JP2006295669A - Sound reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound reproducing apparatus with which reproduction is performed without a user failing to listen to sound data even when a loud sound occurs in the surroundings when sound data of learning of foreign languages, etc. is reproduced using the sound reproducing apparatus. <P>SOLUTION: The sound reproducing apparatus has a storage part 11 which stores the sound data, a microphone 13 which collects surrounding sound, a decision part 14 which compares a predetermined threshold Th1 with a level of the surrounding sound output from the microphone and outputs a comparison result, a control part 15 which controls reproduction, a reproduction part 12 which reproduces the sound data in the storage part 11 by control of the control part 15 and a headphone 16 which performs sound output, stops the reproduction when the surrounding sound is loud and restarts the reproduction when the surrounding sound becomes soft. In addition, the reproduction may be restarted by rewinding the sound a little in the case of restart. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an audio reproduction device, and more particularly to an audio reproduction device used for listening to a foreign language learning that can be controlled based on an external audio signal obtained from a microphone, such as a CD player, an MP3 player, a mobile phone, and the like. Regarding telephones.

  Many people are learning to listen in a foreign language using an audio playback device such as a portable music player (CD player, MP3 player, mobile phone, etc.) on a train or the like. For example, in a train, a portable music player user listens to sound using headphones, and is always used in a state where a large and small noise exists outside. However, it is often the case that small headphones with a focus on portability are used, and it is not possible to sufficiently block external noise. If loud sounds are generated outside, listening learning is hindered. Sometimes. Some users respond by setting the volume extremely high to prevent learning from being hindered by noise, but when external noise enters, it naturally leaks outside, and loud sounds leak around. Annoying. It is also not a desirable solution because it can also damage the person's ears.

Therefore, as a conventional portable stereo device, it has an earphone or headphone that outputs voice and music, and a microphone for sound collection, and white steady sound as noise based on an audio signal input through the microphone, By generating and superimposing the estimated sound that cancels it, it is easy to hear by canceling stationary noise, and when a colored sound such as an alarm sound is input, the colored sound is judged and output without canceling, There has been proposed a portable music playback device that can easily hear colored sounds such as alarm sounds that are easy to hear stationary noise (see, for example, Patent Document 1).
JP-A-5-145985 (page 6, FIG. 1)

  However, in the above-described conventional configuration, steady noise around the sound reproduction can be suppressed, but since a colored sound such as an alarm sound is not canceled, it is possible to connect with other trains while riding on the train. If a loud sound such as a passing sound is heard for a short time, the loud sound cannot be canceled and can be heard. In the case of music, even if a loud sound such as an alarm sound or a passing sound of a train enters in a short time while listening, it is advantageous in terms of ease of listening to reduce steady noise, Even if you miss it for a short time, there is no problem. However, when listening as learning, if a loud sound such as an alarm sound or passing sound enters and an inaudible part is created in the middle of the sentence, it becomes difficult to understand and troubles learning was there.

  In order to solve the above-described conventional problems, the audio reproduction device of the present invention compares a storage unit that stores audio data, a microphone that collects sound, a signal level of sound output from the microphone, and a predetermined threshold value. A determination unit that outputs the result, and a reproduction unit that reproduces the audio data based on the control of the control unit, and pauses and resumes reproduction of the audio data based on the comparison result output from the determination unit. The configuration is to be controlled.

  With this configuration, the sound reproducing device collects surrounding sounds with a microphone during sound data reproduction such as listening learning of a foreign language stored in the storage unit, and the level of the surrounding sounds is equal to or greater than a predetermined threshold. When the result is output from the determination unit, the audio data is paused, and when the surrounding sound level is equal to or lower than a predetermined threshold, the pause is canceled and playback can be started. Therefore, while the sound data is being reproduced, the sound data is paused while sound around the predetermined threshold is generated around the user, and when the surrounding sound falls below the threshold, the reproduction is resumed. Even if a temporary loud sound is generated in the surrounding area, it is possible to eliminate an inaudible portion of the audio data being reproduced.

  The audio reproduction device of the present invention compares the storage unit for storing audio data, the microphone to collect sound, the sound level output from the microphone with a predetermined first threshold, and outputs the result. A determination unit, a second determination unit that compares the signal level of the sound output from the microphone with a predetermined second threshold value and outputs the result, a control unit that controls reproduction of audio data, and a storage unit A reproduction unit that reproduces the audio data stored in the control unit based on the control of the control unit, and based on the comparison result output from the first determination unit, the audio data is paused and output from the second determination unit. Based on the comparison result, the restart of the reproduction of the audio data is controlled.

  With this configuration, the sound reproducing device collects surrounding sounds with the microphone during reproduction of sound data such as foreign language listening learning stored in the storage unit, and the level of the surrounding sound is determined in advance. Audio data is paused when a result equal to or higher than the threshold is output from the determination unit, and when the surrounding sound level falls below a predetermined second threshold, the pause is canceled and playback starts. can do. Therefore, during the reproduction of the audio data, the sound data is paused while sound around the first threshold value is generated in the surroundings, and the surrounding sound falls below the predetermined second threshold value. By resuming the playback, the user can eliminate a portion that cannot be heard even if a loud sound is generated in the surroundings. Also, even when the surrounding sound increases or decreases at a level close to the first threshold value, the reproduction and the pause are continuously performed by adjusting the difference between the first threshold value and the second threshold value. The unpleasant state such as can be eliminated.

  In addition, the audio reproduction device of the present invention compares the sound level output from the storage unit that stores the audio data, the microphone that collects sound, the sound output from the microphone, and a predetermined first threshold value, and outputs the result. A first determination unit, a second determination unit that compares the signal level of the sound output from the microphone with a predetermined second threshold value and outputs the result, a control unit that controls reproduction of audio data, and a storage A reproduction unit that reproduces the audio data stored in the unit based on the control of the control unit, and pauses reproduction of the audio data based on the comparison result output from the first determination unit; The audio data reproduction is resumed after the audio data reproduction position is returned to the previous position for a predetermined time based on the comparison result output from the determination unit.

  With this configuration, the sound reproducing device collects surrounding sounds with a microphone during reproduction of sound data such as foreign language listening learning stored in the storage unit, and the level of the surrounding sounds is a first threshold value determined in advance. If the determination unit determines that the above has occurred, the audio data is paused. If the surrounding sound level falls below a predetermined second threshold, the audio data is moved forward by a predetermined time. If you stop by a loud sound generated in the surroundings, you will not miss the audio data, and even if you stop in the middle of sounding, it will be played back from the previous position. Playback can be resumed easily.

  The audio reproduction device of the present invention compares the sound level output from the storage unit that stores the audio data, the microphone that collects the sound, and the predetermined first threshold value, and outputs the result. A first determination unit, a second determination unit that compares a sound level output from the microphone with a predetermined second threshold and outputs a result, a control unit that controls reproduction of audio data, and a storage unit A reproduction unit that reproduces the audio data stored in the control unit based on the control of the control unit, and a silence detection unit that detects a silence state in the reproduction unit, and the comparison result output from the first determination unit Based on the comparison result output from the second determination unit and the output result of the silence detection unit when paused, the playback position of the audio data for a predetermined time is The audio data reproduction is resumed after returning to step 1.

  With this configuration, the sound reproducing device collects surrounding sounds with a microphone during reproduction of sound data such as foreign language listening learning stored in the storage unit, and the level of the surrounding sounds is a first threshold value determined in advance. If it is determined from the output result of the determination unit that the above is true, the audio data is paused, and if the surrounding sound level is equal to or lower than a predetermined second threshold value, silence is detected during the pause. If the silent state is a silent period that is longer than the predetermined time according to the output result of the part, the audio data is restarted from the position where it was paused. Reproduction can be performed from a position returned by a predetermined time. As a result, resumption of playback after being paused by a loud sound generated in the surroundings is performed without returning the playback position if the audio data is in a silent section when paused, and in advance if not in a silent section. Since playback is performed from a position returned before a predetermined time, it is easy to hear and the playback position can be resumed without wastefully returning the playback position.

  The audio reproduction device of the present invention compares the sound level output from the storage unit that stores the audio data, the microphone that collects the sound, and the predetermined first threshold value, and outputs the result. A first determination unit, a second determination unit that compares a sound level output from the microphone with a predetermined second threshold and outputs a result, a control unit that controls reproduction of audio data, and a storage unit A reproduction unit that reproduces the audio data stored in the control unit based on the control of the control unit, and a silence detection unit that detects a silence state in the reproduction unit, and the comparison result output from the first determination unit Based on this, the playback of the audio data is resumed after the pause of the playback of the audio data and the return to the position of the previous silent section based on the comparison result output from the second determination unit.

  With this configuration, the ambient sound is collected by the microphone during the reproduction of the speech data such as foreign language listening learning stored in the storage unit, and the ambient sound level is equal to or higher than a predetermined first threshold. When it is found from the result of the determination unit, the audio data is paused. When the surrounding sound level is equal to or lower than a predetermined second threshold, the audio data is silenced in the immediately preceding predetermined time width. By returning the playback position to the previous silent section and restarting it, audio data will not be missed even when paused by a loud sound generated in the surroundings, and it will be played from the previous silent position. Playback can be resumed in an easy-to-listen state.

  In addition, an audio playback device of the present invention includes a storage unit that stores audio data, a mark set at an arbitrary playback position of the audio data, and additional data including data associated with the address of the audio data, a microphone that collects sound, A first determination unit that compares a sound level output from the microphone with a predetermined first threshold value and outputs a result; a sound level output from the microphone and a predetermined second threshold value; A second determination unit that compares and outputs the result; a control unit that controls reproduction of audio data; and a reproduction unit that reproduces audio data stored in the storage unit based on control of the control unit; Based on the comparison result output from the first determination unit, the reproduction of the audio data is paused, and based on the comparison result output from the second determination unit, the reproduction position of the audio data is set to the previous mark position. Resume playback after returning to The formed.

  With this configuration, the ambient sound is collected by the microphone during the reproduction of the speech data such as foreign language listening learning stored in the storage unit, and the ambient sound level is equal to or higher than a predetermined first threshold. If it is found from the comparison result of the determination unit, the audio data is temporarily stopped. If the surrounding sound level is equal to or lower than a predetermined second threshold value, the audio data is placed at a predetermined mark position immediately before. By resuming the playback position and restarting it, audio data will not be missed even when paused by a loud sound generated in the surroundings, and it will be played from the previous set mark position, making it easy to hear Playback can be resumed.

  According to the sound reproducing device of the present invention, even if a loud sound is generated in the surroundings during the reproduction of the sound data such as foreign language listening learning, the sound is collected while the surrounding sound is collected by the microphone. By temporarily stopping the playback and resuming the playback after the loud sound disappears, it is possible to perform the playback without any part that the user misses in the middle.

  In addition, when playback is stopped in the middle of a sentence by returning to a predetermined time, the previous silent section or the position of the previous mark, and then restarting playback, the playback resumes from the middle of the sound data. It is possible to avoid things that are difficult to hear.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode audio reproducing apparatus for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a block diagram of an audio reproducing apparatus according to Embodiment 1 of the present invention. In FIG. 1, a storage unit 11 that stores voice data that is a learning material such as foreign language listening learning, a microphone 13 that collects ambient sounds, a predetermined threshold value Th <b> 1, and a level of ambient sounds from the microphone 13 The control unit 15 for controlling the reproduction of the audio data, and starting or pausing the reproduction of the audio data stored in the storage unit 11 based on the control of the control unit 15 And a headphone 16 that converts an output signal from the playback unit 12 into sound and outputs the sound. A PLAY signal is sent from the control unit 15 to the reproduction unit 12. The audio data may be data including audio information data and other additional data.

  FIG. 2 shows the relationship between ambient sound level, threshold value Th1, and playback control according to the first embodiment of the present invention. In FIG. 2, the time axis indicates the passage of time from left to right, Th1 indicates a predetermined threshold, the ambient sound level indicates the signal level of ambient sound collected by the microphone 13, and the PLAY signal is output from the control unit 15. This is a reproduction control signal for reproducing at H and stopping at L. Th1 is set in advance to a sound level value that makes it difficult to hear the sound data being reproduced when the surrounding sound becomes Th1 or higher. The determination unit 14 compares the level of the ambient sound collected by the microphone 13 during reproduction of the audio data with Th1, and if the level of the ambient sound from the microphone becomes Th1 or higher, the comparison result signal indicates that Th1 has been exceeded. Is output. Upon receiving the comparison result signal from the determination unit 14, the control unit 15 sets the PLAY signal to L and stops the reproduction because there is a possibility that the voice data may not be heard. Thereafter, when the ambient sound level becomes equal to or lower than Th1, the control unit 15 sets the PLAY signal to H and resumes reproduction.

  According to the audio reproduction device of the first embodiment of the present invention, reproduction is paused when the surrounding sound is equal to or higher than a predetermined threshold during audio reproduction, and is reproduced when the surrounding sound is lower than the threshold. By resuming, it is possible to provide an audio reproducing device that does not miss the audio data being reproduced in the middle even if the surrounding sounds are loud.

(Embodiment 2)
Next, a second embodiment will be described. In the second embodiment of the present invention, when the level of a sound generated in the vicinity is close to the threshold value for determining the stop of reproduction, the first threshold value for determining the reproduction stop and the second threshold value for restarting the reproduction are used. An audio playback device that performs control using a threshold will be described.

  FIG. 3 shows a block diagram of an audio reproduction apparatus according to Embodiment 2 of the present invention. In FIG. 3, a storage unit 11 that stores voice data that is a learning material such as foreign language listening learning, a microphone 13 that collects ambient sounds, a predetermined threshold Th1 and a level of ambient sounds from the microphone 13 And a comparison for restarting reproduction by comparing a predetermined threshold value Th2 with the level of ambient sound from the microphone 13 The second determination unit 31 that outputs the result, the control unit 32 that controls the reproduction of the audio data, and the audio data stored in the storage unit 11 are paused or resumed based on the control of the control unit 32. The reproducing unit 12 and the headphones 16 that convert the output signal from the reproducing unit into sound and output the sound.

  FIG. 4 shows the relationship between the ambient sound level, threshold value Th1, threshold value Th2, and playback control according to the second embodiment of the present invention. In FIG. 4, the time axis indicates the passage of time from left to right, Th1 and Th2 indicate predetermined thresholds, the ambient sound level indicates the signal level of ambient sounds collected by the microphone 13, and the PLAY signal indicates the control unit 32. This is a playback control signal that plays back at H and that stops playback at L. Th1 is set in advance to a level value that makes it difficult to hear the audio data being reproduced when the surrounding sound becomes Th1 or higher. Th2 is set in advance to a value at which the sound data being reproduced can be heard when the surrounding sound becomes equal to or lower than Th2 and a level lower than Th1 (Th1> Th2). The first determination unit 14 compares the level of the ambient sound collected by the microphone 13 during reproduction of the audio data with Th1, and indicates that if the level of the ambient sound from the microphone exceeds Th1, it exceeds Th1. The comparison result signal is output. Similarly, the second determination unit 31 compares the level of the ambient sound collected by the microphone 13 with Th2, and compares that the level of the ambient sound from the microphone becomes lower than Th2 when the level of the ambient sound from the microphone becomes Th2 or less. Output the resulting signal. When the control unit 32 receives the determination result signal from the first determination unit 14, the audio data may become inaudible, so the playback is stopped with the PLAY signal set to L. When the level of the ambient sound becomes equal to or lower than Th2 and a comparison result signal is received from the second determination unit 31, the control unit 32 sets the PLAY signal to H and resumes reproduction.

  In addition, a description will be given with reference to FIG. 5 that two types of threshold values, a threshold value Th1 for stopping reproduction and a threshold value Th2 for resuming reproduction, are provided and further improved over the first embodiment. FIG. 5 shows the operation of the control signal when the surrounding sound collected by the microphone 13 is at a level close to Th1 when a loud sound is generated in the configuration of the first embodiment. In FIG. 5, the ambient sound level when a loud sound is generated is a level that once falls below Th1, and then rises and falls around Th1 again. Due to the change in the level of this ambient sound, the PLAY signal is also shown in FIG. Thus, the HL is repeated, and the playback and the stop are repeated at short intervals, which makes it difficult for the user of the audio playback device to hear. Therefore, by using two types of threshold values, Th1 and Th2, and by setting a difference between Th1 and Th2, it is possible to suppress an operation that repeats playback and stop in a short time due to a change in the level of ambient sound. I am going to do that.

  According to the audio reproduction device of the second embodiment of the present invention, when audio reproduction is performed by having two types of threshold values, the reproduction is paused when the ambient sound level is equal to or higher than a predetermined first threshold value. If the sound becomes less than the predetermined second threshold value, playback is resumed, so that the sound being played may be interrupted many times even if the surrounding sound is loud and the level is near the threshold at which playback stops. It is possible to provide an audio reproduction device that is easy to hear and has no sound.

(Embodiment 3)
Next, a third embodiment will be described. In Embodiment 3 of the present invention, an apparatus will be described in which playback is resumed after the playback position is returned to the previous position after the playback is paused after the judgment is performed on the surrounding sound and the playback is paused.

  FIG. 6 shows a block diagram of an audio reproducing apparatus according to Embodiment 3 of the present invention. In FIG. 6, a storage unit 11 that stores voice data, which is a learning material such as foreign language listening learning, a microphone 13 that collects ambient sounds, a predetermined threshold Th1, and a level of ambient sounds from the microphone 13 And a comparison for restarting reproduction by comparing a predetermined threshold value Th2 with the level of ambient sound from the microphone 13 The second determination unit 31 that outputs the result, the control unit 62 that controls the reproduction of the audio data, and the audio data stored in the storage unit 11 is set to the start of reproduction or the reproduction position based on the control of the control unit 62. And a headphone 16 that converts the output signal from the playback unit into sound and outputs the sound. In particular, a REW signal is sent from the control unit 62 to the reproduction unit 61 in addition to the PLAY signal.

  FIG. 7 shows the relationship between the ambient sound level, threshold value Th1, threshold value Th2, and playback control according to the third embodiment of the present invention. In FIG. 7, the time axis indicates the passage of time from left to right, Th1 and Th2 indicate predetermined threshold values, the ambient sound level indicates the signal level of ambient sounds collected by the microphone 13, and the PLAY signal is the control unit 62. Is a reproduction control signal that is outputted from H and reproduced at H and stopped at L. The REW signal is a control signal that is outputted from the control unit 62 and returns the reproduction position at H, and trew is a reproduction position by the REW signal. This is a predetermined time for returning to the previous position. Th1 is set in advance to a level value that makes it difficult to hear the audio data being reproduced when the surrounding sound becomes Th1 or higher. Th2 is set in advance to a value at which the sound data being reproduced can be heard when the surrounding sound becomes equal to or lower than Th2, and a value lower than Th1. trew stops playback at Th1 and resumes playback at Th2. If playback is resumed at the position where playback was stopped, it will be difficult to hear if the voice data is in the middle of sentence pronunciation. It is determined in advance to return and resume. The determination unit 14 compares the level of the ambient sound collected by the microphone 13 during reproduction of the audio data with Th1, and if the level of the ambient sound from the microphone exceeds Th1, the comparison result indicating that Th1 is exceeded. Output a signal. Similarly, the second determination unit 31 compares the level of the ambient sound collected by the microphone 13 with Th2, and compares that the level of the ambient sound from the microphone becomes lower than Th2 when the level of the ambient sound from the microphone becomes Th2 or less. Output the resulting signal. When the control unit 62 receives the determination result signal from the first determination unit 14, there is a possibility that the voice data may not be heard. When the ambient sound level becomes equal to or lower than Th2 and a comparison result signal is received from the second determination unit 31, the control unit 62 controls the playback unit 61 to set the REW signal to H during trew to return the playback position to the previous position. To do. After the lapse of trew, the control unit 62 stops the control to set the REW signal to L and return the playback position to the previous position, and sets the PLAY signal to H to resume playback.

  According to the sound reproducing device of the third embodiment of the present invention, when the ambient sound level is equal to or higher than the predetermined first threshold value, the reproduction is temporarily stopped and the surrounding sound becomes equal to or lower than the predetermined second threshold value. If this happens, the sound data being played back can be saved even if the surrounding sound is loud and the sentence or pronunciation is in the middle when the playback is stopped by returning the playback position to a predetermined time and restarting the playback. It is possible to provide an audio reproduction device that is easy to hear when listening to the sound is resumed without being missed.

(Embodiment 4)
Next, a fourth embodiment will be described. In Embodiment 4 of the present invention, after making a determination on surrounding sounds and pausing playback, if the playback position when paused is silent, the playback position is not returned to the previous position. An audio playback device that resumes playback after returning the playback position from the stopped position will be described.

  FIG. 8 shows a block diagram of an audio reproducing apparatus according to Embodiment 4 of the present invention. In FIG. 8, a storage unit 11 that stores voice data that is a learning material such as foreign language listening learning, a microphone 13 that collects ambient sounds, a predetermined threshold Th <b> 1, and a level of ambient sounds from the microphone 13 And a comparison for restarting reproduction by comparing a predetermined threshold value Th2 with the level of ambient sound from the microphone 13 The second determination unit 31 that outputs the result, the control unit 82 that controls the reproduction of the audio data, and the audio data stored in the storage unit 11 are set to the start of reproduction and the reproduction position based on the control of the control unit 82. The playback unit 81 resumes after returning to the state, the silence detection unit 83 detects the silent section in the playback unit 81, and the headphones 16 that convert the output signal from the playback unit 81 into sound and output it.

  The control for temporarily stopping the sound reproduction of the sound reproducing device according to the fourth embodiment of the present invention is the same as in the first to third embodiments, and the description thereof will be omitted. The silence detection unit 83 is configured to monitor the audio signal reproduced by the reproduction unit 81, detect a section that does not satisfy the predetermined threshold Th3 as a silence section, and inform the control unit 82 that it is a silence section. ing.

  FIG. 9 shows the relationship between the level of reproduced sound, the threshold value Th3 for silence detection, and the output signal of the silence detection result according to the fourth embodiment of the present invention. In FIG. 9, the time axis indicates the passage of time from left to right, Th3 indicates a predetermined threshold, the playback sound level indicates the level in the playback unit 81, and silence detection 1 indicates the silence state output from the silence detection unit 83. The detected signal is output as H when a silent state in which the reproduced sound level is lower than the threshold value Th3 is detected. In the fourth embodiment of the present invention, the silent section in which the silent state continues for a predetermined time or more is described as being determined by the control unit 82 using the silence detection 1 signal.

  Next, the operation when resuming playback will be described. FIG. 10 shows a flow at the time of resuming sound reproduction of the sound reproducing device according to the fourth embodiment of the present invention. In FIG. 10, in a state where the ambient sound level is equal to or higher than the threshold Th1 and the reproduction is stopped, and the ambient sound level is equal to or lower than the threshold Th2 (S101), the output from the silence detection unit 83 is output when the reproduction is stopped. If it is L and not a silent section (S102), the playback position is moved back by tew from the position where playback was stopped (S103), and playback is resumed (S104). When the reproduction is stopped and the output from the silence detecting unit 73 is H indicating silence and is a silent section (S102), the reproduction is resumed from the position where the reproduction is stopped (S104).

  The relationship between the ambient sound level, threshold value Th1, threshold value Th2, and playback control according to the fourth embodiment of the present invention is the same as that in FIG. If it is a silent section when the reproduction is paused, it is the same as FIG. 4 described in the second embodiment.

  According to the audio reproduction device of the fourth embodiment of the present invention, when the ambient sound level is equal to or higher than the predetermined first threshold value, the reproduction is paused, and the ambient sound becomes equal to or lower than the predetermined second threshold value. Then, when the playback is paused when the playback is paused, the playback is resumed at the stopped position, and if it is not the silent section, the playback is resumed after returning the playback position for a predetermined time to the front, Even if the surrounding sound is loud and the sentence or pronunciation is in the middle when the playback is stopped, the voice data being played is not missed in the middle. It is possible to provide an audio reproducing apparatus that does not reproduce a useless silent section.

  Note that several methods have been proposed for the silent section detection method described in the fourth embodiment of the present invention. In the present invention, the above-described method is used. The method may use other methods.

(Embodiment 5)
Next, a fifth embodiment will be described. Embodiment 5 of the present invention relates to an apparatus that performs judgment on surrounding sounds and pauses playback, and then resumes playback after returning the playback position to the position of the previous silent section from the paused position. explain.

  The block diagram of the fifth embodiment of the present invention is the same as that of the fourth embodiment shown in FIG. 8, and will be described with reference to FIG. The audio data stored in the storage unit 11 is reproduced by the reproduction unit 81. Based on the comparison result between the signal level of ambient sounds collected from the microphone 13 during reproduction and a predetermined threshold value Th1, a determination result is output from the first determination unit 14, and the control unit 82 outputs the ambient sound as the threshold value Th1. If it is above, playback is stopped with the PLAY signal set to L for the playback unit 81. As described with reference to FIG. 9, the silence detection unit 83 outputs H in the silence detection 1 indicating silence in a section where the reproduction sound level of the audio data being reproduced by the reproduction unit 81 is equal to or less than the threshold Th3. The silence detection 2 is a silence detection result signal output from the silence detection unit 83 in the same manner as the silence detection 1, and is a silence state in which the reproduction sound level is smaller than the threshold value Th3 and has a predetermined time t1. If it is above, H is output. In the present embodiment, the control unit 82 uses the silence detection 2 to store the address of the audio data in the storage unit 11 corresponding to the end of the reproduction position of the silent period when the silent state continues for t1 or more. The address of the stored voice data is the end position of the previous silent section and the next position where the voice data is resumed.

  Next, a description will be given of the control for restarting reproduction when the surrounding audio level output from the microphone 13 is equal to or lower than a predetermined threshold Th2. Based on the comparison result from the second determination unit 31, when the control unit 82 determines that the ambient sound level is equal to or lower than the threshold Th2, the control unit 82 returns the reproduction position of the audio data to the reproduction position stored at the time of stop and reproduces it. To start. As a result, the reproduction is resumed in the silent section immediately before the position where the reproduction is stopped. Further, as a method of returning the reproduction position to the position of the immediately preceding silent section, the method in which the control unit 82 in FIG. 8 controls the reproduction unit 81 using the REW signal to return to the corresponding address position is also possible. As shown in the block diagram, the control unit 112 may control to transfer the audio data from the address to the storage unit 11 to the reproduction unit 111 without using the REW signal. FIG. 11 is a diagram in which the REW signal is deleted from FIG.

  The relationship between the ambient sound level, threshold value Th1, threshold value Th2 and playback control in the fifth embodiment of the present invention corresponds to the playback unit 81 controlled by the control unit 82 using the REW signal in the block diagram of FIG. When the method of returning to the address position is used, it is the same as FIG. 7 described in the third embodiment. trew is set to the time taken to return to the address position of the storage unit 11 associated with the position of the previous silent section stored by the control unit 82. In the case of the method using the block diagram of FIG. 11, it is the same as FIG. 4 described in the second embodiment.

  According to the audio reproduction device of the fifth embodiment of the present invention, when the ambient sound level is equal to or higher than the predetermined first threshold value, the reproduction is paused, and the ambient sound becomes equal to or lower than the predetermined second threshold value. Then, playback is paused and playback is resumed from the position of the silent section immediately before the position, so even if the surrounding sound is loud and playback is stopped, even if the sentence or pronunciation is in the middle, the audio data being played Therefore, it is possible to provide an audio reproduction device that is easy to hear because the reproduction is performed from the silent section that is the break of the immediately preceding reproduction sound when reproduction is resumed.

  It should be noted that several methods have been proposed in the past for detecting the silent detection section, storing the silent section position, and moving the playback position to the stored position, and will be described in Embodiment 5 of the present invention. Other methods may be used. In addition, depending on the data format of the audio data, when a code for identifying sound and silence is provided as a unit of the audio data, the silence may be detected using the identification code.

(Embodiment 6)
Next, a sixth embodiment will be described. In the sixth embodiment of the present invention, after judgment is performed on surrounding sounds and playback is paused, playback is resumed after returning the playback position to a predetermined mark position immediately before the paused position. The apparatus will be described.

  FIG. 12 shows a block diagram of an audio reproducing apparatus according to Embodiment 6 of the present invention. In FIG. 12, a storage unit 121 that stores voice data, which is a learning material for foreign language listening learning, a microphone 13 that collects ambient sounds, a predetermined threshold Th1, and a level of ambient sounds from the microphone 13 And a comparison for restarting reproduction by comparing a predetermined threshold value Th2 with the level of ambient sound from the microphone 13 The second determination unit 31 that outputs the result, the control unit 122 that controls the reproduction of the audio data, and marks the start and the reproduction position of the audio data stored in the storage unit 121 based on the control of the control unit 122 Is constituted by a reproducing unit 61 that returns to the address position corresponding to and restarts, and a headphone 16 that converts an output signal from the reproducing unit into sound and outputs the sound.

  The voice data, which is a foreign language listening learning material or the like stored in the storage unit 121, includes additional data including control data in addition to voice information data. If the additional data is data for listening learning, the mark set by the user at an arbitrary position such as the beginning of the sentence, an address associated with the mark, additional information of other marks, and the like are stored.

  The relationship between the ambient sound level, threshold Th1, threshold Th2, and playback control according to the sixth embodiment of the present invention is that playback is paused if the ambient sound level is equal to or higher than threshold Th1, and playback is stopped when the level is lower than threshold Th2. The control for returning the reproduction position to the mark position immediately before the performed position and restarting the reproduction is performed, which is the same as FIG. 4 described in the second embodiment.

  Next, the operation when resuming playback will be described. FIG. 13 shows a flow at the time of resuming the sound reproduction of the sound reproducing device according to the sixth embodiment of the present invention. In FIG. 13, when the ambient sound level is equal to or higher than the threshold Th1 and the playback is stopped, and the ambient sound level is equal to or lower than the threshold Th2 (S131), the playback start position of the mark immediately before the playback stop position is changed. The position is returned (S132), and the reproduction is resumed (S133).

  According to the sound reproduction device of the sixth embodiment of the present invention, when the ambient sound level is equal to or higher than the predetermined first threshold value, the reproduction is paused, and the surrounding sound is equal to or lower than the predetermined second threshold value. Then, by restarting playback from the position of the mark immediately before playback is paused, even if the surrounding sound is loud and playback is stopped, the voice data being played back It is possible to provide an audio playback device that is easy to hear because it is played back from the mark position set at the head of the immediately preceding sentence or the like when the playback is resumed without being missed.

  Note that several methods have been proposed for storing marks, managing them, and moving the playback position to the position associated with the mark, and use methods other than those described in the sixth embodiment of the present invention. May be.

  Furthermore, the storage unit for storing the voice data, which is a learning material for foreign language listening learning, may be a recording medium such as an external memory such as a removable memory card, a built-in memory, or a CD.

(Embodiment 7)
Next, a seventh embodiment will be described. In the sound reproduction apparatuses according to Embodiments 1 to 6 of the present invention, the microphone for collecting sound has been described as a dedicated apparatus. However, in Embodiment 7 of the present invention, this function is applied to a portable terminal apparatus such as a cellular phone. Therefore, when a microphone is incorporated in a mobile phone, a device that doubles as a microphone of a cellular phone used in a conventional cellular phone will be described. FIG. 14 shows a block diagram of a mobile phone incorporating a microphone. In FIG. 14, a cellular phone 1401 receives received data via an antenna 1402, demodulates it by a radio unit 1403, transfers the data to a control unit 1404, converts it to audio by an audio processing unit 1407, and converts it into a speaker. Audio output is performed from 1408. In the transmission, voice input from the microphone 1410 is converted into voice data by the voice processing unit 1407, the data is transferred to the control unit 1404, modulated by the radio unit 1403, and transmitted from the antenna 1402. The memory 1405 stores a program for operating the mobile phone 1401. The external memory 1406 stores other data of the user. Audio data for audio reproduction may be stored in either the memory 1405 or the external memory 1406.

  According to the mobile phone of the seventh embodiment of the present invention, when the ambient sound level is equal to or higher than the predetermined first threshold value, the playback is paused so that the ambient sound becomes equal to or lower than the predetermined second threshold value. For example, if the surrounding sound is loud and playback is stopped by returning the playback position to the previous time or the previous silent section or the previous mark and restarting playback, In addition, it is possible to provide a mobile phone having an audio reproduction function that does not miss the audio data being reproduced midway and is easy to hear when the reproduction is resumed.

  According to the sound reproducing device of the present invention, even if a loud sound is generated in the surroundings while reproducing sound data such as foreign language listening learning, the sound is picked up by the microphone and is equal to or higher than a predetermined first threshold value. If there is, the playback is paused, and if it falls below the predetermined first or second threshold, the playback is started from the position where the playback is slightly returned, the position of the previous silent section or the mark position set immediately before the beginning of the sentence, etc. Since the reproduction can be performed without missing the audio data by resuming, it is useful as an audio reproduction device for listening learning, particularly a portable audio reproduction device.

1 is a block diagram of an audio playback device according to a first embodiment of the present invention. Relationship diagram between ambient sound level, threshold Th1, and reproduction control according to Embodiment 1 of the present invention The block diagram of the audio | voice reproduction apparatus of Embodiment 2 of this invention. Relationship diagram between ambient sound level, threshold values Th1 and Th2, and reproduction control according to Embodiment 2 of the present invention Relationship diagram between ambient sound level, threshold value Th1, and reproduction control according to Embodiment 2 of the present invention Block diagram of the audio reproduction apparatus according to the third embodiment of the present invention. Relationship diagram between ambient sound level, threshold values Th1 and Th2, and playback control according to the third embodiment of the present invention Block diagram of a sound reproducing apparatus according to Embodiment 4 of the present invention. FIG. 7 is a relationship diagram of the level of reproduced sound, threshold Th3, and silence detection signal according to the fourth embodiment of the present invention FIG. 9 is a flowchart when resuming sound reproduction in the sound reproducing device according to the fourth embodiment of the present invention. Block diagram of an audio playback apparatus in a fifth embodiment of the present invention Block diagram of an audio reproduction apparatus according to Embodiment 6 of the present invention. Flow chart when resuming sound reproduction of the sound reproducing device according to the sixth embodiment of the present invention. Block diagram of a mobile phone equipped with the audio playback device of the seventh embodiment of the present invention

Explanation of symbols

11, 121 Storage unit 12, 61, 81, 111 Playback unit 13 Microphone 14 First determination unit 15, 32, 62, 82, 112, 122 Control unit 16 Headphone 31 Second determination unit 83 Silence detection unit 1401 Mobile phone 1402 Antenna 1403 Radio unit 1404 Control unit 1405 Memory 1406 External memory 1407 Audio processing unit 1408 Speaker 1409 Headphone 1410 Microphone

Claims (6)

A storage unit that stores audio data, a microphone that collects sound, a determination unit that compares a sound level output from the microphone with a predetermined threshold, and outputs a result, and audio data stored in the storage unit And a playback unit that plays back the audio data stored in the storage unit based on the control of the control unit, and the audio data based on the comparison result output from the determination unit A sound reproduction apparatus for controlling pause and resumption of reproduction of a video. From the microphone, a storage unit that stores audio data, a microphone that collects sound, a first determination unit that compares a sound level output from the microphone with a predetermined first threshold value, and outputs a result A second determination unit that compares the level of the output sound with a predetermined second threshold and outputs a result; a control unit that controls reproduction of audio data stored in the storage unit; and the storage unit A reproduction unit that reproduces the audio data stored in the control unit based on the control of the control unit, and pauses reproduction of the audio data based on the comparison result output from the first determination unit, An audio reproducing apparatus that performs control to resume reproduction of the audio data based on a comparison result output from the second determination unit. From the microphone, a storage unit that stores audio data, a microphone that collects sound, a first determination unit that compares a sound level output from the microphone with a predetermined first threshold value, and outputs a result A second determination unit that compares the level of the output sound with a predetermined second threshold and outputs a result; a control unit that controls reproduction of audio data stored in the storage unit; and the storage unit A reproduction unit that reproduces the audio data stored in the control unit based on the control of the control unit, pauses reproduction of the audio data based on the comparison result output from the first determination unit, and An audio reproducing apparatus, wherein reproduction is resumed from a position where a predetermined time is returned from the position where the audio data is temporarily stopped based on the comparison result output from the second determination unit. From the microphone, a storage unit that stores audio data, a microphone that collects sound, a first determination unit that compares a sound level output from the microphone with a predetermined first threshold value, and outputs a result A second determination unit that compares the level of the output sound with a predetermined second threshold and outputs a result; a control unit that controls reproduction of audio data stored in the storage unit; and the storage unit A reproduction unit that reproduces the audio data stored in the control unit based on the control of the control unit, and a silence detection unit that detects a silence state in the reproduction unit, and the comparison output from the first determination unit Based on the result, the reproduction of the audio data is paused, and the audio data is preliminarily determined based on the comparison result output from the second determination unit and the output result of the silence detection unit at the time of pause. Playback resumes from where it was returned to Audio reproducing apparatus according to claim Rukoto. From the microphone, a storage unit that stores audio data, a microphone that collects sound, a first determination unit that compares a sound level output from the microphone with a predetermined first threshold value, and outputs a result A second determination unit that compares the level of the output sound with a predetermined second threshold and outputs a result; a control unit that controls reproduction of audio data stored in the storage unit; and the storage unit A comparison result output from the first determination unit, and a reproduction unit that reproduces the audio data stored in the reproduction unit based on the control of the control unit, and a silence detection unit that detects a silence state in the reproduction unit Based on the result, the reproduction of the audio data is paused, and the audio data is reproduced from the position of the silent section where the silence state continues for a predetermined time immediately before based on the comparison result output from the second determination unit. Voice characterized by resuming Raw devices. A storage unit that stores audio data and additional data including a mark associated with an address of the audio data, a microphone that collects sound, a level of sound output from the microphone, and a predetermined first threshold value are compared. A first determination unit that outputs a result, a second determination unit that compares a level of ambient sound output from the microphone with a predetermined second threshold value, and outputs the result, and is stored in the storage unit A control unit that controls the reproduction of the audio data and a reproduction unit that reproduces the audio data stored in the storage unit based on the control of the control unit, and the comparison output from the first determination unit The audio reproduction is characterized in that the reproduction of the audio data is paused based on the result, and the audio data is resumed from the position of the immediately preceding mark based on the comparison result output from the second determination unit. apparatus.

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