WO2017216954A1

WO2017216954A1 - Audio data control device, audio data transmission device, audio data transmission and receiving method, and audio data transmission program

Info

Publication number: WO2017216954A1
Application number: PCT/JP2016/068092
Authority: WO
Inventors: 康範高橋; 光一岡元
Original assignee: ＰｉｏｎｅｅｒＤＪ株式会社
Priority date: 2016-06-17
Filing date: 2016-06-17
Publication date: 2017-12-21
Also published as: JP6549322B2; JPWO2017216954A1

Abstract

This audio data control device (2) is connected so as to communicate with an audio data transmission device (3) that reproduces and transmits audio data, and to receive the audio data. The audio data has connection determination information for determining presence or absence of connection abnormality superposed thereon. The audio data control device (2) comprises: an audio data receiving unit (21) for receiving the audio data; an audio data outputting unit (22) for outputting the received audio data to the outside; a buffer (23) for storing a part of the received audio data as the audio data receiving unit (21) receives audio data; a connection abnormality determination unit (27) for determining whether or not there is an abnormal connection with the audio data transmission device (3) on the basis of the connection determination information superposed on the audio data; and a loop reproduction control unit (26) for repeatedly reproducing the audio data stored in the buffer (23) if it is determined that there is or there appears to be an abnormal connection.

Description

Audio data control apparatus, audio data transmission apparatus, audio data transmission / reception method, and audio data transmission program

The present invention relates to an audio data control device, an audio data transmission device, an audio data transmission / reception method, and an audio data transmission program.

In a club or the like that enjoys dancing according to music, it is required that the DJ select a music that matches the atmosphere of the floor and play it so that the sound is not interrupted. In the unlikely event that music playback is interrupted while on air, the atmosphere of the excitement will be reduced, which must be avoided.
In the technique described in Patent Document 1, the amount of data stored in a buffer for storing music data supplied from the outside is monitored, and when the amount of data stored in the buffer falls below a predetermined amount, the external supply is interrupted. The reproduction of the music is not interrupted by selecting the alternative content in the storage device and reproducing the alternative music.

JP 2014-10849 A

However, in the technique described in Patent Document 1, since a certain amount of music data is stored in the buffer, there is a time delay in actual reproduction. For this reason, the music data stored in the buffer must be prefetched and the amount of stored data must be monitored, but if the operator performs a playback speed reduction or playback stop operation such as a scratch or a queue, the prefetching is performed. There is a problem that synchronization with the processing cannot be achieved.
Also, when the alternative content in the storage device is selected and the alternative music is played back, since the storage device stores the compressed music file, the compressed file must be played back. There is a problem that it must be an essential configuration.

An object of the present invention is to provide an audio data control device, an audio data transmission device, and an audio data transmission / reception capable of preventing music reproduction interruption with a simple structure and without requiring a reproduction device for reproduction control. A method and an audio data transmission program are provided.

The audio data control device of the present invention is
An audio data control device that is communicatively connected to an audio data transmission device that reproduces and transmits audio data, and that receives the audio data,
A determination information receiving unit for receiving connection determination information for determining whether there is a connection abnormality with the audio data transmitting device;
An audio data receiving unit for receiving the audio data;
Audio data received by the audio data receiving unit, an audio data output unit for outputting to the outside,
A buffer for storing a part of the audio data received by the audio data receiver in synchronization with the reception of the audio data receiver;
A connection abnormality determination unit that determines whether or not a connection abnormality with the audio data transmission device has occurred based on the connection determination information superimposed on the audio data;
A loop reproduction control unit that repeatedly reproduces the audio data stored in the buffer when the connection abnormality determination unit determines that the connection abnormality or the connection abnormality can be considered.

The audio data control device of the present invention is
An audio data control device that is communicatively connected to an audio data transmission device that reproduces and transmits audio data, and that receives the audio data,
In the audio data, connection determination information for determining the presence or absence of communication disconnection is superimposed,
An audio data receiving unit for receiving the audio data;
A buffer for storing a part of the audio data received by the audio data receiver in synchronization with the reception of the audio data receiver;
A connection abnormality determination unit that determines whether or not a connection abnormality with the audio data transmission device has occurred based on the connection determination information superimposed on the audio data;
When it is determined by the connection abnormality determination unit that it can be regarded as a connection abnormality or a connection abnormality, a loop reproduction control unit that repeatedly reproduces the audio data stored in the buffer;
It is characterized by having.

The audio data transmitting apparatus of the present invention is
An audio data transmission device that is communicably connected to an audio data control device and transmits the reproduced audio data to the audio data control device,
An audio data playback unit for playing back compressed audio data;
A connection determination information superimposing unit that superimposes connection determination information for determining the presence or absence of communication disconnection on the reproduced audio data;
An audio data transmitting unit for transmitting the audio data on which the connection determination information is superimposed by the connection determination information superimposing unit;
It is characterized by having.

An audio data transmission / reception method performed between an audio data transmission device that transmits reproduced audio data and an audio data control device that is communicably connected to the audio data transmission device and receives the audio data,
By the audio data transmitting device,
A procedure for playing compressed audio data;
A procedure for superimposing connection determination information for determining the presence or absence of communication disconnection on the reproduced audio data;
Carried out
By the audio data control device,
Receiving audio data on which the connection determination information is superimposed;
A procedure for determining whether a connection abnormality has occurred between the audio transmission device and the audio data control device based on the received connection determination information;
If it is determined that a connection error has occurred or can be regarded as a connection error, a procedure for repeatedly playing a part of the received audio data,
It is characterized by implementing.

The audio data transmission program of the present invention causes a computer to function as the above-described audio data transmission device.

The schematic diagram showing the structure of the acoustic control system which concerns on embodiment of this invention. The functional block diagram of the acoustic control system in the said embodiment. The flowchart for demonstrating the effect | action in the said embodiment. The schematic diagram for demonstrating switching of the audio data and loop reproduction | regeneration data in the said embodiment.

[1] Overall Configuration of Audio Data Control System 1 FIG. 1 shows an audio data control system 1 according to an embodiment of the present invention. The audio data control system 1 is a system that performs an audio device control operation in DJ performance, and includes a DJ controller 2 as an example of an audio data control device, a computer 3 as an example of an audio data transmission device, and a speaker 4.
The DJ controller 2 is a main body part of a DJ device operated by an operator, and includes two player units 2A arranged on the left and right sides, and a mixer unit 2B arranged therebetween.

The player portions 2A arranged on the left and right are portions that are operated by an operator to give various audio effects to the audio data to be reproduced, and include a jog dial 2C, a tempo slider 2D, and a performance pad 2E.
The jog dial 2C is a dial with which the operator operates the jog dial 2C to change the rotation speed. By operating the jog dial 2C, sound processing such as scratching and pitch bend can be performed on the music being played.

The tempo slider 2D is a lever that adjusts the track reproduction speed of the audio data stored in the computer 3.
The performance pad 2E is a button that can instantaneously perform effect processing such as loop, cue, slicer, sampler, etc., on the music data being played, when operated by the operator.

The mixer unit 2B disposed in the center is a part for adjusting the audio output and effect processing of the left and right player units 2A, and includes four mixing units 2F to 2I.
In each mixing unit 2F to mixing unit 2I, the left two

mixing units

2F and 2G are used for adjusting the audio output and effect processing of the left player unit 2A, and the two right mixing units 2H and 2I are used on the right side. It is used for audio output adjustment and effect processing adjustment of the player unit 2A.

The DJ controller 2 is connected to the computer 3 via a cable 5 conforming to a USB (Universal Serial Bus) standard capable of bidirectional communication. The cable 5 does not have to be limited to a USB standard-compliant cable, may be a cable compliant with other standards, and may be connected not only by a wired connection but also by wireless communication. Good.
The DJ controller 2 is connected to the speaker 4 via an analog cable 6.

The computer 3 includes a storage device 31 (see FIG. 2) such as a hard disk, and audio data AD1, AD2, AD3,..., Etc. stored in the storage device 31 is converted into audio data composed of serial data by the decoder 32. The data is reproduced and output to the DJ controller 2 via the cable 5.
Audio data reproduced by the computer 3 is output to the DJ controller 2 via the cable 5, and effects are applied based on effect processing performed by the operator operating the DJ controller 2, and converted into analog data. Then, the audio data output to the speaker 4 via the analog cable 6 and subjected to the operation of the operator is output as audio.

[2] Functional block configuration of the audio data control system 1.
FIG. 2 shows a functional block diagram of the audio data control system 1.
The computer 3 includes a storage device 31, a decoder 32, an audio data transmission unit 33, and a connection determination information superimposing unit 34 as an audio data transmission program executed on the arithmetic processing unit.
The storage device 31 is a storage medium such as a hard disk, and stores a plurality of audio data AD1, AD2, AD3. The audio data AD1, AD2, AD3,... Are stored in a compressed state, and are, for example, compressed files of the MP3 (MPEG-1 Audio Layer3) format or the like.

The decoder 32 exemplified as the audio data reproducing unit reproduces the MP3 file and converts it into digital audio data AD1, AD2, AD3.
The audio data transmitting unit 33 transmits the audio data AD1, AD2, AD3... Reproduced by the decoder 32 to the DJ controller 2 via the cable 5.
The connection determination information superimposing unit 34 superimposes connection determination information on the audio data AD1, AD2, AD3... Reproduced by the decoder 32. Specifically, the connection determination information superimposing unit 34 generates a series of serial data by superimposing the packets with flag information on the audio data AD1, AD2, AD3. For the flag information, a flag such as “1” when the connection is normal and “2” when the connection is abnormal may be superimposed at a predetermined interval, or the flag information may be superimposed only when the connection is abnormal. Furthermore, the connection determination information may be determined in a state where it can be regarded as a connection abnormality instead of the concept of flag information. For example, the connection determination may be performed based on whether or not the reproduced audio data itself is transmitted, or may be determined based on whether or not additional information added to the MP3 file is transmitted.

The DJ controller 2 includes an audio data receiving unit 21, an audio data output unit 22, a buffer 23, a tempo analysis unit 24, a reproduction operation control unit 25, a loop reproduction control unit 26, and a connection abnormality determination unit 27.
The audio data receiving unit 21 receives the audio data transmitted from the computer 3 and outputs it to the audio data output unit 22. Further, the audio data receiving unit 21 stores a part of the received audio data in the buffer 23 as loop reproduction data.
Specifically, the audio data receiving unit 21 receives, for example, one bar of the audio data AD1, AD2, AD3... In synchronization with the timing received by the audio data receiving unit 21 and output to the audio data output unit 22. Are stored in the buffer 23 as loop reproduction data.

The audio data output unit 22 converts the audio data AD1, AD2, AD3... Output from the audio data receiving unit 21 into analog data, outputs the analog data to the analog cable 6, and outputs sound from the speaker 4.
The tempo analysis unit 24 analyzes the tempo of the audio data received by the audio data reception unit 21. Specifically, the tempo analysis unit 24 performs LPF (Low Pass Filter) processing on the received audio data, detects a sound pressure level signal equal to or higher than a predetermined threshold, and based on the detected sound pressure level signal. BPM (Beat Per Minute) is calculated and tempo analysis is performed.
During playback of audio data AD1, AD2, AD3, etc., characteristic sections such as an intro section, A melody section, B melody section, chorus section, and outro section that characterize audio data AD1, AD2, AD3,.. In this case, the tempo analysis unit 24 stores the audio data AD1, AD2, AD3... For one bar after the change in the buffer 23 in the buffer 23 as loop reproduction data.

When the operator operates the jog dial 2C, tempo slider 2D, performance pad 2E, etc., the playback operation control unit 25 performs effect processing according to the operation and outputs it as a playback operation control signal to the audio data output unit 22. The audio data output unit 22 performs effect processing using the reproduction operation control signal from the reproduction operation control unit 25, and converts the audio data from a digital format to an analog format signal.

When a connection abnormality occurs between the computer 3 and the DJ controller 2 and the audio data receiving unit 21 cannot receive audio data, the loop reproduction control unit 26 outputs the loop reproduction data stored in the buffer 23 to the audio data output. By outputting to the unit 22 and repeatedly reproducing the loop reproduction data, the sound output from the speaker 4 is prevented from being interrupted.
In addition, when the audio data reception unit 21 resumes reception of audio data, the loop reproduction control unit 26 determines that the audio data is output from the output of the loop reproduction data on condition that the operator operates a predetermined switch of the DJ controller 2. Switching to output of audio data received by the receiving unit 21 is performed. The loop reproduction control unit 26 may be configured to automatically switch from the loop reproduction data to the audio data, triggered by the resumption of reception of audio data by the audio data receiving unit 21 as a trigger.

The connection abnormality determination unit 27 that also functions as a determination information reception unit receives the connection determination information transmitted from the computer 3 and determines whether or not a connection abnormality has occurred. The connection abnormality determination unit 27 determines that a connection abnormality has occurred based on at least one of flag information change, flag information reception, or audio data reception, and the result is determined as loop reproduction control. To the unit 26. In this embodiment, the connection abnormality determination unit 27 receives the connection determination information superimposed on the audio data AD1, AD2, AD3..., But is not limited to this, and the audio data AD1, AD2, AD3. Alternatively, the connection abnormality determination unit 27 may receive the connection determination information transmitted from the computer 3.
The loop reproduction control unit 26 outputs the loop reproduction data in the buffer 23 using the abnormality determination of the connection abnormality determination unit 27 as a trigger. As a case where a connection abnormality occurs, a decoding error of the decoder 32, an erroneous operation of the DJ controller 2, a disconnection of the cable 5, a terminal drop, an abnormal termination of the computer 3, and the like are conceivable.

[3] Operation and Effect of Embodiment Next, the audio data transmitting / receiving method of the present invention will be described based on the flowchart shown in FIG.
When the operator operates the computer 3 to select the audio data AD1, AD2, AD3... In the storage device 31 and starts reproducing the selected audio data AD1, AD2, AD3. The audio data AD1, AD2, AD3... Selected from 31 is called and reproduction of the audio data AD1, AD2, AD3... Is started (step S1).

The connection determination information superimposing unit 34 superimposes connection determination information on the reproduced audio data AD1, AD2, AD3,... At a predetermined timing (step S2).
The audio data transmitting unit 33 transmits the audio data AD1, AD2, AD3... On which the connection determination information is superimposed to the DJ controller 2 via the cable 5 (step S3).
The audio data receiving unit 21 of the DJ controller 2 receives the audio data AD1, AD2, AD3... Transmitted from the computer 3 (step S4), and outputs it to the audio data output unit 22 (step S5). At this time, the audio data receiving unit 21 performs loop reproduction of a part of the audio data AD1, AD2, AD3... For one bar in the buffer 23 in synchronization with the output timing of the audio data AD1, AD2, AD3. Store as data (step S6).

The audio data output unit 22 performs the effect processing on the audio data AD1, AD2, AD3,... Based on the effect processing output from the reproduction operation control unit 25, and then performs digital-analog conversion to output analog audio from the speaker 4. Is output (step S7).
The connection abnormality determination unit 27 receives the connection determination information superimposed on the audio data AD1, AD2, AD3... Transmitted from the computer 3 (step S8), and determines whether or not a connection abnormality has occurred (step S9). ).
If no connection abnormality has occurred, the procedure from step S1 is repeated.

If it is determined that a connection abnormality has occurred, the connection abnormality determination unit 27 outputs an error code to the loop reproduction control unit 26. The loop reproduction control unit 26 switches to the loop reproduction data in the buffer 23, outputs the data to the audio data output unit 22, and reproduces the loop reproduction data (step S10).
The connection abnormality determination unit 27 determines whether or not the connection determination information has returned to normal (step S11), and when it is determined that normal reception of the audio data AD1, AD2, AD3. Repeat playback of loop playback data.

If it is determined that the audio data AD1, AD2, AD3,... Has been returned to normal reception, the loop reproduction control unit 26 has received an instruction to restore the audio data by the operation of the DJ controller 2. Is determined (step S12).
If a command to restore is not input, loop playback is maintained. If a command to restore is input, the process returns to step S1 to resume audio data playback.

Here, the procedure S12 is interposed as shown in FIG. 4, in which the tempo T1 when the audio data AD1, AD2, AD3... Are output and the loop reproduction data stored in the buffer 23. Since the tempo T2 is synchronized, they match. Therefore, the audio data AD1, AD2, AD3... Can be smoothly switched to the reproduction of the loop reproduction data.
On the other hand, when the loop reproduction data is restored to the audio data AD1, AD2, AD3..., The tempo T3 at the start of restoration of the audio data AD1, AD2, AD3. Therefore, when the audio data AD1, AD2, AD3,... Restored from the tempo T1 of the loop reproduction data is switched, the tempo is distorted and the user feels uncomfortable.
Therefore, the operator confirms the restored audio data AD1, AD2, AD3... Using monitor headphones or the like connected to the DJ controller 2, and performs a switching process so as to match the tempo T2 of the loop reproduction data.
Thereby, it is possible to perform a switching process without a sense of incongruity.

According to the present embodiment as described above, when the audio data AD1, AD2, AD3,... Are interrupted simply by providing a simple functional means such as the connection abnormality determination unit 27 in the DJ controller 2, the reproduction by the loop reproduction data is performed. Can be easily switched to.
Further, since part of the audio data AD1, AD2, AD3... Received by the audio data receiving unit 21 is stored in the buffer 23 as loop reproduction data, the DJ controller 2 does not require a decoder, and the DJ controller 2 Can be simplified.

DESCRIPTION OF SYMBOLS 1 ... Audio data control system, 2 ... DJ controller, 2A ... Player part, 2B ... Mixer part, 2C ... Jog dial, 2D ... Tempo slider, 2E ... Performance pad, 2F ... Mixing part, 2G ... Mixing part, 2H ... Mixing part 2I ... mixing unit, 3 ... computer, 4 ... speaker, 5 ... cable, 6 ... analog cable, 21 ... audio data receiving unit, 22 ... audio data output unit, 23 ... buffer, 24 ... tempo analysis unit, 25 ... playback Operation control unit, 26 ... loop reproduction control unit, 27 ... connection abnormality determination unit, 31 ... storage device, 32 ... decoder, 33 ... audio data transmission unit, 34 ... connection determination information superposition unit, AD1 ... audio data, AD2 ... audio Data, AD3 ... Audio data, T1 ... Tempo, T2 Tempo, T3 ... tempo.

Claims

An audio data control device that is communicatively connected to an audio data transmission device that reproduces and transmits audio data, and that receives the audio data,
A determination information receiving unit for receiving connection determination information for determining whether there is a connection abnormality with the audio data transmitting device;
An audio data receiving unit for receiving the audio data;
Audio data received by the audio data receiving unit, an audio data output unit for outputting to the outside,
A buffer for storing a part of the audio data received by the audio data receiver in synchronization with the reception of the audio data receiver;
A connection abnormality determination unit that determines whether or not a connection abnormality with the audio data transmission device has occurred based on the connection determination information superimposed on the audio data;
Audio data, comprising: a loop reproduction control unit that repeatedly reproduces the audio data stored in the buffer when the connection abnormality determination unit determines that the connection abnormality or connection abnormality can be considered Control device.
An audio data control device that is communicatively connected to an audio data transmission device that reproduces and transmits audio data, and that receives the audio data,
In the audio data, connection determination information for determining whether there is a connection abnormality is superimposed,
An audio data receiving unit for receiving the audio data;
Audio data received by the audio data receiving unit, an audio data output unit for outputting to the outside,
A buffer for storing a part of the audio data received by the audio data receiver in synchronization with the reception of the audio data receiver;
A connection abnormality determination unit that determines whether or not a connection abnormality with the audio data transmission device has occurred based on the connection determination information superimposed on the audio data;
Audio data, comprising: a loop reproduction control unit that repeatedly reproduces the audio data stored in the buffer when the connection abnormality determination unit determines that the connection abnormality or connection abnormality can be considered Control device.
An audio data transmission device that is communicably connected to an audio data control device and transmits the reproduced audio data to the audio data control device,
An audio data playback unit for playing back compressed audio data;
A connection determination information superimposing unit that superimposes connection determination information for determining presence or absence of a connection abnormality on the reproduced audio data;
An audio data transmitting unit for transmitting the audio data on which the connection determination information is superimposed by the connection determination information superimposing unit;
An audio data transmitting apparatus comprising:
The audio data control device according to claim 1 or 2,
The audio data control apparatus according to claim 1, wherein the connection determination information is flag information superimposed at a predetermined timing in the audio data.
The audio data transmitting apparatus according to claim 3,
The audio data transmitting apparatus according to claim 1, wherein the connection determination information is flag information superimposed at a predetermined timing in the audio data.
An audio data transmission / reception method performed between an audio data transmission device that transmits reproduced audio data and an audio data control device that is communicably connected to the audio data transmission device and receives the reproduced audio data. There,
By the audio data transmitting device,
A procedure for playing compressed audio data;
A procedure for superimposing connection determination information for determining the presence or absence of a connection abnormality on the reproduced audio data;
Carried out
By the audio data control device,
Receiving audio data on which the connection determination information is superimposed;
A procedure for determining whether a connection abnormality has occurred between the audio data transmitting device and the audio data control device based on the received connection determination information;
If it is determined that a connection error has occurred or can be regarded as a connection error, a procedure for repeatedly playing a part of the received audio data,
An audio data transmission / reception method comprising:
An audio data transmission program for causing a computer to function as the audio data transmission device according to claim 3 or 5.