JPH07201159A - Video signal reproducing device - Google Patents

Abstract

PURPOSE:To make a user possible to perform highly efficient reproduction by fetching picture information reproduced immediately before starting fast forwarding to a storage means during a mode for performing the reproduction after performing the fast forwarding to the position of the retrieval object identification information of a recording track and repeatedly and continuously reading the picture information during the fast forwarding period. CONSTITUTION:The start position mark of the retrieval object identification information is recorded in the identification information recording area Irec of a magnetic tape. When a VTR detects the start position mark of n-th retrieval object information, for instance, during an index scanning mode, after the reproduction is started and the video signals of recording areas A, B, C and D are reproduced, it is switched over to the fast forwarding operation automatically and the start position mark of (n+1)th retrieval object information is searched. During the search period S, the reproduced field signals of the final area D in the video signals of the recording areas A, B, C and D are fetched to a video memory and repeatedly and continuously read.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal reproducing apparatus for reproducing a video signal recorded on a recording track on a tape-shaped recording medium.

[0002]

2. Description of the Related Art As an apparatus for recording a video signal on a recording medium, for example, a magnetic recording medium, a so-called electronic still camera for recording a still image of a subject on a floppy disk, or a video tape for recording using a magnetic tape, for example. A camera-integrated type 8 mm video tape recorder is known as a recorder. The stationary video tape recorder is commercialized as a storage device that demodulates an electric wave transmitted through a built-in tuner and records the demodulated video signal.

[0003]

By the way, when index information as search target identification information is recorded at an arbitrary tape position in a video tape recorder, and the index is detected during high-speed tape feeding in a search mode or the like. , Some have an index scan function to play from this index position.

The conventional index scan function will be described in detail. For example, as shown in FIG. 5, for example, as shown in FIG. 5, a video is displayed during a period from the detection of one index and the reproduction of the index for a predetermined time to the detection of the next index. The tape recorder feeds the tape at high speed by mechanical control. According to this index scan function, when a plurality of programs are recorded on one tape, the above index is recorded at the beginning of each program, so that the beginning of each program can be recorded one after another. You can automatically scan, that is, pan, and check the tape recording contents. Also,
It is also a convenient function to use for cueing when editing.

By the way, if the reproduced video signal is output as it is while the tape is being fed at high speed in order to detect the next index, the timing of the NTSC video signal of the current broadcast is broken and the screen is disturbed. Therefore, in the VTR with the index scan function, so-called mute processing is performed so that the video signal is not displayed and is not displayed. However, since nothing is displayed during the no-signal period NS during the mute process, it is meaningless and useless for the user.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a video signal reproducing apparatus capable of performing efficient reproduction for a user during reproduction.

[0007]

In order to solve the above-mentioned problems, a video signal reproducing apparatus according to the present invention is a video signal reproducing apparatus for reproducing a video signal recorded on a recording track on a tape-shaped recording medium. The image information reproduced immediately before the start of the high-speed feeding is displayed in the mode in which the high-speed feeding is started after the high-speed feeding to the position of the search target identification information recorded in advance together with the video signal recorded on the recording track of the tape-shaped recording medium. It is characterized in that it is stored in the storage means and the image information is repeatedly read out from the storage means during this high-speed feeding period.

Here, the start position mark and the end position mark of the search target identification information are recorded on the tape-shaped recording medium, and the image information of the recording track corresponding to the position immediately before the end position mark is stored in the storage means. Is taken into. By recording the mark at the reproduction start position and the mark at the reproduction end position on the tape-shaped recording medium as an identification signal, unnecessary video parts can be skipped during recording, or a mixed recording of still images and moving images can be performed. It is possible to display them separately.

Further, in the storage means of the video signal reproducing apparatus,
The image information of one field or the image information of one frame immediately before the start of the high speed feeding is written, and the written image information is repeatedly read until the end of the high speed feeding.

[0010]

In the video signal reproducing apparatus according to the present invention, when the reproduction is performed after the high-speed feeding to the position of the search target identification information previously recorded on the recording track of the tape-shaped recording medium, the reproduction is performed immediately before the start of the high-speed feeding. By capturing the image information in the storage means and continuously reading out the image information from the storage means during this high-speed feed period, the image is continuously output even during the high-speed feed period during reproduction to confirm the contents. It is possible to significantly reduce the time required for the reproduction, and to continuously reproduce only a desired period while performing high-speed feeding without causing the user a feeling of strangeness or giving stress.

Further, according to the present invention, a start position mark and an end position mark are recorded beforehand as search target identification information at the time of recording, and at the time of reproduction, image information from a corresponding recording track immediately before the end position mark is recorded. By fetching the information in the storage means and reading it out repeatedly, the image information is reproduced from the storage means instead of the screen by so-called mute processing, and only the period requested by the user is constantly displayed.

Further, the field image information immediately before the start of the high speed feeding is written in the storage means, and the written image information is repeatedly read until the high speed feeding is completed, thereby avoiding the no signal state during the high speed feeding period. However, the image reproduced immediately before can be displayed.

By writing the frame image information immediately before the start of high-speed feeding to the storage means, it is possible to display the frame image information having a higher image quality than the image information of one field.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a video signal reproducing apparatus according to the present invention will be described below with reference to the drawings. The video signal reproducing device of the present embodiment is a video tape recorder (hereinafter,
This is an example in which the present invention is applied to a VTR).

The case of recording this still image on the magnetic tape 20 will be described in detail with reference to FIG. By performing helical scanning while rotating the magnetic head, oblique recording tracks are formed on the magnetic tape. The magnetic tape 20 travels and moves in the direction of arrow L in FIG.
As a result, the respective information is recorded in the diagonal video signal recording track V and the identification information recording area I _REC shown in FIG. 1 by the helical scan of the magnetic head.

During a mode in which reproduction is performed after high-speed feeding to the position of search target identification information (so-called index mark etc.) previously recorded together with the video signal recorded in the recording track V of the magnetic tape 20, for example, so-called index scan mode. For example, reproduction is performed for a predetermined field period, the image information reproduced immediately before the start of the high-speed feeding is loaded into the field memory, and repeatedly read from the field memory during the high-speed feeding period S.
Continue to output the video memory output signal shown in.

In FIG. 1, the identification information recording area I
The start position mark of the search target identification information is recorded in _REC . When the VTR detects, for example, the start position mark of the n-th search target information during the so-called index scan mode, the VTR starts reproduction from the start position mark of the n-th search target information, and reproduces only for a predetermined period shown in FIG. After that, it automatically switches to the high-speed feed operation, and the next n + 1
Search or search the start position mark of the search target information. Then, when the start position mark of the n + 1th search target information is detected, the operation of switching to the high-speed feed after repeating the reproduction for the predetermined period is repeated.

During the search period S, since the VTR is performing a high-speed search by mechanical control, conventionally, the mute processing is performed as described above to output no signal. The image in the area D in FIG. 1 is displayed in order to allow the user to reproduce the search period S without feeling uncomfortable and not to waste time. That is, the video signals of the recording areas A, B, C and D are reproduced as the predetermined period of FIG. 1, and the field signal reproduced immediately before the high speed feeding of the last area D in this period is taken into the video memory. . The video memory is stored in the memory from the last reproduced field signal to the identification information recording area I _REC in which the number n + 1 of the next start position mark is recorded by the memory control signal supplied from the control system of the VTR. The captured field signal is repeatedly output at the same timing as when it was read from the recording track V of the magnetic tape 20.

When the next start position mark number n + 1 is actually detected by mechanical control, the output of the field signal from the video memory is terminated and the field signal of the video recording area E is output. After that, the VTR is a video recording area E,
The field signals sequentially reproduced from F, G, and H are output. After the field signal of this predetermined period is reproduced,
The VTR starts the search again. The VTR fetches the field signal as the image information reproduced at the end of the recording area H immediately before the start of the search in the video memory during the mechanical control period. Similar to the above, the video memory repeatedly outputs the same field signal from the video memory until the start position mark number n + 2 is detected.

By repeating such high-speed feed scanning, the video memory unit 8 reproduces the image information to be output during the search period S for performing high-speed feed scanning by mechanical control, immediately before the start of high-speed feed scanning. By storing the signal and subsequently reading the stored field signal from the video memory as image information until the next start mark number is detected, there is no signal period during which no image is displayed on the monitor screen for monitoring the playback signal. I'm losing.

For example, even with a magnetic tape recorded for 2 hours, if the identification information signal is input through the access marker switch at the time of recording when the scene changes, a part of each scene is performed by performing high-speed scanning during reproduction. Can be displayed as a digest.

In FIG. 1, the predetermined reproduction period is set to 4 fields for simplification of the illustration, but it is needless to say that the actual reproduction period is set to such a degree that the content can be visually confirmed, for example, about several seconds.

Next, V to which the embodiment according to the present invention can be applied
As one specific example of TR, an example in which the present invention is applied to a camera-integrated 8 mm VTR capable of performing still image recording during moving image recording will be described. Recently, a camera-integrated 8 mm VTR has been commercialized as a device capable of recording not only moving images but also still images. A case of reproducing a magnetic tape in which such moving images and still images are mixed will be described below.

This camera-integrated 8 mm VTR is composed of a plurality of lens groups as an optical system, for example, as shown in FIG. 2, and a lens system 1 for forming an image of transmitted light transmitted through these lens groups, and this lens system. An image pickup unit as an image pickup unit configured by a solid-state image pickup device 2 for converting transmitted light of 1 into an electric signal, and a camera signal processing unit 3 for inputting an output signal from the solid-state image pickup device 2 to perform signal processing in a camera. And a microphone 4 that collects audio signals of the surrounding environment, and a microphone 4
Audio signal processing unit 5 for processing the audio signal from the
, A VTR signal processing unit 6 for inputting a video signal from the camera signal processing unit 3 and an audio signal from the audio signal processing unit 5 to process a VTR signal, and a VTR signal processing unit 6 for recording.
A recording / reproducing system 7 for recording the output signal from the magnetic tape on a magnetic tape and reproducing the information recorded on the magnetic tape at the time of reproduction;
A video memory 8 for temporarily writing the video signal from the TR signal processing unit 6 according to the control signal and reading the written video signal according to the control signal, the lens system 1, the solid-state image sensor 2, and the camera signal. Processing unit 3, audio signal processing unit 5,
VTR signal processing unit 6, recording / reproducing system 7 and video memory unit 8
And a control system 9 for controlling the.

To briefly explain each structure, the lens system 1 is composed of a plurality of lens groups. For zoom operation, for example, a key signal from a zoom operation switch attached to the apparatus is supplied to the control system 10,
The zoom operation is performed according to the control signal from the. Also,
The lens system 1 controls the iris meter of the lens system 1 with a control signal output from the control system 9 from a signal supplied via the solid-state image sensor 2 and the camera signal processing unit 3. By this iris control, the lens system 1 is adjusted by narrowing the amount of incident light and exposure control is performed.

In the solid-state image pickup device 2, various timing controls such as opening / closing control of an electronic shutter are performed according to a control signal from the control system 9. Also, by this timing control,
The solid-state image sensor 2 is, for example, N which is one of the current broadcasting systems.
A video signal conforming to the TSC system is output to the camera signal processing unit 3.

The camera signal processing section 3 performs AGC (Auto Gain Control) control for adjusting the white balance of the video signal and gain adjustment of the signal level of the video signal in accordance with a control signal from the control system 9. To make these adjustments,
The camera signal processing unit 3 outputs, for example, a signal obtained by passing the camera signal processing unit 3 to the control system 9.

The voice signal processing section 5 collects the sound of the surrounding environment by the microphone 4 and converts this sound into, for example, a digital signal at the timing of the control signal from the control system 10. In the audio signal processing unit 5, PCM processing is performed on the converted digital signal to perform PCM coding. The audio signal processing unit 5 outputs the PCM coded digital signal, that is, the PCM audio signal and the analog signal, to the VTR according to the control signal supplied from the control system 10.
The signal is supplied to the signal processing unit 6.

The VTR signal processing section 6 is a voice signal processing section 6
And the video / audio signal based on the video signal from the camera signal processing unit 3 are output via the output terminal 10. By supplying this video / audio signal to the display, it is possible to monitor the situation in which this camera-integrated 8 mm VTR has taken a picture. A control signal for generating a VTR signal corresponding to the VTR format is supplied from the control system 9 to the VTR signal processing unit 6. VTR signal processing unit 6
Has an analog audio signal processing section for decoding the PCM audio signal and converting it into an analog signal when the recording / reproducing system 7 reproduces the PCM audio signal from the magnetic tape.

Further, the VTR signal processing section 6 converts the video signal from the camera signal processing section 3 into a digital signal.
This digital video signal is output to the video memory unit 8 according to the memory control signal of the control system 9. The VTR signal processing unit 6 converts the digital video signal output from the video memory unit 8 into an analog signal according to the memory control signal of the control system 9. Some models of the VTR signal processing unit 6 are provided with a digital signal processing unit for the supplied video signal in order to perform special effect processing.

The video memory unit 8 is composed of, for example, a field memory or a frame memory. Video memory unit 8
As described above, the control system 9 controls the writing / reading of a signal to / from the memory.

The recording / reproducing system 7 records a moving image or a still image on a recording track of a magnetic tape through a rotary magnetic head provided on a rotary head drum for supplying a video signal and an audio signal supplied from the VTR signal processing section 6 during recording. It is recorded as a picture. When recording a still image, the image information of one still image may be continuously recorded from the video memory unit 8 over several frames.

Further, at the time of reproduction, the recording / reproduction system 7 reproduces the video signal recorded on the recording track of the magnetic tape as a moving image or a still image through, for example, the rotary head drum. The audio signal in the recording / reproducing system 7 is reproduced via a fixed head for audio, for example.

An access marker switch (not shown) is provided as a scanning means for recording the start position mark or index mark of the search target identification information, and the control system 9 allows the user to record a still image. Reproduction start identification information S by the access marker switch when performing
_M and reproduction end identification information E _M are input. The access marker switch and the still image recording switch may be provided as a shutter button, and also used as a flash switch. The flash-dedicated switch may also function as a normal recording start switch used by the user for moving images.

Further, the frame signal forming one screen by two field signals, that is, the field signals C and D of FIG. 2 are temporarily stored in the video memory unit 8, and the next mark number n + 1 is detected. If the video memory unit 8 is repeatedly output up to, it is possible to continuously output a high-quality signal as compared with the case of outputting a field signal.

With this configuration, for example, if the search target identification information is recorded when the recording is performed by the shutter operation of the access marker switch in the still image recording mode, the moving image and the still image easily captured in the reproduction mode are separated. It is possible to play back only still images. The camera-integrated 8 mm VTR can shorten the playback time while displaying only the video that the user desires.
By shortening this time and reproducing only the scene required for recording, the camera-integrated 8 mm VTR can be made to have an album-like function.

Next, a description will be given of the operation of high-speed feeding in the reproduction mode in which reproduction is performed by a general stationary type 8 mm VTR. The stationary 8 mm VTR is basically composed of the VTR signal processing unit 6, recording / reproducing system 7, video memory unit 8 and control system 9 shown in FIG. By performing helical scanning while rotating the magnetic head, oblique recording tracks are formed on the magnetic tape. The magnetic tape 20 travels and moves in the direction of arrow L in FIG. As a result, the oblique video signal recording track V, the video sub-code area V _SC ,
The PCM audio recording area A _PCM is recorded by helical scanning of the magnetic head. The video memory unit 8 outputs image information to the recording / reproducing system 7 via the VTR signal processing unit 6 at the timing of reading the memory control signal from the control system 9. The recording / reproducing system 7 records the image information read from the video memory unit 8 on the video signal recording track V.

This stationary 8 mm VTR has a function of stopping the reproduction and shifting to the mechanical control mode when a predetermined reproduction time AP has elapsed as shown by the timing of the reproduction control signal in FIG. In the 8 mm VTR, the user inputs a start position mark S _M (start marker), which is one piece of search target identification information, in real time at the time of recording in the video subcode area V _SC of FIG. 3, for example, via an access marker switch. This start position mark S _M may be driven multiple times as shown in FIG. 3 by pushing once in anticipation of safety.

In the reproduction mode, the start position mark S _M is detected, and the detected recording track is used for a certain period AP.
After that, a search by mechanical control is performed until the next start position mark S _M is detected.

Further, as shown in FIG. 4, the user, implanted start position mark S _M of the video sub-code area V _SC of the recording track to the desired reproduction on the recording indicating the start of reproduction, the video sub-code region V _SC The end position mark E _M indicating the end of reproduction is driven in. These start position marks S
The recording of _M and the end position mark E _M is input via the access marker switch in real time during recording.

Here, for example, if a start position mark is recorded at the start point of still image recording at the time of recording and an end position mark is recorded at the end point of still image recording by the access marker switch, the still image and the moving image are reproduced. The recording area can be divided and reproduced.

A reproduction control signal is generated while detecting the pair of start position mark S _M and end position mark E _M ,
When the signal recorded on the magnetic tape 20 is reproduced according to the reproduction control signal, only the period edited by the user in real time is reproduced. This can significantly reduce the time required for editing. Therefore, complicated editing work can be simply performed. Also, it becomes easy to play only moving images and still images.

It is advisable to record the same identification signal over several fields in order to prevent dropout due to dropout or the like and prevent the so-called digest play or skip function from failing.

By recording in this way, it is possible to easily confirm the recorded contents during reproduction, and it is possible to shorten the time required for editing.

By operating as described above, when the cue scanning of the video signal recorded on the recording track of the magnetic tape is performed, the image information reproduced immediately before this high-speed reproduction is taken into the storage means. By repeatedly reading from the storage means during this high-speed feed period, the image is continuously output even during the high-speed feed period during reproduction, and the time required for content confirmation is greatly shortened. It is possible to continuously reproduce only for a desired period while performing high-speed feeding without causing a feeling of strangeness or giving stress to the user.

Further, in the present invention, a start position mark and an end position mark are previously recorded as search target identification information at the time of recording, and at the time of reproduction, image information from the corresponding recording track immediately before the end position mark is recorded. By loading in the storage means and repeatedly reading it, it is possible to reproduce the image information from the storage means instead of the screen by so-called mute processing and always display only the period requested by the user. By operating in this way, the time required for editing work can be further shortened.

Further, by writing the image information of one field immediately before the start of the high-speed feed to the storage means and repeatedly reading out the written image information until the high-speed feed is completed, the no signal in the high-speed feed period is eliminated. By avoiding this, it is possible to provide a function of turning over an album, for example.

Further, by writing the image information of one frame immediately before the start of the high-speed feed to the storage means and repeatedly reading the written image information until the high-speed feed is completed, the image quality of the field image information is higher than that of the field image information. While outputting the frame image information, it is possible to avoid no signal during the high-speed feed period. As a result, the time for confirming the contents can be shortened, and the market can be expanded by adding a function from the viewpoint of the user.

Although it has been described that the format of the recording / reproducing system in this embodiment is the standard of 8 mm VTR,
It is obvious that the present invention is not limited to this format and can be used for video tape recorders of any format.

[0050]

In the video signal reproducing apparatus according to the present invention, when the reproduction is performed after the high-speed feeding to the position of the search target identification information recorded in advance on the recording track of the tape-shaped recording medium, immediately before the start of the high-speed feeding. The reproduced image information is stored in the storage means, and the image information is repeatedly read out from the storage means during the high-speed feed period, so that the image is always output during the reproduction period.

Further, in the present invention, the start position mark and the end position mark are recorded beforehand as the search target identification information at the time of recording, and the image information from the corresponding recording track immediately before the end position mark is recorded at the time of reproduction. By loading in the storage means and repeatedly reading it, it is possible to reproduce the image information from the storage means instead of the screen by so-called mute processing and always display only the period requested by the user. By operating in this way, the time required for editing work can be further shortened.

Further, by writing the image information of one field immediately before the start of the high-speed feed to the storage means and repeatedly reading the written image information until the end of the high-speed feed, there is no signal within the high-speed feed period. By avoiding this, it is possible to provide a function of turning over an album, for example.

Further, by writing the image information of one frame immediately before the start of high-speed feeding to the storage means and repeatedly reading the written image information until the high-speed feeding is completed, a higher image quality than the field image information is obtained. While outputting the frame image information, it is possible to avoid no signal during the high-speed feed period. As a result, the time for confirming the contents can be shortened, and the market can be expanded by adding a function from the viewpoint of the user.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining reproduction by high-speed feed scanning from a magnetic tape during reproduction by a video signal reproducing device according to the present invention.

FIG. 2 is a schematic block diagram of the video signal reproducing device.

FIG. 3 is a schematic diagram for explaining automatic reproduction from a magnetic tape during reproduction by the video signal reproducing device.

FIG. 4 is a schematic diagram for explaining high speed scanning when reproducing an arbitrary section from the magnetic tape during reproduction by the video signal reproducing apparatus.

FIG. 5 is a schematic diagram for explaining reproduction by high-speed feed in a conventional video signal reproducing device.

[Explanation of symbols]

V: Recording track for video signal I _REC: Identification information recording area S _M: Reproduction start identification information E _M: --- Reproduction end identification information --- Lens system --- Solid-state image sensor imager 3- --- Camera Signal processing unit 4 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Microphone 5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Voice signal processing unit 6 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ VTR signal processing unit 7 ・ ・ ・ ・··· Recording / reproducing system 8 ··· Video memory unit 9 ··· Control system 10 ··· Output terminal

Claims (4)

[Claims] 1. A video signal reproducing apparatus for reproducing a video signal recorded on a recording track on a tape-shaped recording medium, the search being pre-recorded together with the video signal recorded on the recording track on the tape-shaped recording medium. During the mode in which reproduction is performed after high-speed feeding to the position of the target identification information, the image information reproduced immediately before the start of this high-speed feeding is stored in the storage means, and the image information is repeatedly read from the storage means during this high-speed feeding period. A video signal reproducing device characterized by continuing. 2. A start position mark and an end position mark of the search target identification information are recorded on the tape-shaped recording medium, and image information of a recording track corresponding to a position immediately before the end position mark is stored in the storage means. The video signal reproducing apparatus according to claim 1, which is loaded. 3. The image information of one field immediately before the start of high-speed feed is written in the storage means, and the written image information is repeatedly read out until the high-speed feed is completed. Video signal playback device. 4. The image information of one frame immediately before the start of high-speed feeding is written in the storage means, and the written image information is repeatedly read until the high-speed feeding is completed. Video signal playback device.