JP4000623B2 - Video signal recording apparatus and video signal recording method - Google Patents

Description

【０１２５】
以上のように映像信号記録装置１では、識別信号を映像信号に付加することにより、通常の映像信号を記録媒体１５に記録するとともに、この映像信号に間欠再生情報を記録することができる。すなわち、記録媒体１５上に、通常の映像信号と間欠映像信号を２種類記録することなくなり、記録媒体１５を効率的に利用することができる。従って、映像信号記録装置１では、再生した際に間欠的に再生することができ、且つ、通常の再生もすることができる映像信号を記録することができる。
【０１２６】
【発明の効果】
本発明に係る映像信号記録装置では、付加情報及び特徴量を選択的に用いて代表画面を検出して間欠的な映像信号を記録することにより、記録した内容の概略を知ることができる間欠画像を生成でき、この間欠画像を再生することにより、付加情報及び特徴量の内容に応じた映像信号を効率的に把握することができる。
【０１２７】
本発明に係る映像信号記録装置では、特徴量に応じて代表画面を検出して間欠的な映像信号を記録することにより、記録した内容の概略を把握することができる間欠映像を生成することができ、この間欠映像を再生することにより、特徴量の内容に応じた映像信号を効率的に把握することができる。
【０１２９】
本発明に係る映像信号記録方法では、付加情報及び特徴量を選択的に用いて代表画面を検出して間欠的な映像信号を記録することにより、記録した内容の概略を知ることができる間欠画像を生成でき、この間欠画像を再生することにより、付加情報及び特徴量の内容に応じた映像信号を効率的に把握することができる。
【０１３０】
本発明に係る映像信号記録方法では、特徴量に応じて代表画面を検出して間欠的な映像信号を記録することにより、記録した内容の概略を把握することができる間欠映像を生成することができ、この間欠映像を再生することにより、特徴量の内容に応じた映像信号を効率的に把握することができる。
【図面の簡単な説明】
【図１】本発明を適用した実施の形態の映像信号記録装置のブロック構成図である。
【図２】上記映像信号記録装置のシステムコントローラの処理内容を示すフローチャートである。
【図３】上記映像信号記録装置が検出する代表画面の間引き率を説明する図である。
【図４】上記映像信号記録装置が検出する代表画面の間引き率を説明する図である。
【図５】上記映像信号記録装置が検出する代表画面の間引き率を説明する図である。
【図６】上記映像信号記録装置が検出する代表画面の間引き率を説明する図である。
【図７】上記映像信号記録装置のシステムコントローラの処理内容を示すフローチャートである。
【図８】上記映像信号記録装置が検出する代表画面の間引き率を説明する図である。
【図９】上記映像信号記録装置のシステムコントローラの処理内容を示すフローチャートである。
【図１０】上記映像信号記録装置が検出する代表画面を説明する図である。
【図１１】上記映像信号記録装置が検出する代表画面を説明する図である。
【図１２】上記映像信号記録装置のシステムコントローラの処理内容を示すフローチャートである。
【図１３】上記映像信号記録装置が検出する代表画面を説明する図である。
【図１４】上記映像信号記録装置のシステムコントローラの処理内容を示すフローチャートである。
【図１５】上記映像信号記録装置が検出する代表画面の間引き率を説明する図である。
【図１６】上記映像信号記録装置のシステムコントローラの処理内容を示すフローチャートである。
【図１７】上記映像信号記録装置のデータベース２１が記憶する間引き率の度数分布を説明する図である。
【図１８】上記映像信号記録装置のシステムコントローラの処理内容を示すフローチャートである。
【符号の説明】
１ 映像信号記録装置、２ 映像信号入力処理回路、３ カメラ信号入力処理回路、４ デジタル映像信号入力処理回路、５ 受信信号入力処理回路、７ 映像信号圧縮回路、１４ 記録処理回路、１５ 記録媒体、１６、付加情報検出回路、１７ 特徴量検出回路、１８ 間引き処理回路、２０ システムコントローラ、２１ データベース、２２ 操作入力処理回路[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a video signal recording apparatus and video signal recording method for recording video signals such as television broadcasting and digital satellite broadcasting, and in particular, video for recording intermittent video for grasping the outline of the content of the video signal to be recorded. The present invention relates to a signal recording apparatus and a video signal recording method.
[0002]
[Prior art]
In recent years, recording media such as optical disks, hard disks, and digital video tapes that record video signals broadcast on television broadcasts and digital satellite broadcasts have storage capacities ranging from several megabytes to several tens of gigabytes. Progressing. Therefore, such a large-capacity recording medium enables continuous recording for a long time, such as several hours to several tens of hours, for television broadcasting or the like.
[0003]
[Problems to be solved by the invention]
By the way, when recording such as television broadcasting using such a recording medium, since the recording capacity is very large, it is possible to confirm all contents in a short time even if high-speed playback or the like is performed after recording. Can not. Therefore, when recording a television broadcast or the like using such a large-capacity recording medium, it is necessary to have a function for confirming the outline of the recorded contents and the recording position information of each program.
[0004]
However, it has been very difficult to confirm an outline of the contents of a video signal recorded on a conventional recording medium. For example, in order to confirm the outline of the content recorded on the recording medium, an interval playback in which playback points are skipped at regular intervals can be considered. In this interval playback, the information content of the recorded video signal is completely unrelated. It will be played back and the contents will be difficult to understand.
[0005]
The present invention has been made in view of such circumstances, and when a broadcast video signal is recorded on a recording medium, a video signal recording that generates an intermittent video that can grasp an outline of the recorded content. An object is to provide an apparatus and a video signal recording method.
[0006]
[Means for Solving the Problems]
  In order to solve the above-described problem, a video signal recording apparatus according to the present invention includesProjectionDetection means for reproducing a moving image from an image signal and intermittently detecting a representative screen from the reproduced moving image;RecordingAdditional information reproducing means for reproducing additional information of an image signal;Feature quantity detection means for detecting the feature quantity of the video signal;The above additional information andSelectively using featuresControl means for controlling the intermittent interval of the representative screen detected by the detecting means, and recording the representative screen on a recording mediumTo controlRecordcontrolMeans.
[0007]
  In this video signal recording apparatus, additional informationAnd selectively using featuresA representative screen is detected and intermittent video signals are recorded.
[0008]
  The video signal recording apparatus according to the present invention isProjectionDetection means for reproducing a moving image from an image signal and intermittently detecting a representative screen from the reproduced moving image;RecordingA feature amount detecting unit that detects a feature amount of an image signal; a feature amount that is detected by the feature amount detecting unit and includes an average value of a motion amount or telop amount of an image for a certain period; and an upper limit value of the motion amount or telop amount And a control means for controlling the intermittent rate of the representative image detected by the detection means by controlling the thinning rate of the moving image based on the lower limit value, and the representative screen is recorded on a recording medium.To controlRecordcontrolMeans.
[0009]
In this video signal recording apparatus, a representative screen is detected according to the feature amount and an intermittent video signal is recorded.
[0011]
In this video signal recording apparatus, a representative screen is detected in accordance with the additional information and the feature amount, and an intermittent video signal is recorded.
[0012]
  A video signal recording method according to the present invention includes:ProjectionPlay video from the image signal andRecordingReproduce additional information of the image signal,Detect the feature quantity of the broadcast video signal,Additional information aboveAnd selectively using featuresThe intermittent interval of the representative screen to be detected is changed, the representative screen is intermittently detected from the reproduced moving image, and the representative screen is recorded on the recording medium.To controlIt is characterized by that.
[0013]
  In this video signal recording method, additional informationAnd selectively using featuresA representative screen is detected and intermittent video signals are recorded.
[0014]
  A video signal recording method according to the present invention includes:ProjectionPlay video from the image signal andRecordingA feature amount including an average value of the motion amount or telop amount of the image signal for a certain period is detected, and the moving image thinning rate is determined based on the feature amount and the upper limit value and the lower limit value of the motion amount or telop amount. To change the intermittent interval of the representative screen to be detected, detect the representative screen intermittently from the reproduced video,
  Record the representative screen on a recording mediumTo controlIt is characterized by that.
[0015]
In this video signal recording method, an intermittent video signal is recorded by detecting a representative screen according to the feature amount.
[0017]
In this video signal recording method, an intermittent video signal is recorded by detecting a representative screen according to the additional information and the feature amount.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
A video signal recording apparatus according to an embodiment of the present invention will be described below 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 obtained by thinning video signals other than the representative screen. It is a device to do.
[0019]
FIG. 1 is a block diagram of a video signal recording apparatus according to an embodiment of the present invention.
[0020]
The video signal recording apparatus 1 is broadcasted with a video signal input processing circuit 2 to which an analog video signal broadcast or transmitted by wire is input and a camera signal input processing circuit 3 to which a transmission signal from a camera is input. Digital video signal input processing circuit 4 to which the transmitted digital video signal is input, reception signal input processing circuit 5 to which the wirelessly broadcast video signal and audio signal are input, video signal input processing circuit 2, camera signal Video signal switching circuit 6 for switching video signals input by the input processing circuit 3, digital video signal input processing circuit 4, and reception signal input processing circuit 5, and a video signal compression circuit for compressing the input video signal 7.
[0021]
The video signal recording apparatus 1 includes an audio signal input processing circuit 8 to which an analog audio signal broadcast or transmitted by wire is input, a microphone signal input processing circuit 9 to which a transmission signal from a microphone is input, and a broadcast Digital audio signal input processing circuit 10 to which a digital audio signal transmitted or transmitted is input, audio signal input processing circuit 8, microphone signal input processing circuit 9, digital audio signal input processing circuit 10, and reception signal input processing circuit 5, an audio signal switching circuit 11 for switching the audio signal input processed by the audio signal 5, an audio signal detection processing circuit 12 for detecting the audio signal, and an audio signal compression circuit 13 for compressing the input audio signal. ing.
[0022]
In addition, the video signal recording apparatus 1 includes a recording processing circuit 14 that synthesizes the video signal compressed by the video signal compression circuit 7 and the audio signal compressed by the audio signal compression circuit 13 and records them on the recording medium 15. Yes.
[0023]
Also, additional information detection circuit 16 for detecting additional information of a video signal to be broadcasted or transmitted, or additional information superimposed or added to each video signal, and a feature amount detection circuit for detecting a feature amount of the video signal 17 and a thinning processing circuit 18 that detects a representative screen and thins out other video signals.
[0024]
In addition, the video signal recording apparatus 1 controls the thinning processing circuit 18 based on the additional information and the feature amount, and a system controller 20 that controls each circuit, and a database 21 that stores data referred to by the system controller 20; And an operation input processing circuit 22 for supplying operation input information to the system controller 20.
[0025]
For example, an analog video signal broadcast by wire or a transmitted analog video signal is input to the video signal input processing circuit 2. The video signal input processing circuit 2 demodulates and converts the analog video signal into a baseband video signal, converts the baseband video signal into a digital video signal, and supplies the digital video signal to the video signal switching circuit 6. .
[0026]
For example, a video signal photographed by a video camera is input to the camera signal input processing circuit 3. If the video signal from the video camera is an analog signal, the camera signal input processing circuit 3 demodulates and converts it into a baseband video signal, and converts this baseband video signal into a digital video signal. This 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 for decompressing the compressed signal, and the like, and supplies it to the video signal switching circuit 6.
[0027]
For example, a digitally transmitted video signal or a digitally broadcast video signal is input to the digital video signal input processing circuit 4. 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, decompression processing of the compressed signal, etc., and switches the video signal Supply to circuit 6.
[0028]
The received signal input processing circuit 5 is input with a video signal and an audio signal which are wirelessly broadcast and received by an antenna or the like. The received signal input processing circuit 5 performs processing such as demodulation of the received video signal, converts it into a baseband video signal, converts this baseband video signal into a digital video signal, and converts the video signal into a video signal switching circuit 6. To supply. Further, if the video signal is a digital signal, decoding processing such as error correction and decompression processing of compressed data is performed, and the video signal is supplied to the video signal switching circuit 6. The received signal input processing circuit 5 performs processing such as demodulation of the received audio signal, converts it into a baseband audio signal, converts this baseband audio signal into a digital audio signal, and switches the audio signal. Supply to the circuit 11. Further, if the audio signal is a digital signal, decoding processing such as error correction and decompression processing of the compressed data is performed and supplied to the audio signal switching circuit 11.
[0029]
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 reception 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 selects any one of the input video signals based on the control of the system controller 20, and the video signal compression circuit 7, the additional information detection circuit 16, and the feature amount detection circuit 17. , And the thinning processing circuit 18.
[0030]
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 is either a digital video signal from the video signal switching circuit 6 or an intermittent digital video signal from a thinning circuit 18 described later, or both of them, for example, MPEG2 (Moving Picture Experts Group 2) system or the like Is compressed and supplied to the recording processing circuit 14. The audio signal input processing circuit 8 receives, for example, an analog audio signal broadcast by wire or a transmitted analog audio signal. The audio signal input processing circuit 8 demodulates the analog audio signal and converts it into a baseband audio signal, converts the baseband audio signal into a digital audio signal, and supplies the digital audio signal to the audio signal switching circuit 11. .
[0031]
For example, an audio signal detected by a microphone is input to the microphone signal input processing circuit 9. If the audio signal from the microphone is an analog signal, the microphone signal input processing circuit 9 demodulates and converts it into a baseband audio signal, converts the baseband audio signal into a digital audio signal, and converts the audio signal 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 error signal is corrected and the compressed signal is decompressed, and the decoded signal is supplied to the audio signal switching circuit 11.
[0032]
For example, a digitally transmitted audio signal or a digitally broadcast audio signal is input to the digital audio signal input processing circuit 10. The digital audio signal input processing circuit 10 performs processing such as demodulation of the input audio signal, converts it to baseband digital data, performs error correction, decompression processing of the compressed signal, etc., and switches the audio signal Supply to the circuit 11.
[0033]
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 reception signal input processing circuit 5 are input to the audio signal switching circuit 11. The audio signal switching circuit 11 selects one of the input audio signals based on the control of the system controller 20 and supplies the selected audio signal to the audio signal detection processing circuit 12.
[0034]
A digital audio signal from the audio signal switching circuit 11 is input to the audio signal detection processing circuit 12. Based on the control of the system controller 20, the audio signal detection processing circuit 12 detects an audio signal corresponding to the intermittent video signal after the video signal is thinned out by a thinning processing circuit 18 described later, and supplies the audio signal to the audio signal compression circuit 13. . Alternatively, the audio signal detection processing circuit 12 supplies the audio signal compression circuit 13 with an audio signal corresponding to the intermittent video signal after the video signal is thinned out by the thinning processing circuit 18 together with the input digital audio signal.
[0035]
  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 using, for example, the MPEG audio system and supplies the compressed signal to the recording processing circuit 14. A digital video signal from the video signal compression circuit 7 and a 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, combines them according to the recording format of the recording medium 15. In addition, file management information called a so-called FAT (File Allocation Table), TOC (Table Of Contents), subcode, etc. is generated in accordance with a recording medium for recording, and synthesized together with a digital video signal and a digital audio signal. The file management information and the like may be generated by the system controller 20 and recorded by the recording processing circuit 14 by combining with the video signal or the like. Then, the recording processing circuit 14 modulates the video signals to be recorded by a predetermined method, and performs error correction code addition processing and the like to record on the recording medium 15.
[0036]
  The recording medium 15 may be any recording medium such as a magnetic disk, a magneto-optical disk, an optical disk, a semiconductor memory, or a magnetic tape.
[0037]
The additional information detection circuit 16 receives the digital video signal from the video signal switching circuit 6. Further, the additional information detection circuit 16 is supplied with additional information supplied together with each input video signal of the reception 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, such as information inserted in the vertical blanking period, pilot information, or additional information included in the header portion of the digital video signal, etc. . Further, the additional information detection circuit 16 detects additional information supplied together with each input video signal. The details of this additional information will be described later.
[0038]
A digital video signal from the video signal switching circuit 6 is input to the feature amount detection circuit 17. The feature amount detection circuit 17 detects a motion amount, a telop or the like from the video signal, and outputs the detected motion amount, telop or the like as a feature amount. The feature quantity detection circuit 17 supplies the detected feature quantity to the system controller 20. Details of the amount of movement will be described later.
[0039]
A digital video signal from the video signal switching circuit 6 is input to the thinning processing circuit 18. The thinning processing circuit 18 detects a representative screen from the supplied digital signal, and generates an intermittent video signal in which a video other than the representative screen is thinned out. The system controller 20 controls the amount by which the video signal switching circuit 6 thins out images, that is, the interval between representative screens to be detected. The thinning processing circuit 18 supplies the generated intermittent video signal to the video signal compression circuit 7.
[0040]
The system controller 20 is supplied with additional information from the additional information detection circuit 16 and feature quantities from the feature quantity detection circuit 17. The system controller 20 controls the representative screen detected by the thinning processing circuit 18 based on the input additional information and feature amount. That is, the thinning amount of the video signal is controlled.
[0041]
Further, 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. The recording processing circuit 14 adds the identification signal to the video signal and records it on the recording medium 15.
[0042]
Further, 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 type 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.
[0043]
The system controller 20 is supplied with control information and the like from the database 21. The system controller 20 performs various controls based on this control information.
[0044]
Further, the 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 this operation input information.
[0045]
Next, the above-described representative screen detection control performed by the system controller 20 of the video signal recording apparatus 1 will be described with reference to a flowchart and the like.
[0046]
FIG. 2 is a flowchart showing the contents of the representative screen detection control performed by the system controller 20. The system controller 20 starts the process from step S1 when the power source of the video signal recording apparatus 1 is input. Note that the system controller 20 proceeds with processing in the order of step numbers unless otherwise indicated. In step S1, the system controller 20 performs initial setting of the controlled circuit.
[0047]
In step S <b> 2, 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 intermittent video is generated. The system controller 20 waits in this step S2 until there is an operation input, and proceeds to step S3 when there is an operation input.
[0048]
In step S <b> 3, 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 quantity detected by the feature quantity detection circuit 17. In step S5, which will be described later, when processing that does not require any of the additional information or the feature amount is performed, in this step S3, only the additional information or the feature amount is read.
[0049]
In step S4, the system controller 20 determines the content 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 operation input is performed. Details of the specific contents of the plurality of processes will be described later.
[0050]
In step S5, the system controller 20 selects information necessary for the processing determined in step S4 from the acquired additional information and feature amount. That is, the system controller 20 selects a specific parameter from the additional information and the feature amount, and uses it later to determine the intermittent interval.
[0051]
In step S6, the system controller 20 obtains an intermittent interval of the video signal that is the detection interval of the representative screen based on the processing content determined in step S4 described above, and controls the thinning processing circuit 18.
[0052]
In step S7, an identification signal is generated, and this identification signal is supplied to the recording processing circuit 4.
[0053]
In step S8, the system controller 20 determines whether or not the additional information or the feature amount has been updated. If it is determined that the additional information or feature amount has been updated, the process from step S3 is repeated. If it is determined that the additional information or feature amount has not been updated, the process proceeds to step S9.
[0054]
In step S9, the system controller 20 determines whether or not the recording is finished. If it is determined that the recording has not ended, the processing from step S8 is repeated. That is, the system controller 20 waits until the additional information or the feature amount is updated or the recording is finished in Step S8 and Step S9. When determining that the recording has ended, the system controller 20 ends the processing shown in this flowchart.
[0055]
Next, specific examples of the additional information and the feature amount described above will be given, and specific contents of the representative screen detection process using them will be described.
[0056]
Representative screen detection process when additional information is used
Examples of the additional information detected by the additional information detection circuit 16 include a program genre, a broadcast time zone, and a broadcast channel.
[0057]
As the first representative screen detection process using the additional information, the system controller 20 performs a process using the program genre information, that is, the broadcast content information of the program. As shown in FIG. 3, the system controller 20 performs a process of detecting a representative screen by changing the thinning rate between a case where a broadcast program is a news program, for example, and a case other than that. When this news program is recorded, recording is performed with a high thinning rate. This is because news programs are often explained by voice, telop, etc., and their contents can be understood even if the thinning rate is increased. Therefore, the system controller 20 determines the contents of the broadcast program based on the additional information, and in the case of a program with many explanations by voice or telop, such as a news program, the decimation rate is set in comparison with other programs. Increase the size to detect the representative screen.
[0058]
As described above, the video signal recording apparatus 1 can intermittently record a video signal suitable for the content of the program by detecting the representative screen while changing the intermittent interval according to the program, and efficiently records the content of the recorded video signal. Can be grasped.
[0059]
Further, as the second representative screen detection process using the additional information, the system controller 20 performs a process using the broadcast time zone information. As shown in FIG. 4, the system controller 20 detects a representative screen by changing the thinning rate between a case where a broadcast program is in a so-called golden time with a high audience rating and a case other than that. I do. When recording a program broadcast during this golden time, the representative screen is detected by lowering the thinning rate compared to other time periods. Accordingly, the system controller 20 determines the broadcast program time zone based on the additional information, and in the case of a time zone in which the audience rating is generally high, such as a golden time time zone, it is compared with other time zones. To reduce the decimation rate.
[0060]
As described above, the video signal recording apparatus 1 can perform intermittent recording of video signals suitable for each time zone by detecting the representative screen by changing the intermittent interval according to the broadcast time zone. The contents can be grasped efficiently.
[0061]
Further, as the third representative screen detection process using the additional information, the system controller 20 performs a process using the broadcast channel information. When the system controller 20 has a plurality of broadcast channels, that is, a plurality of broadcast video signal supply sources, for example, as shown in FIG. 5, there are three channels of A channel, B channel, and C channel. A process of detecting the representative screen by changing the thinning rate is performed for each channel. For example, when recording the B channel, the representative screen is detected at a high decimation rate. When recording the C channel, the representative screen is detected at an intermediate decimation rate. When recording the A channel, the representative screen is detected at a low decimation rate. Is detected.
[0062]
Thus, 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 contents can be grasped efficiently.
[0063]
Representative screen detection processing using feature values
The feature amount detected by the feature amount detection circuit 17 includes, for example, a motion amount of a video, that is, a motion vector between images, telop information indicating a telop inserted in the screen, and the like.
[0064]
As the 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 if the broadcast program is a sports program with a large amount of motion, and represents the representative screen at an intermediate thinning rate if it is a drama or a movie. The screen is detected. In the case of a news program or the like, the representative screen is detected at a high thinning rate. Note that the motion amount of each program is not determined using the instantaneous motion amount, but is determined based on the motion amount obtained by averaging the motion amounts of a plurality of frames. Also, the motion amount detection method by the feature amount detection processing circuit 17 is not particularly limited. Further, it may be detected using the amount of motion added to the video signal.
[0065]
The specific processing contents of the first representative screen detection processing using this feature 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.
[0066]
  The system controller 20 reads in advance the predetermined threshold A and threshold B from the database 21 in step S1 shown in FIG. These threshold values are threshold values for setting the thinning rate from the motion amount of the video signal, the threshold value A is a threshold value indicating the upper limit of the motion amount, and the threshold value B is a threshold value indicating the lower limit of the motion amount. Therefore, the relationship between the threshold A and the threshold B is threshold A> threshold B. Further, 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. Note that the amount of motion here is not the amount of motion for each frame, but the average amount of motion of the video signal over a certain period of time, for example, 30 frames or several tens of frames.
[0067]
First, in step S <b> 11, 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 A. When the average motion amount is larger than the threshold value A, the process proceeds to step S12. In step S12, a thinning rate is set when the amount of motion is large, that is, a low thinning rate is set, and the flow proceeds to step S16. If the average motion amount is smaller than the threshold A in step S11, the process proceeds to step S13.
[0068]
In step S <b> 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. When the average motion amount is smaller than the threshold value B, the process proceeds to step S14. In step S14, the thinning rate is set when the amount of motion is intermediate, that is, the intermediate thinning rate is set, and the process proceeds to step S16. If the average motion amount is smaller than the threshold value B in step S13, the process proceeds to step S15. In step S15, a thinning rate is set when the amount of motion is large, that is, a high thinning rate is set, and the flow proceeds to step S16.
[0069]
In step S16, the system controller 20 performs representative screen detection processing. That is, the thinning control signal is supplied to the thinning processing circuit 18. In the video signal recording apparatus 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. Further, the frame position of the representative screen detected by the system controller 20 is determined and a detection control signal is supplied to the thinning processing circuit 18, and the thinning processing circuit 18 performs processing so as to detect each representative screen based on this control signal. You may do it.
[0070]
In step S16, when the representative screen detection process ends, the system controller 20 ends the process.
[0071]
As described above, the video signal recording apparatus 1 can intermittently record a video signal suitable for the content of the motion of the program by changing the intermittent interval according to the amount of motion and detecting the representative screen. The contents can be grasped efficiently.
[0072]
As detection processing of the second representative screen using the feature amount, the system controller 20 performs processing using the telop information of the video detected by the feature amount detection circuit 17. As shown in FIG. 8, the system controller 20 represents a broadcast program with a high decimation rate when the broadcast program has a high telop appearance frequency (hereinafter, the telop appearance frequency is simply referred to as a telop amount), for example. In the case of a sports program or the like, the screen is detected, and the representative screen is detected at an intermediate thinning rate. In the case of a drama or a 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 predetermined time. The feature amount detection processing circuit 17 detects the telop in the screen by, for example, a method of detecting pixels having a constant luminance continuously in the time axis direction or a region having a higher luminance level than the neighboring pixels. Possible methods include detection, edge detection within the screen and detection of edge patterns that are continuous in a predetermined area, and detection using the histogram by comparing the contrast with the background. However, the method is not particularly limited. Alternatively, detection may be performed using the amount of telop added to the video signal.
[0073]
The specific processing contents of the second representative screen detection processing using this feature 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.
[0074]
  The system controller 20 reads a predetermined threshold C and threshold D from the database 21 in advance in step S1 shown in FIG. These threshold values are threshold values for determining the thinning amount of the video signal, the threshold value C is a threshold value indicating the upper limit of the telop amount, and the threshold value D is a threshold value indicating the lower limit of the telop amount. Therefore, the relationship between the threshold C and the threshold D is threshold C> threshold D. Further, the system controller 20 reads the telop amount of the video signal from the feature amount detection circuit 17 as the feature amount in step S3 shown in FIG. Note that the amount of telop here is not the amount of telop for each frame, but the average amount of telop of a video signal in a certain time such as 1 minute or several tens of minutes.
[0075]
First, in step S <b> 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. When the average telop amount is larger than the threshold value C, the process proceeds to step S22. In step S22, a thinning rate is set when the amount of telop is large, 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.
[0076]
In step S <b> 23, 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 D. When the average telop amount is larger than the threshold value D, the process proceeds to step S24. In step S24, the thinning rate is set when the telop amount is intermediate, that is, the intermediate thinning rate is set, and the process proceeds to step S26. If the average telop amount is smaller than the threshold value D in step S23, the process proceeds to step S25. In step S25, the thinning rate is set when the telop amount is small, that is, the thinning rate is set, and the process proceeds to step S26.
[0077]
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 the video signal recording apparatus 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. Further, the frame position of the representative screen detected by the system controller 20 is determined and a detection control signal is supplied to the thinning processing circuit 18, and the thinning processing circuit 18 performs processing so as to detect each representative screen based on this control signal. You may do it.
[0078]
In step S26, when the representative screen detection process ends, the system controller 20 ends the process.
[0079]
As described above, the video signal recording apparatus 1 can intermittently record a video signal suitable for the contents of the telop of the program by detecting the representative screen by changing the intermittent interval according to the amount of telop. The contents can be grasped efficiently.
[0080]
In addition, as the third representative screen detection process using the feature amount, the system controller 20 uses a motion amount of the video detected by the feature amount detection circuit 17 to use a so-called cut point that is a scene (scene) switching point. The process which detects is performed. FIG. 10 is a diagram specifically showing a third representative screen detection process using this feature amount using a scene of a sports program (here, a soccer program). The system controller 20, as shown in FIG.₁The screen at the point where the kick scene is switched to the ball scene is detected as a representative screen. In addition, the system controller 20₂The point where the ball scene is switched to the heading scene is detected as a representative screen.
[0081]
Specifically, the system controller 20 compares the detected amount of motion between each image with a predetermined threshold to detect such a cut point, and when the amount of motion becomes larger than the predetermined threshold. In addition, processing for detecting a representative screen is performed.
[0082]
As described above, the video signal recording apparatus 1 can detect the cut point of the video signal and use the detected cut point as a representative screen to perform intermittent recording of the video signal suitable for the content of the video. The contents of the signal can be grasped efficiently.
[0083]
Further, as the fourth representative screen detection process using the feature amount, the system controller 20 uses a motion amount of the video detected by the feature amount detection circuit 17 to use a so-called cut point that is a scene (scene) switching point. Is detected as a representative screen, and a process for detecting the representative screen at regular intervals is performed in a portion of a video where there are few scene changes. FIG. 11 is a diagram specifically showing a fourth representative screen detection process using this feature amount using a scene of a sports program (here, a soccer program). The system controller 20, as shown in FIG._FourThe screen at the point where the kick scene is switched to the ball scene is detected as a representative screen. In addition, the system controller 20₇The point where the ball scene is switched to the heading scene is detected as a representative screen. Then, the system controller 20 detects this cut point and at time t_Three, Time t_Five, Time t₆As shown, the representative screen is detected at a predetermined interval.
[0084]
Specifically, in order to perform such detection, the system controller 20 compares the detected amount of motion between each image with a predetermined threshold, and when the amount of motion becomes larger than the predetermined threshold, the representative screen Is performed, and the threshold value is increased or decreased to change the thinning rate.
[0085]
The contents of the fourth representative screen detection process using the feature 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.
[0086]
The system controller 20 reads a predetermined threshold E from the database 21 in advance in step S1 shown in FIG. This threshold value E is set in advance. Further, in step S3 shown in FIG. 2, the system controller 20 reads out the motion amount of the video signal as the feature amount from the feature amount detection circuit 17. The amount of motion here is, for example, the amount of motion for each frame.
[0087]
First, in step S <b> 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 amount of movement is smaller than the threshold value E, the process proceeds to step S32. In step S32, a predetermined subtraction value is subtracted from the threshold value E, and the process is terminated. If the amount of motion is larger than the threshold value E in step S31, the process proceeds to step S33.
[0088]
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. The system controller 20 determines the frame position of the representative screen to be detected, supplies a detection control signal to the thinning processing circuit 18, and the thinning processing circuit 18 performs processing so as to detect each representative screen based on the control signal. do. When the representative screen detection process ends in step S33, the process proceeds to step S34.
[0089]
In step S34, the system controller 20 adds a predetermined added value to the threshold value E and ends the process.
[0090]
When the process of step S34 is completed, the audio transmitting unit 10 proceeds to a process of determining whether the additional information and the feature amount have been updated in step S8 illustrated in FIG. In the fourth representative screen detection process used, 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 ended, the processing from step S3 is repeated.
[0091]
Here, the relationship between the subtraction value that is a constant used for subtracting a certain amount from the threshold value E in step S32 and the addition value that is a constant used to add a certain amount from the threshold value E in step S34 will be described. . The threshold value E is a value for comparison with the amount of movement of each temporally continuous screen constituting the moving image as described above. 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 the addition value that is added when the representative screen is detected and the subtraction value that is subtracted when the representative screen is not detected. The detected amount of the representative screen for the input moving image is determined by the value of the addition value and the subtraction value. For example, if the ratio between the addition value and the subtraction value is 1: 100, one representative screen is detected for 100 input moving images. Further, if the absolute value of the added value and the subtracted value, which are variable amounts of the threshold value E, is increased, the detection sensitivity is increased, and the representative screen can be detected on average. Furthermore, if the variable amount is small, the detection of the representative screen varies according to the difference detection amount.
[0092]
As described above, the video signal recording apparatus 1 detects the cut point of the video signal and detects the representative screen at regular intervals when the scene change is small, thereby intermittently interrupting the video signal suitable for the content of the video. It is possible to record and to efficiently grasp the contents of the recorded video signal.
[0093]
Representative screen detection processing using both additional information and feature values
As the first representative screen detection process using both the additional information and the feature amount, the system controller 20 uses the genre information detected by the additional information detection circuit 16 and the telop information of the video detected by the feature amount detection circuit 17. Process. As shown in FIG. 13 (a), the system controller 20 performs a process of detecting a representative screen that preferentially detects a telop image with a high decimation rate in the case of a news program or the like with many telop images, In the case of a program such as a drama or a movie, the processing for detecting a representative screen with priority for telop images is performed. Perform detection processing.
[0094]
This telop image priority representative screen detection, as shown in FIG. 13B, determines whether a telop image exists in the vicinity of the detected representative screen after detecting the representative screen at equal intervals. When a telop image exists in the vicinity, the screen is preferentially detected. In this case, the system controller 20 needs to determine the telop using an 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.
[0095]
The specific processing content of the first representative screen detection processing using both the additional information and the feature amount will be described with reference to the flowchart shown in FIG. Note that the flowchart shown in FIG. 14 corresponds to the process of step S6 in the process of FIG. 2 described above.
[0096]
In step S3 shown in FIG. 2, the system controller 20 reads out the telop information of the video signal from the feature quantity detection circuit 17 as the feature quantity. In step S3, genre information is read from the additional information detection circuit 16 as additional information. The telop information here is information as to whether or not a telop exists for each frame.
[0097]
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.
[0098]
Subsequently, in step S42, the system controller 20 determines genre information to determine whether the program is a sports program. If it is determined in step S42 that the program is a sports program, in step S43, the 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.
[0099]
In step S44, the system controller 20 further determines genre information to determine whether the program is a news program. If it is determined in step S44 that the program is a news program, a high thinning rate is set in step S45, and the process proceeds to step S47. If it is determined in step S44 that the program is not a news program, the intermediate rate is set in step S46, and the process proceeds to step S47.
[0100]
In 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.
[0101]
Subsequently, in step S48, the system controller 20 determines whether or not a telop flag exists in the vicinity of the detected representative screen. If it is determined that there is a frame with a telop flag in the vicinity, the process proceeds to step S49, the representative screen set in step S47 is changed to a frame with a telop flag set, and the process is terminated. If it is determined that there is no frame with a telop flag set in the vicinity, the process ends.
[0102]
As described above, the video signal recording apparatus 1 can perform intermittent recording of a video signal suitable for the content of the video by detecting the representative screen using the additional information such as genre information and telop information and the feature amount, and the recorded video. The content of the signal can be grasped more efficiently.
[0103]
In addition, as the second representative screen detection process using the additional information and the feature amount, the system controller 20 detects the broadcast time zone information detected by the additional information detection circuit 16 and the motion of the video detected by the feature amount detection circuit 17. Process with quantity. As shown in FIG. 15, when the time zone of the broadcast program is a so-called golden time, the system controller 20 detects the fourth representative screen using the above-described feature amount (hereinafter referred to as “frame time”). The representative screen is detected by using the above-mentioned feature amount when the representative screen is detected and the time zone of the broadcast program is a time zone other than the golden time. (Hereinafter referred to as cut point representative screen detection processing) is used to detect the representative screen.
[0104]
The specific processing contents of the second representative screen detection processing using both the additional information and the feature amount will be described with reference to the flowchart shown in FIG. Note that the flowchart shown in FIG. 16 corresponds to the process of step S6 in the process of FIG. 2 described above.
[0105]
The system controller 20 reads a predetermined threshold value from the database 21 in advance in step S1 shown in FIG. Further, 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 step S3, information on the broadcast time zone of the program is read from the additional information detection circuit 16 as additional information.
[0106]
In step S51, the system controller 20 determines whether the program is a golden time program based on the broadcast time zone information. If it is determined that it is the golden time, in step S52, the frame removal detection process shown in the flowchart of FIG. 12 described above is performed, and the process ends.
[0107]
If it is determined that it is not the golden time, a cut point is detected by comparing a predetermined threshold value with the amount of movement in step S53, and this cut point is detected as a representative screen.
[0108]
In addition, as the second representative screen detection process using the additional information and the feature amount, an example of switching to either the cut point representative screen detection process or the frame-removal representative screen detection process according to the broadcast time zone has been shown. Switching between the cut point representative screen detection process and the frame picking representative screen detection process can be applied not only in accordance with the broadcast time zone but also in other cases. For example, it is possible to switch such that a frame-removal representative screen detection process is performed in the case of a thinning interval of 1 frame / 5 seconds or more, and a cut-point representative screen detection process is performed in the case of a thinning interval of 1 frame / 5 seconds or less. .
[0109]
As described above, the video signal recording apparatus 1 uses the detection processing of a plurality of representative screens using the additional information and the feature amount, and selects these as necessary based on an operation input or the like to detect the representative screen. Thus, 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.
[0110]
As described above, the video signal recording apparatus 1 can easily grasp the outline of the recorded video by intermittently recording the video signal using the additional information and the feature amount. Furthermore, since the representative screen is efficiently selected according to the content of the video, it is possible to generate an effective intermittent image that allows an overview of the video recorded in a short time.
[0111]
Next, a learning process using the database 21 of the video signal recording apparatus 1 will be described.
[0112]
The system controller 20 stores the above-described additional information, feature amount information, and additional information input by the user using the operation input processing circuit 22 on the database 21 for a certain period of time. Perform statistical processing based on the information and set the thinning rate.
[0113]
For example, as shown in FIG. 17, the database 21 has a frequency distribution table for each thinning rate in the broadcast time zone. When there is no operation input designation or the like, the system controller 20 refers to the frequency distribution, selects the highest frequency thinning rate, and detects the representative screen.
[0114]
Specific processing contents of the detection processing using this learning processing will be described with reference to the flowchart shown in FIG. Note that the flowchart shown in FIG. 18 corresponds to the process of step S4 in the process of FIG. 2 described above.
[0115]
In step S <b> 1 shown in FIG. 2, the system controller 20 reads the frequency distribution of the past thinning rate described above from the database 21. Further, the system controller 20 reads the additional information from the additional information detection circuit 16 and the feature quantity from the feature quantity detection circuit 17 in step S3 shown in FIG.
[0116]
First, in step S61, the system controller 20 determines whether there is a setting of a thinning rate or a setting processing method for each thinning rate from the user. If there is a designation from the user, the process proceeds to step S62, and the system controller 20 designates a thinning rate based on the operation input. That is, the specific thinning rate setting process described above is performed from step S62, and the representative screen is detected. If there is no designation from the user in step S61, the process proceeds to step S63.
[0117]
In step S <b> 63, the system controller 20 determines whether there is frequency distribution data indicating the thinning rate information on the database 21. If the system controller 20 determines that there is no frequency distribution data on the database 21, the process proceeds to step S64. In this step S64, the thinning rate is set to an initial value, for example, an intermediate thinning rate, and the process ends. If it is determined that there is frequency distribution data on the database 21, the process proceeds to step S65.
[0118]
In step S <b> 65, the system controller 20 adds additional information read in advance to the frequency distribution on the database 21.
[0119]
Subsequently, in step S66, the system controller 20 performs statistical processing, and in step S67, a thinning rate is set based on the statistical processing.
[0120]
As described above, in the video signal recording apparatus 1, the thinning rate for a certain period is stored in the database 21, and the thinning rate is set based on the information stored in the database 21, thereby setting a suitable thinning rate. can do.
[0121]
Next, an identification signal supplied from the system controller 20 of the video signal recording apparatus 1 to the recording processing circuit 14 will be described.
[0122]
The system controller 20 obtains a thinning rate and a 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 or the like. The recording processing circuit 14 records this identification signal together with the video signal as a subcode or ID code of the video signal.
[0123]
For example, if a video signal is recorded on an optical disc, a subcode is recorded for each sector, which is the minimum recording unit, as shown in Table 1 below. In reproduction, intermittent video signals are reproduced based on the subcode.
[0124]
[Table 1]

[0125]
As described above, in the video signal recording apparatus 1, by adding the identification signal to the video signal, the normal video signal can be recorded on the recording medium 15 and the intermittent reproduction information can be recorded on the video signal. 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 apparatus 1 can record a video signal that can be played back intermittently during playback and can be played back normally.
[0126]
【The invention's effect】
  In the video signal recording apparatus according to the present invention, the additional informationAnd selectively using featuresBy detecting a representative screen and recording an intermittent video signal, an intermittent image can be generated so that the outline of the recorded content can be known. By reproducing this intermittent image, additional information can be obtained.And featuresIt is possible to efficiently grasp the video signal corresponding to the video signal.
[0127]
The video signal recording apparatus according to the present invention can generate an intermittent video that can grasp the outline of the recorded content by detecting a representative screen according to the feature amount and recording an intermittent video signal. In addition, by reproducing this intermittent video, it is possible to efficiently grasp a video signal corresponding to the content of the feature amount.
[0129]
  In the video signal recording method according to the present invention, the additional informationAnd selectively using featuresBy detecting a representative screen and recording an intermittent video signal, an intermittent image can be generated so that the outline of the recorded content can be known. By reproducing this intermittent image, additional information andFeature valueIt is possible to efficiently grasp the video signal corresponding to the content of the video.
[0130]
In the video signal recording method according to the present invention, an intermittent video that can grasp an outline of the recorded content can be generated by detecting a representative screen according to the feature amount and recording an intermittent video signal. In addition, by reproducing this intermittent video, it is possible to efficiently grasp a video signal corresponding to the content of the feature amount.
[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 apparatus.
FIG. 3 is a diagram for explaining a thinning rate of a representative screen detected by the video signal recording apparatus.
FIG. 4 is a diagram for explaining a thinning rate of a representative screen detected by the video signal recording apparatus.
FIG. 5 is a diagram for explaining a thinning rate of a representative screen detected by the video signal recording apparatus.
FIG. 6 is a diagram for explaining a thinning rate of a representative screen detected by the video signal recording apparatus.
FIG. 7 is a flowchart showing processing contents of a system controller of the video signal recording apparatus.
FIG. 8 is a diagram for explaining a thinning rate of a representative screen detected by the video signal recording apparatus.
FIG. 9 is a flowchart showing processing contents of a system controller of the video signal recording apparatus.
FIG. 10 is a diagram illustrating a representative screen detected by the video signal recording apparatus.
FIG. 11 is a diagram illustrating a representative screen detected by the video signal recording apparatus.
FIG. 12 is a flowchart showing processing contents of a system controller of the video signal recording apparatus.
FIG. 13 is a diagram illustrating a representative screen detected by the video signal recording apparatus.
FIG. 14 is a flowchart showing processing contents of a system controller of the video signal recording apparatus.
FIG. 15 is a diagram for explaining a thinning rate of a representative screen detected by the video signal recording apparatus.
FIG. 16 is a flowchart showing processing contents of a system controller of the video signal recording apparatus.
FIG. 17 is a diagram for explaining a frequency distribution of thinning rates stored in the database 21 of the video signal recording apparatus.
FIG. 18 is a flowchart showing the processing contents of the system controller of the video signal recording apparatus.
[Explanation of symbols]
DESCRIPTION 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 Reception signal input processing circuit, 7 Video signal compression circuit, 14 Recording processing circuit, 15 Recording medium, 16, additional information detection circuit, 17 feature quantity detection circuit, 18 decimation processing circuit, 20 system controller, 21 database, 22 operation input processing circuit

Claims (14)

Playing a moving picture Film image signal, detecting means for detecting the intermittent representative screen from the moving image reproduction,
An additional information reproducing means for reproducing the additional information above Kiutsu image signal,
Feature quantity detection means for detecting the feature quantity of the video signal;
Control means for controlling the intermittent interval of the representative screen detected by the detection means by selectively using the additional information and the feature amount ;
A video signal recording apparatus comprising: a recording control unit configured to control the representative screen to be recorded on a recording medium. The recording control means may movies image signal, a video signal recording apparatus according to claim 1, wherein the controller controls to record into the recording medium a video signal of the representative screen. An identification signal generating means for generating an identification signal indicating a portion included representatives screens of movies image signal,
It said recording control means, the movies image signal by adding the identification signal, a video signal recording apparatus according to claim 1, wherein the controller controls so as to record the video signal on a recording medium. It said control means, a video signal recording apparatus according to claim 1, characterized in that to control the intermittent spacing of representative pictures detected by the detection means in accordance with the contents of the movies image signal. It said control means, a video signal recording apparatus according to claim 1, characterized in that to control the intermittent spacing of representative pictures detected by the detection means in accordance with the broadcast time of the movies image signal. Said control means, a video signal recording apparatus according to claim 1, in accordance with the supplier's Film image signal and controlling the intermittent spacing of representative pictures detected by the detection means. Playing a moving picture Film image signal, detecting means for detecting the intermittent representative screen from the moving image reproduction,
A characteristic quantity detecting means for detecting a feature quantity of the upper Kiutsu image signal,
Based on the feature amount detected by the feature amount detection means and including the average value of the motion amount or telop amount of the image for a certain period, and the upper limit value and lower limit value of the motion amount or telop amount, the moving image thinning rate Control means for controlling the intermittent interval of the representative image detected by the detection means,
A video signal recording apparatus comprising: a recording control unit configured to control the representative screen to be recorded on a recording medium. The recording control means may movies image signal, a video signal recording apparatus according to claim 7, wherein the controller controls to record into the recording medium a video signal of the representative screen. An identification signal generating means for generating an identification signal indicating a portion included representatives screens of movies image signal,
It said recording control means, the movies image signal by adding the identification signal, a video signal recording apparatus according to claim 7, wherein the controller controls so as to record the video signal on a recording medium. The characteristic quantity detecting means detects the motion amount of movies image signal,
The video signal recording apparatus according to claim 7, wherein the control unit controls an intermittent interval of the representative screen detected by the detection unit in accordance with the amount of movement. It said feature detection means detects a telop signal of movies image signal,
The video signal recording apparatus according to claim 7, wherein the control unit controls an intermittent interval of the representative screen detected by the detection unit in accordance with the telop signal. The characteristic quantity detecting means detects a scene change point of movies image signal,
The video signal recording apparatus according to claim 7, wherein the control unit controls an intermittent interval of the representative screen detected by the detection unit according to the scene change point. Playing a moving picture Film image signal,
It reproduces the additional information above Kiutsu image signal,
Detect the feature quantity of the broadcast video signal,
The intermittent interval of the representative screen to be detected by selectively using the additional information and the feature amount is changed, and the representative screen is intermittently detected from the reproduced moving image.
A video signal recording method comprising: controlling the representative screen to be recorded on a recording medium. Playing a moving picture Film image signal,
Detecting a feature quantity including a mean value of motion amount or a telop of a certain period of the image of the upper Kiutsu image signal,
Based on the feature value and the upper limit value and the lower limit value of the motion amount or the telop amount, the moving image thinning rate is controlled to change the intermittent interval of the representative screen to be detected, and intermittently from the reproduced moving image. Detect representative screen,
A video signal recording method comprising: controlling the representative screen to be recorded on a recording medium.

Images