JPH01173473A - Audio signal recording and reproducing device - Google Patents

Abstract

PURPOSE:To facilitate recording/reproducing which has no pause between musics and which can be excellently listened to by detecting a music signal with a comparing means, and controlling a volume adjusting means with a fade-in signal. CONSTITUTION:The title device is equipped with a comparing means 12, which compares a regenerative signal Sp supplied from an external reproducing device 1 with a comparison level Sr and decides the presence or absence of a music signal Sm, a recording starting means 15, which starts the recording of the music signal Sm from the starting time point of the music signal Sm, a fade-in signal 15, which outputs a fade-in signal Fi from the starting time point of the music signal, and a volume adjusting means 11, which changes the intensity of the musical signal Sm based on the fade-in signal Fi. That is, the starting time point of the music signal Sm is detected by the comparing means 12, and the recording and the output of the fade-in signal Si are started. Further, the volume adjusting means 11 is controlled by the fade-in signal Fi, the intensity of the music signal Sm to be recorded is gradually increased, and fade-in is carried out. Thus, the recording medium without the pause between the musics can be easily prepared from the recording medium with the music space.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the recording and playback of volumetric music, and in particular, to easily create a recording medium with no gaps between songs from a playback medium with gaps between songs. The present invention relates to an audio signal recording and reproducing device.

[Prior Art] As a method of recording a music signal onto a recording medium using a recording/playback device, there is a method of recording a playback signal supplied from an external playback device through a master volume on the side of the recording/playback device.

FIG. 4 is a diagram for explaining a recording method using this type of recording/reproducing apparatus. The reproduction signal outputted from the reproduction device 1 is supplied to the recording and reproduction device 2, and is sequentially passed through the master volume, audio system, and recording system, and is recorded. Some devices use this master volume to perform fade-in and fade-out functions.

Here, the fade-in function and fade-out function will be explained.

■Fade-in function Record a song from the minimum master volume (zero position) or a small position close to it, increase the master volume as time passes, and stop at a certain position. When a recording medium on which this song is recorded is played back, the playback sound gradually becomes louder, making the playback more pleasant to listen to.

■Fade-out function Contrary to the fade-out function, this function records by reducing the volume over time, and when played back, the playback sound gradually becomes quieter.

[Problems to be Solved by the Invention] By the way, in the conventional recording and reproducing apparatus described above, when recording from a playback medium with gaps between songs, the gaps between songs are recorded. In P11, the music would temporarily cut out if you did so.

This invention was made against this background.
It is an object of the present invention to provide an audio signal recording and reproducing device that can easily create a recording medium without gaps between songs from a recording medium with gaps between songs.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a comparison means for comparing a reproduction signal supplied from an external reproduction device with a comparison level to determine the presence or absence of a music signal; recording start means for starting recording of the music signal from the start point of the music signal; fade-in means for outputting a fade-in signal from the start point of the music signal; The apparatus is characterized by comprising a volume adjusting means for changing the intensity.

Note that, in this specification, a signal corresponding to a music piece of a reproduction signal supplied from the outside is referred to as a music signal. Furthermore, signals between songs are regarded as noise signals.

[Function] According to the above configuration, - the comparison means detects the start point of the music signal, and starts recording and outputting the fade-in signal. This fade-in signal controls the volume adjustment means, and the intensity of the music signal to be recorded is gradually increased to perform the fade-in.

[Example] Hereinafter, embodiments of the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the side of the first loading device 1 of the present invention. In the figure, a playback signal s is placed from a playback device l such as a record player, CD player, or amplifier.
p is supplied to an electric master volume 11 and a first input terminal of a comparator 12 via the input end of the recording/reproducing device 10 .

The above-mentioned master volume 11 is electrically driven by a stepping motor (not shown), and the playback signal SP outputted by the master volume 11 is sent to a magnetic tape recording system through an audio circuit 13 consisting of an amplifier and a filter circuit. The data is sent to the recording system 14, etc.

The second input terminal of the comparator 12 is supplied with a comparison level Sr that serves as a reference voltage for comparison. This comparison level S
r is manually set depending on the output level of the playback device 1, and may be switched depending on the type of playback device 1 or the noise level of the playback medium. Comparator 1
2, when the above-mentioned playback signal sp is higher than the comparison level Sr, that is, when the blank part included in the playback signal sp ends and the music signal starts, the music start signal Mn is sent to the system microcomputer. 15.

The system microcomputer 15 has a manually set comparison level S.
r, the initial setting signal In of the master volume 11
A fade-in signal Fi and a fade-out signal Fo are created. Each of these consists of a series of pulse trains,
This is a signal that generates driving pulses for the stepping motor that drives the master volume 11.

First, the initial setting signal In is a signal that indicates the initial position of the master volume 11, and indicates how many pulses this initial position is above the zero point by the number of pulses. On the other hand, the fade-in signal Fi is a signal that instructs at what speed (7 seconds of pulses) and by how much (number of pulses) the stepping motor of the master volume 11 is to be moved from the initial position. Also,
The fade-out signal Fo is a signal similar to the fade-in signal Pi, but is such that the direction of movement of the stepping motor of the master volume 11 is opposite to that of the fade-in signal Fi.

Note that the initial setting signal In is supplied from the system microcomputer 15 to the master volume 11 at the time when the comparison level Sr is set, and the fade-in signal FI is supplied to the music signal S.
The signal is supplied to the master volume 11 from the start point of m. Further, the fade-out signal Fo is sent to the master volume 11 when the operator operates a key indicating the end of the song.

The system microcomputer 15 also supplies a recording start signal RFC that instructs the recording system 14 to start recording at the time when the music start signal Mn is output. The recording system 14 is composed of, for example, a magnetic tape device, and receives a recording start signal RE.
Press C to release the Record Bose key and start recording.

Note that the system microcomputer 11 described above corresponds to the recording start means and fade-in means in the claims. Further, the master volume 11 corresponds to a volume adjustment means.

Next, the operation of this embodiment will be explained with reference to the flowchart in FIG.

In step S1 of FIG. 2, when the comparison level Sr is set by manual operation, this is set by the system microcomputer 15.
is supplied to System microcomputer 15 is at comparison level S
An initial setting signal In corresponding to r is created and sent to the master volume 11. Master volume 11 drives the stepping motor to set master volume 1.
1 is set to the zero point, and then initialized to a position corresponding to the initial setting signal In. It has already been mentioned that the comparison level Sr is determined depending on the type of the playback device l and the noise level of the playback medium, and is manually set.

In step S2, the record BOSE key of the recording system 14 is activated to enter a fade-in wait state.

After such a preparatory stage, the playback device 1 is put into a playback state in step S3. As a result, the reproduction device 1 starts outputting the reproduction signal Sp.

The level of the above reproduced signal Sp is the comparator! 2, the reproduction signal Sp is compared with the comparison level Sr, and when the reproduction signal Sp becomes larger (step S4), the music start signal Mn is outputted from the comparator 12. Note that the music (when the signal Sm is not output, step S
4 to step S5, the recording/reproducing apparatus 10 enters a stop state. In this way, a protective operation is performed.

When the music start signal Mn is output from the comparator 12, the system microcomputer 15 deactivates the record Bose key of the recording system 14 and starts recording (step S6).

At this time, the master volume 11 is at the initial position, that is, the minimum position.

The system microcomputer 15 also forms a fade-in signal Pi from the comparison level Sr, and outputs a fade-in signal Pi to the master volume 11.
(step S7). As described above, this fade-in signal Fi defines the moving speed and amount of movement of the stepping motor of the master volume 11.

The master volume 11 receives this fade-in signal Fi.
As a result, the volume is gradually increased (step S8).

When the supply of the fade-in signal Fi ends and the master volume 11 reaches a predetermined final position, normal recording is performed (step S9). That is, the music signal Sm output from the reproduction device 1 is recorded at a constant recording level.

Eventually, as the end of the song approaches, the operator presses a key (
For example, the record board key) is operated (step 5io). Through this operation, the system microcomputer 15 forms a fade-out signal FO, which is the opposite of the fade-in signal Fi, and sends it to the master volume 11. The master volume 11 gradually lowers the recording level in the opposite direction to the fade-in at the same speed until the end of the song (step 512).

Then, when the music-to-music signal Mn from the comparator 12 disappears, the system microcomputer 15 operates the record-bose key of the recording system 14 to enter the record-bose state (step 813).

By repeating the operations of steps 84 to S13 described above, songs with no gaps between songs and with fade-ins and fade-outs are recorded on the recording medium set in the recording system 14.

Next, a second embodiment of the present invention will be described with reference to FIG.

This second embodiment uses a DAT (D 1
g1tal Audio T aperecode
r) is used.

In the figure, a reproduction signal sp output from a reproduction device 1 is supplied to a master volume 2I via an input terminal of a recording and reproduction device 20. This master volume 21 is manually operated. master volume 2
The reproduced signal sp attenuated in step 1 passes through a low-pass filter (LPF) 22 for removing aliasing noise, and an A/D converter 23 for converting the reproduced signal Sp from an analog signal to a digital signal, and then -D. S P (D 1g
1talS signal Processor) 2
4.

The DSP 24 extracts the music signal Sm from the main signal Sp, subjects it to fade-in and fade-out, and sends it to the recording system 25. The recording system 25 is a recording system of the DAT main body, and records the music signal Sm under the control of the system microcomputer 26.

The system microcomputer 26 compares the human power level information SL supplied from the DSP 24 with the comparison level Sr, determines the presence or absence of the music signal Sm, and creates an initial setting signal In, a fade-in signal Fi, and a fade-out signal Fo. Then, at the same timing as in Example 1, these were transferred to the DSP2.
Send to 4. Further, a recording start signal RFC for operating the record board key of the recording system 25 is supplied to the recording system 25.

Furthermore, start ID information 5T-ID for searching the starting point of a song is supplied to the recording system 25.

This second example is the same as the above-mentioned first odor example.
It is as follows.

■The master volume 21 is operated and set manually.

■Volume adjustment for fade-in and fade-out is done digitally using the DSP24.

(2) The presence or absence of the music signal Sm is determined by the system microcomputer 26 by comparing the input level information SL from the DSP 24 and the comparison level Sr. Note that this comparison can also be performed by the DSP 24.

■Insert start ID information ST-ID indicating the beginning of the song.

According to such a configuration, in addition to the same functions and effects as those of the first cusp embodiment described above, the following functions and effects can be achieved.

(2) The reproduction signal sp output from the reproduction device 1 is supplied only to the master volume 21 b'). That is, unlike the first embodiment, the signal is not branched to the comparator 12.

Therefore, it is possible to avoid an adverse effect on the sound due to branching.

■The change between songs (the beginning of the song) (Koha, Star 1-
ID information ST-ID is recorded. Therefore, high-speed song searches are possible.

In each of the first embodiments described above, both fade-in and fade-out are performed, but it goes without saying that only one of them may be performed.

[Effects of the Invention] As explained above, the present invention detects a music signal by a comparing means, starts recording and outputting a fade-in signal from the start point of ρ, and uses this fade-in signal to adjust the sound 14B. By controlling the means, the music signal to be recorded is made to change strongly or gradually become thicker, so that it is possible to easily record and reproduce music without gaps and with good listening comfort.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the first embodiment,
FIG. 3 is a block diagram showing the configuration of the second embodiment of the present invention, and FIG. 4 is a schematic diagram for explaining the conventional recording and reproducing method. 1...Playback device, tt, 2t...Master volume, 12...Comparator, 14.25
... Recording system, 15.26 ... System microcomputer (Ga recording start method, fade-in means).

Claims (1)

[Scope of Claims] Comparison means for determining the presence or absence of a music signal by comparing a reproduction signal supplied from an external reproduction device with a comparison level; and recording for starting recording of the music signal from the start point of the music signal. The present invention is characterized by comprising: a start means; a fade-in means for outputting a fade-in signal from the start point of the music signal; and a volume adjustment means for changing the intensity of the music signal based on the fade-in signal. Audio signal recording and playback device.