JP2556723Y2 - Disk recording system - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a disk recording system, especially a CD or
The present invention relates to a disk recording system for recording an audio reproduction signal reproduced from a disk such as an LD on a tape.

[Conventional technology]

In a CD, generally, the peak level of a recorded signal is high in a rock or symphony, and low in a popular or stringed music.

Also, even for the same tune, the peak level of the recording signal is generally different depending on the software manufacturer of the CD.

Therefore, when recording from a CD to a tape, it is necessary to adjust the peak level to an appropriate level that does not cause recording distortion.

In order to automatically adjust the peak level, a computer-controlled CD recording system (CCRS), which systematizes a CD player and a tape deck, has been developed.

In this system, the peak level of a CD recording signal is searched, and the recording level is automatically adjusted to an optimum level to perform and record.

Specifically, the CCRS installed on the CCRS system deck
When the RS key is turned on, the microcomputer of the system deck fixes the recording level adjustment volume at the maximum position, controls the tape recording unit provided on the output side of the recording level adjustment volume to REC PAUSE state, and then searches for peaks As a CCRS command signal to the microcomputer of the CCRS system CD player.

The microcomputer of the system CD / player controls the CD reproducing unit based on the CCRS command signal, and performs a predetermined playing time portion at a predetermined track number of the CD (1 minute to 15 minutes before the end of the performance of each track from track number 1 to track number 3). Seconds and 15 seconds before the end of the last song number), to search for the peak level.

At this time, the analog reproduction signal output from the CD reproduction unit is input to an output level adjustment unit having a variable gain (attenuation).

The output level adjustment unit is set to a maximum gain (minimum attenuation) state in advance, and when an analog reproduction signal is input,
The level of the reproduction signal output from the output level adjustment unit is compared with a predetermined reference level, and the gain for the reproduction signal is reduced every time the level exceeds the reference level. The gain is automatically changed so that it does not exceed a certain level, the output peak level to the system deck side is automatically set according to the peak level of the CD recording signal, and the recording level adjustment volume is set to the maximum level Adjusted so that the recording level is optimal for the system deck.

When the search of the peak level is completed, the microcomputer of the system CD player sends a peak search end code to the microcomputer of the system deck.

When the microcomputer of the system deck inputs the peak search end code, the microcomputer performs release control of the REC PAUSE state, starts recording, and sends a PLAY command signal to the microcomputer of the system CD player.

Upon input of the PLAY command signal, the microcomputer of the system CD player performs PLAY control on the CD reproducing unit to start reproducing the CD.

The CD playback signal is adjusted to the optimum peak level for the system deck where the recording level adjustment volume is set to the maximum level by the output level adjustment section of the system CD player and output to the system deck side. The sound is recorded with the optimal level.

When the performance of the CD is completed, the microcomputer of the system CD player stops the reproduction of the CD and sends a STOP command signal to the microcomputer of the system deck.

The microcomputer of the system deck receives the STOP command signal, performs STOP control on the tape recording unit, and stops recording.

In this way, according to CCRS, the search for the peak level of the CD and the automatic adjustment of the recording level for the peak level, and the CD performance and synchronous recording are all performed automatically with only one operation of the CCRS key, The labor required for CD recording is significantly reduced, and dubbing without distortion can be performed.

[Problems to be solved by the invention]

However, in such a conventional CD recording system, an output level adjustment unit provided on the output side of the CD playback unit compares the level of the playback signal output from the output level adjustment unit in the analog domain with a predetermined reference level. Since the gain is reduced every time the reference level is exceeded, there is a possibility that an accurate level adjustment operation cannot be performed if noise is added to the analog reproduction signal.

Also, since the playback target tunes for the peak search are fixed to the song numbers 1, 2, and 3 and the final song, when recording only songs other than the song numbers 1, 2, and 3 and the final song as in a program performance, the recording target Since it is not possible to adjust the recording level to an optimum level for the song, there is a possibility that the recording level may be too high, resulting in distortion of the sound.

The present invention has been made in view of the above-described problems of the related art, and has as its object to provide a disk recording system capable of accurately adjusting a recording level automatically with respect to a peak level of a disk recording signal.

It is another object of the present invention to provide a disk recording system capable of accurately and automatically adjusting the recording level of a music piece to be recorded even when only a specific music piece selected as a program piece within a desired editing time is recorded.

It is another object of the present invention to provide a disk recording system in which a user can select a peak search with high accuracy and a peak search with a short required time.

[Means for solving the problem]

The disk recording system according to the present invention includes a level detecting means for detecting a reproduction signal level in a digital domain, a disk reproducing means for reproducing an audio signal recorded on a disk, and a recording apparatus for recording a reproduction signal reproduced by the disk reproducing means. In a disk recording system having a tape recording means for inputting via a level adjusting means and recording on a tape, an editing time input operating means for inputting an editing time, and an editing operation for each music piece recorded on the disk An editing means for selectively editing and registering a program tune which falls within the editing time input by the time input operation means, and a disc reproducing means based on a peak search command, and among the tunes recorded on the disc, the editing means A peak search replay that performs playback for a peak search over a specified playing time range for all registered program songs Control means, and maximum peak level detection means for detecting the maximum peak level of the reproduction signal level detected by the level detection means of the disc reproduction means during peak search reproduction by the peak search reproduction control of the peak search reproduction control means. Recording level adjustment control means for controlling the recording level adjustment means based on the maximum peak level of the reproduction signal detected by the maximum peak level detection means, and adjusting the recording level adjustment means so as to provide an optimum recording level for the maximum peak level of the reproduction signal. It is characterized by having.

Another disc recording system of the present invention is provided with desired music selection operation means for selecting a desired music, and the editing means selects and edits a program music by giving priority to the desired music selected by the desired music selection operation means. , And is characterized by the following.

Further, still another disk recording system of the present invention is provided with a peak search playback speed designation operation means for performing an operation of designating the peak search playback speed to either low speed or high speed,
The playback control means for peak search, when low speed is designated by the playback speed designation operation means for peak search, performs double speed playback for peak search, when high speed is designated,
It is characterized in that double-speed and fast-forward reproduction is performed for peak search.

〔Example〕

One embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a block diagram showing a configuration of a CD recording system according to the present invention.

The CD recording system includes a system CD player 10 and a system deck 20.

Still, the system CD player includes a CD reproducing unit 12 for reproducing a recording signal from a CD and a system microcomputer (hereinafter simply referred to as a “system microcomputer”) for controlling the CD reproducing unit 12.
That. ) 14 and an operation unit 16.

The CD playback unit 12 includes an optical pickup, a spindle motor,
It includes various servo circuits, digital signal processing circuits, D / A converters, etc., and functions as a disk reproducing means.

The CD playback unit 12 performs playback operations such as normal playback, double-speed playback, double-speed and fast-forward playback under the control of the system microcomputer 14, converts a PCM signal read from a CD into an analog playback signal, and outputs the analog signal. In accordance with the subcode reading request from the microcomputer 14, the subcode data and the reproduction signal level data are output to the system microcomputer 14, and a search and other operations are performed.

The digital signal processing circuit not only decodes digital audio data and subcodes, but also has a function as a reproduced signal level detecting means for detecting a reproduced signal level in a digital domain.

The output side of the analog playback signal of the CD playback unit 12 is connected to a line-out terminal _LOUT .

The operation unit 16 includes a PLAY key, a STOP key, a PGM
A key, an EDIT key, a TRACK key, a numeric keypad, and the like are provided, and a key-on signal according to a user's key-on operation is output to the system microcomputer 14.

The operation unit 16 also has a function as a desired music selection operation means for a user to select a program music from among the music pieces recorded on the disc and an editing time input operation means for inputting an editing time. I have.

The system microcomputer 14 has a bus-connected CPU, ROM, RA
M, based on a predetermined program stored in ROM, switch the mode of the track mode, program mode, edit mode according to the operation of the TRACK key, PRG key, EDIT key, and under the track mode In addition to performing normal playback control and stop control for the CD playback unit 12 in response to the operation of the PLAY key and STOP key of the operation unit 16 of the operation unit, registering the program music in response to the operation of the numeric keypad in the program mode, and in the edit mode Selects, edits, and registers a program song that is within the editing time according to the input operation with the numeric keypad in the program. Program for the CD playback unit 12 according to the operation of the PLAY key or the STOP key in the program mode or edit mode. Performs performance control.

The system microcomputer 14 registers a desired song registration means for registering the song selected by the operation unit 16 as a program song, and selects a program song within the editing time inputted by the operation unit 16 from each song recorded on the disc. It has a function as an editing means for editing and registering, and the operation unit 16 and the system microcomputer 14 constitute a program music selecting means.

When an N.CCRS command signal (or H.CCRS command signal) is input from the system deck 20, the system microcomputer 14 performs double-speed (or double-speed and fast-forward) playback control for the peak search for the CD playback unit 12 and During peak search and playback, the playback signal level data is input from the digital signal processing circuit of the CD playback unit 12 to detect the maximum peak level,
When the playback for peak search is completed, the maximum peak level data together with the peak search end code are stored in the system deck 20.
It has a function to send to the side.

When the PLAY command signal is input from the system deck 20 after the transmission of the maximum peak level data, the reproduction control of all the music pieces of the CD is performed in the track mode, and the reproduction control of the program music is performed in the program mode.

In this embodiment, the playback control for peak search is performed for all the songs on the CD in the track mode and for one minute before the end of the performance of each song. In the program mode and the edit mode, all the program songs on the CD (maximum) All songs on the CD) are performed for the entire playing time of each song.

The system microcomputer 14 is connected to the control signal input / output terminal C _{I / O} , and receives an N.CCRS command or an H.CC
Input RS command signal, PLAY command or STOP command signal, send peak search end code to system deck 20 along with maximum peak level data, REC command or STO
Sends P command signal.

The system microcomputer 14 includes a playback control means for peak search,
It has a function as a maximum peak level detection means and a reproduction control means.

On the other hand, in the system deck 20, a line input terminal L _IN and a control signal input / output terminal C _{I / O} ′ are provided, and a line output terminal L _OUT and a control signal input / output terminal C _I Connected to _{/ O.}

Tape recording unit 24 as a tape recording means through the electronic volume 22 as recording level adjustment means is connected to the line input terminal L _IN.

This tape recording unit 24 includes a recording amplifier, recording head,
It includes a tape running mechanism, etc.
Recording on tape by recording control by.

A system microcomputer 26 is connected to the electronic volume 22. This electronic volume 22 is
The recording level adjustment operation is performed by the recording level adjustment control by.

An operation unit 28 is connected to the system microcomputer 26.
The operation unit 28 includes a REC key, STOP key, recording level up key, recording level down key, etc.
An RS key 30 and an H.CCRS key 32 are provided, and a key-on signal corresponding to a key-on operation by a user is output to the system microcomputer 26.

The N.CCRS (normal computer control CD recording system) key 30 is an operation key for automatically adjusting the recording level by searching for a low-speed peak and for starting automatic CD playback and synchronous recording. A system) key 32 is an operation key for starting automatic recording level adjustment by high-speed peak search, automatic CD playing, and synchronous recording.

The N.CCRS key 30 and the H.CCRS key 32 have a function as a peak search speed designation operation means.

In this embodiment, the low-speed peak search is a peak search by double-speed reproduction, and the high-speed peak search is a peak search by double-speed and fast-forward reproduction.

The system microcomputer 26 has a CPU, ROM, RA
M, based on a predetermined program stored in the ROM, the normal recording control and stop control for the tape recording unit 24 according to the operation of the REC key and STOP key of the operation unit 28, a recording level up key, Performs normal recording level adjustment control for the electronic volume 22 in response to operation of the recording level down key, and performs automatic recording level adjustment control and synchronous recording control in response to the ON operation of the N.CCRS key 30 or H.CCRS key 32. Do.

Specifically, when the N.CCRS key 30 or the H.CCRS key 32 is turned on, the N.CCRS command signal as a low-speed peak search command or the H.CCRS command as a high-speed peak search command is sent to the system CD player 10. It outputs a signal and performs REC PAUSE control on the tape recording unit 24, and the system CD player 1
When the peak search end code is entered from 0, the electronic volume 22 is determined based on the maximum peak level data entered together.
After performing the level adjustment control for the maximum recording level and adjusting the recording level to the optimum recording level for the maximum peak level, the PLAY command signal is output to the system CD player 10 and the REC command signal is input from the system CD player 10 to the tape recording unit 24 where the REC command is received. PAUSE release control is performed and recording synchronized with the performance of the CD is performed.

The system microcomputer 26 has functions as recording level adjustment control means and recording control means.

Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS.

2 to 4 show the operation of the system microcomputer 14 of the system CD player 10, and FIG. 5 shows the operation of the system microcomputer 26 of the system deck 20.

When the power switch is turned on, the system microcomputer 14 of the system CD player 10 first waits for a CD to be inserted (step 50 in FIG. 2). Performs control and reads TOC information via the digital signal processing circuit (steps 52 and 5).
Four).

On the other hand, when the power switch is turned on, the system deck 20 first waits for a cassette to be inserted (step 300 in FIG. 5), and proceeds to step 310 when a cassette is inserted.

When the PLAY key is turned on by the user in the track mode on the system CD player 10 side, the system microcomputer 14 performs normal PLAY control on the CD reproducing unit 12 to reproduce all the music from the first music to the last music (step). 58-6
2).

Also, REC is started at the same time as CD playback starts on the system deck 20.
When the key is turned on, the system microcomputer 26 controls the recording of the tape recording unit 24 and starts the recording operation.
The reproduction signal from the CD is recorded on the tape (steps 302 and 304 in FIG. 5).

At this time, when the recording level up key or the recording level down key is turned on, the system microcomputer 26 performs the recording level adjustment control for the electronic volume 22 to raise or lower the recording level (step 33 in FIG. 5).
8, 340 or 342, 344), the recording level can be adjusted manually by looking at a level meter (not shown).

When the STOP key of the system CD player 10 is turned on or when all the songs on the CD have been played, the system microcomputer 14
To stop the reproduction of the CD (steps 64 and 66 in FIG. 2).

Also, when the STOP key of the system deck 20 is turned on or the end of the tape is reached, the system microcomputer 26 starts the tape recording unit 24.
STOP control to stop tape recording (No. 5
Steps 306 and 308 in the figure).

On the other hand, when the user wants to reproduce only a desired specific song, the user turns on the PGM key and sets the program mode (steps 68 and 70). For example, if song numbers 2 and 4 are the desired songs, ten keys 2 and ten keys Turn on 4.

When the numeric keypad 2 is turned on, the system microcomputer 14 determines that there is a music selection operation, and registers the music number 2 as a program music (steps 72 and 74). Similarly, when the numeric keypad 4 is turned on, the system microcomputer 14 The song number 4 is additionally registered as a program song (steps 76, 72, 74).

When the PLAY key is turned on in the program mode in this state, the system microcomputer 14 controls the program playing of the CD reproducing unit 12 and, among the songs recorded on the CD, the song number registered as the program song Steps 2 and 4 are reproduced sequentially (steps 58, 60 and 78).

RE of system deck 20 at the same time as the start of program performance
When the C key is turned on, recording on the tape is started (steps 302 and 304 in FIG. 5).

When the performance of the program No. 4 is completed, the reproduction of the CD is stopped (steps 80 and 82 in FIG. 2). At this time, if the STOP key of the system deck 20 is turned on, the tape recording is also stopped (No. Steps 306 and 308 in FIG. 5).

When the reproduction of the CD is stopped, the system CD player 10 remains in the program mode. Therefore, by turning on the PLAY key again, the program Nos. 2 and 4 can be replayed (steps 58, 60 in FIG. 2). 78).

The selection of the program tune may be one tune or all tunes on the CD.

To return from the program mode to the track mode, turn on the TRACK key to enter the track mode.
Steps 84 and 56 in the drawing) At this time, the registration of the program music is deleted.

In addition, songs that fit within the tape length, including songs numbered 2 and 4,
If you want to select and edit a song from each song on the CD to register a program song, select song numbers 2 and 4 in the program mode and then turn on the EDIT key in the program mode.

Then, the system microcomputer 14 proceeds to step 86 in FIG.
Judge YES and set the edit mode (step 8
8).

Subsequently, when the tape length currently set in the system deck 20 is 45 minutes, the input operation of the editing time of 45 minutes is performed using the ten keys.

Then, the system microcomputer 14 determines YES in step 90, and refers to the TOC information read from the CD first, and
If the total of the total playing time of the songs No. and No. 4 and the predetermined inter-song time are much shorter than the editing time, these program numbers are registered as the program music and all the program music other than the music Nos. A song in which the total of the total playing time and the predetermined inter-song time falls within the editing time is selected and edited, and additionally registered as a new program song (step 92).

As a result of such automatic editing processing, for example, song number 2,
Assuming that 4, 1, 3, and 6 have been selected as songs that fit within the editing time, when the user turns on the PLAY key of the system CD player 10, the system microcomputer 14
S, the search control and the PLAY control are repeated for the CD reproducing unit 12, and the track number 2 and the
Reproduction is performed in the order of 4, 1, 3, and 6 (step 96).

If the REC key is turned on at the same time that CD playback starts with the system deck 20 in the tape rewind state, the system C
Recorded on tape in the order of playback by the D player 10 (fifth
In steps 302 and 304 in the figure, an automatic editing dubbing tape can be created.

When the performance of the last program tune No. 6 is completed, the system microcomputer 14 determines YES in step 98 of FIG. 2, and stops the reproduction of the CD (step 100). When the tape end is reached, the system microcomputer 26 determines YES in step 306 of FIG. 5, and stops recording (step 306).
308).

At this time, since the system CD player 10 remains in the edit mode, the program tune previously edited can be reproduced by turning on the PLAY key again (steps 94 and 96 in FIG. 2).

When the EDIT key is turned on in the track mode, there is no program music so far, and the system microcomputer 14 selects and edits the music within the editing time from the music number 1, for example, the music numbers 1, 2 , 3, 4 and 6 are programmed in this order.

To release the edit mode, the track mode is set by turning on the TRACK key (steps 102 and 56 in FIG. 2).

On the other hand, if you want to play and synchronize recordings with all songs on the CD automatically adjusted to the optimal recording level,
The player 10 side is in the track mode, and the system deck 20 side is in the tape rewinding state.
Turn on key 30.

Then, a key-on signal related to the N.CCRS key 30 is input from the operation unit 28 to the system microcomputer 26 as a recording level automatic adjustment performance and synchronous recording command.

When a key-on signal related to the N.CCRS key 30 is input, the system microcomputer 26 receives an N.CCRS as a low-speed peak search command.
Sends command signals to the system microcomputer 14 of the system CD player 10
(Steps 310 and 312 in FIG. 5), and the tape recording unit
24 is subjected to REC PAUSE control to bring it into a REC PAUSE state (step 314). ).

Then, it waits for the input of the peak level search end code from the system microcomputer 14 (step 316).

When the N.CCRS command signal is input in the track mode, the system microcomputer 14 of the system CD player 10 determines YES in step 104 of FIG. 2 and proceeds to the flow of FIG. 3 to first set the maximum level data PLD to 0. (Step 150) After confirming that the current mode is the track mode and that the command is a low speed (normal) peak search command (Steps 152 and 15).
4) Perform search and double-speed playback control on the CD playback unit 12 to start double-speed playback for peak search for all songs on the CD from one minute before the end of performance of each song to the end of performance. (Step 156).

Then, during the double-speed playback, a process of inputting the playback signal level data from the digital signal processing circuit of the CD playback unit 12 to make an LD (step 158), and if the LD exceeds the PLD, the LD
The process of rewriting D is repeated until the double-speed reproduction of the last song of the CD is completed (repetition of steps 160 to 164 and 158 to 164).

The input of the reproduction signal level data from the digital signal processing circuit is performed every time the reproduction progresses for one frame time of the A-time of the subcode.

When the double speed reproduction of all the songs on the CD is completed, the STOP control is performed on the CD reproducing unit 12 to stop it (steps 164 and 166).
At this time, since the peak level of each song on the CD statistically has a high probability of existing one minute before the end of the performance, the PLD is the maximum peak level data of all the songs on the CD.

After stopping the reproduction of the CD, the system microcomputer 14 sends the peak search end code and the maximum peak level data PLD to the system microcomputer 26 of the system deck 20 (step 168).

Then, it waits for a PLAY command signal to be input from the system deck 20 (step 170).

The system microcomputer 26 of the system deck 20 that has input the peak search end code performs adjustment control on the electronic volume 22 based on the maximum peak level data input together, and adjusts to the optimum recording level for the maximum peak level data (fifth. Steps 316, 318 in the figure).

Specifically, when the maximum peak level data is at a predetermined reference level, the volume position of the electronic volume 22 is set to a predetermined reference position, and when the maximum peak level data is larger than the predetermined reference level, the electronic volume 22 The volume position is set to a position where the amount of attenuation is larger than the predetermined reference position. Conversely, when the maximum peak level data is smaller than the predetermined reference level, the electronic volume 22 is reduced accordingly.
Is a position where the amount of attenuation is smaller than a predetermined reference position.

As a result, recording can be performed at an optimum level with respect to the maximum peak level of the CD recording signal, and distortion of the tape recording signal can be prevented.

Next, the system microcomputer 26 reads the system CD player 10
A PLAY command signal is output to the system microcomputer 14 (step 320).

The system microcomputer 14 that has input the PLAY command signal
YES is determined in step 170 in the figure, and the system deck 20 side is reached.
At the same time as sending out the REC command signal, normal PLAY control is performed on the CD reproducing section 12 to start reproducing all the music pieces from the music piece number 1 to the last music piece in order (steps 172, 174).

The playback signal played back by the CD playback unit 12 is
Output to the 20 side.

On the other hand, the system microcomputer 26 of the system deck 20 to which the REC command signal has been input sends the REC PAUSE
Release control is performed to start the recording operation on the tape (step 324 in FIG. 5).

Thereby, the performance of the CD and the synchronous recording are automatically started.

If the performance of all the songs on the CD ends first before the tape end is reached, the system microcomputer 14 of the system CD player 10 sends a STOP command signal to the system deck 20 and then performs STOP control on the CD playback unit 12 to control the CD. Is stopped (steps 176, 178, 180 in FIG. 3).

The system microcomputer 26 that has received the STOP command signal performs STOP control on the tape recording unit 24 to stop recording (steps 326 and 328 in FIG. 5).

Conversely, if the end of the tape is reached before the end of playing all the songs on the CD, the system microcomputer 26 of the system deck 20 sends a STOP command signal to the system CD player 10 side, and then performs STOP control on the tape recording unit 24. Then, the recording is stopped (steps 330, 332, 328 in FIG. 5).

The system microcomputer 14 that has received the STOP command signal performs STOP control on the CD reproducing unit 24 to stop the reproduction of the CD (steps 182 and 180 in FIG. 3).

In this way, the N.CCRS key can be turned on once in the track mode, and the peak search and automatic optimum recording level adjustment by double-speed playback for all the songs on the CD, and all the songs on the CD and synchronized recording can be performed. Can be performed automatically.

If you want to reduce the time required for peak search,
The H.CCRS key 32 is turned on instead of the N.CCRS key 30.

Then, the system microcomputer 26 of the system deck 20
H.CCRS command signal as high-speed peak search command system
Output to the CD player 10 and perform REC PAUSE control (5th
Steps 334, 336, 314 in the figure).

When the H.CCRS command signal is input from the system deck 20, the system microcomputer 14 proceeds to step 106 in FIG.
After moving to the flow of FIG. 3 and setting the PLD to 0, since the track mode is set, it is checked whether the peak search command is low speed (normal) or high speed (steps 150 to 154).
In this case, since the speed is high in this case, search and double-speed and fast-forward playback control are performed on the CD playback unit 12, and a search for a peak is performed for all songs on the CD from one minute before the end of the performance of each song to the end of the performance. Double-speed and fast-forward playback is started (step 184).

Then, during the peak search and reproduction, the reproduction signal level data is input from the digital signal processing circuit of the CD reproduction section 12 and the LD
(Step 186) and if LD exceeds PLD
The process of rewriting the PLD by the LD is repeated until the double-speed and fast-forward reproduction of the last song of the CD is completed, and the maximum peak level is detected (repetition of steps 188 to 192 and 186 to 192).

At the time of double-speed and fast-forward playback, the input of the playback signal level data from the digital signal processing circuit is performed every eight frames of the A-time.

The processing after the peak search and reproduction of all the songs is completed is the same as described above (steps 166 to 180 in FIG. 3, steps 316 to 328 in FIG. 5).

By performing peak search with double speed and fast forward playback,
The peak search is completed in a much shorter time than in the case of performing the reproduction at double speed.

On the other hand, when the PGM key is turned on to enter the program mode in the same manner as described above and the track numbers 2 and 4 are selected using the numeric keypad and the N.CCRS key is turned on in the program mode, the system microcomputer 14 of the system CD player 10 After the N.CCRS command signal is input from the system deck 20 in the same manner as described above, the program mode is determined in step 152 in FIG. 3, and the process proceeds to step 194 to determine whether the peak search command is low speed (normal). Check if it is fast.

In this case, since it is normal, the process proceeds to step 196, where search and double-speed playback control are performed on the CD playback unit 12, and for all the program Nos. 2 and 4, the peak search for the entire playing time of each song is performed. Start double-speed playback.

At the time of peak search and reproduction, the reproduction signal level data is input from the digital signal processing circuit of the CD reproduction unit 12, and the maximum peak level of the music numbers 2 and 4 is detected (repeated steps 198 to 204).

When the peak search and reproduction of the program No. 4 are completed, the STOP control is performed on the CD reproducing unit 12, and the maximum peak level data is transmitted to the system deck 20 together with the peak search end code (steps 204 and 206). , 208),
After adjusting the electronic volume 22 on the system deck 20 to the optimum recording level for the maximum peak level, when a PLAY command signal is input from the system deck 20, the REC command signal is sent out and the system deck 20 is set to the recording state. At the same time, the program tunes 2 and 4 are sequentially reproduced (steps 210 to 214). When the reproduction of the tune number 4 is completed, a STOP command signal is output to the system deck 20 to stop the recording (step 216, 218) And stop the reproduction of the CD (step 220).

In this way, the N.CCRS key 30 can be turned on once in the program mode, and the peak search and automatic optimum recording level adjustment by double-speed playback for all the program songs only, and all the program songs can be played and synchronized. Recording can be performed automatically.

Therefore, when performing only the program music selected by the user and performing synchronous recording, the peak search is performed only for the program music, so that it is possible to accurately adjust the recording level of the music to be recorded, Since the peak search is performed for the performance time, 1
It is possible to adjust the recording level more accurately than when the minute is targeted.

To shorten the time required for the peak search, the H.CCRS key 32 is turned on instead of the N.CCRS key 30.

Then, the system microcomputer 26 of the system deck 20
H.CCRS command signal as high-speed peak search command system
Output to the CD player 10 and perform REC PAUSE control (5th
Steps 334, 336, 314 in the figure).

When the H.CCRS command signal is input from the system deck 20, the system microcomputer 14 proceeds to step 106 in FIG.
It is determined whether the peak search is slow (normal) or fast after the PLD is set to 0 (steps 150, 152, and 194).
The D playback unit 12 performs search and double-speed and fast-forward playback control to start double-speed and fast-forward playback for peak search for all program music for all playing times (step 226).

At the time of peak search and reproduction, the reproduction signal level data is input from the digital signal processing circuit of the CD reproduction unit 12 and
And the process of rewriting the PLD by the LD if the LD exceeds the PLD is repeated until the double-speed and fast-forward reproduction of the last song of the CD is completed, thereby detecting the maximum peak level (repeating steps 228 to 234). .

By performing peak search with double speed and fast forward playback,
Even in the same program mode, the peak search is completed in a much shorter time as compared with the case of performing double speed reproduction.

On the other hand, turn on the EDIT key to enter the edit mode as described above, enter the edit time using the numeric keypad, select and edit the program song that fits in the tape length, and then press the N.CCRS key 30 in the edit mode. When it is turned on (here, it is assumed that the track numbers 1, 2, 3, 4, and 6 are sequentially registered as program tracks by automatic editing), the system microcomputer 14 of the system CD player 10
N. When a CCRS command signal is input, Y is entered at step 108 in FIG.
It is determined as ES, and the process proceeds to the flow of FIG. 4 to set the PLD to 0 (step 250), and proceeds to step 252 to check whether the peak search is low speed (normal) or high speed (step 252).

In this case, since the speed is low, the process proceeds to step 254, and the CD reproducing unit 1
Search and double-speed playback control are performed on track No. 2 and track numbers 1, 2,
With respect to all of the program songs 3, 4, and 6, double-speed reproduction for peak search for the entire performance time of each song is started.

At the time of peak search and reproduction, the reproduction signal level data is input from the digital signal processing circuit of the CD reproduction unit 12 to detect the maximum peak level of the music numbers 2 and 4 (repetition of steps 256 to 262).

When the playback of the track number 6 is completed, the CD playback unit
After performing STOP control on 12, the maximum peak level data is sent to the system deck 20 together with the peak search end code (steps 264 and 266), and the electronic volume 22 is set to the optimum recording level for the maximum peak level on the system deck 20 side. After adjusting, the PL from the system deck 20 side
When the AY command signal is input, a REC command signal is transmitted to shift the system deck 20 to the recording state (steps 268 and 270), and the track numbers 1 and 2 are set while taking a predetermined time between songs.
2, 3, 4, and 6 program songs are played in order (step
272), when the reproduction of the music number 6 is completed, a STOP command signal is output to the system deck 20 to stop the recording (steps 274 and 276), and stop the reproduction of the CD (step 27).
8).

In this way, the N.CCRS key 30 can be turned on once in the edit mode, and the peak search and automatic optimum recording level adjustment by double speed playback for all automatically edited program songs can be performed. Performance and synchronous recording can be performed automatically.

Therefore, when performing only the automatically edited program tune and performing synchronous recording, the peak search is performed only for the program tune, so that it is possible to accurately adjust the recording level of the tune to be recorded, and Since the peak search is performed for all performance times, 1
The recording level can be adjusted more accurately than in the case where the target is minutes.

If you want to reduce the time required for peak search,
The H.CCRS key 32 is turned on instead of the N.CCRS key 30.

Then, the system microcomputer 26 of the system deck 20
H.CCRS command signal as high-speed peak search command system
Output to the CD player 10 and perform REC PAUSE control (5th
Steps 334, 336, 314 in the figure).

When the H.CCRS command signal is input from the system deck 20, the system microcomputer 14 proceeds to step 110 in FIG.
Then, the process moves to the flow of FIG. 4, and after setting the PLD to 0, it checks whether the peak search is low speed (normal) or high speed (steps 250 and 252). Perform search and double-speed and fast-forward playback control,
With all the automatically edited program songs, double-speed and fast-forward playback for peak search for the entire playing time of each song is started (step 282).

Then, during the peak search and reproduction, the reproduction signal level data is input from the digital signal processing circuit of the CD reproduction section 12 and the LD
And the process of rewriting the PLD with the LD if the LD exceeds the PLD is repeated until the double-speed and fast-forward reproduction of the last song of the CD is completed, thereby detecting the maximum peak level (repetition of steps 284 to 290) .

By performing peak search with double speed and fast forward playback,
Even in the same edit mode, the peak search is completed in a much shorter time as compared with the case of performing the double speed reproduction.

According to this embodiment, when the N.CCRS key (or H.CCRS key) is turned on in the track mode, the system microcomputer 26 of the system deck 20 transmits the N.CCRS (or H.CCRS) command signal to the system. The data is sent to the CD player 10 and the tape recording unit 24 is set to the REC PAUSE state, and N.CCRS (or H.CCR
S) The system microcomputer 14, which has received the command signal, controls the CD playback unit 12 to perform double speed (or double speed and fast forward) for peak search for all songs on the CD for one minute before the end of each song.
During playback for peak search, the playback signal level data is input from the digital signal processing circuit of the CD playback unit 12 to detect the maximum peak level, and after completion of the peak search and playback of all songs on the CD, together with the peak search end code. The detected maximum peak level data is output to the system deck 20 side, and the system microcomputer 26 of the system deck 20 which has input the peak search end code performs level adjustment control of the electronic volume 22 based on the input maximum peak level data. A PLAY command signal is sent to the system CD player 10 by adjusting the recording level to the optimum recording level for the maximum peak level, and the PLAY
The system microcomputer 14 that has input the command signal controls the CD playback unit 12 to play back all the songs on the CD, and sends a REC command signal to the system deck 20.The system microcomputer 26 that receives the REC command signal records the tape. By controlling the unit 24 for recording, the maximum peak level is detected in the digital domain, so the detection accuracy of the maximum peak level is improved, and peak search is performed for all songs on the CD to be recorded. Playback is performed to detect the maximum peak level, and the electronic volume 22 is adjusted to the optimum recording level based on the detection result, so that accurate automatic recording level adjustment for the music piece to be recorded can be performed.

The system microcomputer 14 also responds to the operation of specifying the peak search speed by turning on the N.CCRS key or H.CCRS key.
Switches the peak search speed between low speed and high speed, ie, double speed playback and double speed and fast forward playback, so that a more accurate peak search or a shorter time required peak search can be performed as required by the user. it can.

In addition, level adjustment for the playback signal
Since it can be performed with only 22, the configuration is simpler than in the case where an output level adjusting unit is provided in addition to the recording level adjusting volume as in the related art.

Also, with one operation of the N.CCRS key or H.CCRS key, the peak search and the automatic adjustment of the recording level are optimally performed, and the CD playing and the synchronous recording are all performed automatically, so that all the songs on the CD are dubbed. In this case, the operational burden on the user is reduced.

When the editing mode is set and the user inputs the editing time, which is the time available for recording on the tape, the system microcomputer 14 automatically selects and edits the program tune that falls within the desired editing time. After this, the N.CCRS key (or
When the H.CCRS key is turned on, the system microcomputer 14, which has input the CCRS command signal, controls the CD playback unit 12 to search for the peak of the entire program time of all the program songs in the CD. The maximum peak level is detected by performing double-speed (or double-speed and fast-forward) playback, and after the peak playback of all the program songs is completed, the maximum peak level data detected together with the peak search end code is output to the system deck 20 side. When the electronic volume 22 is adjusted to the optimum recording level, and the PLAY command signal is input, the system microcomputer 14 controls the CD reproducing unit 12 to reproduce all the program tunes. (The time between songs is taken.) By sending the REC command signal to the system deck 20 to start tape recording, the actual tape among all songs on the CD Detecting a maximum peak level perform peak search play to allow only recordable program songs, since the electronic volume 22 based on the detection result can be adjusted to an optimum recording level, recording subject
Even if it is not all the songs on the CD, accurate automatic recording level adjustment for the song to be recorded can be performed, and a peak search is performed for the entire range of the song to be recorded. A more accurate recording level adjustment is possible, and a single operation of the N.CCRS key (or H.CCRS key) automatically searches for peaks and optimizes the recording level, and automatically plays and synchronizes recording of the program tune. In this case, the operation load on the user is reduced even when dubbing the automatically edited program music.

Also, after some desired songs to be recorded are selected in the program mode, the mode is further set to the edit mode, and when the user inputs an edit time which is a recordable time on the tape,
The system microcomputer 14 automatically selects and edits a program tune within a desired edit time while giving priority to a desired recording tune selected by the user. After this, when the N.CCRS key (or H.CCRS key) is turned on, the system microcomputer
14 performs the peak search and reproduction only for the program tunes that can actually be recorded on the tape, so that accurate automatic recording level adjustment for the tune to be recorded can be performed.

Note that in the above-described embodiment, the N.CC
When the RS key (or H.CCRS key) is turned on and the N.CCRS command signal (or H.CCRS command signal) is input, the system microcomputer 14 of the system CD player 10 finishes playing all the songs on the CD. The peak search / playback control is performed for the last minute, but for example, from 1 minute to 15 seconds before the end of the performance of the track numbers 1, 2, and 3 having the highest probability of the maximum peak level of the CD,
The peak search may be played for 15 seconds before the end of the performance of the last song, and the peak search may be completed in a shorter time,
Similarly, in the program mode or the edit mode, the peak search is performed for one minute before the end of the performance instead of the entire performance time of each program music so that the peak search is completed in a shorter time. It may be.

Although an electronic volume has been described as an example of the recording level adjusting means, another circuit such as an electronic volume may be used. When the electronic volume performs the optimal level adjustment control for the maximum peak level, the minimum level or the maximum level is once set, and then the recording level is adjusted to an appropriate recording level for the maximum peak level.

Further, in the above-described embodiment, the case of recording from a CD to a tape has been described as an example, but the present invention can be similarly applied to the case of recording from an LD to a tape.

[Effect of the invention]

According to the disk recording system of the present invention, since the detection of the maximum peak level is performed in the digital domain, the detection accuracy of the maximum peak level is high, and the level adjustment control of the recording level adjustment means is performed based on the detection result of the maximum peak level. Therefore, accurate automatic recording level adjustment becomes possible.

If the program tune that is within the editing time specified by the user is automatically selected and edited from among the recorded tunes on the disc, the peak search is performed only on the program tune that can be actually recorded, so the automatic edit tune The automatic automatic recording level adjustment can be performed.

When the user specifies an editing time after selecting some desired songs for recording in advance, program songs that fall within the editing time are selected and edited while giving priority to the user's desired songs.
In such a case as well, since the peak search is performed only on the program music that can be actually recorded, accurate automatic recording level adjustment for the automatically edited music can be performed.

Also, if the playback speed for low-speed peak search is specified, a high-precision peak search by double-speed playback will be performed, so that the automatic recording level adjustment can be performed quickly and accurately. If you specify the playback speed,
Faster peak search and automatic recording level adjustment by double-speed and fast-forward playback can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a CD recording system according to one embodiment of the present invention, and FIGS. 2 to 4 are system microcomputers of a system CD player in FIG. FIG. 5 is a flowchart showing the operation of the system microcomputer of the system deck shown in FIG. Explanation of main symbols 10: system CD player, 12: CD playback unit, 14, 26: system microcomputer, 20: system deck, 22: electronic volume, 24: tape recording unit, 28: operation unit, 30: N. CCRS key, 32: H.CCRS key.

Claims (3)

(57) [Scope of request for utility model registration] 1. A disk reproducing means for reproducing an audio signal recorded on a disk, comprising a level detecting means for detecting a reproduced signal level in a digital domain, and a recording level adjusting means for reproducing a reproduced signal reproduced by the disk reproducing means. In a disc recording system comprising: a tape recording means for inputting the data through a tape and recording the data on a tape; an editing time inputting means for inputting an editing time; and an editing time inputting operation from among the songs recorded on the disk. Means for selectively editing and registering a program tune which falls within the editing time inputted by the means, and controlling the disc reproducing means based on the peak search command, of the tunes recorded on the disc, registered by the editing means. Playback control means for peak search for performing playback for peak search over a predetermined playing time range in all program songs; Maximum peak level detection means for detecting the maximum peak level of the reproduction signal level detected by the level detection means of the disk reproduction means during peak search reproduction by the peak search reproduction control of the search reproduction control means; Recording level adjustment control means for controlling the recording level adjustment means based on the maximum peak level of the reproduction signal detected by the means, and adjusting the recording level adjustment means to obtain an optimum recording level for the maximum peak level of the reproduction signal. Disc recording system. 2. An apparatus according to claim 1, further comprising a desired music selection operation means for performing a desired music selection operation, wherein said editing means selects and edits a program by giving priority to a desired music selected by said desired music selection operation means. The disk recording system according to claim 1, wherein: 3. A peak search reproduction speed designating means for performing an operation of designating a reproduction speed for peak search to one of a low speed and a high speed, wherein the peak search reproduction control means comprises a peak search reproduction speed designating operation. When low speed is specified by means, double speed playback is performed for peak search, and when high speed is specified,
2. The disk recording system according to claim 1, wherein double-speed and fast-forward reproduction is performed for a peak search.