JPH0194584A - Pcm magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To enable program identification information to be recorded in a short time by recording the program identification information when first program time information stored in a storage means and a second program time information reproduced by high speed reproducing operation coincide. CONSTITUTION:An input means 1 and the storage means 2a inputting and storing the program identification information for identifying a program and the first program time information which corresponds to that program identification information and a control means 2 reproducing a magnetic tape at a high speed, reproducing the second program time information previously recorded on the magnetic tape by a magnetic head, comparing it with the first program time information and recording the program identification information in the prescribed area of the magnetic tape by said magnetic head when the first and second time information coincide are provided. Therefore, it is unnecessary for a recording operator (an user) to hear a monitor sound and the information is automatically recorded. Thus, the program identification information can be recorded in a short time and recorded on the correct position of the magnetic tape without an error.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to information signals (for example, analog signals such as music).
The PCM magnetic recording and reproducing device converts the signal into a digital signal and records and reproduces it on a magnetic tape using a magnetic head.In particular, among the information signals, it is possible to quickly and quickly record program identification information (such as track number, etc.). This relates to improvements to make it easier and more reliable.

[Conventional technology]

In addition to music (program) information, a PCM magnetic recording and reproducing device (DAT) is capable of recording and reproducing subcode information such as a song number (program number) and elapsed time of a song (program). Of these, the track number is essential information for high-speed music selection (high-speed selection), which is an important function of the DAT.Track number 0 is mainly recorded in the area where subcode information is recorded (subcode area). be done. Also, when recording the elapsed time of a song, the elapsed time of the six songs recorded in the subcode area at the same time as the song (music) includes the elapsed time of each song, and the elapsed time from the beginning of the first song, which is the time when recording started. There is cumulative elapsed time, which is cumulative time.

Fig. 5 is a block diagram showing the system of a conventional rotary head type digital audio tape recorder (R-DAT). In the figure, (19) inputs necessary information to a microcomputer (20). The operation button (21) for performing the song is a display unit connected to the microcomputer (20) and displaying the song number, elapsed time of the song, etc. (4) is a signal processing circuit, and (5) is a D/C circuit installed between this signal processing circuit (4) and the audio (song) output terminal.
A converter, (6) is an A/D converter that converts the audio (song) input signal into a digital signal, and (7) is a digital l10 (input/output) board provided for connection with other digital equipment. , (9) is an equalizer PL inserted between the signal processing circuit (4) and the recording/reproducing amplifier circuit (10).
The L circuit (11) is a servo circuit that controls a rotating drum (13) having a magnetic head (12) and a capstan (18) that drives a magnetic tape (14).

Note that the microcomputer (20) has a memory (
It has a built-in random access memory (20 m) that controls the servo system and inputs and outputs subcode information. Memory (20) in the microcomputer (20)
In addition to storing subcode information from the reproduced signal, a) also stores information inputted by the operation button (19) or the like.

FIG. 6 is an explanatory diagram illustrating the track configuration of the magnetic tape used in R-DAT. In the figure, (14) is the magnetic tape, (15a) and (15b) are optional tracks, (lea), ( tab) is a subcode area, and (17) is a program area (PCM area). The program area (17) is located at the center of the recording area of the magnetic tape. These parts can be rewritten independently. Therefore, it is possible to re-record the already recorded contents of the subcode area of the magnetic tape at any time without damaging the recorded signal (music) of the program area.

Conventionally, there have been two methods for determining the recording timing of a song number. The first method is for the recording operator (user) to press the program number recording button (not shown) included in the operation buttons (19) once the recording operator (user) recognizes the beginning of the song while listening to the monitor sound. The microcomputer (20) generates and records a recording command for the above-mentioned song number. In the second method, a level determination circuit (not shown) in the R-DAT detects a non-recorded portion between songs (between programs), and a microcomputer issues a recording command for a song number to record the unrecorded portion.

FIG. 7 is a flowchart illustrating the operation of a conventional device that implements the second method.

First, in step (S70), the device (R-DAT) is set to an operation mode (dubbing mode) in which the track number can be recorded during playback operation, and in step (S71), the track number is recorded in the program number area of the memory in the microcomputer. If the track number 0 is recorded (the track number is input using the operation button (19) and stored in the memory (20a)), the track number 0 is recorded (the track number is input using the operation button (19) and stored in the memory (20a)), and the track number 0 is recorded in the PNOM. If the magnetic tape number is stored, in step (S72), a starting edge detection sensor (not shown) detects whether or not it is the starting edge of the magnetic tape.

If it is the beginning of the magnetic tape, the initial value of the counter (PNOA) is set in step (S73). 1 stored in the program number area in step (S)4)
The th (PNOAth) song number is recorded in the subcode area (16a, 16b) on the magnetic tape.

Next, in step (S75), it is determined whether the stored song number still exists. If there is, in step (S78), it is detected whether or not it is the end of the magnetic tape using an end detection sensor (not shown) or the like. If it is not the end of the magnetic tape, it is determined in step (S77) whether the period in which the level of the reproduction signal reproduced from the program area of the magnetic tape is constant and lower than the bell A0 continues for a preset t seconds. If this continues for seconds, the contents of the counter (PNOA) are incremented by 1 in step (S78). Then, in step (S74), the second (PNOAth) song number stored in the program number area is recorded in the subcode area on the magnetic tape. Thereafter, the above steps (S74) to (S78) are repeated, and step (S7)
When there are no more stored song numbers in step 5), the magnetic tape stops running, and the song number recording operation ends in step (S79). Incidentally, if at step (S7i), even one song number is not stored, the process ends at step (S79).

If it is not the beginning of the magnetic tape in step (S72),
The magnetic tape is rewound. In step (S7)), if the reproduction signal level is constant and the period lower than the bell A0 does not continue for t seconds, the counter (PNOA) does not change. Further, if the end of the magnetic tape is detected in step (376), the running of the magnetic tape is stopped, and the recording operation of the track number is ended in step (S79).

Note that, as an apparatus for realizing the first method as the prior art, the determining element in step (S77) in the flowchart shown in FIG. The behavior will be changed to determine the Further, the same technique was used except that the recording operation of the song number in step (S74) was changed to the recording operator's operation of the program number recording button.

[Problem that the invention seeks to solve]

The problems with the above conventional technology are as follows.

Regarding the first method, it is necessary for the recording operator to listen to the monitor sound in order to record the song number (program identification information). Regarding the second method above, even if the recording operator does not need to listen to Monitor i, if there is a low audio signal level part close to a silent part in the song (program), the song number (program identification information) may be incorrectly recorded. recorded. In addition, in the case of music in which the song (program) is long and has no silent parts, such as recording at a concert venue, the necessary song number (program identification information) is not recorded.
A common problem with the second method is that it takes a long time to record the song number (program identification information).

This invention was made to solve these problems, and it is possible to automatically record program identification information (track number) without requiring the recording operator to listen to the monitor sound, and at a low audio signal level. To provide a PCM magnetic recording and reproducing device that can record necessary program identification information (track number) in a designated magnetic tape position regardless of the presence or absence of a disc, and that can record program identification information (track number) in a short time. purpose.

- [Means for solving the problem] The PCM magnetic recording and reproducing apparatus according to the present invention can input program identification information for identifying a program and first program time information corresponding to the program identification information. an input means, a storage means capable of storing the program identification information and first program time information inputted by the input means, second program time information reproduced by a magnetic head by high-speed reproduction of a magnetic tape; and control means for controlling the program identification information to be recorded in a predetermined area of the magnetic tape by the magnetic head when the program time information is compared with the first program time information and they substantially match.

[Effect]

In this invention, when the first program time information stored in the storage means and the second program time information reproduced by the high-speed reproduction operation are substantially matched, the program stored in the storage means is The timing of recording the identification information is controlled by the control means, and the predetermined program identification information is automatically recorded in a predetermined area of the magnetic tape.

〔Example〕

FIG. 1 is a configuration diagram showing a rotary head type digital audio tape recorder (R-DAT) in one embodiment of the present invention, and the operation button (1) corresponds to a song number (program identification information) and this song number. The input device is configured to allow a user (recording operator) to input in advance the performance time (first program time information) for each song. Memory (2a) is
A storage means is configured to store the song number inputted from the operation button (1) as the input means and the performance time of each song. The microcomputer (2) calculates the performance time of each song and the elapsed time of each song (second program time) played back in the normal playback mode and high-speed playback mode using the magnetic head from the subcode area of the magnetic tape. This constitutes a control means that calculates and compares the information (information) and controls the recording timing of the song number (program identification information).

The display section (3) displays the song number (program identification information) and the playing time of each song (first program time information) during presetting, and displays the song number and 11 songs during playback (high speed/normal). It is configured to display the elapsed time (second program time information) for each program. The rest of the configuration is the same as that in FIG. 5, which shows the conventional general system configuration of R-DAT.

FIG. 2 shows a track number (program identification information) input by operating an operation button (input means) in an embodiment of the present invention, which is recorded on a magnetic tape based on a command from a microcomputer (control means). A flowchart explaining the operation is shown.

FIG. 3 is a flowchart illustrating the operation of inputting a song number (program identification information) into the memory (storage means) of a microcomputer (control means) by operating an operation button (input means) in one embodiment of the present invention. Tables 1 and 2 show examples of the operation buttons (1), operations of the display section (3), and display configurations used in the above embodiment.

FIG. 4 is a diagram showing an example of the display format of the display section (3) in the above embodiment (at the time of presetting).
The E-TIME display indicates the playing time of each song at the time of presetting, where H represents hours, M represents minutes, and S represents seconds.

Next, the operation will be explained. First, step (S
In step 30), the R-DAT is placed in subcode information preset mode. In step (S31), the initial value of a counter (PNON) indicating the number of songs for which the song number and performance time of each song have been input is set. Then, in step (S32), the P button (not shown) in the operation button (1) shown in Table 1 is
Press the NO key (track number designation key) to display the track number you wish to record in the PNO section (not shown in the figure) of the display section (3) but shown in Table 2. Next, in step (S33) press the operation button (
1) PRE-TI not shown in the figure but shown in Table 1
Enter the performance time of the song with the corresponding song number using the ME key.

In step (S34), it is confirmed whether the performance time displayed in the PRE-TIME section (not shown) shown in Table 2 of the display section (3) is correct. If it is incorrect, step (S3
In step 3), enter the performance time again. If the playing time is correct, in step (S35), set the counter (PNON> to 1).
To increase. Step (S36) continues until the number of songs and performance time becomes equal to the maximum number of songs that can be input, or until the total number of songs arbitrarily determined by the user is reached (S3).
The operations from step 2) to step (S36) are repeated, and finally, when the number of songs becomes equal to the maximum number of songs or the total number of songs in step (S37), the input of the song number and the performance time corresponding to the song number is completed.

Next, the process of recording song numbers on the magnetic tape will be explained using FIG. First, in step (S200), R-D, A
In the step (S201) of setting the T to an operation mode (dubbing mode) in which the track number can be recorded in the playback mode, it is determined whether the track number is stored in the track number area of the memory (2a) in the microcomputer (2). If one song number to be played is stored, an integer value of 1 or more is stored in PNON.
If the song number is stored, in step (S202), a starting edge detection sensor (not shown) detects whether it is the starting edge of the magnetic tape.

If it is the beginning of the magnetic tape, the initial value of the counter (P N OC) is set in step (S203).

In step (S204), the first (P N OC th) song number stored in the song number area is recorded in the subcode area (16a, 16b) on the magnetic tape shown in FIG. In step (S205), it is determined whether there are any stored song numbers. That is, it is determined whether all preset song numbers have been recorded. If there are more track numbers to record, put the R-DAT into high-speed playback mode (the magnetic tape runs faster than normal playback speed). During this high-speed playback mode, the magnetic head records subcodes on the magnetic tape. Plays the elapsed time of the song from the area and stores it in memory. In step (S207), this elapsed time is
In order to determine the timing for recording the song number in advance, the microcomputer (2) compares whether or not the performance time is approaching the performance time stored in the performance time area of the memory (2a). In other words, it is determined whether the elapsed time is equal to the time obtained by subtracting the fixed time ta from the performance time.6 If they are equal, that is, if the timing to record the track number is approaching, in step (5208), the R-DAT is set to normal playback mode ( 4 Subcode areas (16a, 16b) on the magnetic tape running at normal playback speed
The elapsed time of the song is played back and stored in memory. In step (S209), the magnetic tape runs until the playing time and the elapsed time become equal.

In step (S210), it is detected whether the magnetic tape is at the end or not using an end detection sensor (not shown) or the like.

If it is not the end of the magnetic tape, the contents of the counter (PNOC) are incremented by 1 in step (S211).

Then, in step (S204), the second (P N OCth) song number stored in the song number area is recorded in the subcode area on the magnetic tape. Thereafter, the above steps (S204) to (S211>) are repeated, and in step (S205), when there are no more stored song numbers, the magnetic tape stops running, and the song number recording operation ends in step (S212). Note that step (S2
01), if no song number is stored, step (
The process ends in step S212). If it is determined in step (S202) that it is not the beginning of the magnetic tape, the magnetic tape is rewound.

In step (S207), if the elapsed time is not equal to the time obtained by subtracting the fixed time ta from the performance time, the magnetic tape runs at high speed until the elapsed time becomes equal. Step (S209
), if the playing time and elapsed time are not equal, the magnetic tape runs at normal speed until they are equal. Also, if the end of the magnetic tape is detected in step (Solo),
The magnetic tape stops running, and the recording operation of the track number ends.

The effect of the above embodiment is that the user does not need to listen to the monitor sound to record the track number, and the track number is automatically recorded6.
The song number will not be recorded incorrectly even if there is a low audio signal level area close to silence in the song.Music where six songs are repeated for a long time and there is no silence, such as recording at a concert venue. Even in such cases, the necessary song number can be recorded. Furthermore, it is possible to record the song number in a short time, and the song number can be recorded at the correct position on the magnetic tape without error.

In addition, in the above embodiment, the recording timing of the song number was determined by comparing the performance time of each song and the elapsed time, but this is the cumulative time from the first song and the cumulative performance time. The recording timing of the track number may be determined by comparing the elapsed time. If the subcode area of the magnetic tape records only the elapsed time for each song, the microcomputer can record the elapsed time for the first track. In order to calculate the cumulative elapsed time from the start of the song, it is necessary to perform an arithmetic operation that adds the elapsed time for each song. At this time, the playing time of the song stored in the memory in advance is the cumulative playing time from the first song. In this way, the same effects as in the above embodiment can be achieved.

In addition, in the above embodiment, when the R-DAT is in the high-speed playback mode, the R-DAT shifts to the normal playback mode when the elapsed time becomes equal to the time obtained by subtracting the fixed time ta from the performance time. When the playing time and elapsed time become equal in playback mode, the brakes are applied to the high-speed magnetic tape running, the magnetic tape that has been running too long is rewound until the playing time and elapsed time are equal, and then the track number is changed. There is also a method of recording, which produces the same effects as the above embodiment.

Furthermore, it goes without saying that the recorded content in the program area on the magnetic tape may be anything other than music, conversation, video, or signals of a certain level, and in order to identify programs (songs), it is possible to Of course, it does not have to be a song number; for example, it can be a symbol, a title, or anything that can be identified.

〔Effect of the invention〕

As described above, the present invention includes an input means into which program identification information for identifying a program, first program time information corresponding to this program identification information can be input, and the program identification information inputted by this input means. and a storage means capable of storing the first program time information; and a storage means capable of storing the first program time information by reproducing the magnetic tape at high speed and reproducing the second program time information already recorded on the magnetic tape with the magnetic head; and the second program time information, and when they match, the program identification information is recorded in a predetermined area of the magnetic tape by the magnetic head. To record program identification information, it is no longer necessary for a recording operator (user) to listen to a monitor sound, and the recording is automatically performed. Program identification information will not be recorded erroneously even if there is a low audio signal level part close to a silent part in the program, and music where the program is long and has no silent part, such as recording at a concert venue. Even in such cases, necessary program identification information can be recorded.

Furthermore, the program identification information can be recorded in a short time, and the program identification information can be recorded at the correct position on the magnetic tape without error.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIGS. 2 and 3 are flowcharts explaining the operation of FIG. 1, and FIG. 4 is a diagram showing the display format of the display unit in the above embodiment.
Fig. 5 is a configuration diagram showing a conventional rotary head type digital audio recorder (R-D AT), and Fig. 6 is a block diagram showing a conventional rotary head type digital audio recorder (R-D AT).
FIG. 7, which is a diagram showing a pattern of recording tracks on a magnetic tape used in DAT, is a flowchart explaining the operation of the prior art. In the figure, (1) is an operation button, (2) is a microcomputer, and (Za) is a memory. Note that the same reference numerals in each figure indicate the same or corresponding parts. Figure 3 Figure 4 Amendment to Procedures December A1, 1986

Claims (2)

[Claims] (1) Input means capable of inputting program identification information for identifying a program and first program time information corresponding to the program identification information; a storage means capable of storing program time information; when the second program time information reproduced by the magnetic head by high-speed reproduction of the magnetic tape and the first program time information are substantially matched, the program time information is stored; A control means for controlling the magnetic head to record identification information in a predetermined area of the magnetic tape.
CM magnetic recording and reproducing device. (2) The first program time information is the playback time representing the length of the program, the second program time information is the elapsed time that has been played together with the program by the magnetic head representing the progress of playback of the program, and the second program time information is the playback time of the program and 2. The PCM magnetic recording and reproducing apparatus according to claim 1, wherein the program identification information and the reproduction time are input in advance through input means before operation and are stored in storage means.