JPH0233773A - Rotary head type digital audio tape recorder - Google Patents

Abstract

PURPOSE:To automatically form a read-in area in a tape beginning part and hence to improve the operability by detecting a tape top and performing a required record including a silent part in response to whether it is the tape beginning part or not. CONSTITUTION:When a recording mute button 5 is on, and the beginning part of a magnetic tape is detected by a top sensor 3, a control part 4 is set with its built-in timer at 1sec, etc., and meanwhile digital data 'O' is recorded in a PCM area of the tape T, while 'OBB' in a subcode area, and subsequently in a similar manner 'OAA' is recorded for 4sec similarly to the case of nondetection of the beginning part to form the silent part. By this recording system, the read-in area is automatically formed in the tape beginning part, and hence the operability is promoted by utilizing this area.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The present invention relates to an improvement in the record mute function in a rotary head digital audio tape recorder (R-DAT).

[Technical background of the invention and its problems]

The Refmu 1 function mentioned above is used to create a silent section before recording a song, etc., and in the conventional R-DAT, it was used to create a certain amount of silent section when a predetermined operation key was pressed once. There is something.

Note that this review 1 function records digital audio signals as digital data in the PCM area.
A silent part is formed by recording ζ"0".

By the way, in R-DAT, in addition to programs such as music, so-called U-TO is made up of ID information, recording time information, recording address information, etc. of recorded programs.
Information called C can be recorded at the beginning of the tape.

However, in order to record the above v-'Foc, a U-' lead-in area called the lead-in area must be placed at the beginning of the tape.
It is necessary to set up a recording area exclusively for TOC in advance.
There was a problem that recording operations were time-consuming. Note that the lead-in area is identified by predetermined data determined by the R-DAT standard, and by performing this identification, writing and reading of the U-TOC are performed.

(Object of the Invention) An object of the present invention is to improve the record-mute function of an R-DAT so that a lead-in area is automatically formed at the beginning of the tape, thereby improving operability.

[Summary of the Invention] In the record mute function of the R-DAT, if the position of the magnetic tape is at the top of the tape at the time of reflex mute, the present invention allows the recording of PN○ data at the same time as forming a silent section.
B"' to form a lead-in area.

〔Example〕

FIG. 1 is a block diagram 1 showing the configuration of an embodiment of the present invention.

In the figure, 1 is a rotating tram equipped with a magnetic head, 2
1 shows a cassette half storing a magnetic tape T, and shows a state in which the cassette half is attached to a non-rotating mechanical part and the magnetic tape T is partially wound around the rotary head 1.

3 is a top sensor for detecting the tape top of the magnetic tape T, which optically detects the transparent leader tape and magnetic material portion attached to the end of the magnetic tape T using an infrared diode and a photo transistor. do.

Reference numeral 4 denotes a control section consisting of a system controller 1 roller, etc., which controls tape running and data recording/playback, and also controls recorder 1 and recorder 1 with control functions to be described later.
Control functions.

5 is a RECMUTE button connected to the control section 4, and when this RECMUTE button 5 is pressed, a record operation is started.

FIG. 2 is a flowchart showing the control flow of the control section 4, and the control is started in a recording standby state.

The control unit 4 performs RF, CMUT E, and
When the button 5 is turned ON, it is determined whether the tape is currently at the top based on the output of the top sensor 3.

As a result of the determination, if the tape position is not at the top of the tape, the controller 4 sets a 4-second time-up time in an internal timer and starts timing, and starts running the magnetic tape T and rotating the rotating drum 2. Slurp.

Then, according to the timing of the timer, the digital data ° "0" is placed in the PCM TiJf area.
Disk data ``OAA'' as a PNO disk in the area
' is recorded for 4 seconds, and when the 4 seconds of recording of the PCM area and subcode area is completed, the recording mode is put into the REC/PAUSE state and stands by.

As a result of the determination of the output of the top sensor 3, if the tape position is at the top of the tape, a time-up time of 1 second is set in the timer and timing is started, and the running of the magnetic tape T and the rotation of the rotary drum 2 are started. Starting, digital data "0" is recorded in the PCM1 area, and digital data "OBB'" is recorded as PNO data in the subcode area.

Then, when the PCM area and the subcode area are recorded for one second based on the time measurement by the timer, "O" is recorded in the PCM area and P
Record “'OAΔ゛” of NO for 4 seconds, then REC
/Put into PAUSE state and wait.

In addition, the PNO day “OA” recorded in the subcoat area
A'' is not identified as a program number according to the R-DAT standard, and is data that does not affect playback or search operations.

The tape on which the silent portion is recorded in the above manner becomes, for example, as shown in FIG. 3. In other words, as shown in Figure (a), in the middle of the tape, the PNO disk is
A silent section corresponding to OA A''' is formed for 4 seconds, and as shown in FIG. , followed by PNO Dake "' OA
A silent section corresponding to 4 seconds is formed.

In this way, at the top of the tape, PN○daydayOBB"' indicating the lead-in area is recorded at the beginning of the silent section, so the UTOC notation B, ?il
area can be secured.

In the above embodiment, the tape top detection means is constituted by the top sensor 3 that optically detects the leader tape. It may be possible to memorize this information so that it can be determined whether the tape is at the top or not.

Further, the lead-in area may be formed as in the above embodiment when the recording standby state is set at the beginning of the tape without using the RECMtJTE button.

It goes without saying that the tape top detection means may be other than the above-mentioned I/P sensor 3 as long as it can detect the beginning of the tape.

〔Effect of the invention〕

As explained above, according to the present invention, in the R-DAT, when the position of the magnetic tape is at the top of the tape during the record mute operation, the PN○ data is recorded as "OBB"' at the same time as a silent section is formed. By doing so, a lead-in area for recording the U-TOC is automatically formed at the beginning of the tape, improving operability such as recording operations.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a flowchart related to the embodiment, and FIG. 3 is a diagram showing a recording example in the embodiment. 1...Rotating drum, 2...Cassette half, 3...
・Top sensor, 4...Control unit, 5...RECMU
TE button, T...magnetic tape.

Claims (1)

[Scope of Claim] A rotary head digital audio tape recorder having a record mute function for forming a silent section on a magnetic tape, comprising tape top detection means for detecting the beginning of the magnetic tape, the tape top detection means detecting the beginning of the tape. A rotary head type digital audio device that detects the beginning, records a silence signal in a PCM area, and records data indicating a lead-in area in a recording area for recording a program number in a subcode area. Tape recorder.