JPH11213629A - Video tape player - Google Patents

Abstract

(57) [Problem] To simultaneously reproduce a plurality of VCRs on a screen of an image display device by simultaneously reproducing videotapes simultaneously recording the same subject with a plurality of VCRs on a plurality of VTRs and displaying the same on a screen of an image display device. Synchronize easily. A video tape playback mechanism capable of controlling a playback speed in accordance with a playback speed control signal, an input terminal for receiving an audio signal for synchronization from outside, and audio reproduced by the video tape playback mechanism. The characteristic of the signal and the characteristic of the audio signal for synchronization taken in from the input terminal are respectively detected, and the characteristics of the two are compared. The reproducing speed in the video tape reproducing mechanism is adjusted so that the time relationship between the two characteristics matches. An audio feature detection device having a function of outputting a reproduction speed control signal for control is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape reproducing apparatus, and more particularly to a screen synchronizing control apparatus for synchronously processing video signals simultaneously reproduced by, for example, a plurality of video tape reproducing apparatuses. Used for home video tape recorder (VTR).

[0002]

2. Description of the Related Art In general, a video tape in which the same subject is simultaneously recorded by a plurality of video camera recorders (VCRs) may be reproduced on a plurality of VTRs and displayed on a screen. In such a case, conventionally, in a professional VTR used in a broadcasting station, it is possible to add time frame number data for each image. Simultaneously reproduced images can be temporally synchronized.

On the other hand, a home VTR does not have the function of adding the time frame number data to each screen as described above, so that the same subject is simultaneously recorded by a plurality of VCRs (for example, the same subject). A television receiver (TV) that simultaneously reproduces a video tape (recording a television broadcast program simultaneously on a plurality of VTRs) on a plurality of VTRs
It is difficult to synchronize (coincide) a plurality of reproduced images with each other in time when the images are simultaneously displayed on a screen of an image display device.

[0004]

As described above, in a conventional VTR, a video tape in which the same subject is simultaneously recorded by a plurality of VCRs is simultaneously reproduced by a plurality of VTRs and simultaneously displayed on a screen of an image display device. In this case, there is a problem that it is difficult to match a plurality of reproduced images in time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is possible to synchronize a reproduced image with an audio input signal from another device in time. A video tape that can easily and temporally synchronize multiple playback images when video tapes recorded at the same time are simultaneously played on a plurality of video tape playback devices and simultaneously displayed on a screen of an image display device. It is an object to provide a playback device.

[0006]

A video tape reproducing apparatus according to the present invention comprises a video tape reproducing mechanism capable of controlling a reproducing speed in accordance with a reproducing speed control signal, and an external synchronizing audio signal. The input terminal, the characteristic of the audio signal reproduced by the video tape reproducing mechanism and the characteristic of the synchronization audio signal fetched from the input terminal are respectively detected and compared, and both characteristics are compared. An audio feature detection device having a function of outputting a playback speed control signal for controlling a playback speed in the video tape playback mechanism so that the time relationship is the same is provided.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a part of a VTR 10 according to a first embodiment of the present invention. In the VTR 10 shown in FIG. 1, reference numeral 11 denotes a video tape on which an audio signal and a video signal are recorded, 12 denotes a video tape running drive system, and a video which can control the reproduction speed of the video tape 11 according to a reproduction speed control signal. This is a tape playback mechanism.

Here, (1) the same subject is stored in a plurality of VCs
An operation mode in which video tapes recorded simultaneously with R are simultaneously reproduced on a plurality of VTRs including this VTR and images displayed simultaneously on a screen of a television receiver or the like are synchronized with each other. At the same time as recording on an audio tape with another audio tape recorder, reproducing the video tape on a VTR and displaying an image to be displayed on a screen of a television receiver when the audio tape is reproduced on an audio tape reproducing device. An operation mode for synchronizing with an audio signal output; (3) an operation mode for synchronizing a reproduced image with an audio signal output from a microphone when reproducing a video tape such as a karaoke using a VTR; Shall be defined as

The VTR 10 shown in FIG. 1 is provided with a screen synchronization control unit 13 in order to realize the above-described screen synchronization control operation mode. The playback speed can be controlled in accordance with a playback speed control signal from the control unit 13.

The screen synchronization control unit 13 includes an audio / image storage device (semiconductor memory) 21 for temporarily storing reproduction signals (audio signals and video signals) reproduced by the video tape reproduction mechanism unit 12. , Voice feature detection device 2
2 and an input terminal 23 for receiving an audio signal for synchronization from the outside.

The input terminal 23 has (1) another VTR
(2) Audio tape playback device (not shown) A part of an audio signal output obtained by playing back a video tape at the same time (not shown) is branched and supplied as an audio signal for synchronization. A part of the audio signal output obtained by playing back the audio tape at the same time is branched and supplied as a synchronization audio signal. (3) A part of the microphone audio signal output is branched and synchronized. May be supplied as an audio signal.

The audio feature detection device 22 (1) calculates the characteristics of the audio signal read from the audio / image storage device 21 and the characteristics of the synchronization audio signal fetched from the input terminal 23 by a microcomputer. Or a microcontroller) to detect and compare the two features, so that the time relationship between the two features matches,
The video tape playback mechanism 12 has a function of outputting a playback speed control signal for controlling the playback speed.

Note that the audio feature detection device 22 may always perform the above-described functions, but may perform the above-described functions only when the screen synchronization control operation mode is designated. It may be configured.

On the other hand, the reproduced signals (audio signal and video signal) reproduced by the video tape reproducing mechanism 12 are:
After being subjected to signal processing by a normal video tape reproduction signal processing circuit unit (not shown), the signal is output in a state of being separated into, for example, a video signal and an audio signal. John receiver) 30.

The audio signal output from the VTR 10 of FIG. 1 to the outside of the apparatus is partly branched as necessary, and is used for synchronization in another VTR having the same screen synchronization control operation mode as the VTR 10 described above. Used as audio signals.

<First Embodiment> FIG. 2 shows the VTR 10 of FIG.
Is operated in a screen synchronization control operation mode used simultaneously with another VTR 20.

In this case, the signal source that supplies the audio signal for synchronization to the input terminal 23 of the VTR 10 is another VTR 20, and the plurality of VTRs 10 and 20 simultaneously record the same subject with the plurality of VCRs. It is assumed that the video tape is operated so as to start the reproducing operation almost simultaneously.

The audio characteristic detecting device 22 detects the characteristic of the audio signal reproduced by the video tape reproducing mechanism 12 and the characteristic of the synchronizing audio signal from another VTR 20 taken in from the input terminal 23, The playback for controlling the playback speed in the video tape playback mechanism unit 12 so that the characteristics of the two are temporally coincident (that is, the playback screen of the VTR 10 is synchronized with the playback screen of the video tape in the other VTR 20). Outputs speed control signal.

The reproduced signals (audio signal and video signal) reproduced by the video tape reproducing mechanism section 12 are output in a state of being separated into a video signal and an audio signal, and supplied to the television receiver 30.

That is, according to the VTR 10 of FIG. 1, the reproduced video signal and the audio signal are supplied to the television receiver 30 as in the case of the conventional VTR, so that the image of the video signal is displayed on the screen. At the same time, an audio output of the audio signal is generated.

Therefore, as shown in FIG. 2, a video tape in which the same subject is simultaneously recorded by a plurality of VCRs is shown in FIG.
In the case of simultaneous reproduction on a plurality of VTRs including the VTR 10 and simultaneous display on the screens of the different television receivers 30 and 40, respectively, by the function of the audio feature detection device 22 as described above, The playback screen of the VTR 10 is synchronized with the playback screen of another VTR 20, and the playback images of the plurality of television receivers 30 and 40 can be temporally matched (synchronized).

Further, since the audio / image storage device 21 is inserted, the punctuality of the reproduced audio signal / video signal is ensured, and the comparison / detection of the audio signal by the audio feature detection device 22 is first performed. It is possible to execute. As a result, it is possible to reproduce a stable image without flicker on the display screen of the reproduced video signal.

The plurality of VTRs 10 and 20 are
All may be the VTR of FIG. 1, but may also include a conventional VTR that does not have a screen synchronization control operation mode. <Second Embodiment> A certain subject is recorded on a video tape by a VCR and simultaneously recorded on an audio tape by another audio tape recorder, and the video tape is reproduced by the VTR 10 of FIG. When displaying an image, the audio signal output when an audio tape recorded by another audio tape recorder (not shown) is reproduced by an audio tape reproducing device (not shown) at the same time as the recording by the VCR is used for synchronization. From the input terminal 23.

In this case, the reproduction screen / audio signal output of the VTR 10 shown in FIG. 1 is synchronized with the audio signal output of another audio tape reproducing apparatus according to the first embodiment by the function of the audio feature detecting device 22. Becomes possible.

<Third Embodiment> When a video tape such as karaoke is reproduced using the VTR 10 shown in FIG. 1, an audio signal output from a microphone (not shown) is taken in from the input terminal 23 as an audio signal for synchronization.

In this case, by using the function of the audio feature detecting device 22, the reproduction screen / audio signal output (performance output, etc.) of the VTR 10 in FIG. 1 is synchronized with the audio signal output of the microphone according to the second embodiment. Becomes possible.

In other words, the reproduced image of the VTR 10 shown in FIG. 1 advances according to the song of the microphone user (singer). When playing a video tape with a conventional karaoke apparatus, there is an inconvenience of singing along with a reproduced image of the karaoke apparatus.

[0028]

As described above, according to the present invention, it is possible to temporally synchronize a reproduced image with an audio input signal from another device.
A video tape that can easily and temporally synchronize multiple playback images when video tapes recorded at the same time are simultaneously played on a plurality of video tape playback devices and simultaneously displayed on a screen of an image display device. A playback device can be provided.

Further, according to the present invention, a certain subject is set to VC
At the same time as recording on a video tape with R, recording on an audio tape with another audio tape recorder and playing back the video tape and displaying the image on the screen of the image display device, playing back the audio tape with the audio tape playback device The playback screen / audio signal output of the video tape can be synchronized with the audio signal output at this time.

Further, according to the present invention, when a video tape such as karaoke is reproduced, it is possible to synchronize the reproduction screen / audio signal output (performance output, etc.) of the video tape with the audio signal output of the microphone.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a connection relationship between a part of a VTR and an external device according to a first embodiment of the present invention.

FIG. 2 is a connection system diagram showing one usage example of the VTR of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... VTR, 11 ... Video tape, 12 ... Video tape reproduction mechanism part which can control reproduction speed, 13 ... Screen synchronization control part, 21 ... Sound / image storage device (memory), 22 ... Sound feature detection device 23, an input terminal for taking in an audio signal; 30, a television receiver;

Claims (5)

[Claims] A video tape playback mechanism capable of controlling a playback speed in accordance with a playback speed control signal; an input terminal for receiving an audio signal for synchronization from outside; The characteristic of the audio signal and the characteristic of the audio signal for synchronization fetched from the input terminal are respectively detected, and the characteristics of the two are compared. A video tape reproducing apparatus comprising an audio feature detecting device having a function of outputting a reproducing speed control signal for controlling a reproducing speed in a section. 2. The video tape reproducing apparatus according to claim 1, further comprising: an audio / image storage device for temporarily storing an audio signal and a video signal reproduced by said video tape reproducing mechanism. The feature detection device detects a feature of the audio signal read from the audio / image storage device and a feature of the synchronization audio signal fetched from the input terminal, and compares the two features. Video tape player. 3. The video tape reproducing apparatus according to claim 1, wherein an audio signal output obtained by reproducing a video tape by another external video tape reproducing apparatus is used for synchronization with the input terminal. A video tape playback device supplied as an audio signal. 4. The video tape reproducing device according to claim 1, wherein an audio signal output obtained by reproducing an audio tape by an external audio tape reproducing device is supplied to the input terminal for synchronization audio. A video tape playback device supplied as a signal. 5. The video tape reproducing apparatus according to claim 1, wherein an audio signal output of a microphone is supplied to the input terminal as an audio signal for synchronization.