JP4882327B2 - Content playback apparatus, content playback method, and content playback program - Google Patents

Description

  The present invention relates to a content reproduction apparatus that repeatedly reproduces audio content, a reproduction method thereof, and a reproduction program.

2. Description of the Related Art Conventionally, a playback apparatus capable of repeatedly playing back sound contents such as sound effects such as alarm sounds / alarm sounds and music (for example, see Patent Document 1). This allows the designated content to be simply reproduced repeatedly as it is, or to be reproduced at a different reproduction speed.
Japanese Utility Model Publication No. 7-41600

  However, when repeated playback is performed by the above playback device, the entire content such as sound effects and music is the unit of repetition. Therefore, when a certain content is reproduced repeatedly, the content is reproduced at a constant speed and volume from the beginning to the end. Of course, it is also possible to manually change the speed and volume for a specific part of the content during playback, but it is very complicated to repeat the same operation for each repeated playback.

  In addition, although the playback apparatus can play back the entire content at the same playback speed, the playback sound (audio waveform) of the entire content changes, and the main part of the content, for example, Even the sounding part of the alarm sound is distorted.

  As described above, the conventional technique has a limitation in the method of repeatedly reproducing the content, and there is a problem that various expressions cannot be performed in the content reproduction.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a content reproduction apparatus capable of repeatedly reproducing the audio content using a reproduction expression suitable for the characteristics of the audio content, and the repetition thereof. To provide a reproduction method and a program for executing repetitive reproduction.

  In this specification, the term “voice” includes all sounds such as human voice, alarm sounds such as alarm sounds, and music.

The present invention has been made to solve the above-described problems. The present invention relates to a first block in which audio data is included in a predetermined amount or more on the time axis, and a second block other than that. a content storage unit for storing divided into a block, and the reproduction condition setting means for setting the reproducing conditions of the at least one block of the audio content, all the blocks of the audio content from the beginning in accordance with the set reproduction conditions Repeat playback means for repeatedly playing to the end in order , wherein the playback condition setting means repeatedly plays back the audio content at the playback speed when playing back the second block as the playback condition. The content reproduction apparatus is characterized in that it is set so as to change gradually every time .

The present invention, in the content reproduction apparatus, the reproduction condition setting means, sets as the playback condition, the playback speed when reproducing the first block, at least one of the volume or pitch, characterized in that it.

The present invention, in the content reproduction apparatus, the reproduction condition setting means, said reproduction conditions, and setting to change gradually proceeds manner each time to play repeatedly the audio content .

In addition, the present invention provides a content storage unit that stores audio content, a first block that designates a division point on the time axis in the audio content, and the audio content includes a predetermined amount or more of audio data; Splitting means for splitting into other second blocks , playback condition setting means for setting playback conditions for at least one block of the audio content, and all blocks of the audio content according to the set playback conditions Repeated reproduction means for repeating reproduction from the beginning to the end in order , wherein the reproduction condition setting means repeats the audio content at a reproduction speed when reproducing the second block as the reproduction condition. It is a content playback apparatus characterized in that it is set so as to change gradually each time playback is performed.

Further, the present invention is the reproduction of at least one block of the first block and the audio content stored otherwise divided and into a second block that contains the audio data for more than a certain amount on the time axis and reproduction condition setting step of setting a condition, and a reproduction step of reproducing repeatedly in order from start to finish all the blocks of the audio content in accordance with the set reproduction conditions has, the reproduction condition setting step, the The content playback method is characterized in that as a playback condition, a playback speed when playing back the second block is set so as to gradually change every time the audio content is played back repeatedly .

Further, the present invention causes a computer storage unit for storing audio content is divided into a first block and the other of the second block that contains the audio data for more than a certain amount on the time axis A step of reading out the audio content from, a reproduction condition setting step of setting a reproduction condition of at least one block of the read out audio content, and all blocks of the audio content from the beginning according to the set reproduction condition What content playback program der for executing a playback step of playing back repeatedly in order to end the reproduction condition setting step, as the playback condition, the playback speed when reproducing the second block, The audio content is set so as to change gradually each time it is played back repeatedly. Ntsu Ru playback program Der.

According to the present invention, when reproducing repeatedly a single audio content stored in a plurality of blocks on a time axis, by setting independently a playback condition of each block, the reproducing conditions Accordingly, each block is reproduced in an individual manner, so that the expressive power of audio content reproduction can be enhanced. Then, by appropriately setting the re Namajo matter of each block depending on the audio content, it is possible to perform repetitive playback by suits expression characteristics of audio content. Further, according to the present invention, the reproduction sound of the section (first block) having meaningful audio information can be reproduced only by the silent section (second block). The playback speed of the entire audio content can be adjusted without changing the. Furthermore, according to the present invention, the playback speed, which is the playback condition, gradually changes with the number of repetitions, so that it is possible to effectively play audio content such as alarm sounds and alarm sounds.

Further, according to the present invention, since the playback speed, volume, or pitch is set in the first block, it is possible to perform repeated playback with these playback conditions freely changed.

Further, according to the present invention, than playback speed is the reproduction condition together with the number of repetitions, the volume or pitch is gradually changed, it is possible to reproduce the audio content effectively.

Further, according to the present invention, even when audio content is stored in a state where it is not divided, it is possible to designate a block division point, and thus it is possible to perform repeated reproduction with various expressions.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an electrical configuration of a content reproduction apparatus according to an embodiment of the present invention, and shows an alarm sound reproduction apparatus mounted on an automobile.

  In the figure, the automobile has a host CPU 11 that controls the entire automobile and commands the sound source device 10 to generate an alarm sound according to the situation, and a plurality of audio contents (audio data of the alarm sound). Are mounted, an external memory 12 for storing the sound, a sound source device 10 for performing reproduction processing of audio content, and a speaker 13 for generating an audio signal as an electric signal as sound. Note that the sound source device 10 and the external memory 12 correspond to the content reproduction apparatus according to the present invention.

  Here, the audio content in the external memory 12 is stored in advance by dividing the data into a plurality of blocks on the time axis (see FIG. 3). Then, as will be described later, the sound source device 10 (the control CPU 21) designates a separate reproduction condition for each block, and then processes so that the entire audio content is repeatedly reproduced.

  The sound source device 10 is a semiconductor chip in which a control CPU 21, a CPU-I / F 22, an external memory I / F 23, a ROM 24, a RAM 25, a sound source unit 26, and a DAC 27 are integrated.

  The control CPU 21 is a central processing unit that executes a program stored in the ROM 24 to perform repeated playback of audio content.

  The CPU-I / F 22 is an interface for communicating with the host CPU 11 to receive an alarm sound generation command and the like, and the external memory I / F 23 is an interface for receiving audio content data from the external memory 12.

  The ROM 24 is a read-only memory for storing a program for repeatedly playing back audio content, other control programs, various parameters for specifying various playback conditions of the audio content, and the RAM 25 is work data being processed. Is an occasional write / read memory for temporarily storing.

  The sound source unit 26 is a sound source core that generates an actual audio signal from the audio data processed by the control CPU 21.

  The DAC 27 is a digital-analog converter that converts the digital audio signal generated by the sound source unit 26 into an analog audio signal to be input to the speaker 13.

Next, an operation in which the above-described content reproduction apparatus reproduces audio content repeatedly will be described with reference to a flowchart shown in FIG.
First, when it is detected that the vehicle equipped with the content reproduction device is in a predetermined state, for example, the traveling speed exceeds the legal speed limit, or the course fluctuates due to a drowsy driving or the like, the host CPU 11 Outputs a warning sound generation command to the sound source device 10 (step S1).

  Then, the control CPU 21 that has received the sound generation command reads out the sound data (sound content) of the alarm sound α from the external memory 12 and stores it in the RAM 25 (step S2). Here, it is assumed that the alarm sound α is audio data composed of the first half A block and the second half B block, where the A block is a performance section having a predetermined melody, and the B block is a silent section where no sound is recorded. That is, when the alarm sound α is reproduced as it is, the melody of the A block is played first, and then the silent part of the B block continues.

  It is assumed that the playback parameters during normal playback of the alarm sound α are the playback speed s, the volume v, and the pitch (pitch) p serving as a reference for the alarm sound α for both the A and B blocks.

  Further, the control CPU 21 calls a reproduction parameter for repeated reproduction from the ROM 24 (step S3). These parameters are changes in reproduction speed, volume, and pitch, and are represented by Δs, Δv, and Δp, respectively.

  Next, repeated playback of the alarm sound α is started by a command from the control CPU 21. First, the repetition counter is set to zero (step S4).

  Then, the audio data of the A block that is the first block of the alarm sound α is called from the RAM 25, and the reproduction condition is set (step S5). This playback condition is defined in advance in the ROM 24 in accordance with the characteristics of the audio content to be played back, and determines how the playback speed, volume, and pitch of each block are changed at each repeated playback. It is a thing.

  Here, for the alarm sound α, the volume and pitch of the A block (melody performance section) gradually increase with the number of repetitions, and the B block (silent section) in order to enhance the alarm effect during repeated playback. It is assumed that the playback conditions are selected such that the playback speed of the video is gradually increased. FIG. 3 is a diagram schematically showing how the alarm sound α is repeatedly reproduced under such a reproduction condition. In other words, since the interval at which the alarm sound is played is gradually shortened and the volume and pitch are gradually increased, it is possible to give the listener a sense of urgency over time. It has become.

  As shown in the figure, at the time of the first reproduction, both the A and B blocks are reproduced according to the original reproduction parameters s, v, and p. For playback of the A block after the second time, the volume changes like v + Δv for the second time, v + 2Δv for the third time, v + 3Δv for the fourth time, etc., and the pitch for the second time is p + Δp for the third time. Reproduction is performed with p + 2Δp and the fourth time changed to p + 3Δp. For the B block, the playback speed changes as s + Δs for the second time, s + 2Δs for the third time, s + 3Δs for the fourth time, and so on.

Returning to the flowchart of FIG.
When the playback condition of the A block is set as described above, the audio data of the A block is sent to the sound source unit 26, and the voice playback process is performed under the set playback condition, and the speaker 13 is connected via the DAC 27. Is output (step S6).

  When the reproduction of the block is completed (“Yes” in step S7), it is determined whether there is a next block (step S8). The operation from S5 is performed and the next block is reproduced. When the reproduction of all the blocks is completed, the determination in step S8 is “No”, and the operation moves to the next step S9. Thus, one playback of one audio content is completed.

  Here, with respect to the alarm sound α, the above-described reproduction condition is set in the B block which is the second block, and reproduction under the condition is executed. Since there is no block next to the B block, the process proceeds to step S9 when the reproduction of the B block is completed.

  In step S9, the repeat counter is incremented by 1 in response to the completion of one playback of the audio content.

  Then, it is determined by referring to the repetition counter whether or not the number of repetitions of the audio content has reached the predetermined number of repetitions (step S10), and the reproduction of the alarm sound α is stopped when the predetermined number of reproductions are repeated. (“Yes” at the same step). When the predetermined number of repetitions has not yet been reached (“No” in the same step), the operation from step S5 is performed again, and all the blocks are reproduced again in order from the first block. At this time, as described above, the playback condition of each block at the time of repeated playback is set such that the playback parameter changes by Δs, Δv, and Δp for each repetition.

As described above, according to the above-described embodiment, the audio content (alarm sound α) divided into two A blocks and B blocks on the time axis is stored in the external memory 12, and the audio content can be repeatedly reproduced. When instructed, three types of playback parameters, playback speed, volume, and pitch, are set independently for each block as playback conditions. These three playback parameters are set so as to gradually change with the number of repetitions. Then, the audio content is repeatedly reproduced a predetermined number of times in accordance with the set reproduction condition. Thus, by setting appropriate playback conditions for each block, it is possible to perform repeated playback using expressions that match the characteristics of the audio content.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to
For example, the audio content is not limited to alarm sound or alarm sound, and may be content such as music. Further, one audio content may be divided into three or more blocks instead of two blocks of A block and B block.

  In the above embodiment, the parameters to be changed at the time of repeated reproduction are the volume and pitch in the A block and the reproduction speed in the B block. However, other parameters are changed, for example, all parameters are changed for each block. Of course, it can be set to change.

  In the above embodiment, the audio content in the external memory 12 has been described as being divided and stored in advance. However, the audio content is stored in a state where it is not divided, and the reproduction content is on the time axis as a playback parameter. A division point may be set, and division may be performed at the division point when the audio content is read to the RAM 25.

  Furthermore, the audio content may be stored in the sound source device 10 instead of the external memory 12. Moreover, this content reproduction apparatus is not limited to the one mounted on the automobile, and can naturally be applied to a general music player.

  The present invention is suitable for use in a content reproduction apparatus that repeatedly reproduces audio content, and is particularly suitable for use in a reproduction apparatus that generates an alarm sound or an alarm sound.

It is a block diagram which shows the electric constitution of the content reproduction apparatus by one Embodiment of this invention. 3 is a flowchart showing an operation of repeated playback in the content playback apparatus of FIG. It is the schematic diagram which showed a mode that the alarm sound (alpha) was reproduced | regenerated repeatedly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Sound source device 11 ... Host CPU 12 ... External memory 13 ... Speaker 21 ... Control CPU 22 ... CPU-I / F 23 ... External memory I / F 24 ... ROM 25 ... RAM 26 ... Sound source part 27 ... DAC

Claims (6)

A content storage unit for dividing and storing into a first block and the other of the second block that contains a predetermined amount or more of the audio data on the time axis of audio content,
Reproduction condition setting means for setting a reproduction condition for at least one block of the audio content;
Repeated playback means for repeatedly playing back all the blocks of the audio content in order from the first to the last according to the set playback conditions;
Comprising
The reproduction condition setting means sets, as the reproduction condition, a reproduction speed when reproducing the second block so as to gradually change every time the audio content is reproduced repeatedly. Content playback device. The reproduction condition setting means, as the reproduction condition, according to claim 1, wherein the first playback speed when reproducing the block, characterized in that to set at least one of the volume or pitch, Content playback device. The reproduction condition setting means, content reproduction apparatus according to claim 2, characterized in that to set the reproduction conditions, to change gradually proceeds manner each time to play repeatedly the audio content. A content storage unit for storing audio content;
A division unit operable to specify the split point on the time axis in audio content, dividing the audio content in the first block and the other of the second block that contains a predetermined amount or more of voice data,
Reproduction condition setting means for setting a reproduction condition for at least one block of the audio content;
Repeated playback means for repeatedly playing back all the blocks of the audio content in order from the first to the last according to the set playback conditions;
Comprising
The reproduction condition setting means sets, as the reproduction condition, a reproduction speed when reproducing the second block so as to gradually change every time the audio content is reproduced repeatedly. Content playback device. Reproduction condition of setting a playback condition in at least one of the blocks of the first block and the audio content stored otherwise divided and into a second block that contains a predetermined amount or more of audio data on the time axis Configuration steps;
And a reproduction step of repeatedly reproduced in the order of all the blocks from the first to the last of the audio content in accordance with the set reproduction conditions, has,
In the reproduction condition setting step, as the reproduction condition, the reproduction speed when reproducing the second block is set so as to gradually change every time the audio content is reproduced repeatedly. Content playback method. On the computer,
A step of reading the voice content from the storage unit to store audio content is divided into a first block and the other of the second block that contains a predetermined amount or more of the audio data on the time axis,
A playback condition setting step for setting a playback condition for at least one block of the read audio content;
A playback step of repeatedly playing back all blocks of the audio content in order from the beginning to the end according to the set playback conditions;
A content playback program for executing
In the reproduction condition setting step, as the reproduction condition, the reproduction speed when reproducing the second block is set so as to gradually change every time the audio content is reproduced repeatedly. Content playback program.

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