JPH0423289A - Editing device for digital audio signal - Google Patents

Abstract

PURPOSE:To obtain an edit sound satisfactory in point of listening feeling with simple constitution by performing desired fading processing from an edit point by arbitrary designation at a key operating part on data read out from first and second memory. CONSTITUTION:When cross-fading processing is performed, audio sound data SD1, SD2 in the neighborhood of the edit point are stored in first and second edit memory 12, 22. After that, the edit point is decided by the key operation of the key operating part 31, and first and second faders 14, 24 change and output the multiplication factors of multipliers 15, 25 based on characteristic control signals C1, C2 which output the fade-in and fade-out characteristics of the sound data SD1, SD2, and the sound data SD1, SD2 to which fade-in and fade-out processing are applied are mixed at an adder 34, then, an edit signal ED is outputted from an output terminal 10. In such a way, since the fade-in and fade-out characteristic can be changed, it is possible to obtain the edit sound satisfactory from point of listening feeling with simple constitution.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides, for example, two digital audio signals,
For example, the present invention relates to an editing machine for digital audio signals that performs editing by causing mutual fade-outs or fade-ins.

[Summary of the invention]

The present invention provides four digital audio signal compilers. a memory for writing/reading data of a second signal; a means for imparting desired characteristics to data read from the memory and performing fading processing; Second
By having means for instructing arbitrary editing points and desired characteristics of each signal, and means for controlling fading processing based on the output of this instruction, for example, editing between songs can be performed with a simple configuration. Improve the speed and operability of
Moreover, it is an object of the present invention to provide a digital audio signal editing machine that can obtain edited sounds that are audibly good.

[Conventional technology]

For example, when editing digital audio signals, if you want to perform so-called cross-fade processing, where one song is faded in while another song is faded out at the same time, the equipment that is usually required is, for example, a recorder. , it is necessary to prepare two players and one digital mixer.

In other words, in actual cross-fade editing, the sound (playback signal) from the first player is recorded on a recorder, the second player is started at an appropriate point, and the sound is gradually recorded using a digital mixer. A method is used to record the sound on the recorder by shifting the sound (fading out the sound of the first player and fading in the sound of the second player).

[Problem to be Solved by the Invention] However, the editing operation using the above method is quite complicated as it requires the simultaneous operation of multiple devices, and since the editing operation is usually performed manually, it is difficult to perform editing operations in one time. Very skilled operation is required to obtain a good editing sound. Further, even if the editing operation is performed by a skilled person, there is a risk that good editing sound may not necessarily be obtained. For this reason, digital editing machines have been developed that allow each editing operation to be performed automatically and rehearse the editing operations over and over again until a good editing sound is obtained. However, at present, the system configuration is large and very expensive, and the manufacturing of the system requires advanced technology.

By the way, the applicant had previously published Japanese Patent Application Laid-Open No. 1-22028.
In Publication No. 5, the first recording medium reproduced from the first recording medium is
of the PCM signal and the second PCM signal reproduced from the second recording medium.
A PCM signal editing device that performs so-called electronic editing by recording each data near an editing point of a CM signal in a memory,
By reading the data of each PCM signal near the edit point from the memory with the edit points matching, and performing cross-fade processing at the &Ws start point and edit end point, for example, a short insert collection a ( We have proposed a PCM signal editing device that can efficiently and reliably perform cross-fade editing.

In addition, this PCM signal editing apparatus allows editing rehearsal without increasing the scale and price of the apparatus configuration.

However, in this PCM signal editing device, although it is convenient for a collection of 11 short-time inserts at an editing point in a fast-touch piano piece, etc., it is possible to save data of each PCM signal near the editing point from the memory. Since it is read out only when the editing points match, it is difficult to say that the edited sound obtained by the editing is completely good for human hearing.

The present invention has been proposed in view of the above-mentioned circumstances, and it is possible to obtain edited sounds that are better for human hearing, without increasing the size and cost of the configuration.
The object of the present invention is to provide a digital audio signal editing machine that is also capable of editing rehearsal.

[Means for Solving the Problems] A digital audio signal editing machine of the present invention has been proposed to achieve the above-mentioned object, and is capable of editing a first digital audio signal obtained from a first recording medium and a first digital audio signal obtained from a first recording medium. A digital audio signal editing machine for editing a second digital audio signal obtained from a second recording medium, the first digital audio signal for writing/reading data near the editing point of the first digital audio signal. A memory, a second memory for writing/reading data in the vicinity of the editing point of the second digital audio signal, and imparting desired characteristics to each data in the vicinity of the editing point read from each of the memories. fading processing means for performing fade-in or fade-out processing; instruction means for specifying arbitrary editing points and desired characteristics of the first and second digital audio signals; and output of the instruction means; and control means for controlling the fading processing means based on the fade processing means.

Here, the variable desired characteristics of the fading process in the fading process means include, for example, the starting point of fade-in or fade-out, the time of the fading process, and furthermore, the signal within each fading process time. The amount of change (for example, the rate of change in level, etc.) can be mentioned, and this characteristic can be changed.

[Effect]

According to the present invention, each data near the editing point stored in each memory can be read out any number of times, and the fading processing means can change the characteristics of fade-in and fade-out. Editing operations can be rehearsed repeatedly until an audibly good editing table is obtained.

〔Example〕

Embodiments to which the present invention is applied will be described below with reference to the drawings.

FIG. 1 shows a block circuit diagram of a schematic configuration of a digital audio signal editing machine according to an embodiment of the present invention.

In FIG. 1, the editing machine of this embodiment edits a first digital audio signal obtained from a first recording medium and a second digital audio signal obtained from a second recording medium. an editing machine, the first digital audio signal being a first memory for writing/reading data in the vicinity of the editing point of the first digital audio signal;
an edit memory 12, and a second memory 12 for writing/reading data near the edit point of the second digital audio signal.
Fading is a process in which desired characteristics are applied to each data near the edit point read from the second edit memory 22, which is a memory of First as a processing means. the second faders 14, 24 and the multiplier 15.25; the key operation section 31 which is an instruction means for instructing arbitrary editing points and desired characteristics of the first and second digital audio signals; An MPU (micro processing unit) 32 and a first address comparator 13 serve as control means for controlling the fading processing means based on the output of the key operation section 31. It has a second address comparator 23. Here, the above 1. The second recording medium is controlled by a common time code, and write/read operations in the edit memory 12, 22 are made to coincide with the time code. In addition, the variable desired characteristics of the fading process in the fading process means include, for example, the start point of fade-in and fade-out, the time of fading process, and the amount of change in the signal within the process time of fade-in and fade-out. (for example, the amount of change in level).

Word sync WS with a clock having a frequency of 44.1 kHz, for example, is supplied to the input terminals 1 and 4 of the editing machine of this embodiment, respectively. Second address counter 11.
Sent to 21. Audio sound data (for example, so-called PCM data) SD, which is a reproduction signal from a first recording medium (player), is supplied to the input terminal 2.
The data is sent to the first edit memory 12. Audio sound data SD from a second recording medium (player) is supplied to the input terminal 5 and sent to the second edit memory 22 . The audio sound data SD is also supplied to the input terminal 7. Furthermore, terminal 3
．． 6 includes the above 1. Second edit memory 12.2
Audio sound data SD in 2 and SD2
write/read signals RW and RW for writing/reading;
is being supplied.

The key operation unit 31, which is the instruction means, outputs a key operation command signal corresponding to a key operation by an editor who edits an audio signal, and, for example, starts collecting the audio sound data SD, Sn2. Output an edit point command signal to specify each desired edit point (edit point! or edit start point), or specify the above-mentioned characteristics such as fade-in/fade-out time (for example, cross-fade time, etc.) It is designed to output characteristic command signals, etc. By sending each of these command signals to the MPLI 32, the M
The PU 32 outputs each control signal according to each command signal.

The first and second address counters 11.21 are the first and second address counters 11.21. It generates address data AD, . . . AD2 for the second edit memory 12.22, and starts address signals SA, . . . SA! supplied from terminals 8.9. The number of clocks of the 44.1 k7 word song WS is counted based on the above, and the address data AD, , AD, are generated based on this counting data. Further, these address data AD, AD2 are stored in the memory 12.2.
A loop corresponding to the number of memory addresses of 2 is constructed.

The first and second edit memories 12 and 22 are divided into addresses, and the address data AD, .
It writes/reads audio sound data SD, , SD, which are supplied based on data D, respectively.

20 Write/read control is performed using the write/read signals RW, .
This is done in accordance with RW2. The sound data SD, , SD, recorded in this memory 12.22 is, for example, the first . These are sound data SD, , SD, at a location (near the editing point) where the reproduction signal of the second recording medium is desired to be edited. This designation of the vicinity of the edit point can be performed based on, for example, key operations on the key operation section 31.

Further, the address data AD, , AD, are respectively the first . It is also sent to the second address comparator 1323. 8 address comparator 13,
23 is also supplied with edit point address data EP, . This edit point address data EP, , EP, is stored in the memory 12.22.
This data corresponds to the memory address of .

The address comparators 13, 23 compare the edit point address data EP, . . . EP with the address data AD, . The signal is output to the second fader 14.24.

The first and second faders 14.24 are connected to the first and second faders 14.24.
The reproduction signal of the second recording medium, that is, the memory 12.2
Sound data near the editing point from 2 SD,,SD! The fade-in or fade-out characteristics (for example, cross-fade time, etc.) of
For example, the multiplication coefficient in the multiplier 15.25 is changed based on the characteristic control signals C1, Cz and output.

Here, the multiplier 15.25 includes the memory 12.25.
Sound data near the editing point from 22 SD, , SD2
is supplied, and therefore this sound data S
D,, SD, are multiplied by the above multiplication coefficient. The multiplication coefficient changes in accordance with the characteristic control signal C1C2 (
The amount of change in the multiplication coefficient for each word sync WS changes. Therefore, by multiplying the sound data SD, SD, by the multiplication coefficient, each multiplier 15.25 outputs a desired value. Data F, , F2 that have been subjected to fading processing according to the characteristics can now be obtained.

That is, the faders 14 and 24 change the fade-in and fade-out characteristics at the timings (rising and falling timings) of the trigger signals TR, , TR.

Note that the amount of change in the multiplication coefficient can be calculated, for example, using software, so it can be set freely.

For this reason, when performing cross-fade processing using the editing machine of this embodiment, for example, as shown in FIG.
First, the audio sound data near the editing point SD,,S
D, is stored in the memory 12.22, and then by key operations on the key operation unit 31, edit points ePt and ePz are determined. The editing point at this time ep
, and ePz can be set at any position within the range of the data stored in the memory 12.22, and therefore the offset s at the editing points eP+ and ePt
It is also possible to have t. In addition, conversely, the setting value of this offset st is determined first, and the above-mentioned start address data A D +
, A D t may be inversely calculated and set in the address counter 11.21. In this embodiment, this off-sera 1-st
Start address data A D by back calculation from the set value of
1. I am trying to use A D t. Furthermore, this editing point ep1. The characteristics of the fade-out fd and fade-in fd from eT't can also be changed as described above, and conversely, by setting the times fL+ and ftz of the fade-out fd and fade-in fd, the multiplication The amount of change in the coefficient can also be calculated using software. The above MPU 32 also calculates the amount of change in this multiplication coefficient.
It can be done with In addition, in the example shown in Figure 2, the changes in fade-out fd and fade-in fdt are linear, but by changing the multiplication coefficient from fader I4.24 in a non-linear manner, for example, a log curve can be drawn. You can also perform fade-outs and fade-ins. By using this log curve, it becomes possible to obtain an edited sound that is better for human hearing. In this way, by changing the characteristics of fade-out fd and fade-in fd and changing the set value of offset st, it is possible to fade in and fade in and out in various patterns. Processing will also be possible. In addition, settings such as characteristics of each fading process, amount of offset SL, editing point, etc. are stored in the memory 12.22.
Since the data can be read out many times and edited each time, it is possible to obtain the most aurally pleasing edited sound. In other words, you can repeat the rehearsal many times, and for example, by memorizing each setting value when the best edited sound was obtained in this rehearsal, you can obtain a satisfactory edited sound in one go for the actual performance. You will be able to do this. In addition, the data near the editing point stored in the memory 12.22! (Storage time) is determined by the capacity of the memory 12.22, for example, if a memory with a space of 256 bytes is used, it will be about 5.5 seconds, and if a memory of several megabytes is used, a longer time will be obtained. be able to. Furthermore, the characteristics of the above fade-in and fade-out (setting time, etc.)
The time is also set in consideration of the capacity of the memory 12.22, and is usually set to a time of several msec to several hundred m5ec, for example.

Sound data Sp+, sDw near the edit point that has been subjected to fade-in and fade-out processing as described above
(Above F,,F,) are sent to the adder 34, and after being mixed therein, the edit signal ED is output from the output terminal 10.
will now be output.

By the way, as mentioned above, when actually recording data edited with a cross-fade pattern on a recorder and connecting the songs, the data of the sound on the faded-in side (in this case, the above-mentioned The route of the audio sound data 5D2) from the recording medium No. 2 is switched from the memory 22 to the actual player sound.

When doing such a thing, it is necessary to change the position from which the sound of the second recording medium (player) is output depending on the setting position of the offset SL. In fact, as mentioned above,
1st. The second recording medium is controlled by time code, and the memory address at the edit point and the time code at that point are determined down to the word level.
The operation of each recording medium is made to match the operation of the memory. After doing this, the selector switch 33 whose selected R terminal 33a is connected to the output terminal of the edit memory 22 and whose selected terminal 33b is connected to the input terminal 7 is subjected to the above fading process, for example. By switching to select the selected terminal 33b at the time when the reading of the data in the memory 22 is completed (or at the time when reading of the data in the memory 22 is completed), the playback signal from the actual player on the faded-in side can be changed. It becomes possible to actually record the data on the recorder and connect the songs.

In this case as well, the other settings are the memory 12.2 mentioned above.
This is exactly the same as the case of editing rehearsal using 2.

Further, the above-described processing may be rehearsed by moving (previewing) the first and second recording media, for example, tapes.

As described above, the digital audio signal editing machine of this embodiment applies desired characteristics to the data read out from each memory 12. Since it is possible to perform fade-in and fade-out processing,
With a simple configuration, for example, it is possible to improve the speed and operability of editing between songs, and to obtain an editing stand that has a good audible feel.

Note that, for example, if the first and second recording media are both players, the editing machine of this embodiment may
The playback signal (audio sound data SD,) supplied from the second player via the input terminal 2 is faded out, and the playback signal (audio sound data SD,) supplied from the second player via the input terminal 5 is faded out.
) is faded in, edited by loss fade, etc., and output from the output terminal 10. Further, for example, it is possible to fade out the sound from the first recording medium so that it becomes completely inaudible, and then fade in the sound from the second recording medium. One recording medium is used as a recorder, and the second recording medium is used as a player, and the sound of the player is inserted into, for example, the magnetic tape of the recorder, or the sound of the player is inserted continuously into the original signal in the magnetic tape of the recorder. It is also possible to perform editing work such as recording the image, and by making the fade-in and fade-out times short and instantaneous, it is also possible to perform instantaneous insert editing.

〔Effect of the invention〕

In the digital audio signal editing machine of the present invention, first. a memory for writing/reading data in the vicinity of an editing point from a second recording medium; a fading processing means for imparting desired characteristics to the data read from the memory and performing fading processing; A simple configuration is achieved by comprising instruction means for instructing arbitrary editing points and desired characteristics of the second digital audio signal, and control means for controlling fading processing based on the instruction output. For example, it is possible to improve the speed and operability of editing between songs, and to obtain an editing board that is good for human hearing.

In other words, compared to conventional editing machines that manually perform fade-ins and fade-outs, rehearsals can be repeated until the optimal editing table is obtained, so that during actual editing, the editing can be completed automatically in one go. You will be able to do this.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing a schematic configuration of a digital audio signal editing machine according to an embodiment of the present invention, and FIG. 2 is a diagram for explaining the cross-fade performed in the editing machine according to this embodiment. 1......First address counter...Second address counter 2...
......First edit memory 2...
......Second edit memory 3...
......First address comparator 3...
......Second address comparator 4...
・・・・・・・・・・First feeder 4・・・・・・・
...Second fader 5.25...Multiplier l...Key operation section 2...
・・・・・・MPU 3・・・・・・・・・・・・Selector switch 4・・・・・・
・・・・・・Adder

Claims (1)

[Scope of Claims] A digital audio signal editing machine that edits a first digital audio signal obtained from a first recording medium and a second digital audio signal obtained from a second recording medium, comprising: a first memory for writing/reading data in the vicinity of the editing point of the digital audio signal; a second memory for writing/reading data in the vicinity of the editing point of the second digital audio signal; and each of the above-mentioned memories. fading processing means for performing fade-in or fade-out processing by imparting desired characteristics to each data near the editing point read from the data; and arbitrary editing for each of the first and second digital audio signals; 1. An editing machine for digital audio signals, comprising: an instruction means for instructing the point and the desired characteristic; and a control means for controlling the fading processing means based on the output of the instruction means.