JPH05234331A - Mini-disk player - Google Patents

Abstract

PURPOSE:To improve usability of a semiconductor memory by reproducing a partial region of a sheet of mini-disk and simultaneously recording such repro duced voice signal or the voice signal in which the other voice element is over lapped on the reproduced voice signal to the other part of the mini-disk. CONSTITUTION:A compressed data on a region of a mini-disk 1 with an optical pickup 2 and it is then written into a partial region of a semiconductor decoder 14 through a semiconductor memory control circuit 9. Next, this data is inputted to a voice compression decoder 10 to expand the signal and output a voice signal. Here, a mixing switch 21 is turned ON, a voice output and a microphone input are mixed to compress these signals with a voice compression encoder 13 and write such data into the other address in the memory 14. While this write operation is continued, data of the next regioin X of the disk 1 is read and is then written into the memory 14. These read and write operations are continued. Thereby, while a partial region of a disk is reproduced, the reproduced voice signal or the signal in which other voice signal is overlapped on the reproduced voice signal can be' recorded to the other partial region of the disk. Thereby, usability of the disk can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mini disc player.

[0002]

2. Description of the Related Art A new system has been developed for an information recording carrier and its device for recording and reproducing digital signals, aiming at downsizing and extension of recording and reproducing time. For example, a disc with a diameter of 64 mm (hereinafter referred to as a mini disc) housed in a cartridge is used to reduce the size.
There is a device (hereinafter referred to as a mini disc player) that incorporates technology such as compression and compression of audio data to obtain the same recording / playback time as a compact disc, and inserting semiconductor memory as a data buffer to improve vibration resistance during playback. ..
(JAS Journal, August 1991, "Sony Mini Disc System", pages 37-42). However, the method of utilizing the semiconductor memory in such a system has been widely introduced, mainly when reproducing a disc, but not so much when recording on a disc.

[0003]

The above-described method of utilizing the semiconductor memory has been made possible by the progress of audio compression technology, and is very epoch-making. The present inventors utilized the semiconductor memory also during recording, and reproduced one part of the disc on one disc while superimposing the reproduced voice or another voice element on the reproduced voice. I thought about making it possible to record the sound on another part of the disc.

One object of the present invention is to reproduce a part of an area on one disc while reproducing the sound or the sound in which another sound element is superposed on another part of the area of the disc. It is to provide a mini disc player that can record to.

Another object of the present invention is to reproduce a part of the area of one disc while reproducing the sound or a sound obtained by superimposing another sound element on the sound in another part of the disc. It is to provide a method of utilizing a semiconductor memory to enable recording in the area.

Still another object of the present invention is to reproduce a part of an area of one disc while reproducing the sound or a sound obtained by superimposing another sound element on the sound in another part of the disc. It is to provide an algorithm for system control to enable recording in the area.

[0007]

Therefore, according to the present invention, it is possible to record and reproduce a mini disc having a cluster number and a sector number and capable of recording compressed audio data in a partial area of the disc. In the mini disk player, a search means, a pause means, a sound input data compression means, a reproduction data decompression means, a data storage means for storing data in a semiconductor memory, a data storage means for storing data in a mini disc, and a mini disk player. A reproducing means for the data recorded on the disc is provided, the compressed data recorded on the disc is read by the reproducing means, stored in the storing means, and the stored data is expanded by the expanding means to output a sound. While compressing another voice or a voice in which another voice element is superimposed on the reproduced voice by the compression means, Stored in the storage means, by the recording means the stored data, in which the region has been reproduced immediately before and characterized in that to repeat a series of operations that recorded in another area.

[0008]

Therefore, the time required to record the stored data on the disc by the recording means is more than the time for compressing the arbitrary amount of the input voice data by the compression means and the storage means and storing the compressed data. The time required for decompressing the stored data by the decompressing means and outputting the sound, rather than the time for storing the arbitrary amount of data read from the disk by the reproducing means and the storage means. By utilizing the fact that the length becomes longer, while playing a part of the area of one disc, the reproduced data or the audio data in which another audio element is superimposed on the reproduced data is recorded on another part of the disc. It is possible to record in the area.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mini disc player according to the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of hardware, FIG. 2 is a conceptual diagram showing a use state of a semiconductor memory and a position of a pickup and its time chart, and FIG. 3 is a flowchart.

In the figure, 1 is a mini disk, 2 is an optical pickup, and 3 is an R for amplifying a signal captured by the pickup.
F amplifier, 4 is a servo circuit block for controlling the motor to make the pickup follow the signal of the disc, 5 is a slide motor for sending and returning the pickup in the radial direction of the disc, and 6 is the rotation of the disc A spindle motor, 7 is an address decoder for reading an address recorded on the disc before recording audio, and 8 is an ACI of an EFM signal recorded on the disc.
EFM to solve RC and decode disc address
/ ACIRC decoder, 9 is a semiconductor memory control circuit block for managing addresses of the semiconductor memory, 1
0 is an audio compression decoder for decompressing compressed data, 11 is a D / A converter that converts a digital signal into an analog audio signal, 12 is an A / D converter that converts an input analog audio signal into a digital signal , 13 is a voice compression encoder for compressing data, 14 is a semiconductor memory, 15 is an EFM / ACIRC encoder for adding ECIRC to the compressed data to generate an EFM signal, 1
Reference numeral 6 is a circuit block for driving the recording head, 17 is a recording magnetic head for generating a recording magnetic field, 18 is a display device, 19 is a key input section for an operator to input data,
Reference numeral 20 is a microcomputer that controls the entire system, and reference numeral 21 is an on / off switch for mixing a reproduction signal and an input signal from a microphone.

Next, as an embodiment of the present invention, based on the flow chart shown in FIG. 3, by effectively utilizing the semiconductor memory, audio data for one song is stored in the areas indicated by i, x and j in FIG. It is assumed that it is recorded, and it is possible to superimpose the sound from the microphone input on the reproduced sound and record it in the area indicated by I, X, and J while reproducing the music. ..

S1 reproduction starts. Pause after playback. Using the optical pickup 2 shown in FIG. 1, reading of recorded data in the area indicated by i on the mini disc 1 is started. Here, the compressed data read from the area indicated by i is assumed to be data i. The data i is fetched by the RF amplifier 3 and is ACIR by the EFM / ACIRC decoder 8.
The C is solved, and the semiconductor memory control circuit 9 writes in a partial area in the semiconductor memory 14 in real time. Since the data i is compressed data, the data i can be read in a fraction of the time when it is actually expanded and voice output. When all the data i in the area indicated by i has been read, the pickup 2 detects the area x which is the end position of the area i.
Pose at the start position. This operation is shown between time axes 0 and 1 in FIG.

S2 expansion, voice output, and mixing recording start. Data i written in a partial area of the semiconductor memory 14
Is read out and input to the audio compression decoder 10 in FIG.
Audio is output through the / A converter 11. By turning on the mixing switch 21, the output voice and the voice element input from the microphone input are mixed,
After the analog signal is converted into a digital signal through the / D converter 12, it is compressed by the audio compression encoder 13 and is converted by the semiconductor memory control circuit 9 into an address area different from the address area used in S1 in the semiconductor memory 14. Write. The compressed data written here is assumed to be data i + α. This operation is continuously performed until the time axis = 6 with the time axis = 1 in FIG. 2 as the starting point.

S3 reproduction starts. While continuing the expansion of the data i and the write operation of the data i + α to the semiconductor memory 14, it is necessary to fetch the data in the area indicated by x next to the area indicated by i before the data i in the semiconductor memory 14 is exhausted. Therefore, the reading of the data in the area indicated by x is started. The compressed data read from the area indicated by x is assumed to be data x. Data x
Is written in the address area in the semiconductor memory 14 which is continuous with the address in which the data i is written through the circuit described in S1. This indicates a time axis = 4 to 5 in FIG.

S4 Search for recorded location. When all the data i + α has been written to the semiconductor memory 14, the data must be recorded in an area different from the reproduced area of the disk 1, so that before that, the optical pickup 2 and the recording head are recorded at the recording location. It is necessary to move 17 and make it stand by. In this embodiment, the data i + α is recorded in the area indicated by I in FIG. 1, and therefore, when the reading of the compressed data x in the area indicated by x and the writing to the semiconductor memory 14 are completed,
The start point of the area indicated by I is searched, and when the search is completed, a pause is made at that position. This indicates between time axes 5 and 6 in FIG.

S5 Decompression, audio output, and mixing recording continue. Start recording. When all the voice output of the decompressed data of the data i is finished, and at the same time when all the writing of the data i + α to the semiconductor memory 14 is finished, the voice output of the decompressed data of the data x is mixed with the voice. The data compression is started, and the compressed data is written in the address area continuous to the address where the data i + α was written. The compressed data to be written here is assumed to be data x + α. At the same time, recording of the data i + α in the area indicated by I in FIG. 1 is started. Since the data i + α is compressed data, it can be recorded on the disc in a fraction of the actual writing time. This operation is shown between time axes = 6 to 7 in FIG.

S6 Search for the start point of the next playback point,
Poses at that position. While continuing the expansion of the data x and the write operation of the data x + α to the semiconductor memory 14, it is necessary to fetch the data in the area indicated by j next to the area indicated by x before the data x in the semiconductor memory 14 runs out. Therefore, before that, the optical pickup 2 must be made to stand by at the starting point of the area indicated by j. Therefore, the starting point of the area indicated by j is searched, and when the search is completed, a pause is performed at the starting point of the area indicated by j. This operation is shown between time axes 7 and 9 in FIG.

S7 playback starts. While the expansion of the data x and the write operation of the data x + α to the semiconductor memory 14 are continued, the reading of the data in the area indicated by j is started. The compressed data read from the area indicated by j is assumed to be data j. The data j passes through the circuit described in S1 and is written in the address area of the semiconductor memory 14 which is continuous with the address where the data x is written. This indicates the time axis = 9 to 10 in FIG. Here, when the reading of the data in the area indicated by j is completed, it means that the reproduction of all the data for one music piece recorded in the area indicated by i, x, j is completed.

S8 Search for recorded location. When all the data x + α has been written to the semiconductor memory 14, the data must be recorded in an area different from the reproduced area of the disc. Before that, move the pickup and the recording head to the recording location. , I need to wait. In this embodiment, the data x + α is recorded in the area indicated by X in FIG. 1. Therefore, when the reading of the compressed data j in the area indicated by j and the writing to the semiconductor memory 14 are completed, X is recorded. Search the start point of the area indicated by, and when the search is completed, pause at that position. This indicates between the time axes 10 and 11 in FIG.

S9 Decompression, audio output, and continue mixing recording. Start recording. When all the voice output of the decompressed data of the data x is finished and at the same time when all the writing of the data x + α to the semiconductor memory 14 is finished, this time, the voice output of the decompressed data of the data j is mixed with the voice. The data compression is started, and the compressed data is written in the address area continuous with the address where the data x + α was written. The compressed data to be written here is assumed to be data j + α. At the same time, recording of the data x + α in the area indicated by X in FIG. 1 is started. Since the data x + α is compressed data, it can be recorded on the disk in a fraction of the actual writing time. This operation is shown between time axes = 11 to 12 in FIG.

S10 Pause at the last recorded location. It is not necessary to capture the recorded data because the capture of the reproduction data has been completed, but when all the data j + α has been written to the semiconductor memory 14, the data is recorded in a region different from the region reproduced on the disc. Since the recording of one piece of music is not completed unless the recording is performed in step 1, it is necessary to move the optical pickup 2 and the recording head 17 to the recording position and wait them before that. In this embodiment, the data j + α is recorded in the area indicated by J in FIG. 1. Therefore, when the recording of x + α data in the area indicated by X is completed, the end position of the area indicated by X is reached. J
The optical pickup 2 is paused at the start position in the area indicated by. This operation is shown between time axes 12 to 16 in FIG.

S11 Recording to the final recording location. When all the voice output of the decompressed data of the data j is completed, and at the same time, all the writing of the data j + α to the semiconductor memory 14 is completed, J of the data j + α in FIG.
Recording to the area indicated by is started. This operation is shown between time axes = 16 to 17 in FIG.

As described above, upon completion of the operations from S1 to S11, while reproducing the data recorded in the areas indicated by i, x, and j in FIG. 1, the reproduced sound is provided with the voice element from the microphone input. The mixed voice data is a region different from the region shown by i, x, j in FIG.
It is possible to record in the area indicated by J.

[0024]

According to the present invention, a player is provided with a microphone terminal and a mixing function is provided, so that a portion of the disk is reproduced on one disk, and the sound input from the microphone terminal is reproduced. It is possible to record the overlaid sound in another part of the disc. Further, according to the present invention, the player is provided with the input terminal of the electronic musical instrument and the mixing function is applied, so that one disc can be
It is possible to reproduce a part of the area of the disc, and record the sound in which another part of the disk is overlaid with the sound played by the electronic musical instrument. Further, according to the present invention, if a recording area is specified in detail on one disc, a partial area of the disc is divided and reproduced, and the divided area is continuously recorded in another area of the disc. It will be possible.

[Brief description of drawings]

FIG. 1 is a hardware block diagram showing an embodiment of a mini disc player of the present invention.

FIG. 2 is a conceptual diagram showing a usage state of a semiconductor memory and an optical pickup position showing an embodiment of a mini disk player of the present invention, and a time chart thereof.

FIG. 3 is a flowchart showing an embodiment of a mini disc player of the present invention.

[Explanation of symbols]

1 mini disk 2 optical pickup 3 RF amplifier 4 servo circuit 5 slide motor 6 spindle motor 7 address decoder 8 EFM / AC
IRC decoder 9 Semiconductor memory control circuit 10 Audio compression decoder 11 D / A converter 12 A / D converter 13 Audio compression encoder 14 Semiconductor memory 15 EFM / A
CIRC encoder 16 Head drive circuit 17 Recording head 18 Display block 19 Key block 20 System control microcomputer 21 Mixing on / off switch

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Claims (1)

[Claims] 1. Having a cluster number and a sector number,
In addition, in a mini disk player capable of recording and reproducing a mini disk in which compressed audio data can be recorded in a partial area of the disk, a search means, a pause means, a sound input data compression means, and a reproduction. Means for decompressing data, means for storing data in a semiconductor memory,
A recording means for recording data on the mini-disc and a reproducing means for reproducing the data recorded on the mini-disc are provided, and the compressed data recorded on the disc is read by the reproducing means and stored by the storing means. Is expanded by the expansion means to output a sound, and another sound or a sound in which another sound element is superimposed on a reproduced sound is compressed by the compression means, and the compressed data is stored by the storage means, and the stored data is stored. A mini disk player characterized in that a series of operations of recording data in an area different from an area reproduced immediately before by the recording means is repeated.