JPH0422465Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording disk reproducing apparatus, and more particularly to a recording disk reproducing apparatus that controls performance operations using control signals recorded on a digital audio disk.

A schematic block diagram of such an apparatus is shown in FIG. 1, in which recorded information on a digital audio disk 1 which is rotationally driven by a spindle motor 2 is read by an optical pickup 3. This pick-up 3 contains a laser diode, an objective lens, a focus actuator, a tracking actuator, and a photodetector. The output of the pick-up 3 is input to each of a focus servo circuit 4, a tracking servo circuit 5, and a phase comparator circuit 8 including an RF amplifier. The focus actuator in the pickup is driven accordingly.
The tracking servo circuit 5 generates a tracking error and sends this error component to the tracking actuator in the pickup and the pickup feed servo circuit 6. The output of the pick-up feed servo circuit 6 causes the pick-up 3 to be sent in the radial direction of the disk 1.

The phase difference between the reproduced clock signal obtained by the phase comparison circuit 8 and the reference clock signal from the clock generation circuit 14 is detected in the spindle servo circuit 7, and the reproduction clock signal is sent to the spindle motor 2 so that the track linear velocity of the recording disk 1 is constant. is driven.
The output of the phase comparison circuit 8 includes a frame synchronization circuit.
The signal is supplied to an EFM (Eight to Fourteen Modulation) demodulation circuit 9, and the demodulated output is processed by a data processing circuit 10 that performs deinterleaving, error detection, correction, correction, etc. of the demodulated data signal. Thereafter, the data is temporarily stored in the data memory 11 and read out using a constant cycle clock signal from the clock generation circuit 14 as a D/A (digital/analog).
The converter 12 converts the signal into an analog signal. This analog signal is passed through LPF (low pass filter) 13
The left and right audio signals are outputted via the left and right audio signals.

On the other hand, the control signal in the data from the demodulation circuit 9 is supplied to the system controller 15,
Various information such as during a song, between songs, song number, frame number, and playing time can be read. This system controller 15 is made up of one or more microcomputers, and controls the key input from the operating section 17, the output to the display 18, and the entire system including each servo system and data processing system. Note that 16 is a RAM (random access memory) that stores information from the system controller 15.

FIG. 2 shows one aspect of the P channel and Q channel for various control signals recorded on the above-mentioned digital audio disk. P channel “0” distinguishes between songs and between songs.
(during a song), "1" (between songs), but if the source song interval is 2 seconds or less, the "1" indicating the P channel song interval is always held at 2 seconds. . In this case, for example, as shown between songs 2 and 3, since the previous song 2 changes from “0” to “1”, the signal between the source songs and the “1” of the P channel are not necessarily the same. They do not match on the time axis.

In addition, the Q channel has MNR (music number) and X (phrase number) as song identification numbers for songs and phrases in songs.
Since the MNR is divided and numbered in areas including the inter-musical interval preceding the performance musical piece, a signal can be obtained at the start of the inter-musical interval, but at the end of the inter-musical interval (at the start of the performance)
cannot be determined. In X, "00" is provided between source songs, and "01" is provided at the beginning of the song.
For songs that have multiple phrases, the X's are numbered sequentially, making it possible to identify the start, end, and phrase breaks between songs.

In the playback device shown in FIG. 1, when performing a song selection operation to play a desired song, the system controller 15 receives a specified song key input from the operation unit 17, and controls the Q of the control signal from the demodulation circuit 9.
The MNR of the channel is read and a command is sent to the pick-up feed servo circuit 6 and the spindle servo circuit 7 so that the pick-up accesses the beginning position of the MNR of the specified song, thereby selecting a song.

Next, the display contents of the display 18 will be explained. In the lead-in area of recording disk 1, there is a so-called TOC (Table
Of Contents) time information is recorded, and at the time of lead-in of the pick-up, this time information is read by the pick-up and sent as a control signal to the system controller 15, and is sent to the RAM
16.

On the other hand, by reading and specifying each of the above-mentioned time information by key input on the operation section 17, the read time information is displayed on the display 18 as minutes, seconds, or frames. Also,
Also in the program area, the elapsed time within the song and the start time information counted from the start of the first song are recorded, and similarly, during the performance, this time information is read by the pick-up and sent to the system controller 15. Processed. Therefore, based on input commands from the operation unit 17, the display 18 displays the elapsed time and remaining time of the current song obtained through these calculation processes, as well as the current elapsed time and remaining time from the start of the first song. I'm starting to get it. below,
The performance time calculated from the TOC time information or the time information within the program area is called the calculated performance time. Incidentally, the above-mentioned control signal also includes absolute address information (position information), so that it is also possible to display the recording position of each song, the pick-up position, etc.

Since the conventional apparatus is configured as described above, it simply displays the time information and position information recorded on the recording disk as is, and has the disadvantage of lacking display diversity. In addition, when selecting a program, the pick-up access time for each song is different, and the recording disk has an inter-song time set by the disk software manufacturer as described above, so the total inter-song time including the above access time is This is not constant depending on each playback device, each disc, and each song, and there is a drawback that the total program performance time, remaining time, etc. cannot be displayed accurately.

An object of the present invention is to provide a recording disk reproducing apparatus which improves the above-mentioned drawbacks of the conventional apparatus. The feature is that it is a disk player that plays a recording disk on which multiple songs (or phrases, the same shall apply hereinafter) are recorded together with song identification numbers, and it is a disk player that plays a recording disk in which multiple songs (or phrases, the same shall apply hereinafter) are recorded together with song identification numbers. a designation means for designating a silent period before the performance of a song starts; a music start detection means for sequentially detecting the beginning of a song according to the performance order specified by the designation means; and a timer for measuring the time at the end of the performance of one song. a timing means for starting;
The present invention further includes pause command means for instructing a pause operation after the song start detection means detects the beginning of the next song until the time measurement means measures the silent time.

The present invention will be explained below using the drawings.

The configuration block of the device according to the present invention is almost the same as that shown in FIG. 1, but an operation key section is added to the operation section 17 that allows specifying and inputting the inter-song time and phrase pause time from the outside. . Further, a timer circuit as a time measuring means operated by the control signal obtained by the demodulation circuit 9 and the clock signal of the clock generation circuit 14 is built into the system controller 15.

Next, the operation of the present invention will be explained using FIGS. 3 and 4. FIG. 3 is a diagram showing an example of a recording mode on a disk, and FIG. 4 is a timing chart showing an example of a reproduction mode of the disk.
In this example, from Music3 in program play mode.
The figure shows the case where the inter-musical time is set to T ₁ when changing to Music 2, and the pause time between phrases during Music 2 is set to T ₂ .

First, in the operation section 17, the third song → song interval T ₁
The song selection order, inter-song time, and pause time are inputted using the keys, respectively, and sent to the system controller 15, such as seconds → second song/phrase ₁ → pause T 2 seconds → second song/phrase ₂ → pause T 3 →. With this program instruction, the system controller 15
Point A, where Music3's performance ends, on the Q channel.
Detects the change in MNR and starts timer counting. At the same time, the audio output is turned on, and the tracking servo circuit 5, the pick-up feed servo circuit 6, and the spindle servo circuit 7 are forced into fast forward mode (in the opposite direction) to move the pick-up 3 to point B, which is the starting position of Music 2. to access. This point B position is detected at the falling timing of the P channel from 1 to 0 in Music2.

Thereafter, the timer continues counting, but at point B, the tracking servo circuit 5 is turned off, the spindle servo circuit 7 is controlled to the normal operating state, the pickup 3 is temporarily stopped, or paused, and the next song is in a standby state. Then, when the timer count reaches the specified T ₁ seconds, the timer is reset and the audio output is turned off.
Music2 with tracking servo circuit 5 on
Phrase 1 starts playing.

Next, when the performance of phrase 1 is finished, the timing of a change from 01 to 02 in X of the Q channel is detected at the C point position, and a timer count is started. At the same time, the audio output is turned on, the tracking servo is turned off, and the pickup 3 is stopped. Phrase pause time with timer specified
When T ₂ seconds is reached, the timer is reset again, the audio output is turned off, the tracking servo is turned on, and Phrase 2 of Music 2 starts playing.
However, if there is a change from any phrase number in the previous song to inter-song phrase number "00" of the next song, or if there is a change from inter-song phrase number "00" to phrase number "01" in the same song, Since it is not a phrase break, it is assumed that the configuration is such that even if there is a change in X, it is ignored and the above-mentioned pause action is not performed.

In this way, the operation timing of the playback device can be controlled as desired by key input operations and control signals for the P and Q channels, so it is possible to arbitrarily set the inter-musical time and phrase pause time. However, the time between songs can be set arbitrarily as long as it is longer than the access time determined by the playback device.

In the above embodiment, blank time and pause time are inserted between songs and phrases in the program performance mode, but blank time can also be inserted between songs and phrases in the normal performance mode. The same can be applied to the case of insertion. In normal performance mode, when transitioning from Music 1 to 2 in Figure 2, Q
The tracking servo circuit 5 and spindle servo circuit 7 are controlled to a forced (forward) fast forward operation state by changing the MNR of the channel, and at the falling timing of the next P channel from 1 to 0, the pickup is stopped and the next song standby ( All you have to do is pose (pose). Furthermore, even if there is no interval between songs on the source side, as in Music 3 to 4, it is sufficient to stop the pickup at the position where the MNR of the Q channel changes and standby for the next song.

Next, the display on the display 18 will be explained. For example, if you input an inter-music time of 4 seconds from the inter-musical time and phrase pause time designation keys on the operation unit 17, the key input signal is stored in the RAM 16 via the system controller 15, and the inter-musical timer is set to 4 seconds. Set to . When the pickup 3 performs a lead-in, each song performance time in the lead-in area is read into the system controller 15 by a control signal. In the case of normal performance, the sum of the calculated performance time of all songs on the disk and the specified inter-song time of 4 seconds multiplied by the number of songs - 1 becomes the total performance time, that is, the actual performance time, and the system controller 15 calculates these. is displayed on the display 18.

Similarly, the program performance time is the total calculated performance time of the specified songs, plus the number of specified songs minus 1 for the inter-song time of 4 seconds.
The sum of the multipliers becomes the actual performance time and is displayed. Incidentally, even when the phrase pause time is specified, the same calculation process is performed to obtain the actual performance time.

In addition, in the program area, the elapsed performance time from the first song during a performance is displayed by reading the elapsed time within the performance song from the control signal, and comparing the total calculated playing time up to the previous song and the inter-song time of 4 seconds. It can be obtained by multiplying the number of played songs up to the song by 1. Furthermore, the present invention can be similarly applied to specifying the remaining time by subtracting the elapsed time from the actual performance time.

In addition, when displaying the elapsed time, remaining time, etc., in addition to reading and calculating the elapsed time within a song from the control signal from the program area, a timer counter that counts the clock signal obtained from the clock signal generation circuit 14 is also used. When the first song starts playing, the timer can be activated and counted to display the current elapsed time and remaining time.

As described above, according to the present invention, the pause operation is performed based on the externally specified inter-musical time and phrase pause time, so accurate display can be achieved not only during normal performance but also during program performance. Furthermore, when dubbing a recording disk source onto a tape or the like, it becomes easy to compare the recording time with the tape recording time, and it becomes possible to edit the tape to have a desired inter-track time.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a recording disk playback device.
FIG. 2 is a diagram illustrating the format of various recording signals on the recording disk, FIG. 3 is a diagram showing the format of various recording signals on the recording disk for explaining an embodiment of the present invention, and FIG. 4 is a diagram illustrating the format of various recording signals on the recording disk. It is a timing chart explaining the operation of the embodiment. Explanation of symbols of main parts, 1...recording disk,
3...Pickup, 15...System controller, 17...Key input section, 18...Display device.

Claims (1)

[Scope of utility model registration request] A disk player that plays a recording disk on which a plurality of songs (or phrases, the same shall apply hereinafter) are recorded together with song identification numbers, and the order in which the songs are played and the silence from the end of playing one song to the start of playing the next song. a designation means for designating a time; a music start detection means for sequentially detecting the beginning of a song according to the performance order designated by the designation means; a timekeeping means for starting time measurement at the end of the performance of one song; 1. A recording disk reproducing apparatus comprising: a pause command means for instructing a pause operation after the beginning of a song detecting means detects the beginning of the next song until the time measuring means measures the silent time.