JP2541057B2 - Disk unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device, and more particularly to a disc device having a function of finding a predetermined portion of a predetermined information program of a disc on which a plurality of information programs are sequentially recorded.

[0002]

2. Description of the Related Art In a compact disk (CD) player used in a broadcasting station or the like, for example, reproduction is performed from a predetermined moment of a predetermined music piece of a CD on which a plurality of music pieces are recorded or a predetermined part of the predetermined music piece. So-called cueing is performed. A function generally provided in a consumer CD player or the like is generally called "cueing", and is performed by automatically detecting a discontinuous portion of sound. However, in the case of live broadcasting, especially in the case of live broadcasting, it is necessary to perform certain and accurate cueing, so after performing the above-mentioned general cueing, further direct confirmation with the human ear is possible, and further accuracy is aimed at. For this reason, a fine adjustment operation is performed in units of one frame (the time required for reproduction is 1/75 second) using a jog dial or the like.

For this purpose, in the conventional CD player, for example, in the recording track 102 of the CD 101 shown in FIGS. 6 and 9A, when the pause operation is performed, the position 11 of the pickup head at that time (hereinafter referred to as the position 11). The position is called “pause point” from the pickup head to the position of 12 (one frame (9 to 22 frames),
(The time required for playback during that time is 9/75 to 22/75 seconds)
Will be returned. Further, the sound recorded between the pause point 11 and the position 12 which is one track back from the pause point 11 to the pause point 11 is repeatedly reproduced (hereinafter, such a state is referred to as a "pause state"). During this time, the operator performs a fine adjustment operation while listening to the reproduced voice. This fine adjustment operation means one frame of a CD track (the time required for reproduction is 1 before and after the pause point 11).
/ 75 seconds). By this fine adjustment operation, it becomes possible to adjust the pause point 11 to a predetermined position with high accuracy.

Next, after the pause point 11 is adjusted to a predetermined position by the above fine adjustment operation, the voice is reproduced from the pause point 11 at a predetermined timing due to the circumstances of the broadcast program, and this is broadcast (hereinafter referred to as "on air"). Name).

However, in the above-mentioned conventional CD player, when the pause release operation is performed from the paused state to reproduce from the predetermined pause point 11, for example, the pickup head is located near the position 12 one track back from the pause point 11. If there is, it is possible to reproduce from the predetermined pause point 11 only after moving the pickup head from that position to the pause point 11. Therefore, since the timing of reproduction is delayed while the pickup head is moved from the position 12 to the pause point 11, a silent state occurs during that time (so-called "rotation wait"). Although the above time is short, this delay may be a problem at broadcasting stations and the like.

In order to solve the above problem, a CD player using a storage element DRAM (dynamic random access memory) having a large capacity and a very short access time as a buffer (hereinafter referred to as "ram buffer") has been developed. In this CD player, the audio data input from the pickup head is temporarily recorded in the ram buffer, and the audio data corresponding to the pause point recorded in the ram buffer is read when the pause cancel operation is performed.

The operation of the CD player using the ram buffer will be described with reference to FIGS. 7, 8 and 9B. In this case, when the pause operation is performed, the pause point 11
Thereafter, audio data of 75 frames (represented by 53 in FIG. 9B and required for reproduction is 1 second) is written in the ram buffer 103. 13 in FIGS. 7 and 9B is the last position of this 75 frame. Also, the RAM buffer 103 has 7
When 5 frames have been written, the pickup head is returned by 1 track to positions 13 to 15 in FIG. In the pause state that continues after that, 45 frames after the pause point 11 (reproduction time is 0.6
Second) voice data is repeatedly read.

In FIG. 8, the RAM buffer 103 is a DRA of 8 kilobytes, that is, FFFF (hexadecimal number, the same applies below) bits.
It is composed of M, on which audio data of approximately 1.5 seconds can be written. Audio data for 75 frames of the CD is written in the ram buffer 103 from the 0-bit position at the left end of FIG. This 75-frame data corresponds to AC44 bits. Further, in the paused state, 45 frames of audio data are repeatedly read out. The data of 45 frames corresponds to approximately 6800 bits.

By performing the fine adjustment operation as described above in the paused state, the pause point 11 is adjusted to a predetermined position. When the fine adjustment operation is completed, the pause release operation is performed at a predetermined timing and the air is put on air. When the pause cancel operation is performed, the ram buffer 1
The audio data written in 03 is read from 0 bits at the left end of FIG. As is well known, since the DRAM that constitutes the RAM buffer 103 has a very short access time,
The time delay from the pause canceling operation to the actual reading of the audio data can be very small. Therefore, the silent state waiting for the rotation hardly occurs.

[0010]

However, in the CD player using the ram buffer 103 having the above structure,
The data repeatedly read from the ram buffer 103 in the paused state is the data corresponding to the portion after the pause point 11 (in FIG. 9B, the CD track 102).
(From pose point 11 to position 14). On the other hand, in the method described with reference to FIG. 6 in the CD player which does not use the conventional ram buffer 103, the portion of the CD 101 before the pause point 11 (from the position 12 of the CD track 102 to the pause point 11 in FIG. 9A). Will be played repeatedly. As described above, in the above two methods, the positional relationship of the portion of the CD 101 repeatedly read or reproduced in the pause state with respect to the pause point 11 is different.

Since many CD players generally reproduce the portion before the pause point 11 repeatedly, many operators are accustomed to handling such a CD player. When the method is used, the operation feeling of the operator is inconsistent with that before, and thus the operation may be hindered.

The present invention has been made in view of the above-mentioned problems, and eliminates the silent state due to the waiting for rotation, and has a feeling of operation most of the previous pause functions (information programs recorded on a CD by the pause operation. It is an object of the present invention to provide the same disc device as that for a CD player having a function of replaying a predetermined portion repeatedly and replaying from a pause point by a pause canceling operation, and so on.

[0013]

FIG. 1 is a block diagram showing the principle of the present invention. According to the first aspect of the invention, in the figure, the writing means 2 uses the position of the pickup head 4 on the disk 1 at the time of the pause operation as a pause point to obtain the data for the first and second lengths before and after the pause point. Each time the pause point is moved and reproduced, the data for the first and second lengths recorded on the disc 1 before and after the new pause point is reproduced and reproduced by the storage means. Update the write data to 3. The reading means 5 repeatedly reads the data of the first length before the pause point out of the data written in the storage means 3, and the pause point of the data written in the storage means 3 when the pause cancel operation is performed. The second length of data thereafter is read out.

According to a second aspect of the present invention, in FIG. 1, the writing means 2 reproduces the data for the second length after the pause point by the ready operation and writes it in the storage means 3.
The reading means 5 is configured to read the data for the second length after the pause point written in the storage means 3 by the pause canceling operation.

According to a third aspect of the invention, there is provided a disk drive means for rotating the disk, a pickup head, and
It is configured by a pickup head drive means, a pickup head drive control means, a storage means, a writing means, a repetitive reproducing means, and a reading means. The writing means writes the data after the pause point on the disk reproduced by the pickup head to the storage means by the pause operation, the repeat reproducing means repeatedly reproduces the data before the pause point, and the reading means by the pause canceling operation. The data written in the storage means is read out.

[0016]

In the present invention, since the repeatedly read data is the data corresponding to before the pause point, the operation feeling is the same as that of the conventional disk device having most of the pause functions. Further, by applying the storage means 3 having a short access time, it is possible to shorten the time delay from the pause cancel operation to the actual reading of the required audio data.

[0017]

2 is a block diagram of a compact disc (CD) player which is an embodiment of a disc device according to the present invention. In the CD player 100 shown in the figure, the audio data recorded on the CD 101 (disc 1) is read via the pickup head 104 (pickup head 4). Audio data as optical information read by the pickup head 104 is converted into a predetermined electric signal via the signal processing circuit 105 (the writing means 2).

A gate array type LSI ("Large Scale Integrated", hereinafter the same) 107 controlled by the microcomputer 106 (the writing means 2, the reading means 5, the repetitive reproducing means) 107 (the writing means 2, the reading means 5, The repetitive reproduction means) transmits the audio data input from the signal processing circuit 105 to the ram buffer 1.
03 (said storage means 3, repeated reproduction means). The RAM buffer 103 is substantially the same as the DRAM described in the section of the prior art. The audio data written in the RAM buffer 103 is the LSI 1
It is read by 07 and transmitted to the digital / analog conversion circuit 108 (the reading means 5, the repetitive reproducing means). This digital / analog conversion circuit 108
The digital voice information is converted into analog voice information and output.

The microcomputer 106 is operated by an operator via the control panel 109. The pickup head 104 is a CD driven by a motor 104a (the pickup head driving means) controlled by an LSI 107a (the pickup head driving control means).
The CD 101 is driven by the radius method of the CD 101 to search for a predetermined address.

Referring to FIG. 3, the CD player 10 having the above structure
The reproducing operation in the normal state before the pause operation is performed at 0 will be described. In FIG. 1A, reference numerals 31 and 32 respectively indicate the position of the pickup head 104 of the track 102 of the CD 101 and the position of the track 102 of the CD 101 corresponding to the audio data read by the pickup head 4 and written in the ram buffer 103. In FIG. 3B, 41 and 42 respectively indicate the ram buffer 103.
The positions in the ram buffer 103 of the write pointer for writing data and the read pointer for reading the data written in the ram buffer 103 are shown.

Track 1 of CD 101 as shown in FIG.
The audio data 02 is sequentially read by the pickup head 104 and written in the ram buffer 103. The position 42 of the read pointer of the RAM buffer 103 is a position delayed by a predetermined length from the position 41 of the write pointer, and always follows with a fixed interval. Therefore, the read audio data is the CD 101 of the pickup head 4.
Audio data corresponding to a position 32 delayed by a predetermined length from the position 31 on the track 102.

Further, the write pointer in FIG. 3B moves to the right in the figure, and when it reaches the right end of the ram buffer 103, it is returned to the left end in the same figure, and from the left end to the previously written data. Write new voice data to. As described above, the read pointer follows the write pointer with a delay of a predetermined length.

Next, the operation following the pause operation when the pause operation is performed in the normal state will be described with reference to FIG. When a pause operation is performed, first, the microcomputer 106 causes the pickup head 104 C at this time to move to C.
The position of D101 on the track 102, that is, FIG.
The address data written at the position of the pause point 11 is read and stored.

15 frames before the pause point 11 (the second time, the time required for reproduction is 0.2 seconds)
Pickup head 4 is moved to position 16. Then, the audio data of the CD is read from this position 16 via the pickup head 104, and this audio data is read by the write pointer to the first 1 of the ram buffer 103.
Start writing from the bit. The subsequent 75 frames (reproduction time is 1 second) of audio data is stored in the ram buffer 10.
Write to 3 sequentially.

Reference numeral 17 in FIG. 4A is the last position of the 75 frames. When 75 frames have been written in the ram buffer 103, the pickup head 104 is returned by one track to positions 17 to 18 in FIG. In the subsequent pause state, of the audio data written in the RAM buffer 103, 15 frames are returned from the pause point 11 to 15 frames from the pause point 11 to the pause point 11 (reproduction time is 0.2 seconds). The audio data corresponding to is repeatedly read.

At this time, the pickup head 104 is the last portion written in the ram buffer 103, the CD 10.
The track 102 corresponding to one track from position 1 to position 17 of 1 is repeatedly searched for in preparation for the pause canceling operation. The above operation is similar to the pause state of the CD player having the pause function which does not use the conventional ram buffer 103. However, at this time, the pickup head 10
4, the voice data is not read, but only the search for the corresponding address data on the CD 101 is repeated.

In FIG. 4B, the ram buffer 103 is composed of a DRAM of 8 kilobytes, that is, FFFF (hexadecimal number, the same applies below) bit, and approximately 1.5 seconds of audio data can be written therein. Audio data for 75 frames of the CD 101 is written to the ram buffer 103 from the 0-bit position at the left end of FIG. This 75
The frame data corresponds to AC44 bits. In the paused state, the audio data from 0 to 15 frames are repeatedly read out. The data of 15 frames corresponds to approximately 2300 bits.

By performing the fine adjustment operation (the movement operation) as described above in the paused state, the pause point 11 is adjusted to a predetermined position. Figure 5 shows CD10
One track 21 of one track 102 ends and the next music 22 starts. In the above operation, positions 16 to 75 15 frames before the pause point 11
The audio data of the CD1 up to the position 17 after the frame (the data of the first length and the data of the second length, the data of 51 and 52 in the figure, respectively) is the ram buffer 10.
Written in 3. Further, in the paused state, the voice data (data for the first length, which is data 51 in the figure) written in the ram buffer 103 from the position 16 to the pause point 11 is repeatedly read. In this state, the position of the pause point 11 is accurately adjusted to the start position of the music 22 by the fine adjustment operation.

When the fine adjustment operation is performed and the position of the pause point 11 is displaced, the same operation as that when the pause operation is performed, that is, the pickup head 4 moves from the new pause point 11 to 15 frames. The frame buffer 10 is returned and its position 16 to 75 frames are returned.
The operation of writing from the first first bit of 3 is performed. Further, the audio data written in the ram buffer 3 from the position 16 15 frames before the new pause point 11 to the new pause point 11 is repeatedly read.

When the fine adjustment operation is completed, the pause releasing operation is performed at a predetermined timing as described above. When the pause cancel operation is performed, the read pointer is moved to the position of the 15th frame of the RAM buffer 103 almost instantaneously based on the address data stored in the microcomputer 106, and after 2300 bits in FIG. 4B. The audio data (data of the second length, which is data 52 in FIG. 5) written in is read. At this time, the pickup head 104 starts searching for the position of the 60th frame after the pause point 11 on the track 2 of the CD 101.

As described above, in order to search the position of the CD 101 on the track 102 by the pickup head 104,
It takes time for the pickup head 104 to search for a maximum of one track. However, in this embodiment, the audio data from the pause point 11 to the 60th frame has already been written in the ram buffer 103. Therefore, while the written voice data is being read, the pickup head 104
It suffices to complete the search for the position from the pause point 11 to the 60th frame and thereafter. When this search is completed, it is possible to shift to the normal state described with reference to FIG. 5, and thereafter the reading of the audio data in the normal state is continued.

As is well known, since the DRAM constituting the RAM buffer 103 has a very short access time, the time delay from the pause cancel operation to the actual reading of the audio data can be very small. Therefore, the silent state waiting for the rotation hardly occurs. Therefore, the audio data written in the ram buffer 103 after the pause point 11 aligned with the start position of the music 22 is read almost instantly.

Since the portion of the CD 101 that is repeatedly read is 15 frames before the pause point 11, the operation feeling is the same as that of most conventional CD players having the pause function, and the CD using the ram buffer is used.
It is possible to solve a problem in using the player.

A CD player having the configuration described below as the second embodiment of the present invention may be used. The operation at the time of the pause operation is similar to that of the conventional CD player which does not use the ram buffer, that is, as shown in FIGS. 6 and 9A, the data for one track before the pause point 11 (for the first length). Play repeatedly. Therefore, in the case of the second embodiment, the repetitive reproducing means corresponds to the pickup head 104, the motor 104a, and the servo LS in FIG.
I107a, microcomputer 106, LSI10
7 and the D / A conversion circuit 108.

Next, when the pause point 11 can be accurately set to the beginning of the music by the fine adjustment operation (movement operation), the ready operation is performed. By this ready operation, the pickup head 104 searches for the pause point 11 on the CD 101, and the audio data after the pause point 11, that is, the audio data starting from the beginning of the song is 60 frames from the first bit of the ram buffer 103 (the second Is written). After that, the read pointer of the RAM buffer 103 is returned to the first bit and waits.

When the pause canceling operation is performed at a predetermined timing, the read pointer instantly reads the 60 frames of audio data written in the RAM buffer 103 from the beginning thereof. At this time, the pickup head 104 is at the pause point 1 on the track 2 of the CD 101.
The search for the positions of the 1st and 60th frames is started.

As described above, in order to search the position of the CD 101 on the track 102 by the pickup head 104,
It takes time for the pickup head 104 to search for a maximum of one track. In the present embodiment, the audio data from the pause point 11 to 60 frames has already been transferred to the ram buffer 103.
Since the audio data written in the RAM buffer 103 is read out, the pickup head 104 has only to complete the search for the position after the 60th frame from the pause point 11. When this search is completed, the normal state in the case of the first embodiment described with reference to FIG. 5 is entered, and thereafter the reading of the audio data in the normal state is continued.

With such a configuration, the state of the pause operation is C without using the conventional ram buffer 103.
Since the operation feeling is exactly the same as that of the D player, the data corresponding to the audio data from the pause point 11 is instantly read out after the pause is released, so that no time delay occurs.

The present invention is not limited to the above-described embodiment, and for example, a dedicated storage element is provided as a unit corresponding to the repetitive reproducing means, and the data before the pause point is written in this storage element and repeatedly read from there. Repeated reproduction is carried out by the data, and the data after the pause point is written in the ram buffer 103 in the same manner as in the above-mentioned embodiment and the ram buffer 1 is operated by the pause cancel operation.
The data after the pause point may be read from 03.

Needless to say, the present invention can be applied not only to a CD player, but also to a reproducing apparatus and a recording / reproducing apparatus which use other disc-shaped information media.

[0041]

As described above, according to the present invention, since the operation feeling is the same as that of the conventional CD player having most of the pause functions, the operability can be improved and the operation for releasing the pause can be realized. In addition, since the time delay until the required audio data is reproduced can be shortened, a silent state does not occur during on-air, and the function can be improved.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a block diagram of a CD player of an embodiment of a disc device according to the present invention.

FIG. 3 is a diagram showing a reproducing operation in a normal state of a CD player of an embodiment of the disc device according to the present invention.

FIG. 4 is a diagram (No. 1) showing an operation relating to a paused state of a CD player of an embodiment of a disc device according to the present invention.

FIG. 5 is a diagram (No. 2) showing the operation relating to the pause state of the CD player of the embodiment of the disc apparatus according to the present invention.

FIG. 6 is a diagram (No. 1) showing an operation of a conventional example.

FIG. 7 is a diagram (No. 2) showing the operation of the conventional example.

FIG. 8 is a diagram (No. 3) showing the operation of the conventional example.

FIG. 9 is a diagram (No. 4) showing the operation of the conventional example.

[Explanation of symbols]

1 Disc 2 Writing Means 3 Storage Means 4, 104 Pickup Head 5 Readout Means 10 Disc Device 11 Pause Point (Position of Pickup Head on Disc at Pause Operation) 51 First Length 52 Second Length 100 CD Player 101 CD (disk) 102 Track 103 Ram Buffer (Storage Means, Repeated Playback Means) 104a Motor (Pickup Head Drive Means) 105 Signal Processing Circuit (Write Means) 106 Microcomputer (Write Means, Read Means, Repeated Play Means) 107 LSI (Writing means, reading means, repetitive reproducing means) 107a servo LSI (pickup head drive control means) 108 digital / analog conversion circuit (reading means, repetitive reproducing means)

Claims (3)

(57) [Claims] 1. A position before and after the pause point, with the position of the pickup head on the disc at that time as a pause point by a pause operation for cueing reproducing from an arbitrary position of the information program on the disc on which the information program is recorded. A new pause that is moved each time a subsequent movement operation of reproducing the data of the first and second lengths recorded on the disc, writing the same in the storage means, and moving the pause point on the disc thereafter. Writing means for reproducing the data of the first and second lengths before and after the point and writing the data in the storage means to update the data of the first and second lengths, and after the pause operation Before the pause cancel operation, the data for the first length before the pause point on the disk written in the storage means is repeated. Disk apparatus characterized by comprising a reading means for reading the pause point subsequent length of the data of the second on the disc written in the storage unit read by said pause release operation Te. 2. The position of the pickup head on the disc at that time is set as a pause point by a pause operation for cueing to reproduce from the arbitrary position of the information program on the disc on which the information program is recorded, and the position before the pause point is set. The data of the first length recorded on the disc is repeatedly reproduced, and the disc is recorded on the disc before the new pause point moved every time the moving operation is performed to move the pause point on the disc. In a disc device which repeatedly reproduces the data of the first length and reproduces the data from the pause point on the disc by a pause cancel operation, it is recorded after the pause point on the disc by a ready operation. Writing means for writing data of a second length to the storage means, and the pause canceling Created by the disk apparatus characterized by comprising a reading means for reading the second length of the data of the pose points later on the disk written in the storage means. 3. A disk drive means for rotationally driving a disk on which an information program is recorded, a pickup head for reproducing data recorded on the disk, and a pickup head for driving the pickup head in a radial direction on the disk. Drive means, pickup head drive control means for controlling the pickup head drive means, storage means for reproducing and writing data on the disc, and for cueing for reproducing from any position of the information program of the disc When the position of the pickup head on the disc at that time is set as a pause point by the pause operation, the pickup head drive means controlled by the pickup head drive control means drives the pickup head on the disc to reproduce. The pose on the disc A writing means for writing data of a second length after the recording to the storage means, and a reproduction for repeatedly reproducing the data of the first length recorded before the pause point on the disc by the pause operation. A disk device comprising: reproducing means; and reading means for reading data of the second length after the pause point written in the storage means in response to a pause canceling operation.