JPH03296976A - Optical disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To discriminate the propriety of the recording state of the device inexpensively by using one optical pickup for recording and reproduction in common to implement repetitively recording and reproduction in time division for each prescribed time of a music signal inputted continuously. CONSTITUTION:An optical pickup 1 is moved to a sector address having a 1st recording to reproduce the recording. A data demodulated from an optical disk 2 via a read circuit 3b, a modulation demodulation circuit 4 and an ECC coder decoder 5 is compared with a data in a 1st memory 12 stored in advance to check the error status only. The recording and reproduction as above is implemented while a music signal inputted continuously is stored in a 2nd data buffer memory 13 and terminated before the 2nd data buffer memory 13 is fully occupied. Thus, the propriety of the recording state is easily discriminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc recording and reproducing device for recording and reproducing music signals, and more particularly to a device for determining whether the recording state is good or bad during recording.

[Conventional technology]

Conventionally, a configuration as shown in FIG. 4 has been used to record a music signal and judge whether the recording state is good or bad. A recording-only optical pickup la and a reproduction-only optical pickup jb are placed in opposite positions, and the recording light pink-up 1a records the signal to be recorded on the optical disc 2, and the recorded signal on the optical disc 2 is The reproducing optical pickup jb was used to reproduce the recorded data, and to judge whether the recording condition was good or bad.

In addition, the two optical pickups la for recording and playback mentioned above,
A two-beam optical pickup consisting of a single optical pickup has been reported. In this case as well, as in the previous case, the front beam recorded on the optical disc, and the rear beam reproduced all recorded signals on the optical disc to judge whether the recording state was good or bad.

In either case, the recorded music signal is input continuously, and the above operations, that is, recording and reproduction are performed simultaneously until a recording stop command is issued, and the quality of the recording state at the time of recording is determined.

(Problems to be Solved by the Invention) As mentioned above, since two optical pick amplifiers are used, one for recording and one for playback, drive and control circuit parts for each optical pick amplifier are required, and many parts are required. The drawback was that it was a large device.

On the other hand, when a two-beam optical pickup is used, it is difficult to mass-produce it using current manufacturing technology, so it has the disadvantage that it is much more expensive than a recording/reproducing optical pickup.

Furthermore, in any of the above cases, since it is necessary to perform recording and reproduction at the same time, there are problems in that the timing of the control circuits is complicated, and the amount of absolute control circuits increases.

[Means to solve the problem]

The present invention modulates a music signal with an encoder, records the modulated data on an optical disc capable of recording music signals with an optical pickup for recording and reproduction, and reproduces the recorded signal on the disc with the optical pickup. , an optical disc recording and reproducing device that demodulates and reproduces music signals using a decoder, which has a transfer speed for recording and reproducing on the optical disc at a frequency that is at least twice the sampling frequency of the music signal, and when recording, continuously input music signals. Recording at the aforementioned optical disk transfer speed at predetermined time intervals or for each predetermined music signal capacity, reproducing the recorded data at the transfer speed, and repeating recording and reproduction in a time-sharing manner,
This is an optical disc recording and reproducing device that determines whether the recording state is good or bad.

[Effect]

In the apparatus of the present invention, when recording a music signal, it is recorded on an optical disc at a frequency at least twice the sampling frequency of the music signal using one optical pickup for both recording and reproduction, and the recorded signal is also recorded on the optical disc at a frequency that is at least twice the sampling frequency of the music signal. At every predetermined time of a music signal, 0 or more recording operations and playback operations are continuously input, or when a predetermined music signal is reproduced from an optical disk at a frequency that is at least twice as high as the sampling frequency to determine whether the recording state is good or bad. By repeating the process in a time-division manner for each capacity, it is possible to judge whether the recording state of an inexpensive optical disc recording/reproducing device is good or bad.

〔Example〕

An embodiment according to the present invention is shown in FIG. 1, and this embodiment is based on a disk rotation system with a constant angular velocity. Assume that an optical disk is used in which a spiral trunk on the optical disk is divided into arbitrary block sizes (c sector size). Disc [i1 transfer 11k is 1800 RPM
, lt - If the number of sectors per rack is 17 and 1024 bytes per sector, then 522 KBYTE S
CDs (compact discs), which are currently popular in consumer devices, have a sampling frequency of 4, which has the transfer speed of RC (excluding additional information such as address information and error correction codes).
4111112 Since the number of quantization is 16BIT and 2 channels, the transfer speed on the disk is 176IB
YTI! It is 5tIC. Therefore, the transfer speed of the first embodiment is approximately three times the transfer speed of a CD.

Now, let's go back to FIG. 1 and explain. The input and output music signals to be reproduced have a sampling frequency of 44.
1KHz, fl quantization number 16BIT, 2 channels. The main block of the present invention is a disk recording/reproducing address generator 8 that operates with the system clock 6.
, a music input/output address generator 1O1 operating at music input/output sampling 1V1, the first and second data buffer memories 12 and 13 whose memory is read and written by each address generator, and the peripheral area of the buffer memory. A plurality of tri-state transceivers and a tri-state buffer. Also, there is a memory read/memory write control circuit 9 that controls the buffer and memory read/write.

Two first and second data buffer memories 12 are used as timings for time-divisionally recording and reproducing information on the optical disc 2.
．． 13, the music signal recording sequence Jk'I11 when memory storage of record data in the first buffer memory 12 is full. is stored in At that time, the address to the memory is determined by the music input/output address generator 1O, which is the music input/output sampling clock 1.
Each 1 is incremented sequentially from 0 and addressed to the microprocessor 7. Since the input data sampled into digital data by the A/D converter 15 as the recording signal 17 of the music signal is input continuously, the above-mentioned first
When the first data buffer memory 12 becomes full, the second data buffer memory 13 is immediately switched to the second data buffer memory 13 via the sector circuit 14. Further, a status indicating that each data buffer memory 12, 13 is full is transmitted to the microprocessor 7. This status indicates that memory data is to be read from the first or second data buffer memory 12.13 which is now full and recording to the optical disc 2 is to be started. The address is generated by the disc recording/reproducing address generator 8. The read data passes through a data bus, passes through an ECC encoder/(decoder) 5 and a modulation/(demodulation) circuit 4, and is outputted to the optical pickup 1 by the write circuit 3b, where it is written on the optical disc 2. recorded. Naturally, the number of sectors to be recorded is equal to the data buffer memory capacity. When you finish recording this data buffer memory capacity, this time,
To determine whether the recorded state is good or bad, the disc area is actually played back and error conditions are checked. Therefore, the optical pickup 1 is moved to the first recorded sector address and reproduced. The playback sequence is similar to the prior art and will not be described here. However, the data demodulated from the optical disc 2 via the reading circuit 3b, the (modulation)/demodulation circuit 4, and the ECC (code) decoder 5 is not stored in the data buffer memory, but is stored in the first memory previously stored. For recording/playback operations of 0 or more to check only the error status by comparing with the data in the buffer memory, continuously input music signals are transferred to the second data buffer memory 13.
This is performed while storing data in the second data buffer memory 13, and ends before the second data buffer memory 13 becomes full. This means that the system clock 6 used for disc recording and playback, including the travel time of the optical pickup 1, is required to be more than twice as high as the music sampling frequency, including the travel time of the optical pickup 1, from recording to the disc mentioned above. It shows. Here, when which second data buffer memory 13 becomes full, recording on the optical disc 2 is resumed. Needless to say, the address of the optical disc 2 for restarting recording is determined from the previous recording stop address. During recording on the optical disc 2, the input music signal is stored in the first data buffer memory 12. In the subsequent processing, recording and reproduction are performed as described above, and the above operations are repeated.

These sequences will be explained in detail with reference to the recording flowchart of the present invention shown in FIG. 2 and the timing chart of storage and readout from the data buffer memory in the present invention shown in FIG. In Fig. 2, at the same time as the recording command to the optical disc is issued, the input music data is stored in the first storage location using Sl.
Initial setting is performed in the buffer memory 12 of. In S2, record the recording start address on the optical disc 2. Move the optical pink-up l to this address and hold the track while waiting for the status of whether the storage destination buffer memory has been switched in S3. This is as explained briefly. This is a check to see if the buffer memory is full. In S4, if the buffer memory has been switched in S3, in order to record on the optical disc 2, the data to be recorded is read out from the already full buffer memory and recorded on the optical disc 2.

In this recording operation, reading is performed until the first buffer memory 12 becomes empty in S5, and recording is continued until one portion of the first buffer memory 12 has been recorded. In S6, in order to confirm the recording state, the optical pink-up 1 is returned to the address position where it was just recorded, and a reproduction operation is performed.The reproduced data is compared with the recorded data stored in the first buffer memory.

When this playback operation is completed, the address of the next optical disc to be recorded is sent to the second buffer memory 13 in S7.
The recorded data stored in is recorded on the optical disc 2 in the same manner. In step S8, it is checked whether there is a recording stop command or not, and if there is no recording stop command, the above flow is looped as shown in the figure. If these are expressed as a timing chart of storing and reading from the buffer memory, it will be as shown in FIG. Since the recording data to be recorded is input continuously, the data is stored alternately and continuously in the first and second buffer memories 12, 13. However, reading from the buffer memory is performed at high speed and discretely. In addition, here, between the reading of the first and second buffer memories 12 and 13 for recording on the optical disc 2 and the playback operation for determining the quality of recording, there is a blank time when the optical pink-up 1 is returned. In short, it is possible to determine how many times the sampling frequency of the input music signal should be set for the system black owl shown in Fig. F by taking this overhead into consideration and the capacity of the buffer memory.

As described above, an optical disc is recorded at a disc transfer speed that is more than twice the sampling frequency of the input music signal, and its reproduction is sequentially repeated using a single optical pink-up for recording and reproduction to determine the quality of the recording. Devices can be configured.

〔Effect of the invention〕

As described above, according to the present invention, by using one recording/reproducing pick amplifier and performing recording/reproducing in a time-sharing manner,
It is possible to provide a device that determines whether the recording state is good or bad.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. Figure 2 is a flowchart when recording the music signal, and Figure 3.
The figure is a timing chart of storage and readout from data bath sofa memory. FIG. 4 is a block diagram of a conventional example. <,.

Claims (1)

[Claims] A music signal is modulated by an encoder, the modulated data is recorded on an optical disc capable of recording music signals, using an optical pickup for recording and reproduction, the recorded signal on the disc is reproduced by the optical pickup, and a decoder In an optical disc recording/playback device that demodulates and plays music signals,
It has a transfer speed for recording and reproducing on an optical disk at a frequency that is at least twice the sampling frequency of the music signal, and when recording, continuously inputs the music signal at a predetermined time interval or for each predetermined music signal capacity, as described above. An optical disk recording and reproducing apparatus that records at an optical disk transfer speed, reproduces the recorded data at the transfer speed, and judges whether the recording state is good or bad while repeating recording and reproduction in a time-division manner.