JP6540007B2 - Recording / playback device with wireless LAN function - Google Patents

Description

  The present invention relates to a recording device, and more particularly to a recording and reproducing device having a wireless LAN function.

  Conventionally, when performing backup recording using a recording and reproducing device, a plurality of recording and reproducing devices are prepared to simultaneously record the same sound source, or a plurality of recording media are attached to the recording and reproducing device and a plurality of recording media are It is known to record the same audio signal at the same time, or to divide a single recording medium into a plurality of recording areas, and to record the same audio signal simultaneously in the respective divided areas.

  Patent Document 1 describes a recording device for recording a digitized audio signal on a recording medium and transmitting the audio data generated during a recording operation to an external processing device communicably connected, It is described that, upon reception of an incomplete notification due to a communication failure from an external processing device, voice data that may have failed to be transmitted is read out from the recording medium and retransmitted.

  Patent Document 2 describes a recording apparatus for writing digital waveform data into an auxiliary storage unit and a backup auxiliary storage unit via a plurality of recording buffers.

JP, 2012-203659, A Patent No. 2823033

  When performing backup recording using a plurality of recording and playback devices, it is necessary to place a plurality of recording and playback devices adjacent to the same environment in order to function correctly, and to simultaneously control the same action. There is a problem with extremely low efficiency.

  In addition, in order to enable mounting of a plurality of recording media, the recording and reproducing apparatus is enlarged to secure a mounting space for the recording medium, and the size is reduced to provide a portable recording and reproducing apparatus. Become.

  Furthermore, in the method of dividing a single recording medium into a plurality of recording areas, there is a problem that the maximum recording capacity of audio data is substantially reduced and it is difficult to record for a long time.

  Patent Document 1 describes that audio data generated during recording operation is transmitted and recorded to an external processing apparatus communicably connected. However, in recent years, particularly, technological progress has been remarkably owned by many users. There is no consideration at all about cooperation with the smartphone etc.

  An object of the present invention is to provide a recording / reproducing apparatus capable of performing backup recording excellent in operability and work efficiency by wireless connection with a portable device having a wireless connection function such as a smartphone.

The present invention comprises an input unit for inputting an audio signal, a processing unit for streaming reproduction while recording the audio signal on a recording medium, and a wireless LAN module for transmitting the streaming reproduced audio signal, the wireless LAN It is possible to back up and record the audio signal by a portable device wirelessly connected to a module, and further, a recording buffer memory in which the audio signal is stored in a first format, and a backup recording in which the audio signal is different from the first format And a streaming reproduction buffer memory which is converted to a second format for storage and stored, the processing means records the audio signal of the first format stored in the recording buffer memory on the recording medium, and , For the streaming playback Characterized by streaming playback audio signal of the second format stored in Ffamemori. The number of portable devices connected wirelessly need not be one, and may be plural.

In one embodiment of the present invention, the processing means, streaming reproduces while recording on a recording medium the audio signal in response to a command transmitted from the portable device.

  According to the present invention, by performing wireless connection with a portable device having a wireless connection function such as a smartphone, it is possible to perform backup recording with excellent operability and work efficiency.

It is a system configuration figure of an embodiment. It is a processing flow chart of an embodiment. It is a structure block diagram of the recording and reproducing apparatus of embodiment. It is a schematic diagram which shows the process of the system controller of embodiment. It is a schematic diagram which shows the other processing of the system controller of embodiment.

Hereinafter, embodiments of the present invention will be described based on the drawings.
FIG. 1 is a system configuration diagram of the present embodiment. The recording and reproducing apparatus 10 wirelessly connects to a portable device having a wireless connection function. In the present embodiment, the smartphone 12 is illustrated as a mobile device having a wireless connection function, and a wireless LAN, more specifically, a Wi-Fi connection is illustrated as a wireless connection. Smartphones with Wi-Fi modules are known and can connect to the Internet via an access point such as a wireless router.

  The recording and reproducing apparatus 10 has a well-known recording and reproducing function, processes an audio signal input from the built-in microphone 22 and the line input terminal 24, records it on a recording medium such as an SD card, and is recorded on the SD card. The audio signal is reproduced and output from the built-in speaker. Also, the recording and reproduction device 10 includes a Wi-Fi module, and performs Wi-Fi connection with the smartphone 12. The Wi-Fi connection between the recording and reproduction device 10 and the smartphone 12 may be a one-to-one connection or a one-to-many connection.

  The user of the recording / reproducing apparatus 10 plays a desired music part, inputs a desired audio signal to the built-in microphone 22 (or line input terminal 24) of the recording / reproducing apparatus 10, and records. Although FIG. 1 shows a part of a musical instrument 14 such as a guitar as a desired music part, any other part such as a bass part, a vocal part, a drum part or the like may be used. The recording / reproducing apparatus 10 inputs an audio signal generated by the musical instrument 14 and records the audio signal on a recording medium such as an SD card for recording, and in parallel with this, performs streaming reproduction of the audio signal to connect with Wi-Fi To the smartphone 12 via

  The smartphone 12 includes a Wi-Fi module, and makes a Wi-Fi connection with the recording / reproducing device 10. The user activates a predetermined application installed in the smartphone 12, operates this application, receives an audio signal transmitted from the recording / reproducing apparatus 10, and records it on a built-in recording medium such as an SD card. Record. Accordingly, the audio signal is recorded in the recording and reproduction device 10 at the same time as the audio signal is recorded via the built-in microphone 22 (or the line input terminal 24) and at the same time, recorded in the smartphone 12. Can be positioned as a backup recording of the recording at 10.

  As described above, the recording / reproducing device 10 and the smartphone 12 are connected via Wi-Fi, the audio signal is recorded by the recording / reproducing device 10 and streaming reproduction is transmitted to the smartphone 12 and backup recording is performed by the smartphone 12. Since the smartphone 12 can be freely disposed at a desired position within the range in which Wi-Fi connection is possible, operability and work efficiency are remarkably improved.

FIG. 2 is a process flowchart of the present embodiment.
First, the recording and reproduction device 10 performs a Wi-Fi connection with the smartphone 12 (S101). Specifically, the Wi-Fi button of the recording / reproducing apparatus 10 is operated to activate the Wi-Fi module. Next, the Wi-Fi button or icon on the smartphone 12 side is operated to activate the Wi-Fi module. When the recording / reproducing device 10 is detected by the smartphone 12 and the SSID which is the identification name of the access point in the wireless LAN of the recording / reproducing device 10 is displayed, the password corresponding thereto is input to establish the Wi-Fi connection. . The password can be displayed on the display unit of the recording and reproducing apparatus 10 to make the user visually recognize. When the Wi-Fi connection is established with the specific smartphone 12, the recording / reproducing apparatus 10 displays that by lighting up an LED or the like. The recording and reproduction device 10 functions as an access point in the wireless LAN. Further, a desired application is activated on the smart phone 12 side, and a transition to a reception waiting state of an audio signal transmitted from the recording and reproduction device 10 is made. The connection between the smartphone 12 and the recording / reproducing device 10 may be established using NFC (Near Field Communication) technology.

  Next, operation of the operation button of the recording / reproducing apparatus 10 is started to start recording, the musical instrument 14 is played, and an audio signal thereof is inputted from the built-in microphone 22 (or the line input terminal 24) (S102).

  Next, while recording and recording an audio signal on a recording medium such as an SD card, the recording and reproduction apparatus 10 performs streaming reproduction of the audio signal in parallel with this (S103). That is, while storing the audio signal in the recording buffer memory, on the other hand, storing it in the streaming reproduction buffer memory, in parallel with this, the audio signal is read from the streaming reproduction buffer memory and supplied to the Wi-Fi module. It transmits to the smart phone 12 (S104). The audio signal stored in the recording buffer memory is recorded on an SD card or the like. The protocol used for streaming playback is arbitrary, and RTSP, MMS, RTMP, HTTP Live Streaming, MPEG-DASH, etc. may be used.

  The smartphone 12 receives the audio signal transmitted from the recording / reproducing device 10, and records and records the signal on a recording medium such as an SD card (S105).

  When the recording in the recording and reproducing apparatus 10 is completed, the user operates the operation button of the recording and reproducing apparatus 10 to stop the recording. Along with this, the recording and reproduction device 10 stops the transmission of the audio signal, and the backup recording on the smartphone 12 also stops.

  In the process of FIG. 2, although recording start / stop in the recording / reproducing device 10 and recording start / stop in the smartphone 12 are separately operated, the smartphone 12 is made to function as a remote control of the recording / reproducing device 10 Recording start / stop may be controlled collectively on the 12 side.

  Specifically, when the Wi-Fi connection between the recording and reproduction device 10 and the smartphone 12 is established, the user activates a predetermined application (application required for monitoring and control of the recording and reproduction device 10) installed on the smartphone 12 . When the recording start is instructed in the predetermined application, the smartphone 12 shifts to a reception standby state, and the smartphone 12 transmits a command instructing the recording / reproducing apparatus 10 to start the recording. The recording and reproduction device 10 starts recording in response to a command from the smartphone 12. Further, when the user instructs to stop recording in the predetermined application of the smartphone 12, the smartphone 12 stops recording, and the smartphone 12 transmits a command instructing to stop recording to the recording / reproducing apparatus 10. The recording and reproduction device 10 stops the recording in response to the command from the smartphone 12.

  Further, in the process of FIG. 2, the same audio signal is simultaneously recorded on the recording and reproduction device 10 and the smartphone 12, but the format does not have to be the same, and may be different. For example, the audio signal is recorded in the wav format in the recording / reproducing apparatus 10, and the mp3 format is recorded in the smartphone 12 in consideration of the communication speed of the Wi-Fi connection. In this case, in the recording / reproducing apparatus 10, the recording buffer memory is stored in the wav format, and the streaming reproduction buffer memory is converted to the mp3 format and then stored.

  The backup recording performed on the smartphone 12 may be used for various applications. For example, by reproducing the audio signal backed up and recorded on the smartphone 12, the audio signal recorded on the recording and reproduction device 10 can be easily and easily confirmed. Also, the user may upload the audio signal backed up and recorded on the smartphone 12 to a service (cloud site) or the like on the Internet.

Next, a specific configuration of the recording and reproduction device 10 in the present embodiment will be described.
FIG. 3 is a configuration block diagram of the recording and reproducing apparatus 10 of the present embodiment. The recording and reproducing apparatus 10 includes a Wi-Fi module 20, a built-in microphone 22, a line input terminal 24, a built-in speaker 30, a display 32, an operation button 34, a system controller 36, and an SD connector 42.

  The Wi-Fi module 20 is a wireless LAN module, and performs Wi-Fi connection with the smartphone 12 and data transmission / reception. The Wi-Fi module 20 is activated in response to the operation of the operation button 34, establishes a Wi-Fi connection with the smartphone 12, and transmits the streaming reproduced audio signal to the smartphone 12. Also, the Wi-Fi module 20 receives a command from the smartphone 12 as necessary, and supplies the received command to the system controller 36. This command is a command for controlling the operation of the recording and reproducing apparatus 10, and is, for example, recording start, recording stop, and the like. The smartphone 12 may acquire the status of the recording / reproducing device 10 from the system controller 36 via the Wi-Fi module 20 and may display the status on the display of the smartphone 12.

  The built-in microphone 22 is a stereo microphone of R channel and L channel, receives an audio signal of a played instrument or the like, and outputs it to the interface (I / F) 26.

  The line input terminal 24 line inputs an audio signal from an external device and outputs the line to the interface (I / F) 26.

  The interface (I / F) 26 outputs an audio signal from the built-in microphone 22 or the line input terminal 24 to the codec (CODEC) 28.

  The codec (CODEC) 28 converts the input audio signal into a digital signal, compresses and encodes the digital signal, and supplies the digital signal to the system controller 36. Also, the audio signal supplied from the system controller 36 is expanded and decoded, converted into an analog audio signal, and output from the built-in speaker 30. The codec (CODEC) 28 may be separated into a module for processing an audio signal from the built-in microphone 22 or the line input terminal 24 and a module for processing an audio signal to be output to the built-in speaker 30.

  The display 32 is composed of an LCD panel or an organic EL panel, and displays various statuses of the recording and reproducing apparatus 10, such as a time counter for recording and reproduction and a recording level. The display 32 includes an LED that indicates the activation state and the connection state of the Wi-Fi module 20. For example, when the Wi-Fi button is operated to activate the Wi-Fi module 20 and the connection standby state is established, the LED blinks, and when the connection with the smartphone 12 is established, the LED lights up and the Wi-Fi button is operated When the Wi-Fi module 20 is turned off, the LED is also turned off.

  The operation button 34 is a button for instructing the operation of the recording and reproducing apparatus 10. The operation button 34 includes a Wi-Fi button for switching Wi-Fi on / off, a recording / playback / stop button, a recording level adjustment button, a track selection button, and the like. The operation button 34 may be configured as a jog dial or a touch button on the display 32.

  The system controller 36 includes a processor and a memory, and controls each unit of the recording and reproducing apparatus 10. The system controller 36 executes various processes using the RAM 40 as a working memory in accordance with the processing program stored in the ROM 38. For various processes, activation / deactivation of the Wi-Fi module 20, establishment of connection with the smartphone 12, processing of an audio signal input from the built-in microphone 22 or the line input terminal 24, recording of the audio signal in the SD card, The streaming reproduction of the audio signal, the supply of the streaming reproduced audio signal to the Wi-Fi module 20, and the like are included. The system controller 36 may comprise multiple processors and may cooperate with a PLD (programmable logic device).

  An SD card is attached to the SD connector 42. The system controller 36 records audio signals by recording them on an SD card. Also, the audio signal recorded in the SD card is read out and output from the built-in speaker 30 via the codec (CODEC) 28.

  While recording the audio signal, the system controller 36 reproduces the stream and sends it to the smartphone 12 as described above. The system controller 36 executes this process using a plurality of built-in buffer memories.

FIG. 4 is a schematic view of processing in the system controller 36. As shown in FIG.
The system controller 36 uses, as a buffer memory, an input buffer memory 36a, a recording buffer memory 36b, and a streaming reproduction buffer memory 36c.

  The audio signal input from the built-in microphone 22 (or the line input terminal 24) is digitized, compressed and encoded, and stored in the input buffer memory 36a. Then, the audio signal is read from the input buffer memory 36a and stored in the recording buffer memory 36b, and converted into a predetermined format for transmission, for example, mp3 format, and then the streaming reproduction buffer memory 36c. Is also stored.

  The audio signal stored in the recording buffer memory 36 b is recorded on the SD card attached to the SD connector 42.

  On the other hand, the audio signal stored in the streaming buffer memory 36 c is stream-reproduced and supplied to the Wi-Fi module 20 and transmitted to the smartphone 12. The streaming reproduction buffer memory 36c arranges buffer memories in a ring shape, and is configured by a ring buffer in which a reading position follows a writing position. By setting an area from the read position to the write position as a data storage area and prohibiting the change of the area, the written data can be correctly read. An area other than that is an area where data can be updated in preparation for the next read. If necessary, the entire buffer memory may be divided into N equal parts (for example, four equal parts) and an area to be updated in one process may be defined.

  FIG. 5 is a schematic view of another process in the system controller 36. This is a case where the recording / reproducing apparatus 10 and the plurality of smartphones 12 are connected by Wi-Fi. Although two smart phones 12a and 12b are illustrated in Drawing 5, it may be more than this.

  The system controller 36 uses an input buffer memory 36a, a recording buffer memory 36b, and streaming reproduction buffer memories 36c and 36d as buffer memories.

  The audio signal input from the built-in microphone 22 (or the line input terminal 24) is digitized, compressed and encoded, and stored in the input buffer memory 36a. Then, the audio signal is read from the input buffer memory 36a and stored in the recording buffer memory 36b, and converted into a predetermined format for transmission, for example, mp3 format, and then the streaming reproduction buffer memory 36c. , 36d are also stored.

  The audio signal stored in the recording buffer memory 36 b is recorded on the SD card attached to the SD connector 42.

  On the other hand, the audio signals stored in the streaming buffer memories 36c and 36d are streamed and reproduced, supplied to the Wi-Fi module 20, and transmitted to the smartphones 12a and 12b, respectively. As in the case of FIG. 4, the streaming reproduction buffer memories 36c and 36d arrange the buffer memories in a ring shape, and are configured by a ring buffer in which the reading position follows the writing position. By setting an area from the read position to the write position as a data storage area and prohibiting the change of the area, the written data can be correctly read. An area other than that is an area where data can be updated in preparation for the next read.

  By simultaneously performing backup recording with a plurality of smartphones 12a and 12b, even if there is a smartphone in which a communication failure has occurred, it is possible to recover by backup recording by another smartphone.

  Moreover, when performing backup recording simultaneously with a plurality of smartphones 12a and 12b, it is also possible to change the format according to the smartphones 12a and 12b and perform backup recording. For example, the smartphone 12a has the same format as the recording / reproducing device 10, and the smartphone 12b has a compressed format.

  As described above, in the present embodiment, since the audio signal is recorded by the recording and reproducing device 10 and the backup recording is performed by the smartphone 12 at the same time, the backup recording with excellent operability and work efficiency is realized.

In the present embodiment, the recording stop in the recording / reproducing apparatus 10 and the recording stop in the smartphone 12 are linked, but even if the recording in the recording / reproducing apparatus 10 is stopped, the backup recording in the smartphone 12 is continued You may continue. For example, when the capacity of the recording medium of the smartphone 12 is larger than the capacity of the recording medium of the recording / reproducing apparatus 10, the capacity of the recording medium becomes full during recording by the recording / reproducing apparatus 10, and more recording is not performed. Even if it becomes possible, it is possible to substantially extend the recording time by continuing the backup recording on the smartphone 12. The advantages of performing backup recording with the smartphone 12 in the present embodiment are as follows.
(1) A simple and easy backup recording can be performed.
(2) The memory capacity of the smartphone 12 can be used to record for a long time.
(3) A backup recorded audio signal can be easily uploaded to the Internet.
(4) By installing a predetermined application on the smartphone 12, the recording / reproducing apparatus 10 can be remotely controlled to control start / stop of recording.
(5) By performing backup recording on a plurality of smartphones 12 simultaneously, reliable backup becomes possible.

  Incidentally, when the capacity of the recording medium becomes full during the recording by the recording and reproducing apparatus 10 and it becomes impossible to record more, when the backup recording by the smartphone 12 is continued, the recording and reproducing apparatus 10 records Although the medium is replaced and recording is resumed, the missing audio signal may be recovered from the smartphone 12 during the recording medium replacement operation. In this case, it is desirable that the recording format of the recording and reproducing apparatus 10 and the recording format of the smartphone 12 be the same.

  Further, in the case where backup recording is performed on a plurality of smartphones 12 as shown in FIG. 5, information on which smartphone 12 the backup recording has been performed may be held on the recording and reproduction device 10 side. For example, the date and time of the backup recording and the file name may be recorded in the SD card together with the ID for specifying each of the smartphones 12a and 12b. By confirming this information, the user can easily confirm on which smartphone 12 a backup of a specific file exists.

  Further, in the present embodiment, while performing backup recording with the smartphone 12, the recording status in the recording and reproduction device 10 may be acquired and displayed on the screen of the smartphone 12, whereby the user is at a position away from the recording and reproduction device 10 The recording state of the recording and reproducing apparatus 10 can be visually recognized.

  Further, in the present embodiment, an audio signal is input from the built-in microphone 22 of the recording and reproducing apparatus 10, but instead of the built-in microphone 22, an external microphone may be used.

  Moreover, in the present embodiment, the Wi-Fi connection is exemplified as the wireless connection, but Bluetooth (registered trademark) or the like may be used.

  10 recording / reproducing device, 12 smartphones, 14 musical instruments, 20 Wi-Fi modules, 22 built-in microphones, 24 line input terminals, 30 built-in speakers, 32 displays, 34 operation buttons, 36 system controllers, 42 SD connectors.

Claims (2)

An input means for inputting an audio signal;
Processing means for performing streaming reproduction while recording the audio signal on a recording medium;
A wireless LAN module for transmitting the streaming reproduced audio signal;
Wherein the wireless LAN module and the audio signal wirelessly connected mobile device as a backup recordable, further,
A recording buffer memory in which the audio signal is stored in a first format;
A streaming reproduction buffer memory in which the audio signal is converted to a second format for backup recording different from the first format and stored;
The processing means records the audio signal of the first format stored in the recording buffer memory on the recording medium, and the audio signal of the second format stored in the streaming reproduction buffer memory A recording and reproducing apparatus having a wireless LAN function characterized by streaming reproduction . In the recording / reproducing apparatus having the wireless LAN function according to claim 1,
A recording and reproducing apparatus having a wireless LAN function, wherein the processing means performs streaming reproduction while recording the audio signal on a recording medium according to a command transmitted from the portable device.

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