JP2000123556A - Program searching reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize program searching reproducing by simple processing, wherein standby time from the instruction of skip reproducing or program reproducing to the output of a voice is shortened even when the length of music is extremely short or recorded in an extremely divided manner. SOLUTION: An MPU 14 writes the data of the head portion of music in a first memory 9 beforehand via a memory control means 11, and adds recording type information to the data according to the length of a part recording the music or the number of such parts when the operation is finished. Then, when a key 15 is pressed to reproduce the music from its head, the starting position of continuous data to be written in a second memory 10 is decided according to the recording type information, and written in the second memory 10 via the memory control means 11. Further, the order of reading the data from the first and second memories 9 and 10 is also decided according to the recording type information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cueing reproduction apparatus capable of cueing and reproducing data such as music output from a recording medium immediately.

[0002]

2. Description of the Related Art In recent years, data in a recording medium such as a mini disk system is intermittently written to a memory at a high transfer rate or in a compressed state, while data is continuously read from the memory at a low transfer rate to reproduce data. Things to do have appeared. Conventionally, as a method of utilizing the memory, a function of preventing sound skipping during vibration has been mainly developed, but recently, for example, as shown in Japanese Patent Application Laid-Open No. Hei 7-21692, music is reproduced. Before starting, write only the beginning of the song to the memory, and when a song playback command is issued, read and play the beginning of the designated song from the memory and write the subsequent data to the memory at the same time. Accordingly, there is a method of eliminating a waiting time until the beginning of a music piece is reproduced.

[0003]

However, in the above-mentioned publications which describe the prior art, the recording form of music, that is, a continuously recorded area (this is called "part")
No length or number is mentioned.
For this reason, for example, when the length of the music is extremely short or when the music is recorded in an extremely divided manner, the method of detecting the end position of the data written in the memory in advance, or when a music playback instruction is issued. There has been a problem that the method of calculating the start position of the subsequent data to be written to the memory becomes complicated.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. For music of any recording form, the waiting time from when a music playback command such as skip playback or program playback is issued to when sound is output is reduced. It is another object of the present invention to provide a cueing reproduction device which can be shortened by simple processing.

[0005]

In order to achieve this object, a cue reproduction apparatus according to the present invention reads data from a recording medium in which a song composed of a single or a plurality of parts and positional information of the song are recorded. A medium reproducing means for reading, a first memory for storing a head portion of a song in the read data, a second memory capable of storing a continuation portion of the head portion in the data, a music in the data A position information storage memory for storing position information, a memory control means for controlling writing and reading of data to the first memory, the second memory, and the position information storage memory; and a first and a second memory through the memory control means. A data reproducing means for reading data from the second memory, and data to be written to the first memory and the second memory according to the information in the position information storage memory. And a data control means for determining an order of reading data and issuing a read / write instruction to the first memory and the second memory to the memory control means, wherein the data control means stores the first memory and the first memory in the first memory. When the data of the head part of the music is written in advance, recording form information according to the form of the part in which the music is recorded is added to the data.

With such a configuration, when writing the data of the head part of the music in the first memory in advance, the recording according to the form of the part in which the music is recorded, that is, the length of the part, the number of parts, etc. When data is read out from the first and second memories and reproduced by only a simple process of adding the morphological information to the data, the data reading method can be changed according to the recording morphological information. As a result, sound is output instantaneously when a music reproduction command is issued for any music in any recording format.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 is a medium reproducing means for reading data from a recording medium on which a song composed of a single or a plurality of parts and positional information of the song are recorded; A first memory for storing a head portion of a music piece in the obtained data, a second memory capable of storing a portion subsequent to the head portion in the data,
A position information storage memory for storing position information of a song in the data; a memory control unit for controlling writing and reading of data to the first memory, the second memory, and the position information storage memory; A data reproducing means for reading data from the first and second memories, and data to be written to the first and second memories and an order for reading the data are determined according to the information in the position information storage memory. Data control means for issuing a read / write command to the first memory and the second memory to the memory control means, wherein the data control means, when writing data of a head portion of the music to the first memory in advance, Is added so as to add recording form information according to the form of the part in which is recorded.

Thus, when the data of the head part of the music is written in the first memory in advance, the recording form information according to the form of the part in which the music is recorded is simply added to the data. When data is read from the first and second memories and reproduced, the method of reading data can be changed in accordance with the recording format information. The sound is output instantaneously when issued.

According to a second aspect of the present invention, data of a head portion of a music piece is written in a first memory in advance, and when a music playback instruction is issued, the first memory data is read from the first memory. At the same time as performing the reading and reproducing operation of the head portion of the designated music piece,
The data control means is configured to perform a write operation of data subsequent to the data written in the memory of the specified music when a music reproduction command is issued and the specified music is reproduced from the beginning.
The apparatus is characterized in that a start position of data to be written to the second memory is determined according to recording form information.

[0010] Thus, following the end of the head portion of the designated music, the next portion is appropriately reproduced.

According to a third aspect of the present invention, the data control means records the order in which data is read from the first memory and the second memory when a music reproduction command is issued and the specified music is reproduced from the beginning. It is characterized in that it is configured to be determined according to the form information.

[0012] Thus, similarly to the end of the head portion of the designated music, the next portion is appropriately reproduced.

According to the embodiment of the present invention, the data control means writes a predetermined amount of data from the beginning of the music to the first memory via the memory control means in advance, and when the operation is completed, the music is reproduced. In accordance with the length and number of recorded parts, three types of recording form information of “next sector continuation code”, “next song reproduction code”, and “next part reproduction code” are added to the data. Note that one or more sectors form one part, and one or more parts form one piece of music.

When a music reproduction command is issued and the music is reproduced from the beginning, the start position of the subsequent data to be written to the second memory is determined according to the recording mode information as described above, and the memory control means Is written to the second memory via. Further, the order of reading data from the first memory and the second memory is also determined according to the recording mode information. In this way, the cue reproduction that can reduce the waiting time from the issuance of the music reproduction command to the output of the sound is realized by the simple processing for the music in any recording form.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a cue reproduction apparatus of the present invention. In FIG. 1, reference numeral 1 denotes an optical disk, which has a predetermined track form and on which compressed data is recorded in sector units. 2 is an optical disk 1
Rotating means 3 for rotating the optical disk 1, a light beam is condensed on the recording / reproducing surface of the optical disk 1 to form a light spot, and an optical pickup for detecting the reflected light thereof. A feed motor for driving the motor; an RF amplifier for generating a control signal and an information reproduction signal from an output of the optical pickup; an signal demodulation unit for demodulating an information reproduction signal output from the RF amplifier; The servo circuit controls the pickup 3 and the feed motor 4. These optical pickup 3, RF amplifier 5,
The signal demodulating means 6 constitutes a medium reproducing means.

Reference numeral 8 denotes a position information storage memory for storing the position information of the music recorded on the optical disk 1, 9 a first memory for storing the head of the music, and 10 a second memory for storing the entire music. is there. 11 is the first memory 9
And memory control means for controlling writing and reading of data to and from the second memory 10 and the position information storage memory 8. Reference numeral 12 denotes a decompression means, which is used for the first memory 9 or the second memory 9.
The compressed data written in the memory 10 is expanded. Reference numeral 13 denotes a D / A converter which converts a digital signal output from the decompression means 12 into an analog audio signal.
The expansion means 12 and the D / A converter constitute a data reproducing means.

Reference numeral 14 denotes a microprocessor (hereinafter, referred to as "MPU") as data control means. Data to be written into the first memory 9 and the second memory 10 according to the information in the location information storage memory 8, and data Is determined, and a read / write command to the first memory 9 and the second memory 10 is issued to the memory control unit 11. Reference numeral 15 denotes a key for issuing a music reproduction command.

The operation of the cue reproduction apparatus configured as described above will be described below. First, when the system is stopped or when waiting for intermittent playback, the MPU 14 controls the servo circuit 7 after acquiring the first part position information of the music from the position information storage memory 8 via the memory control means 11. Rotating means 2, optical pickup 3, feed motor 4
To read the information reproduction signal from the optical disk 1 by accessing the beginning of the music. And the memory control means 1
Then, a predetermined amount of data is written into the first memory 9 from the beginning of the music, that is, from the beginning via the first memory 9 (the above operation is defined as "preceding writing"). This preceding writing is performed for a predetermined number of songs, and when it is completed, the servo circuit 7 is controlled to
For example, the rotation unit 2, the optical pickup 3, and the feed motor 4 are stopped.

When an input from the key 15 is detected, the head of the music to be reproduced is read out from the first memory 9 via the memory control means 11 and output to the decompression means 12. Output audio.
At the same time, the servo circuit 7 is controlled to operate the rotating means 2, the optical pickup 3, and the feed motor 4, read an information reproduction signal from the optical disk 1, and read the information reproduction signal to the second memory 10 via the memory control means 11. Write the following data.

FIG. 2 is a flowchart describing processing for preceding writing for cueing reproduction executed by the MPU 14, and is indicated by F201 to F212. The operation will be described below.

The MPU 14 acquires the first part position information of the music to be written from the position information storage memory 8 via the memory control means 11 (F201). Thereafter, the servo circuit 7 is controlled to operate the rotating means 2, the optical pickup 3, and the feed motor 4, and the head of the music is accessed to read the information reproduction signal from the optical disk 1. Then, a predetermined amount of data is written to the first memory 9 from the beginning of the music via the memory control means 11. At this time, each time one sector is written, it is determined whether the number of sectors for preceding writing has reached a predetermined amount (F202). If the address has not reached the predetermined amount, it is determined whether the address of the data currently being written has reached the end address of the part (F).
203). If you have not yet reached the end address,
Returning to the processing of F202, the two determinations are repeated until the determination condition of F202 or F203 becomes true.

On the other hand, if the end address of the part has been reached, that is, if the number of sectors of the part is smaller than the predetermined number of sectors to be pre-written, it is determined whether or not the next part exists in the same music (F204). . If the next part exists, the position information of the next part is obtained from the position information storage memory 8 via the memory control means 11 (F205), and the process returns to F202. That is, the data of the next and subsequent parts are written until the number of sectors for preceding writing reaches a predetermined amount. If the next part does not exist, it means that the song has ended, so the information to be added to the data (hereinafter referred to as “sector information”) is set as “next song playback code” (F206), and the predetermined number of songs is set. It is determined whether or not the preceding writing has been completed (F212). If the recording has not been completed, the process returns to the processing of F201, and the preceding writing of the next music piece is performed. When the operation is completed, the servo circuit 7 is controlled to stop, for example, the rotation unit 2, the optical pickup 3, and the feed motor 4.

FIG. 5 shows a configuration of a sector of the content to be written in the first memory 9 and the second memory 10. 50 is MP
U14 is sector information in which an arbitrary value can be set, 51 is an address recorded on the optical disk 1, and 52 is compressed audio data recorded on the optical disk 1. That is, the memory control unit 11 stores the data recorded on the optical disc 1 into the first memory 9 and the second memory 1.
When writing to 0, sector information is added.

When the number of sectors for preceding writing has reached a predetermined amount, that is, when the determination condition of F202 is true, it is determined whether the address of the currently written data has reached the end address of the part (F207). ). If the end address has not yet been reached, that is, if the number of sectors in the part is larger than the predetermined number of sectors to be pre-written, the sector information is set as “next sector continuation code” (F211), and It is determined whether the preceding writing has been completed (F212). If the recording has not been completed, the process returns to the processing of F201, and the preceding writing of the next music piece is performed. When the operation is completed, the servo circuit 7 is controlled to stop, for example, the rotation unit 2, the optical pickup 3, and the feed motor 4.

On the other hand, when the end address of the part is reached in F207, that is, when the number of sectors of the part is equal to the predetermined number of sectors to be pre-written, it is determined whether or not the next part exists in the same music piece ( F20
8). If the next part exists, the sector information is set to "next part reproduction code" (F210). If the next part does not exist, the sector information is set to "next music reproduction code" (F209), and it is determined whether or not the preceding writing of the specified number of music has been completed (F212). If the recording has not been completed, the process returns to the processing of F201, and the preceding writing of the next music piece is performed. When the operation is completed, the servo circuit 7 is controlled to stop, for example, the rotation unit 2, the optical pickup 3, and the feed motor 4.

FIG. 6 shows an example of the contents of the first memory 9 when the preceding writing is performed according to the flowchart of FIG. Here, the number of music pieces to be pre-written is 5, the next sector continuation code is “AA”, and the next music reproduction code is “B”.
B ", and the next part reproduction code is" CC ". Hereinafter, the preceding writing of each song will be described.

First, in the first tune, since the length of the part is longer than the length of the preceding writing, the next sector continuation code "AA" is written in the sector information of the last sector of the preceding writing data according to F211 in FIG. . For the second song, the length of the part is equal to the length of the pre-writing,
And since there are multiple parts in the same song, F2
In accordance with 10, the next part reproduction code “CC” is written in the sector information of the last sector of the preceding write data.
In the third song, since the length of the part is shorter than the length of the preceding writing, and there are a plurality of parts in the same song, the first part is written, and then the second part is written ( F205). Then, as shown in FIG. 6, since the length of the next part is longer than the length of the preceding write, the next sector continuation code “AA” is included in the sector information of the last sector of the preceding write data according to F211.
Write. In the fourth song, since the length of the part and the length of the preceding writing are equal and only one part exists in the same song, the next song is reproduced according to F209 in the sector information of the last sector of the preceding writing data. Write the code "BB". In the fifth song, since the length of the part is shorter than the length of the preceding writing, and only one part exists in the same song, the next song reproduction code “BB” is added to the sector information of the sector where the song is completed. Write.

As described above, the preceding writing is performed on the first memory 9.

FIG. 3 is a diagram showing a second example when a music reproduction command using the cue reproduction method executed by the MPU 14 is issued.
10 is a flowchart describing a portion for searching for a start position of data to be written to the memory 10 of F301 to F30.
9. The operation will be described below.

Upon detecting an input from the key 15, the MPU 14 sends the first memory 9 via the memory control unit 11.
Then, the code of the sector information of the last sector of the preceding write data of the music to be reproduced is read (F301). And
Three types of processing are performed according to the sector information code (F
302). First, in the case of “next sector continuation code: AA”, the next sector of the last sector in the preceding write data is set as the target address (F305). In the case of “next part playback code: CC”, via the memory control means 11,
The position information of the next part is acquired from the position information storage memory 8 (F303), and the start address of the next part is set as the target address (F304). Finally, "Next song playback code: BB"
In the case of (1), it is determined whether or not the head portion of the next music piece is written in the first memory 9 (F306). The code of the sector information of the last sector of the preceding write data of the music is read (F309), and the process returns to F302. If it is not written, the position information of the next song is acquired from the position information storage memory 8 via the memory control means 11 (F307), and the start address of the next song is set as the target address (F308).

Then, the servo circuit 7 is controlled to operate the rotating means 2, the optical pickup 3, and the feed motor 4, access the target address, read the information reproduction signal from the optical disk 1, and read the information reproduction signal through the memory control means 11. 2 is written to the memory 10.

FIG. 4 is a flowchart describing a portion for reading out the preceding write data when a music reproduction command of the cue reproduction method executed by the MPU 14 is issued.
This is indicated by F401 to F407. The operation will be described below. The minimum unit of the audio data to be expanded is a sound group (hereinafter referred to as “SG”).
To be one sector. Further, the data reading speed is equal to the decompressed data reproducing speed, and is therefore lower than the data writing speed.

When the MPU 14 detects an input from the key 15, the MPU 14 stores the head of the music to be reproduced in the memory control unit 11.
The data is read out from the first memory 9 via the D.A. At this time, every time one SG is read, the sector information of the sector to which the SG belongs is read (F401).
Then, three types of processing are performed according to the sector information code (F402). First, if it doesn't correspond to any code,
That is, in the case other than the “next sector continuation code”, “next part reproduction code”, and “next song reproduction code”, the process returns to F401.

In the case of the “next sector continuation code” or “next part reproduction code”, the S of the currently read data is
It is determined whether G is the last SG of the sector (F40).
6). In the case of the last SG, reading is performed sequentially from the beginning of the second memory 10 from the next read timing (F
407), reading of data from the first memory 9 ends, and normal reproduction processing is performed. If it is not the final SG, the process returns to F401.

In the case of the "next music reproduction code", it is determined whether or not the head of the next music is written in the first memory 9 (F403). If it is not written, the process jumps to the process of F406, and the same process as in the case of the “next sector continuation code” or “next part reproduction code” is performed. If it is written, the SG of the data currently being read is the last S of the sector.
It is determined whether it is G (F404), and if it is not the final SG, the process returns to F401. If it is the last SG, the next song is read from the first memory 9 sequentially from the beginning of the next song (F405), and the process returns to F401.

When the above processing is applied to the example of FIG.
In the case of the first, second, third and fifth tracks, "AA" is added to the sector information.
Upon reaching the last SG of the sector in which either “BB” or “CC” is written, the second memory 10 is sequentially read from the beginning from the next timing (F407). 4
In the case of the music piece, when the last SG of the sector in which “BB” is written in the sector information is reached in F404, the next first track is reached.
Then, the program jumps to the beginning of the fifth tune in the memory 9 and reads the pre-written portion of the fifth tune (F405). When the number of sectors in which “BB” is written in the sector information reaches a predetermined amount,
From the next timing, reading is performed sequentially from the top of the second memory 10.

As described above, by adding the sector information code to the preceding write data, the search of the start position of the data to be written to the second memory 10 and the detection of the read end position of the preceding write data can be easily realized. .

When the length of the part is shorter than the predetermined length for performing the preceding writing, in the present embodiment, the space is left blank for a short time. The storage start position may be shifted forward by that amount.

In the present embodiment, the memory is divided into three parts, that is, the position information storage memory 8, the first memory 9, and the second memory 10, but these memories may be realized by one memory. good.

[0040]

As described above, according to the present invention, it is possible to output a sound instantaneously after a music reproduction command is issued for a music of any recording form by a simple process.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a cue reproduction device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing processing contents of a preceding writing portion in the apparatus of FIG. 1;

FIG. 3 is a flowchart showing a process for searching for a start position of data to be written into a second memory when a music reproduction command is issued in the apparatus of FIG. 1;

FIG. 4 is a flowchart showing a processing content for reading preceding write data when a music reproduction command is issued in the apparatus of FIG. 1;

FIG. 5 is an explanatory diagram of an internal configuration of an information reproduction signal in the device of FIG.

FIG. 6 is an explanatory diagram of the contents of a first memory in the device of FIG. 1;

[Explanation of symbols]

 8 Location information storage memory 9 First memory 10 Second memory 11 Memory control means 14 MPU

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D044 BC06 CC04 DE94 DE96 FG10 FG21 FG23 JJ02 5D077 AA30 BA30 CA02 CA12 DC08 DC12 DC22 EA01 EA11 EA12 EA34

Claims (3)

[Claims] 1. A medium reproducing means for reading data from a recording medium on which a song composed of a single or a plurality of parts and position information of the song are recorded, and a head portion of the song in the read data. A first memory;
A second memory capable of storing a continuation of the head portion in the data; a position information storage memory storing position information of a song in the data; a first memory, a second memory, and a position information storage memory Memory control means for controlling writing and reading of data to and from the first and second memories through the memory control means; and a first memory according to the information in the position information storage memory. And data control means for determining the data to be written to the second memory and the order of reading the data, and issuing a read / write command to the first memory and the second memory to the memory control means. Means that when writing the data of the head part of the music to the first memory in advance, the recording according to the form of the part in which the music is recorded Cue reproducing apparatus characterized by being configured to add the state information to the data. 2. A system according to claim 1, wherein data of a head portion of the music piece is written in a first memory in advance, and when a music playback instruction is issued, the data of the head portion of the designated music piece from the first memory is written. At the same time as performing the read / reproduce operation, a write operation of data subsequent to the data written to the first memory is performed to the second memory. 2. The cueing reproduction apparatus according to claim 1, wherein a start position of data to be written into the second memory is determined according to recording form information when the music is reproduced from the beginning. . 3. The data control means determines the order in which data is read from the first memory and the second memory in accordance with the recording form information when a music reproduction command is issued and the specified music is reproduced from the beginning. 3. The cue reproduction device according to claim 1, wherein the cue reproduction device is configured as follows.