagram illustrating a thinning rate of a representative screen detected by the video signal recording device.

FIG. 7 is a flowchart showing processing contents of a system controller of the video signal recording device.

FIG. 8 is a diagram illustrating a thinning rate of a representative screen detected by the video signal recording device.

FIG. 9 is a flowchart showing processing contents of a system controller of the video signal recording device.

FIG. 10 is a diagram illustrating a representative screen detected by the video signal recording device.

FIG. 11 is a diagram illustrating a representative screen detected by the video signal recording device.

FIG. 12 is a flowchart showing processing contents of a system controller of the video signal recording device.

FIG. 13 is a diagram illustrating a representative screen detected by the video signal recording device.

FIG. 14 is a flowchart showing processing contents of a system controller of the video signal recording device.

FIG. 15 is a diagram illustrating a thinning rate of a representative screen detected by the video signal recording device.

FIG. 16 is a flowchart showing processing contents of a system controller of the video signal recording device.

FIG. 17 is a diagram illustrating a frequency distribution of a thinning rate stored in a database 21 of the video signal recording device.

FIG. 18 is a flowchart showing processing contents of a system controller of the video signal recording device.

[Explanation of symbols]

1 video signal recording device, 2 video signal input processing circuit, 3
Camera signal input processing circuit, 4 digital video signal input processing circuit, 5 received signal input processing circuit, 7 video signal compression circuit, 14 recording processing circuit, 15 recording medium, 16,
Additional information detection circuit, 17 feature amount detection circuit, 18 thinning processing circuit, 20 system controller, 21 database, 22 operation input processing circuit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiya Akiba 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Noboru Murashibayashi 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation (72) Inventor Mami Tomita 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Taro Mizuto 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (30)

[Claims] 1. A detecting means for reproducing a moving image from a broadcasted video signal and intermittently detecting a representative screen from the reproduced moving image, and an additional information reproducing means for reproducing additional information of the broadcasted video signal. A video signal recording apparatus comprising: a control unit that controls an intermittent interval of a representative screen detected by the detection unit according to the additional information; and a recording unit that records the representative screen on a recording medium. 2. The video signal recording apparatus according to claim 1, wherein the recording unit records the video signal of the representative screen on a recording medium together with the broadcasted video signal. 3. An apparatus according to claim 1, further comprising: an identification signal generating unit configured to generate an identification signal indicating a portion including the representative screen in the broadcasted video signal, wherein the recording unit adds the identification signal to the broadcasted video signal. The video signal recording apparatus according to claim 1, wherein the video signal is recorded on a recording medium. 4. The video signal recording apparatus according to claim 1, wherein said control means controls an intermittent interval of the representative screen detected by said detection means according to the content of the broadcast video signal. 5. The video signal recording apparatus according to claim 1, wherein said control means controls an intermittent interval of a representative screen detected by said detection means according to a broadcast time of a broadcast video signal. . 6. The video signal recording apparatus according to claim 1, wherein said control means controls an intermittent interval of a representative screen detected by said detection means according to a source of a broadcast video signal. . 7. A detecting means for reproducing a moving image from a broadcasted video signal and intermittently detecting a representative screen from the reproduced moving image, and a characteristic amount detecting means for detecting a characteristic amount of the broadcasted video signal. A video signal recording device comprising: a control unit that controls an intermittent interval of a representative screen detected by the detection unit according to the feature amount; and a recording unit that records the representative screen on a recording medium. 8. The video signal recording apparatus according to claim 7, wherein the recording means records the video signal of the representative screen on a recording medium together with the broadcasted video signal. 9. An identification signal generating unit for generating an identification signal indicating a portion including a representative screen in a broadcasted video signal, wherein the recording unit adds the identification signal to the broadcasted video signal. The video signal recording apparatus according to claim 7, wherein the video signal is recorded on a recording medium. 10. The feature amount detection means detects a motion amount of a broadcasted video signal, and the control means controls an intermittent interval of a representative screen detected by the detection means according to the motion amount. The video signal recording device according to claim 7, wherein: 11. The feature amount detecting means detects a telop signal of a broadcasted video signal, and the control means controls an intermittent interval of a representative screen detected by the detecting means according to the telop signal. The video signal recording device according to claim 7, wherein: 12. The feature amount detection means detects a scene change point of a broadcasted video signal, and the control means controls an intermittent interval of a representative screen detected by the detection means according to the scene change point. The video signal recording device according to claim 7, wherein 13. A detecting means for reproducing a moving image from a broadcasted video signal and intermittently detecting a representative screen from the reproduced moving image, and an additional information reproducing means for reproducing additional information of the broadcasted video signal. A feature amount detecting unit that detects a feature amount of the broadcasted video signal; a control unit that controls an intermittent interval of a representative screen detected by the detecting unit according to the additional information and the feature amount; A recording means for recording a screen on a recording medium. 14. The video signal recording apparatus according to claim 13, wherein the recording means records the video signal of the representative screen together with the broadcasted video signal on a recording medium. 15. An identification signal generating unit for generating an identification signal indicating a portion including a representative screen in a broadcasted video signal, wherein the recording unit adds the identification signal to the broadcasted video signal. 14. The video signal recording apparatus according to claim 13, wherein the video signal is recorded on a recording medium. 16. A reproduced moving image by reproducing a moving image from a broadcasted video signal, reproducing additional information of the broadcasted video signal, changing an intermittent interval of a representative screen to be detected according to the additional information. A video signal recording method characterized by intermittently detecting a representative screen from an image and recording the representative screen on a recording medium. 17. The video signal recording method according to claim 16, wherein the video signal of the representative screen is recorded on a recording medium together with the broadcasted video signal. 18. A method for generating an identification signal indicating a portion of a broadcasted video signal including a representative screen, adding the identification signal to the broadcasted video signal, and recording the video signal on a recording medium. Claim 1 characterized by the following:
7. The video signal recording method according to item 6. 19. According to the content of a broadcasted video signal,
17. The video signal recording method according to claim 16, wherein an intermittent interval of a representative screen to be detected is changed. 20. The video signal recording method according to claim 16, wherein an intermittent interval of a representative screen to be detected is changed according to a broadcast time of the broadcast video signal. 21. The video signal recording method according to claim 16, wherein an intermittent interval of a representative screen to be detected is changed according to a source of the broadcast video signal. 22. A reproduced moving image by reproducing a moving image from a broadcasted video signal, detecting a feature amount of the broadcasted video signal, and changing an intermittent interval of a representative screen to be detected according to the feature amount. A video signal recording method characterized by intermittently detecting a representative screen from an image and recording the representative screen on a recording medium. 23. The video signal recording method according to claim 22, wherein the video signal of the representative screen is recorded on a recording medium together with the broadcasted video signal. 24. Generating an identification signal indicating a portion including a representative screen in a broadcasted video signal, adding the identification signal to the broadcasted video signal, and recording the video signal on a recording medium. 3. The method according to claim 2, wherein
3. The video signal recording method according to item 2. 25. The video signal recording method according to claim 22, wherein a motion amount of the broadcasted video signal is detected, and an intermittent interval of the representative screen to be detected is changed according to the motion amount. 26. The video signal recording method according to claim 22, wherein a telop signal of the broadcast video signal is detected, and an intermittent interval of a representative screen to be detected is changed according to the telop signal. 27. The video signal recording method according to claim 22, wherein a scene change point of the broadcasted video signal is detected, and an intermittent interval of a representative screen to be detected is changed according to the scene change point. . 28. A method for reproducing a moving image from a broadcasted video signal, reproducing additional information of the broadcasted video signal, detecting a feature amount of the broadcasted video signal, detecting the additional information and the feature amount. A video signal recording method, comprising: changing an intermittent interval of a representative screen to be detected in accordance with the above, intermittently detecting a representative screen from a reproduced moving image, and recording the representative screen on a recording medium. 29. The video signal recording method according to claim 28, wherein the video signal of the representative screen is recorded on a recording medium together with the broadcasted video signal. 30. Generating an identification signal indicating a portion of a broadcast video signal including a representative screen, adding the identification signal to the broadcast video signal, and recording the video signal on a recording medium. 3. The method according to claim 2, wherein
9. The video signal recording method according to item 8.