JPH05182418A - Pcm audio data recording and reproducing system - Google Patents

Abstract

PURPOSE:To remotely control audio data of other source devices which are placed in the same room, where the device itself is located, by a remote control ler other than the audio data of a mixing console. CONSTITUTION:The device consists of a reproducing means 2 which reproduces PCM audio data recorded in a recording medium 1, a recording means 8 which records PCM audio data on the medium 1, a single or plural input means 10 to 12 which input two channel digital audio data of other source devices and a selection means 16 which selects two arbitrary channels among plural PCM audio data. Inside the audio device itself, a control means 18 is provided to control the means 16. The means 18 is externally controlled by a control device 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PCM audio data recording / reproducing system suitable for application to a PCM audio data recording / reproducing apparatus capable of multi-channel recording / reproducing.

[0002]

2. Description of the Related Art A professional system using a PCM audio data recording / reproducing apparatus is constructed so that audio data can be recorded / reproduced for multiple channels, for example, 24 channels.

When the PCM audio data recording / reproducing apparatus is constructed so that multi-channel recording / reproducing can be performed in this way, the recording / reproducing apparatus itself becomes so large that it cannot be housed in a mixing studio. is there. Therefore, when such a PCM audio data recording / reproducing apparatus is used, this apparatus is usually installed in a dedicated room (machine room) different from the mixing studio.

FIG. 6 is a system diagram showing an outline of such a system. 100 is a PCM audio data recording / reproducing apparatus main body, 200 is a mixing console, and 19 is P.
This is a controller for externally controlling (for example, remote control) the CM audio data recording / reproducing apparatus main body 100.

The mixing console 200 has as many input sources as the number of channels that can be recorded and reproduced by the apparatus main body 100. In this example, a 24-channel multi-channel configuration is shown, and microphones 201a to 201 are used as input sources.
n (n = 24) is illustrated.

In the mixing console 200, the input source is properly adjusted by the manual operation by the director,
A plurality of adjusted audio data (digital audio data) is output from the mixing console 200 and supplied to the apparatus main body 100, and a recording channel is selected according to an instruction from the controller 19. When necessary, the recording channel is reproduced.

Since the apparatus main body 100 becomes large in size in the multi-channel orientation as described above, as shown in FIG.
00 is installed in a dedicated machine room, and the mixing console 200 and the controller 19 are often installed in another mixing studio.

As the PCM audio data recording / reproducing apparatus main body 100, the output of the mixing console 200 can be recorded. In recent years, however, there is a system which can record audio data from another source. Another source is DA as shown in the figure.
There are a T110, a digital VTR (for example, a D2 type digital VTR) 111, a PCM recording / reproducing device 112, and the like.

These separate sources are usually installed in the machine room, but in that case, the input source selecting means are often installed in the apparatus main body 100. This is because the comprehensive system including the other sources has not been constructed, so the emergency measures are taken.

A rotary switch or the like is used as the selection means, and even when the number of connections of another source is large, a rotary switch suitable for the number is used.

[0011]

As described above, when the reproduced audio data is recorded by using another source installed in the machine room or the reproduced audio data of the apparatus main body 100 is recorded by another source, In order to select a source, it is necessary to go to a machine room in a room separate from the mixing studio for operation, which requires a considerable amount of trouble for the operator (director or assistant). Furthermore, recording / reproducing cannot be processed quickly.

Therefore, the present invention solves such a conventional problem, and it seems that a PCM audio data recording / reproducing apparatus main body and a separate source device are installed in a room separate from the mixing studio. Even in such a case, the present invention proposes a PCM audio data recording / reproducing system capable of remotely controlling this separate source device from the mixing studio.

[0013]

In order to solve the above problems, the present invention has a PCM audio data recording / reproducing apparatus main body and a control device for externally controlling the PCM audio data recording / reproducing apparatus. The device body has a PCM recorded on a recording medium.
Reproducing means for reproducing audio data, recording means for recording PCM audio data on this recording medium, single or a plurality of input means for inputting 2-channel digital audio data from another source device, and a plurality of P's.
The PCM audio data recording / reproducing apparatus main body further has a control means for controlling the selecting means, the control means comprising the selecting means for selecting any two channels of the CM audio data. It is characterized by being able to be controlled from the outside by.

[0014]

As shown in FIG. 1, when the magnetic tape 1 is being reproduced, the crossfader 5 is set to P on the line (5-A) side.
The CM audio data is output and the reproduced audio data is obtained. When recording another source, the crossfader 5 is switched to the line (5-B) side by an instruction from the CPU 18.

Then, the selection of another source is performed by the format converter 10, 1 of the audio data supplied from them.
This is done by selecting 1,12. The selected recording PCM audio data is added with an error correction code, interleaved, modulated, etc. in the recording system signal processing circuit 6, and the PCM audio data is recorded on the magnetic tape 1 via the recording amplifier 7 and the recording head 8. It

Here, the channel selection circuit 16 for selecting the crossfader 5, the format converters 10, 11 and 12 is controlled according to an instruction from the CPU 18 based on a control signal from the controller 19. Therefore, the director does not have to go to the machine room and manually select another source.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of a PCM audio data recording / reproducing system according to the present invention will be described in detail with reference to the drawings.

FIG. 1 mainly shows the internal structure of the PCM audio data recording / reproducing apparatus main body 100.

A PCM audio data of an original audio signal to be recorded / reproduced is recorded over multiple channels on a magnetic tape 1 which is a recording medium loaded in the apparatus main body 100. 24 for multi-channel
Indicates the number of channels.

The multi-channel PCM audio data recorded on the magnetic tape 1 is reproduced by the multi-channel reproducing head 2, the reproduced PCM audio data is amplified by the reproducing amplifier 3, and further reproduced by the reproducing system signal processing circuit 4. Processing such as axis correction, error correction, and interpolation is performed.

Then, it is supplied to the crossfader 5. When the cross fader 5 is reproducing the magnetic tape 1 (reproduction mode), the line (5-A) side is selected and reproduced PCM audio data is output. Then, for example, when the recording mode for recording the audio data of another source is selected, the crossfader 5 is set to (5-B).
To the format converter 10, 11,
The recording PCM audio data obtained from 12 is selected.

Recording PCM audio data obtained from one source is composed of audio data for L and R2 channels. Therefore, in the figure, three different PCs
It is configured so that M audio data can be selected. Of course, the source on the mixing console 200 side can be selected, but the description thereof is omitted.

The selected recording PCM audio data is subjected to signal processing such as addition of error correction code, interleaving and modulation in the recording system signal processing circuit 6,
Multi-channel PCM audio data is recorded on the magnetic tape 1 via the recording amplifier 7 and the recording head 8.

The format converters 10, 11, 12 are
AES (Audio) widely known in the audio industry
Engineering Society) and EBU (European Broadc)
It is a converter for converting a serial digital signal formatted in asting union) or the like into PCM audio data (parallel data) for internal recording.

Either the format-converted PCM audio data or the reproduced audio data reproduced from the magnetic tape 1 which has passed through the crossfader 5 is selected by the monitor selector 9. The selected audio data is converted again by the format reverse converters 13, 14, 15 into a serial digital audio signal conforming to the AES / EBU format and output to the outside. If this is used, a monitor at the time of recording (relationship between the reproduced PCM audio data and the PCM audio data to be recorded) can be performed, so that the editing work becomes easy by selecting the monitor mode.

PCM reproduction audio data (internal reproduction audio data) reproduced from the magnetic tape 1 and recording P
The CM audio data is time-divided by the number of channels. For example, when the number of channels is 8 and the number of bits is 16 bits, the PCM audio data is a 16-bit parallel signal which is time-divided into 8 in one quantized sample as shown in FIG.

Therefore, the format converters 10 and 1
It is necessary to select to which channel of 8 channels the recording PCM audio data of 6 channels in total, which is 2 channels each obtained from 1 and 12, is assigned. A channel selection circuit 16 is provided for the source selection and the channel selection. In this example, of the eight channels of PCM audio data (reproduced PCM audio data) selected by the monitor selector 9, reproduced PCM audio data of which channel is output to the outside via the format inverse converters 13, 14, and 15. This channel selection circuit 16 is also used to select whether or not.

In the figure, the format converters 10, 11, 12 and the format inverse converter 13, so that a common channel is selected by the channel selection circuit 16.
14 and 15 are selected at the same time.

FIG. 3 shows a concrete example of the channel selection circuit 16, which is supplied from the internal control CPU 18 of the apparatus main body 100 shown in FIG. 1 to the data bus and the write pulse latch circuits 161 and 162. .. The data is channel setting data. The set channels latched by the latch circuits 161 and 162 are sent to the comparators 163 and 164.

On the other hand, the channel instruction counter 165 is
This corresponds to channel assignment of internal PCM audio data, and counts from 1 to 8 in one quantized sample (see FIG. 2).

Setting channel C set by the CPU 18
When the outputs of S1 and CS2 and the channel instruction counter 5 match, low-level pulses (channel selection signals) CS1 and CS2 are generated at positions corresponding to the matched channels (see FIGS. 4A to 4D).

FIG. 4 shows a case where a set of input sources (for two channels) is selected and an instruction is given to record the input source over two channels of three channels and four channels. At that time, the crossfader 5 is switched to the line (5-B) side at the reproduction timing of the 3rd channel and the 4th channel, and the audio data of the line (5-B) side is recorded.

On the other hand, on the panel of the controller 19 for remotely operating the PCM audio data recording / reproducing apparatus main body 100, as shown in FIG. 5, reproduction PCM audio data is recorded by the number of channels in one quantization of the apparatus main body 100. Switch 19 for switching between PCM audio data
1, 192 (eight in the figure) are arranged. By pressing these switches 191, 192, the apparatus main body 100
The CPU 18 communicates with the CPU 18 to switch between reproduction PCM audio data and recording PCM audio data of an arbitrary channel.

The controller 19 further includes a magnetic tape 1
1 is provided with a display unit 193 for displaying time data in addition to the PCM audio data recorded in FIG.
The time data analyzed by the time data reading circuit 17 shown in FIG.
Minutes, seconds, frames) are displayed.

Further, the remote controller 19 includes
A cue designation function is provided for an arbitrary location recorded on the magnetic tape 1. To specify the cue position, the cue position specifying information (hour, minute, second,
A frame) is input, and this is displayed on the display unit 194. When the execution key 196 is operated, the cue position is designated, and the process moves to the execution process.

In the case of this execution processing, the magnetic tape 1 is run while reading the time data from the magnetic tape 1, and when the magnetic tape 1 has run to the specified position, the magnetic tape 1 is stopped.

The operation panel is further provided with a setting key 197 for channel selection. When the setting key 197 is pressed, the cue position display portion 194 displays, for example, S1-1 (source 1 The display "(channel eye)" appears. This is for inputting the set value of the latch 161 in the channel selection circuit 16 shown in FIG. 3. At this time, for example, if the key 191 or 192 at the position of the third channel shown in FIG. 5 is pressed, S1-1 -3CH is displayed, and the channel selection signal CS1 as shown in FIG. 4 is generated at this time.

Next, when the + key 198 in FIG. 5 is pressed, S1-2 (second channel of source 1) is displayed, and the key 1 at the position of channel 4 is displayed.
When 91 or 192 is pressed, S1-2-4CH is displayed, and the channel selection signal CS2 as shown in FIG. 4 is generated as in the above case.

Further, as shown in FIG. 1, when there are a plurality of different sources, the number of display sources 193, 194 in FIG.
, S2-1 S2-2 S3-1 (first channel of source 3) S3-2 (second channel of source 3), many channel selection signals are generated without increasing dedicated keys. It becomes possible to do. In FIG. 5, if the keys 191 and 192 are of the illuminated type,
It is also possible to make it easier to see by blinking this.

In the example of FIG. 1, the input side format converters 10, 11, 12 and the input side format inverse converters 13, 14, 15 are commonly controlled by one channel selection signal CS1 or CS2. However, it is also possible to control each independently.

[0041]

As described above, according to the present invention, the selection means for selecting the reproduction PCM audio data of another source device is incorporated into the main body of the PCM audio data recording / reproducing apparatus and can be controlled from the outside. It was done.

According to this, the operator can operate the controller 19
Since it becomes possible to select more arbitrary 2 channels,
Since it is not necessary to go to the room in which the device body is installed, the editing work becomes very smooth and the processing becomes faster.

By combining the keys that have existed in the conventional remote controller with the display unit, N × 2
Since the digital audio data of the channel (N is the number of input sources) can be displayed, it has a feature that necessary information can be displayed without increasing the number of keys and the display unit.

[Brief description of drawings]

FIG. 1 is a system diagram mainly showing an apparatus main body in a PCM audio data recording / reproducing system according to the present invention.

FIG. 2 is a configuration diagram of PCM audio data.

FIG. 3 is a system diagram showing a specific example of a channel selection circuit.

FIG. 4 is an explanatory diagram of a channel selection operation.

FIG. 5 is a diagram of an operation panel of the controller.

FIG. 6 is a system diagram of a PCM audio data recording / reproducing system.

[Explanation of symbols]

 5 Crossfader 10, 11, 12 Format converter 13, 14, 15 Format inverse converter 16 Channel selection circuit 18 CPU 19 Controller

Claims (1)

[Claims] 1. A PCM audio data recording / reproducing apparatus main body and a control device for externally controlling the same, wherein the PCM audio data recording / reproducing apparatus main body reproduces PCM audio data recorded on a recording medium. Reproduction means, recording means for recording PCM audio data on this recording medium, single or plural input means for inputting 2-channel digital audio data from another source device, and arbitrary one of plural PCM audio data And a control means for controlling the selection means in the main body of the PCM audio data recording / reproducing apparatus, and the control means can be externally controlled by the control device. P characterized by what was done
CM audio data recording / playback system.