JPH0668654A - Digital recorder - Google Patents

Abstract

PURPOSE:To contrive moving of an editing point by continuously performing recording control of a digital signal from a signal conversion means before record start instruction and recording control of the digital signal after record end instruction. CONSTITUTION:First of all, by an operation part 15, after an editing start position and an editing end position are sought out, any channel to be edited is selected. Thus, a first recording part 12 becomes a recording mode at a time T1, and the digital signal from a first signal conversion means 30 is recorded in the first recording part 12 from the time 1 to the time T2. Then, by the opration part 15, when record start is operated at the time T2, a second recoring part 13 is changed to a reproducing mode at the time T2 under the control of a control means 14, and recording operation is stopped. Thus, a succeeding part of the digital signal from the signal conversion means 30 is recorded in the recording part 13. Then, when record end is operated at the time T3, the signal is recorded in the recording part 13 continuously, the signal is added and recorded in the recording part 13 till a fixed time elapses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital recorder for converting an audio signal or an image signal into a digital signal for recording, and more particularly to a digital recorder suitable for signal editing.

[0002]

2. Description of the Related Art A digital recorder uses a magnetic disk or a magnetic tape as a recording medium to convert a voice signal or an image signal into a digital signal for recording and reproduction.

Since such a digital recorder can easily handle a digital signal recorded on a recording medium, it is useful for editing a voice or image signal.

That is, taking a digital recorder designed to handle voice information as an example, in the case of a digital recorder in which a recording medium is a magnetic disk and voices of four channels or more can be handled at the same time, a conventional digital recorder is used. It is widely used for the same purpose as multi-channel analog tape recorders.

Specifically, the digital recorder disclosed in Japanese Unexamined Patent Publication No. 1-220284 is provided with a recording means for recording a digital signal in the vicinity of the editing point when the editing is attempted. This recording means uses a semiconductor memory in addition to the above-mentioned recording medium, and is capable of reproducing at a higher speed than directly reproducing from the recording medium.

Then, before actually editing on a recording medium such as a magnetic disk, editing rehearsal can be performed on a semiconductor memory.

As described above, the digital recorder provided with the recording means having the semiconductor memory for recording the digital signal in the vicinity of the editing point is extremely effective for editing the audio signal.

In the case of such a digital recorder, in order to edit the audio information with the multi-channel digital recorder,
Performs the same operation as editing with a multi-channel analog tape recorder.

For example, for the operation of exchanging points A to B with other audio information for one channel that has already been recorded, first, the digital recorder is put into a reproducing state, and when point A is reached, a recording operation is performed. , If the point B is reached during recording, the recording is canceled.

The operation of starting the recording at the point A and canceling the recording state at the point B can be automatically performed by the control means for replacing the voice information with the time information and controlling the function of the digital recorder. It may be done manually while actually listening to the sound.

In such an editing operation, a good editing result can be obtained when the newly recorded audio information is as scheduled and the timings of the points A and B are as scheduled.

A digital recorder designed for editing an image can also be realized by the conventional technique with a configuration basically equivalent to that described above.

[0013]

By the way, in the conventional digital recorder, the newly recorded update information is as planned when partial replacement is performed in which the signal of a specific channel is replaced with another signal. However, if the timing between the edit start point and the edit end point does not end as planned, there is a problem that the edit is unsuccessful.

In reality, in many cases, the update information itself is as scheduled but the edit start point and edit end point are not as scheduled.

Therefore, in the conventional digital recorder, when the editing fails, there is a problem that it is necessary to return to the editing start point and perform the editing work again.

Therefore, according to the present invention, when an audio or image signal is edited by a digital recorder, the edit point can be moved even if the edit start point and the edit end point are deviated from the scheduled points. The purpose is to provide a simple digital recorder.

[0017]

According to a first aspect of the present invention, there is provided a digital recorder comprising: a first signal converting means for outputting a signal inputted from the outside as a digital signal; and a first signal converting means for outputting the taken signal as an analog signal to the outside. 2 signal conversion means, recording means capable of recording and reading digital signals, operation means for instructing the start and end of recording of digital signals to this recording means, and the first before the start of recording from the operation means Based on the recording control of the digital signal from the signal converting means to the recording means and the recording start instruction and the recording end instruction from the operating means, the first signal converting means from the recording start instruction to the recording end instruction Control means for continuously performing recording control of the digital signal and the digital signal from the first signal converting means after the recording end instruction to the recording means. It is intended to.

According to a second aspect of the present invention, the recording means includes first and second recording sections, and the control section controls the first recording section before the recording start instruction by the operating section. The recording control of the digital signal is performed, and when the recording start instruction is issued, the recording interruption control of the first recording unit and the continuation of the digital signal recorded in the first recording unit to the second recording unit are performed. The control for recording is performed.

According to a third aspect of the present invention, in the digital recorder, the recording means includes first and second recording sections, and the control means controls the first recording section before the recording start instruction by the operating means. The recording control of the digital signal is performed, and when the recording start instruction is issued, the recording interruption control of the first recording unit and the continuation of the digital signal recorded in the first recording unit to the second recording unit are performed. The recording is controlled, and when the recording end instruction is given, the digital signal is continuously recorded in the second recording section for a preset time, and then the recording operation of the second recording section is terminated. It was done like this.

[0020]

The operation of each of the above-mentioned inventions will be described below.

The first signal converting means in the digital recorder according to the first aspect outputs a signal input from the outside as a digital signal. The control means controls the recording of the digital signal from the first signal conversion means before the recording start instruction from the operation means to the recording means. Further, the control means, based on the recording start instruction and the recording end instruction from the operation means, the digital signal from the first signal converting means from the recording start instruction to the recording end instruction and the first signal after the recording end instruction. Recording control of the digital signal from the signal converting means to the recording means is continuously performed.

As a result, in addition to the digital signal from the first signal converting means from the recording start instruction to the recording end instruction, the recording means continuously receives digital signals before the recording start instruction and after the recording end instruction. Recorded in.

In the digital recorder of the second aspect, the control means controls the recording of the digital signal to the first recording section of the recording means before the recording start instruction by the operating means. Further, the control means, when a recording start instruction is issued, controls the recording interruption to the first recording section and continues the digital signal recorded in the first recording section to the second recording section of the recording means. Perform recording control.

As a result, in the first recording section of the recording means,
In addition to the digital signal from the first signal converting means from the recording start instruction to the recording end instruction, the digital signal before the recording start instruction is also recorded. Further, the second recording section of the recording means continuously records a digital signal subsequent to the digital signal recorded in the first recording section.

According to another aspect of the digital recorder of the present invention, the control means controls the recording of the digital signal to the first recording section of the recording means before a recording start instruction is given by the operating means. Further, the control means, when a recording start instruction is issued, controls the recording interruption to the first recording section and continues the digital signal recorded in the first recording section to the second recording section of the recording means. Control to perform recording, and further control to cause the second recording unit to continue to record the digital signal for a preset time at the time when the recording end instruction is given, and thereafter to end the recording operation of the second recording unit. I do.

As a result, in the first recording section of the recording means,
In addition to the digital signal from the first signal converting means from the recording start instruction to the recording end instruction, the digital signal before the recording start instruction is also recorded. Further, in the second recording section of the recording means, a digital signal subsequent to the digital signal recorded in the first recording section is continuously recorded, and the digital signal after the recording end instruction is set for a preset time. Only recorded.

[0027]

EXAMPLES Examples of the present invention will be described in detail below.

FIG. 1 shows a 4-channel digital recorder 1 which handles four signals particularly suitable for editing a multi-channel audio signal.

The digital recorder 1 includes a first signal converting means 30 for outputting a signal input from the outside as a digital signal, and a second signal converting means 40 for outputting the taken signal as an analog signal to the outside. Recording means 50 capable of recording and reading digital signals, operation means 15 for instructing recording start and recording end of digital signals to the recording means 50, and first signal conversion before recording start instruction from operation means 15 Based on the recording control of the digital signal from the means 30 to the recording means 50 and the recording start instruction and the recording end instruction from the operation means 15, the first signal conversion means 30 between the recording start instruction and the recording end instruction.
And a control means 14 for continuously performing recording control of the digital signal from the first signal conversion means 30 after the recording end instruction to the recording means 50.

Further, the digital recorder 1 is provided with a data bus 11 for transmitting control signals for each component and digital signals for recording or reading.

The first signal converting means 30 has input terminals 2, 3, 4, and 5 to which an analog signal is input, and converts the input analog signal into a digital signal and sends it to the data bus 11. It is supposed to do.

The second signal converting means 30 takes in a digital signal from the data bus 11, converts the taken digital signal into an analog signal, and outputs it to the output terminal 7,
It is designed to output from 8, 9, 10 to the outside.

The recording means 50 comprises first and second recording sections 12 and 13 connected to the data bus 11.

The first recording section 12 outputs, for example, 3 bits of a 16-bit digital signal having a sampling frequency of 48 kHz.
If you can record for about 30 seconds, 30 per channel
Since 0 kbyte is enough, it can be realized by a semiconductor memory.

The second recording section 13 outputs a 16-bit digital signal with a sampling frequency of 48 kHz, for example.
Since it is necessary to record four channels for two hours or more, it can be realized by connecting several magnetic disks in parallel.

However, since the first recording unit 12 and the second recording unit 13 are managemently distinguished as a memory as described later, there is no physical distinction, and the first recording unit 12 is used.
It is of course possible to realize the second recording means 13 and the second recording means 13 on the same magnetic disk.

The control means 14 controls each constituent element connected to the data bus 11 in the order shown in FIG. 4 and has a time management function for managing the address on the time axis of the digital signal.

The operation means 15 is provided with an operation section, which will be described in detail later, for performing various operations, and is adapted to send operation information to the control means 14.

As shown in FIG. 2, the operating means 15 is
An operation switch 16 for operating a recording start instruction,
An operation switch 17 for performing an operation of recording end instruction,
It is provided with edit position operation units 19 and 20, reproduction or recording direction operation units 21 and 22, recording channel selection units 23, 24, 25 and 26 for selecting four recording channels, and a stop operation unit 27. .

Further, the operating means 15 is provided with a display section 18 for displaying the address and the like of the digital signal on the time axis. The display of this address corresponds to the tape counter of the tape recorder.

The editing position operation units 19 and 20 are used to search for an editing position, and the reproduction or recording direction operation unit 21 and
Reference numeral 22 designates the direction when recording or reproducing a digital signal.

Recording channel selectors 23, 24, 25,
Reference numeral 26 designates which channel is set to the recording mode, and the stop operation unit 27 operates to stop the operation.

Next, the operation of the above digital recorder 1 will be described with reference to FIGS.

First, the editing position operating sections 19 and 20 and the reproduction or recording direction operating sections 21 and 22 search for an editing start position and an editing end position.

Next, the recording channel selectors 23, 24,
One of the channels to be edited is selected at 25 and 26 (S1), and the reproduction is started before the editing start position.

When the editing start position is reached during reproduction, the recording start switch 16 is operated.

After that, when the editing end position is reached, the recording end switch 17 is operated.

With the above operation, the recording channel selection section 23,
A new digital signal is recorded in the channels selected by 24, 25, and 26 in place of the previously recorded digital signal.

FIG. 3 shows the digital recorder 1 shown in FIG.
2 conceptually shows the operation of the first recording unit 12 and the second recording unit 13 when the editing work is performed.

In FIG. 3, the upper part shows the operation of the first recording section 12,
The interruption shows the operation of the second recording unit 13, and the lower part shows the overall operation of the first and second recording units 12 and 13.

The vertical axis of FIG. 3 represents the operation mode (recording / reproducing) of the first and second recording units 12 and 13, and the horizontal axis represents the passage of time.

The first and second recording sections 12 of the recording means 50,
13 operation modes, the upper position is the recording mode,
The lower position is the reproduction mode, and the operation means 15 is operated at time T2.
The time when the recording start operation was performed at T, and T3 the time when the recording end operation was performed.

As shown in FIG. 3, the first recording section 12 has a T
Up to 2 is in recording mode, and after T2 is in playback mode.

The second recording section 13 shifts from the reproduction mode to the recording mode at T2 and is again in the reproduction mode at T4.

The first recording section 12 is a ring memory in the recording mode up to T2.

The ring memory is a memory which starts recording from the first address of the memory and ends recording at the last address, and continues recording from the first address.

Therefore, although the first recording unit 12 is in the recording mode until T2 shown in the lower part of FIG. 3, the digital signal actually remaining in the first recording unit 12 is from T1 immediately before T2. Up to T2.

Further, the second recording section 13 continues recording until T4, which is a preset time, even if the recording end operation is performed.

The recording from T3 to T4 is an additional recording, and this time is managed by the control means 14. The additional recording time managed by the control unit 14 may be the same as the recording time of the first recording unit 12, and may be, for example, about 3 seconds.

Therefore, when the first recording section 12 and the second recording section 13 are combined, as shown in the lower stage, T2, T3
It will be recorded from T1 to T4 with a space between them.

The time information of T1, T2, T3, and T4 is represented by a frame number obtained by further subdividing the unit of hour, minute, second, and second, and one is determined for each time.

T2 and T3 are determined by the time when the operating means 15 is operated, and T1 and T4 are automatically determined by the control means 14 when T2 and T3 are determined.

The time information is managed by the control means 14 as additional information of the digital signals recorded in the first and second recording sections 12 and 13.

Actually, a series of time information is added to the data of the digital signal and recorded in the first and second recording sections 12 and 13.

Next, the digital recorder 1 as described above
The editing procedure will be described in more detail with reference to FIG.

First, the editing position operating portions 19 and 20 and the reproduction or recording direction operating portions 21 and 22 find the editing start position and the editing end position, and then the recording channel selecting portions 23 and 2
One of the channels to be edited is selected at 4, 25 and 26 (S1).

As a result, the first recording section 12 is set to the time T1.
In the recording mode, the digital signal from the first signal converting means 30 is transferred from the time T1 to the time T2.
It is recorded in 2 (S2).

The operation switch 16 of the operation means 15
Thus, when the recording start operation is performed at time T2 (S3),
Under the control of the control means 14, the second recording unit 13 sets the time T2.
Then, the recording mode is set, and the first recording section 12 changes to the reproduction mode at time T2 to stop the recording operation (S4).

As a result, the subsequent portion of the digital signal from the first signal converting means 30 is recorded in the second recording section 13 (S5).

Next, when the recording end operation is performed by the operation switch 17 of the operation means 15 at the time T3 (S6), the digital signal is continuously recorded in the second recording section 13, and a time T4 after a predetermined time. The digital signal is additionally recorded in the second recording unit 13 (S7). At time T4, the second recording section 13 switches to the reproduction mode.

As described above, the digital signal before the recording start operation is recorded in the first recording section 12, and the second recording section 1 is recorded.
By recording the digital signal after the operation of ending the recording in 3, even if the timing of the recording start or the timing of the recording end is deviated from the scheduled timing, the timing after the recording is finished Can be shifted.

That is, in a typical editing operation, the recording start timing and the recording end timing are accurate, and no particular correction is necessary.

However, according to the present embodiment, even if the recording start timing or the recording end timing is deviated, it is possible to make some corrections before and after the recording is completed. Therefore, the necessity of re-performing the recording process for editing again is significantly reduced.

The present invention can be variously modified and implemented within the scope of the gist other than the above-mentioned embodiment.

For example, in the embodiment shown in FIG. 1, the example in which the additional recording is performed after the recording is finished is shown, but the recording time of the additional recording may be zero in some cases.

The means for realizing the first recording section and the second recording section may be any medium capable of recording a digital signal, and there are many means such as a semiconductor memory, a magnetic disk, an MO, and the like. The control means may define which part of the medium is used as the first or second recording section.

Further, when the first recording section is composed of a semiconductor memory and the second recording section is composed of a magnetic disk,
After the recording of the digital signal to be replaced is completed, the portion recorded in the first recording section is linked to the second recording section and collectively recorded on the magnetic disk. It is convenient that the can be reused for other editing.

Further, in the embodiment, the case of editing the audio signal is shown, but the present invention can be implemented with a similar configuration even in a digital recorder for editing an image signal.

[0079]

Since the present invention has the above-described configuration, in a digital recorder for editing a voice or image signal, when the original signal is partially replaced, the signal is as planned. If recorded in the recording means, it is possible to provide a digital recorder in which the replacement timing can be shifted back and forth after the recording is completed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a plan view of the operating means in the embodiment of the present invention.

FIG. 3 is a timing chart showing the operation of the first and second recording units in the embodiment of the invention.

FIG. 4 is a flowchart showing the operation of the first and second recording units according to the embodiment of the present invention.

[Description of Reference Signs] 1 digital recorder 12 first recording unit 13 second recording unit 14 control unit 15 operating unit 30 first signal converting unit 40 second signal converting unit 50 recording unit

Claims (3)

[Claims] 1. A first signal converting means for outputting a signal inputted from the outside as a digital signal, a second signal converting means for outputting the taken signal as an analog signal to the outside, and recording and reading of the digital signal. To the recording means, operation means for instructing recording start and recording end of a digital signal to the recording means, and digital signal from the first signal converting means before recording start instruction from the operation means to the recording means. Based on the recording control and the recording start instruction and the recording end instruction from the operation means, the digital signal from the first signal conversion means from the recording start instruction to the recording end instruction and the first signal conversion after the recording end instruction A digital recorder comprising: a control unit that continuously controls recording of a digital signal from the unit to the recording unit. 2. The recording means includes first and second recording parts, and the control part performs recording control of the digital signal to the first recording part before a recording start instruction is given by the operating part. At the same time, when the recording start instruction is issued, the recording interruption control of the first recording unit and the control of recording the continuation of the digital signal recorded in the first recording unit to the second recording unit are performed. The digital recorder according to claim 1. 3. The recording means includes first and second recording sections, and the control section controls recording of the digital signal on the first recording section before a recording start instruction is given by the operating section. At the same time, when a recording start instruction is issued, recording interruption control of the first recording unit and control of recording the continuation of the digital signal recorded in the first recording unit to the second recording unit are performed, and recording is performed. The control for continuously recording the digital signal in the second recording means for a preset time at the time when the end instruction is given, and then terminating the recording operation of the second recording means.
The described digital recorder.