DE19722466A1 - Recording and reproduction component system especially for CD and MD - Google Patents

Abstract

The component system includes a reproduction arrangement for reproducing a first type of record carrier, preferably a CD, with uncompressed data. A recording and reproduction arrangement reproduces a second type of record carrier, preferably a MD, with compressed data. A common signal processing section or electronic component parts, such as a memory (20) and a system control mechanism (21), are installed jointly, for both arrangements. A selection switch switches selectively in a predetermined time frame between the arrangement.

Description

The present invention relates to a compo system in which a recording and reproducing ab cut for use in writing and reproducing tion of a first record carrier and a playback ab cut for use at least when playing a two th record carrier is provided.

Nowadays, recording / playback devices, for example a compact disc (hereinafter referred to as a CD net) and a mini disc (hereinafter referred to as MD) that spreads an audio data recording and reproducing drive can perform. In addition, for example, a comm component system has been developed in which a CD playback device and an MD recording / playback device as Unit are composed.

A structure of the component system is assembled, for example, as shown in FIG. 1.

As a recording / reproducing control system for a photo magnetic disc MD 90 is a spindle motor 51 , an optical head 52 , a gear mechanism 53 , a servo driver 54 , an RF amplifier 55 , a servo circuit 56 , a magnetic head 57 and a magnetic head driver 58 intended.

In the operation of this recording / playback control system, the photo-magnetic disc MD 90 is driven by the spin del motor 51 at a constant speed (CLV). In addition, audio data or servo information is extracted from the photo magnetic disc MD 90 via the optical head 52 and the RF amplifier 55 , and also focusing, tracking, and gear servo control for the gear mechanism 53 and a double axis mechanism are performed to store a lens in the optical head 52 . In addition, data is recorded on the photo-magnetic disc MD 90 by the magnetic head 57 , the magnetic head driver 58 and the optical head 52 . The focusing servo control, the tracking servo control, the transmission servo control and the CLV servo control are controlled by the servo circuit 56 and servo control 54 .

As a signal processing system for use in decoding the reproduced data reproduced from the MD 90 photo magnetic disk and encoding the record data on the MD 90 photo magnetic disk, an EFM encoder 61 (eight-on-fourteen- Modulation), an EFM PLL circuit 59 (phase lock circuit), an ECC encoder / decoder 62 (error correction coding), a sector encoder / decoder 63 , an audio compression / expansion signal processing section 68 , a subcode decoder 64 , a groove PLL circuit 60 and a groove decoder 65 are provided.

When performing a reproducing operation of the MD 90 photo magnetic disk, the audio data extracted by the RF amplifier 55 , that is, an EFM signal is supplied to the EFM encoder and decoder 61 and FM demodulated. As a clock used for decoding processing, a reproduction clock CK _EFM , which is synchronized with the reproduced EFM signal, is generated by the EFM PLL circuit 59 . In addition, subcode information such as an address or the like is extracted by the subcode decoder 64 .

The EFM-demodulated data is error correction decoded by the ECC Codie rer / decoder 62 with respect to decoded sector-by Sektorcodierer / decoder 63 and the audio compression / expansion signal processing section 68, audio-expanded, whereby the data to digital audio data of a sample format with 16-bit quantization and 44.1 kHz can be demodulated.

In order to realize a so-called shock protection function, processes ranging from data reproduction from the MD 90 photo magnetic disk to its sector decoding are performed periodically at a high speed, and the data decoded with respect to one sector is performed once in a DRAM 66 (buffer memory) under control of the memory controller 67 . Then, the data currently read from the buffer memory 66 at a low speed is processed audio expanded by the audio compression / expansion signal processing section 68 and demodulated into digital audio data of the original time state.

The demodulated digital audio data are converted into an analog audio signal by a D / A converter 71 (digital-analog converter) via a multiplexer 70 and output as an analog audio signal at an output connection 72 .

When recording against the MD 90 photo magnetic disk, an analog audio signal supplied from the input terminal 73 is converted into a sampling format from a 16-bit by an A / D converter 74 (analog-to-digital converter). Quantization and 44.1 kHz implemented, which is supplied to the audio compression / expansion signal processing section 68 via the multiplexer 75 , and then the audio compression processing is performed.

Data once stored in the buffer memory 66 under control of the memory controller 67 is read when the amount of data collection is larger than a predetermined amount, and the data is sector-coded by the sector encoder and decoder 63 to encode them Add error correction code by the ECC encoder and decoder 62 and EFM encoded by the EFM encoder and decoder 61 . The EFM signal generated by this encoding processing is supplied to the magnetic head driver 58 as actual recording data and used to apply a magnetic field, which is performed by the magnetic head 57 .

When the recording operation is carried out, an absolute address is read from the pre-groove part in the photo-magnetic disc MD 90 , and at the same time, the processing clock is generated. This operation is performed by the groove PLL circuit 60 and the groove decoder 65 .

The MD 90 photo recording and reproducing system is constructed as described above. A playback drive system and a signal processing system for an optical disk CD 91 will now be described.

As a playback control system for the optical disk CD 91 , the spindle motor 81 , the optical head 82 , the gear mechanism 83 , the servo driver 84 , the RF amplifier 85 and the servo circuit 86 are provided.

The optical disc CD 91 is driven by the spindle motor 81 at a constant speed. Audio data or the servo information is extracted from the optical disc CD 91 by the optical head 82 and the RF amplifier 85 . A focus operation, a tracking operation, and a gear servo operation are performed for the gear mechanism 83 and the double-axis mechanism for supporting the lens in the optical head 82 . The focus servo control, the tracking servo control, the transmission servo control, and the CLV servo control are controlled by the servo circuit 86 and the servo control 84 .

An EFM decoder 88 , an EFM PLL circuit 87 , an ECC decoder 89 and subcode decoder 89 a are provided as the signal processing system for decoding the re-produced data from the optical disk CD 91 .

When a reproduction operation of the optical disk CD 91 is performed, audio data extracted by the RF amplifier 85 , that is, an EFM signal is supplied to the EFM decoder 88 , and then the EFM demodulation is performed therefor. As a clock for the decoding operation, a reproduction clock CK _EFM , which is synchronized with the reproduced EFM signal, is generated by the EFM PLL circuit 87 . The address and other subcode information are extracted by the subcode decoder 89 a.

The EFM demodulated data is decoded for error correction by the ECC decoder 62 , whereby it is demodulated into digital audio data of a sampling format from 16-bit quantization and 44.1 kHz.

The demodulated digital audio data are converted by the D / A converter 71 into an analog audio signal via the multiplier 76 and output at an output connection 72 as an analog audio signal.

In addition, it is possible to record the reproduced audio data from the CD 91 to the photo-magnetic disc MD 90 . In this case, the reproduced digital audio data serving as the output of the ECC decoder 89 is supplied to the audio compression / expansion signal processing section 68 via the multiplexer 75 , and then recording data processing for the photo magnetic disc MD 90 is performed.

The operation of the recording and playback control system and the signal processing system for the photo-magnetic disc MD 90 and the playback control system and the signal processing system for the optical disc CD 91 is controlled by a system controller 69 which is formed by a microcomputer. In addition, an operation performed by a user is performed in an operation unit 93 , and then display of various types of information for the user is performed in the display section 92 .

The component system is set up as described above builds to the operation, for example a CD reproduction, a MD recording, MD playback and dubbing of a CD on an MD so that this is simply performed, which results in the system can be set up as a facility for one User is easy to use.

However, as can be seen from Fig. 1, the signal processing system corresponding to the photo magnetic disk MD 90 and the signal processing system corresponding to the optical disk CD 91 must be installed separately, with the result that this shows problems due to the formation of a complex circuit structure , A large-volume circuit arrangement and egg ner enlarged number of component parts as a component system, so that a small-volume structure and a cost-effective training is difficult.

In addition, since the circuit structure is structurally large, be Another problem is that the Power consumption increases.

In addition, the increased number of circuit configurations to be controlled by a system controller 69 causes the number of ports required for a microcomputer to be increased, and there may be a problem in the size of the microcomputer that has to be installed, has to be enlarged or the processing volume also increases.

In this regard, it is a task of the present the invention to simplify the circuit structure and a to realize high performance of the circuit, the Operating function is maintained as a component system.

From this point of view, the present invention provides a component system having a recording and reproducing section, which has:
a first reproducing section for use in reproducing a first type of recording medium having uncompressed data encoded by a predetermined signal processing system previously recorded thereon,
a second reproducing section capable of reproducing a second kind of recording medium having compression data encoded by said predetermined signal processing system and to which predetermined compression processing applied to it previously drawn on, and
a recording section for applying the above predetermined compression processing after encoding data with the above predetermined signal processing system to enable the data to be recorded in the second type of recording medium, and a first reproduced signal which is of the first type a recording medium is reproduced in the first reproducing section, can be copy-processed in the second way of a recording medium in the above recording and reproducing section, and further providing:
a switch to selectively switch between a first playback signal reproduced from the first recording medium type in the first reproducing section and a second type of reproducing signal reproduced from a second recording medium type in the recording and reproducing section;
a compressor for applying compression processing to a first reproduction signal which is produced from the first record carrier type in the first reproduction section re;
a signal processor for decoding a reproduction signal provided by the switch in response to the predetermined signal processing system and also for encoding compression data for which compression processing by the above compressor with the predetermined signal processing system has been applied;
a memory for storing the compression data to which compression processing by the compressor has been applied;
a discriminator for discriminating whether an accumulated amount of compression data stored in the memory is larger than a predetermined amount; and
a controller for switching the processing in the signal processor to encoding processing to apply the predetermined signal processing system to the compression data that has been compression-processed by the decoding processing in response to the predetermined signal processing system for a reproduced signal supplied from the switch for switching to stop a playback operation of the first recording medium type in the first reproducing section and also to start a recording operation for the second recording medium type in the recording section included in the above recording and reproducing section in the case where the discriminator decides that an accumulated amount of Compression data stored in the memory is larger than a predetermined amount.

In addition, the present invention provides a component system including a recording and reproducing section which has;
a first reproducing section for use in reproducing a first type of recording medium having uncompressed data encoded by a predetermined signal processing system pre-recorded thereon,
a second reproducing section which can reproduce a second recording medium type, which has compression data encoded by the above predetermined signal processing system and to which a predetermined compression processing is applied, which is previously recorded thereon, and a recording section for applying the predetermined compression processing encoding data with the above predetermined signal processing system so that the data can be recorded on the second type of record carrier, which provides:
a first switch to selectively switch between a first reproducing signal which represents uncompressed data reproduced by the first recording medium type in the first reproducing section and a second type of reproducing signal which represents uncompressed data which is from a second recording medium type in the recording - and playback section are reproduced;
a signal processor for decoding a playback signal, which is supplied by the first switch, as a response to the predetermined signal processing system;
an expander for performing expansion processing on the second reproduction signal, which is compression data supplied by the signal processor;
a second switch to selectively switch between a second playback signal which has been expanded by the expander and a first playback signal which is non-compressed data provided by the above signal processing means, and
a controller for switching the first switch and the second switch depending on the kind of the reproducing recording medium.

Brief description of the drawings

Fig. 1 is an overall block diagram to show a known component system.

Fig. 2 is an overall block diagram to show a component system of a first embodiment to which the present invention is applied.

Fig. 3 is a table to show some types of control performed by a system controller when a reproducing operation is performed in the recording and reproducing section.

Fig. 4 is a table to show some types of control performed by a system controller when a recording operation is performed in the recording and reproducing section.

Fig. 5 is a table to show some types of control performed by a system controller when a playback operation is performed in the playback section.

Fig. 6 is a table to show some types of control performed by a system controller when a signal reproduced in the reproducing section CD is processed to be copied on a recording and reproducing section MD.

Fig. 7A shows a timing diagram for a CD-proces processing in the reproducing section, when a component system ei ner first preferred embodiment is operated for copying.

FIG. 7B shows a timing diagram for a process ing an EFM encoder / decoder 11, when a component system of a first preferred embodiment is operated for copying.

Fig. 7C is a timing diagram for a process ing an ECC encoder / decoder 16, when a component system of a first preferred embodiment is operated for copying.

Fig. 7D shows a timing diagram for a process ing a Sektorcodierers / decoder 17, when a tensystem Components of a first preferred embodiment is operated for copying.

Fig. 7E shows a timing diagram for a process ing in relation to an area A in a DRAM when a Kom component system of a first preferred embodiment is operated for py Ko.

Fig. 7F shows monitoring operation is a timing diagram for a surveil when a component system first before ferred embodiment is operated to copy a.

Fig. 7G shows a timing diagram for a process ing in an audio compression / expansion signal processing section 19, when a component system of a first preferred embodiment is operated for copying.

Fig. 7H is a timing diagram for a process ing for a region B in the DRAM, when a component system of a first preferred embodiment is operated for copying.

FIG. 7I illustrates a timing diagram for a angesam melte amount in a range B in the DRAM, when a stem Komponentensy a first preferred embodiment for copying will be driven.

Fig. 7J time a timing chart for an operation of an MD in a recording and reproducing portion when a component system of a first preferred embodiment is operated for copying.

Fig. 8 is an overall block diagram to show a component system of a second preferred embodiment to which the present invention is applied.

Fig. 9 is a table to show some types of control performed by a system controller when a signal reproduced in a reproducing section CD in a second preferred embodiment is processed for copying.

Fig. 10A shows a timing chart for processing a CD in the playback section when a component system of a second preferred embodiment is operated for copying.

FIG. 10B shows a timing diagram for a proces processing of an EFM encoder / decoder 11, when a tensystem Components of a second preferred embodiment is operated ren to copy.

Fig. 10C shows a timing diagram for a proces processing of an ECC encoder / decoder 16, when a tensystem Components of a second preferred embodiment is operated ren to copy.

Fig. 10D is a timing chart for a processing a proces Sektorcodierers / decoder 17, when a compo component system of a second preferred embodiment is operated for py Ko.

FIG. 10E shows a timing diagram for a processing in a proces Audiokompressi ons / expansion signal processing section 19, when a compo component system of a second preferred embodiment is operated for py Ko.

Fig. 10F shows a timing diagram for a proces processing for a DRAM, when a component system of a two-th preferred embodiment is operated for copying.

Fig. 10G time a timing diagram for a angesam melte amount in a DRAM, when a component system it is operated most preferred embodiment, the Copy.

Fig. 10H shows a timing chart for an operation of an MD in a recording and reproducing section when a component system of a first preferred embodiment is operated for copying.

Detailed description of the preferred Embodiments

With the help of the drawings, all are now preferred Embodiments of the component system of the present Er described as follows. The description is in the carried out in the following order:

• 1. Example of a structure of the component system
• 2. Operating mode when playing the MD
• 3. Operating mode when recording the MD
• 4. Operating mode when playing the CD
• 5. Operating mode when copying from CD to MD
• 6. Example of a structure of the component system in its modified form
• 7. Operation of the component system when copying the CD on the MD in its modified form

1. Example of a structure of the component system

In FIG. 2, an example of a structure of a compo shown nentensystems according to the present invention.

A component system is described in which an MD recording and reproducing device is provided, in which the MD 90 is used as a recording medium, and a CD reproducing device which uses the optical disk CD 91 as a recording medium.

In Fig. 2, the photo magnetic disc MD 90 is installed in a place that becomes an MD recording and playback driving system. As a recording and playback control system for the photo-magnetic disc MD 90 is a spindle motor 1 , an optical head 2 , a double-axis mechanism 3 , a gear mechanism 4 , an RF amplifier 5 , a magnetic head 6 , a magnetic head control 7 , a servo control 9 and a servo circuit 8 are provided.

The optical disc CD 91 is installed at a location that becomes a CD playback drive system. As the display drive system for the optical disk CD 91 , a spindle motor 31 , an optical head 32 , a double-axis mechanism 33 , a gear mechanism 34 , an RF amplifier 35 , a servo circuit 36 and a servo driver 37 are provided.

The present invention is characterized in that a signal processing system for use in performing a decoding operation for the reproduced data from the MD 90 photo magnetic disk and a decoding operation for recording data corresponding to the MD 90 photo magnetic disk, and a signal processing system for decoding the reproduced data from the optical disk CD 91 is operated functionally together. As a signal processing system belonging to the MD 90 photo magnetic disk, there is an EFM encoder / decoder 11 , an EFM PLL circuit 12 , an ECC encoder / decoder 16 , a sector encoder / decoder 17 , an audio compression / Expansion processing section 19 , a subcode decoder 14 , a groove PLL circuit 13 and a groove decoder 15 are provided. In addition, a DRAM (buffer memory) 20 is provided, which is used to implement a shock protection function, which will be described later, or for copying from a CD to an MD, and a memory controller 18 , which is used to control writing or reading for the buffer memory 20 is used ver.

The MD disk 90 (photo magnetic disk) installed in the MD recording and playback drive system is used as a carrier capable of recording audio data, and this disk is driven by the spindle motor 1 at a constant speed driven in a recording and playback operation.

The operation of the optical head 2 is carried out as a head for use in recording and reproducing, wherein a laser beam is radiated toward the photo magnetic disc MD 90 in a recording and reproducing operation. That is, in the recording operation, a laser output signal having a high level for use in heating the recording track up to the Curie temperature and, in contrast, a laser output signal having a relatively low level is output to the data from a reflecting light under a magnetic To sample the Kerr effect when performing a playback operation.

In order to carry out this operation, the optical head 2 has an optical system which consists of a laser diode which serves as a laser output device, or a polarization beam splitter or an objective 2 a or the like and a detector which is used for a reflecting light to determine. The lens 2 a is held so that it can be displaced in a radial direction of the photo-magnetic plate MD 90 , and in a direction to move in direction on or from the photo-magnetic plate MD 90 , and the entire optical head 2 can be moved by the gear mechanism 4 in a radial direction of the photo-magnetic table MD 90 .

In addition, the magnetic head 6 is arranged at a position opposite to the optical head 2 with the photo magnetic disc MD 90 held therebetween. This magnetic head 6 performs an operation to apply a magnetic field, which is modulated with respect to the supplied data, to the photo magnetic disc MD 90 .

The magnetic head 6 can be moved in a radial direction of the disk by the gear mechanism 4 together with the optical head 2's .

Information (reflecting light), which is determined from the photo-magnetic plate MD 90 , wherein the optical head 2 is in a playback mode for the photo-magnetic plate MD 90 , is supplied to the RF amplifier 5 . The RF amplifier 5 extracts the reproduced RF signal, a tracking error signal TE, a focus error signal FE and a groove information GV via a calculation processing of the supplied reflection light information.

The groove information GV is provided so that a pre-groove, which was previously set in the photo-magnetic disc MD 90 , is processed by a predetermined modulation with an address notched.

The extracted reproduced RF signal is encoded into a binary value, which is converted into an EFM signal, and supplied to the EFM encoder and decoder 11 and the EFM PLL circuit 12 via the multiplexer 10 . In addition, the tracking error signal TE and the focus error signal FE are supplied to the servo circuit 8 , and the groove information GV is supplied to the groove PLL circuit 13 and the groove decoder 15 .

The servo circuit 8 may contain various types of servo drive signals (Spurnachführungsansteuersignal, Fokussie rungsansteuersignal, Getriebeansteuersignal and CLV Ansteuersi gnal) with respect to a supplied tracking error signal TE, a focusing error signal FE, a track jump Anwei solution, an access instruction, and a Drehzahlabtastinforma tion of the spindle motor 2 generate , which are obtained from the system controller 21 , which is formed by a microcomputer.

For the focus error signal, phase adjustment processing is carried out to generate a focus drive signal, and then the signal is supplied to the servo driver 9 . The servo driver 9 supplies a voltage to the focusing coil of the dual axis mechanism 3 as Ant word on the focusing drive signal, and then controls the lens 3 in a focusing direction, so that the ses shifts away in the direction of the plate or thereof.

In addition, the servo circuit 8 performs phase adjustment processing or the like for the tracking error signal TE to generate a tracking control driving signal, which signal is then supplied to the servo driver 9 . The servo driver 9 applies a voltage to the tracking coil of the double-axis mechanism 3 in response to the tracking control drive signal, thereby driving the lens in a tracking direction.

In addition, the servo circuit 8 extracts a low-range component of the tracking error signal TE to generate a transmission control signal, which signal is then supplied to the servo driver 9 . The servo driver 9 controls a gear mechanism 4 in response to the gear drive signal and controls the optical head 2 and the magnetic head 6 in a radial direction of the disk.

During the access drive operation, the transmission drive signal is generated in response to an instruction provided by the system controller 21 , which results in the transmission mechanism 4 being driven.

In addition, the servo circuit 8 compares a speed scan information of the spindle motor 2 with a reference speed information and generates a CLV drive signal which is used to keep the rotation of the spindle motor 1 at a constant speed. Either a reproduction clock CK _EFM generated by the EFM PLL circuit 12 or a groove clock CK _{GV obtained} by the groove PLL circuit 13 is used as the speed scanning information (phase / frequency error information) of the spindle motor 2 . The EFM-PLL circuit 12 detects an edge of the EFM signal, supplies these generated in the PLL loop, thereby forming a reproduction clock CK _EFM synchronization with the EFM signal, that is, it includes reproducing clock CK _EFM a spindle rotational speed information. In addition, since an EFM signal is not extracted when recording is performed for the MD 90 , a groove clock CK _GV , which is obtained by supplying the groove information GV into the PLL loop, is used as the clock synchronized with the rotation of the spindle is created.

The CLV drive signal, which is generated by the servo switching device 8 , a three-phase drive signal is changed, for example in the servo drive 9 , and applied to the spindle motor 2 , and then a speed of the spin del motor 2 is controlled.

The EFM encoder and decoder 11 performs coding and decoding relating to 8-on-14 modulation of a modulation system used for the MD system and the CD system where decoding processing for the re-produced EFM Signal and an EFM coding processing for the signal to be recorded on the MD 90 is carried out. The EFM encoder and decoder 11 can serve as a decoder to decode the EFM signal which is supplied via the multiplexer 10 and to deliver this to the ECC encoder and decoder 16 . Also, when a reproduction operation is performed, an address and other subcode information are extracted from the EFM decoding data by the subcode decoder 14 .

In addition, as the reference clock for the decoding processing operation, the reproduction clock CK _EFM reproduced by the EFM PLL circuit 12 is applied.

When recording is performed for the MD 90 , the EFM encoder and decoder 11 can serve as an encoder, and the encoded data (EFM signal) is supplied to the magnetic head driver 7 . In this case, the magnetic head control 7 causes the magnetic head 6 to apply a magnetic field N / S as a function of the EFM signal pulse. When recording is carried out, the EFM data is not read, and thus the address information or the like processed by the subcode decoder 14 is not read, so that the address information resulting from groove information GV by the groove co dier 15 was extracted, is used for a control operation.

A is used as the reference clock for coding processing specified master clock used.

The ECC encoder and decoder 16 is operated to perform coding and decoding in the area of an error correction system (CIRC system) used in the MD system and the CD system. The ECC encoder and decoder 16 can serve as a decoder in the case where a playback operation is performed so as to perform an error correction operation for data supplied from the EFM encoder and decoder 11 .

In addition, in the case where the recording operation is performed, the ECC encoder and decoder 16 can serve as an encoder and can also perform additional processing of the error correction code with respect to the data provided by the sector encoder and decoder 17 .

The audio compression / expansion signal processing section 19 performs encoding / decoding (expansion) with respect to an audio compression system used in the MD system.

The audio compression / expansion signal processing section 19 can serve as a decoder in the case where a reproducing operation is performed on the MD 90 , audio compression decoding (expansion processing with respect to audio compression) with respect to the data read from the buffer memory 20 , perform, and demodulate digital audio data in a sample form from 16-bit quantization and 44.1 kHz. This demodulated digital audio data is converted into an analog audio signal by the D / A converter 23 via the multiplexer 22 , and then this signal is output as a playback audio signal at the output terminal 24 .

When recording is performed for the MD 90 , the audio compression / expansion signal processing section 19 can serve as an encoder. That is, in the case where the analog audio signal, which is fert GELIE from the input terminal 25, 16-bit quantization is converted and 44.1 kHz by the A / D converter 26 into digital audio data of a scanning form of a, and further to the audio compression / expansion signal processing section 19 , compression processing is carried out to compress the supplied data to about 1/5. The compressed data is written once into the buffer memory 20 under control of the memory controller 18 .

Although the buffer memory 20 , which consists of the DRAM (dynamic RAM), is used to realize a so-called shock protection function when MD recording and playback is performed, its task will be described in detail later. In this case, this is used to implement a shock protection function during CD playback or for copying from the CD to the MD. Specifically, when copying from the CD to the MD, a storage area is set to be divided into an area A and an area B as shown in the figure, and each of the areas is individually for a predetermined storage mode is used.

Although a DRAM in area A and area B for whose operation is divided, two memory ICs can for example in a preferred embodiment for the Be drive used.

The CD (Compact Disc) 91 , which is installed in a CD playback control system, is used as an exclusive playback medium on which audio data are previously recorded in the form of embossed pits. The CD format does not use audio compression processing or sector coding, but the data format in which digital audio data in the form of a sample of 16-bit quantization and 44.1 kHz is ECC-encoded and EFM-encoded recorded.

The CD 91 is driven by the spindle motor 31 at a constant speed (CLV) during the playback operation of the CD. Then, data recorded in the form of pits on the CD 91 is read by the optical head 32 and supplied to the RF amplifier 35 . The lens 32 a in the optical head 32 is held by the double-axis mechanism 33 and can be moved in a tracking direction as well as in a focusing direction.

In addition, the optical head 32 can be moved by the gear mechanism 34 in a radial direction of the CD 91 .

In the RF amplifier 35 , a focus error signal FE and a tracking error signal TE as well as the reproduced RF signal are generated, and these error signals are supplied to the servo circuit 36 . The servo circuit 36 generates various types of control signals, for example a focus control signal, a tracking control control signal, a gear control signal and a spindle control signal depending on the focusing error signal FE and the tracking error signal TE and supplies them to the servo control 37 . The servo control 37 controls the operation of the Doppelachsenme mechanism 33 , the gear mechanism 34 and the spindle motor 31 in dependence on these control signals.

These processing procedures are substantially similar to those of the servo circuit 8 and the servo driver 9 in the MD recording and playback drive system.

Although the playback RF signal is converted into a binary code in the RF amplifier 35 to form an EFM signal, the present invention is such that no decoding system is provided which is exclusive to the CD playback drive system, so that the EFM signal is supplied to the EFM encoder / decoder 11 via the multiplexer 10 . In addition, the playback clock CK _EFM , which is in synchronization with the data playback obtained from the CD 91 , is generated by the EFM PLL circuit 12 .

When the CD is reproduced, the EFM encoder and decoder 11 can serve as an EFM decoder, and also the ECC encoder and decoder 16 can serve as an ECC decoder. Then, the data read from the CD 91 through ECC decoding processing in the ECC encoder and decoder 16 is demodulated into a digital audio data format with a sample of 16-bit quantization and 44.1 kHz. These digital audio data are converted into an analog audio signal in the D / A converter 23 via the buffer memory 20 and the multiplexer 22 and output at the output terminal 24 .

In addition, the subcode decoder 14 is used to extract control data such as content data (TOC) or subcodes or the like when the CD 91 is reproduced.

The system controller 21 is composed of a microcomputer and performs control to cause each section to perform a necessary operation for the MD playback operation, the MD recording operation, the CD playback operation, and the CD-MD copying operation.

That is, the system controller 21 performs control for the servo circuit 8 , causes the MD recording and playback driving system (optical head 2 or the like) to perform required operation, and performs control for the servo circuit 36 further that the CD playback drive system (optical head 32 or the like) performs a necessary operation.

The system controller can also execute an instruction for encoding and decoding processing for the EFM encoder and decoder 11 , the ECC encoder and decoder 16 , the sector encoder and decoder 17 and the audio compression and expansion signal processing section 19 .

In addition, this system controller issues an instruction to select an input signal to be output by the multiplexers 10 , 22 and 27 .

In addition, this system controller may issue an instruction to the memory controller to write to or read from the buffer memory 20 , generate an address, and set an area or the like.

In addition, the address information on the disk and other control information for use in controlling the system controller 21 are obtained from the subcode decoder 14 or the rail decoder 15 .

An operating section 29 has a recording key, a playback key, a stop key, an AMS key (Auto Music Sensor) and a search key or the like, which can be operated by a user, thereby also a playback and recording operation for the MD 90 and the CD 91 can be performed. That is, the loading tätigungsinformation, which is supplied from the operating portion 29 is supplied to the system controller 21, the system controller 21 causes each section driving the desired loading in response to said operation information and allows operating program run by Be.

In addition, a desired display operation is performed in the display section 30 when the MD 90 is written and the CD 91 is reproduced. For example, various display types, for example, the time information such as the total music playing time, the advancing time in the recording and playback operation, a program number, an operating status and an operating mode or the like are carried out on the basis of the control of the system controller 21 .

Although the multiplexer 10 is provided as a means for selecting a signal to be encoded by the EFM encoder and decoder 11 , and the multiplexer 27 serving as a selector for selecting a signal which is processed by the audio compression and expansion signal processing section 19 To encode, it is of course clear that it is not necessary to arrange either the independent multiplexer 10 or 27 if a device is provided in which the EFM encoder and decoder 11 or the audio compression and expansion signal processing section 19 are optionally opposed can process multiple input signals (ie, one of them has a multiplexer function).

In the component system of the present invention, which is constructed as described above can be an MD re- operation, an MD recording operation, a CD playback operation drive and CD-MD copying can be performed. Each of the Operating modes are described below.

2. Operation when reproducing an MD

In Fig. 3, there is shown a table showing a control operation of the system controller 21 when the MD playback operation is carried out.

Thereafter, the system controller 21 performs necessary control over the servo circuit 8 to cause an MD recording and reproducing drive system to perform an MD 90 optical disk reproducing operation. The playback operation of the MD 90 becomes an operation in which reading data is carried out periodically at a high speed rate depending on the amount of data accumulated in the buffer memory 20 .

In addition, the system controller 21 causes the multiplexer 10 to provide an output signal from the RF amplifier 5 , which is supplied to the EFM encoder and decoder 11 .

In addition, the system controller 21 controls the mode so as to cause the EFM encoder and decoder 11 , the ECC encoder and decoder 16 , the sector encoder and decoder 17, and the audio compression / expansion signal processing section 19 to perform decoding processing .

In addition, the system controller causes the multiple xer 22 to provide an output signal from the audio compression / expansion signal processing section 19 to the D / A converter 23 .

In this case, the buffer memory 20 is not set up to be divided into the area A and the area B as shown in FIG. 2. Then, it instructs the memory controller 18 to write data sector-decoded in the sector encoder and decoder 17 to the audio compression / expansion signal processing section 19 , and to supply data read from the buffer memory 20 to the section 19 . Thereby, the writing operation of the sector-decoded data in the buffer memory 20 becomes a periodic operation at a high speed, and in contrast, reading the data from the buffer memory 20 and supplying the data to the audio compression / expansion signal processing section 19 becomes an ongoing operation at a normal speed.

The MD playback operation which is under such control is carried out as follows.

A CLV rotary control, focusing and tracking servo system for the spindle motor 1 is turned on by a switch instruction of the servo circuit 8 by the system controller 21 , and then data reading is started with the optical head 2 .

The information obtained from the MD 90 with the optical head 2 under this reproducing operation is supplied to the RF amplifier 5 . Then, the reproduced RF signal is extracted by the RF amplifier 5 , the EFM signal, which is obtained by its binary coding processing, is by the EFM encoder and decoder 11 , the ECC encoder and decoder 16 and the sector encoder and Decoder 17 , which is held in a decoding mode, decodes, after which the signal is written once in the buffer memory 20 by the memory controller 18 .

The reading of the data from the MD 90 with the optical head 2 and the transmission of the reproduced data in the system in the area from the optical head 2 to the buffer memory 20 is carried out periodically at a speed of 1.41 Mbit / s.

The data written in the buffer memory 20 is read in such a timing as that in which the reproduction of the reproduced data is performed at 0.3 Mbit / s, and then the data becomes the audio compression / expansion signal processing section 19 dear fert. Then, reproduction signal processing, for example, audio expansion processing, is performed, and the signal is supplied to the multiplexer 22 as audio data with sampling from 16-bit quantization and 44.1 kHz.

As described above, since the multiplexer 22 selects an output signal which has not been compressed by the audio compression / expansion signal processing section 9 when the MD 90 is reproduced, the digital audio signal output from the audio compression / expansion signal processing section 19 into an analog one Signal converted by the D / A converter 23 and output at the output terminal 24 as a reproduced audio signal.

In this case, although the writing and reading of data into or from the buffer memory 20 is carried out by the memory controller 18 by controlling the write pointer and the read pointer under their addressing operation, the write pointer (write address) becomes in a timing of 1.41 Mbit / s and on the other hand, the read pointer (read address) increments at a clock rate of 0.3 Mbit / s. A certain amount of accumulated data is stored in the buffer memory 20 due to a difference between the write bit rate and the read bit rate. When the full data capacity is reached (accumulated) in the buffer memory 20 , the increment of the write pointer is stopped, and the data reading of the photo magnetic disk MD 90 with the optical head 2 is also stopped. However, since the incrementation of the read pointer is carried out continuously, the result is that the reproduction of audio output data is not interrupted.

After this operation, the reading operation of the Puf is continued only ferspeichers 20, and if an accumulated amount of data in the buffer memory 20 is less than a predetermined amount within a certain time, data read by the optical head and the incrementation of the write pointer as derbegonnen and the data are collected in the buffer memory 20 .

In this way, the playback audio signal is output from the buffer memory 20 , even if a track falls off the regular course due to an external disturbance or the like, the audio output signal is not interrupted, and a correct tracking position is accessed for example, while the accumulated data is left to start reading data again, whereby the operation can be continued without exerting any influence on the playback output signal. That is, it is possible to achieve a remarkable improvement in the anti-vibration function (shock protection function).

3. MD recording operation

A control operation of the system controller 21 when a recording operation for the MD is carried out may be as shown in FIG. 4.

The system controller 21 performs necessary control over the servo circuit 8 to make the MD recording and playback driving system perform the recording operation for the MD 90 photo magnetic disk. The recording operation for the photo magnetic disc MD 90 is carried out periodically until the amount of data collected in the buffer memory 20 reaches a predetermined amount of the total data.

In addition, the system controller 21 controls an operation mode in such a manner that coding processing in the EFM encoder and decoder 11 , in the ECC encoder and decoder 16 , in the sector encoder and decoder 17 and in the audio compression / expansion encoder and decoder 19 is carried out.

In addition, data that is audio-compressed during its processing is supplied from the input terminal 25 through the multiplexer 27 , audio data converted into digital form through the A / D converter 26 is selected and sent to the audio compression / expansion processing section 19 delivers.

In this case, too, the buffer memory 20 is not divided into the area A and the area B, as is shown in FIG. 2. Then, the memory controller 18 to perform a au tomatisches supplying write data which have been processed is compressed audio to the audio compression and expansion of signal processing section 19, and data read from the buffer memory 20, decoder to supply Sektorcodierer and Deco 17th

The write operation for the audio-compressed data in the buffer memory 20 becomes an ongoing operation at a normal speed. That is, the input audio signal to the input terminal 25 in its time course is beitet audio-verar, and then the signal is written to the buffer memory 20th On the other hand, the data reading from the buffer memory 20 and the data supply to the sector encoder and decoder 17 are carried out periodically at a high speed each time the accumulated amount of data in the buffer memory 20 reaches a predetermined amount.

The MD recording operation under this control as described above is carried out as follows leads.

The CLV rotary operation of the spindle motor 1 and the focussing and tracking servo system are switched on with a switch-on instruction for the servo circuit 8 with the system control 21 , and the laser irradiation with a recording level is started with the optical head 2 . In the recording operation, the groove decoder 15 can obtain an address in the disc with the groove information GV read by the optical head 2 .

When a recording operation is performed for the MD 90 , the analog audio signal supplied to the input terminal 25 is changed into 16-bit quantization and 44.1 kHz sampling digital data by the A / D converter 26 finally supplied to the audio compression / expansion signal processing section 19 via the multiplexer 27 , and the audio compression processing for compressing an amount of data to about 1/5 is carried out.

The record data, which has been compressed by the audio compression / expansion signal processing section 19 , is once written into the buffer memory 20 via the memory controller 18 , read in a predetermined time and supplied to the sector encoder and decoder 17 .

When operating in the buffer memory 20 , the write pointer (write address), in contrast to the playback mode, is incremented with a time clock of 0.3 Mbit / s in order to cause the supplied audio data to be written optionally into the buffer memory 20 . Then, when the data is accumulated to a certain extent in the buffer memory 20 , the read pointer is incremented at a timing of 41 Mbit / s, and the data that has been accumulated is read and supplied to the encoder and decoder section 8 .

Thus, the supply of data to the sector encoder and decoder 17 is performed periodically in response to the accumulated data amount of the buffer memory 20 .

The sector encoder and decoder 17 , the ECC encoder / decoder 16, and the EFM encoder and decoder 11 are set to the encoding mode, and the data read from the buffer memory 20 is processed with encodings, e.g., sector encoding, one CIRC coding and an EFM modulation, and then the EFM signal is supplied to the magnetic head driver 7 .

The magnetic head driver 7 supplies a magnetic head drive signal to the magnetic head 6 in response to the EFM signal which has been processed by the coding operation. That is, a magnetic field with an N pole or S pole is applied to the magnetic head for the MD 90 photo magnetic disk.

4. CD play mode

In Fig. 5, a control operation of the system controller 21 for the CD playback operation is shown.

That is, the system controller 21 performs necessary control for the servo circuit 36 to perform playback operation of the optical disk CD 91 for the CD playback drive system.

The playback operation for the optical disk CD 91 may be a current playback drive at a normal speed or a periodic data reading at a high speed as shown by the parentheses in response to the amount of data accumulated in the buffer memory 20 .

The system controller 21 supplies an output signal of the RF amplifier 35 for the multiplexer 10 to the EFM encoder and decoder 11 .

In addition, for the EFM encoder and decoder 11 , and the ECC encoder and decoder 16, the mode is controlled so that the decoding processing is carried out. When playing the CD, the sector encoder and decoder 17 and the audio compression / expansion signal processing section 19 are not used.

In addition, the data which are read from the buffer memory 20 are supplied to the D / A converter 23 via the multiplexer 22 .

In this case, too, the area A and the area B are not divided with respect to the buffer memory 20 , as shown in FIG. 2.

Then, the memory controller 18 is instructed to write data that has been CIRC decoded by the ECC encoder and decoder 16 to the buffer memory, and to supply data to be read from the buffer memory 20 via the multiplexer 22 to the D / A converter 23 . In the case where a current playback drive is performed at a normal speed with the optical head 32 , the write / read for the buffer memory 20 is continuously performed at a normal speed, whereas in the case where a periodic playback drive is carried out at a normal speed with the optical head 32 is performed, the write operation for the data that has been CIRC decoded into the buffer memory 20 becomes a periodic operation at a high speed, and again the data reading of the buffer memory 20 and providing the operation for the D / A - Converter 23 becomes an ongoing operation at a normal speed.

The playback mode of the CD, under this control is carried out as follows.

The CLV rotary operation of the spindle motor 31 and the focussing and tracking servo system are switched on at the switch-on instruction for the servo circuit 36 by the system controller 21 , whereupon the data reading with the optical head 32 is started.

Through this reproducing operation, the information obtained by the photo-magnetic (more correctly: optical) plate 91 having the optical head 32 is supplied to the RF amplifier 35 . Then, the reproduced RF signal is extracted by the RF amplifier 35 , and the EFM signal, the signal having been converted into a binary code, is decoded by the EFM encoder and decoder 11 , which is kept in its decoding mode. so that this is changed into a scan digital data format with a 16-bit quantization and 44.1 kHz, after which this signal is written once in the buffer memory 20 by the memory controller 18 .

In addition, control data, for example TOC (table of contents) or the subcode or the like, is extracted in the subcode encoder 14 and supplied to the system controller 21 and used for various types of control.

Data written in the buffer memory 20 is read at a timing at which transmission of the reproduced data becomes a normal speed, and then this data is supplied to the multiplexer 22 .

As described above, since the multiplexer 22 selects the read data of the buffer memory 20 when the optical disk CD 91 is reproduced, the digital audio signal obtained from the buffer memory 20 is converted into an analog signal by the D / A converter 23 and output 24 at the output terminal as a reproduced audio signal.

Even in the CD playback operation, as described above, the audio data read from the optical disk CD 91 is once written into the buffer memory 20 , although in this case too, the writing and reading of the data from the buffer memory is carried out by specifying an address at control of a write pointer and a read pointer is performed, which is performed by the memory controller 12 .

As described above, the CD playback operation performed by the optical head 32 or the like can be performed continuously at a normal speed, although it can be performed periodically at a high speed. When the periodic high-speed operation is carried out, a read operation from the optical disk CD 91 , data transfer and incrementation of the write pointer (write address) are carried out at a high speed. For example, the spindle motor 31 is rotated at a speed twice that of the original speed, and the data transfer rate is 2.8 Mbit / s. Although the read pointer (a read address) is incremented at normal speed (1.4 Mbit / s) to perform normal audio output operation, the data is always collected to some extent in the buffer memory 20 , with the result that even at the playback operation of the optical disc CD 91 it becomes possible to realize a high anti-vibration function in the same manner as in the playback operation of the MD 90 .

5. Copying from CD to MD

In Fig. 6, a control operation of the system controller 21 is shown when a copying operation is carried out from the optical disc CD 91 to the photo magnetic disc MD 90 .

The system controller 21 controls the servo circuit 36 so as to cause the CD playback drive system to perform a periodic data read operation of the MD 90 photo magnetic disk (more correctly: CD 91 optical disk) at a high speed.

In addition, the servo circuit 8 is controlled so as to cause the MD recording and playback drive system to perform a high-speed periodic data reading operation for the MD 90 photo magnetic disk. A playback control for the optical disk CD 91 and a recording drive for the photo magnetic disk MD 90 are carried out at different times, with the result that each of the driving modes is executed periodically.

In addition, the system controller 21 causes the multiple xer 10 to provide an output signal from the RF amplifier 35 to the EFM encoder and decoder 11 .

It can also control an operation mode for the EFM encoder and decoder 11 and the ECC encoder and decoder 16 depending on a timing, so as to switch between encoding processing and decoding processing.

Also in the sector encoder and decoder 17 , the code processing operation and the shutdown operation are switched depending on a timing.

In addition, the audio compression / expansion signal processing section 19 is normally operated in an encoding mode.

It can also cause the multiplexer 22 to select data to be output as audio data and the multiplexer 27 to select audio-compressed data to select data to be read from the area A of the buffer memory 20 .

When the copying operation is carried out, the buffer memory 20 is arranged to be divided into the area A and the area B, as shown in FIG. 2.

Then, with respect to area A, it can cause the ECC encoder and decoder 16 to periodically write data at a high speed which is CIRC decoded and to continuously read written data at a normal speed.

In addition, with respect to the area B, it can cause the audio compression / expansion signal processing section 19 to carry out ongoing writing of audio-compressed data at a normal speed and reading of written data at a high speed each time the collected amount of written data is given level reached.

The CD-MD copying operation carried out under this control as described above is carried out as follows. A switching time for each control operation is shown in Fig. 7A to 7J, wherein the copying operation while keeping the switching times is described as follows.

Assume that the copying operation is started at time t0 as shown in Figs. 7A to 7J.

At this time, as shown in Fig. 7A, data reading from the optical disk CD 91 is started by the CD playback drive system consisting of the spindle motor 31 or the optical head 32 or the like. During this operation, the speed of the spindle motor 31 is set to a high speed revolution, that is, the data reading operation is carried out at a high speed.

Then, the EFM signal extracted by the RF amplifier 35 from the information obtained by the optical head 32 from the optical disk CD 91 is extracted through the multiplexer 10 by the EFM encoder and decoder 11 and the ECC encoder and decoder 16 , which are kept in the decoding mode during this period, as shown in Figs. 7B and 7C, which results in that it converts into a digital sample audio data format with 16-bit quantization and 44.1 kHz can be shaped.

As shown in the upper stage in FIG. 7E, the decoded digital audio data is written into the area A in the buffer memory 20 at a high speed.

The data written in the area A in the buffer memory 20 is read at a timing where transmission of the reproduced data is operated at a normal speed as shown in a lower stage in Fig. 7E, and then this data supplied to the two multi plexers 22 , 27 .

At this time, since the multiplexer 22 selects the read data of the buffer memory 20 , the digital audio data read from the buffer memory 20 are converted into an analog audio signal by the D / A converter 23 and used as the monitor audio output signal of the Copy operation at the output terminal 24 , as shown in Fig. 7F, is output.

Although the data (the digital data with a sample of a 16-bit quantization and 44.1 kHz) / Expansionssignalverarbei line section from the buffer memory 20 and the audio compression are supplied 19 via the multiplexer 27, the audio compression / expansion processing section 19 is applied to the encoding mode is set and then audio compression processing is performed to compress an amount of data to about 1/5.

The compressed data is written into the area B in the buffer memory 20 at a normal speed (0.3 Mbit / s) timing, as shown in the upper stage in Fig. 7H.

While the above operation is performed from the time t0 of the start point of the copying operation, the amount of data collected in the area B in the buffer memory 20 gradually increases as shown in Fig. 7I.

In this case, assume that the amount of data collected in area B becomes a predetermined amount at time t1 (n-cluster). A cluster is defined in this example so that it corresponds to a data amount of a minimum unit of the recording operation of the photo magnetic disk MD 90 and the recording is carried out in an n-cluster unit.

As is 7C and 7D in Fig. 7B, the systems controls stemsteuerung 21 the Sektorcodierer and decoder 17, the ECC encoder and decoder 16 and the EFM encoder and decoder 11 so that they are respectively in the encoding mode.

As shown in Fig. 7A, the playback operation of the CD playback control system is stopped and, as shown in Fig. 7J, the recording operation of the MD recording and playback control system is started.

Then, as shown in FIGS. 7E to 7H, the operation for reading the data from the area B is started, as shown in the lower stage in FIG. 7H, while the operation is carried out at a normal speed, for example the area A data reading, the monitor output with the reading data, the audio compression processing for reading the data, and the writing of the compressed data is performed as it is. This data reading operation is carried out at a high speed (for example 1.41 Mbit / s).

The data reading of area B is performed for coding processing such as sector coding, CIRC coding and EFM modulation by the sector encoder and decoder 17 , the ECC encoder and decoder 16 and the EFM encoder and decoder 11 are set in the coding mode, and then the EFM signal is supplied to the magnetic head driver 7 .

The magnetic head drive 7 supplies a magnetic head control signal to the magnetic head 6 in response to the encoded-processed EFM signal and causes the magnetic head 6 for the photo-magnetic disc MD 90 to apply a magnetic field with either the N-pole or the S-pole.

Following this time t1, checking the area B in the buffer memory 20 shows that the writing continues at the normal speed and that the reading operation is carried out at the high speed so that the amount of data accumulated decreases as shown in Fig. 7J.

The MD recording operation starting from time t1 started, will be terminated when a data recording ent speaking the n cluster is terminated, for example. If assumes that this time is equal to, for example, t2, a similar operation corresponding to the period t0 to t1 from time point t2 executed on.

That is, a high-speed reproducing operation is carried out for the optical disk CD 91 in the CD reproducing control system, the reproduced data are decoded by the EFM encoder and decoder 11 and the ECC encoder and decoder 16 , and then in the area A. of the buffer memory 20 are written.

Although the modes that are performed at a normal speed, for example, the data reading of the area A, the monitor output of the reading data, the audio compression processing of the reading data, and the writing of the audio compression processing data into the area continue as they are, the modes, which range from reading data from area B to recording with the magnetic head 6 , are not carried out.

Although accumulated data in area B again due to the operation that follows the time t2, becomes the operation that is similar to that during the periods t1 to t2 is carried out after the time t3 performed when the accumulated amount in the n cluster Time t3 reached.

Such an operation as above will take turns after done in the same way and then the knockout the CD was carried out on the MD.

Although in the component system disclosed by the present invention, MD reproduction, MD recording, CD playback and copying from CD to MD can be carried out as described above, the exclusive decoding system is not in the CD Playback drive system in the present invention, and the decoding processing during CD reproduction by the EFM encoder and decoder 11 and the ECC encoder and decoder 16 is performed.

In the case where copying is performed reproducing the CD and writing the MD, the buffering function of the buffer memory 20 is applied so that the CD playback period (t0 to t1, t2 to t3 shown in Figs. 7A to 7B) 7J) and the MD-recording period is divided (t1 to t2 and t3 to t4, shown in Fig. 7A to Fig. 7J), whereby the CD reproduction and the MD recording is performed speed with a Hochgeschwin, and simultaneously therewith, The operation of the EFM encoder and decoder 11 and the ECC encoder and decoder 16 is set to the decoding mode and the coding operation in a staggered manner, whereby the copying can be carried out without an exclusive decoding system being set up in the CD playback drive system.

Based on the above, the component system according to the present invention can enable a circuit size which is significantly reduced, whereby the MD reproduction, the MD description, the CD reproduction and the copying from the CD to the MD can be carried out . As a result, effects such as the provision of structurally small equipment, low production costs and a reduction in the power consumption can be achieved. In addition, it becomes possible to reduce the number of ports in a microcomputer of the system controller 21 .

In addition, audio output from the buffer memory 20 is also performed during the CD playback operation in the present invention, so that it is possible to realize a shock protection function for the CD playback operation as well as the MD playback operation.

Although each of the operating modes continue to be alternative as described above for the CD playback period and the MD recording period when copying is performed is performed, a monitor audio output for the Be Users run in the same way as normal CD playback operation performed so that the present Er can be designed to listen to music during the Copy operation is in progress.  

6. Construction example of the component system in one modified form

In FIG. 8, a structure of the CD-MD-component system based on a modified example is shown.

In this example, the area of the buffer memory 20 is not subdivided, while the other configurations are fundamentally similar to those shown in FIG. 1, the similar areas being provided with the same reference numerals and their description being omitted.

The MD playback mode and the MD recording mode drive in this case is similar to the previous case game.

In CD playback operation, a reproduced signal is output via a path which is taken from the optical head 32 , the RF amplifier 35 , the multiplexer 10 , the EFM encoder and decoder 11 , the ECC encoder and decoder 16 , the multiple xer 22 , the D / A converter 23 extends to the output terminal 24 . In this example, the signal is not passed through the buffer memory 20 , and thus the signal transmission is carried out at a normal speed. However, even in this case, the operation is carried out so that an output signal of the ECC encoder and decoder 16 is collected in the buffer memory 20 at a high speed, and the data read at a normal speed is supplied to the D / A converter 23 and output at the output terminal 24 , so that a so-called shock protection function can also be achieved.

7. Operation of the component system when copying from the CD on the MD in its modified form

In the example shown in Fig. 8, the monitor output for the reproduced CD audio sound is not performed when copying from the CD to the MD is performed.

In Fig. 9, a control operation of the system controller 21 is shown when copying from the optical disk CD 91 to the photo magnetic disk MD 90 is performed.

The system controller 21 controls the servo circuit 36 to cause the CD playback drive system to read data on the CD 91 . In addition, the servo circuit 8 is controlled so as to cause the MD recording and playback driving system to perform data recording for the MD 90 photo magnetic disk. The playback driving of the optical disk CD 91 and the recording driving of the photo magnetic disk MD 90 are performed at different times, with the result that each of the driving modes is performed alternately.

In addition, each control mode with a high speed or a normal speed will. Again, one of these can run at a high speed and the other at a normal speed leads. When the CD playback audio voice is not monitored when copy recording is in progress, such as found in the present invention are Operating speeds during playback and up drawing operation not restricted. However, it is clear that each drive operation at high speed can be performed to enable the copying operation can be ended quickly and excellently.

In addition, the system controller 21 causes the multiple xer 10 to provide an output signal of the RF amplifier 35 to the EFM encoder and decoder 11 .

In addition, an operation mode is controlled so that the encoding processing and the decoding processing can be switched depending on the timing of the EFM encoder and decoder 11 and the ECC encoder and decoder 16 .

In the sector encoder and decoder 17 , the coding processing and the shutdown operation are switched with respect to a timing.

In addition, in the audio compression encoder and decoder 19, the coding operation and the shutdown operation are switched in an inverse timing to that of the sector encoder and decoder 17 , and at the same time, the data output from the ECC encoder and decoder 16 are selected for the multiplexer 27 by the data to select which are audio compressed.

When this copying operation is carried out, the buffer memory 20 is not divided into the area A and the area B, as shown in FIG. 2, for example. Thus, in the buffer memory 20, the writing of the audio data processed by the audio compression / expansion signal processing section 19 and the reading are carried out each time an accumulated amount of written data reaches a predetermined amount.

Copying from the CD to the MD, which is carried out under the control described above, is carried out as follows. In Fig. 10A to 10H the SHIFT a timing is shown for the control operation. Then, a copying operation in connection with this timing is described.

Assume that the copying operation is started at time t10 as shown in Figs. 10A to 10H.

From this time, as shown in Fig. 10A, data reading is started on the optical disk CD 91 by the CD playback drive system which is composed of the spindle motor 31 or the optical head 32 or the like.

Then, the EFM signal, which is extracted by the RF amplifier 35 from the information obtained from the optical disc CD 91 with the optical head 32 , is supplied through the multiplexer 10 and through the EFM encoder and decoder 11 and the ECC encoder and decoder 16 , which are held in the decoding mode during this period, are decoded as shown in Figs. 10B and 10C, with the result that a 16-bit quantization and a 44.1 kHz sampling digital audio data format is obtained.

Although this 16-bit quantization and 44.1 kHz sampling digital audio data is supplied to the audio compression / expansion signal processing section 19 through the multiplexer 27 , the audio compression / expansion processing section 19 is set to be in the encoding mode as . 10E shown in Figure, and then a Audiokompressionsver is processing for compressing the data quantity to approximately 1/5 performed.

This data is written into the buffer memory 20 as shown in Fig. 10F.

Since the above operation is carried out from the time t10 of the start of copying, the amount of data accumulated in the buffer memory 20 is gradually increased as shown in Fig. 10G.

It is assumed here that the amount of data collected reaches a predetermined value at time t11 (n-cluster). Then, as shown in Figs. 10B, 10C and 10D, the system controller 21 performs control to set an encoding mode for the sector encoder and decoder 17 , the ECC encoder and decoder 16, and the EFM encoder and decoder 11 len. In addition, as shown in FIG. 10E, the operation of the audio compression / expansion signal processing section 19 is turned off.

As shown in Fig. 10A, the playback operation in the CD playback drive system is stopped and at the same time, as shown in Fig. 10H, recording operation of the MD recording and playback system is started.

As shown in Fig. 10F, data reading from the buffer memory 20 is carried out. The read data is processed with encodings, for example sector encoding, CIRC encoding and EFM modulation by the sector encoder and decoder 17 , the ECC encoder and decoder 16 and the EFM encoder and decoder 11 , and the EFM Si gnal is supplied to the magnetic head control 7 .

The magnetic head control 7 supplies a magnetic head control signal to the magnetic head 6 in response to the encoded-processed EFM signal and carries out an application of a magnetic field with the N pole or S pole with the magnetic head for the MD 90 .

After the time t11, no writing is performed for the buffer memory 20 , but only the read operation is carried out, so that the amount of data accumulated decreases as shown in Fig. 10G.

Then, the MD recording operation started at time t11 is ended once at the time when the n-cluster data recording has ended and the accumulated amount becomes 0. Assuming that this is 04381 00070 552 001000280000000200012000285910427000040 0002019722466 00004 04262, operation similar to that performed during periods t10 through t11 is performed from time t12. That is, the playback operation for the CD 91 is performed by the CD playback drive system, the decoding processing by the EFM encoder and decoder 11 as by the ECC encoder and decoder 16, and the audio compression processing in the audio compression / expansion signal processing section 19 , and further writing the compressed data to the buffer memory 20 is performed.

Although the amount of data accumulated in the buffer memory 20 increases again due to an operation subsequent to the time t12, an operation similar to that performed during the periods t11 to t12 is performed after the time t13 when the accumulated Data quantity n clusters reached at time t13.

Then copying from the CD to the MD in the same way by alternately performing the above Running.

This means that in the component system according to the present invention, audio monitoring cannot be carried out in the case where copying from the CD to the MD, although the MD playback, the MD recording, the CD playback and the Copying from CD to MD can be carried out with a simple circuit that does not have an exclusive decoding system for the CD playback drive system in the same way as shown in FIG. 2. That is, the present invention can have advantages that are small in size, low in manufacturing cost, a reduction in power consumption, and a reduction in the number of ports of the microcomputer acting as the system controller 21 in the same manner as provided in Fig. 2.

In addition, since the buffer memory 20 is not divided into areas, the memory control operation is simplified.

Although the audio monitoring is not performed in the case where copying from CD to MD can be performed Conversely, this means some advantages that allow some kind of CD reproduction and an MD recording at any speed during the copying operation can be carried out, which has the consequence that CD playback and MD recording at high speed abilities, for example four times or eight times Ge speed can be run to the required time to shorten for copying.

Although the present invention is related to these preferred embodiments has been described, the vorlie Invention in various types of component systems will be realized. For example, the present invention  can be realized as a component system which MD player section or MD recording direction section or the recording and reproducing section has cut using a tape carrier or the like, for example a DAT (digital audio tape recorder and re device).

Since in the present invention a special Co dier- and decoding device in general for the special Co dier and decoding processing can be used in the data processing related to the first record carrier and data processing relating to the second order drawing medium is generally carried out, the present ing invention bring some effects with it exist that there is a reduction in the number of component parts or the simplification of the circuit structure can be realized may be, with the operating function of the component system will keep, being a structurally small facility, low Manufacturing costs, a reduction in power consumption, a reduction in the number of ports on the microcomputer and one Reduction of the processing load of the computer can be realized are.

Claims (3)

1. Component system with a recording and playback section, which has:
a playback device ( 31 , 32 , 32 a, 33 , 34 , 35 , 36 ) for use in the playback of a first type of record carrier (CD) which has uncompressed data encoded by a predetermined signal processing system, previously thereon are recorded
a playback and recording device ( 1 , 2 , 2 a, 3 , 4 , 5 , 6 , 7 , 8 , 9 ), which consists of a playback block ( 1 , 2 , 2 a, 3 , 4 , 5 , 8 ), which is capable of reproducing a second type of record carrier (MD) having compression data encoded by the predetermined signal processing system and subjected to a predetermined compression processing recorded thereon and a recording block to to apply the given compression processing after encoding data with the given signal processing system so as to enable the data to be recorded on the second type of recording medium (MD), with a first reproduced signal resulting from the first type of Recording medium (CD) is reproduced in the first playback block, can be copy-processed in the second type of recording medium (MD) in the recording and playback block, and Wei ter has:
a switching device to selectively between a first playback signal, which is reproduced from the first type of record carrier (CD) in the first playback device ( 31 , 32 , 32 a, 33 , 34 , 35 , 36 ), and a second type of playback signal to switch which is reproduced from a two-th kind of record carrier (MD) in the reproducing and recording device;
compression processing means ( 19 ) for applying compression processing to a first reproduction signal reproduced from the first type of recording medium (CD) in the first reproduction means;
a signal processor to decode a reproduced signal provided by the switching means depending on the predetermined signal processing system and also to encode compression data to which compression processing by the compression processing means with the predetermined signal processing system has been applied;
a memory ( 20 ) for storing the compression data to which the compression processing by the compression processing means ( 19 ) has been applied;
discriminating means ( 18 ) for discriminating whether an accumulated amount of compression data stored in the memory is larger than a predetermined amount; and
a controller ( 21 ) for switching the processing in the signal processing device to encoding processing to apply the predetermined signal processing system to the compression data which has been compression-processed by the decoding processing depending on the predetermined signal processing system for a reproduced signal supplied from the switching device , and for switching to stop the playback operation of the first type of recording medium (CD) in the playback device and also to start a recording operation for the second type of recording medium (MD) in the recording block included in the playback and recording device , in the case where the discriminator discriminates that an accumulated amount of the compression data stored in the memory becomes larger than a predetermined amount. 2. Component system according to claim 1, wherein the compression processing device and the Spei cher ( 20 ) in the component system consists of:
a first memory ( 20 with area A) for storing a first reproduction signal reproduced from a first type of recording medium (CD) representing non-compressed data supplied by the signal processing device;
compression processing means for applying compression processing to a first reproduction signal reproduced from a first type of recording medium (CD) which represents compressed data read from the first memory (area A);
a second memory ( 20 with area B) for storing the compressed data to which compression processing has been applied in the compression processing device. 3. Component system with a recording and playback section, which has:
a playback device ( 31 , 32 , 32 a, 33 , 34 , 35 , 36 ) for use in the playback of a first type of record carrier (CD) which has uncompressed data encoded by a predetermined signal processing system previously are recorded on
a playback and recording device ( 1 , 2 , 2 a, 3 , 4 , 5 , 6 , 7 , 8 , 9 ), which consists of a playback block, which is capable of a second type of recording medium (MD) to reproduce the compression data encoded by the predetermined signal processing system and subjected to predetermined compression processing previously recorded thereon, and from a recording block to apply the predetermined compression processing after the data with the predetermined signal processing system were encoded with:
a first switching device for selectively switching between a first playback signal, which represents uncompressed data, which are produced from the first type of record carrier (CD) re in the first playback device, and a second type of playback signal, which represents compressed data be reproduced from a second type of recording medium in the playback and recording device;
a signal processor for decoding a reproduction signal, which is supplied by the first switching device, in dependence on the predetermined signal processing system;
expansion means for performing expansion operation on the second reproduction signal, which represents compression data supplied through the signal processing means;
a second switching device for selectively switching between a second playback signal which has been expanded by the expansion device and a first type of playback signal which is non-compressed data which is supplied via the signal processing device; and
a switching control ( 21 ) for switching the first switching device and the second switching device in dependence on the type of reproduced recording medium (CD, MD).