JPS60129987A - Multi-channel editing device - Google Patents

Abstract

PURPOSE:To attain timewise independent edition respectively for multi-channel audio signals by adding plural sub memories. CONSTITUTION:An edition operating unit 13 for edition controls a main memory 10, main buffer memories 15a, 15b, sub memories 16a, 16b...16n, a sub buffer memory and arithmetic section 17a, 17b...17n or the like via a controller 14. An output of the sub memories 16a, 16b...16n is applied to the sub buffer memory and arithmetic sections 17a, 17b...17n, the output of the sub buffer memory and the arithmetic sections 17a, 17b...17n is applied as the output of channels ch1, ch2...chN, the output of the sub buffer memory and the arithmetic sections 17a, 17b...17n is applied to a mixing circuit 18 to obtain a mixing output MIXOUT at the output of the mixing circuit 18. Thus, the timewise independent edition is attained as to each of multi-channel audio signals.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention The present invention relates to a multi-channel editing device, and particularly to an editing device that can edit multiple channels without performing the same editing operation in terms of time.
The present invention relates to a multi-channel editing device that performs temporally independent editing on each of multi-channel audio signal data.

Conventional Technique 6Bi The following three methods are currently being considered as editing methods for editing all of digitally recorded data such as music.

(b) Hand-cut editing (b) Collection of mausoleums by tape copying (c) Editing using memory that can be randomly accessed, etc. Hand-cut editing is an editing in which the song order is simple.
jIt has the advantage of being able to edit the hour wheel in the shortest possible time without the need for any special equipment, and with just a recorder that can edit by hand, but on the other hand, data errors may occur due to fingerprints, etc. due to touching the tape. Easy to do. Edit points are detected by playing back signals recorded on an auxiliary analog track that is separate from the digital audio data, but the sound quality of this auxiliary analog track is comparable to that recorded on a regular analog track. It has the drawback of not being accurate when detecting edit points because it is extremely poor compared to other methods.

Editing using the second tape copy involves sending out the material necessary for editing from the playback machine to one playback machine, one editing machine, and one recorder, and copying the material sequentially from the beginning of the program using the recording @. However, since this editing machine can electronically control the recorder and playback machine, it is the most common method for editing digital data, but it must be done sequentially from the beginning of the editing and sound collection program. In the event of editing corrections, all the programs after fish collection must be recopied, and not only a recorder but also a playback device is required, and the editing device is limited by the model of the recorder. It has the following disadvantages.

The third type of random access editing is a method put into practical use by the applicant, in which a disk memory of 300 megabytes or more is used as memory, the material to be edited is recorded once in the disk memory, the editing point is detected, and the editing point is detected. After registering all addresses, the recorded data is normally read out in real time while cross-fading at the editing points in the specified order.
By copying all of the data, the entire master tape can be obtained.The principle of editing operation of this system will be described in detail with reference to FIGS. 1 to 3. Figure 1 is a block diagram of the editing device, Figure 2 is an editing operation waveform diagram, Figure 3 is a waveform diagram showing editing points of multi-channel data, and 1 in Figure 1 is an editing operation unit. An operation unit 1a for performing work,
The control unit 1b controls the operation of the entire system. Data transfer rate between the data on the ξ data bus, which is transmitted at fixed time intervals equal to the sampling period by the 2U data input/output machine, and the data transferred to the disk memory, which is read out at irregular high speeds. It is composed of a disk memory recording system buffer memory 2a, a data transfer control section 2b, etc. 3 uses a disk memory with a capacity of 540 megabytes. 4 is the calculation unit hs, which controls the level of each data flowing on the data bus.Specifically, it performs level correction and cross-fade during editing, level control by manual operation, and calculations for mixing, and edits the edited sound. is output from 4a. In the operation of the above configuration, first, in accordance with an editing command sent from the editing operation unit 1, only the portion of the editing material on the disk memory 3 to be edited is transferred to the buffer memory 2a in the input/output unit 2. . This data 3a corresponds to each editing tick Tz shown in FIG.
Ts Ta T4 is carved into one piece in the order of use, but there are two ticks at the editing point Tl, T2, Tz, T3
and crossfade between T1.74? In order to do this, it is unnecessary to overlap both of them by temporally shifting them by the cross-fade section CF shown in FIG. For this reason, as shown in buffer memo 1J2a to y21**, two data series A and B with a time lag from each other are sent in parallel to the calculation unit 4, and an inverse motion coefficient is generated in each A and B series. ? : The data are multiplied by the inverse motion coefficient by the device 4b, and then added together, and only the effective parts of both series are joined together to obtain continuous data as an edited back. In this case, as shown in FIG.
Each tick of chN Tchx, Tch2 good TchNtoT
chl', Tch2', TchN' and Tch1'
, Tch 2' % % % % %Tch N' and 'l"chl", TChN '%"'TcbN" and gold cross-fade CF when editing, temporally the same editing points 8a and 8b It is designed so that editing operations can be performed with . This has the drawback of requiring a lot of editing time.

OBJECTS OF THE INVENTION The present invention has been made to eliminate all of the above-mentioned drawbacks, and its entire purpose is to provide a multi-channel automatic editing device that can perform time-independent editing of each multi-channel audio signal. be.

The structure of the invention and the object of the present invention are as follows: -it comprises a main memory means for serially storing multi-channel editing data, and a distribution system for reading output data from the main memory means at high speed and distributing it in parallel. This is achieved by providing a multi-channel editing apparatus characterized in that the multi-channel editing apparatus comprises means for editing each of the multi-channel data independently in terms of time.

Embodiment of the Invention An embodiment of the invention will now be described in detail with reference to FIGS. 4 to 6.

FIG. 4 shows an editing time chart of the multi-channel automatic editing device of the present invention, FIG. 5 is a system diagram of the present invention, and FIG. 6 is a diagram for explaining memory data.

In the multi-channel automatic editing device of the present invention, as shown in FIG.
Then, Tik Tch□, Tik Tchx', and Tik Tc
h1' and tick Tch' are edited by cross-fading them at each time 9a and 9b, and the second channel ch2
Then Tik'l'cha, TikTCh2' and TikTchz' and Tcb++''f respectively at times 9c and 9
Each audio signal data of multi-channel chx, ah2 and \1chN is cross-faded and edited at time d, and 1.1fjN channel chN is edited by cross-fading tick TchN and tick TcM at time 9e. In other words, each tick can be edited at an independent point in time.

An example of a system configuration for performing such editing is shown in Figure 5. In the J-0, 10 is the main memory, and a disk memory or the like is used, and the input terminal 11 is used to input serial audio information data. is provided via the backup memory 12. 13
is an editing operation unit for performing editing work, and is connected via a controller 14 to a manual buffer memory, a main memory 10, main buffer memories 15a, 15b, fil memories 16a, 16n, sub-buffer memories, and an arithmetic section 17a, which will be described later. 17b z~%% 17
There will be a payment system of n. 15a and 15b have a RAM (7 random access memory) configuration with a plurality of main buffer memories, and the output from the main memory 10 is transferred to a plurality of main buffer memories 1
5a-, 15b, and further adds the output of the main buffer memory 15b to a plurality of secondary memories 16a, 16b and 16n.
The number of 6n does not necessarily have to be the same as the number of audio channels, and of course both the main and sub memories are memories that can perform high-speed random access recording and playback. Secondary memory 16a
, 16b N16n are given to the sub-buffer memories and calculation units 17a, 17b, .
The outputs are given as the outputs of channels chl and ChazzSchN, and the mixing circuit 18 is provided with the sub-buffer memory and calculation sections 17a, 17b and 17n.
The output of the mixing circuit 18 is given as the mixing output MIXOUT'. That is, the main buffer memories 15a, 1'5b and the sub memory 1 in the above configuration
6a, 16b SN\16n1 Sub-buffer memory and calculation unit 17a, 17b %S% 17n reads serial editing data recorded in the main memory 10 at high speed,
Even if it is possible to distribute in parallel, it is not necessarily necessary to use these, and in the present invention, it is defined as a total distribution means.

The operation in the above configuration will be explained. Now, consider the case of editing an N-channel signal. When all the ticks of the editing material sound are input into the main memory 10, the audio signal information data is given from the input terminal 11 to the input buffer memory 12,
Here, the timing between the i''L stone data added to the main memory 10 and the input terminal 11 under the control of the controller 14,
The data is recorded in the main memory 10 after the transfer speed is adjusted. This operation does not need to be performed for all channels of input signals at once, and may be recorded one channel at a time.66 is the 0th order editing operation, but in this case, the following step operations (I) to [■] are performed. Repeat.

[I''l First, block units 19a, 19b, 19 in which data from channels 1 to N are stored as shown in FIG.
The data are once read out from the main memory 10 to the first main buffer memory IJ 15a in a form connected by c. Next, these data (are divided into blocks of each channel while adjusting the time by the control unit 14) and are stored in the sub memories 16a, 16b and 16n of each channel.
[11] While data is being transferred from the first main buffer memory 15a to each of the submemories 16a, 16b and 116n, the main memory 10 starts accessing data again, and then Read the following series of data block sounds and start the second one.
0 [■] In each of the auxiliary memories 16a, 16b, . . . 16n, the required part of each channel data is extracted in its entirety according to the editing program, and the transfer rate is converted to the auxiliary buffer memory 17a, 17b 51117n. In addition to the computational cost required for post-editing, editing 7 can be performed within an independent time for each channel as shown in FIG. 4 by outputting the edited data.

[■]] Channel data is output as a continuous signal with each sub-buffer memo collected by the same operation, but
By adding up all these signals by the mixing circuit 18, a mixing output (MIXOUT) of all channel signals is obtained.
) It can also be said to be a total gain.

In addition, in this system, time-division processing of multi-channel signals is performed based on the difference in the transfer rate of each unit, so the transfer rate of data that can be processed in the parts marked ■, ■, ■, and ■ in the figure decreases in that order. It is necessary for the system configuration that the

Of course, the capacity of the system is determined by the degree of transfer rate and the width of the audio signal band.

Advantages of the Invention Since the present invention is constructed and operates as described in the invention, it has the feature that by simply adding a plurality of sub-memories, it is possible to perform temporally independent editing of multi-channel audio signals.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a conventional editing device, FIG. 2 is a waveform diagram of the editing operation shown in FIG. 1, FIG. 3 is a waveform diagram showing all the editing points of conventional multi-channel data, and FIG. The editing time chart of the channel editing device, FIG. 5 is a system diagram of the multi-channel editing device of the present invention, and FIG. 6 is a diagram for explaining the memory. 1.13-...Editing operation unit 2...Data manual/output unit 3■-Disk memory 4...Arithmetic unit section 100
・Main memory 12... Input buffer memory 14...
Controllers 15a, 15...Main buffer memories 16a, 16
b, 16n...Sub memory 17a, 17b
)%N 17n...Fistful buffer memory and arithmetic unit 18...Mixing circuit

Claims (1)

[Claims] It is fully equipped with a main memory means for storing multi-channel edited data in series, and a distribution means for reading all the output data from the main memory means at high speed and distributing it in parallel, so that each channel data can be edited independently in time. A 6-channel multi-channel editing device designed to perform the following functions.