JPH0770206B2 - Recording / playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to DAT (Digital Audio Tape recorder) and VT.
It is applied to R, CD (Compact Disc), VD (Video Disc), etc., and records the recording elapsed time from the recording start end on recording media such as tapes that record music signals, video signals, data signals, etc. Absolute Time: Below, A-
(Referred to as Time)).

[Prior Art] When recording the above A-Time, for example, a DAT
Will be described as an example.

FIG. 4 is a flow chart for explaining the recording operation of the conventional recording / reproducing apparatus. As shown in FIG. 4, when the tape, which is an example of the recording medium, is loaded (step 10), the mode is changed to the recording mode. It is possible (hereinafter referred to as REC OK) (step 11).

FIG. 5A shows the recording position on the tape and A- in the above case.
The relationship between the recording position and A-Time is directly proportional to the recording position. In this state, when performing new recording on the tape between the distances (L1), A-Time (TA), (TB), the recording / reproducing apparatus sets A-Time: (TA) before starting recording. For reading and new recording, A-Time continues from (TA), and the continuity of A-Time at the recording position is ensured. At this time, continuity is ensured in A-Time (TB) at the recording position, which is the new recording end position.

Since the conventional recording / reproducing apparatus is configured as described above, as shown in FIG. 6 (A), when recording is started in the unrecorded area after the recorded area is removed, Ti
The continuity of me is lost.

This will be described in detail. Even though the already-recorded portion ends at the recording position, the tape mounting is performed at the position and new recording is performed at the distance (L2) between the positions. Therefore, the value of A-Time is 6th
It is between (TC1) and (TD1) indicated by the alternate long and short dash line in the figure (B). Here, the start time of the new recording is shown (TC1)
Is TC1 because the A-Time of the recorded part cannot be read.
= O, and therefore the values are different from the original A-Time, (TC), and (TD) shown by the dotted line in FIG. 6 (B).

[Problems to be Solved by the Invention] In the conventional recording / reproducing apparatus configured as described above, there is a problem that continuity of A-Time may not be ensured depending on the mounting position of the recording medium. .

The present invention has been made in order to solve the above-mentioned problems, and no matter what position the recording medium is mounted,
-An object of the present invention is to provide a recording / reproducing apparatus capable of ensuring the continuity of Time.

[Means for Solving the Problem] The recording / reproducing apparatus according to the present invention determines the position on the recording medium when the recording medium is mounted, and immediately moves to the recording mode when the position is a recorded portion. The recording is performed so that the recording absolute time is recorded following the recording absolute time that has already been recorded. On the other hand, if the position on the recording medium is an unrecorded portion, that position is recorded. If it is within a predetermined time from the start edge of the medium, if it is within the predetermined time, the recording mode is immediately entered and a new absolute recording time is recorded.If it is not within the predetermined time, the recording medium is reversed. It is possible to move to the recording mode based on the detection of the end of the recorded part or the detection of the recording start end by operating in the direction of the direction.If the end of the recorded part is detected, continue to the recording absolute time already recorded. Note The recording absolute time is recorded, and when the recording start end is detected, the recording absolute time is newly recorded.

[Operation] According to the present invention, when the recording medium is mounted on the recording / reproducing apparatus, the mounting position is discriminated, and when it is discriminated that it is an already recorded portion, it is possible to immediately shift to the recording mode. , The recording absolute time is recorded following the recording absolute time that has already been recorded, and if it is determined that the recording area is unrecorded, it is first determined whether the position is within a predetermined time from the recording medium start end. If it is within the specified time, the recording mode is immediately entered and the absolute recording time is newly recorded.If the position is not within the specified time from the beginning of the recording medium, the recording medium is operated in the reverse direction. When the end of the already recorded portion is detected or the recording start end of the recording medium is detected, it is possible to shift to the recording mode, and when the end of the already recorded portion is detected, it is already recorded. Recording absolute time Then, the recording absolute time is recorded, and when the recording start end is detected, the recording absolute time is newly recorded. Therefore, regardless of the mounting position of the recording medium, A
-Time will be recorded continuously.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a flow chart for explaining the recording operation of the recording / reproducing apparatus according to the embodiment of the present invention. As is apparent from the drawing, the tape mounting (step 20) which is an example of the recording medium is carried out. Then, it is determined whether the mounting position is the recorded portion or the unrecorded portion. The judgment is generally made by detecting the presence or absence of the envelope of the reproduced signal (step 21). However, when the reproduced signal is a digital signal such as DAT, a device is used to synchronize the signals. PL equipped in
It is also possible to use a signal indicating whether or not the L circuit (Phase Locked Loop) is operating normally.

Next, in the determination result in step 21, if it is the already recorded portion, REC OK is immediately made (step 25), and, for example, A-Time recording as shown in FIG. 5B is performed.

If the result of the determination in step 21 is an unrecorded portion, it is determined whether or not it is within a predetermined time (T3) from the beginning of tape winding (step 22). The determination is made, for example, by the numerical values of the tape take-up counter and the supply-side reel counter. The necessity of determining whether it is within the predetermined time (T3) is as follows. That is,
When the recording medium is a tape, the beginning of the tape is susceptible to physical damage, and the quality of recording is likely to deteriorate. Therefore, the beginning of the tape is avoided for recording. The length is, for example, as shown in FIG. 2, a distance (L3) on the tape, which corresponds to (T3) and is usually set to about 5 minutes. If the result of the determination in step 22 is within the predetermined time (T3), REC OK is set (step 25).

FIG. 2 shows the flow from step 22 to step 25. As shown in FIG. 2 (A), the tape was recorded from a position avoiding the length (L3) of the tape winding start. , If the tape mounting position is "REC", the recording immediately becomes REC OK, recording as shown in FIG. 2B is performed, and A-Time is recorded as shown by the dotted line in FIG.

If the result of the determination in step 22 indicates that the predetermined time (T3) or more has elapsed, a high-speed rewind (hereinafter referred to as FR) operation is commanded and the tape is rewound (step 23).

In the process of this FR operation, the end of the recorded area is stepped.
When it is detected in 21, REC OK is immediately performed, and recording of A-Time: TF to TG as shown in FIG. 2C is performed, and continuity from the recording position can be secured. If the recorded portion is not detected and the beginning of the tape is detected, REC OK is set at the detected position and the third position is detected.
Recording is performed as shown in the figure. That is, if the tape loading position is as shown in FIG.
Starting from FIG. 3B, A-Time is recorded as shown by the dotted line in FIG.

In the above-mentioned embodiment, the case of the DAT using the tape as the recording medium is explained, but the VTR, the optical disc, the CD
The present invention may be applied to other recording / reproducing apparatus, etc., and has the same effect as the above embodiment.

[Effects of the Invention] As described above, according to the present invention, if it is the already-recorded portion according to the determination of the mounting position of the recording medium, the recording mode is immediately entered, and the recording is continuously performed at the already-recorded absolute time. Record the absolute time, while if it is an unrecorded part,
First, it is detected whether the position is within a predetermined time from the recording medium start edge, and if it is within the predetermined time, the recording mode is immediately entered and the absolute recording time is newly recorded, and within the predetermined time. If the end of the recorded part is detected by detecting the end of the recorded part or the recording start end based on the backward operation of the recording medium, if the end of the recorded part is detected, it is already recorded. The recording absolute time is recorded following the existing recording absolute time, and when the recording start end is detected, the recording absolute time is newly recorded, so regardless of the mounting position of the recording medium,
The continuity of A-Time can be secured.

[Brief description of drawings]

FIG. 1 is a flow chart showing the operation of the recording / reproducing apparatus according to an embodiment of the present invention, FIGS. 2 and 3 are explanatory views showing the relationship between the recording position on the tape and A-Time, and FIG. Float chart showing the operation of the conventional recording and reproducing apparatus, No. 5
6 and 6 show the recording position and A-Ti on the tape of the conventional example.
It is explanatory drawing which shows the relationship with me. (T3) …… A predetermined time from the beginning of tape winding, (L3) ……
Distance on tape. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A recording / reproducing apparatus configured to record a recording elapsed time from a recording start end of a recording medium as a recording absolute time (A-Time), wherein a reproduction position on the recording medium when the recording medium is mounted is When the detection result of the first detection means is an unrecorded portion, not the recorded portion, the reproduction position is a fixed distance from the medium start end of the recording medium. The second detection means for detecting that it is within the range, the detection result of the first detection means is an unrecorded portion, and the detection result of the second detection means is that the reproduction position is from the medium start end of the recording medium. A recording medium moving unit that moves the reproduction position of the recording medium toward the recording medium starting end when the distance is not within a certain distance, and a third end that detects the end of the recorded portion of the recording medium during the operation of the recording medium moving unit. Detection means, on The recording medium moving means is provided with a fourth detecting means for detecting the medium start end of the recording medium during the operation, and by receiving the output of the first or the third detecting means, it is already recorded from the reproduction position. If the recording absolute time is recorded subsequently to the above recording absolute time, and the output of the second or fourth detecting means is obtained,
A recording / reproducing apparatus characterized in that the recording absolute time is newly recorded from the position.