JPH0221481A - Reproducing control method for compact disk player - Google Patents

Abstract

PURPOSE:To improve operability at the time of reproducing music by migrating an operation to the reproduction of first music in case of operating a track search-up key in performing the reproduction of last music, and migrating it to the reproduction of the last music in case of operating a track search-down key in performing the reproduction of the first music. CONSTITUTION:A CPU3 judges whether or not the music in performing the reproduction is the last music when the track search-up key on an operating part 2 is operated in performing the reproduction of the music by the subcode of the music. And the operation is migrated to the reproduction of the first music in case of operating the track search-up key in performing the reproduction of the last music, and it is migrated to the reproduction of the last music in case of operating the track search-down key in performing the reproduction of the first music. Therefore, it is possible to set the functions of the track search-up and the track search-down keys at an endless format. In such a way, the operability at the time of reproducing the music can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a playback control method for a compact disc player used for music playback and the like.

"Prior Art" FIG. 3 is a block diagram showing a schematic configuration of a compact disc player (hereinafter referred to as a CD player). In this figure, reference numeral 1 indicates the mechanism of a CD player, which includes an optical pickup, a spindle motor, a servo circuit, a signal processing circuit, and the like. 2 is a play key that instructs the start of playback operation, a stop key that instructs to stop, a tincture that instructs the song number, a track search up key that instructs the start of the next song, and a start of that song or the start of the previous song. This is an operation section consisting of a track search down key and the like.

3 is CPU (Central Processi)
ng tJnit), and this CP tJ 3 reads the signal indicating the operation status of each key output from the operation unit 2, and also reads the TOC (Table Or
ContentS), and the subcode is read during song playback. Then, based on the read information, a control signal is output to the servo circuit of mechanism 1 of the CD player.

Note that TOC corresponds to the table of contents of a disc, and its contents include the track numbers of the first and last songs on the disc (usually the track number of the first song is "1"), A time code indicating the start time of each convex song on the disc and a time code indicating the end time of the last song are recorded. Also, what is a subcode?
This code is used to perform a function to find the beginning of a song, a program function to play songs according to a preset order, etc. In this subcode, a time code indicating the playing time of the two track numbers of the song, a time code indicating the cumulative playing time of each side, etc. are recorded.

In such a configuration, an example of the operation of the CPtJ3 when the tracking search up key and the tracking search down key are each operated will be described using the flowcharts of FIGS. 4 and 5. FIG. 4 is a flowchart when the track search up key is operated. When the track search up key of the operation unit 2 is operated during song playback, the CPU 3 first proceeds to step S1 and determines whether the song currently being played is the last song on the disc by checking the subcode of the song. Judgment will be made accordingly. If the result of this judgment is rY E S J, the routine exits without performing any processing. Also, if the judgment result in step Sl is “NO”,
”, the process advances to step S2.

In step S2, the subcode is searched to detect the beginning position of the next song, playback is started from that position, and this routine is exited.

FIG. 5 is a flowchart when the track search down key is operated. When the track search down key of the operation unit 2 is operated during song playback, the CPU 3 first proceeds to step S3 and calculates the time from the start of playback of the song until the track search down key is operated. Determine whether it is within 1 second. If the result of this determination is "NO", the process advances to step S4. In step S4, the subcode is searched to detect the beginning position of the song, playback is started from that position, and this routine is exited.

Further, if the determination result in step S3 is rY E S J, the process advances to step S5. In step S5, it is determined whether the song being played is the first song or not based on the subcode of the song. If the result of this judgment is rY E S J, the routine exits without performing any processing. Also, step S
If the determination result in step S6 is rNOJ, the process advances to step S6. In step S6, the subcode is searched to detect the beginning position of the previous song, playback is started from that position, and this routine is exited.

[4- Problems to be Solved by the Invention] By the way, in the above-mentioned conventional CD player, if you want to listen to the first song while the last song is being played, you have to go down one track at a time using the track search down key. Similarly, if you want to listen to the last song while the first song is being played, you have to use the track search up key to go up songs one by one, which is very cumbersome to operate.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a playback control method for a compact disc player that improves operability when playing music.

1-Means for Solving the Problems In this invention, when the track search up key is operated while the last song is being played, the playback shifts to the first song, and the track search down key is pressed while the first song is being played. The feature is that when operated, the playback shifts to the last song.

"Operation" According to the above invention, music is played back in an endless format. This improves operability.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to the flowcharts of FIGS. 1 and 2. The general configuration of a CD player according to an embodiment of the present invention is the same as that shown in FIG. 3. FIG. 1 is a flowchart showing the operation of CPtJ3 when the track search up key is operated. When the track search up key of the operation section 2 is operated during song playback, CPtJ3 first performs step S7. Proceeding to processing, it is determined whether the currently playing song is the last song on the disc based on the subcode of that song.The result of this judgment is
If YES, the process advances to step S8. In step S8, the subcode is searched to detect the beginning position of the first song, playback is started from that position, and this routine is exited. Further, if the determination result in step S7 is "NO", the process advances to step S9. In step S9, the subcode is searched to detect the beginning position of the next song, playback is started from that position, and this routine is exited.

FIG. 2 is a flowchart when the track search down key is operated. When the track search down key of the operation unit 2 is operated during playback of a song, the CPU 3 first proceeds to step SIO and calculates the time from the start of playback of the song until the track search down key is operated. Judge whether it is within one second. This judgment result is rNOj
If so, proceed to step Sll. In step 11,
The subcode is searched to find the beginning position of the song, playback starts from that position, and this routine exits.

Further, if the determination result in step SIO is rY E S J, the process advances to step S12. In step SI2,
It is determined whether the song being played is the first song or not based on the subcode of the song. If the result of this determination is rY E S j, the process advances to step S13. In step St3, the subcode is searched to detect the beginning position of the final song, playback is started from that position, and this routine is exited. Further, if the determination result in step S12 is rNOJ, step S1
Proceed to step 4. In step SI4, the subcode is searched to detect the beginning position of the previous song, playback is started from that position, and this routine is exited.

"Effects of the Invention" As explained above, according to the present invention, when the track search up key is operated while the last song is being played, the playback of the first song is started, and the track search is performed while the first song is being played. Since the playback of the last song is started when the down key is operated, the functions of the track search up key and track search down key can be made endless. As a result, if you want to listen to the first song while the last song is playing, you can simply use the track search up key to increase the track number without having to use the track search down key to decrease the song number one by one. Similarly, if you want to listen to the last song while playing the first song, you can use the track search down key to change the track number without having to use the track search up key to increase the track number one by one. You can play the last song just by down operation, and if you try to play a certain song while the song is playing, you can up/down the song number of the currently playing song depending on the song number of that certain song. Playback can be performed from a similar direction, thus improving operability when playing a song.

[Brief Description of the Drawings] Figures 1 and 2 are flowcharts showing the operation of the CPU 3 when the track search up key and track search down key are operated according to an embodiment of the present invention, and Figure 3 is a compact FIGS. 4 and 5, which are block diagrams showing a schematic configuration of a disc player (CD player), are flowcharts showing the operation of the CPU 3 when the conventional track search up key and track search down key are operated. Figure 1 Figure 2

Claims (1)

[Claims] If the track search up key is operated while the last song is being played, the playback will proceed to the first song, and if the track search down key is operated while the first song is being played, the transition will be to the last song. A playback control method for a compact disc player characterized by: