JPH03290874A - Signal recording method and signal recorder using the recording method - Google Patents

Abstract

PURPOSE:To execute the editing by accumulating a digital code train obtained by A/D conversion into a data block of the quantity to which a random access can be executed, and writing this data block into a random file memory by a sector unit, respectively. CONSTITUTION:A digital code train obtained by executing A/D conversion by an A/D converting apparatus 12 is accumulated in a data block of the minimum unit to which a random access can be executed in a buffer memory 13. In such a state, whenever data of 256 bytes is accumulated in the buffer memory 13, a writing device 14 gives the data block accumulated in the buffer memory 13 to a random file memory 15, and writes one data block in one sector of the random file memory 15. Accordingly, a signal of a sound at an arbitrary time point can be read out of the random file memory 15 at any time. In such a way, it is possible to fetch only an arbitrary part of signals continued in series and to edit it to one continuous signal.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a signal recording device suitable for use, for example, in editing various sound signals.

"Prior Art" For example, when editing audio signals distributed and collected over multiple channels into a single channel signal, the start timing and end timing of each channel must match.

In order to match this timing, conventionally, the audio signals recorded in multiple channels were played back at the same timing using separate playback devices, and the played back signals were imported into a single recording device and synthesized. .

``Problem to be solved by the invention'' Conventionally, multiple playback devices play back the signals of each sound at the same timing, and the played signals are imported into a single recording device and synthesized, so multiple playback devices are required. There is a drawback.

Furthermore, it is difficult to reproduce sound signals from multiple reproduction devices at the same timing.

Furthermore, in the past, a considerable amount of trial and error was required to perform editing such as extracting the sound signal of one channel at a desired timing and combining it with the signal of another channel at the desired timing position. There wasn't.

An object of the present invention is to record a signal that allows editing such as extracting and playing the signals of multiple channels from one playback device at any timing, and compositing them at any tying position of the signals of other channels. It is an object of the present invention to provide a method and a signal recording device using this method.

``Means for Solving the Problems'' In this invention, a continuous series of analog signals is AD converted, and this AD converted digital code string is stored in a randomly accessible amount of data blocks, and the stored data blocks are We propose a signal recording method that records in random file memory.

By recording with this signal recording method, the sound signal at any point in time can be read out from the random file memory at any time.

As a result, it is possible to extract only an arbitrary part of a continuous signal and edit it into one continuous signal.

Furthermore, by recording multiple sound signals using the signal recording method of the present invention, it is possible to easily perform editing such as superimposing the sound of any channel at any time on the sound of any channel. can.

"Embodiment" A signal recording method according to the present invention will be explained using FIGS. 1 and 2.

In FIG. 1, 10 indicates an analog signal source.

The analog signal output from the analog signal source 10 is sampled and held at predetermined time intervals in a sample and hold circuit 11, and the sampled and held analog voltage is AD converted in an AD converter 12.

In the present invention, a digital code string obtained by AD conversion by an AD converter 12 is stored in a buffer memory 13 in a randomly accessible minimum unit data block.

When using a magnetic storage medium such as a floppy disk or a hard disk, the minimum randomly accessible data block is l sector (!f
The amount of data recorded in the i-key trunk (name representing one section divided above the trunk) is the minimum unit that can be randomly accessed. Normally, 256 bytes of data can be recorded in one sector of a magnetic recording medium.

Therefore, in this example, every time 256-height data is stored in the buffer memory 13, the writing device 14 gives the data block stored in the buffer memory 13 to the random file memory 15, and writes one sector of the random file memory 15. One data block is stored in the buffer memory 13 and the time is 1.
This is sufficiently long compared to the time required to transfer and write the data block to the random file memory 15. Therefore, when writing is started, the instantaneous breadth memory 17 becomes empty.

The writing position in the random file memory 15 is written in a separately prepared index data file, and this index data file manages the name given to the analog signal and the writing position of the data block written in the random file.

The writing device 14 is controlled by a microcomputer, and the random file memory 15 can be controlled by, for example, a floppy disk device, a node disk device, or a RAM disk using semiconductor memory.

Figure 2 shows the writing status of data blocks, sector SI
l+ Sli, 5lz-...Sl? The sound data blocks in l are A r, A t, A s,
A4...A7 is written. Sector after this data block sequence S Z l +S zt+ S
I3. Another sound data block B+, eight, Bs...B7 are recorded in Sta.......

The data blocks recorded in this way are divided into sectors S,...
S, Sli, SI4...S can be arbitrarily designated and read out as a unit. Therefore, for example, sectors S, Sli and S31. can be accessed to read data blocks A, A, and A, l, and these three data blocks At, A=, A, l can be edited into one continuous signal.

Another method is to read data blocks A1 and B, store these two data blocks in two buffer memories, and edit them into a signal in which two sounds are superimposed by reading them from the buffer memories at the same time. Can be done.

FIG. 3 shows a signal recording apparatus using the signal recording method according to the present invention.

The signal recording device shown in FIG. 3 represents the authority of a device that simultaneously captures and records a plurality of analog signals.

10A, IOB, IOC, and IOD each indicate an analog signal source. Each analog signal output from these analog signal sources 10A to IOD is sent to a sample and hold circuit 11A.
-11D and AD converters 12A to 12D, respectively, into digital code strings and buffer memories 13A to 13D.
13D is stored in a data block.

In this example, the buffer memories 13A to 13D are two stages of buffer memories that store one data block connected in cascade, and the buffer memory in the previous stage performs the operation of storing a digital code string in a data block, so that one data block is stored. This shows the case where the data block is transferred to the downstream stage buffer and authorized so that it can wait for a write command from the writing device 14.

By configuring the buffer memories 13A to 13D in this way, it is possible to prevent the buffer memory from overflowing when writing multi-channel signals to one random file memory 15, and to sequentially write multi-channel data blocks to the random file memory 15. 15 can be written.

4 and 5 show the writing status of data blocks in the random file memory 15.

FIG. 4 shows writing areas AA and BB for each sound signal.

A CCDD is secured in advance, and data blocks A, ~A, l are stored in each sector in each write area AA~DD.

A case is shown in which B, ~B, , C, -C,, D, ~D7 are written.

Further, the example shown in FIG. 5 shows a case where data blocks are written in accordance with the order in which data blocks are taken in.

No matter which of the writing methods shown in FIG. 4 and FIG. Written in part.

By using this index file, data blocks of one channel's sound can be read out continuously, or only data blocks at arbitrary timing can be read out.

FIG. 6 shows an example of a playback device. A reading device I6 is connected to the random access memory 15. This successive device 16
is authorized by a microcomputer. The index file written in the random access memory 15 is read in advance into the RAM 16A built in the microcomputer, and the data blocks are, for example, A+, B+, according to commands input from the keyboard 16B.
.

CI, D+, Ax, Bt, Cx, D2. As, BsC
,,D,...read out in order,A,,A.

It is possible to read arbitrary data blocks such as Aq and Aq, and to freely access the random file memory 15.

The data block read by the sequel device 16 is taken into the buffer memories 17A to 17De.

Buffer memories 17A to 17D are 1 as in the previous example.
It has a structure in which two stages of buffer memories that can store data blocks are connected in cascade.

The data blocks output from the buffer memories 17A to 17D can be mixed by a digital mixing circuit to form a single signal.

In this example, each data block is transferred to the DA converters 18A to 1.
8D, inversely converts it into an analog signal and outputs it, amplifies the analog signal with amplifiers 19A to 19D, and outputs the output signal from amplifiers 19A to 19D to speakers 20A to 2.
A case is shown in which the configuration is configured to drive 0D.

By configuring the playback device in this way, data blocks of each channel can be read out arbitrarily.

"Effects of the Invention" As explained above, according to the present invention, a continuous analog signal is AD converted, the AD converted digital code string is stored in the smallest unit data block that can be randomly accessed, and this stored Since the data block is written to the random file memory 15, any written data block can be read out at any time.

Therefore, the signal of one channel is read out continuously, and the signal of the other channel is read out at any timing with respect to this continuously read out signal, and the signal is superimposed at any timing. Can bottom out.

Therefore, sound can be edited without using multiple recording devices.

Note that although the case where buffer memories are provided separately for each channel has been described above, the buffer memories for a plurality of channels can also be configured by a RAM with a large capacity.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining the signal recording method of the present invention, FIG. 2 is a timing chart for explaining the invention in detail, and FIG. 3 is a diagram of a recording apparatus using the signal recording method of the present invention. Pro 1 showing examples. 4 and 5 are timing charts for explaining the operation of the device shown in FIG. 3, and FIG. 6 is a reproducing device that reads and reproduces data blocks recorded by the signal recording method according to the present invention. It is a block diagram for explaining an example. 10, IOA~10D: Analog signal source, 11° 11A
~11D=sample hold circuit, 1212A~12D
: AD converter, 13.13A to 13D: Buffer memory, 14: Writing device, 15: Random file memory.

Claims (3)

[Claims] (1) AD convert a continuous series of analog signals,
A signal recording method characterized in that a digital code string obtained by conversion is accumulated in a randomly accessible amount of data blocks, and the accumulated data blocks are written in a random file memory in units of sectors. (2) A: an AD converter that performs AD conversion on a continuous series of analog signals; B: a buffer memory that stores the digital code string AD-converted by the AD converter into a randomly accessible data block; and C: , a random file memory that stores the accumulated data block in a random file every time a data block is accumulated in the buffer memory, and a signal recording device comprising: (3) A. Multiple AD converters that AD convert analog signals of multiple channels, and B. Digital code strings AD-converted by these multiple AD converters, each stored in randomly accessible data blocks. C. A writing device that selects and takes out the stored data block each time a data block is stored in the plurality of buffers; D. A writing device that selects and takes out the data block selected by the writing device. A signal recording device consisting of a random file memory that sorts signals by channel and stores them in random files.