JPH01264685A - Recording system for digital recorder - Google Patents

Abstract

PURPOSE:To correctly record a music number by detecting a final music number recorded onto a tape and recording the music number, in which '1' is added to it, onto the tape. CONSTITUTION:By a microcomputer 14, the tape of a mechanism 11 is made to advance through a mechanism driving circuit 16 by a reproducing output from a detecting circuit 13, and when the final music number is detected, the music number is stored into a memory 15. The tape is made to advance further, and the tape is temporarily stopped at the time of a soundless part. Next, by a recording action, the '1' is added to the music number stored in the memory 15, and it is recorded as the music number onto the tape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital recorder, and more particularly to a recording method of a digital recorder suitable for subsequent recording on a partially recorded tape.

[Conventional technology]

Some conventional digital recorders (hereinafter abbreviated as DAT) are capable of recording a song number at the beginning of the song when recording the song. According to this device, the song number “1”
” begins at the position where the tape is loaded into the DAT and recording is started. The song numbers are incremented by 1 as each song is recorded one by one.

In this way, in conventional DAT, a song number is attached before the song recorded on the tape, so when playing back, the desired song can be selected according to the song number, similar to a compact disc player (CD). Can be searched.

Regarding the functions of the DAT mentioned above, please refer to the [[
The latest AV equipment and digital technology] is disclosed on page 26.

[Problem to be solved by the invention]

When you start recording by loading the recording source tape into the DAT with the above function, the song numbers will be recorded again starting from "1", and the song numbers will be duplicated, making it difficult to perform an accurate search. The problem was that it became impossible to do so.

For this reason, with conventional DATs, when re-recording onto a tape that has already been recorded, prior to recording, the regeneration mode is used to search for the song number of the last song and store it in the DAT. With this, it was necessary to search for an unrecorded or silent section and then stop the tape.

As described above, when trying to re-record a piece of music on a tape that has already been recorded using a conventional DAT without duplicating the song numbers, the problem arises that the operation is troublesome and the operability is poor.

An object of the present invention is to eliminate the problems of the prior art as described above, and to search for unrecorded or silent parts, search and store the song number of the last song prior to recording, and accurately record the song number. An object of the present invention is to provide a DAT recording method that achieves this.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a means for searching the song number of the last song recorded on a tape, a means for stopping the tape while leaving an unrecorded part or a silent part on the tape,
The present invention is characterized in that the digital recorder is provided with means for recording the song number of the last song searched.

[Operation] Prior to recording, an operation is performed to search for unrecorded or silent parts of the tape and to store the song number of the last song.

This allows recording to continue after the last song, so no tape is wasted. Moreover, since the song number starts from the song number of the last song stored with "1" added, there is no duplication.

〔Example〕

The present invention will be explained in detail below using the drawings.

The present invention will be described in detail with reference to FIGS. 3 to 6. Third
The figure shows the layout of the recording areas on the tape, where the border areas 1, 2, and 2' represent the recording areas, and the white areas 3 represent the non-recording areas. Note that the left side of the tape represents the rear, and the right side represents the front. In the recording section, 2 represents the final song, and 2' represents the recording section for the song number of the final song.

Now, when a tape on which a portion of the tape has already been recorded is mounted on a DAT for re-recording, the position of the magnetic head will be at position A, a position to the left of it, position B, or position C in the figure. However, the position of the magnetic head is A,
Recording cannot be started from either position B or C. Therefore, in the present invention, the position of the magnetic head for restarting recording is determined by the following method.

(1) When the first facing position of the e&ki head is the A position, the magnetic head faces the recording section of the tape, so there is a reproduction output. In this state, the tape is advanced as shown in FIG. 4 to search for unrecorded or silent parts. When the tape reaches a non-recording section or a silent section, there is no playback output, so it can be easily determined. Also, the song number 2' of the last song is stored during playback. After searching for unrecorded or silent parts, select the song break #
), the tape is stopped at position 4, leaving some unrecorded or silent parts. This completes the preparation for recording.

(2) When the first opposing position of the magnetic head is B position, it starts from the recording section and there is playback output, as in the case of the human position, but the song number is lost until the unrecorded section or silent section is searched. Without,
I can't remember this. Therefore, as shown in Figure 5, after searching for an unrecorded or silent section, advance the tape one step backwards, search for the song number of the last song, memorize this, and then turn the tape again. Move forward and search for unrecorded or silent sections. The subsequent operation is the same as in case (1) above.

(3) If the first facing position of the magnetic head is C position,
Since it starts from the unrecorded part, there is no playback output, and in this case, the 6th
As shown in the figure, the tape is advanced backwards and the song number of the last song is retrieved and stored. Thereafter, the tape is advanced forward to search for unrecorded or silent parts. The latter half of the operation is the same as in case (1) above.

The above operations can be performed at several tens to hundreds of times the speed during reproduction, and the search does not require the same amount of time as during normal reproduction.

When a non-recorded portion or a silent portion is searched for as described above, the recording operation then begins. In this recording operation, the song number is set to a value to which the song number KrIJ' of the last song is added.

Next, one embodiment of the present invention will be described with full reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a flowchart illustrating the operation of the microcomputer 14 shown in FIG.

In FIG. 1, 11 is a mechanism, 12 is a preamplifier, 16 is a detection circuit, 14 is a microcomputer, and 15
16 is a memory, and 16 is a mechanism drive circuit.

The operation of this embodiment will be explained below.

The output from the magnetic head within mechanism 11 is amplified to a predetermined level by preamplifier 12.

This output is input to the detection circuit 13 and detected, and the detected voltage (DC voltage) is input to the microcomputer 14. The microcomputer 14 is programmed based on the flowchart shown in FIG. 5, and stores the song number in the memo 1J15 depending on the respective state, and causes the mechanism drive circuit 16 to move the tape forward, backward, or stop at -. .

When there is no output from the magnetic head, there is no detection output from the detection circuit 13, and as a result, the microcomputer 14
performs operations based on the sequence in the mode in which there is no playback output.

Next, the operation of the microcomputer 14 will be explained in detail with reference to FIG.

First, it is determined whether the reproduced output is input from the detection circuit 13 (step 81). If there is a playback output, the process advances to step S2 and a command to advance the tape is output to the mechanism drive circuit 16. On the other hand, if there is no playback output, the process advances to step S3 and a command to retract the tape is output.

Next, it is determined whether there is a song number (step S4), and if there is no song number, the tape is retracted until the song number is played back (step S5).

When the song number is detected in step S4, the song number is stored in the memory 15 (step S6).

Then, the tape is further advanced (step S7).
, a determination is made whether there is silence (step 3).
8). If there is no such silent part, the tape is further advanced (step S9), and it is again determined whether there is a song number (step 510). If there is no song number, return to step S8; if there is a song number, return to step S8.
Return to 6.

If it is determined in step S8 that a silent section is rarely encountered, the process is temporarily stopped leaving a silent section for a predetermined time (step 511).

Although not shown, a recording operation is then started, and the song number is set to a value obtained by adding "1" to the song number stored in the memo IJK, and is recorded on the tape.

Note that the block diagram shown in FIG. 1 can be easily constructed using known techniques. That is, the preamplifier 12 is an amplifier with a band of about 5 MH2, and can be constructed from commonly available electric elements. The detection circuit 16 is, for example, as shown in FIG.
A configuration of a diode 21 and a capacitor 22 may also be used. As the microcomputer 14 and the memory 15, existing ones may be used, and no new ones are particularly required.

Although there are various configurations of the mechanism drive circuit 16, for example, when the motor is a DC brush motor, the circuit shown in FIG. 8 is often used.

In the figure, when the terminal 42 is set to a low potential and the terminal 43 is set to a high potential, the transistors 32 and 35 become conductive, and the motor 51
rotates forward (or reverse). Conversely, terminal 43 is set to low potential, 4
2 is set to a high potential, the motor 51 rotates in the reverse direction (or in the forward direction). As a result, the magnetic tape within the mechanism 11 moves forward or backward. In order to change the traveling speed of the magnetic tape, it is sufficient to change the voltage at the terminal 41 and change the voltage applied to the motor 51. Furthermore, for stopping at -, both terminals 42 and 43t- may be set to a high potential. Note that 36 to 40 in the figure are resistors, and 44 and 45 are terminals.

〔Effect of the invention〕

As explained above, according to the present invention, even when re-recording a tape on which one part has already been recorded, the unrecorded part or silent part is accurately searched and the song number of the last song is memorized, so that the song can be accurately recorded. You can record while recording the number.

Furthermore, since unnecessary unrecorded parts are not created or recorded parts are not mistakenly recorded, the tape is effectively used.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a flowchart for explaining the operation of this embodiment, Fig. 6 is a diagram showing the recording section and non-recording section of the tape, and Figs. FIG. 6 is a diagram explaining the position of the magnetic head when it is attached to each tape DAT and the principle of operation accordingly, and FIGS. 7 and 8 show specific examples of some of the above embodiments. It is a circuit diagram. 1.2...Recording section 2'...Recording section 3 for recording the song number of the last song...Non-recording section 11...Mechanism 12...Preamplifier 14...Microcomputer 16... Mechanism drive circuit. To N “・N

Claims (1)

[Claims] 1. In a digital recorder, a means for searching for the song number of the last song recorded on a tape, searching for unrecorded parts or silent parts on the tape, and leaving the necessary unrecorded parts or silent parts. A recording system for a digital recorder, comprising means for stopping a tape and means for storing a song number of the last song retrieved.