JPH07296506A - Sound recording/reproducing device - Google Patents

Abstract

PURPOSE:To review again instantaneous program searching of a sound start end sound at the time of repeat reproduction and only a repeat reproduced section, and to subject the sound to be repeat-reproduced to processing to make it easy to listen through a signal processing. CONSTITUTION:When a repeat request is generated, a sound reproducing control means 16 stops a magnetic tape reproducing means 11, and gives information in the section of a repeat reproduced sound signal to a temporary data storage means 12 based on positional information of a sound start end stored in a sound start end temporary storage means 14, and performs the control to reproduce the section. Simultaneously, the sound signal of the repeat section reproduced from the temporary data storage means 12 is transferred to a data storage means 13 to be stored. When a replay request is generated, the sound reproducing control means 16 performs the control to reproduce the sound signal recorded in the data storage means 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio recording / reproducing apparatus for reproducing an audio signal efficiently or easily.

[0002]

2. Description of the Related Art Conventionally, an audio recording / reproducing apparatus capable of repeat reproduction has been used for the purpose of repeatedly listening to an audio signal recorded on a magnetic tape medium in language learning or the like.

A conventional audio recording / reproducing apparatus as described above will be described below with reference to the drawings.

FIG. 4 shows the structure of a conventional audio recording / reproducing apparatus. In FIG. 4, 41 is a magnetic tape recording / reproducing means, 42 is a voice section detecting means, 43 is a voice start end temporary storing means, and 44 is a voice reproducing control means.

The operation of the audio recording / reproducing apparatus configured as described above will be described below. First, the magnetic tape recording / reproducing means 41 reproduces an audio signal for a desired reproducing section by the control signal from the audio reproduction controlling means 44. Further, the voice section detection means 42 detects the start of the voice section of the reproduced voice signal, and the voice start end temporary storage means 43 temporarily stores the information of the latest voice start end detected by the voice section detection means 42. is doing.

When a repeat request is issued, the voice reproduction control means 44 rewinds the magnetic tape medium once based on the latest voice start end information stored in the voice start end temporary storage means 43, and then repeats the repeat section. Start playing.

[0007]

However, in the above-mentioned structure, since it is necessary to mechanically rewind the magnetic tape in response to the repeat request, it takes time to find the repeat section. , The accuracy of the section to be reproduced was not enough. And when you review again,
If a user tries to extract and listen only to a voice section for which a plurality of repeat requests have been made, a great amount of cue time is required and there is a problem that the efficiency is not good. On the other hand, since the voice segment that is difficult to listen to is output as it is again, there is no improvement in terms of ease of listening even after relistening.

In view of the above-mentioned problems, the present invention makes it possible to immediately reproduce a desired repeat section, and to enable only the repeat section to be continuously collected and immediately re-listened to. On the other hand, it is an object of the present invention to provide a voice recording / reproducing device that allows a user to hear a voice that is easy to hear.

[0009]

In order to achieve this object, a voice recording / reproducing apparatus of the present invention comprises a temporary data storage means for always storing the latest voice data for a predetermined time length,
A voice start end temporary storage means for storing information on the start end of a characteristic section of the voice data, a data storage means for storing only the voice data reproduced by repeat reproduction, and a signal processing means for performing a predetermined signal processing on the voice data are provided. It has been configured.

[0010]

With this configuration, when the repeat request is issued, the voice data to be read from the temporary data storage means is determined based on the information about the most recent voice start edge possessed by the voice start edge temporary storage means. Repeat reproduction can be performed, and at the same time, voice data of the repeat section can be stored in the data storage means. As a result, the repeat section can be immediately heard when the repeat request is generated, and only the repeat section that has already been stored can be reproduced when the replay request is generated.

Further, the speed conversion processing means is used as the signal processing means to reproduce the voice slowly so that the voice can be easily understood, and the formant emphasis processing is performed to improve the clarity of the vowel part. The consonant emphasis means can improve the clarity of consonants. Alternatively, by using the noise suppression processing means, it is possible to suppress noise components included in the repeat section and obtain a voice that is easy to hear.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an audio recording / reproducing apparatus according to the first embodiment of the present invention. In FIG. 1, 11 is a magnetic tape reproducing means, 12 is a temporary data storage means, 13 is a data storage means, 14 is a voice start end temporary storage means, 15 is a voice section detection means, 16 is a voice reproduction control means, and 17 is an input selection. Means, 18 is a speed conversion processing means.

The operation will be described below. In the audio reproducing device of the present embodiment, in addition to the mode in which the audio signal is normally reproduced, the repeat reproducing mode in which a specific section specified by the user is repeatedly reproduced, and only the section in which the repeat reproduction is performed from the beginning to the end again. It has a replay reproduction mode for reproduction.

The operation in the normal reproduction mode will be described first.
First, the magnetic tape reproducing means 11 reads out and reproduces the audio signal recorded on the magnetic tape under the control of the audio reproduction controlling means 16. The temporary data storage means 12 is
It has a circulating memory configuration having a storage capacity large enough to record meaningful breaks of an audio signal, and continuously records the audio signal output by the magnetic tape reproducing means 11 during operation. Audio data for a predetermined length of time from the present to the past is always saved. The voice section detecting means 15 obtains position information on the temporary data storage means at the start and end of the voice section of the reproduced voice signal. Then, the output result is input to the voice start end temporary storage means 14 and the start end information / end end information of the newest voice section is stored. The audio reproduction control means 16 controls the start / stop of the magnetic tape reproduction means 11 and outputs a control signal for selecting an audio signal from the magnetic tape reproduction means 11 as an input of the input selection means 17. The conversion ratio of the speed conversion processing means 18 is set to 1.0 (unprocessed).

When a repeat request is issued, the audio reproduction control means 16 stops the magnetic tape reproducing means 11 and repeats the audio reproduction based on the position information of the audio start end stored in the audio start end temporary storage means 14. The information of the section of the signal is given to the temporary data storage means 12 to control the reproduction of the section. Further, the input of the input selection means 17 is switched to the audio signal from the temporary data storage means 12, and this audio signal is output to the speed conversion processing means 18. At this time, the speed ratio of the speed conversion processing means 18 is set to a slow speed of about 0.8 at the normal time, speed conversion is performed, and the sound is output as an audio output. At the same time, the voice signal in the repeat section reproduced from the temporary data storage means 12 is transferred to and stored in the data storage means 13.

When a replay request is issued, the audio reproduction control means 16 controls the reproduction of the audio signal recorded in the data storage means 13. Also, the input of the input selection means 17 is switched to the audio signal from the data storage means 13,
This voice signal is output to the speed conversion processing means 18. At this time, the speed ratio of the speed conversion processing means 18 is 0.8 at the normal time.
It is set to a slow speed, the speed is converted, and it is output as an audio output.

As described above, according to the present embodiment, the temporary data storage means for storing the information of the voice start end in advance and for immediately reproducing the voice section to be repeatedly reproduced based on the information is provided. This makes it possible to instantly perform repeat reproduction when a repeat request is generated. Further, when the repeat play request is generated, only the audio signal thereof is recorded in the data storage means when the repeat reproduction is executed, so that only the reproduced repeat audio signal can be easily extracted and reproduced. Further, the processing for changing the reproduction speed by the speed conversion processing means makes it possible to easily understand a voice signal which is difficult to hear.

In the present embodiment, an example has been described in which the speed conversion processing means changes the reproduction speed to facilitate listening, but the formant emphasis processing is performed to improve the clarity of the vowel portion. It is also possible to make listening easier.

The second embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram of an audio recording / reproducing apparatus according to the second embodiment of the present invention. In FIG. 2, 11 is a magnetic tape reproducing means, 12
Is a temporary data storage means, 13 is a data storage means, 14 is a voice start end temporary storage means, and 17 is an input selection means, which are the same as those in the first embodiment. Reference numeral 21 is a phoneme detection means, 22 is a voice reproduction control means, and 23 is a consonant emphasis processing means.

The operation will be described below. Also in the audio reproducing device of the present embodiment, as in the first embodiment,
In addition to the normal playback mode of the audio signal, it has a repeat playback mode to repeat playback of a specific section specified by the user, and a replay playback mode to play only the repeat playback section from beginning to end again. There is.

The operation in the normal reproduction mode will be described first.
First, the magnetic tape reproducing means 11 reads out and reproduces the audio signal recorded on the magnetic tape under the control of the audio reproduction controlling means 22. The temporary data storage means 12 is
It has a circulating memory configuration having a storage capacity large enough to record meaningful breaks of an audio signal, and continuously records the audio signal output by the magnetic tape reproducing means 11 during operation. Audio data for a predetermined length of time from the present to the past is always saved. Phoneme detecting means 21
Identifies the type of phoneme contained in the read voice signal. From the result of this phoneme detection, the position information on the temporary data storage means at the beginning and end of the voice section is obtained. Then, the output result is input to the voice start end temporary storage means 14 and the start end information / end end information of the newest voice section is stored. The audio reproduction control means 22 controls the start / stop of the magnetic tape reproduction means 11 and outputs a control signal for selecting an audio signal from the magnetic tape reproduction means 11 as an input to the input selection means 17.

When a repeat request is issued, the audio reproduction control means 22 stops the magnetic tape reproducing means 11 and repeats the audio reproduction based on the position information of the audio start end stored in the audio start end temporary storage means 14. The information of the section of the signal is given to the temporary data storage means 12 to control the reproduction of the section. Further, the input of the input selection means 17 is switched to the audio signal from the temporary data storage means 12, and the consonant emphasis processing means 23 performs processing for emphasizing consonants. At the same time, the voice signal in the repeat section reproduced from the temporary data storage means 12 is transferred to and stored in the data storage means 13.

When a replay request is issued, the audio reproduction control means 22 controls the reproduction of the audio signal recorded in the data storage means 13. Also, the input of the input selection means 17 is switched to the audio signal from the data storage means 13,
The consonant emphasis processing means 23 performs processing for emphasizing consonants.

As described above, according to this embodiment, the temporary data storage means 12 is provided which can store the information of the voice start end in advance and can immediately reproduce the voice section to be repeatedly reproduced based on the information. As a result, it is possible to instantly perform repeat reproduction when a repeat request is generated. Further, when the repeat play request is generated, only the audio signal thereof is recorded in the data storage means 13 when the repeat reproduction is executed, so that only the reproduced repeat audio signal can be easily extracted and reproduced. Furthermore, the process of emphasizing the consonants by the consonant emphasizing processing unit 23 makes it possible to easily understand a voice signal that was difficult to hear.

The third embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a block diagram of an audio recording / reproducing apparatus according to the third embodiment of the present invention. In FIG. 3, 11 is a magnetic tape reproducing means, 12
Is a temporary data storage means, 13 is a data storage means, 14 is a voice start end temporary storage means, 15 is a voice section detection means, 17
Is an input selection means, and performs the same operation as in the first embodiment. 31 is noise analysis means, 32 is voice reproduction control means, 3
3 is a noise suppressing means.

The operation will be described below. In the audio reproducing apparatus according to the present embodiment, similar to the first and second embodiments described above, in addition to the mode for normally reproducing the audio signal, the repeat reproduction for repeating the specific section designated by the user. It has a mode and a replay reproduction mode in which only the repeat-reproduced section is reproduced again from the beginning to the end.

The operation in the normal reproduction mode will be described first.
First, the magnetic tape reproducing means 11 reads out and reproduces the audio signal recorded on the magnetic tape under the control of the audio reproduction controlling means 32. The temporary data storage means 12 is
It has a circulating memory configuration having a storage capacity large enough to record meaningful breaks of an audio signal, and continuously records the audio signal output by the magnetic tape reproducing means 11 during operation. Audio data for a predetermined length of time from the present to the past is always saved. The voice section detecting means 15 obtains position information on the temporary data storage means at the start and end of the voice section of the reproduced voice signal. The noise analysis means 31 analyzes the noise component of the voice section. Then, the analysis results of the voice section detection means 15 and the noise analysis means 31 are input to the voice start edge temporary storage means 14, and the start edge information / end information of the newest voice zone is stored.
The audio reproduction control means 32 controls the start / stop of the magnetic tape reproduction means 11 and outputs a control signal for selecting the audio signal from the magnetic tape reproduction means 11 as an input of the input selection means 17.

When a repeat request is generated, the audio reproduction control means 32 stops the magnetic tape reproducing means 11 and repeats the audio reproduction based on the position information of the audio start end stored in the audio start end temporary storage means 14. The information of the section of the signal is given to the temporary data storage means 12 to control the reproduction of the section. Further, the input of the input selection means 17 is switched to the audio signal from the temporary data storage means 12, and the noise information of the audio start end stored in the audio start end temporary storage means 14 is given to the noise suppression processing means 33 to reproduce the reproduced sound. Performs control to suppress noise.

At the same time, the voice signal in the repeat section reproduced from the temporary data storage means 12 is transferred to and stored in the data storage means 13.

When a replay request is issued, the audio reproduction control means 32 controls the reproduction of the audio signal recorded in the data storage means 13. Also, the input of the input selection means 17 is switched to the audio signal from the data storage means 13,
This audio signal is output to the noise suppression processing means 33, and the audio subjected to the noise suppression processing is output.

As described above, according to the present embodiment, the temporary data storage means 12 is provided which can store the information of the voice start end in advance and can immediately reproduce the voice section to be repeatedly reproduced based on the information. As a result, it is possible to instantly perform repeat reproduction when a repeat request is generated. Further, when the repeat play request is generated, only the audio signal thereof is recorded in the data storage means 13 when the repeat reproduction is executed, so that only the reproduced repeat audio signal can be easily extracted and reproduced. Further, the processing for suppressing the background noise by the noise suppression processing means 33 makes it possible to easily understand a voice signal which is difficult to hear.

[0033]

As described above, according to the audio reproducing apparatus of the present invention, the temporary input data is constantly recorded by the temporary data storing means for always storing the latest audio data for the predetermined time length, and at the same time, the audio signal is reproduced. By storing the information of the start end of the characteristic section of the voice data in the temporary data storage means by the start end temporary storage means, it is possible to instantly perform the repeat reproduction from the voice start end when the repeat request is generated. Since only the repeat section can be continuously reproduced by providing the data storage means for storing only the voice data that has been repeatedly reproduced, it can be used for language learning and review of important parts. Further, by providing the signal processing means for performing the predetermined signal processing on the voice data, the voice section of the consonant part or the vowel part is emphasized for the voice signal of the part which is difficult to listen and the repeat reproduction is made, and the listening is further improved. It is possible to realize an excellent audio recording / reproducing apparatus that can make the sound in the repeat section easier to hear by facilitating or suppressing the background noise.

[Brief description of drawings]

FIG. 1 is a block diagram of an audio recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of an audio recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 3 is a block diagram of an audio recording / reproducing apparatus according to a third embodiment of the present invention.

FIG. 4 is a block diagram of a conventional audio recording / reproducing device.

[Explanation of symbols]

 11 magnetic tape reproducing means 12 temporary data storing means 13 data storing means 14 voice start end temporary storing means 15 voice section detecting means 16 voice reproducing control means 17 input selecting means 18 speed conversion processing means 21 phoneme detecting means 22 voice reproducing controlling means 23 consonants Enhancement processing means 31 Noise analysis means 32 Voice reproduction control means 33 Noise suppression processing means

Claims (5)

[Claims] 1. A magnetic tape recording / reproducing means for recording / reproducing an audio signal, a temporary data storing means for receiving an output signal of the magnetic tape recording / reproducing means and storing audio data of a predetermined time length, Analytical signal processing means for performing a predetermined analysis or signal processing on the input voice of the data storage means, and information on the start of a characteristic section of the stored voice data based on the output result of the analytical signal processing means. Audio start end temporary storage means, data storage means for storing audio data to be repeatedly played back from the temporary data storage means when a repeat request is generated, the magnetic tape playback means, temporary data storage means or data storage Input selection means for selecting audio data to be output from the signal source of the means, and a predetermined signal for the audio data selected by the input selection means Signal processing means for performing processing, and when the repeat request and the replay request are generated, selects the audio data to be reproduced based on the information held in the audio start edge temporary storage means, and the signal processing means has predetermined signal processing parameters. And a voice recording / reproducing control unit for giving the information of 1., wherein the voice data stored in the data storing unit is immediately processed and reproduced by desired signal processing when a replay request is made. 2. A voice section is obtained by using a voice section detecting means as the analysis signal processing means, a time axis expansion / contraction processing is performed by using a speed conversion processing means as the signal processing means, and a predetermined voice is produced at the time of repeat reproduction or replay reproduction. The audio recording / reproducing apparatus according to claim 1, wherein the audio recording / reproducing device outputs a speed-converted audio in which a reproduction speed is changed with respect to a section. 3. A voice section is obtained by using a voice section detecting means as the analysis signal processing means, and a formant emphasis processing means is used as the signal processing means to emphasize the formant for a predetermined voice section at the time of repeat reproduction or replay reproduction. The audio recording / reproducing apparatus according to claim 1, wherein the audio recording / reproducing apparatus outputs a sound that is easy to hear. 4. A consonant part in a voice section is obtained by using a phoneme detecting means as the analysis signal processing means, and a consonant emphasis processing means is used as the signal processing means for a predetermined consonant section at the time of repeat reproduction or replay reproduction. 2. A sound which enhances the consonant and makes it easier to hear is output.
The audio recording and reproducing apparatus described. 5. A voice section detecting means and a noise analyzing means are used as the analysis signal processing means to analyze the noise components in the voice section range and the non-voice section, and a noise suppression processing means is used as the signal processing means. 2. A sound which makes it easy to listen to is output by suppressing noise superimposed on a predetermined sound section at the time of repeat or replay reproduction.
The audio recording and reproducing apparatus described.