JPS63183658A - Acoustic data reproducing device - Google Patents

Abstract

PURPOSE:To analyze only the acoustic data of a specified channel from the point of time traced back to a prescribed time before, by storing the acoustic data of a prescribed time. CONSTITUTION:A receiver 1 demodulates the RF signal of an acoustic signal from a sonobuoy, and an input selector 2 selects a channel to be sound-recorded, reproduced and analyzed under a control from an analyzer 4, and sends it to a sound recorder and reproducer 3 and a storage device 5. The sound recorder and reproducer 3 sound-records an input acoustic data in a tape, reproduces it and sends it to an output selector 6. The storage device 5 has the RAM of a prescribed bit, stores the acoustic data of a prescribed time portion extending from the present to the past, and executes endlessly an operation for outputting the data of the time traced back by a prescribed time to the past, simultaneously with the input and write of the latest acoustic data. The selector 6 sends one of outputs of the storage device 5 or the sound recorder and reproducer 3, to the analyzer 4 by a control from the analyzer 4, and the frequency of the acoustic data is analyzed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an audio data reproducing device, and in particular, in addition to simultaneously reproducing and analyzing audio data while recording it, the present invention also allows for simultaneous reproduction and analysis of audio data while recording it. The present invention relates to an audio data reproducing device that can analyze audio data from a certain period of time ago.

[Conventional technology]

Conventionally, this type of acoustic data reproducing apparatus, as shown in FIG. 2, includes a receiver 11 that receives and demodulates an RF multiplied signal of an acoustic signal from a sonobuoy or the like; an input selector 2 that selects a channel of acoustic data from the receiver 1; It is composed of a recording/playback device 3 that records and plays back acoustic data, and an analyzer 4 that performs frequency analysis on the acoustic data output from the recording/playback device 3.The acoustic data from the selected sonobuoy is reproduced as a chime by the recording/playback device. , or simultaneously recorded and played back and analyzed with an analyzer.

[Problem that the invention seeks to solve]

The conventional audio data reproducing apparatus described above has the disadvantage that it cannot analyze past audio data because the audio data is continuously recorded and simultaneously analyzed by an analyzer.

The purpose of the present invention is to record current acoustic data on a recording/playback device and, when it is desired to analyze past acoustic data, to stop the recording/playback and perform only the playback operation. This method attempts to solve the above problems by adding a memory device that can store acoustic data of a certain time in order to enable analysis of only the acoustic data of the channel from a point in time from a certain time ago. It is.

[Means for solving problems]

In order to achieve the above object, the pre-meeting data reproducing device of the present invention has the following configuration.

That is, a receiver 1 receives and demodulates an RF multiplied signal of an acoustic signal from a sonobuoy or the like, an input selector 2 selects a channel for analyzing acoustic data from the receiver 1, and a receiver connected to the input selector 2 and configured to input acoustic data. A recording/reproducing device 3 for recording and reproducing data is connected to the input selector 2 in the same way as the recording/reproducing device 3,
A storage device 5 that endlessly writes, reads, and stores a certain amount of time in the past from the current time regarding the same audio data selected by the input selector 2 and recorded in the recording/reproducing device 3, and an output of the audio data to be analyzed. The audio data reproducing apparatus includes an output selector 6 for switching the output of the recording/reproducing device 3 or the storage device 5, and an analyzer 4t for frequency analysis of the audio data.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the audio data reproducing apparatus of the present invention. The configuration of this embodiment is similar to the conventional configuration shown in FIG. It has a container 6.

Next, the operation of this embodiment will be described.

The receiver 1 receives and demodulates the kLF signal of the acoustic signal from the sonobuoy, and the input selector 2 selects the channel for recording, playback, and analysis under the control of the analyzer 4, and inputs the signal to the recording/reproducing device 3 and the memory 5. Send. The recording and reproducing device 3 records the input acoustic data on a magnetic tape and simultaneously reproduces it, and outputs the audio data to the output selector 6.
Send to. The storage device 5 has a random access memory of a fixed amount and a random access memory, and stores acoustic data for a certain period of time in the past from the current time, and simultaneously inputs and writes data of a certain period of time in the past. The operation of outputting and reading is performed endlessly. Output selector 6
is stored in the memory 5 or the recording/reproducing device 3 under the control from the analyzer 4.
The output is switched and sent to the analyzer 4. The analyzer 4 performs frequency analysis of input acoustic data.

Next, easily calculate the amount of memory required.

Assuming the audio data band is 1200Hz, the sample rate is t3.2KH! shall be. Also, the number of audio data input channels t16cl-1. The dynamic range is 8 bits, and the amount of memory that stores the acoustic data of the above specifications is as follows.
It is sufficiently compact and can be realized by M and mounting technology.

/(-amount = 3.2KX16C) IX20 minutes (1200
seconds) x 8 bits = 491.52 Mbits: 500 Mbits (IM bits, 500 RAMs) If you want to reanalyze data during recording or recording and playback, conventionally it was impossible to play back because of continuous recording, but the memory 5 stores acoustic data endlessly by simultaneously writing and reading out acoustic data. For frequency analysis that requires several minutes of data for signal detection, etc., it is possible to analyze only a specific channel back in time while recording or playing back the current acoustic data. It has the effect of

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing the configuration of an embodiment of the audio data reproducing apparatus of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional audio data reproducing apparatus. l...Receiver, 2...Input selector, 3
...Recording player, 4...Analyzer, 5.
...Memory device, 6...Output, force selector. Figure 1 Figure 2

Claims (1)

[Claims] a receiver that receives and demodulates the RF signal of the acoustic signal from the sonobuoy, an input selector that switches the channel of the acoustic data output of the receiver, and a recording/reproducing device that records or records and reproduces the acoustic data from the input selector; A storage device connected to the input selector that endlessly writes and reads acoustic data for a certain period of time from the current time to the past; an output selector that switches between the recording/reproducing device or the memory output; and an output selector. 1. An acoustic data reproducing device comprising an analyzer that performs frequency analysis and display of acoustic data.