JP2705070B2 - Signal recording / reproducing device - Google Patents

Description

The present invention is recorded on a recording medium using a digital recording system such as a recording medium using an optical disk called a compact disk or a tape recorder of a digital recording system called a DAT. The present invention relates to a signal recording / reproducing apparatus for editing and recording an audio signal such as a music signal on another recording medium, for example, a magnetic tape called a C cassette, a recordable optical disk, a DAT, or the like. 2. Description of the Related Art In recent years, many signal recording / reproducing apparatuses have a driving means for a plurality of recording media and are capable of editing and recording a music signal or the like recorded on one recording medium on another recording medium. I have. Hereinafter, an example of the above-described conventional signal recording / reproducing apparatus will be described with reference to the drawings. FIG. 4 shows a block diagram of a conventional signal recording / reproducing apparatus. In FIG. 4, reference numeral 21 denotes a first recording medium of a digital recording system such as a compact disk, on which information signals such as music signals are recorded. Reference numeral 22 denotes a reproducing means for driving the first recording medium 21, reading and reproducing the recorded signal and outputting an analog reproduced signal. Reference numeral 23 denotes an operation switch for operating the operation of the reproduction means 22 by a first operation means. Reference numeral 24 denotes a second recording medium such as a C cassette magnetic tape. Numeral 25 denotes a recording circuit for amplifying or attenuating the analog reproduced signal from the reproducing means 22 by a required degree of amplification and performing signal processing so that the analog reproduced signal can be recorded on the second recording medium 24. Numeral 26 designates a recording level operating means which is constituted by a variable resistor or the like for determining the degree of amplification in the recording circuit 25, and which allows the user to adjust the recording signal level on the second recording medium 24 to the reproducing means 22. This is for adjusting the recording level in accordance with the magnitude of the analog reproduction signal from.
Numeral 27 denotes a recording drive means for driving the second recording medium 24 to perform a recording operation. Numeral 28 denotes an operation switch for operating the operation of the recording drive means 27 as a second operation means. Regarding the signal recording / reproducing apparatus configured as described above,
The operation will be described below. In such a conventional signal recording / reproducing apparatus, a first recording medium is used.
In order to record the music signal 21 on the second recording medium 24, the first operation means 23 is first operated to reproduce the first recording medium 21 by the reproduction means 22 to obtain an analog reproduction signal.
Further, a level meter or the like (not shown) is shaken with the signal obtained by passing the analog reproduction signal through the amplifier circuit of the recording circuit 25, and the peak value of the shake is monitored. It is necessary for the user to operate the recording level operation means 26 so that is not too small. This is an operation procedure called recording level setting. When the recording level setting is completed, the first operation means 23 is operated to stop the reproduction operation of the first recording medium 21. Next, the second operating means 28 is operated to activate the recording driving means 27 to put the second recording medium 24 in a recording state, and then the first operating means 23 is operated to reproduce the first recording medium 21 by the reproducing means 22. The music signal of the first recording medium 21 can be recorded on the second recording medium 24 as the reproduction state. Problems to be Solved by the Invention However, in the above configuration, the recording level setting requires many operations, and the first recording medium is reproduced for a long time to monitor the vibration of the level meter and the like. If the operation of the recording level operation means 26 is not appropriate, when the second recording medium 24 is reproduced after recording on the second recording medium 24, the reproduced signal is greatly distorted, or conversely, the reproduced signal is There has been a problem that the noise may be small and very large. If the first operation means 23 is not operated after the second operation means 28 is operated even after the recording level is set, the music signal of the first recording medium 1 is recorded in the second recording medium 24 without interruption. It is not possible to operate the first operation means 23 and the second operation means 28 again even at the time when the recording is completed. In view of the above problems, the present invention provides a signal recording / reproducing apparatus that automatically sets a recording level to an appropriate recording level and then automatically performs a recording operation of a music signal from a first recording medium to a second recording medium. To provide. Means for Solving the Problems In order to solve the above problems, a signal recording / reproducing apparatus according to the present invention comprises a reproducing means for reproducing a first recording medium of a digital recording type, and a reproducing means for reproducing the first recording medium. Recording level setting means for setting an amplification degree in accordance with a signal level reproduced by the means, and a second signal after amplifying or attenuating the reproduction signal from the reproduction means with an amplification degree in accordance with an output of the recording level setting means. A recording circuit for performing signal processing in a form capable of recording on a recording medium, a recording driving means for driving a second recording medium to perform a recording operation, and controlling operations of the reproducing means and the recording driving means, Control means for outputting a signal for controlling the recording level setting means, the control means,
When the first recording medium is reproduced by the reproducing means, all the desired songs to be recorded among the songs recorded on the first recording medium are reproduced for a predetermined time, and the reproduction time is usually several times to several tens times. High-speed sampling reproduction control is performed by repeating the operation of jumping the pit train corresponding to the reproduction time. According to the present invention having the above-described configuration, all of the songs desired to be recorded among the songs recorded on the first recording medium are reproduced for a predetermined period of time, and the normal reproduction time is several to several tens times the reproduction time. By repeating the operation of jumping the pit row, the reproduction means performs sampling reproduction of the first recording medium at a speed several times to several tens times that of the normal reproduction and at the same time reduces the signal level of the reproduction signal from the reproduction means. The recording level is monitored by the recording level setting means and automatically set to an appropriate level in the recording circuit in a short time, and then the first recording medium and the second recording medium are driven and automatically set to the second recording medium. It is possible to realize a signal recording / reproducing apparatus for recording a music signal from a first recording medium to a second recording medium at an appropriate recording level. EXAMPLES Hereinafter, a signal recording / reproducing apparatus according to an embodiment of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is a block diagram showing a signal recording / reproducing apparatus according to one embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a first recording medium of a digital recording system, such as a compact disk, on which information signals such as music signals are recorded. Numeral 12 denotes a reproducing means for driving the first recording medium 11, reproducing an information signal such as a music signal and outputting an analog reproduction signal, and 13 a C for recording the contents of the first recording medium 11.
A second recording medium 14 such as a cassette tape is a recording circuit for amplifying or attenuating the analog reproduction signal from the reproducing means 12 by a necessary amplification degree and performing signal processing so that the analog reproduction signal can be recorded on the second recording medium 13. . Reference numeral 15 denotes recording level setting means for changing and setting the magnitude of the amplification degree of the recording circuit 14 in accordance with the level of the analog reproduction signal of the first recording medium 11 from the reproduction means 12; AD conversion means 151 for digitally converting the signal level of the analog reproduction signal of the recording medium 11
A peak value latch means 152 for holding the peak value of the output digital signal of the AD conversion means 151; and an amplification degree which is set by changing the magnitude of the amplification degree of the recording circuit 14 according to the output value of the peak value latch means 152. It comprises a setting means 153. Reference numeral 16 denotes a recording drive unit for driving the second recording medium 13 to perform a recording operation, and 17 sends a control signal to the reproduction unit 12, the recording drive unit 16, and the recording level setting unit 15, and controls the operation of these units. This is control means constituted by a microcomputer or the like for controlling. 18 sends the opening / closing information to the control means 17, and if it is ON, the control means 17 controls the reproducing means 12 and the like to automatically set the recording level, and transmits the music signal and the like of the first recording medium 11 to the second means. This is an automatic recording start switch for shifting to a series of operation processing of recording on the recording medium 13 of FIG. Regarding the signal recording / reproducing apparatus configured as described above,
The operation will be described below with reference to FIGS. FIG. 2 is a specific circuit diagram of the recording level setting means. 52 to 55 are comparators, 56 to 60 are resistors, 61 is a constant voltage source, and these constitute the AD conversion means 151. 62
~ 65 are flip-flop circuits of general-purpose logic IC,
These constitute the peak value latch means 152. 70-7
Reference numeral 3 denotes a resistor, and reference numerals 74 to 77 denote analog switch elements, which constitute the amplification degree setting means 153. Reference numerals 80 to 82 denote resistors, and reference numeral 83 denotes an amplification circuit. These are portions of the variable amplification amplifier which constitutes a part of the recording circuit 14. FIG. 3 is a flowchart showing the main processing operation of the microcomputer of the control means 17. In step 30, it is determined whether or not the automatic recording start switch is ON. If the switch is OFF, the process returns to step 30 again. If the switch is ON, the process proceeds to step 31, and the reset signal B is temporarily changed from "L" level to "H" level. After a lapse of a certain time, the flip-flop circuits 62 to 63 are reset to “L” level again. As a result, the peak value latch means 152 is reset, and the peak value of the output of the AD conversion means 151 can be latched. Next, in step 32, the reproducing means 12 is controlled to control all the songs desired to be recorded among the songs recorded on the compact disk (hereinafter abbreviated as CD) as the first recording medium 11 from the time of normal reproduction. Also performs sampling playback at high speed, and controls the playback means 12 when playback of only the song desired to be recorded is completed.
Stop playing the CD. The analog reproduction signal from the reproduction means 12 at the time of the high-speed sampling reproduction of the CD is input to the non-inverting inputs to the comparators 52 to 55 in the AD conversion means 151 of the recording level setting means 15. The inverting inputs of the comparators 52 to 55 output the voltage of the constant voltage source 61.
The voltage divided by the resistance of 56-60 is input, and the comparators 52-55 output "H" when the voltage of the non-inverting input becomes higher than the voltage input to the inverting input of each of them. An operation of outputting a level, otherwise outputting an “L” level. Therefore, when the analog reproduction signal A is at a very low level, the comparators 52-55
Are at "L" level, and as the analog reproduction signal A gradually increases, only the output of the comparator 52 becomes "H" level → the outputs of the comparators 52 to 53 become "H" level →
Output of comparators 52-54 is "H" level → Comparator
The outputs of 52 to 55 all change to "H" level, which indicates that the AD conversion operation is being performed. The outputs of the comparators 52 to 53 are supplied to a flip-flop circuit (hereinafter abbreviated as FF) 6 of the peak value latch means 152.
If the SET input of these FFs 62 to 65 attains the “H” level even once, the “H” level is output to the Q terminal of the FF, and the SET input is subsequently changed to the “L” level. The Q terminal keeps the “H” level even when the level goes high. Also, FF62 ~
Until the 65 SET input becomes “H”, the Q terminal of that FF is “L”.
Since it remains, it is understood that the FFs 62 to 65 perform the operation of holding (latch) the peak value of the output digital signal of the AD conversion means 151. Further, the Q terminals of the FFs 62 to 65 are connected to control inputs of analog SW elements (hereinafter abbreviated as ASW) 74 to 77 of the amplification degree setting means 153. In the ASWs 74 to 77, a parallel resistor 70 is connected to a feedback resistor 81 of an amplifier 83 of the recording circuit 14.
It works to turn ON / OFF ~ 73, and these resistors 70 ~ 7
3. One variable amplification amplifier (hereinafter abbreviated as PGA) is formed by the resistors 80 to 82, the ASWs 74 to 77, and the amplifier circuit 83. Now, paying attention to the above-mentioned amplification degree of the PGA, when the analog reproduction signal is very small, all the outputs of the comparators 52 to 5 are at "L" level, so that all the Q terminals of FF62 to 65 are also at "L" level. and a, therefore, ASW74～77 all become open, the amplification degree of the PGA is ₀ times -R ₁ / R. Next, when the reproduced analog signal A becomes slightly large and only the output of the comparator 52 becomes “H” level, the ASW77
Becomes ON and the amplification degree of the PGA becomes-(R ₁ R ₂ ) / R ₀ times. As described above, as the reproduced analog signal A gradually increases, the amplification degree of the PGA becomes −R ₁ / R ₀ → − (R ₁ R ₂ ) / R ₀ →
− (R ₁ R ₂ R ₃ ) / R ₀ → − (R ₁ R ₂ R ₃ R ₄ ) / R ₀ → −
_{(R 1 R 2 R 3 R} 4 R 5) / R 0 and slide into change. Thus, as the reproduced analog signal A increases, the amplification degree of the PGA gradually decreases.
Depending on how to choose the value of ~ 60 and the value of the resistor 70 ~ 73,80 ~ 82,
For example, Ra: Rb: Rc: Re = 1: 1: 2: 4, R 1: R 2: R 3: R 4: R 5 = 8: 8:
Assuming 4: 2: 1, the analog playback signal is
The gain of the PGA can be reduced by about 6 dB each time it increases by about 6 dB near the level where 5 operates.
When the values of the resistors 56 to 60, 70 to 73, and 80 to 82 are set in this way, the peak value of the analog reproduction signal A is
In the level near the point where .about.55 operates, the peak value of the analog signal at the output terminal of the amplifying circuit 83 is suppressed to a change of about 6 dB or less even if the peak value of the analog reproduced signal A is largely different. Accordingly, the number of comparators of the AD conversion means 151 is increased to increase the accuracy of AD conversion, and accordingly, the number of FFs of the peak value latch means is increased, and the number of resistances and ASWs of the amplification degree setting means 153 is increased. Then, even if the peak value of the analog reproduction signal A greatly changes, the peak value of the output signal of the amplifier 83 of the recording circuit 14 can hardly change. From this, the output terminal C of the amplifier 83 of the recording circuit 14
The maximum recording level that can be input to the point C within a range that does not cause distortion when the circuit is cut off before the point and recording is performed on the second recording medium 13 is a level substantially equal to the peak value of the output signal of the amplifier 83 of the recording circuit 14. If so, the signal level recorded on the second recording medium can be an appropriate recording signal level that makes the most of the dynamic range of the second recording medium. As described above, by inputting the analog reproduction signal A from the reproduction means 12 to the recording level setting means, the recording level in the recording circuit 14 is automatically adjusted so that the recording level becomes appropriate for recording on the second recording medium 13. Is set to an appropriate level. In the high-speed sampling reproduction of the CD as the first recording medium 11, the pits are traced for a certain length of time without being traced for all the spiral rows of pits engraved on the CD, and reproduced. Next, the microcomputer controls the reproducing means 12 by jumping several to several tens of rows of pits and then tracing and reproducing the pits for a certain length of time again. Can be performed. The high-speed sampling reproduction of such a digital recording type recording medium is different from the high-speed reproduction of an analog recording type magnetic tape, and the reproduction signal level is the same as the reproduction signal level during normal reproduction. However, in high-speed sampling playback, finding the true peak value of the entire CD is a difficult technique, but unless the sampling playback time is extremely short, it is close to the true peak value so that there is no practical problem. The peak value can be detected. If high-speed sampling playback is used, CDs that require tens of minutes for normal playback can be played back in just a few minutes, so the above recording level setting can be set much faster than with normal playback. Can be completed. When the reproduction of the music desired to be recorded on the CD in step 32 is completed, the recording level setting of the recording circuit 14 for recording on the second recording medium 13 is appropriate.
Then, the recording drive unit 16 is controlled by the control unit 17 to start the recording run of the second recording medium 13. Thereafter, in step 34, the reproduction means 12 is controlled by the control means 17 to start reproduction of the CD, which is the first recording medium 11, and the reproduction of the CD is stopped after normal reproduction of only the music desired to be recorded. In order to reproduce only the desired music to be recorded on the CD, only the music number of the desired music to be recorded is stored in the memory element of the microcomputer of the control means 17 by an operation switch means (not shown) to the control means 17 and is stored in the microcomputer. This can be done by reproducing while reading sequentially. Here, the reproduction of only the desired song is taken as an example, but it is of course possible to play all the songs on the CD in order without storing the desired song in the memory element of the microcomputer. is there. This is the same in the case of the high-speed sampling reproduction. By the way, after step 34, in step 35, the control means 17
The recording driving means 16 is further controlled to stop the recording traveling of the second recording medium 13. As a result, the operation of automatically setting the recording level and automatically recording the information signal such as the music signal of the first recording medium 11 on the second recording medium 13 is completed. As described above, according to the present embodiment, the reproduction means performs the sampling reproduction of the first recording medium at a high speed of several times to several tens times that of the normal reproduction, and also adjusts the signal level of the analog reproduction signal from the reproduction means. The recording level is monitored by the recording level setting means, and the amplification level at which an appropriate recording level is automatically set is set in the recording circuit in a short time. Thereafter, the first recording medium and the second recording medium are driven and automatically set. A signal recording / reproducing apparatus for recording a music signal from a first recording medium to a second recording medium at an appropriate recording level can be provided. Although a compact disk is used as the first recording medium in this embodiment, a ground type optical disk or a magnetic tape for a digital recording type tape recorder called DAT may be used. Further, in this embodiment, an analog reproduction signal is used as an output of the reproduction means, but a digital reproduction signal may be used. In that case, the AD conversion means in the recording level setting means becomes unnecessary, but a digital signal processing circuit for matching the format is required before the peak value latch means depending on the signal format of the digital reproduction signal. In some cases, the variable gain amplifier using the gain setting means and the recording circuit may be constituted by a digital filter. In the present embodiment, the peak value latch means is configured using a flip-flop circuit of a general-purpose logic IC, but the output signal of the AD conversion means is monitored by a microcomputer or the like,
Depending on the magnitude of the peak value, a method may be used in which the amplification degree of the variable amplification amplifier by the recording circuit and the amplification degree setting means constituted by a digital filter or the like is set by a microcomputer or the like. Effect of the Invention As described above, the present invention sets a reproducing unit for reproducing a digital recording type first recording medium and an amplification degree according to a signal level of reproducing the first recording medium by the reproducing unit. A recording level setting means, and a recording circuit for amplifying or attenuating a reproduction signal from the reproduction means with an amplification degree corresponding to an output of the recording level setting means, and then performing signal processing so as to be able to record on a second recording medium. Recording drive means for driving a second recording medium to perform a recording operation; control means for controlling the operation of the reproducing means and the recording drive means and outputting a signal for controlling the recording level setting means; Wherein the control means, when reproducing the first recording medium by the reproducing means, reproduces all the desired recording songs among the songs recorded on the first recording medium for a predetermined period of time and at the same time, Several times to several tens High-speed sampling playback control is performed by repeating the operation of jumping the pit train corresponding to twice the normal playback time, so that all the desired songs to be recorded on the first recording medium are several times to several tens times the normal playback time High-speed sampling and playback, and the signal level of the playback signal from the playback means is monitored by the recording level setting means to automatically set the amplification level to the appropriate recording level in the recording circuit in a short time. Thereafter, the first recording medium and the second recording medium are driven, so that the music signal can be automatically recorded from the first recording medium to the second recording medium at an appropriate recording level. Further, the above-described sampling reproduction is performed by repeating the operation of performing the predetermined time and jumping the pit train corresponding to the normal reproduction time several times to several tens times of the reproduction time, thereby performing the Since the peak value of the reproduction signal level can be found over the entire section, an excellent effect that a value almost close to the true peak value in the music can be found is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an overall configuration of an embodiment of a signal recording / reproducing apparatus of the present invention, and FIG. 2 shows a specific configuration of a recording level setting means of the embodiment of the present invention. FIG. 3 is a circuit diagram, FIG. 3 is a flowchart showing a main part of the processing operation of the microcomputer used in the control means of the embodiment of the present invention, and FIG. 4 is a block diagram showing the entire configuration of a conventional signal recording / reproducing apparatus. 12 playback means, 14 recording circuit, 15 recording level setting means, 16 recording drive means, 17 control means.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Michio Kawai               Matsushita, 1006 Kadoma, Kazuma, Osaka               Kiki Sangyo Co., Ltd. (72) Inventor Yoshinori Tawa               Matsushita, 1006 Kadoma, Kazuma, Osaka               Kiki Sangyo Co., Ltd. (72) Inventor Noriyuki Sakamoto               Matsushita, 1006 Kadoma, Kazuma, Osaka               Kiki Sangyo Co., Ltd.                (56) References JP-A-63-37866 (JP, A)                 Shokai Sho 61-48431 (JP, U)

Claims (1)

(57) [Claims] Reproducing means for reproducing a digital recording type first recording medium; recording level setting means for setting an amplification degree according to a signal level of the first recording medium reproduced by the reproducing means; and recording level setting means A recording circuit for amplifying or attenuating the reproduction signal from the reproducing means with an amplification degree corresponding to the output of the recording means, and performing signal processing so that the signal can be recorded on the second recording medium; and driving the second recording medium for recording. Recording drive means for performing an operation, control means for controlling the operation of the reproduction means and the recording drive means and outputting a signal for controlling the recording level setting means, the control means is a reproduction means When playing back the first recording medium, all of the songs desired to be recorded among the songs recorded on the first recording medium are played back for a predetermined time, and the normal playback time is several to several tens times the playback time. Equivalent pit A signal recording / reproducing apparatus characterized in that high-speed sampling / reproducing control is performed by repeating an operation of jumping a column.