JPH01140448A - Digital tape recorder - Google Patents

Abstract

PURPOSE:To simplify the user's work for afterrecording a start ID by controlling the title recorder so as to record the start ID=1 for a given period of time after recording the start ID=0 until the beginning of music is sensored. CONSTITUTION:An afterrecording switch 27 is pressed, and when the start ID=1 is recorded, the rewinding is performed until a tape position where the start ID=0 is recorded, and the start ID=0 is recorded until the beginning of music is sensored, and then the start ID=1 is recorded for the given period of time after the beginning of music is sensored by a music sensor means 18 from the level of a reproducing signal. Consequently, the user's work on the digital tape recorder is only to do setting an automatic afterrecording mode, adjusting approximately the tape position and pressing an afterrecording switch 27. By this method, the user's work on the digital tape recorder is thus simplified.

Description

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

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

In the rotary head type digital audio cheap recorder, the time to record start ID=1 is approximately 9 seconds, which is enough time to not miss anything even if the tape is run at high speed, and to ensure that rewriting can be done in a short time. It is defined as follows.

An example of a conventional digital tape recorder will be described below. FIG. 6 is a diagram showing the relationship between the main signal and the start ID. With reference to FIG. 6, a case will be described in which the position of start ID=1 on a tape on which start ID=1 is recorded is moved by a small amount of time during dubbing.

In FIG. 6, a is a main signal having a song interval from time t1 to time t3. b shows the state in which the start ID is recorded before dubbing, from time t2 in the middle of the song to time t.
Start ID=1 is recorded up to 4. When dubbing a tape like this to accurately locate the start ID from time t5, record the start ID = 0 once to indicate OK, and then accurately determine the tape position at time t5 at the beginning of the song. , d as shown in the start ID
=1 must be recorded from time t5 to time t5.

If you do not record start ID=O and start from time t5 at the beginning of the song.If you dubbing ID=1, the start ID=1 will be in the state from time t2 to time t5 as shown in θ, and accurate cue will be obtained. Not only is it impossible to do this, but in a rotary head type digital audio tape recorder, the time for start ID=1 is determined, and it is not possible to record start ID=1 for more than a predetermined time. In addition, when dubbing 1 star 14D on a tape recorded with the source shown in Figure 6, (a) as in source 1, there is a period of no signal level close to the noise level between songs. (b) Like source 2,
Similarly, when there is no applause or narration between songs, or there is no difference between the level during a song and the level between songs, the digital tape recorder user can also set the tape position at which the start ID = 1 starts to be recorded. In other words, after finding the beginning of a song by repeatedly fast forwarding and rewinding, start I at that tape position.
Check whether D=1 is recorded and enter the start ID
If =1 is recorded, record the start ID = O, play the main signal again, find the beginning of the song, and set the start ID.
It was necessary to record =1.

Problems to be Solved by the Invention When dubbing a start ID using the conventional digital tape recorder described above, the digital tape recorder user first searches for a tape position where start ID=1 is to be recorded, and then records the start ID at that tape position. Check whether start ID = 1 is recorded. If start ID = 1 is recorded, rewrite the part where start ID = 1 is recorded to start ID = O, and as a result, the tape Since the position moves, it is necessary to record start ID=1 for a predetermined period of time after pressing the tape position where start ID=1 is to be recorded again. Was.

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 recording 7 start IDs using the 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 music start detection means for detecting the beginning of a music piece from the level of the reproduced main signal, and an after-recording system with start ID=1. a dubbing switch for instructing, a tape position storage means for storing the tape position when the dubbing switch is pressed, a start ID determining means for determining whether start ID=1 is recorded, and start ID=1. or a start ID control means for recording start ID=O, and a manual dubbing mode for recording start ID=1 for a predetermined period of time from the tape position where the dubbing switch is pressed when dubbing the start ID; When the 77 record switch is pressed, the start I
If the D determining means determines -1 from the start, rewind the tape to the tape position where the start ID=O,
When the dubbing mode switching means sets the manual dubbing mode, after recording start ID=0 to the tape position stored in the tape position storage means, recording start ID=1 for a predetermined period of time, and switching to the manual dubbing mode. When the switching means is set to the automatic dubbing mode, the system controller records the start ID=O until the song start detection means detects the beginning of the song, and then controls the start ID=O to be recorded for a predetermined period of time. It is equipped with the following.

Operation The present invention uses the above-described configuration to start from the beginning of the first song of a signal such as source 1 shown in FIG. 6 with ID=1.
When recording a digital cheap recorder, the user should set the automatic dubbing mode and start recording in the middle of the n-1st track or
- There is no need to move the tape position between the first and second songs and align the tape position exactly with the beginning of the first song.If you press the dubbing switch, start ID = 1 will be recorded on the tape. If start ID=1 is recorded, rewind to the tape position where start ID=O is recorded, record start ID=O until the beginning of the song is detected, and then start playing. The track start detection means detects the start of the track based on the level of the signal and can record start ID=1 for a predetermined period of time.The digital tape recorder user's work is to set the automatic dubbing mode and roughly adjust the tape position. , it's as simple as pressing the dubbing switch. In addition, when recording start III=1 from the beginning of the mth track of a signal such as source 2 shown in bK in FIG. 5, the digital tape recorder user sets the manual dubbing mode and When you adjust the tape position to the beginning and press the dubbing switch, the tape position where the dubbing switch was pressed is memorized and the start I is recorded on the tape.
Check whether D=1 is recorded and enter the start ID
If =1 is recorded, rewind to the tape position where start ID = O is recorded, record start ID = o to the memorized tape position, and start ID = 1 from the memorized tape position. Since recording can be performed for a predetermined period of time, the work of the digital tape recorder user is as simple as setting the manual dubbing mode, aligning the tape position with the beginning of the song, and pressing the dubbing switch.

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 in one 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
3 is a preamplifier, 3 is a MCU 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 Fig. 2, and 6 is a starch converter. 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. 9 is a head mounted on the cylinder of the mechanism 21; 1o is a tape recorded in the pattern shown in FIG. 2; 11 is a playback amplifier; 12 is a separator that separates the PCM signal and subcode signal; 13 14 is a 9-person converter;
6 is a line amplifier, 16 is an output terminal, and 17 is a start ID from the subcode signal separated by the separator 12.
This is a subcode decoder that obtains signals such as Reference numeral 18 is a song start detection unit that determines that the beginning of a song is the beginning of a song when the playback signal level exceeds the silence detection level again after the playback signal level has reached the silence detection level, which is a level close to silence, for 2 to 6 consecutive seconds. be. 19 is a mechanism controller that controls the mechanism 2o in response to commands from a system controller 21, which will be described later; 20 is a mechanism that drives the tape 1o, records signals on the tape 1o by the head 9, and drives the tape 1o; Regenerate the signal from 10. 21 is a system controller that controls the entire digital chip 7" recorder. 22 is a system controller that controls the entire digital chip 7" recorder. 22 is a system controller that controls the entire digital chip 7" recorder.
It is a start ID control unit that controls recording of D=O, and 2
3 is a predetermined time generation unit that controls the time to record start ID=1, 24 is a start ID determination unit that determines whether the reproduced start is 0 or 1, and 26 is the output of the subcode decoder 17. A tape position storage unit stores the absolute time recorded in the subcode area of the tape from the signal as the tape position, and 26 is an ar-y v
:r mode) - When the automatic dubbing mode is set at the switching section and the dubbing mode switch 28, the control means is controlled from the start by the output signal of the song beginning detection section 18. When the manual dubbing mode is set, the start ID control means is controlled by the output signal of the tape position storage section 26.

From the start ID control unit 22 to the dubbing mode switching unit 26
The main parts up to this point are included in the 7-stem controller 21. 27 is a dubbing switch that commands dubbing of the start ID, 28 is a dubbing mode switch for selecting automatic dubbing mode and manual dubbing mode, and dubbing switch 27 and dubbing mode switch 28 are connected to the system controller 21. There is.

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 (reproduction signal) and the absolute time from the start of the subcode and on the tape. The reproduced signals shown in a and b in Fig. 4 and c
, from the combination with the start ID before dubbing shown in d,
The case where the start ID shown in e is recorded by dubbing will be explained.

First, a playback signal having a song interval from time t1 to time t5 as shown in a in FIG. 4 is recorded in the PCM area in FIG. When dubbing a tape whose start ID is recorded in the subcode area in FIG. 2 for a predetermined time from t2, as shown in O in FIG. 4, the start ID=1 is recorded for a predetermined time from time t5 at the beginning of the song. , since there is a no-signal section between the songs, the automatic dubbing mode is set using the dubbing mode switch 28, and when the dubbing switch 27 is pressed after setting the tape position to time t3, the system controller 21
At judgment step 31 in the MfJ3 diagram, it is determined that the dubbing switch 27 has been pressed, and the process proceeds to judgment step 32. In judgment step 32, since the automatic dubbing mode has already been set by the dubbing mode switch 28, in judgment step 33, the output signal of the subcode decoder 17 causes the start ID determination unit 24 to select the subcode area of the tape 10. Check the recorded start ID. Here, if the dubbing switch 27 is pressed while the tape position is between time t2 and time t5, the start ID determination section 24 determines that the start ID is 1, and the process proceeds to step 34, where the start ID is set to o. A post-processing step 35 in which a command is output to the mechanism controller 19 to rewind the tape 10 until the determination unit 24 makes a determination, and the tape is rewound until time t2.
leading to. In addition, if the dubbing switch 27 is pressed while the tape position is before time t2, judgment step 3
3 leads to processing step 36. In processing step 36, the start ID control unit 22 outputs a command to the subcode encoder 5 to record start ID=O, and the system controller 21 instructs the switch 8 that the head 9 traces the PCM area of the tape 1o. When tracing a subcode area, a command is output to select the reproducing amplifier 11, and when tracing a subcode area, a command is output to select the recording amplifier end, and a command is output to the mechanism controller 19 so that the mechanism runs at a constant speed. In judgment step 3e, when the song start detecting section 18 detects the beginning of the song, processing proceeds to step 37, where a signal indicating the beginning of the song is input to the dubbing mode switching section 26, and the start-in control section 22 is determined by the predetermined time generation section 23. A command is output to the subcode encoder 5 to record start ID=1 for a predetermined period of time. As a result, the start ID from time t2 to time t3 is automatically changed from 1 to o without adjusting the tape position to time t3, and furthermore, start ID = 1 is recorded for a predetermined time from time t3 at the beginning of the song. .

Next, the reproduced signal shown in b in FIG. 4 and the start I shown in c in FIG.
When dubbing a tape on which D has been recorded and recording start ID = 1 for a predetermined period of time from time t3 at the beginning of the song as shown in θ, the level between songs is not close to no signal, but is at the same level as during one song. Therefore, the song start detection section 18 cannot detect the beginning of the song, so the manual dubbing mode is set using the dubbing mode switch 28, the tape position is set to time t5, the dubbing switch 2 is pressed, and the system controller 21
In judgment step 31 of FIG. 3, it is determined that the dubbing switch 27 has been pressed, and the process proceeds to judgment step 32.
Then, in judgment step 32, it is determined that the manual dubbing mode is set, and the process proceeds to judgment step 38. In the determination step 3, at time t3, the start ID 24 determines that the start ID=1, and the process proceeds to step 39. In processing step 39, the tape position storage section 25 stores time information on the tape, which is the output signal of the subcode decoder 17, and performs processing step 40. A decision step 42 is reached via a processing step 41 . Processing step 40 and processing step 41 correspond to processing step 34 and processing step 35 described above, respectively, and perform similar processing.

In judgment step 42, if the time information on the tape, which is the output signal of the subcode decoder 1a, matches the tape position stored in the tape position storage section, processing proceeds to step 37, and the dubbing mode switching section 26 determines the tape position. outputs to the start ID control section 22 that the start 4D=l should be recorded.
All commands are output to the subcode encoder 6 to record 1. As a result, the start ID from time t2 to time t3 is automatically changed from 1 to 0.

In addition, the reproduction signal shown in b of FIG. 4 and the start I shown in d of FIG.
When recording the tape recorded by D with start ID=1 from time t5 by dubbing, set the manual dubbing mode with the dubbing mode switch 2, set the tape position to time t5, and press the dubbing switch 27t41.
As described above, the system controller 21 goes through judgment step 31, judgment step 32, and reaches judgment step 38.

In judgment step 38, at time t5, start In=O, which leads to processing step 37, and the start ID
=1 will be recorded for a predetermined period of time.

As described above, according to the present embodiment, the song start detection section 18 detects the beginning of a program from the level of the reproduced main signal, the dubbing switch 27 instructs to record start ID=1, and the dubbing A tape position storage unit 26 that stores the tape position when the switch is pressed, and a start I
Start ID to determine whether D=1 is recorded or not
Discrimination unit 24 and start ID=1 or start ll1
A start ID control unit 22 for recording start ID = 0, a predetermined time generation unit 23 for recording start ID = 1 for a predetermined time, and a start ID control unit 22 for recording start ID = 1 for a predetermined time. Start ID
A post-recording mode switching unit 21 and a post-recording mode switch 28 control a manual post-recording mode in which the start ID=1 is recorded for a predetermined period of time and an automatic post-recording mode in which the start ID=1 is recorded for a predetermined period after the song start detection unit 18 detects the beginning of the song. , when the dubbing switch 27 is pressed, the start ID determination unit 2
4 determines that start ID=1, start rD
When the tape is rewound to the tape position where =o and the dubbing mode switching unit 26 has set the manual dubbing mode, after recording start ID = 0 to the tape position stored in the tape position storage unit 26, Time start ID
If the dubbing mode switching section 26 has set the automatic dubbing mode, the start ID=0 will be recorded until the beginning of the song is detected by the song start detection section 18, and then the start ID=0 will be changed for a predetermined period of time. By providing a system controller 21 that controls the recording, when dubbing start rD-1 at the beginning of a playback signal with no signal between songs as shown in 4 in FIG. The user sets the automatic dubbing mode using the dubbing mode switch 28, and the tape position does not need to be precisely aligned with the beginning of the song; simply by moving the tape before the beginning of the song and pressing the dubbing switch 27, the tape position is adjusted to the beginning of the song. Not only can you dub -1 from the start for a predetermined time from time t5, but even if start ID=1 was previously recorded, it can be automatically re-recorded to start ID=o by time t3 at the beginning of the song. . In addition, when dubbing start ID=1 at the beginning of a playback signal that has applause, narration, etc. between songs and has no level difference with the middle of the song, as shown in FIG. 4b, the digital tape recorder user should: If you set the manual dubbing mode with the dubbing mode switch 28, set the chief position to time ts at the beginning of the song, and press the dubbing switch 27, the start ID will be automatically set even if start ID = 1 is recorded before time t5. =O is recorded again at time t5
Starting ID=1 can be recorded for a predetermined period of time. Therefore, users of digital cheap recorders do not need to check the start ID before dubbing, and if start ID = 1 is recorded, they do not need to re-record the start ID = O before dubbing. For tapes with no-signal areas, it is not necessary to precisely align the tape position. Therefore, we can provide a digital cheap record that is very easy to use.

In this embodiment, the tape position storage section 25 stores the absolute time recorded on the tape in order to store the tape position, but the tape position storage section 26 stores the absolute time recorded on the tape.
To store the tape position, the count value of a tape counter, which is usually found in a digital tape recorder, may be stored.

Effects of the Invention As described above, the present invention provides a track start detection means for detecting the start of a program from the playback signal level, an after-recording switch for instructing to record start ID=1 while playing back the main signal, and an after-recording switch for instructing recording of start ID=1 while playing back the main signal. A tape position storage means for storing the tape position when the switch is pressed, and a start ID.
Start ID discriminating means for determining whether or not =1 is recorded; and if start ID D = 1, start ln = 0;
a start ID control means for recording a start ID;
a predetermined time generating means for recording D=1 for a predetermined time;
When recording the start while playing back the main signal, start from the tape position where the dubbing switch was pressed. Manual dubbing mode in which ID=1 is recorded for a predetermined period of time, and start ID after the song start detection means detects the beginning of the song. If the start ID determining means determines that the start ID is 1 when the dubbing switch is pressed, the automatic dubbing mode is set to -0 from the start. When the tape is rewound to the tape position and the dubbing mode switching means sets the manual dubbing mode, after recording the start ID=o to the tape position stored in the tape position storage means, the start ID=o is recorded for a predetermined period of time. 1 is recorded, and when the dubbing mode switching means sets the automatic dubbing mode, start ID=o is recorded until the song start detection means detects the beginning of the song, and then start ID=0 is recorded for a predetermined period of time. When dubbing start ID=1, by providing a system controller that controls the
Digital tape recorder users check the start ID before dubbing, and if Start I 1) = 1 is recorded, there is no need to re-record the start ID = 0 before dubbing. For tapes with no-signal areas, it is not necessary to precisely align the tape position. Therefore, we can provide a digital cheap record that is very 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 schematic diagram of signals recorded on the tape, and Fig. 3 is a part of the processing of the system controller of this embodiment. Figures 4 and 5 are waveform diagrams showing the time relationship between the playback signal and the start ID signal before dubbing and the start ID signal after dubbing, and Figure 6 is for comparison of signal levels between songs. FIG. 5...Subcode encoder, 17...Subcode decoder, 18...Track head detection unit, 19°...
・Mechanism controller, 21...System controller, 22...Start ID control unit, 23...
...Predetermined time generation unit, 24...Start ID determination unit, 26...Tape position storage unit, 26...Dub-recording mode switching unit, 27...Dub-recording switch, 2
8...Dub recording mode switch. Name of agent: Patent attorney Toshio Nakao and one other person
3 Figure, C8 Tsuyu large --

Claims (1)

[Claims] A song start detection means for detecting the start point of the program, that is, the beginning of the song from the level of the reproduced main signal; and an after-recording switch for instructing to record a start ID=1 indicating the start point of the program while reproducing the main signal. , a tape position storage means for storing the tape position when the dubbing switch is pressed; a start ID determination means for determining whether or not start ID=1 is recorded; Start ID control means for recording, predetermined time generation means for recording start ID=1 for a predetermined time, and start ID control means for recording start ID=1 for a predetermined time;
When recording D, there is a manual dubbing mode in which start ID=1 is recorded for a predetermined time from the tape position where the dubbing switch is pressed, and a start ID=1 is recorded for a predetermined time after the song start detection means detects the beginning of the song. an automatic dubbing mode switching means for controlling an automatic dubbing mode; and when the dubbing switch is pressed and the start ID discriminating means determines that the start ID is 1, the tape is wound to a tape position where the start ID is 0; and if the dubbing mode switching means is set to manual dubbing mode,
After recording start ID=0 up to the tape position stored in the tape position storage means, start ID=0 is recorded for a predetermined period of time.
1, and when the dubbing mode switching means sets the automatic dubbing mode, start ID=0 is recorded until the song start detection means detects the beginning of the song, and then start ID=0 is recorded for a predetermined period of time. What is claimed is: 1. A digital tape recorder comprising: a system controller for controlling the digital tape recorder;