JPH06195950A - Reproducing device and recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide a reproducing device and the recording and reproducing device capable of easy search and scan based on time information of recording like the recording date or the recording time. CONSTITUTION:Date information is extracted as a digital signal from signals reproduced from heads 3 and 2 by a date information extracting circuit 9 and is sent to a system controller 12. The system controller 12 transmits date information to a capstan motor 13 through a servo controller 10 by the instruction from an operation switch 11 to realize date search and date scan. Date search indicates the operation of reproducing from the change of the indicated date, and date scan indicates the operation of repeated reproducing for a certain time at each change of the date.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus and a recording / reproducing apparatus, and more particularly to searching and scanning of its recording medium.

[0002]

2. Description of the Related Art Conventionally, in a helical scan type video tape recorder, at the start of recording, a signal indicating the head is automatically recorded, and the index search is performed by using this signal to find the head, and a fixed time for the head. An index scan in which reproduction is sequentially performed is known. Also, the signal can be input at the time of reproduction.

[0003]

In the above-mentioned conventional example,
In order to perform index search and index scan, it is necessary to record a dedicated signal on tape. Also,
Since the operation is performed by counting the recording start point, when searching for the transition of the date or the discontinuous portion of the recording time, it is necessary to search for that portion and input the index signal, which is inconvenient.

The present invention has been made to solve such a problem, and is a reproducing apparatus capable of easily performing a search and a scan based on time information about recording such as recording date, recording time and the like. The purpose is to provide a recording / reproducing apparatus.

[0005]

In order to achieve the above-mentioned object, in the present invention, a reproducing apparatus is configured as in the following (1) and a recording / reproducing apparatus is configured as in the following (2). .

(1) Reproducing means for reproducing information recorded on a recording medium, and time information extracting means for extracting time information about recording such as recording date and recording time from the output of the reproducing means. And a search / scan means for searching or scanning the recording medium based on the output of the information extracting means at this time.

(2) A recording / reproducing apparatus comprising recording means for recording required information on a recording medium and recording time information for the recording, and the reproducing apparatus described in (1) above.

[0008]

With the configuration (1), the time information regarding recording is extracted from the signal reproduced from the recording medium, and the recording medium is searched or scanned based on this time information. With the configuration of (2), required information is recorded on the recording medium, time information about the recording is recorded, and during reproduction, search and scan are performed in the same manner as in (1). .

[0009]

EXAMPLES The present invention will be described in detail below with reference to examples.
FIG. 1 is a schematic block diagram of a "video tape reproducing apparatus" which is an embodiment. As shown, as the drum 1 rotates, the information on the video tape is transferred to the ch1 head 2,
The data is reproduced by the ch2 head 3 and amplified by the reproduction amplifiers 4-1 and 4-2. After that, the signals of the reproduction amplifiers 4-1 and 4-2 are switched and selected by the selector switch 5. Changeover switch 5
Operates with a pulse a from the servo control 10. The video signal is reproduced by passing the signal output from the changeover switch 5 to the video signal processing circuit 7. Also,
PCM data can be taken out by the change-over switch 6. The change-over switch 6 operates by a pulse obtained by inverting the pulse a. Reference numeral 16 is an inverter indicating that the pulse a is inverted. The signal output from the change-over switch 6 is passed through a PLL (phase-locked loop) circuit 8 and a date information extraction circuit 9 to extract date information as a digital signal, which is sent to the system control 12. The operation timing of the date information extraction circuit 9 is determined by the pulse 15. By transmitting the date information thus extracted to the servo control 10, the capstan motor 1
Operate 3 to realize date search and date scan. The mode setting is performed by the operation switch 11.

The format of the time information about the recording used here is shown in FIG. CRCC is an error detection code. FIG. 3 shows the data structure of this time information (date, time), and shows the contents of FIG. FIG. 4 shows a structure of a track for recording the time information on the video tape. As shown, time information about recording is recorded in an area between the video signal area and the PCM (audio) signal area. This area "Post Amble, VP Guard" is a video signal and P
This is an area provided to prevent interference of CM signals.

Next, the operation will be described with reference to FIGS.

FIG. 5 is a flow chart of the date search. First, the date search mode is set (S1). Next, when the same date portion is regarded as one block, the number "d" indicating how many blocks before or after the current position of the tape to be searched for is input (S2). When fast-forwarding or rewinding from this state, the date data written in the data writing area in FIG. 4 is read (S4), and the value of d is decremented by 1 each time the date changes (S5), becoming 0. Playback is started from the point (S6) (S7). Note that d
If the tape becomes the end or the start before 0 becomes 0, the tape ends.

FIG. 6 is a flowchart of the date scan. After setting the date scan mode (S10),
Fast forward (S11). At this time, each time the alternate portion of the date data is detected (S12), reproduction is performed for a fixed time (S1).
3), and fast forward to the next alternate turn (S11). This operation is repeatedly stopped until the end of the tape.

In this way, in this embodiment, the troublesome work of searching for the place of the recording date on the recorded video tape and recording the cueing signal is automatically performed as needed, without the troublesome work. Search and scan can be performed by recording date.

In this embodiment, the search and scan are performed at the place of the date, but they may be made at the place of the year and month and at the discontinuous portion of the time.

Although the embodiment is a video tape reproducing apparatus, the present invention is not limited to this. For example, it can be implemented by a video tape recording / reproducing apparatus. In this case, recording means is provided for recording required information and recording time information about the recording.

The present invention is not limited to a magnetic tape such as a video tape as a recording medium,
It can be implemented in an appropriate device using a recording medium that records and reproduces in time series.

[0018]

As described above, according to the present invention,
It is possible to easily search and scan based on time information about recording such as recording date, recording time and the like.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment.

[Figure 2] Time information format

[Figure 3] Data structure of time information

[Fig. 4] Track configuration diagram

[Figure 5] Date search flowchart

[Figure 6] Date scan flowchart

[Explanation of symbols]

 1, 2 heads 9 date information extraction circuit 10 servo control 12 system control

Claims (2)

[Claims] 1. A reproducing means for reproducing information recorded on a recording medium, and a recording date from the output of the reproducing means.
A time information extracting means for extracting time information about recording such as recording time; and a search / scan means for searching or scanning the recording medium based on the output of the time information extracting means. Playback device. 2. Recording means for recording required information on a recording medium and recording time information about the recording,
A recording / reproducing apparatus comprising: the reproducing apparatus according to claim 1.