JP3182771B2 - Video signal recording / reproducing apparatus and its video recording content display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal recording and reproducing apparatus for recording and reproducing video signals on a recording medium such as a magnetic tape.

[0002]

2. Description of the Related Art The amount of information that can be recorded on a tape cassette used in a video tape recorder (hereinafter referred to as a VTR) or the like is very large, and it is very difficult to search for a target position on a tape while reproducing. It will be labor. For this reason, conventionally, various methods have been employed for a method of searching recorded contents in a tape cassette.

An embodiment of a method for searching recorded contents in a VTR described in Japanese Patent Application Laid-Open No. 2-158983 will be described below.

FIG. 6 is a block diagram of a VTR, and FIG.
Is shown. In this VTR, when a tape cassette is mounted, first, an identification symbol for identifying the tape cassette is determined. The recording and reproduction of the video signal is performed by the video signal recording and reproducing head on the drum 701 in FIG. 7, and the cueing signal recording and reproducing head 702 records the cueing signal on the magnetic tape 704 at the start and end of recording. The tape position detection circuit 611 detects the number of revolutions of the take-up reel 706 and the running speed of the magnetic tape 704, calculates the position from the head of the tape, and sends it to the storage means 613. The analog-digital conversion circuit 610 converts the video signal into a digital signal and sends it to the storage means 613. When the cue signal is recorded, at least one of the tape position information of the cue signal and the video signal at that time is stored in the storage unit 613. When confirming the recorded contents of the tape cassette, first, the contents stored in the storage means 613 are read. Then, on the display unit 616 or an external display device, the identification code of the cassette tape mounted on the VTR, the recording position of the cue signal, and at least one of the video signals at that position are displayed to confirm the recorded contents. As described above, in the above conventional example, the recorded contents can be confirmed without reproducing the tape cassette and without adding any special equipment to the tape cassette. Even if the tape cassette is not mounted, if the identification code of the tape cassette is input, it is possible to know the position information and the content of the video signal at the time of recording the cue signal.

[0005]

In the above conventional example, the cueing signal is recorded not only when the cueing signal recording switch of the operation unit is operated, but also when a tape cassette is mounted or ejected, or when recording is started or ended. Sometimes done. At the same time, at least one of the tape position information and the video signal is stored in the storage means in correspondence with the identification symbol. The display unit has an identification code, tape position information,
Information of at least one of the video signals is displayed, and the recorded content is confirmed.

However, if the video signal at the time of recording the cue signal does not properly correspond to the recorded content, it is not possible to correctly recognize the recorded content only with the above-described stored content.

[0007] Further, in the above-mentioned conventional example, the display method on the display unit or the external display device is not specified, but when only one video signal can be displayed on one screen, the video signal is not searched one by one. I have to. Therefore, when the number of video signals to be searched in one tape cassette increases, the search becomes troublesome.

In the above conventional example, the recording position of the cue signal is displayed as a position or time from the head of the tape on a display unit or an external display device. However, when recording between two cue signals or when checking the remaining amount of tape, displaying the position or time from the beginning of the tape cassette is difficult to understand, and there is a possibility that recording may be erroneous.

An object of the present invention is to make it possible to confirm the recorded content even if the content of the video signal at the start of recording does not properly correspond to the recorded content. For this purpose, information other than the identification symbol, the video signal, and the tape position stored at the start of recording, for example, the date and time, is stored in the storage means. As another method, a plurality of video signals are automatically stored in the storage means during the period from the start to the end of recording, and are displayed when the recorded contents are confirmed. As another object, a plurality of video signals are projected on a display unit or one screen of an external display device, so that a quick search can be performed. Further, as another object, in order to prevent a shortage of recording time, an interval between any two cue signals and a remaining tape amount are obtained and provided from the tape position information stored in the storage means.

[0010]

According to the present invention, there is provided an information generating means for providing information such as a situation at the time of a cue signal recording, for example, date and time, and a video signal at an arbitrary time after the start of recording. Timer means for providing a control signal for storing signals in the storage means, video signal conversion means for reducing video signals so that a plurality of video signals can be displayed on one screen, and recorded on a magnetic tape There is provided a calculating means for calculating the remaining amount of the tape and the interval between any desired cue signals from the tape position information of the cue signal.

[0011]

According to the present invention, by providing the information generating means, information for causing the user to recognize the recorded contents other than the identification symbol and the tape position and the video signal at the time of recording the cue signal is generated and stored in the storage means. provide. Even if the video signal at the start of recording does not properly correspond to the recorded content, the recorded content can be confirmed from the above information.

Further, by providing a timer means,
A control signal is sent out at an arbitrary time after the start of recording, and a plurality of video signals are automatically stored in the storage means. Also in this method, when the video signal at the start of recording does not appropriately correspond to the recorded content, the recorded content can be recognized by checking a plurality of video signals stored thereafter. Further, the video signal conversion means takes in a plurality of video signals, reduces each of the video signals, and displays them on the display unit and one screen of the external display device. By doing so, it is possible to save the trouble of reading the video signal one screen at a time and to quickly search for the video signal.

Further, by providing the calculating means, the interval between any two cue signals, the remaining amount of the tape, and the like are obtained from the position information of the cue signal stored in the storage means. By displaying such information, shortage of recording time is prevented.

[0014]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a video signal recording / reproducing apparatus according to the present invention, FIG. 2 is a state diagram of a tape when a cue signal is recorded, and FIG. 3 is a tape cassette after recording in this embodiment. FIG. 4 is a diagram showing the contents stored in the storage means, FIG. 5 is a diagram showing a video signal obtained by dividing a television screen, and FIG. 7 is a diagram showing the configuration of a VTR used in the present embodiment. FIG. 8 is a diagram showing the contents of the reservation recording performed in this embodiment.

In this VTR, when the tape cassette 703 is mounted, an identification code is stored in the storage means 115.
The identification symbol is a symbol for the user to identify the tape cassette.

Here, it is assumed that scheduled recording of a television program is performed according to a schedule as shown in FIG. Note that the contents of the reservation are not limited to those listed here. The input reservation content is stored by the reservation content storage circuit 107. When the time of the clock circuit 120 reaches the recording start time of the reservation number 1, the recording of the video signal starts, and at the same time, the cueing signal 201
Is also recorded. At this time, the tape position calculation circuit 110 calculates the position where the cue signal 201 has been recorded based on the tape feed speed and the rotation speed of various motors sending the tape, and sends it to the storage means 115. The position calculated here is a position from the head of the magnetic tape, that is, an absolute position on the tape. At the same time, the analog-to-digital conversion circuit 112 converts the video signal 202 into a digital signal and sends it to the storage means 115.

Further, the contents of the reservation number 1 shown in FIG.
Sent to When the cue signal is recorded in the storage means 115, the identification code of the tape cassette 703, the position data where the cue signal is recorded, the video signal at the time of the cue signal recording, and the reservation content storage circuit 107 are stored. The contents of the reservation are stored. At this time, it is not always necessary to store all the contents of the reservation, and the storage information selecting unit 10
3 can select the information to be stored from the reservation information.

When the clock section 120 reaches the end time of the reservation number 1, the recording of the video signal on the magnetic tape 704 ends. Then, the position on the tape at the end of recording or the time from the start of recording is stored in the storage means 115, and the reservation state is established again. At the end of recording, it is not always necessary to record the cue signal, and the video signal and the contents of the reservation need not be stored. These selections are made by the storage information selection unit 103. Similarly, the same operation is repeated for the reservation numbers 2 to 4, and the reservation operation ends. The cue signals Sa301 to Sd304 shown in FIG. 3 are recorded at the beginning of the programs of the reservation numbers 1 to 4 on the magnetic tape after the end of the reservation recording.

FIG. 4 shows the contents stored in the storage means. Here, the stored contents are the information at the time of recording.

At a later date, the user of the VTR will read the storage means 115
The recorded content is confirmed by calling the video signal stored in the VTR and displaying it on the display unit 119 of the VTR main body or on the television screen 118. However, the cue signal Sa301
The video signals Da 406 to Dd 409 at Sd 304 to Sd 304 do not always appropriately correspond to the recorded contents. If not, the recorded contents cannot be recognized. However, if the recording time information is displayed here, the recorded contents can be easily confirmed from the information such as the date and time and the channel.

However, there are cases in which it is not possible to grasp the recorded contents even with the information at the time of recording. Therefore, the following operation is performed during reservation recording. For example, after the recording of the reservation number 3 is started, a control signal is sent from the timer circuit 113 at regular intervals. Times Ta310 to Tc31 according to the control signal.
Means 11 for storing the video signal and the tape position signal in
5 is stored. With this operation, even if the video signal at the start of recording does not properly correspond to the recorded content, the recorded content can be confirmed by displaying the video signal stored in the storage unit 115 thereafter. In addition, time Ta310-Tc312
It is not always necessary to record the cue signal on the magnetic tape, and the cue signal need not be the same type as the cue signal recorded at the start of recording. In the present embodiment, the video signal and the position signal are stored at regular time intervals, but this may be performed by designating an arbitrary time.

In this embodiment, as shown in FIG. 5A, a plurality of pieces of video information can be displayed on one screen. For example, when it is desired to confirm the recorded content of the reservation number 3, first, as shown in FIG.
Dd409 is projected on one screen. Next, the operation unit 102
When Dc303 is selected, Dc is selected as shown in FIG.
The video signals at c303 and at times Ta310 to Tc312 are displayed and can be confirmed immediately. In FIG. 5C, Dc303 does not always need to be displayed. In these processes, a plurality of video signals are read from the storage means 115 in the video signal conversion circuit 117, and each video signal is reduced and displayed. In this embodiment, the video signal conversion circuit 117 is provided after the storage means 115,
The video signal conversion circuit 117 may be inserted before the storage means 115. In this case, the storage means 115 stores the information in FIG.
The video signal is stored in the form shown in FIG. According to the latter example, the memory in the storage unit 115 can be effectively used.

If the user confirms the recorded contents and finds unnecessary information, the stored information selecting unit 103 can delete the information from the storage means 115. In this way, only the necessary information is stored, and the memory in the storage means 115 can be used effectively.

In the present apparatus, the remaining amount of the tape and the time interval or position interval between any two cue signals are calculated by the calculation circuit 114 based on the tape position information stored in the storage means 115. By displaying them, mistakes such as shortage of tape at the time of recording can be prevented.

In this embodiment, the reservation recording has been described. However, the cueing signal is recorded at the start of recording in the normal recording as in the case of the reservation recording. Then, the video signal, tape position information and recording time information at that time are similarly stored in the storage means. At the end of recording, the time from the start of recording or the recording end position is also stored in the storage means 115. When the video from the start to the end of recording is stored in the storage unit, the video can be stored by operating the operation unit 102 in addition to specifying the time in advance. Also, a cue signal can be recorded during recording. Other operations are the same as those of the embodiment of the present invention. Also, it is assumed that a cue signal can be recorded during the reproduction and any video can be stored in the storage means during the reproduction.

The storage means 115 is not limited to an IC memory or the like, but can be applied to any recording medium. Further, the storage means 115 does not necessarily have to be built in the VTR body, and may be provided outside.

In this embodiment, the tape position is determined from the relationship between the magnetic tape feed speed and the number of rotations of various motors. However, when a time code is recorded on the magnetic tape 704 from the beginning of the tape, that code is used. Should be read. That is, the position of the cue signal 201 may be represented as an absolute position on the magnetic tape.

Also, in this embodiment, the contents of the storage means are VT
The information is displayed on the display unit 119 of the R main body or the television screen 118, but the display is not limited to these two methods, and may be displayed by any method such as printing on paper.

In this embodiment, as the information at the time of recording the cue signal, only the date and time and the channel, which are the reservation contents, are stored in the storage means 115 in addition to the identification symbol, the video signal and the tape position. However, the contents to be remembered need not be limited to these,
The user inputs characters, pictures, and the like that the user wants to store from the storage information selection unit 103, and stores the information as storage information 115
It is good also as what can be memorized.

In this embodiment, a VTR has been described. However, the present invention can be applied to any video signal recording / reproducing device such as a disk device.

[0032]

According to the present invention, the situation at the time of cueing signal recording is stored and displayed in the storage means, so that the content of the video signal at the time of cueing signal recording does not properly correspond to the recorded content. The content of the video signal can be confirmed.
In addition, by storing the video signal in the storage means at an arbitrary time after the start of recording, the recorded content can be confirmed even if the video signal at the start of recording does not properly correspond to the recorded content. Further, the time between any two cueing signals and the remaining amount of the tape are obtained from the tape position information stored in the storage means and displayed, so that the shortage of the recording time does not occur. Further, by reducing a plurality of video signals and displaying them on one screen, it is possible to quickly search for the video signals. By these means, there is an effect that the search for the cue signal in the conventional recording / reproducing apparatus can be performed more reliably and quickly.

[Brief description of the drawings]

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

FIG. 2 is a state diagram of a tape when a cue signal is recorded.

FIG. 3 is a diagram illustrating a state of the tape cassette after recording is completed in the embodiment.

FIG. 4 is a diagram showing contents stored in a storage unit.

FIG. 5 is a diagram showing a divided television screen.

FIG. 6 is a block diagram of one embodiment of a conventional video signal recording / reproducing apparatus.

FIG. 7 is a configuration diagram of a VTR.

FIG. 8 is a diagram showing the contents of reservation recording performed in this embodiment.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-180578 (JP, A) JP-A-63-58690 (JP, A) JP-A-3-58370 (JP, A) 85731 (JP, U) JP-A-2-149182 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 27/10 G11B 15/087 G11B 27/00

Claims (2)

(57) [Claims] 1. A video signal recording means for recording a video signal on a recording medium, a timer for outputting a control signal a predetermined time after the start of recording of the video signal, a quantization means for quantizing the video signal, A video signal recording / reproducing apparatus having a storage means, wherein the storage means stores a video signal quantized by the quantization means at an output timing of the control signal. . 2. A video recorded content display method for displaying recorded content of a recording medium by a video signal recording / reproducing apparatus having a video signal reproducing means for reproducing a video signal recorded on a recording medium and a storage means, The recording means stores in advance identification information for identifying the recording medium, and at least one video signal stored at every predetermined time from the start of recording the video for each video stored in the recording medium, Among the stored video signals, video signals corresponding to each of the video images are displayed in a list on a display screen, and a selection instruction for any of the video images is received. A video recording content display method characterized by displaying video signals stored for each time in a list.