JPS6214304A - Voice recording controller - Google Patents

Abstract

PURPOSE:To record only the contents to be recorded with a simple operation by using a sound recording transfer control means which reads selectively the recording contents of a temporary memory up to a silent position when or after a sound recording request is given and transfers the read recording contents to outside. CONSTITUTION:A voice data memory 8 is read out when a sound recording flag is set and the digital data on the addresses which are increased one by one for each sampling time. Then the D/A conversion output is delivered to a tape recorder 5. When the coincidence is secured between the reading final address and the address under a reading state, the sound recording flag set in terms of software is reset. In other words, the silent part of the sound signals is detected and recorded and only the voiced part of the voice information is recorded. Then the hearing request sent from the silent position before the hearing request or the contents up to the subsequent silent position are sent to a tape recorder set outside according to the hearing request given from a listener. Thus it is possible to sound record only the contents to be recorded with a simple operation.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an audio recording control device for controlling the recording of audio signals output from audio equipment such as radio receivers, microphones, and telephones. be.

[Conventional technology]

2. Description of the Related Art Conventionally, tape recorders have been used to listen to music, conversations, the contents of meetings, etc. through radio receivers, microphones, telephone handsets, etc., and record the contents, and are widely used.

When recording using a tape recorder, one of the commonly used recording methods is to start recording at the same time as you start listening and record the entire content until the end, or to record the entire content while listening. There is a method of carefully examining the content, predicting the next content from between the layers of the content, and selectively recording only the content that you want to record.

[Problem that the invention seeks to solve]

In recording using the conventional tape recorder device as mentioned above,
Regardless of the recording method, the recorded content will inevitably be larger than the content that the listener truly wants to record, and it is difficult to listen to only the recorded content that the listener wants to refer to by playing it back after recording. , extra time is required, as well as recording media,
In other words, in this case, there were drawbacks such as the need for extra tape.

Although this drawback can be alleviated considerably by carefully performing selective recording operation 11, it is tedious to perform this task while listening, and a new problem arises in that if you are not careful, you may make recording mistakes. It comes out.

This invention was made to solve the above-mentioned problems, and provides an audio recording control device that allows the listener to record only the content that they really want to record with simple operations. The purpose is to obtain.

[Means for solving problems]

The audio recording control device according to the present invention includes: a recording circuit that converts an audio signal output from an audio device into a signal passed through recording; a temporary audio memory for storing the output signal from the recording circuit; -1- A silence detection means for detecting a silent part of an audio signal, a silence position memory for storing a silence position on the temporary audio memory, and -1- Detection No. 16 from the silence detection means The silent position of the audio signal,
a silent position recording means for recording in the silent position memory; an audio information recording means for recording a signal from the recording circuit in the temporary audio memory while erasing old content after a predetermined period of time; If so, recording transfer control means is provided for selectively reading and transmitting the recorded contents of the temporary memory from the silent position that occurred before that time to the silent position that occurred at or after the time when a recording request was made. It is something.

[Effect]

In this invention, since the audio signal and its silent position are constantly recorded from the past content for a predetermined time in the temporary audio memory and the silent position memory, the listener can record the content after listening to the content uttered as audio. When it is determined that the content is desired to be recorded, by issuing a recording request, the recording transfer control means records the contents of the temporary audio memory from the silent part before the recording request to the silent part that appears after that. Transfer to playable external recording media.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is an overall configuration diagram of a recording device using an audio recording control device according to an embodiment of the present invention.

In the figure, 1 is a sound device, AM and FM radio.

This includes record players, microphones, telephone handsets, and the like. This is particularly the case when a telephone handset or a microphone at a lecture is passed through this audio recording control device. Further, 2 is an amplifier, and 3 is a speaker, through which the audio signal output from the amplifier 2 can be heard. These are well known conventional audio devices. 4 is an audio recording control device according to an embodiment of the present invention, which inputs an audio signal output from the audio device 1 and a recording request command signal output from a recording request means operated by a listener, and outputs an audio signal or It outputs a signal that corresponds one-to-one, and will be explained in detail later.

Reference numeral 5 denotes an audio recording recirculation device, which is a device capable of recording and reproducing the output signal of the audio recording control device 4; if an audio signal is output, a conventionally known tape recorder or the like can be used for this. If a coded digital signal is output, this corresponds to a well-known digital audio recording and reproducing device that is composed of a recording unit such as a digital recorder or a semiconductor memory, a decoder, an audio restoration circuit, and the like.

Here, the audio recording control device 4 starts recording to the audio recording and reproducing device 5 in synchronization with outputting the audio information determined to be recorded to the audio recording and reproducing device 5 in accordance with a recording request command from the listener. The audio recording control device 4 outputs a signal instructing to stop recording when the output of the audio information is completed, and the audio recording control device 4 outputs a signal 18 which passes the audio signal output from the audio device 1 for recording. Recording circuit 41 for converting into numbers
, a temporary audio memory 43 having a predetermined storage capacity and for recording the signal from the recording circuit 41, and the recording circuit 4.
an audio information recording means 42 for recording the signal from the audio device 1 into the temporary audio memory while erasing old recorded content after a predetermined period of time; a silence detection stage 44 for outputting the silent part of the audio signal from the audio device 1; -1- Temporary audio memory 43L
Silence at
” - By the detection signal from the recording sound edge output means 44 "- Silence position recording means 45 which stores the silent position of the recorded audio signal in the silent position memory 46, and when there is a recording request from the listener, audio recording is performed. A recording operation command signal is issued to the playback device 5, and the contents of the temporary audio memory 43 corresponding to the period from the silent position before the recording request to the silent position at or after the recording request are selectively read out and externally read out. It is composed of a recording transfer control means 47 for transferring the data to.

Note that the audio recording/playback device 5 has a high-speed recording mode in which recording is performed at a speed higher than the speed at which raw audio is recorded.The audio information is recorded from the audio recording control value w4 to the audio recording/playback device 5. , recording is performed in the high-speed recording mode.

FIG. 2 is a block diagram showing a more specific configuration of the audio recording control device shown in FIG. 1, and 1 to 5 in FIG. 2 are the same as those in FIG. 1. 6 is an A/D conversion circuit (corresponding to the recording circuit 41 in Figure 1) that converts the audio signal of the audio device l into a digital signal suitable for recording at each sampling time; It includes a hold circuit and a low-pass filter for preventing aliasing.

7 is a control circuit, 8 is a temporary voice memo 1J43 in FIG.
The control circuit 7 includes a microcomputer and a program memory for operating the microcomputer, receives digital data from the A/D conversion circuit 6, and records this in the data memory 8. The control circuit 7 also reads digital data recorded in the data memory 8 and supplies it to the D/A conversion circuit 9.

Further, the data memory 8 is composed of a RAM (random access memory), and the control circuit 7 is connected to an address bus 8.
1 and a data bus 82.

The D/A conversion circuit 9 includes a data latch and a smoothing low-pass filter in addition to the D/A converter, and converts the digital signal from the control circuit 7 into an analog audio signal. The output is sent to a tape recorder (voice recording/playback device fif) 5. This tape recorder 5
performs a recording operation in response to a control command signal 51, which is given from the control circuit 7. 1
0 is a silence detection circuit (corresponding to the silence detection means 44 in Fig. 1)
Then, a silent portion is detected from the audio signal output from the audio device 1, and a detection signal 101 is sent to the control circuit 7. This determination of silence is made by determining whether the audio level is lower than a certain threshold (^), and when the silence time becomes longer than a predetermined time, a silence detection signal 101 is output.

11 is a silent position memory (corresponding to 46 in Figure 1);
It is configured with a RAM having a predetermined storage capacity, and when the audio signal output from the audio device 1 is recorded as digital data in the audio data memory 8 through the A/D conversion circuit 6 and the control circuit 7, the detection from the silence detection circuit 10 is performed. signal lot
This is a memory for storing address information in the audio data memory 8 when the sound is outputted as a silent position.

This silent position memory 11 is connected to a control circuit 7 and an address bus 1.
11 and a data bus 112.

Next, the operation will be explained. In this embodiment, unlike conventional recording devices, the audio signal from the audio device l is transferred to the audio data memory 8 regardless of the presence or absence of a recording request command.
Audio information up to a certain time past is constantly updated and stored in the audio data memory 8, excluding silent parts to the extent that the storage space allows. It is also characterized by recording.

The above-mentioned operation will be explained in more detail below using the flowchart shown in FIG.

Assuming that the audio recording control device is now powered on, if there is no recording request command, the audio information recording operation shown in the left half of the flowchart of FIG. 3, ie, steps 201 to 212, is performed. In this state, the data writing operation of the audio data memory 8 inside the audio recording control device is continuously performed every write sampling time Twrite. That is, step 20
If it is determined in step 1 that there is no recording request command from the outside, steps 202 and 203 determine the sampling time (the sampling time is Twrite for writing to the audio data memory 8 inside the control device and ``read'' for reading 2
There are several types of synchronization operations. Next, when the A/D conversion command 61 is sent from the control circuit 7 to the A/T) conversion circuit 6 (step 204), the A/D conversion circuit 6 converts the audio analog signal at this point in time according to this command. Convert to digital signal. This conversion time must be within l sampling time.

When this A/D conversion is completed, the A1) conversion circuit 6 outputs an A/D conversion end signal 62 to the control circuit 7.

The control circuit 7 detects this symbol 62 (step 2
05), if this signal can be detected, it becomes possible to read digital data (step 206). This digital data is held as output data of the A/D conversion circuit 6 until a new A/D conversion command 61 is given.

Next, the control circuit 7 detects the presence or absence of the output signal 1Ol of the silence detection circuit IO (step 207), and the silence detection signal 101
If not, the process advances to Stella 7'' 208a, and in step 208a, the recording address of the audio data memory, that is, the address on the audio data memory 8 where data was written during the previous sampling, is incremented by 1. The digital output of the A/D conversion circuit 6 is written to the memory specified by the recording address on the audio data memory 8 (step 208b).At this time, the original content written in the memory is erased. Put it away.

On the other hand, if it is detected in step 207 that the silence detection signal 201 is output, the process proceeds to step 209, where it is determined whether the silence detection signal was output during the previous sampling, and If there is a sound, the process advances to step 210 and the recording address at this time is recorded in the silent position memory 11.

FIG. 4 shows the above operation using a time chart and a memory map. 4) Fig. 3) is an example of a time-varying waveform of the audio signal output from the sound system W1 in Fig. 1, and Fig. 4(b) shows an example of the time-varying waveform of the audio signal outputted from the sound system W1 in Fig. 1. The same figure shows signal waveforms of utterances and silences distinguished by whether they are larger or smaller (C1 is the output signal of the silence detection circuit 10, and when the silence state continues for a predetermined time, a high level detection signal is output. In the same figure (dl is a memory map diagram showing the audio data memory 8, digital data corresponding to the audio signal when the silence detection signal is in the low state is stored in the time and address correspondence relationship as shown in the figure). FIG. 8(8) shows a memory map of the silent position memory 11, in which addresses corresponding to the hatched areas on +dl in the figure are sequentially written as the silent positions described above.

Of course, both the silent position memory and the audio data memory have a limited memory capacity, but in this embodiment, once the contents have been written to the memory at the final address by the silent position recording means 45 and the audio information recording means 42,
It is controlled to function as a circular address type memory that returns to the initial address and writes new data while erasing old data.

Flowchart 1 in Figure 3 Steno/'211,21
2 shows that the above operation is performed on the audio data memory, but the same process is performed on the silent position memory in step 210 (omitted in the flow chart).

When steps 211 and 212 are completed, the process returns to the first step 201.

Next, in step 201, when there is a recording request th instruction, the process advances to step 301, where the recording flag in program Z is sent (step 301), and in step 302, a cheap recording start command is issued. 51 is output. Based on this command, the tape recorder 5 shifts to a recording state. In step 303, according to the contents of the current recording request command, - the start address of the audio data memory where the data to be recorded on the tape recorder 5, which is read out from the audio data memory 8 based on the logic of the control circuit 7, is stored; and the final address is set.

Here, item 112 will be explained using the example of FIG.

When a recording request command is generated at the timing shown by the arrow C1-L in Figure 4, the first address is silent (iy
The contents of the address M3 of the installed memory 11 x 3 addresses are set, and the contents of the address M4 x 4 address are set as the R end address. If the content of the recording request trr instruction is a request to record two or more active parts before the command is issued, each time address Xi or address X2 is set as the first address. Become. As in the example in Figure 4, ×2
If the distance between the address and the x3 address is quite short, it is determined that this part is not a meaningful voiced part, and the x1 address is set instead of the x2 address.

When the above operation is completed in step 303, step 2
Proceed to step 02 and wait for the predetermined sampling time to arrive.
In step 203, the operation at that sampling time is determined. In the case of the operation of writing to the audio data memory 8, the process advances to step 204, and the subsequent operations are as described above. If it is the operation timing for reading from the audio data memory 8, the process advances to step 310, and if the recording flag is not set, the process returns to step 201 and returns to the initial state.

If the recording flag is set, step 301
The process advances to 315 to read out the audio data memory 8 (recording transfer control operation). step 311,
At 312, the digital data at the address whose address is increased by 1 every sampling time T reed is read out.
In step 313, the D/A conversion output is output from the D/A conversion circuit 9 to the tape recorder 5. Step 31
4 is performed every sampling time TREAD -1
- In the step of determining whether or not to end the read operation described above, when the final read address set in step 303 and the read address currently in progress match, the recording flag set by software in step 301 is set. Reset and proceed to step 2+1.

In this way, in this embodiment, the silent part of the audio signal of the acoustic snowmaking gutter is detected and the silent position is recorded, and the audio information is recorded only in the sound part. Since the content from the silent position before the listening request to the silent position after the listening request or after the listening request is transferred to an external tape recorder, it is easy to record the true listening content and listen to only the PL. Selective recording can be performed with only simple operations, eliminating wasted tape and eliminating recording errors during selective recording.

〔Effect of the invention〕

As described above, the audio recording control device according to the present invention is provided with a temporary audio data memory that continuously records audio signals starting from the past content for a predetermined period of time, and at the same time detects silent parts of audio. A means is provided for storing the silent position on the recorded audio data memory, and ``In accordance with the listener's recording request, 1. The silent area that appears before the recording request on the temporary audio memory and after that'' is provided. Since it is configured to selectively read and output silent parts to a playable recording medium, the listener can check whether the content uttered in the voice is the content they want to record while listening to it or after listening to it. This has the effect of making it possible to record only what you truly want to record with simple operations.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an audio recording control device according to an embodiment of the present invention, FIG. 2 is a block diagram showing a specific configuration of the device shown in FIG. 1, and FIG. 3 is a block diagram of the device shown in FIG. 2. FIG. 4 is a flow chart diagram showing the operation, and FIG. 4 is a tie chart and a memory map diagram for explaining the operation. In the figure, 1 is an audio device, 2 is an amplifier, 3 is a speaker, 5 is a tape recorder (audio recording control device), 4 is an audio recording control device, 41 is a recording circuit, and 42 is an audio information recording device.
1 stage, 43 temporary audio memory, 8 audio data memory, 44 silence detection means, 10 silence detection circuit, 45 1 stage silence position record, 4G, 11 silence position memory, 47 record 6 transfer control Means 7 is a control circuit. Figure 1

Claims (4)

[Claims] (1) A recording circuit that converts an audio signal output from an audio device into a signal suitable for recording; a temporary audio memory having a predetermined storage capacity for recording the signal from the recording circuit; and the audio signal. a silent position memory for storing a silent position on the temporary audio memory, and a silent position of the audio signal according to a detection signal from the silent detecting means; a silent position recording means for recording in a memory; an audio information recording means for recording a signal from the recording circuit in the temporary audio memory while erasing old recorded content after a predetermined period of time; and a recording request from a listener. and recording transfer control means for selectively reading and transmitting the contents of the temporary audio memory from a silent position before the recording request to a silent position after the recording request or thereafter to the outside. Audio recording control device. (2) The recording transfer control means outputs a recording operation command signal to record the contents of the audio memory to an external playable recording medium when selectively reading the temporary audio memory. An audio recording control device according to claim 1, characterized in that: (3) The audio recording control device according to claim 1 or 2, wherein only a signal of a sound portion of the audio signal is recorded in the temporary audio memory. (4) The audio recording control device according to claim 3, wherein the silent position memory records a starting address of each voiced portion recorded in the temporary audio memory.