JPH01149261A - Digital tape recorder - Google Patents

Abstract

PURPOSE:To simplify the operation by rerecording the part of a start ID=1 to be as of a start ID=0 when the start ID=1 is discriminated by a start ID discriminating means after passing a prescribed time from the time when a afterrecording is commenced. CONSTITUTION:A time start ID=1 to be controlled by a 1st-time generating means 23 at the time of commencing the afterrecording is recorded, and afterward a time start ID=0 to be controlled by a 2nd-time generating means 24 is recorded, whereas a system controller 18 is provided to control the rerecording of the part of the start ID=1 to be of the start ID=0, when the start ID=1 is discriminated by the start ID discriminating means 25 after passing the 2nd-time. Consequently, even when a position of the start ID=1 before afterrecording is delayed within or > the 2nd-time from the beginning of music, the start ID=1 cannot be longer than a prescribed time. By this method, it is not necessary for the user to rerecord the previously recorded start ID=1 to be the start ID=0, thus simplify his work.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention makes it possible to independently record a subcode such as start ID-1 indicating the beginning of a song on a tape on which the main signal of music or the like has already been digitized and recorded. This relates to digital tape recorders. Hereinafter, the recording of only Start III will be referred to as dubbing.

2. Description of the Related Art In recent years, digital cheap readers have acquired information about signals,
For example, devices have been put into practical use that allow a subcode such as start xD=1 indicating the beginning of a song to be recorded simultaneously with the main signal or while reproducing the main signal.

In a rotary head type digital audio tape recorder, the time to record start XD=1 is approximately 9 seconds, so that even if the tape is run at high speed, no data will be missed, and rewriting can be done in a short time. Determined and layered.

Below, two examples of conventional digital tape recorders will be described. FIG. 5 is a diagram showing the relationship between the main signal and the start ID. With reference to FIG. 5, a case will be described in which the position of start ID=1 on a tape on which start XD=-1 has been recorded is moved for dubbing.

In FIG. 5, g is a main signal having a song interval from time t1 to time t2. h and 1 are start IDs before dubbing, h is a start ID from time t5 to time t6, and 1 is a start ID from time t4 to time t7 for a predetermined time xD=
1 is recorded. In order to accurately locate the beginning of the tape recorded in this way, if start I n = 1 is recorded for a predetermined period of time from time t2 to time t5, as a result, the tape h is recorded from time t2 to time t6 as shown in j. Until then, start ID=1 is recorded on tape 1 from time t2 to time t7 as shown in k. Therefore, the start ID=1 is recorded for a longer time than the predetermined time for recording the normal start ID=1. In order to prevent the start ID=1 from being recorded for a longer time than the predetermined time, the digital tape recorder user should record the -degree start ID.
After re-recording the part where =1 is recorded as start ID=O, start ID=1 must be recorded for a predetermined period of time from time t2.

Problems to be Solved by the Invention In the conventional digital tape recorder described above, when dubbing start ID=1 from the beginning of a song, the digital tape recorder user first presses the tape position at which start ID=1 is to be recorded. Start ID from that tape position
Checks whether =1 is recorded from the start during a predetermined time for recording =1, and if start ID =1 is recorded, the part where start ID =1 is recorded is started As a result of rewriting D=O, the tape position moves, so after pressing the tape position where start ID=1 is to be recorded again, it is necessary to record start XD=1 for a predetermined period of time. This had the problem of forcing complicated work.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a digital tape recorder that can simplify the work of the user when dubbing a start ID with a digital tape recorder.

Means for Solving the Problems In order to solve the above-mentioned problems, the digital tape recorder of the present invention includes a first time generating means for setting the time to record the start ID=1, and a first time generating means for setting the time to record the start ID=O. a second time generating means for setting the time to record the second time, a start ID determining means for determining whether the reproduced start II) is 1 or 0, and when dubbing is started, the first time generating means controls the After recording the time start ID=1 controlled by the second time generating means, the time start ID=o controlled by the second time generating means is recorded, and when the second time elapses, the start I
If the D determining means determines that the start ID=1, the system controller is provided for controlling the start ID-1 portion to be rerecorded as the start ID-0.

Effects of the present invention With the above-described configuration, when a tape on which =1 is recorded from the start is recorded from a tape position that is delayed by some time from the beginning of the song, the start ID = 1 is re-recorded from the beginning of the song. After recording start ID=1 for the first predetermined time, start ID=0 is recorded for the second time, so the position of start xD=1 before dubbing is delayed within the second time from the beginning of the song. If there is, start ID =
1 will never be longer than the predetermined time. In addition, the position of start I n = 1 before dubbing is delayed by a second time or more from the beginning of the song, and after the second time has elapsed, the start
If the determining means determines that the start ID=1, the start ID=-+ portion is re-recorded as =O from the start, so that =1 from the start will not be recorded continuously for longer than the predetermined time. Therefore, if a digital tape recorder user has previously recorded the start I n
There is no need to re-record =1 in the start ID =O.

Embodiment Hereinafter, a digital tape recorder according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a digital tape recorder according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a signal recorded on tape. In Figure 1, 1 is an input terminal, 2
is a preamplifier, 3 is an AD converter, 4 is a PCM encoder that performs interleave processing to change the temporal order of the digital signal, adds an error correction code, etc., and creates a PCM signal to be recorded in the PCM area in Figure 2, 5 is a start Signals such as ID and absolute time are sent to subcode area I in Figure 2.
and a subcode encoder that creates a subcode signal to be recorded in the subcode area (hereinafter referred to as subcode area), 6 a mixer that mixes the PCM signal and the subcode signal, 7 a recording amplifier, and 8 a recording amplifier. This is a switch for switching playback, and connects the head 9 and recording amplifier 7 during recording, and connects the head 9 and playback amplifier 11 during playback.
During subcode dubbing, while the head 9 traces the subcode area, the head 9 sends PCM signals to the recording amplifier 7.
While tracing the area, it is connected to the reproducing amplifier 11. 9 is a head mounted on the cylinder of mechanism 21;
1o is a tape recorded in the pattern shown in FIG. 2, 11
12 is a reproducing amplifier; 12 is a separator that separates the PCM signal and the subcode signal; 13 is a PGM decoder that performs error correction on the PCM signal and deinterleave processing to restore the original temporal arrangement; 14 is a DAO inverter; and 15 is a DAO inverter. A line amplifier, 16 an output terminal, and 17 a subcode decoder which obtains signals such as a start ID from the subcode signals separated by the separator 12. 18 is a system controller that controls the entire digital tape recorder.

Reference numeral 19 denotes an after-recording switch for instructing start xD to start recording in the subcode area of the tape 1o, and is connected to the system controller 18. 2o is a mechanism controller that controls the mechanism 21 in response to commands from the system controller 18; 21 is a mechanism that drives the tape 10, records signals on the tape 10 by the head 9, and records signals from the tape 1o; Play the signal. 22 is start xD=1 or start ID=O
23 is a first time generating section that records start ID=1 for a predetermined time; 24 is a first time generator that records start ID=1 for a predetermined time;
This is a second time generation unit that records start ID=O for a second time. 25 is played start ID is 1 or 0
The discrimination section starts from the start. Reference numeral 26 denotes a tape position storage unit that stores the absolute time recorded in the subcode area of the tape from the output signal of the subcode decoder as a tape position. The system controller 1B is
It includes each main part from the start ID control section 22 to the tape position storage section 26, and is composed of a microcomputer.

The operation of the digital tape recorder configured as described above will be explained below with reference to FIGS. 1, 2, 3, and 4.

FIG. 3 is a flowchart showing part of the processing of the system controller 21, and FIG. 4 is a diagram showing the relationship between the main signal (playback signal), the start ID as a subcode, and the absolute time on the tape. The reproduced signal is shown in a of FIG. 4, and c
A case will be described in which the start ID shown in d is recorded by post-recording from the combination with the start ID before post-recording shown in d.

A playback signal with a song interval from time t1 to time t2 as shown by the turtle in Fig. 4 is recorded in the PCM area of Fig. A tape with start ID=1 recorded in the subcode area for a predetermined time from t4 is dubbed so that start ID=1 is recorded for a predetermined time from time t2 between songs, as shown in d in FIG. If the tape position is set to time t2
When the dubbing switch 19 is pressed at the same time, the system controller 18 determines in judgment step 31 in FIG. 3 that the dubbing switch 19 has been pressed, and proceeds to processing step 32. In processing step 32, the start ID control unit 22 records the predetermined time start ID D=1 controlled by the first time generation unit 23.
A command is output to the subcode encoder 5. Next, processing step 33 is reached, in which the start ID control section 22 generates a second time start I controlled by the second time generation section 24.
A command is output to the subcode encoder 5 to record D=O. Next, the process proceeds to judgment step 34, where the start ID determination unit 25 determines the start ID recorded in the subcode area of the tape 10 from the output signal of the subcode 17.
Determine whether is 0 or 1. If the start ID before dubbing is b in FIG.
At step 7, since the start ID is -0, the connector B39 is reached and the dubbing is completed. If the start ID before dubbing is C in Figure 4, at time t7, from the start = 1
Therefore, processing step 35 is reached. In processing step 36, the start ID determination unit 25 determines that start II)=0.
A command is output to the mechanism controller 20 to wind the tape 10 to the tape position where the determination is made, and at time t8
In this step, the start ID becomes O, and the process proceeds to step 36. In processing step 36, tape position storage unit 26
stores the time information on the tape, that is, the time t8, which is the output signal of the subcode decoder 17, and executes processing step 3.
It reaches 7.

In processing step 37, the start ID control unit 26 outputs an output to the mechanism controller 2o to rewind the tape to the tape position at which it is determined that the start ID has changed from 1 to 0, that is, to time t7, and starts at time t7. The process reaches a multi-processing step 38 where ID=0. In processing step 38, the start ID control unit 22
outputs a command to the subcode encoder 5 to record the start ID=o until the tape position stored in the tape position storage section 26, that is, time t8, and when the tape position reaches time t8, the dubbing is completed. This leads to connector B39. Note that processing step 32. Processing step 33. In processing step 38, the system controller 21 causes the switch 8 to select the playback amplifier 11 when the head 9 is tracing the PCM area of the tape 10, and to select the recording amplifier 7 when the head 9 is tracing the subcode area. A command is output to the mechanism controller 2o, and a command is output to the mechanism controller 2o so that the mechanism 21 runs at a constant speed.

As described above, according to the present embodiment, after recording start ID=1 for a predetermined period of time, the second time generation section 22 and start ID control section 22 for recording start ID=o for a second time, After the second time period has elapsed.

When the start ID determination section 25 determines whether the start ID reproduced from the tape 10 is 0 or 1 and the start ID control section 25 determines that the start ID=1, the start ID
Feed the tape to the tape position where =O, and enter the start ID.
A tape position storage unit 26 that stores the tape position where =O.
and the start after the second time has elapsed to the tape position stored in the tape position storage unit 26 I D = 1
By providing a system controller 18 that controls the part to be rerecorded at =o from the start, when the start ID = 1 is moved for a short time, the position of the start ID = 1 before dubbing is changed to the second position. If the delay is within hours, after recording =1 for a predetermined time from the start, start ID = o is recorded for a second time, so the part with start ID = 1 before dubbing remains, and the part with start ID = 1 remains. It will never be longer than the predetermined time. Also, if the position of start ID=1 before dubbing is delayed within the sum of the predetermined time and the second time, start II)=1 is recorded for the predetermined time, and start ID=o is recorded for the second time. After that, check the start ID resharpened from the tape and start I.
Since D=1 is determined by the start ID determining means,
Start In= from the start ID=1 part recorded before dubbing.

Therefore, ==1 will not be continuously recorded for longer than the predetermined time from the start. Therefore, there is no need for the digital tape recorder user to record the start ID=o in advance.

In this embodiment, the tape position storage unit 26 is configured to store the time information recorded in the subcode area of the tape, but the tape position storage unit 26 stores the rotation speed of the reel stand of the mechanism 21 or its calculation. It may be configured to store information obtained from the values.

Effects of the Invention As described above, according to the present invention, there is an after-recording switch that commands the recording of a start point (l)+=1 indicating the start point of a program while reproducing the main signal, and a start ID=1 or start XD=1. a start ID control means for recording o, a first time generation means for setting a time to record start ID=1, and a second time generation means for setting a time for recording =O from the start. , a start ID determining means for determining whether the reproduced start XD is 1 or 0, and when the dubbing switch was pressed, a time start ID = 1 was recorded, which was controlled by the first time generating means. After that, the time start ID=O controlled by the second time generating means is recorded, and if the start ID discriminating means determines that the start ID=1 after the second time elapses, then the start ID=1 from the start. By providing a system controller that controls the part to be re-recorded at Start In=O, when moving =1 from the start to dubbing, the digital tape recorder user can record the part from the start to =1. Start ID=1 can be recorded for a predetermined time simply by aligning the tape position to record the recording and pressing the dubbing switch.Start ID=1 will not be recorded continuously for longer than the predetermined time, so if the start ID=1 is recorded in advance, There is no need to re-record from 1 to 0. Therefore, it is possible to provide a digital tape recorder that is extremely easy to use.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a digital tape recorder according to an embodiment of the present invention, FIG. 2 is a plan view showing an outline of signals recorded on the tape, and FIG. FIGS. 4 and 5 are waveform diagrams showing the time relationship between the reproduced signal and the start ID signal before dubbing and the start ID signal after dubbing. 6...Subcode encoder, 17...
・Supcoat tecoder, 18... System controller, 19... Dubbing switch, 20...
...Mechanism controller, 22...
Start ID control unit, 23...first time generation unit, 24...second time generation unit, 26...
...Start ID signal section, 26... Tape position storage section. tS--System controller 2nd Figure 1θ Figure 3

Claims (1)

[Claims] an after-recording switch that commands recording of start ID=1 indicating the start point of a program while reproducing the main signal; a start ID control means for recording start ID=1 or start ID=0; A first time generating means for setting recording time, and a start ID=
a second time generating means for setting the time to record 0; and a start I for determining whether the reproduced start ID is 1 or 0.
D discrimination means and when the dubbing switch is pressed,
After recording the time start ID=1 controlled by the first time generation means, recording the time start ID=0 controlled by the second time generation means, and when the second time elapses, the start ID If the determining means determines that the start ID=1, the start ID=1 part is set as the start ID.
1. A digital tape recorder comprising: a system controller that controls the recording to be rerecorded to zero.