JPH03280608A - Digital audio mixer - Google Patents

Abstract

PURPOSE:To simplify the system constitution, to improve the operability and to prevent cost increase by arranging an input signal selection means to select an audio signal from plural channel switches in the inside of a mixer. CONSTITUTION:The mixer consists of an input signal selection means 7 selecting audio signals from plural channels 231-22n, a signal processing means 8 connecting to an input signal selection means 7 through an internal data bus 9 and applying various signal processing to the audio signal and a control means 4 controlling the input signal selection means 7 and the signal processing means 8. That it, the input signal selection means 7 to select the audio signal of the plural channel switches is arranged in the inside of the mixer. Thus, the system constitution is simplified, complicated wiring is prevented, the operability is improved and the cost increase is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital audio mixer, and particularly to a digital audio mixer intended to improve functionality and operability.

[Summary of the invention]

In a digital audio mixer, the present invention includes an input signal selection means for selecting audio signals of a multi-channel switch, so that it also has the function of a conventional input signal selection means, that is, a switcher. The system configuration can be simplified, wiring can be prevented from becoming complicated, operability can be improved, and costs can be prevented from increasing.

[Conventional technology]

Audio mixers that mix audio signals have been used for a long time, and an example of this is disclosed in Japanese Patent Application Laid-Open No. 56-25.
It is disclosed in Japanese Patent No. 814.

Conventionally, a switcher to which a plurality of input lines are connected, for example, a matrix switcher, is provided upstream of an audio mixer for editing.

This matrix switcher is controlled by an editor or host computer, and is controlled independently of the audio mixer.

The signals output from this matrix switcher are supplied to an audio mixer, where they are subjected to predetermined signal processing.

[Problem to be solved by the invention]

In some conventional audio signal systems as described above, a processor that performs signal processing and a controller that controls this processor are separated.

In this way, if a switch is placed before the audio mixer, and if the audio mixer is separated into a processor and a controller, the system configuration becomes complicated, and the wiring becomes complicated, making operability difficult. There was a problem that it turned out to be evil.

In an audio mixer that has a processor and a controller, the switcher is placed spatially close to the processor, so the switcher's switching controller can be placed near the audio mixer's controller. Therefore, the switcher needed to be able to be controlled remotely. As a result, an expensive switcher is required, leading to a problem of increased costs.

Therefore, an object of the present invention is to provide a digital audio mixer in which a switcher is provided inside the audio mixer.

[Means to solve the problem]

The present invention provides a digital audio mixer that performs various signal processing on audio signals of multiple channels, including input signal selection means for selecting audio signals of multiple channels, an input signal selection means and an internal data bus. The signal processing means is connected by a signal processing means for performing various signal processing on the audio signal, and the control means for controlling the input signal selection means and the signal processing means.

[Effect]

In the digital audio mixer according to the present invention, an input signal selection means for selecting audio signals of a plurality of channel switches, that is, a switch inside is arranged inside.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

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

In the configuration shown in FIG. 1, a digital audio mixer (hereinafter simply referred to as mixer) 2 mainly includes a processor 6 and a controller 4.

In the configuration shown in FIG. 1, the audio signals supplied from the VTRII-1n are supplied to the processor 6 of the mixer 2, and the video signals supplied from the VTRII-1n are supplied to the video signal processing circuit 3. Ru. In addition, 251~
25n is a terminal that supplies signals to the VTRs 11-In.

Processor 6 is controlled by control signals from controller 4. That is, by operating a key on a switch operation section provided on a console panel (not shown), a control signal is generated in the main CPU (not shown), and this control signal is transmitted from the main CPU via the terminal 5. and is supplied to the controller 4 of the mixer 2. The controller 4 also functions as a conventional editor, host computer, etc. Inside the controller 4, control signals for controlling the processor 6 are formed based on control signals supplied from the above-mentioned main CPU. is supplied to the processor 6, and the processor 6 is controlled.

The configuration of processor 6 is shown in FIG.

The processor 6 mainly includes a switch 7 for switching the input/output state of the signal line, and a signal processing circuit 8 that performs various signal processing on the audio signal supplied from the switch +7. Also, switcher 7
and the signal processing circuit 8 are connected by a data bus 9. Note that this switcher 7 and signal processing circuit 8 include:
Control signals from the controller 4 are sent to terminals 21 and 22, respectively.
, and each circuit block is controlled by this.

N channels supplied from input terminals 231 to 23n,
For example, a digitized audio signal of 32 channels is controlled by a control signal from the controller 4.
It is selected by switcher 7.

For example, if the VTRs connected to the input terminals 231 to 23n are capable of forming recording patterns in D-1 or D-2 format, the number of recording patterns per 11 VTRs is 4.
Since channels are required, in the case of two cart machines that can accommodate four VTRs, 32 channels are required.

Assuming that the processing capacity of this switcher 7 is M channels,
Among the input N-channel audio signals, any M-channel audio signal is supplied to the signal processing circuit 8 via the data bus 9 . In addition to selecting the M channel audio signal from the N channel audio signals, it is also possible to output a part of the input channel to all the M channels.

The signal processing circuit 8 subjects the supplied audio signal to various types of signal processing, such as equalizer, dynamics, cross-fade, etc., and the audio signal subjected to this signal processing is taken out from the output terminal 24. .

As mentioned above, the switcher 7 is arranged inside the processor 6 of the mixer 2, and the switcher 7 is connected to the processor 6,
In other words, since it is integrated into the mixer 2, the system configuration can be simplified, wiring can be prevented from becoming complicated, operability can be improved, and cost increases can be prevented.

Furthermore, according to this embodiment, the switcher section and the signal processing section can be housed in the same housing, making it possible to downsize the device.

Variant FIG. 3 shows a modification of one embodiment of the present invention.

In this modification, a delay circuit for phase compensation for a video signal, which was conventionally placed before the mixer, is provided inside the mixer.

As shown in the figure, delay circuits 311 to 31n for performing phase compensation with the video signal are connected to input terminals 231 to 23n.
It is arranged inside the processor 6 between the switcher 7 and the switcher 7.

According to the modified example, since the delay circuits 311 to 31n can be provided inside the processor 6 of the mixer 2, the system configuration can be simplified, the operability can be improved, and the cost can be prevented from increasing. It can be prevented.

Note that the other configurations and operations are the same as those of the above-described embodiment, and the same parts are given to the same parts as those of the embodiment, and redundant explanations will be omitted.

〔Effect of the invention〕

According to the digital audio mixer according to this invention,
Since the input signal selection means for selecting the audio signals of the multi-channel switch is provided internally, it can also have the function of the input signal selection means, simplifying the system configuration and reducing the complexity of wiring. This has the effect of being able to prevent this, improve operability, and prevent cost increases.

Further, according to one embodiment, since the switcher section and the signal processing section can be housed in the same housing, there is an effect that the device can be made smaller.

Furthermore, according to the modified example, a delay circuit can be provided inside the mixer, which has the effect of simplifying the system configuration, improving operability, and preventing cost increases compared to the conventional system. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a processor, and FIG. 3 is a block diagram showing the configuration of a modified example. Explanation of main symbols in the drawings: Digital audio mixer, : Controller, 6: Processor, : Switcher,
8: Signal processing circuit, : Data path.

Claims (1)

[Scope of Claims] A digital audio mixer configured to perform various signal processing on audio signals of a plurality of channels, comprising: input signal selection means for selecting the audio signals of the plurality of channels; and the input signal selection means. A digital audio mixer comprising: a signal processing means connected to the audio signal by an internal data bus, and performing various signal processing on the audio signal; and a control means controlling the input signal selection means and the signal processing means. .