JP4003050B2 - Audio signal playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the technical field of audio equipment, and more particularly to an audio signal reproducing apparatus having a sound effect addition control function when reproducing a digital sound source.
[0002]
[Prior art]
An audio signal reproduction apparatus (hereinafter also simply referred to as an apparatus) that reproduces a sound source recorded on a CD, HDD, MD, DVD, etc., and has a function of adding an acoustic effect such as simulating and reproducing the sound of a hall. There is something built in.
[0003]
In such a device, an acoustic effect adding circuit (formerly called a reverb circuit is used at the time of selecting a function type of an acoustic effect and switching a source on the reproduction side. In recent digital sound sources, a DSP (digital signal processor) is used. ) Is generally used.) The control processing of the sound effect is initialized and muting is performed, but playback control and sound effect control are performed independently. There was no movement linked to the operation on the playback circuit side. That is, as shown in FIG. 4, the reproduction control unit 4 that controls the reproduction circuit 1 of the reproduction sound source such as a CD, the audio muting block 3 immediately before the audio output OUT, and the acoustic effect control unit 5 that controls the acoustic effect addition circuit 2 Playback control and sound effect control were performed independently of each other. Although there is a device in which the reproduction control unit 4 and the sound effect control unit 5 are integrated, even in that case, the control is independent of each other and is not interlocked with each other.
[0004]
[Problems to be solved by the invention]
For this reason, for example, when the playback sound source is a CD, when the music is continuously played back, the sound effect adding circuit 2 adds a reverberation for a long time, so that a new song is added. Playback is performed while the reverberation effect generated at the end of the previous song at the start of playback is left, which is undesirable and inconvenient as playback quality.
[0005]
Conversely, if the audio output is simply muted at the end of the song playback or the addition of the sound effect is discontinued, the reverberation caused by the reverberation due to the sound effect at the end of the song will disappear. There is.
[0006]
The above inconveniences are due to the fact that the operator forcibly terminates playback by key input or shifts to another song, and when playback is terminated without key input and playback control and sound effects are added. Since the situation where the control is placed is different, it is desired that the situation is solved by the interlocked control according to the situation.
[0007]
The present invention has been made in view of the above circumstances, and provides an audio signal reproduction apparatus having a configuration in which a control unit performs control for adding sound effects and muting in conjunction with control on the reproduction side.
[0008]
[Means for Solving the Problems]
The present invention includes a reproduction circuit 1 for a reproduction sound source, an acoustic effect addition circuit 2 for imparting an acoustic effect to an output from the reproduction circuit 1, an audio muting block 3 for muting an audio output, and the acoustic effect. In the audio signal reproduction device 20 including the control unit 7 that controls the sound effect addition function by the addition circuit 2,
The control unit 7 is, if any key input S of the transition to stop or another song (i) the song is performed, the audio output OUT while muting by controlling the audio muting block 3 to stop the playback operation, to release the muting by the audio muting block 3 with the addition of newly set sound effect to initialize the sound effect adding circuit 2 at the reproduction start instruction time point of a new song, ( B) When the reproduction of a song is completed instead of the key input S, the reproduction operation is stopped and the sound effect addition control to the sound effect addition circuit 2 is performed until a preset time or the sound of the sound effect addition circuit 2 until detecting the end of the effect adding is continued, then Myute audio output OUT by the audio muting block 3 Is ring, following from the end if the, sound effect adding control to the sound effect adding circuit 2 in the previous song for starting playback of the next track song playing after the end instead of (c) the key input S At the time of instructing to start playing the song, the sound effect adding circuit 2 is initialized to add the newly set sound effect, and the muting by the audio muting block 3 is canceled, and then the next song Means for controlling the start and end of the sound effect adding circuit 2 and the muting of the audio muting block 3 in conjunction with the playback control of the playback circuit 1 so as to start the playback operation of the audio muting block 3. The above object is achieved by providing the audio signal reproducing device 20 characterized.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of an audio signal reproduction device according to the present invention will be described with reference to the drawings. FIG. 1 is a block circuit diagram of an audio signal reproducing apparatus according to the present invention. FIG. 2 is a flowchart of playback control and sound effect addition control when playback stop and playback restart key inputs are sequentially performed. FIG. 3 is a flowchart of the reproduction control and the sound effect addition control in the case where the reproduction is completed up to the end of the music instead of the key input and the next music is reproduced following the completion of the reproduction.
[0010]
As shown in FIG. 1, an audio signal reproducing device 20 including a control unit that controls a sound effect adding function by the sound effect adding circuit of the present invention includes a reproduction circuit block 1 of a reproduction sound source such as a CD or an HDD, and an audio output OUT. This is a configuration in which a control unit 7 composed of a microcomputer that performs playback control and sound effect control in conjunction with the sound effect adding circuit 2 composed of the immediately preceding audio muting block 3 and DSP is provided. .
[0011]
In the control unit 7, a program for causing the computer to execute the following processing procedures (A), (B), and (C) is recorded in the ROM of the microcomputer or an external nonvolatile memory in advance. .
[0012]
(B) As shown in FIG. 2, when the operator performs any key input S for stopping the song or shifting to another song, the reverberation of the acoustic effect is immediately terminated for the operator. Because it is better, when the operator's stop (including pause) operation is detected, the audio output OUT is muted immediately, and playback is stopped (pause). Next, the operator resumes playback. When an operation is detected, the sound effect adding circuit 2 is initialized, the remaining sound effects generated in the previous playback are deleted, a newly set sound effect is added, muting of the audio output OUT is canceled, and playback is performed. The process of outputting the playback sound to which a new acoustic effect is added by starting.
[0013]
(B) As shown in FIG. 3, it is preferable to let the operator hear the reverberation of the music due to the addition of the sound effect when the reproduction of the music is completed up to the end of the music instead of the key input S by the operator. The reverberation such as reverberation added by the sound effect is output by stopping only the reproduction operation so as not to interrupt the sounding and the sound effect, and this sound effect addition control is output until a preset time (for example, 2 seconds after the reproduction ends) ) Or a process of continuing until the sound effect addition circuit 2 detects the completion of the DSP sound effect calculation.
[0014]
(C) As shown in FIG. 3, when the next song starts playing after the song is played instead of the key input S, the next song is played after the sound effect addition control of the previous song is finished. Is started, the sound effect adding circuit 2 is initialized at the playback start point, a newly set sound effect is added, muting is canceled, and playback of the next song is started.
[0015]
As described above, the control unit 7 controls the start and end of the sound effect adding circuit 2 and the muting control of the audio muting block 3 in conjunction with the playback control of the playback circuit 1. The signal reproduction apparatus 20 is provided with an acoustic effect according to the reproduction situation, and audio reproduction that is comfortable for the operator (listener) is realized.
[0016]
【The invention's effect】
Since the audio signal reproduction device according to the present invention is configured as described above,
(1) For the operator, there is an excellent effect that the start / end timing of adding a preferable acoustic effect is provided only by the operator operating the playback start or stop of the playback device.
(2) The sound effect of the previous song does not remain at the playback start point of the next song.
(3) The sound effect at the end of playback is not impaired.
[Brief description of the drawings]
FIG. 1 is a block circuit diagram of an audio signal reproduction device according to the present invention.
FIG. 2 is a flowchart of playback control and sound effect addition control when key input for playback stop and playback restart is sequentially performed.
FIG. 3 is a flowchart of playback control and sound effect addition control when playback is completed up to the end of a song instead of key input and when the next song is played back after the end of playback.
FIG. 4 is a block circuit diagram of an audio signal reproduction device including a control unit that controls a sound effect addition function by a conventional sound effect addition circuit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Playback circuit 2 Sound effect addition circuit 3 Audio muting block 4 Playback control part 5 Sound effect control part 7 Control part 10 and 20 Audio signal playback apparatus S Key input OUT Audio output

Claims (1)

A reproduction circuit of a reproduction sound source, an acoustic effect addition circuit for imparting an acoustic effect to an output from the reproduction circuit, an audio muting block for muting an audio output, and an acoustic effect addition function by the acoustic effect addition circuit In an audio signal reproduction device including a control unit for controlling,
The controller controls the audio muting block and mutes the audio output and stops the playback operation when any key input of (i) stop of music or transition to another music is made. in the allowed to release the muting by the audio muting block with adding a newly set sound effect to initialize the sound effect adding circuit by the reproduction start instruction time point of a new song, (ii) the key input When the reproduction of the music is finished, the reproduction operation is stopped and the sound effect addition control to the sound effect addition circuit is continued until a preset time or the completion of the sound effect addition of the sound effect addition circuit is detected. Then, the audio output is muted by the audio muting block, and (c) the key input When the next song starts to be played after the song has been played , the sound is added at the time when the next song is instructed to start playback after the sound effect addition control to the sound effect adding circuit in the previous song is finished. The effect adding circuit is initialized so as to add a newly set sound effect , cancel muting by the audio muting block, and then start the reproducing operation of the next song . An audio signal reproducing apparatus comprising means for controlling the start and end of the sound effect adding circuit and the muting of the audio muting block in conjunction with the reproduction control.

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