JP2682172B2 - Optical disc player - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc reproducing apparatus such as a compact disc player.

2. Description of the Related Art Conventional optical disc players of this type are shown in FIGS.
The configuration was as shown in the figure.

That is, 1 is a signal detection unit which is an optical pickup for reading music information and performance time information recorded on an optical disc (hereinafter simply referred to as a disc), and 2 is information processed by the signal detection unit to be an audio signal. A signal output unit 3 for converting and outputting is a control unit for controlling the signal detection unit 1 and the signal output unit 2, and a display unit 4 displays information such as reproduction time information read by the signal detection unit 1 via the control unit 3. The display unit 5 includes a play key 5a for instructing the control unit 3 to start reproduction,
This is a key switch unit including a reproduction music designation key 5b and the like for storing in advance the music to be reproduced in the control unit 3.

Then, with the above configuration, the control as shown in the flowchart of FIG. 6 has been performed.

That is, in the same figure, in step 1, it is judged whether or not a memory reproduction music piece has been designated. If it is designated, the processing moves to step 2; if not, the processing moves to step 3 where if the play key is pressed, it is recorded on the disc. Play songs in order from the beginning. In step 2, the designated music number is stored in the control unit 3. In step 3, it is determined whether or not the play key has been pressed. If it has been pressed, the process proceeds to step 4, and if it has not been pressed, the process returns to step 1. Therefore, steps 1 to 3 are repeated until the input of the stored and reproduced music is completed. In step 4, the music signal recorded on the disc is reproduced and output from the signal output unit 2. Step 5
Then, it is determined from the track information reproduced along with the music signal whether or not the song reproduced in step 4 has ended. If completed, the process proceeds to step 5, and if not completed, the process returns to step 4 and continues reproduction. . In step 6, it is determined whether or not the reproduction of all the reproduced music pieces is completed. If not completed, the process proceeds to step 7, and if completed, the process is completed. In step 7, it is judged whether or not the track number of the song played in step 4 and the track number of the song to be played next are continuous. If they are not continuous, the process proceeds to step 8 For example, return to step 4 and continue playback as it is. In step 8, the start position of the next reproduced music is accessed by the control unit 3.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Regarding the music signals recorded on the disc,
Often there is no sound in the first few seconds or the last few seconds of each track. In addition, when only the music to be listened to is stored in advance and reproduced, the music numbers are often not consecutive, and the operation of accessing the next music is performed each time the reproduced music ends. Therefore, in the above-described conventional configuration, in the reproduction output of the music signal, as shown in FIG. 7A, there is a portion of no sound for several seconds even when reproducing the continuous music. Further, as shown in FIG. 7b, in the case of a discontinuous tune, even if a sound is properly recorded from the beginning to the end of the tune, a mute is applied during access to the next tune, so that a real sound portion is always produced. Unless the disc was recorded live in this way, it was impossible to play it seamlessly from beginning to end. The present invention has been made in order to solve such a conventional problem, and detects a rhythm pitch of a music signal at the time of playing a disc and also detects a silent portion between songs, and when a silent portion is detected, the next song is detected. An optical system that generates a rhythm sound with the same pitch as the rhythm pitch of the song being played in the rhythm sound generation section until the music signal is output and outputs it from the signal output section so that there is no time during which there is silence during disc playback. It is an object to provide a disc reproducing device.

Means for Solving the Problems In order to achieve the above object, the present invention provides a signal detecting section for detecting information recorded on an optical disc, and a music piece being reproduced from the music information detected by the signal detecting section. A rhythm pitch detecting section for detecting a rhythm pitch, a rhythm pitch storing section for storing the detected rhythm pitch, and a silent inter-track detecting section for detecting a silent section between songs during disc playback,
When a silent section is detected, a rhythm sound generator that generates a rhythm sound until the music signal of the next song is output, the rhythm pitch of the song being played, and the rhythm pitch of the previous song stored in the rhythm pitch storage unit. Rhythm pitch control that gradually changes the pitch of the rhythm sound generated by the rhythm sound generation section from the pitch of the previous song to the pitch of the reproduced song according to the result of comparison by the rhythm pitch comparison unit And a section.

Operation The operation of the present invention by the above means is as follows. That is, the rhythm pitch of the song is detected during disc playback,
This is stored. At the moment when a silent portion is detected at the end of the song, a rhythm sound having the same pitch as the rhythm pitch of the song is started to be generated. Therefore, while the rhythm sound is being output, the beginning of the next song is played, the rhythm pitch of that song is detected, and the pitch of the rhythm sound is determined according to the result of comparison between that pitch and the stored rhythm pitch of the previous song. Gradually change until the pitch of the song being played is equal. Then, when the pitches of the rhythm sounds match, the reproduced music is reproduced and output from the place where the sound exists. By repeating this operation between songs, even when a disc having a silent portion between songs is played or when program playing is performed, it is possible to perform playback without a time during which the played sound is silent.

Examples Hereinafter, examples of the present invention will be described with reference to the drawings.

In FIG. 1, reference numerals 21 and 22 denote a signal detection section and a signal output section having the same functions as those of the conventional example, and 23 denotes a control section for controlling the signal detection section 21 and the signal output section 22. A pitch calculator 26, a silence interval detector 27 that detects a silent portion or a small signal portion between songs during disc playback, and a drum until the music signal of the next song is output when a silent portion is detected. Rhythm sound generator that generates rhythm sounds such as bass and bass
28 and. 24 is a display unit having the same function as the conventional example, and 25 is a play key 25 for instructing the control unit 23 to start reproduction.
a, a key switch section including a rhythm sync key 25b for instructing to generate a rhythm sound between silent songs.

The rhythm pitch calculator 26 is configured as shown in FIG. 2, and inputs the reproduced music information and detects the rhythm pitch from the input information. The rhythm pitch detector 31 stores the detected rhythm pitch. Section 32 and a rhythm pitch comparing section 33 for comparing the rhythm pitch of the song being played and the rhythm pitch of the previous song stored in the rhythm pitch storage section.
And a rhythm sound pitch control unit 34 for gradually changing the pitch of the rhythm sound generated by the rhythm sound generation unit from the pitch of the previous tune to the pitch of the reproduced tune according to the result of comparison by the rhythm pitch comparison unit. There is.

The operation of the embodiment of the present invention configured as described above will be described with reference to the flowchart of FIG.

Since steps 1 and 2 in FIG. 3 are the same as the operation of the conventional example, description thereof will be omitted. In step 3, it is determined whether or not the rhythm sync key 25b is pressed. If it is pressed, the process proceeds to step 4, and if not pressed, the process ends. In step 4, it is determined whether or not the play key 25a is pressed, and if it is pressed, the process proceeds to step 5,
If it has not been pressed, the process returns to step 1 to accept the input of the stored and reproduced music. In step 3, the CD recording control signal calculation unit 27 outputs a reproduction start signal to the CD control recording signal input / output unit 28 to inform the tape recorder II that the CD player has started reproduction. In step 4, the CD player control section 23 searches for the first tune to be reproduced and performs cueing. In step 5, the music signal recorded on the disc is reproduced and output from the signal output unit 22. In step 6, the rhythm pitch detecting section 31 detects the rhythm pitch of the reproduced tune and stores it in the rhythm pitch storing section 32. In step 7, it is determined whether or not the reproduction of the music being reproduced has been completed for a predetermined time. If the reproduction has been completed, the process proceeds to step 8 assuming that the end of the music has been approached. Go back and continue playing. In step 8, the silent interval detection section 29 searches for a silent part while continuing the reproduction, and when the silent part is searched, the process proceeds to step 9. In step 9, it is determined whether or not the reproduction of all the reproduced music pieces has been completed. If completed, the process proceeds to step 20, and if not completed, the process proceeds to step 10. In step 10, the rhythm sound generation unit 28 generates a rhythm sound such as a drum or bass and outputs it from the signal output unit 22. In step 11, the control unit 23 searches for the next piece of music to be reproduced and finds the beginning. In step 12, the rhythm pitch of the reproduced tune is detected by the rhythm pitch detection section 31 while the cueed tune is reproduced. In step 13, while comparing the rhythm pitch of the song being reproduced with the value stored in the rhythm pitch storage section 32 by the rhythm pitch comparison section 33, the rhythm sound generated by the rhythm sound generation section 28 by the rhythm sound pitch control section 34. Set the pitch control value of the sound. In step 14, the rhythm sound pitch control section 34 gradually changes the pitch of the rhythm sound according to the value set in step 13 until it becomes equal to the pitch of the music being reproduced. In step 15, the tune being reproduced at this time is cued. In step 16, the disk is reproduced and output as in step 5. In step 17, the inter-silent song detection control section 27 performs a level search by comparing a reproduction signal with a predetermined reference level of the music signal. In step 18, it is determined whether or not the music signal has become equal to or higher than the set level, and if so, the process proceeds to step 19, and if it is smaller than the set level, the process returns to step 17 to continue the level search. In step 19, the output of the rhythm sound generated by the rhythm sound generating section 28 is stopped, and the process returns to step 5 to continue the reproduction output. In step 18, the music being reproduced is reproduced to the end.

As described above, according to the present embodiment, the rhythm pitch detecting section 31 detects the rhythm pitch of the music piece while the disc is being reproduced, and stores this in the rhythm pitch storing section 32. When the silent section is detected by the silent section detecting section 27 at the end of the song, the rhythm sound generating section 28 generates a rhythm sound having a rhythm pitch equal to the value stored in the rhythm pitch storing section 32, and the signal outputting section 22.
Output more. As shown in FIG. 4, when the track numbers (TNO) of the reproduced music are continuous, the disk is continuously reproduced, and when the TNO is not continuous, the next reproduced music is accessed and the reproduction is continued. Then, the rhythm pitch is detected again from the point where the TNO has changed, the pitch detected at that time is compared with the pitch stored in the rhythm pitch storage section 32 in the rhythm pitch comparison section 33, and the rhythm is based on the result. The sound pitch control section 34 controls the pitch of the rhythm sound generated by the rhythm sound generation section 28, and gradually changes it until it becomes equal to the pitch of the music being reproduced at that time. When this pitch becomes equal, access and play the beginning of the song,
When it becomes a signal of a predetermined signal level by the silent interval detector 27, the output of the rhythm sound is stopped and the reproduction output of the disc is started. In this way,
Even when reproducing a disc having a silent portion between songs, it is possible to perform reproduction without interruption of sound. Also,
If a clapping sound is used as the rhythm sound, it can be reproduced like a live-recorded disc.

EFFECTS OF THE INVENTION As is clear from the above embodiments, the present invention determines the rhythm pitch of the music being reproduced from the signal detecting section for detecting the information recorded on the optical disc and the music information detected by the signal detecting section. Rhythm pitch detection section to detect, rhythm pitch storage section to store the detected rhythm pitch, silent section detection section to detect the silent section between songs during disc playback, and the next song when a silent section is detected A rhythm sound generation unit that generates a rhythm sound until a music signal is output, a rhythm pitch comparison unit that compares the rhythm pitch of the song being played with the rhythm pitch of the previous song stored in the rhythm pitch storage unit, and a rhythm A rhythm sound pitch that gradually changes the pitch of the rhythm sound generated by the rhythm sound generation unit from the pitch of the previous tune to the pitch of the reproduced tune according to the result of comparison by the pitch comparison unit. It is provided with a switch control section, and even when a disc having a silent portion between songs is played back or a program is played back, playback can be performed without a time during which the playback sound is silent.

[Brief description of the drawings]

FIG. 1 is a block diagram of an optical disc reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of its main portion, FIG. 3 is a flow chart for generating and outputting a rhythm sound of the apparatus, and FIG. Waveform diagram showing the reproduction output state of the music signal of the device,
FIG. 5 is a block diagram of a conventional example, FIG. 6 is the same flowchart, and FIG. 7 is a waveform diagram showing a reproduction output state of a music signal of the conventional example. 21 …… Signal detection unit, 27 …… Silent song deletion control unit, 28 ……
Rhythm sound generation section, 31 rhythm pitch detection section, 32 rhythm pitch storage section, 33 rhythm pitch comparison section, 34
Rhythm sound pitch control section.

Claims (3)

(57) [Claims] 1. A signal detecting section for detecting information recorded on an optical disc, and a rhythm pitch detecting section for detecting a rhythm pitch of a music piece being reproduced from music information detected by the signal detecting section. Rhythm pitch storage section that stores the rhythm pitch, silent section detection section that detects silent sections between songs when playing a disc, and when a silent section is detected, a rhythm sound is generated until the music signal of the next song is output Optical disc having a rhythm sound generation section for controlling the rhythm sound generation section and a rhythm sound pitch control section for controlling the pitch of the rhythm sound generated by the rhythm sound generation section to be the same as the value stored in the rhythm pitch storage section. Playback device. 2. A rhythm pitch comparing section for comparing a rhythm pitch of a song being reproduced with a rhythm pitch of a previous song stored in a rhythm pitch storage section, and a rhythm sound according to a result of comparison by the rhythm pitch comparing section. The optical disc reproducing apparatus according to claim 1, further comprising: a rhythm sound pitch control unit that gradually changes the pitch of the rhythm sound generated by the generating unit from the pitch of the previous music piece to the pitch of the reproduced music piece. 3. The optical disc reproducing apparatus according to claim 1, further comprising a clap sound as a sound generated by the rhythm sound generating section.